test-network-k8s: ghcr.io for Hyperledger images (#1416)

Default to using ghcr.io for Hyperledger images in the k8s test network

Signed-off-by: James Taylor <jamest@uk.ibm.com>

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{mj,cj,j,t}s]
+indent_size = 4
+quote_type = single
+
+[*.json]
+indent_size = 4
+
+[*.md]
+max_line_length = off

.github/actions/fsat-setup/action.yaml

@@ -0,0 +1,53 @@
+name: Set up the Full Stack Asset Transfer Guide Dependencies
+description: Set up the Full Stack Asset Transfer Guide Dependencies
+inputs:
+  node-version:
+    description: Version of node
+    default: "lts/*"
+  just-version:
+    description: Just Version
+    default: "1.43.0"
+  k9s-version:
+    description: k9s Version
+    default: v0.50.15
+  fabric-version:
+    description: Version of Hyperledger Fabric
+    default: "2.5.15"
+  ca-version:
+    description: Version of Hyperledger Fabric CA
+    default: "1.5.15"
+
+runs:
+  using: "composite"
+  steps:
+    - uses: actions/setup-node@v6
+      with:
+        node-version: ${{ inputs.node-version }}
+        cache: "npm"
+        cache-dependency-path: "**/package-lock.json"
+
+    - name: Install k9s
+      shell: bash
+      run: |
+        curl --fail --silent --show-error -L https://github.com/derailed/k9s/releases/download/${{ inputs.k9s-version }}/k9s_Linux_amd64.tar.gz -o /tmp/k9s_Linux_amd64.tar.gz
+        tar -zxf /tmp/k9s_Linux_amd64.tar.gz -C /usr/local/bin k9s
+        sudo chown root /usr/local/bin/k9s
+        sudo chmod 755 /usr/local/bin/k9s
+
+    - name: Install just
+      uses: taiki-e/install-action@v2
+      with:
+        tool: just@${{ inputs.just-version }}
+
+    - name: Install weft
+      shell: bash
+      run: |
+        npm install -g @hyperledger-labs/weft
+
+    - name: Install fabric CLI
+      shell: bash
+      working-directory: full-stack-asset-transfer-guide
+      run: |
+        curl -sSL https://raw.githubusercontent.com/hyperledger/fabric/main/scripts/install-fabric.sh \
+          | bash -s -- binary --fabric-version ${{ inputs.fabric-version }} --ca-version ${{ inputs.ca-version }}
+        echo ${PWD}/bin >> $GITHUB_PATH

.github/actions/test-network-setup/action.yaml

@@ -0,0 +1,63 @@
+name: Set up Test Network Runner
+description: Set up the Test Network Runtime
+inputs:
+  go-version:
+    description: Version of go
+    default: stable
+  node-version:
+    description: Version of node
+    default: "lts/*"
+  java-version:
+    description: Version of JDK
+    default: 25.x
+  fabric-version:
+    description: Version of Hyperledger Fabric
+    default: 2.5.15
+  ca-version:
+    description: Version of Hyperledger Fabric CA
+    default: 1.5.15
+
+runs:
+  using: "composite"
+  steps:
+    - uses: actions/setup-go@v6
+      with:
+        go-version: ${{ inputs.go-version }}
+        cache-dependency-path: "**/go.sum"
+
+    - uses: actions/setup-node@v6
+      with:
+        node-version: ${{ inputs.node-version }}
+        cache: "npm"
+        cache-dependency-path: "**/package-lock.json"
+
+    - uses: actions/setup-java@v5
+      with:
+        distribution: temurin
+        java-version: ${{ inputs.java-version }}
+        cache: gradle
+
+    - name: Install fabric CLI
+      shell: bash
+      run: |
+        curl -sSL https://raw.githubusercontent.com/hyperledger/fabric/main/scripts/install-fabric.sh \
+          | bash -s -- binary --fabric-version ${{ inputs.fabric-version }} --ca-version ${{ inputs.ca-version }}
+        echo ${PWD}/bin >> $GITHUB_PATH
+
+    - name: Pull Fabric Docker Images
+      shell: bash
+      run: |
+        curl -sSL https://raw.githubusercontent.com/hyperledger/fabric/main/scripts/install-fabric.sh \
+          | bash -s -- docker --fabric-version ${{ inputs.fabric-version }} --ca-version ${{ inputs.ca-version }}
+
+    - name: Pull chaincode container images
+      shell: bash
+      run: |
+        docker pull ghcr.io/hyperledger/fabric-nodeenv:2.5
+        docker tag ghcr.io/hyperledger/fabric-nodeenv:2.5 hyperledger/fabric-nodeenv:2.5
+        docker pull ghcr.io/hyperledger/fabric-javaenv:2.5
+        docker tag ghcr.io/hyperledger/fabric-javaenv:2.5 hyperledger/fabric-javaenv:2.5
+
+    - name: Install retry CLI
+      shell: bash
+      run: curl -sSL https://raw.githubusercontent.com/kadwanev/retry/master/retry -o ./bin/retry && chmod +x ./bin/retry

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: weekly

.github/settings.yml

@@ -0,0 +1,14 @@
+repository:
+  name: fabric-samples
+  description: Samples for Hyperledger Fabric
+  homepage: https://lf-hyperledger.atlassian.net/wiki/spaces/fabric
+  default_branch: main
+  has_downloads: true
+  has_issues: true
+  has_projects: false
+  has_wiki: false
+  archived: false
+  private: false
+  allow_squash_merge: true
+  allow_merge_commit: false
+  allow_rebase_merge: true

.github/workflows/lint.yaml

@@ -0,0 +1,65 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Lint 🎉
+run-name: ${{ github.actor }} is linting fabric-samples 🎉
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main", "release-2.5"]
+  pull_request:
+    branches: ["main", "release-2.5"]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  NODE_VER: "lts/*"
+  JAVA_VER: 25.x
+
+jobs:
+  go:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/setup-go@v6
+        with:
+          go-version: stable
+      - uses: actions/checkout@v6
+      - run: go install golang.org/x/tools/cmd/goimports@latest
+      - run: ci/scripts/lint-go.sh
+
+  typescript:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ env.NODE_VER }}
+      - run: ci/scripts/lint-typescript.sh
+
+  javascript:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ env.NODE_VER }}
+      - run: ci/scripts/lint-javascript.sh
+
+  java:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: ${{ env.JAVA_VER }}
+      - run: ci/scripts/lint-java.sh
+
+  shell:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - run: ci/scripts/lint-shell.sh

.github/workflows/rest-sample.yaml

@@ -0,0 +1,58 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: REST Sample 🐧
+run-name: ${{ github.actor }} is testing the REST Sample 🐧
+
+env:
+  NODE_VER: "lts/*"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main", "release-2.5"]
+    paths: ["asset-transfer-basic/rest-api-typescript/**"]
+  pull_request:
+    branches: ["main", "release-2.5"]
+    paths: ["asset-transfer-basic/rest-api-typescript/**"]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test-sample:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ env.NODE_VER }}
+          cache: "npm"
+          cache-dependency-path: "**/package-lock.json"
+
+      - name: Install REST Sample Dependencies
+        working-directory: asset-transfer-basic/rest-api-typescript
+        run: npm install
+
+      - name: Build REST Sample Application
+        run: npm run build
+        working-directory: asset-transfer-basic/rest-api-typescript
+
+      - name: Test REST Sample Application
+        run: npm test
+        working-directory: asset-transfer-basic/rest-api-typescript
+
+      - name: Build REST Sample Docker Image
+        run: docker build -t ghcr.io/hyperledger/fabric-rest-sample .
+        working-directory: asset-transfer-basic/rest-api-typescript
+
+      - name: Publish REST Sample Docker Image
+        if: github.event_name == 'push' && (github.ref == 'refs/heads/main')
+        run: |
+          echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+          docker push ghcr.io/hyperledger/fabric-rest-sample:latest
+        working-directory: asset-transfer-basic/rest-api-typescript

.github/workflows/test-fsat.yaml

@@ -0,0 +1,59 @@
+name: Full Stack Asset Transfer Guide 🚀
+run-name: ${{ github.actor }} is testing the Full Stack Asset Transfer Guide 🚀
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - "main"
+      - "release-2.5"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ansible:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Full Stack Runtime
+        uses: ./.github/actions/fsat-setup
+      - run: just test-ansible
+        working-directory: full-stack-asset-transfer-guide
+
+  appdev:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Full Stack Runtime
+        uses: ./.github/actions/fsat-setup
+      - run: just test-appdev
+        working-directory: full-stack-asset-transfer-guide
+
+  chaincode:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Full Stack Runtime
+        uses: ./.github/actions/fsat-setup
+      - run: just test-chaincode
+        working-directory: full-stack-asset-transfer-guide
+
+  cloud:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Full Stack Runtime
+        uses: ./.github/actions/fsat-setup
+      - run: just test-cloud
+        working-directory: full-stack-asset-transfer-guide
+
+  console:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Full Stack Runtime
+        uses: ./.github/actions/fsat-setup
+      - run: just test-console
+        working-directory: full-stack-asset-transfer-guide

.github/workflows/test-high-throughput.yaml

@@ -0,0 +1,49 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test High Throughput
+run-name: ${{ github.actor }} is running the High Throughput tests
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main", "release-2.5"]
+  pull_request:
+    branches: ["main", "release-2.5"]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  basic:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Start Fabric
+        working-directory: high-throughput
+        run: ./startFabric.sh
+
+      - name: Test High Throughput
+        working-directory: high-throughput/application-go
+        run: |
+          go run . manyUpdates testvar1 100 +
+          go run . prune testvar1
+          go run . get testvar1
+          go run . update testvar1 100 +
+          go run . get testvar1
+          go run . delete testvar1
+          go run . manyUpdatesTraditional testvar2 100 +
+          go run . getstandard testvar2
+          go run . updatestandard testvar2 100 +
+          go run . getstandard testvar2
+          go run . delstandard testvar2
+
+      - name: Stop Fabric
+        working-directory: high-throughput
+        run: ./networkDown.sh

.github/workflows/test-network-basic.yaml

@@ -0,0 +1,39 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network Basic 🔎
+run-name: ${{ github.actor }} is running the Test Network Basic tests 🔎
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  basic:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - javascript
+          - typescript
+          - java
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test Network Basic
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-basic.sh
+        env:
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}

.github/workflows/test-network-bft-orderer.yaml

@@ -0,0 +1,49 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network BFT Orderer 🍟
+run-name: ${{ github.actor }} is running the Test Network with BFT Orderer tests 🍟
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  basic:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - javascript
+          - typescript
+          - java
+        crypto:
+          - cryptogen
+          - ca
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+        # Note: The default Fabric version for CI is currently the latest LTS (v2.5.x).
+        # To test BFT Orderers, Fabric v3.x is explicitly specified here.
+        with:
+          fabric-version: 3.1.4
+
+      - name: Run Test Network with BFT Orderers
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-basic.sh
+        env:
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}
+          ORDERER_TYPE: bft
+          CRYPTO: ${{ matrix.crypto }}

.github/workflows/test-network-events.yaml

@@ -0,0 +1,41 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network Events 💡
+run-name: ${{ github.actor }} is running the Test Network Events tests 💡
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  events:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - javascript
+          - java
+        chaincode-name:
+          - events
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-events.sh
+        env:
+          CHAINCODE_NAME: ${{ matrix.chaincode-name }}
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}

.github/workflows/test-network-hsm.yaml

@@ -0,0 +1,51 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network HSM 🍏
+run-name: ${{ github.actor }} is running the Test Network HSM tests 🍏
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  hsm:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - javascript
+          - typescript
+          - java
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Install SoftHSM
+        run: sudo apt install -y softhsm2
+
+      - name: Set up SoftHSM
+        env:
+          TMPDIR: ${{ runner.temp }}
+          SOFTHSM2_CONF: ${{ github.workspace }}/softhsm2.conf
+        run: |
+          echo "directories.tokendir = ${TMPDIR}" > "${SOFTHSM2_CONF}"
+          softhsm2-util --init-token --slot 0 --label "ForFabric" --pin 98765432 --so-pin 1234
+
+      - name: Run Test Network HSM
+        working-directory: test-network
+        env:
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}
+          SOFTHSM2_CONF: ${{ github.workspace }}/softhsm2.conf
+        run: ../ci/scripts/run-test-network-hsm.sh

.github/workflows/test-network-k8s.yaml

@@ -0,0 +1,124 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Kubernetes Test Network 🍒
+run-name: ${{ github.actor }} is testing the Kubernetes Test Network 🍒
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ccaas-java:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Test the network
+        id: run-test
+        working-directory: test-network-k8s
+        run: ../ci/scripts/run-k8s-test-network-basic.sh
+        env:
+          CLIENT_LANGUAGE: typescript
+          CHAINCODE_LANGUAGE: java
+      - name: Upload failure logs
+        if: ${{ failure() && steps.run-test.conclusion == 'failure' }}
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ github.job }}-logs
+          path: test-network-k8s/network-debug.log
+
+  ccaas-external:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Test the network
+        id: run-test
+        working-directory: test-network-k8s
+        run: ../ci/scripts/run-k8s-test-network-basic.sh
+        env:
+          CLIENT_LANGUAGE: typescript
+          CHAINCODE_LANGUAGE: external
+      - name: Upload failure logs
+        if: ${{ failure() && steps.run-test.conclusion == 'failure' }}
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ github.job }}-logs
+          path: test-network-k8s/network-debug.log
+
+  k8s-builder:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Test the network
+        id: run-test
+        working-directory: test-network-k8s
+        run: ../ci/scripts/run-k8s-test-network-basic.sh
+        env:
+          CHAINCODE_NAME: basic
+          CHAINCODE_LANGUAGE: java
+          CHAINCODE_BUILDER: k8s
+      - name: Upload failure logs
+        if: ${{ failure() && steps.run-test.conclusion == 'failure' }}
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ github.job }}-logs
+          path: test-network-k8s/network-debug.log
+
+  multi-namespace:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Test the network
+        id: run-test
+        working-directory: test-network-k8s
+        run: ../ci/scripts/run-k8s-test-network-basic.sh
+        env:
+          ORG0_NS: org0-namespace
+          ORG1_NS: org1-namespace
+          ORG2_NS: org2-namespace
+          CHAINCODE_NAME: basic
+          CHAINCODE_LANGUAGE: java
+          CHAINCODE_BUILDER: k8s
+      - name: Upload failure logs
+        if: ${{ failure() && steps.run-test.conclusion == 'failure' }}
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ github.job }}-logs
+          path: test-network-k8s/network-debug.log
+
+  bft-orderer:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    # This job requires Fabric v3.0 or later, which is only supported on 'main'.
+    # Ensure it does not run on 'release-2.5' or earlier versions.
+    if: ${{ github.ref == 'refs/heads/main' || github.event.pull_request.base.ref == 'main' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Test the network
+        id: run-test
+        working-directory: test-network-k8s
+        run: ../ci/scripts/run-k8s-test-network-basic.sh
+        env:
+          CLIENT_LANGUAGE: typescript
+          CHAINCODE_LANGUAGE: java
+          # Note: The default Fabric version for CI is currently the latest LTS (v2.5.x).
+          # To test BFT Orderers, Fabric v3.x is explicitly specified here.
+          FABRIC_VERSION: '3.1'
+          ORDERER_TYPE: bft
+      - name: Upload failure logs
+        if: ${{ failure() && steps.run-test.conclusion == 'failure' }}
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ github.job }}-logs
+          path: test-network-k8s/network-debug.log

.github/workflows/test-network-ledger.yaml

@@ -0,0 +1,41 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network Ledger 🥑
+run-name: ${{ github.actor }} is running the Test Network Ledger tests 🥑
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  basic:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - javascript
+          - typescript
+        chaincode-name:
+          - ledger
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-ledger.sh
+        env:
+          CHAINCODE_NAME: ${{ matrix.chaincode-name }}
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}

.github/workflows/test-network-off-chain.yaml

@@ -0,0 +1,39 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network Off Chain 🍔
+run-name: ${{ github.actor }} is running the Test Network Off Chain tests 🍔
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  off-chain:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - javascript
+          - typescript
+          - java
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test Network Off Chain
+        working-directory: test-network
+        env:
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}
+        run: ../ci/scripts/run-test-network-off-chain.sh

.github/workflows/test-network-private.yaml

@@ -0,0 +1,41 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network Private 🔒
+run-name: ${{ github.actor }} is running the Test Network Private tests 🔒
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main", "release-2.5"]
+  pull_request:
+    branches: ["main", "release-2.5"]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  private:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+          - java
+          - typescript
+        chaincode-name:
+          - private
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-private.sh
+        env:
+          CHAINCODE_NAME: ${{ matrix.chaincode-name }}
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}

.github/workflows/test-network-sbe.yaml

@@ -0,0 +1,40 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network SBE 🎵
+run-name: ${{ github.actor }} is running the Test Network SBE tests 🎵
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  SBE:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - typescript
+          - java
+        chaincode-name:
+          - sbe
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-sbe.sh
+        env:
+          CHAINCODE_NAME: ${{ matrix.chaincode-name }}
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}

.github/workflows/test-network-secured.yaml

@@ -0,0 +1,39 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+name: Test Network Secured 🔔
+run-name: ${{ github.actor }} is running the Test Network Secured tests 🔔
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release-2.5" ]
+  pull_request:
+    branches: [ "main", "release-2.5" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  secured:
+    runs-on: ${{ github.repository == 'hyperledger/fabric-samples' && 'fabric-ubuntu-22.04' || 'ubuntu-22.04' }}
+    strategy:
+      matrix:
+        chaincode-language:
+          - go
+        chaincode-name:
+          - secured
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up the test network runtime
+        uses: ./.github/actions/test-network-setup
+
+      - name: Run Test
+        working-directory: test-network
+        run: ../ci/scripts/run-test-network-secured.sh
+        env:
+          CHAINCODE_NAME: ${{ matrix.chaincode-name }}
+          CHAINCODE_LANGUAGE: ${{ matrix.chaincode-language }}

.gitignore

@@ -4,26 +4,30 @@
 .#*
 # Vim file artifacts
 .*.sw*
-# installed platform-specific binaries
-/bin
 .DS_Store
 .project
+# omit Go vendor directories
+vendor/
+.vscode
+.gradle
+.idea
+# Dependency directories
+node_modules/
+# Ignore Gradle build output directory
+build
+# Ignore Maven build output directory
+target
 
-first-network/channel-artifacts/*.tx
-first-network/channel-artifacts/*.block
-first-network/crypto-config/*
+# Eclipse
+.classpath
+.settings
 
-chaincode-docker-devmode/myc.block
-chaincode-docker-devmode/chaincode/sacc/sacc
-chaincode-docker-devmode/chaincode/chaincode_example02/chaincode_example02
+# installed Fabric binaries etc.
+/bin/
+builders/
+config/
+external-chaincode/
+install-fabric.sh
 
-# fabric sdk node modules
-fabcar/node_modules/
-fabcar/package-lock.json
-fabcar/hfc-key-store/
-
-# balance transfer sample
-balance-transfer/.DS_Store
-balance-transfer/node_modules/*
-balance-transfer/package-lock.json
-balance-transfer/fabric-client-kv-org*
+# override the ignore of all config/ folders
+!full-stack-asset-transfer-guide/infrastructure/sample-network/config

CODEOWNERS

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
+
+# Fabric Samples Maintainers
+*	@hyperledger/fabric-samples-maintainers

CODE_OF_CONDUCT.md

@@ -1,10 +1,8 @@
-## Hyperledger Fabric Samples
+Code of Conduct Guidelines
+==========================
 
-fabric-preload.sh will preload all of the requisite docker images for Hyperledger Fabric and tag them
-with the 'latest' tag. Optionally, specify a specific version (e.g. 1.0.1). Default version is 1.0.0.
+Please review the Hyperledger [Code of
+Conduct](https://lf-hyperledger.atlassian.net/wiki/spaces/HYP/pages/19595281/Hyperledger+Code+of+Conduct)
+before participating. It is important that we keep things civil.
 
-```bash
-./fabric-preload.sh [version]
-```
-
-<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>
+<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.

CONTRIBUTING.md

@@ -0,0 +1,18 @@
+## Contributing
+
+We welcome contributions to the Hyperledger Fabric Project in many forms, and
+there's always plenty to do!
+
+Please visit the
+[contributors guide](http://hyperledger-fabric.readthedocs.io/en/latest/CONTRIBUTING.html) in the
+docs to learn how to make contributions to this exciting project.
+
+## Code of Conduct Guidelines <a name="conduct"></a>
+
+See our [Code of Conduct Guidelines](./CODE_OF_CONDUCT.md).
+
+## Maintainers <a name="maintainers"></a>
+
+Should you have any questions or concerns, please reach out to one of the project's [Maintainers](./MAINTAINERS.md).
+
+<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.

MAINTAINERS.md

@@ -1,5 +1,14 @@
-## Hyperledger Fabric Maintainers
+Maintainers
+===========
 
-[MAINTAINERS](http://hyperledger-fabric.readthedocs.io/en/latest/MAINTAINERS.html)
+fabric-samples uses a non-author code review policy, requiring a single approval from a non-author maintainer.
 
-<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>
+| Name                      | GitHub           | Discord ID       | email                               |
+|---------------------------|------------------|------------------|-------------------------------------|
+| Dave Enyeart              | denyeart         | Dave Enyeart     | enyeart@us.ibm.com                  |
+| Mark Lewis                | bestbeforetoday  | bestbeforetoday  | Mark.S.Lewis@outlook.com            |
+| Tatsuya Sato              | satota2          | satota2          | tatsuya.sato.so@hitachi.com         |
+
+Also: Please see the [Release Manager section](https://github.com/hyperledger/fabric/blob/main/MAINTAINERS.md)
+
+<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.

README.md

@@ -1,7 +1,73 @@
-## Hyperledger Fabric Samples
+[//]: # (SPDX-License-Identifier: CC-BY-4.0)
+
+# Hyperledger Fabric Samples
+
+You can use Fabric samples to get started working with Hyperledger Fabric, explore important Fabric features, and learn how to build applications that can interact with blockchain networks using the Fabric SDKs. To learn more about Hyperledger Fabric, visit the [Fabric documentation](https://hyperledger-fabric.readthedocs.io/en/latest).
+
+Note that this branch contains samples for the latest Fabric release. For older Fabric versions, refer to the corresponding branches:
+
+- [release-2.2](https://github.com/hyperledger/fabric-samples/tree/release-2.2)
+- [release-1.4](https://github.com/hyperledger/fabric-samples/tree/release-1.4)
+
+## Getting started with the Fabric samples
+
+To use the Fabric samples, you need to download the Fabric Docker images and the Fabric CLI tools. First, make sure that you have installed all of the [Fabric prerequisites](https://hyperledger-fabric.readthedocs.io/en/latest/prereqs.html). You can then follow the instructions to [Install the Fabric Samples, Binaries, and Docker Images](https://hyperledger-fabric.readthedocs.io/en/latest/install.html) in the Fabric documentation. In addition to downloading the Fabric images and tool binaries, the Fabric samples will also be cloned to your local machine.
+
+## Test network
+
+The [Fabric test network](test-network) in the samples repository provides a Docker Compose based test network with two
+Organization peers and an ordering service node. You can use it on your local machine to run the samples listed below.
+You can also use it to deploy and test your own Fabric chaincodes and applications. To get started, see
+the [test network tutorial](https://hyperledger-fabric.readthedocs.io/en/latest/test_network.html).
+
+The [Kubernetes Test Network](test-network-k8s) sample builds upon the Compose network, constructing a Fabric
+network with peer, orderer, and CA infrastructure nodes running on Kubernetes.  In addition to providing a sample
+Kubernetes guide, the Kube test network can be used as a platform to author and debug _cloud ready_ Fabric Client
+applications on a development or CI workstation.
+
+
+## Asset transfer samples and tutorials
+
+The asset transfer series provides a series of sample smart contracts and applications to demonstrate how to store and transfer assets using Hyperledger Fabric.
+Each sample and associated tutorial in the series demonstrates a different core capability in Hyperledger Fabric. The **Basic** sample provides an introduction on how
+to write smart contracts and how to interact with a Fabric network using the Fabric SDKs. The **Ledger queries**, **Private data**, and **State-based endorsement**
+samples demonstrate these additional capabilities. Finally, the **Secured agreement** sample demonstrates how to bring all the capabilities together to securely
+transfer an asset in a more realistic transfer scenario.
+
+|  **Smart Contract** | **Description** | **Tutorial** | **Smart contract languages** | **Application languages** |
+| -----------|------------------------------|----------|---------|---------|
+| [Basic](asset-transfer-basic) | The Basic sample smart contract that allows you to create and transfer an asset by putting data on the ledger and retrieving it. This sample is recommended for new Fabric users. | [Writing your first application](https://hyperledger-fabric.readthedocs.io/en/latest/write_first_app.html) | Go, JavaScript, TypeScript, Java | Go, TypeScript, Java |
+| [Ledger queries](asset-transfer-ledger-queries) | The ledger queries sample demonstrates range queries and transaction updates using range queries (applicable for both LevelDB and CouchDB state databases), and how to deploy an index with your chaincode to support JSON queries (applicable for CouchDB state database only). | [Using CouchDB](https://hyperledger-fabric.readthedocs.io/en/latest/couchdb_tutorial.html) | Go, JavaScript | Java, JavaScript |
+| [Private data](asset-transfer-private-data) | This sample demonstrates the use of private data collections, how to manage private data collections with the chaincode lifecycle, and how the private data hash can be used to verify private data on the ledger. It also demonstrates how to control asset updates and transfers using client-based ownership and access control. | [Using Private Data](https://hyperledger-fabric.readthedocs.io/en/latest/private_data_tutorial.html) | Go, TypeScript, Java | TypeScript |
+| [State-Based Endorsement](asset-transfer-sbe) | This sample demonstrates how to override the chaincode-level endorsement policy to set endorsement policies at the key-level (data/asset level). | [Using State-based endorsement](https://github.com/hyperledger/fabric-samples/tree/main/asset-transfer-sbe) | Java, TypeScript | JavaScript |
+| [Secured agreement](asset-transfer-secured-agreement) | Smart contract that uses implicit private data collections, state-based endorsement, and organization-based ownership and access control to keep data private and securely transfer an asset with the consent of both the current owner and buyer. | [Secured asset transfer](https://hyperledger-fabric.readthedocs.io/en/latest/secured_asset_transfer/secured_private_asset_transfer_tutorial.html)  | Go | TypeScript |
+| [Events](asset-transfer-events) | The events sample demonstrates how smart contracts can emit events that are read by the applications interacting with the network. | [README](asset-transfer-events/README.md)  | Go, JavaScript, Java | Go, TypeScript, Java |
+| [Attribute-based access control](asset-transfer-abac) | Demonstrates the use of attribute and identity based access control using a simple asset transfer scenario | [README](asset-transfer-abac/README.md)  | Go | _None_ |
+
+## Full stack asset transfer guide
+
+The [full stack asset transfer guide](full-stack-asset-transfer-guide#readme) workshop demonstrates how a generic asset transfer solution for Hyperledger Fabric can be developed and deployed. This covers chaincode development, client application development, and deployment to a production-like environment.
+
+## Additional samples
+
+Additional samples demonstrate various Fabric use cases and application patterns.
+
+|  **Sample** | **Description** | **Documentation** |
+| -------------|------------------------------|------------------|
+| [Off chain data](off_chain_data) | Learn how to use block events to build an off-chain database for reporting and analytics. | [Peer channel-based event services](https://hyperledger-fabric.readthedocs.io/en/latest/peer_event_services.html) |
+| [Token SDK](token-sdk) | Sample REST API around the Hyperledger Labs [Token SDK](https://github.com/hyperledger-labs/fabric-token-sdk) for privacy friendly (zero knowledge proof) UTXO transactions. | [README](token-sdk/README.md) |
+| [Token ERC-20](token-erc-20) | Smart contract demonstrating how to create and transfer fungible tokens using an account-based model. | [README](token-erc-20/README.md) |
+| [Token UTXO](token-utxo) | Smart contract demonstrating how to create and transfer fungible tokens using a UTXO (unspent transaction output) model. | [README](token-utxo/README.md) |
+| [Token ERC-1155](token-erc-1155) | Smart contract demonstrating how to create and transfer multiple tokens (both fungible and non-fungible) using an account based model. | [README](token-erc-1155/README.md) |
+| [Token ERC-721](token-erc-721) | Smart contract demonstrating how to create and transfer non-fungible tokens using an account-based model. | [README](token-erc-721/README.md) |
+| [High throughput](high-throughput) | Learn how you can design your smart contract to avoid transaction collisions in high volume environments. | [README](high-throughput/README.md) |
+| [Simple Auction](auction-simple) | Run an auction where bids are kept private until the auction is closed, after which users can reveal their bid. | [README](auction-simple/README.md) |
+| [Dutch Auction](auction-dutch) | Run an auction in which multiple items of the same type can be sold to more than one buyer. This example also includes the ability to add an auditor organization. | [README](auction-dutch/README.md) |
 
-Please visit the [installation instructions](http://hyperledger-fabric.readthedocs.io/en/latest/samples.html).
 
 ## License <a name="license"></a>
 
-Hyperledger Project source code files are made available under the Apache License, Version 2.0 (Apache-2.0), located in the [LICENSE](LICENSE) file. Hyperledger Project documentation files are made available under the Creative Commons Attribution 4.0 International License (CC-BY-4.0), available at http://creativecommons.org/licenses/by/4.0/.
+Hyperledger Project source code files are made available under the Apache
+License, Version 2.0 (Apache-2.0), located in the [LICENSE](LICENSE) file.
+Hyperledger Project documentation files are made available under the Creative
+Commons Attribution 4.0 International License (CC-BY-4.0), available at http://creativecommons.org/licenses/by/4.0/.

SECURITY.md

@@ -0,0 +1,11 @@
+# Hyperledger Security Policy
+
+## Reporting a Security Bug
+
+If you think you have discovered a security issue in any of the Hyperledger projects, we'd love to hear from you. We will take all security bugs seriously and if confirmed upon investigation we will patch it within a reasonable amount of time and release a public security bulletin discussing the impact and credit the discoverer.
+
+There are two ways to report a security bug. The easiest is to email a description of the flaw and any related information (e.g. reproduction steps, version) to [security at hyperledger dot org](mailto:security@hyperledger.org).
+
+The other way is to file a confidential security bug in the repository's [security advisories page](https://github.com/hyperledger/fabric/security/advisories). Guidance can be found in the GitHub documentation on [privately reporting a security vulnerability](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing/privately-reporting-a-security-vulnerability).
+
+The process by which the Hyperledger Security Team handles security bugs is documented further in our [Defect Response page](https://lf-hyperledger.atlassian.net/wiki/spaces/SEC/pages/20283618/Defect+Response) on our [wiki](https://lf-hyperledger.atlassian.net/wiki).

asset-transfer-abac/README.md

@@ -0,0 +1,173 @@
+# Attribute based access control
+
+The `asset-transfer-abac` sample demonstrates the use of Attribute-based access control within the context of a simple asset transfer scenario. The sample also uses authorization based on individual client identities to allow the users that interact with the network to own assets on the blockchain ledger.
+
+Attribute-Based Access Control (ABAC) refers to the ability to restrict access to certain functionality within a smart contract based on the attributes within a users certificate. For example, you may want certain functions within a smart contract to be used only by application administrators. ABAC allows organizations to provide elevated access to certain users without requiring those users be administrators of the network. For more information, see [Attribute-based access control](https://hyperledger-fabric-ca.readthedocs.io/en/latest/users-guide.html#attribute-based-access-control) in the Fabric CA users guide.
+
+The `asset-transfer-abac` smart contract allows you to create assets that can be updated or transferred by the asset owner. However, the ability to create or remove assets from the ledger is restricted to identities with the `abac.creator=true` attribute. The identity that creates the asset is assigned as the asset owner. Only the owner can transfer the asset to a new owner or update the asset properties. In the course of the tutorial, we will use the Fabric CA client to create identities with the attribute required to create a new asset. We will then transfer the asset to another identity and demonstrate how the `GetID()` function can be used to enforce asset ownership. We will then use the owner identity to delete the asset. Both Attribute based access control and the `GetID()` function are provided by the [Client Identity Chaincode Library](https://github.com/hyperledger/fabric-chaincode-go/blob/master/pkg/cid/README.md).
+
+## Start the network and deploy the smart contract
+
+We can use the Fabric test network to deploy and interact with the `asset-transfer-abac` smart contract. Run the following command to change into the test network directory and bring down any running nodes:
+```
+cd fabric-samples/test-network
+./network.sh down
+```
+
+Run the following command to deploy the test network using Certificate Authorities:
+```
+./network.sh up createChannel -ca
+```
+
+You can then use the test network script to deploy the `asset-transfer-abac` smart contract to a channel on the network:
+```
+./network.sh deployCC -ccn abac -ccp ../asset-transfer-abac/chaincode-go/ -ccl go
+```
+
+## Register identities with attributes
+
+We can use the one of the test network Certificate Authorities to register and enroll identities with the attribute of `abac.creator=true`. First, we need to set the following environment variables in order to use the Fabric CA client.
+```
+export PATH=${PWD}/../bin:${PWD}:$PATH
+export FABRIC_CFG_PATH=$PWD/../config/
+```
+
+We will create the identities using the Org1 CA. Set the Fabric CA client home to the MSP of the Org1 CA admin:
+```
+export FABRIC_CA_CLIENT_HOME=${PWD}/organizations/peerOrganizations/org1.example.com/
+```
+
+There are two ways to generate certificates with attributes added. We will use both methods and create two identities in the process. The first method is to specify that the attribute be added to the certificate by default when the identity is registered. The following command will register an identity named creator1 with the attribute of `abac.creator=true`.
+
+```
+fabric-ca-client register --id.name creator1 --id.secret creator1pw --id.type client --id.affiliation org1 --id.attrs 'abac.creator=true:ecert' --tls.certfiles "${PWD}/organizations/fabric-ca/org1/tls-cert.pem"
+```
+
+The `ecert` suffix adds the attribute to the certificate automatically when the identity is enrolled. As a result, the following enroll command will contain the attribute that was provided in the registration command.
+
+```
+fabric-ca-client enroll -u https://creator1:creator1pw@localhost:7054 --caname ca-org1 -M "${PWD}/organizations/peerOrganizations/org1.example.com/users/creator1@org1.example.com/msp" --tls.certfiles "${PWD}/organizations/fabric-ca/org1/tls-cert.pem"
+```
+
+Now that we have enrolled the identity, run the command below to copy the Node OU configuration file into the creator1 MSP folder.
+```
+cp "${PWD}/organizations/peerOrganizations/org1.example.com/msp/config.yaml" "${PWD}/organizations/peerOrganizations/org1.example.com/users/creator1@org1.example.com/msp/config.yaml"
+```
+
+The second method is to request that the attribute be added upon enrollment. The following command will register an identity named creator2 with the same `abac.creator` attribute.
+```
+fabric-ca-client register --id.name creator2 --id.secret creator2pw --id.type client --id.affiliation org1 --id.attrs 'abac.creator=true:' --tls.certfiles "${PWD}/organizations/fabric-ca/org1/tls-cert.pem"
+```
+
+The following enroll command will add the attribute to the certificate:
+
+```
+fabric-ca-client enroll -u https://creator2:creator2pw@localhost:7054 --caname ca-org1 --enrollment.attrs "abac.creator" -M "${PWD}/organizations/peerOrganizations/org1.example.com/users/creator2@org1.example.com/msp" --tls.certfiles "${PWD}/organizations/fabric-ca/org1/tls-cert.pem"
+```
+
+Run the command below to copy the Node OU configuration file into the creator2 MSP folder.
+```
+cp "${PWD}/organizations/peerOrganizations/org1.example.com/msp/config.yaml" "${PWD}/organizations/peerOrganizations/org1.example.com/users/creator2@org1.example.com/msp/config.yaml"
+```
+
+## Create an asset
+
+You can use either identity with the `abac.creator=true` attribute to create an asset using the `asset-transfer-abac` smart contract. We will set the following environment variables to use the first identity that was generated, creator1:
+
+```
+export CORE_PEER_TLS_ENABLED=true
+export CORE_PEER_LOCALMSPID=Org1MSP
+export CORE_PEER_MSPCONFIGPATH=${PWD}/organizations/peerOrganizations/org1.example.com/users/creator1@org1.example.com/msp
+export CORE_PEER_TLS_ROOTCERT_FILE=${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
+export CORE_PEER_ADDRESS=localhost:7051
+export TARGET_TLS_OPTIONS=(-o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt")
+```
+
+Run the following command to create Asset1:
+```
+peer chaincode invoke "${TARGET_TLS_OPTIONS[@]}" -C mychannel -n abac -c '{"function":"CreateAsset","Args":["Asset1","blue","20","100"]}'
+```
+
+You can use the command below to query the asset on the ledger:
+```
+peer chaincode query -C mychannel -n abac -c '{"function":"ReadAsset","Args":["Asset1"]}'
+```
+The result will list the creator1 identity as the asset owner. The `GetID()` API reads the name and issuer from the certificate of the identity that submitted the transaction and assigns that identity as the asset owner:
+```
+{"ID":"Asset1","color":"blue","size":20,"owner":"x509::CN=creator1,OU=client+OU=org1,O=Hyperledger,ST=North Carolina,C=US::CN=ca.org1.example.com,O=org1.example.com,L=Durham,ST=North Carolina,C=US","appraisedValue":100}
+```
+
+## Transfer the asset
+
+As the owner of Asset1, the creator1 identity has the ability to transfer the asset to another owner. In order to transfer the asset, the owner needs to provide the name and issuer of the new owner to the `TransferAsset` function. The `asset-transfer-abac` smart contract has a `GetSubmittingClientIdentity` function that allows users to retrieve their certificate information and provide it to the asset owner out of band (we omit this step). Issue the command below to transfer Asset1 to the user1 identity from Org1 that was created when the test network was deployed:
+```
+export RECIPIENT="x509::CN=user1,OU=client,O=Hyperledger,ST=North Carolina,C=US::CN=ca.org1.example.com,O=org1.example.com,L=Durham,ST=North Carolina,C=US"
+peer chaincode invoke "${TARGET_TLS_OPTIONS[@]}" -C mychannel -n abac -c '{"function":"TransferAsset","Args":["Asset1","'"$RECIPIENT"'"]}'
+```
+Query the ledger to verify that the asset has a new owner:
+```
+peer chaincode query -C mychannel -n abac -c '{"function":"ReadAsset","Args":["Asset1"]}'
+```
+We can see that Asset1 with is now owned by User1:
+```
+{"ID":"Asset1","color":"blue","size":20,"owner":"x509::CN=user1,OU=client,O=Hyperledger,ST=North Carolina,C=US::CN=ca.org1.example.com,O=org1.example.com,L=Durham,ST=North Carolina,C=US","appraisedValue":100}
+```
+
+## Update the asset
+
+Now that the asset has been transferred, the new owner can update the asset properties. The smart contract uses the `GetID()` API to ensure that the update is being submitted by the asset owner. To demonstrate the difference between identity and attribute based access control, lets try to update the asset using the creator1 identity first:
+```
+peer chaincode invoke "${TARGET_TLS_OPTIONS[@]}" -C mychannel -n abac -c '{"function":"UpdateAsset","Args":["Asset1","green","20","100"]}'
+```
+
+Even though creator1 can create new assets, the smart contract detects that the transaction was not submitted by the identity that owns the asset, user1. The command returns the following error:
+```
+Error: endorsement failure during invoke. response: status:500 message:"submitting client not authorized to update asset, does not own asset"
+```
+
+Run the following command to operate as the asset owner by setting the MSP path to User1:
+```
+export CORE_PEER_MSPCONFIGPATH=${PWD}/organizations/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp
+```
+
+We can now update the asset. Run the following command to change the asset color from blue to green. All other aspects of the asset will remain unchanged.
+```
+peer chaincode invoke "${TARGET_TLS_OPTIONS[@]}" -C mychannel -n abac -c '{"function":"UpdateAsset","Args":["Asset1","green","20","100"]}'
+```
+Run the query command again to verify that the asset has changed color:
+```
+peer chaincode query -C mychannel -n abac -c '{"function":"ReadAsset","Args":["Asset1"]}'
+```
+The result will display that Asset1 is now green:
+```
+{"ID":"Asset1","color":"green","size":20,"owner":"x509::CN=user1,OU=client,O=Hyperledger,ST=North Carolina,C=US::CN=ca.org1.example.com,O=org1.example.com,L=Durham,ST=North Carolina,C=US","appraisedValue":100}
+```
+
+## Delete the asset
+
+The owner also has the ability to delete the asset. Run the following command to remove Asset1 from the ledger:
+```
+peer chaincode invoke "${TARGET_TLS_OPTIONS[@]}" -C mychannel -n abac -c '{"function":"DeleteAsset","Args":["Asset1"]}'
+```
+
+If you query the ledger once more, you will see that Asset1 no longer exists:
+```
+peer chaincode query -C mychannel -n abac -c '{"function":"ReadAsset","Args":["Asset1"]}'
+```
+
+While we are operating as User1, we can demonstrate attribute based access control by trying to create an asset using an identity without the `abac.creator=true` attribute. Run the following command to try to create Asset1 as User1:
+```
+peer chaincode invoke "${TARGET_TLS_OPTIONS[@]}" -C mychannel -n abac -c '{"function":"CreateAsset","Args":["Asset2","red","20","100"]}'
+```
+
+The smart contract will return the following error:
+```
+Error: endorsement failure during invoke. response: status:500 message:"submitting client not authorized to create asset, does not have abac.creator role"
+```
+
+## Clean up
+
+When you are finished, you can run the following command to bring down the test network:
+```
+./network.sh down
+```

asset-transfer-abac/chaincode-go/go.mod

@@ -0,0 +1,26 @@
+module github.com/hyperledger/fabric-samples/asset-transfer-abac/chaincode-go
+
+go 1.23.0
+
+require github.com/hyperledger/fabric-contract-api-go/v2 v2.2.0
+
+require (
+	github.com/go-openapi/jsonpointer v0.21.0 // indirect
+	github.com/go-openapi/jsonreference v0.21.0 // indirect
+	github.com/go-openapi/spec v0.21.0 // indirect
+	github.com/go-openapi/swag v0.23.0 // indirect
+	github.com/hyperledger/fabric-chaincode-go/v2 v2.0.0 // indirect
+	github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
+	golang.org/x/net v0.38.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
+	google.golang.org/grpc v1.71.0 // indirect
+	google.golang.org/protobuf v1.36.4 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

asset-transfer-abac/chaincode-go/go.sum

@@ -0,0 +1,81 @@
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+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

asset-transfer-abac/chaincode-go/smart-contract/abac.go

@@ -0,0 +1,214 @@
+package abac
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+
+	"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
+)
+
+// SmartContract provides functions for managing an Asset
+type SmartContract struct {
+	contractapi.Contract
+}
+
+// Asset describes basic details of what makes up a simple asset
+type Asset struct {
+	ID             string `json:"ID"`
+	Color          string `json:"color"`
+	Size           int    `json:"size"`
+	Owner          string `json:"owner"`
+	AppraisedValue int    `json:"appraisedValue"`
+}
+
+// CreateAsset issues a new asset to the world state with given details.
+func (s *SmartContract) CreateAsset(ctx contractapi.TransactionContextInterface, id string, color string, size int, appraisedValue int) error {
+
+	// Demonstrate the use of Attribute-Based Access Control (ABAC) by checking
+	// to see if the caller has the "abac.creator" attribute with a value of true;
+	// if not, return an error.
+
+	err := ctx.GetClientIdentity().AssertAttributeValue("abac.creator", "true")
+	if err != nil {
+		return fmt.Errorf("submitting client not authorized to create asset, does not have abac.creator role")
+	}
+
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if exists {
+		return fmt.Errorf("the asset %s already exists", id)
+	}
+
+	// Get ID of submitting client identity
+	clientID, err := s.GetSubmittingClientIdentity(ctx)
+	if err != nil {
+		return err
+	}
+
+	asset := Asset{
+		ID:             id,
+		Color:          color,
+		Size:           size,
+		Owner:          clientID,
+		AppraisedValue: appraisedValue,
+	}
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// UpdateAsset updates an existing asset in the world state with provided parameters.
+func (s *SmartContract) UpdateAsset(ctx contractapi.TransactionContextInterface, id string, newColor string, newSize int, newValue int) error {
+
+	asset, err := s.ReadAsset(ctx, id)
+	if err != nil {
+		return err
+	}
+
+	clientID, err := s.GetSubmittingClientIdentity(ctx)
+	if err != nil {
+		return err
+	}
+
+	if clientID != asset.Owner {
+		return fmt.Errorf("submitting client not authorized to update asset, does not own asset")
+	}
+
+	asset.Color = newColor
+	asset.Size = newSize
+	asset.AppraisedValue = newValue
+
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// DeleteAsset deletes a given asset from the world state.
+func (s *SmartContract) DeleteAsset(ctx contractapi.TransactionContextInterface, id string) error {
+
+	asset, err := s.ReadAsset(ctx, id)
+	if err != nil {
+		return err
+	}
+
+	clientID, err := s.GetSubmittingClientIdentity(ctx)
+	if err != nil {
+		return err
+	}
+
+	if clientID != asset.Owner {
+		return fmt.Errorf("submitting client not authorized to update asset, does not own asset")
+	}
+
+	return ctx.GetStub().DelState(id)
+}
+
+// TransferAsset updates the owner field of asset with given id in world state.
+func (s *SmartContract) TransferAsset(ctx contractapi.TransactionContextInterface, id string, newOwner string) error {
+
+	asset, err := s.ReadAsset(ctx, id)
+	if err != nil {
+		return err
+	}
+
+	clientID, err := s.GetSubmittingClientIdentity(ctx)
+	if err != nil {
+		return err
+	}
+
+	if clientID != asset.Owner {
+		return fmt.Errorf("submitting client not authorized to update asset, does not own asset")
+	}
+
+	asset.Owner = newOwner
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// ReadAsset returns the asset stored in the world state with given id.
+func (s *SmartContract) ReadAsset(ctx contractapi.TransactionContextInterface, id string) (*Asset, error) {
+
+	assetJSON, err := ctx.GetStub().GetState(id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read from world state: %v", err)
+	}
+	if assetJSON == nil {
+		return nil, fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	var asset Asset
+	err = json.Unmarshal(assetJSON, &asset)
+	if err != nil {
+		return nil, err
+	}
+
+	return &asset, nil
+}
+
+// GetAllAssets returns all assets found in world state
+func (s *SmartContract) GetAllAssets(ctx contractapi.TransactionContextInterface) ([]*Asset, error) {
+	// range query with empty string for startKey and endKey does an
+	// open-ended query of all assets in the chaincode namespace.
+	resultsIterator, err := ctx.GetStub().GetStateByRange("", "")
+	if err != nil {
+		return nil, err
+	}
+	defer resultsIterator.Close()
+
+	var assets []*Asset
+	for resultsIterator.HasNext() {
+		queryResponse, err := resultsIterator.Next()
+		if err != nil {
+			return nil, err
+		}
+
+		var asset Asset
+		err = json.Unmarshal(queryResponse.Value, &asset)
+		if err != nil {
+			return nil, err
+		}
+		assets = append(assets, &asset)
+	}
+
+	return assets, nil
+}
+
+// AssetExists returns true when asset with given ID exists in world state
+func (s *SmartContract) AssetExists(ctx contractapi.TransactionContextInterface, id string) (bool, error) {
+
+	assetJSON, err := ctx.GetStub().GetState(id)
+	if err != nil {
+		return false, fmt.Errorf("failed to read from world state: %v", err)
+	}
+
+	return assetJSON != nil, nil
+}
+
+// GetSubmittingClientIdentity returns the name and issuer of the identity that
+// invokes the smart contract. This function base64 decodes the identity string
+// before returning the value to the client or smart contract.
+func (s *SmartContract) GetSubmittingClientIdentity(ctx contractapi.TransactionContextInterface) (string, error) {
+
+	b64ID, err := ctx.GetClientIdentity().GetID()
+	if err != nil {
+		return "", fmt.Errorf("Failed to read clientID: %v", err)
+	}
+	decodeID, err := base64.StdEncoding.DecodeString(b64ID)
+	if err != nil {
+		return "", fmt.Errorf("failed to base64 decode clientID: %v", err)
+	}
+	return string(decodeID), nil
+}

asset-transfer-abac/chaincode-go/smartContract.go

@@ -0,0 +1,23 @@
+/*
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package main
+
+import (
+	"log"
+
+	"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
+	abac "github.com/hyperledger/fabric-samples/asset-transfer-abac/chaincode-go/smart-contract"
+)
+
+func main() {
+	abacSmartContract, err := contractapi.NewChaincode(&abac.SmartContract{})
+	if err != nil {
+		log.Panicf("Error creating abac chaincode: %v", err)
+	}
+
+	if err := abacSmartContract.Start(); err != nil {
+		log.Panicf("Error starting abac chaincode: %v", err)
+	}
+}

asset-transfer-basic/.gitignore

@@ -0,0 +1,2 @@
+wallet
+!wallet/.gitkeep

asset-transfer-basic/README.md

@@ -0,0 +1,107 @@
+# Asset transfer basic sample
+
+The asset transfer basic sample demonstrates:
+
+- Connecting a client application to a Fabric blockchain network.
+- Submitting smart contract transactions to update ledger state.
+- Evaluating smart contract transactions to query ledger state.
+- Handling errors in transaction invocation.
+
+## About the sample
+
+This sample includes smart contract and application code in multiple languages. This sample shows create, read, update, transfer and delete of an asset.
+
+For a more detailed walk-through of the application code and client API usage, refer to the [Running a Fabric Application tutorial](https://hyperledger-fabric.readthedocs.io/en/latest/write_first_app.html) in the main Hyperledger Fabric documentation.
+
+### Application
+
+Follow the execution flow in the client application code, and corresponding output on running the application. Pay attention to the sequence of:
+
+- Transaction invocations (console output like "**--> Submit Transaction**" and "**--> Evaluate Transaction**").
+- Results returned by transactions (console output like "**\*\*\* Result**").
+
+### Smart Contract
+
+The smart contract (in folder `chaincode-xyz`) implements the following functions to support the application:
+
+- CreateAsset
+- ReadAsset
+- UpdateAsset
+- DeleteAsset
+- TransferAsset
+
+Note that the asset transfer implemented by the smart contract is a simplified scenario, without ownership validation, meant only to demonstrate how to invoke transactions.
+
+## Running the sample
+
+The Fabric test network is used to deploy and run this sample. Follow these steps in order:
+
+1. Create the test network and a channel (from the `test-network` folder).
+
+   ```
+   ./network.sh up createChannel -c mychannel -ca
+   ```
+
+1. Deploy one of the smart contract implementations (from the `test-network` folder).
+
+   - To deploy the **TypeScript** chaincode implementation:
+
+     ```shell
+     ./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-typescript/ -ccl typescript
+     ```
+
+   - To deploy the **JavaScript** chaincode implementation:
+
+     ```shell
+     ./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-javascript/ -ccl javascript
+     ```
+
+   - To deploy the **Go** chaincode implementation:
+
+     ```shell
+     ./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-go/ -ccl go
+     ```
+
+   - To deploy the **Java** chaincode implementation:
+     ```shell
+     ./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-java/ -ccl java
+     ```
+
+1. Run the application (from the `asset-transfer-basic` folder).
+
+   - To run the **TypeScript** sample application:
+
+     ```shell
+     cd application-gateway-typescript
+     npm install
+     npm start
+     ```
+
+   - To run the **JavaScript** sample application:
+
+     ```shell
+     cd application-gateway-javascript
+     npm install
+     npm start
+     ```
+
+   - To run the **Go** sample application:
+
+     ```shell
+     cd application-gateway-go
+     go run .
+     ```
+
+   - To run the **Java** sample application:
+     ```shell
+     cd application-gateway-java
+     ./gradlew run
+     ```
+
+## Clean up
+
+When you are finished, you can bring down the test network (from the `test-network` folder). The command will remove all the nodes of the test network, and delete any ledger data that you created.
+
+```shell
+./network.sh down
+```

asset-transfer-basic/application-gateway-go/assetTransfer.go

@@ -0,0 +1,275 @@
+/*
+Copyright 2021 IBM All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package main
+
+import (
+	"bytes"
+	"context"
+	"crypto/x509"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path"
+	"time"
+
+	"github.com/hyperledger/fabric-gateway/pkg/client"
+	"github.com/hyperledger/fabric-gateway/pkg/hash"
+	"github.com/hyperledger/fabric-gateway/pkg/identity"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/status"
+)
+
+const (
+	mspID        = "Org1MSP"
+	cryptoPath   = "../../test-network/organizations/peerOrganizations/org1.example.com"
+	certPath     = cryptoPath + "/users/User1@org1.example.com/msp/signcerts"
+	keyPath      = cryptoPath + "/users/User1@org1.example.com/msp/keystore"
+	tlsCertPath  = cryptoPath + "/peers/peer0.org1.example.com/tls/ca.crt"
+	peerEndpoint = "dns:///localhost:7051"
+	gatewayPeer  = "peer0.org1.example.com"
+)
+
+var now = time.Now()
+var assetId = fmt.Sprintf("asset%d", now.Unix()*1e3+int64(now.Nanosecond())/1e6)
+
+func main() {
+	// The gRPC client connection should be shared by all Gateway connections to this endpoint
+	clientConnection := newGrpcConnection()
+	defer clientConnection.Close()
+
+	id := newIdentity()
+	sign := newSign()
+
+	// Create a Gateway connection for a specific client identity
+	gw, err := client.Connect(
+		id,
+		client.WithSign(sign),
+		client.WithHash(hash.SHA256),
+		client.WithClientConnection(clientConnection),
+		// Default timeouts for different gRPC calls
+		client.WithEvaluateTimeout(5*time.Second),
+		client.WithEndorseTimeout(15*time.Second),
+		client.WithSubmitTimeout(5*time.Second),
+		client.WithCommitStatusTimeout(1*time.Minute),
+	)
+	if err != nil {
+		panic(err)
+	}
+	defer gw.Close()
+
+	// Override default values for chaincode and channel name as they may differ in testing contexts.
+	chaincodeName := "basic"
+	if ccname := os.Getenv("CHAINCODE_NAME"); ccname != "" {
+		chaincodeName = ccname
+	}
+
+	channelName := "mychannel"
+	if cname := os.Getenv("CHANNEL_NAME"); cname != "" {
+		channelName = cname
+	}
+
+	network := gw.GetNetwork(channelName)
+	contract := network.GetContract(chaincodeName)
+
+	initLedger(contract)
+	getAllAssets(contract)
+	createAsset(contract)
+	readAssetByID(contract)
+	transferAssetAsync(contract)
+	exampleErrorHandling(contract)
+}
+
+// newGrpcConnection creates a gRPC connection to the Gateway server.
+func newGrpcConnection() *grpc.ClientConn {
+	certificatePEM, err := os.ReadFile(tlsCertPath)
+	if err != nil {
+		panic(fmt.Errorf("failed to read TLS certifcate file: %w", err))
+	}
+
+	certificate, err := identity.CertificateFromPEM(certificatePEM)
+	if err != nil {
+		panic(err)
+	}
+
+	certPool := x509.NewCertPool()
+	certPool.AddCert(certificate)
+	transportCredentials := credentials.NewClientTLSFromCert(certPool, gatewayPeer)
+
+	connection, err := grpc.NewClient(peerEndpoint, grpc.WithTransportCredentials(transportCredentials))
+	if err != nil {
+		panic(fmt.Errorf("failed to create gRPC connection: %w", err))
+	}
+
+	return connection
+}
+
+// newIdentity creates a client identity for this Gateway connection using an X.509 certificate.
+func newIdentity() *identity.X509Identity {
+	certificatePEM, err := readFirstFile(certPath)
+	if err != nil {
+		panic(fmt.Errorf("failed to read certificate file: %w", err))
+	}
+
+	certificate, err := identity.CertificateFromPEM(certificatePEM)
+	if err != nil {
+		panic(err)
+	}
+
+	id, err := identity.NewX509Identity(mspID, certificate)
+	if err != nil {
+		panic(err)
+	}
+
+	return id
+}
+
+// newSign creates a function that generates a digital signature from a message digest using a private key.
+func newSign() identity.Sign {
+	privateKeyPEM, err := readFirstFile(keyPath)
+	if err != nil {
+		panic(fmt.Errorf("failed to read private key file: %w", err))
+	}
+
+	privateKey, err := identity.PrivateKeyFromPEM(privateKeyPEM)
+	if err != nil {
+		panic(err)
+	}
+
+	sign, err := identity.NewPrivateKeySign(privateKey)
+	if err != nil {
+		panic(err)
+	}
+
+	return sign
+}
+
+func readFirstFile(dirPath string) ([]byte, error) {
+	dir, err := os.Open(dirPath)
+	if err != nil {
+		return nil, err
+	}
+
+	fileNames, err := dir.Readdirnames(1)
+	if err != nil {
+		return nil, err
+	}
+
+	return os.ReadFile(path.Join(dirPath, fileNames[0]))
+}
+
+// This type of transaction would typically only be run once by an application the first time it was started after its
+// initial deployment. A new version of the chaincode deployed later would likely not need to run an "init" function.
+func initLedger(contract *client.Contract) {
+	fmt.Printf("\n--> Submit Transaction: InitLedger, function creates the initial set of assets on the ledger \n")
+
+	_, err := contract.SubmitTransaction("InitLedger")
+	if err != nil {
+		panic(fmt.Errorf("failed to submit transaction: %w", err))
+	}
+
+	fmt.Printf("*** Transaction committed successfully\n")
+}
+
+// Evaluate a transaction to query ledger state.
+func getAllAssets(contract *client.Contract) {
+	fmt.Println("\n--> Evaluate Transaction: GetAllAssets, function returns all the current assets on the ledger")
+
+	evaluateResult, err := contract.EvaluateTransaction("GetAllAssets")
+	if err != nil {
+		panic(fmt.Errorf("failed to evaluate transaction: %w", err))
+	}
+	result := formatJSON(evaluateResult)
+
+	fmt.Printf("*** Result:%s\n", result)
+}
+
+// Submit a transaction synchronously, blocking until it has been committed to the ledger.
+func createAsset(contract *client.Contract) {
+	fmt.Printf("\n--> Submit Transaction: CreateAsset, creates new asset with ID, Color, Size, Owner and AppraisedValue arguments \n")
+
+	_, err := contract.SubmitTransaction("CreateAsset", assetId, "yellow", "5", "Tom", "1300")
+	if err != nil {
+		panic(fmt.Errorf("failed to submit transaction: %w", err))
+	}
+
+	fmt.Printf("*** Transaction committed successfully\n")
+}
+
+// Evaluate a transaction by assetID to query ledger state.
+func readAssetByID(contract *client.Contract) {
+	fmt.Printf("\n--> Evaluate Transaction: ReadAsset, function returns asset attributes\n")
+
+	evaluateResult, err := contract.EvaluateTransaction("ReadAsset", assetId)
+	if err != nil {
+		panic(fmt.Errorf("failed to evaluate transaction: %w", err))
+	}
+	result := formatJSON(evaluateResult)
+
+	fmt.Printf("*** Result:%s\n", result)
+}
+
+// Submit transaction asynchronously, blocking until the transaction has been sent to the orderer, and allowing
+// this thread to process the chaincode response (e.g. update a UI) without waiting for the commit notification
+func transferAssetAsync(contract *client.Contract) {
+	fmt.Printf("\n--> Async Submit Transaction: TransferAsset, updates existing asset owner")
+
+	submitResult, commit, err := contract.SubmitAsync("TransferAsset", client.WithArguments(assetId, "Mark"))
+	if err != nil {
+		panic(fmt.Errorf("failed to submit transaction asynchronously: %w", err))
+	}
+
+	fmt.Printf("\n*** Successfully submitted transaction to transfer ownership from %s to Mark. \n", string(submitResult))
+	fmt.Println("*** Waiting for transaction commit.")
+
+	if commitStatus, err := commit.Status(); err != nil {
+		panic(fmt.Errorf("failed to get commit status: %w", err))
+	} else if !commitStatus.Successful {
+		panic(fmt.Errorf("transaction %s failed to commit with status: %d", commitStatus.TransactionID, int32(commitStatus.Code)))
+	}
+
+	fmt.Printf("*** Transaction committed successfully\n")
+}
+
+// Submit transaction, passing in the wrong number of arguments ,expected to throw an error containing details of any error responses from the smart contract.
+func exampleErrorHandling(contract *client.Contract) {
+	fmt.Println("\n--> Submit Transaction: UpdateAsset asset70, asset70 does not exist and should return an error")
+
+	_, err := contract.SubmitTransaction("UpdateAsset", "asset70", "blue", "5", "Tomoko", "300")
+	if err == nil {
+		panic("******** FAILED to return an error")
+	}
+
+	fmt.Println("*** Successfully caught the error:")
+
+	var commitStatusErr *client.CommitStatusError
+	var transactionErr *client.TransactionError
+
+	if errors.As(err, &commitStatusErr) {
+		if errors.Is(err, context.DeadlineExceeded) {
+			fmt.Printf("Timeout waiting for transaction %s commit status: %s\n", commitStatusErr.TransactionID, commitStatusErr)
+		} else {
+			fmt.Printf("Error obtaining commit status for transaction %s with gRPC status %v: %s\n", commitStatusErr.TransactionID, status.Code(commitStatusErr), commitStatusErr)
+		}
+	} else if errors.As(err, &transactionErr) {
+		// The error could be an EndorseError, SubmitError or CommitError.
+		fmt.Println(err)
+		fmt.Printf("TransactionID: %s\n", transactionErr.TransactionID)
+	} else {
+		panic(fmt.Errorf("unexpected error type %T: %w", err, err))
+	}
+}
+
+// Format JSON data
+func formatJSON(data []byte) string {
+	var prettyJSON bytes.Buffer
+	if err := json.Indent(&prettyJSON, data, "", "  "); err != nil {
+		panic(fmt.Errorf("failed to parse JSON: %w", err))
+	}
+	return prettyJSON.String()
+}

asset-transfer-basic/application-gateway-go/go.mod

@@ -0,0 +1,18 @@
+module assetTransfer
+
+go 1.24.0
+
+require (
+	github.com/hyperledger/fabric-gateway v1.10.0
+	google.golang.org/grpc v1.76.0
+)
+
+require (
+	github.com/hyperledger/fabric-protos-go-apiv2 v0.3.7 // indirect
+	github.com/miekg/pkcs11 v1.1.1 // indirect
+	golang.org/x/net v0.42.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250804133106-a7a43d27e69b // indirect
+	google.golang.org/protobuf v1.36.10 // indirect
+)

asset-transfer-basic/application-gateway-go/go.sum

@@ -0,0 +1,52 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
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asset-transfer-basic/application-gateway-java/build.gradle

@@ -0,0 +1,37 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java project to get you started.
+ * For more details take a look at the Java Quickstart chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/6.5/userguide/tutorial_java_projects.html
+ */
+plugins {
+    // Apply the application plugin to add support for building a CLI application.
+    id 'application'
+}
+
+ext {
+    javaMainClass = "application.java.App"
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.hyperledger.fabric:fabric-gateway:1.10.0'
+    implementation platform('com.google.protobuf:protobuf-bom:4.33.0')
+    implementation platform('io.grpc:grpc-bom:1.76.0')
+    compileOnly 'io.grpc:grpc-api'
+    runtimeOnly 'io.grpc:grpc-netty-shaded'
+    implementation 'com.google.code.gson:gson:2.13.2'
+}
+
+compileJava {
+    options.release = 11
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = 'App'
+}

asset-transfer-basic/application-gateway-java/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

asset-transfer-basic/application-gateway-java/gradlew

@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

asset-transfer-basic/application-gateway-java/gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

asset-transfer-basic/application-gateway-java/pom.xml

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.hyperledger.fabric.example</groupId>
+    <artifactId>asset-transfer-basic</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.release>11</maven.compiler.release>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>com.google.protobuf</groupId>
+                <artifactId>protobuf-bom</artifactId>
+                <version>4.33.0</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>io.grpc</groupId>
+                <artifactId>grpc-bom</artifactId>
+                <version>1.76.0</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.hyperledger.fabric</groupId>
+            <artifactId>fabric-gateway</artifactId>
+            <version>1.10.0</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-netty-shaded</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be
+            moved to parent pom) -->
+            <plugins>
+                <!-- clean lifecycle, see
+                https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+                <plugin>
+                    <artifactId>maven-clean-plugin</artifactId>
+                    <version>3.4.0</version>
+                </plugin>
+                <!-- default lifecycle, jar packaging: see
+                https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+                <plugin>
+                    <artifactId>maven-resources-plugin</artifactId>
+                    <version>3.3.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>3.13.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>3.3.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>3.4.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-install-plugin</artifactId>
+                    <version>3.1.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>3.1.2</version>
+                </plugin>
+                <!-- site lifecycle, see
+                https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+                <plugin>
+                    <artifactId>maven-site-plugin</artifactId>
+                    <version>3.12.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-project-info-reports-plugin</artifactId>
+                    <version>3.6.1</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+</project>

asset-transfer-basic/application-gateway-java/settings.gradle

@@ -0,0 +1,10 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ *
+ * Detailed information about configuring a multi-project build in Gradle can be found
+ * in the user manual at https://docs.gradle.org/6.5/userguide/multi_project_builds.html
+ */
+
+rootProject.name = 'asset-transfer-basic'

asset-transfer-basic/application-gateway-java/src/main/java/App.java

@@ -0,0 +1,244 @@
+/*
+ * Copyright IBM Corp. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParser;
+import io.grpc.Grpc;
+import io.grpc.ManagedChannel;
+import io.grpc.TlsChannelCredentials;
+import org.hyperledger.fabric.client.CommitException;
+import org.hyperledger.fabric.client.CommitStatusException;
+import org.hyperledger.fabric.client.Contract;
+import org.hyperledger.fabric.client.EndorseException;
+import org.hyperledger.fabric.client.Gateway;
+import org.hyperledger.fabric.client.GatewayException;
+import org.hyperledger.fabric.client.Hash;
+import org.hyperledger.fabric.client.SubmitException;
+import org.hyperledger.fabric.client.identity.Identities;
+import org.hyperledger.fabric.client.identity.Identity;
+import org.hyperledger.fabric.client.identity.Signer;
+import org.hyperledger.fabric.client.identity.Signers;
+import org.hyperledger.fabric.client.identity.X509Identity;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.security.InvalidKeyException;
+import java.security.cert.CertificateException;
+import java.time.Instant;
+import java.util.concurrent.TimeUnit;
+
+public final class App {
+	private static final String MSP_ID = System.getenv().getOrDefault("MSP_ID", "Org1MSP");
+	private static final String CHANNEL_NAME = System.getenv().getOrDefault("CHANNEL_NAME", "mychannel");
+	private static final String CHAINCODE_NAME = System.getenv().getOrDefault("CHAINCODE_NAME", "basic");
+
+	// Path to crypto materials.
+	private static final Path CRYPTO_PATH = Paths.get("../../test-network/organizations/peerOrganizations/org1.example.com");
+	// Path to user certificate.
+	private static final Path CERT_DIR_PATH = CRYPTO_PATH.resolve(Paths.get("users/User1@org1.example.com/msp/signcerts"));
+	// Path to user private key directory.
+	private static final Path KEY_DIR_PATH = CRYPTO_PATH.resolve(Paths.get("users/User1@org1.example.com/msp/keystore"));
+	// Path to peer tls certificate.
+	private static final Path TLS_CERT_PATH = CRYPTO_PATH.resolve(Paths.get("peers/peer0.org1.example.com/tls/ca.crt"));
+
+	// Gateway peer end point.
+	private static final String PEER_ENDPOINT = "localhost:7051";
+	private static final String OVERRIDE_AUTH = "peer0.org1.example.com";
+
+	private final Contract contract;
+	private final String assetId = "asset" + Instant.now().toEpochMilli();
+	private final Gson gson = new GsonBuilder().setPrettyPrinting().create();
+
+	public static void main(final String[] args) throws Exception {
+		// The gRPC client connection should be shared by all Gateway connections to
+		// this endpoint.
+		var channel = newGrpcConnection();
+
+		var builder = Gateway.newInstance()
+                .identity(newIdentity())
+                .signer(newSigner())
+                .hash(Hash.SHA256)
+                .connection(channel)
+				// Default timeouts for different gRPC calls
+				.evaluateOptions(options -> options.withDeadlineAfter(5, TimeUnit.SECONDS))
+				.endorseOptions(options -> options.withDeadlineAfter(15, TimeUnit.SECONDS))
+				.submitOptions(options -> options.withDeadlineAfter(5, TimeUnit.SECONDS))
+				.commitStatusOptions(options -> options.withDeadlineAfter(1, TimeUnit.MINUTES));
+
+		try (var gateway = builder.connect()) {
+			new App(gateway).run();
+		} finally {
+			channel.shutdownNow().awaitTermination(5, TimeUnit.SECONDS);
+		}
+	}
+
+	private static ManagedChannel newGrpcConnection() throws IOException {
+		var credentials = TlsChannelCredentials.newBuilder()
+				.trustManager(TLS_CERT_PATH.toFile())
+				.build();
+		return Grpc.newChannelBuilder(PEER_ENDPOINT, credentials)
+				.overrideAuthority(OVERRIDE_AUTH)
+				.build();
+	}
+
+	private static Identity newIdentity() throws IOException, CertificateException {
+		try (var certReader = Files.newBufferedReader(getFirstFilePath(CERT_DIR_PATH))) {
+			var certificate = Identities.readX509Certificate(certReader);
+			return new X509Identity(MSP_ID, certificate);
+		}
+	}
+
+	private static Signer newSigner() throws IOException, InvalidKeyException {
+		try (var keyReader = Files.newBufferedReader(getFirstFilePath(KEY_DIR_PATH))) {
+			var privateKey = Identities.readPrivateKey(keyReader);
+			return Signers.newPrivateKeySigner(privateKey);
+		}
+	}
+
+	private static Path getFirstFilePath(Path dirPath) throws IOException {
+		try (var keyFiles = Files.list(dirPath)) {
+			return keyFiles.findFirst().orElseThrow();
+		}
+	}
+
+	public App(final Gateway gateway) {
+		// Get a network instance representing the channel where the smart contract is
+		// deployed.
+		var network = gateway.getNetwork(CHANNEL_NAME);
+
+		// Get the smart contract from the network.
+		contract = network.getContract(CHAINCODE_NAME);
+	}
+
+	public void run() throws GatewayException, CommitException {
+		// Initialize a set of asset data on the ledger using the chaincode 'InitLedger' function.
+		initLedger();
+
+		// Return all the current assets on the ledger.
+		getAllAssets();
+
+		// Create a new asset on the ledger.
+		createAsset();
+
+		// Update an existing asset asynchronously.
+		transferAssetAsync();
+
+		// Get the asset details by assetID.
+		readAssetById();
+
+		// Update an asset which does not exist.
+		updateNonExistentAsset();
+	}
+
+	/**
+	 * This type of transaction would typically only be run once by an application
+	 * the first time it was started after its initial deployment. A new version of
+	 * the chaincode deployed later would likely not need to run an "init" function.
+	 */
+	private void initLedger() throws EndorseException, SubmitException, CommitStatusException, CommitException {
+		System.out.println("\n--> Submit Transaction: InitLedger, function creates the initial set of assets on the ledger");
+
+		contract.submitTransaction("InitLedger");
+
+		System.out.println("*** Transaction committed successfully");
+	}
+
+	/**
+	 * Evaluate a transaction to query ledger state.
+	 */
+	private void getAllAssets() throws GatewayException {
+		System.out.println("\n--> Evaluate Transaction: GetAllAssets, function returns all the current assets on the ledger");
+
+		var result = contract.evaluateTransaction("GetAllAssets");
+
+		System.out.println("*** Result: " + prettyJson(result));
+	}
+
+	private String prettyJson(final byte[] json) {
+		return prettyJson(new String(json, StandardCharsets.UTF_8));
+	}
+
+	private String prettyJson(final String json) {
+		var parsedJson = JsonParser.parseString(json);
+		return gson.toJson(parsedJson);
+	}
+
+	/**
+	 * Submit a transaction synchronously, blocking until it has been committed to
+	 * the ledger.
+	 */
+	private void createAsset() throws EndorseException, SubmitException, CommitStatusException, CommitException {
+		System.out.println("\n--> Submit Transaction: CreateAsset, creates new asset with ID, Color, Size, Owner and AppraisedValue arguments");
+
+		contract.submitTransaction("CreateAsset", assetId, "yellow", "5", "Tom", "1300");
+
+		System.out.println("*** Transaction committed successfully");
+	}
+
+	/**
+	 * Submit transaction asynchronously, allowing the application to process the
+	 * smart contract response (e.g. update a UI) while waiting for the commit
+	 * notification.
+	 */
+	private void transferAssetAsync() throws EndorseException, SubmitException, CommitStatusException {
+		System.out.println("\n--> Async Submit Transaction: TransferAsset, updates existing asset owner");
+
+		var commit = contract.newProposal("TransferAsset")
+				.addArguments(assetId, "Saptha")
+				.build()
+				.endorse()
+				.submitAsync();
+
+		var result = commit.getResult();
+		var oldOwner = new String(result, StandardCharsets.UTF_8);
+
+		System.out.println("*** Successfully submitted transaction to transfer ownership from " + oldOwner + " to Saptha");
+		System.out.println("*** Waiting for transaction commit");
+
+		var status = commit.getStatus();
+		if (!status.isSuccessful()) {
+			throw new RuntimeException("Transaction " + status.getTransactionId() +
+					" failed to commit with status code " + status.getCode());
+		}
+
+		System.out.println("*** Transaction committed successfully");
+	}
+
+	private void readAssetById() throws GatewayException {
+		System.out.println("\n--> Evaluate Transaction: ReadAsset, function returns asset attributes");
+
+		var evaluateResult = contract.evaluateTransaction("ReadAsset", assetId);
+
+		System.out.println("*** Result:" + prettyJson(evaluateResult));
+	}
+
+	/**
+	 * submitTransaction() will throw an error containing details of any error
+	 * responses from the smart contract.
+	 */
+	private void updateNonExistentAsset() {
+		try {
+			System.out.println("\n--> Submit Transaction: UpdateAsset asset70, asset70 does not exist and should return an error");
+
+			contract.submitTransaction("UpdateAsset", "asset70", "blue", "5", "Tomoko", "300");
+
+			System.out.println("******** FAILED to return an error");
+		} catch (EndorseException | SubmitException | CommitStatusException e) {
+			System.out.println("*** Successfully caught the error:");
+			e.printStackTrace(System.out);
+			System.out.println("Transaction ID: " + e.getTransactionId());
+		} catch (CommitException e) {
+			System.out.println("*** Successfully caught the error:");
+			e.printStackTrace(System.out);
+			System.out.println("Transaction ID: " + e.getTransactionId());
+			System.out.println("Status code: " + e.getCode());
+		}
+	}
+}

asset-transfer-basic/application-gateway-javascript/.gitignore

@@ -0,0 +1,11 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Dependency directories
+node_modules/
+jspm_packages/

asset-transfer-basic/application-gateway-javascript/.npmrc

@@ -0,0 +1 @@
+engine-strict=true

asset-transfer-basic/application-gateway-javascript/eslint.config.mjs

@@ -0,0 +1,15 @@
+import js from '@eslint/js';
+import globals from 'globals';
+
+export default [
+    js.configs.recommended,
+    {
+        languageOptions: {
+            ecmaVersion: 2023,
+            sourceType: 'commonjs',
+            globals: {
+                ...globals.node,
+            },
+        },
+    },
+];

asset-transfer-basic/application-gateway-javascript/package.json

@@ -0,0 +1,25 @@
+{
+    "name": "asset-transfer-basic",
+    "version": "1.0.0",
+    "description": "Asset Transfer Basic Application implemented in JavaScript using fabric-gateway",
+    "engines": {
+        "node": ">=20"
+    },
+    "scripts": {
+        "lint": "eslint src",
+        "pretest": "npm run lint",
+        "start": "node src/app.js"
+    },
+    "engineStrict": true,
+    "author": "Hyperledger",
+    "license": "Apache-2.0",
+    "dependencies": {
+        "@grpc/grpc-js": "^1.14.0",
+        "@hyperledger/fabric-gateway": "^1.10.0"
+    },
+    "devDependencies": {
+        "@eslint/js": "^9.5.0",
+        "eslint": "^9.5.0",
+        "globals": "^15.6.0"
+    }
+}

asset-transfer-basic/application-gateway-javascript/src/app.js

@@ -0,0 +1,301 @@
+/*
+ * Copyright IBM Corp. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+const grpc = require('@grpc/grpc-js');
+const { connect, hash, signers } = require('@hyperledger/fabric-gateway');
+const crypto = require('node:crypto');
+const fs = require('node:fs/promises');
+const path = require('node:path');
+const { TextDecoder } = require('node:util');
+
+const channelName = envOrDefault('CHANNEL_NAME', 'mychannel');
+const chaincodeName = envOrDefault('CHAINCODE_NAME', 'basic');
+const mspId = envOrDefault('MSP_ID', 'Org1MSP');
+
+// Path to crypto materials.
+const cryptoPath = envOrDefault(
+    'CRYPTO_PATH',
+    path.resolve(
+        __dirname,
+        '..',
+        '..',
+        '..',
+        'test-network',
+        'organizations',
+        'peerOrganizations',
+        'org1.example.com'
+    )
+);
+
+// Path to user private key directory.
+const keyDirectoryPath = envOrDefault(
+    'KEY_DIRECTORY_PATH',
+    path.resolve(
+        cryptoPath,
+        'users',
+        'User1@org1.example.com',
+        'msp',
+        'keystore'
+    )
+);
+
+// Path to user certificate directory.
+const certDirectoryPath = envOrDefault(
+    'CERT_DIRECTORY_PATH',
+    path.resolve(
+        cryptoPath,
+        'users',
+        'User1@org1.example.com',
+        'msp',
+        'signcerts'
+    )
+);
+
+// Path to peer tls certificate.
+const tlsCertPath = envOrDefault(
+    'TLS_CERT_PATH',
+    path.resolve(cryptoPath, 'peers', 'peer0.org1.example.com', 'tls', 'ca.crt')
+);
+
+// Gateway peer endpoint.
+const peerEndpoint = envOrDefault('PEER_ENDPOINT', 'localhost:7051');
+
+// Gateway peer SSL host name override.
+const peerHostAlias = envOrDefault('PEER_HOST_ALIAS', 'peer0.org1.example.com');
+
+const utf8Decoder = new TextDecoder();
+const assetId = `asset${String(Date.now())}`;
+
+async function main() {
+    displayInputParameters();
+
+    // The gRPC client connection should be shared by all Gateway connections to this endpoint.
+    const client = await newGrpcConnection();
+
+    const gateway = connect({
+        client,
+        identity: await newIdentity(),
+        signer: await newSigner(),
+        hash: hash.sha256,
+        // Default timeouts for different gRPC calls
+        evaluateOptions: () => {
+            return { deadline: Date.now() + 5000 }; // 5 seconds
+        },
+        endorseOptions: () => {
+            return { deadline: Date.now() + 15000 }; // 15 seconds
+        },
+        submitOptions: () => {
+            return { deadline: Date.now() + 5000 }; // 5 seconds
+        },
+        commitStatusOptions: () => {
+            return { deadline: Date.now() + 60000 }; // 1 minute
+        },
+    });
+
+    try {
+        // Get a network instance representing the channel where the smart contract is deployed.
+        const network = gateway.getNetwork(channelName);
+
+        // Get the smart contract from the network.
+        const contract = network.getContract(chaincodeName);
+
+        // Initialize a set of asset data on the ledger using the chaincode 'InitLedger' function.
+        await initLedger(contract);
+
+        // Return all the current assets on the ledger.
+        await getAllAssets(contract);
+
+        // Create a new asset on the ledger.
+        await createAsset(contract);
+
+        // Update an existing asset asynchronously.
+        await transferAssetAsync(contract);
+
+        // Get the asset details by assetID.
+        await readAssetByID(contract);
+
+        // Update an asset which does not exist.
+        await updateNonExistentAsset(contract);
+    } finally {
+        gateway.close();
+        client.close();
+    }
+}
+
+main().catch((error) => {
+    console.error('******** FAILED to run the application:', error);
+    process.exitCode = 1;
+});
+
+async function newGrpcConnection() {
+    const tlsRootCert = await fs.readFile(tlsCertPath);
+    const tlsCredentials = grpc.credentials.createSsl(tlsRootCert);
+    return new grpc.Client(peerEndpoint, tlsCredentials, {
+        'grpc.ssl_target_name_override': peerHostAlias,
+    });
+}
+
+async function newIdentity() {
+    const certPath = await getFirstDirFileName(certDirectoryPath);
+    const credentials = await fs.readFile(certPath);
+    return { mspId, credentials };
+}
+
+async function getFirstDirFileName(dirPath) {
+    const files = await fs.readdir(dirPath);
+    const file = files[0];
+    if (!file) {
+        throw new Error(`No files in directory: ${dirPath}`);
+    }
+    return path.join(dirPath, file);
+}
+
+async function newSigner() {
+    const keyPath = await getFirstDirFileName(keyDirectoryPath);
+    const privateKeyPem = await fs.readFile(keyPath);
+    const privateKey = crypto.createPrivateKey(privateKeyPem);
+    return signers.newPrivateKeySigner(privateKey);
+}
+
+/**
+ * This type of transaction would typically only be run once by an application the first time it was started after its
+ * initial deployment. A new version of the chaincode deployed later would likely not need to run an "init" function.
+ */
+async function initLedger(contract) {
+    console.log(
+        '\n--> Submit Transaction: InitLedger, function creates the initial set of assets on the ledger'
+    );
+
+    await contract.submitTransaction('InitLedger');
+
+    console.log('*** Transaction committed successfully');
+}
+
+/**
+ * Evaluate a transaction to query ledger state.
+ */
+async function getAllAssets(contract) {
+    console.log(
+        '\n--> Evaluate Transaction: GetAllAssets, function returns all the current assets on the ledger'
+    );
+
+    const resultBytes = await contract.evaluateTransaction('GetAllAssets');
+
+    const resultJson = utf8Decoder.decode(resultBytes);
+    const result = JSON.parse(resultJson);
+    console.log('*** Result:', result);
+}
+
+/**
+ * Submit a transaction synchronously, blocking until it has been committed to the ledger.
+ */
+async function createAsset(contract) {
+    console.log(
+        '\n--> Submit Transaction: CreateAsset, creates new asset with ID, Color, Size, Owner and AppraisedValue arguments'
+    );
+
+    await contract.submitTransaction(
+        'CreateAsset',
+        assetId,
+        'yellow',
+        '5',
+        'Tom',
+        '1300'
+    );
+
+    console.log('*** Transaction committed successfully');
+}
+
+/**
+ * Submit transaction asynchronously, allowing the application to process the smart contract response (e.g. update a UI)
+ * while waiting for the commit notification.
+ */
+async function transferAssetAsync(contract) {
+    console.log(
+        '\n--> Async Submit Transaction: TransferAsset, updates existing asset owner'
+    );
+
+    const commit = await contract.submitAsync('TransferAsset', {
+        arguments: [assetId, 'Saptha'],
+    });
+    const oldOwner = utf8Decoder.decode(commit.getResult());
+
+    console.log(
+        `*** Successfully submitted transaction to transfer ownership from ${oldOwner} to Saptha`
+    );
+    console.log('*** Waiting for transaction commit');
+
+    const status = await commit.getStatus();
+    if (!status.successful) {
+        throw new Error(
+            `Transaction ${
+                status.transactionId
+            } failed to commit with status code ${String(status.code)}`
+        );
+    }
+
+    console.log('*** Transaction committed successfully');
+}
+
+async function readAssetByID(contract) {
+    console.log(
+        '\n--> Evaluate Transaction: ReadAsset, function returns asset attributes'
+    );
+
+    const resultBytes = await contract.evaluateTransaction(
+        'ReadAsset',
+        assetId
+    );
+
+    const resultJson = utf8Decoder.decode(resultBytes);
+    const result = JSON.parse(resultJson);
+    console.log('*** Result:', result);
+}
+
+/**
+ * submitTransaction() will throw an error containing details of any error responses from the smart contract.
+ */
+async function updateNonExistentAsset(contract) {
+    console.log(
+        '\n--> Submit Transaction: UpdateAsset asset70, asset70 does not exist and should return an error'
+    );
+
+    try {
+        await contract.submitTransaction(
+            'UpdateAsset',
+            'asset70',
+            'blue',
+            '5',
+            'Tomoko',
+            '300'
+        );
+        console.log('******** FAILED to return an error');
+    } catch (error) {
+        console.log('*** Successfully caught the error: \n', error);
+    }
+}
+
+/**
+ * envOrDefault() will return the value of an environment variable, or a default value if the variable is undefined.
+ */
+function envOrDefault(key, defaultValue) {
+    return process.env[key] || defaultValue;
+}
+
+/**
+ * displayInputParameters() will print the global scope parameters used by the main driver routine.
+ */
+function displayInputParameters() {
+    console.log(`channelName:       ${channelName}`);
+    console.log(`chaincodeName:     ${chaincodeName}`);
+    console.log(`mspId:             ${mspId}`);
+    console.log(`cryptoPath:        ${cryptoPath}`);
+    console.log(`keyDirectoryPath:  ${keyDirectoryPath}`);
+    console.log(`certDirectoryPath: ${certDirectoryPath}`);
+    console.log(`tlsCertPath:       ${tlsCertPath}`);
+    console.log(`peerEndpoint:      ${peerEndpoint}`);
+    console.log(`peerHostAlias:     ${peerHostAlias}`);
+}

asset-transfer-basic/application-gateway-typescript/.gitignore

@@ -0,0 +1,14 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Compiled TypeScript files
+dist

asset-transfer-basic/application-gateway-typescript/.npmrc

@@ -0,0 +1 @@
+engine-strict=true

asset-transfer-basic/application-gateway-typescript/eslint.config.mjs

@@ -0,0 +1,14 @@
+import js from '@eslint/js';
+import { defineConfig } from 'eslint/config';
+import tseslint from 'typescript-eslint';
+
+export default defineConfig(js.configs.recommended, ...tseslint.configs.strictTypeChecked, {
+    languageOptions: {
+        ecmaVersion: 2023,
+        sourceType: 'module',
+        parserOptions: {
+            project: 'tsconfig.json',
+            tsconfigRootDir: import.meta.dirname,
+        },
+    },
+});

asset-transfer-basic/application-gateway-typescript/package.json

@@ -0,0 +1,33 @@
+{
+    "name": "asset-transfer-basic",
+    "version": "1.0.0",
+    "description": "Asset Transfer Basic Application implemented in typeScript using fabric-gateway",
+    "main": "dist/index.js",
+    "typings": "dist/index.d.ts",
+    "engines": {
+        "node": ">=20"
+    },
+    "scripts": {
+        "build": "tsc",
+        "build:watch": "tsc -w",
+        "lint": "eslint src",
+        "prepare": "npm run build",
+        "pretest": "npm run lint",
+        "start": "node dist/app.js"
+    },
+    "engineStrict": true,
+    "author": "Hyperledger",
+    "license": "Apache-2.0",
+    "dependencies": {
+        "@grpc/grpc-js": "^1.14.0",
+        "@hyperledger/fabric-gateway": "^1.10.0"
+    },
+    "devDependencies": {
+        "@eslint/js": "^10.0.1",
+        "@tsconfig/node20": "^20.1.9",
+        "@types/node": "^20.19.33",
+        "eslint": "^10.0.2",
+        "typescript": "~5.8",
+        "typescript-eslint": "^8.56.1"
+    }
+}

asset-transfer-basic/application-gateway-typescript/src/app.ts

@@ -0,0 +1,247 @@
+/*
+ * Copyright IBM Corp. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as grpc from '@grpc/grpc-js';
+import { connect, Contract, hash, Identity, Signer, signers } from '@hyperledger/fabric-gateway';
+import * as crypto from 'crypto';
+import { promises as fs } from 'fs';
+import * as path from 'path';
+import { TextDecoder } from 'util';
+
+const channelName = envOrDefault('CHANNEL_NAME', 'mychannel');
+const chaincodeName = envOrDefault('CHAINCODE_NAME', 'basic');
+const mspId = envOrDefault('MSP_ID', 'Org1MSP');
+
+// Path to crypto materials.
+const cryptoPath = envOrDefault('CRYPTO_PATH', path.resolve(__dirname, '..', '..', '..', 'test-network', 'organizations', 'peerOrganizations', 'org1.example.com'));
+
+// Path to user private key directory.
+const keyDirectoryPath = envOrDefault('KEY_DIRECTORY_PATH', path.resolve(cryptoPath, 'users', 'User1@org1.example.com', 'msp', 'keystore'));
+
+// Path to user certificate directory.
+const certDirectoryPath = envOrDefault('CERT_DIRECTORY_PATH', path.resolve(cryptoPath, 'users', 'User1@org1.example.com', 'msp', 'signcerts'));
+
+// Path to peer tls certificate.
+const tlsCertPath = envOrDefault('TLS_CERT_PATH', path.resolve(cryptoPath, 'peers', 'peer0.org1.example.com', 'tls', 'ca.crt'));
+
+// Gateway peer endpoint.
+const peerEndpoint = envOrDefault('PEER_ENDPOINT', 'localhost:7051');
+
+// Gateway peer SSL host name override.
+const peerHostAlias = envOrDefault('PEER_HOST_ALIAS', 'peer0.org1.example.com');
+
+const utf8Decoder = new TextDecoder();
+const assetId = `asset${String(Date.now())}`;
+
+async function main(): Promise<void> {
+    displayInputParameters();
+
+    // The gRPC client connection should be shared by all Gateway connections to this endpoint.
+    const client = await newGrpcConnection();
+
+    const gateway = connect({
+        client,
+        identity: await newIdentity(),
+        signer: await newSigner(),
+        hash: hash.sha256,
+        // Default timeouts for different gRPC calls
+        evaluateOptions: () => {
+            return { deadline: Date.now() + 5000 }; // 5 seconds
+        },
+        endorseOptions: () => {
+            return { deadline: Date.now() + 15000 }; // 15 seconds
+        },
+        submitOptions: () => {
+            return { deadline: Date.now() + 5000 }; // 5 seconds
+        },
+        commitStatusOptions: () => {
+            return { deadline: Date.now() + 60000 }; // 1 minute
+        },
+    });
+
+    try {
+        // Get a network instance representing the channel where the smart contract is deployed.
+        const network = gateway.getNetwork(channelName);
+
+        // Get the smart contract from the network.
+        const contract = network.getContract(chaincodeName);
+
+        // Initialize a set of asset data on the ledger using the chaincode 'InitLedger' function.
+        await initLedger(contract);
+
+        // Return all the current assets on the ledger.
+        await getAllAssets(contract);
+
+        // Create a new asset on the ledger.
+        await createAsset(contract);
+
+        // Update an existing asset asynchronously.
+        await transferAssetAsync(contract);
+
+        // Get the asset details by assetID.
+        await readAssetByID(contract);
+
+        // Update an asset which does not exist.
+        await updateNonExistentAsset(contract)
+    } finally {
+        gateway.close();
+        client.close();
+    }
+}
+
+main().catch((error: unknown) => {
+    console.error('******** FAILED to run the application:', error);
+    process.exitCode = 1;
+});
+
+async function newGrpcConnection(): Promise<grpc.Client> {
+    const tlsRootCert = await fs.readFile(tlsCertPath);
+    const tlsCredentials = grpc.credentials.createSsl(tlsRootCert);
+    return new grpc.Client(peerEndpoint, tlsCredentials, {
+        'grpc.ssl_target_name_override': peerHostAlias,
+    });
+}
+
+async function newIdentity(): Promise<Identity> {
+    const certPath = await getFirstDirFileName(certDirectoryPath);
+    const credentials = await fs.readFile(certPath);
+    return { mspId, credentials };
+}
+
+async function getFirstDirFileName(dirPath: string): Promise<string> {
+    const files = await fs.readdir(dirPath);
+    const file = files[0];
+    if (!file) {
+        throw new Error(`No files in directory: ${dirPath}`);
+    }
+    return path.join(dirPath, file);
+}
+
+async function newSigner(): Promise<Signer> {
+    const keyPath = await getFirstDirFileName(keyDirectoryPath);
+    const privateKeyPem = await fs.readFile(keyPath);
+    const privateKey = crypto.createPrivateKey(privateKeyPem);
+    return signers.newPrivateKeySigner(privateKey);
+}
+
+/**
+ * This type of transaction would typically only be run once by an application the first time it was started after its
+ * initial deployment. A new version of the chaincode deployed later would likely not need to run an "init" function.
+ */
+async function initLedger(contract: Contract): Promise<void> {
+    console.log('\n--> Submit Transaction: InitLedger, function creates the initial set of assets on the ledger');
+
+    await contract.submitTransaction('InitLedger');
+
+    console.log('*** Transaction committed successfully');
+}
+
+/**
+ * Evaluate a transaction to query ledger state.
+ */
+async function getAllAssets(contract: Contract): Promise<void> {
+    console.log('\n--> Evaluate Transaction: GetAllAssets, function returns all the current assets on the ledger');
+
+    const resultBytes = await contract.evaluateTransaction('GetAllAssets');
+
+    const resultJson = utf8Decoder.decode(resultBytes);
+    const result: unknown = JSON.parse(resultJson);
+    console.log('*** Result:', result);
+}
+
+/**
+ * Submit a transaction synchronously, blocking until it has been committed to the ledger.
+ */
+async function createAsset(contract: Contract): Promise<void> {
+    console.log('\n--> Submit Transaction: CreateAsset, creates new asset with ID, Color, Size, Owner and AppraisedValue arguments');
+
+    await contract.submitTransaction(
+        'CreateAsset',
+        assetId,
+        'yellow',
+        '5',
+        'Tom',
+        '1300',
+    );
+
+    console.log('*** Transaction committed successfully');
+}
+
+/**
+ * Submit transaction asynchronously, allowing the application to process the smart contract response (e.g. update a UI)
+ * while waiting for the commit notification.
+ */
+async function transferAssetAsync(contract: Contract): Promise<void> {
+    console.log('\n--> Async Submit Transaction: TransferAsset, updates existing asset owner');
+
+    const commit = await contract.submitAsync('TransferAsset', {
+        arguments: [assetId, 'Saptha'],
+    });
+    const oldOwner = utf8Decoder.decode(commit.getResult());
+
+    console.log(`*** Successfully submitted transaction to transfer ownership from ${oldOwner} to Saptha`);
+    console.log('*** Waiting for transaction commit');
+
+    const status = await commit.getStatus();
+    if (!status.successful) {
+        throw new Error(`Transaction ${status.transactionId} failed to commit with status code ${String(status.code)}`);
+    }
+
+    console.log('*** Transaction committed successfully');
+}
+
+async function readAssetByID(contract: Contract): Promise<void> {
+    console.log('\n--> Evaluate Transaction: ReadAsset, function returns asset attributes');
+
+    const resultBytes = await contract.evaluateTransaction('ReadAsset', assetId);
+
+    const resultJson = utf8Decoder.decode(resultBytes);
+    const result: unknown = JSON.parse(resultJson);
+    console.log('*** Result:', result);
+}
+
+/**
+ * submitTransaction() will throw an error containing details of any error responses from the smart contract.
+ */
+async function updateNonExistentAsset(contract: Contract): Promise<void>{
+    console.log('\n--> Submit Transaction: UpdateAsset asset70, asset70 does not exist and should return an error');
+
+    try {
+        await contract.submitTransaction(
+            'UpdateAsset',
+            'asset70',
+            'blue',
+            '5',
+            'Tomoko',
+            '300',
+        );
+        console.log('******** FAILED to return an error');
+    } catch (error) {
+        console.log('*** Successfully caught the error: \n', error);
+    }
+}
+
+/**
+ * envOrDefault() will return the value of an environment variable, or a default value if the variable is undefined.
+ */
+function envOrDefault(key: string, defaultValue: string): string {
+    return process.env[key] || defaultValue;
+}
+
+/**
+ * displayInputParameters() will print the global scope parameters used by the main driver routine.
+ */
+function displayInputParameters(): void {
+    console.log(`channelName:       ${channelName}`);
+    console.log(`chaincodeName:     ${chaincodeName}`);
+    console.log(`mspId:             ${mspId}`);
+    console.log(`cryptoPath:        ${cryptoPath}`);
+    console.log(`keyDirectoryPath:  ${keyDirectoryPath}`);
+    console.log(`certDirectoryPath: ${certDirectoryPath}`);
+    console.log(`tlsCertPath:       ${tlsCertPath}`);
+    console.log(`peerEndpoint:      ${peerEndpoint}`);
+    console.log(`peerHostAlias:     ${peerHostAlias}`);
+}

asset-transfer-basic/application-gateway-typescript/tsconfig.json

@@ -0,0 +1,15 @@
+{
+    "extends": "@tsconfig/node20/tsconfig.json",
+    "compilerOptions": {
+        "outDir": "dist",
+        "declaration": true,
+        "declarationMap": true,
+        "sourceMap": true,
+        "noUnusedLocals": true,
+        "noImplicitReturns": true,
+        "noUncheckedIndexedAccess": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "include": ["src/"],
+    "exclude": ["**/*.spec.*"]
+}

asset-transfer-basic/chaincode-external/.dockerignore

@@ -0,0 +1,5 @@
+chaincode.env*
+*.json
+*.md
+*.tar.gz
+*.tgz

asset-transfer-basic/chaincode-external/.gitignore

@@ -0,0 +1,3 @@
+*.tar.gz
+*.tgz
+crypto/*.pem

asset-transfer-basic/chaincode-external/Dockerfile

@@ -0,0 +1,14 @@
+# Copyright IBM Corp. All Rights Reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+FROM golang:alpine
+
+WORKDIR /go/src/github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-external
+COPY . .
+
+RUN go get -d -v ./...
+RUN go install -v ./...
+
+EXPOSE 9999
+CMD ["chaincode-external"]

asset-transfer-basic/chaincode-external/README.md

@@ -0,0 +1,252 @@
+# Asset-Transfer-Basic as an external service
+
+This sample provides an introduction to how to use external builder and launcher scripts to run chaincode as an external service to your peer. For more information, see the [Chaincode as an external service](https://hyperledger-fabric.readthedocs.io/en/latest/cc_service.html) topic in the Fabric documentation.
+
+**Note:** each organization in a real network would need to setup and host their own instance of the external service. In this tutorial, we use the same instance for both organizations for simplicity.
+
+## Setting up the external builder and launcher
+
+External Builders and Launchers is an advanced feature that typically requires custom packaging of the peer image so that it contains all the tools your builder and launcher require. This sample uses very simple (and crude) shell scripts that can be run directly within the default Fabric peer images.
+
+Open the `config/core.yaml` file at the top of the `fabric-samples` directory. If you do not have this file, follow the instructions to [Install the Samples, Binaries and Docker Images](https://hyperledger-fabric.readthedocs.io/en/latest/install.html) to download the Fabric binaries and configuration files alongside the Fabric samples.
+
+Modify the `externalBuilders` field in the `core.yaml` file to resemble the configuration below:
+
+```
+externalBuilders:
+    - path: /opt/gopath/src/github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-external/sampleBuilder
+      name: external-sample-builder
+```
+
+This update sets the name of the external builder as `external-sample-builder`, and the path of the builder to the scripts provided in this sample. Note that this is the path within the peer container, not your local machine.
+
+To set the path within the peer container, you will need to modify the docker compose file to mount a couple of additional volumes. Open the file `test-network/compose/docker/docker-compose-test-net.yaml`, and add to the `volumes` section of both `peer0.org1.example.com` and `peer0.org2.example.com` the following two lines:
+
+```
+        - ../..:/opt/gopath/src/github.com/hyperledger/fabric-samples
+        - ../../config/core.yaml:/etc/hyperledger/peercfg/core.yaml
+```
+
+This update will mount the `core.yaml` that you modified into the peer container and override the configuration file within the peer image. The update also mounts the fabric-sample builder so that it can be found at the location that you specified in `core.yaml`. You also have the option of commenting out the line `- /var/run/docker.sock:/host/var/run/docker.sock`, since we no longer need to access the docker daemon from inside the peer container to launch the chaincode.
+
+## Packaging and installing Chaincode
+
+The Asset-Transfer-Basic external chaincode requires two environment variables to run, `CHAINCODE_SERVER_ADDRESS` and `CHAINCODE_ID`, which are described and set in the `chaincode.env` file.
+
+You need to provide a `connection.json` configuration file to your peer in order to connect to the external Asset-Transfer-Basic service. The address specified in the `connection.json` must correspond to the `CHAINCODE_SERVER_ADDRESS` value in `chaincode.env`, which is `asset-transfer-basic.org1.example.com:9999` in our example.
+
+Because we will run our chaincode as an external service, the chaincode itself does not need to be included in the chaincode
+package that gets installed to each peer. Only the configuration and metadata information needs to be included
+in the package. Since the packaging is trivial, we can manually create the chaincode package.
+
+Open a new terminal and navigate to the `fabric-samples/asset-transfer-basic/chaincode-external` directory.
+
+```
+cd fabric-samples/asset-transfer-basic/chaincode-external
+```
+
+First, create a `code.tar.gz` archive containing the `connection.json` file:
+
+```
+tar cfz code.tar.gz connection.json
+```
+
+Then, create the chaincode package, including the `code.tar.gz` file and the supplied `metadata.json` file:
+
+```
+tar cfz asset-transfer-basic-external.tgz metadata.json code.tar.gz
+```
+
+You are now ready to deploy the external chaincode sample.
+
+## Starting the test network
+
+We will use the Fabric test network to run the external chaincode. Open a new terminal and navigate to the `fabric-samples/test-network` directory.
+
+```
+cd fabric-samples/test-network
+```
+
+Run the following command to deploy the test network and create a new channel:
+
+```
+./network.sh up createChannel -c mychannel -ca
+```
+
+We are now ready to deploy the external chaincode.
+
+## Installing the external chaincode
+
+We can't use the test network script to install an external chaincode so we will have to do a bit more work. However, we can still leverage part of the test-network scripts to make this easier.
+
+From the `test-network` directory, set the following environment variables to use the Fabric binaries:
+
+```
+export PATH=${PWD}/../bin:$PATH
+export FABRIC_CFG_PATH=$PWD/../config/
+```
+
+Run the following command to import functions from the `envVar.sh` script into your terminal. These functions allow you to act as either test network organization.
+
+```
+. ./scripts/envVar.sh
+```
+
+Run the following commands to install the `asset-transfer-basic-external.tar.gz` chaincode on org1. The `setGlobals` function simply sets the environment variables that allow you to act as org1 or org2.
+
+```
+setGlobals 1
+peer lifecycle chaincode install ../asset-transfer-basic/chaincode-external/asset-transfer-basic-external.tgz
+```
+
+Install the chaincode package on the org2 peer:
+
+```
+setGlobals 2
+peer lifecycle chaincode install ../asset-transfer-basic/chaincode-external/asset-transfer-basic-external.tgz
+```
+
+Run the following command to query the package ID of the chaincode that you just installed:
+
+```
+setGlobals 1
+peer lifecycle chaincode queryinstalled --peerAddresses localhost:7051 --tlsRootCertFiles organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
+```
+
+The command will return output similar to the following:
+
+```
+Installed chaincodes on peer:
+Package ID: basic_1.0:ecfc83f251b7c2d9ef376bc3fc20fc6b9744c0fc0a8923092af6542af94790c3, Label: basic_1.0
+```
+
+Save the package ID that was returned by the command as an environment variable. The ID will not be the same for all users, so you need to set the variable using the ID from your command window:
+
+```
+export CHAINCODE_ID=basic_1.0:ecfc83f251b7c2d9ef376bc3fc20fc6b9744c0fc0a8923092af6542af94790c3
+```
+
+## Running the Asset-Transfer-Basic external service
+
+We are going to run the smart contract as an external service by first building and then starting a docker container. Open a new terminal and navigate back to the `chaincode-external` directory:
+
+```
+cd fabric-samples/asset-transfer-basic/chaincode-external
+```
+
+In this directory, open the `chaincode.env` file to set the `CHAINCODE_ID` variable to the same package ID that was returned by the `peer lifecycle chaincode queryinstalled` command. The value should be the same as the environment variable that you set in the previous terminal.
+
+After you edit the `chaincode.env` file, you can use the `Dockerfile` to build an image of the external Asset-Transfer-Basic chaincode:
+
+```
+docker build -t hyperledger/asset-transfer-basic .
+```
+
+You can then run the image to start the Asset-Transfer-Basic service:
+
+```
+docker run -it --rm --name asset-transfer-basic.org1.example.com --hostname asset-transfer-basic.org1.example.com --env-file chaincode.env --network=fabric_test hyperledger/asset-transfer-basic
+```
+
+This will start and run the external chaincode service within the container.
+
+## Deploy the Asset-Transfer-Basic external chaincode definition to the channel
+
+Navigate back to the `test-network` directory to finish deploying the chaincode definition of the external smart contract to the channel. Make sure that your environment variables are still set.
+
+```
+setGlobals 2
+peer lifecycle chaincode approveformyorg -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "$PWD/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" --channelID mychannel --name basic --version 1.0 --package-id $CHAINCODE_ID --sequence 1
+
+setGlobals 1
+peer lifecycle chaincode approveformyorg -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "$PWD/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" --channelID mychannel --name basic --version 1.0 --package-id $CHAINCODE_ID --sequence 1
+
+peer lifecycle chaincode commit -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "$PWD/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" --channelID mychannel --name basic --peerAddresses localhost:7051 --tlsRootCertFiles "$PWD/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt --version 1.0 --sequence 1
+```
+
+The commands above approve the chaincode definition for the external chaincode and commits the definition to the channel. The resulting output should be similar to the following:
+
+```
+2020-08-05 15:41:44.982 PDT [chaincodeCmd] ClientWait -> INFO 001 txid [6bdbe040b99a45cc90a23ec21f02ea5da7be8b70590eb04ff3323ef77fdedfc7] committed with status (VALID) at localhost:7051
+2020-08-05 15:41:44.983 PDT [chaincodeCmd] ClientWait -> INFO 002 txid [6bdbe040b99a45cc90a23ec21f02ea5da7be8b70590eb04ff3323ef77fdedfc7] committed with status (VALID) at localhost:9051
+```
+
+Now that we have started the chaincode service and deployed it to the channel, we can submit transactions as we would with a normal chaincode.
+
+## Using the Asset-Transfer-Basic external chaincode
+
+Open yet another terminal and navigate to the `fabric-samples/asset-transfer-basic/application-gateway-go` directory:
+
+```
+cd fabric-samples/asset-transfer-basic/application-gateway-go
+```
+
+Run the following commands to use the node application in this directory to test the external smart contract:
+
+```
+go run .
+```
+
+If all goes well, the program should run exactly the same as described in the "Writing Your First Application" tutorial.
+
+## Enabling TLS for chaincode and peer communication
+
+**Note:** This section uses an example of self-signed certificate. You may use your organization hosted CA to issue the certificate and generate a key for production deployment.
+
+In the sample so far, you connected both peers in `test-network` to the single instance of chaincode server. However, if you would like to enable TLS between the peer nodes and the chaincode server, each peer node needs to have its own CA certificate. Enabling TLS is made possible at runtime in the chaincode.
+
+- As a first step generate a keypair that can be used. Run these commands from the `fabric-samples/asset-transfer-basic/chaincode-external` directory.
+
+_Find instructions to install `openssl` in [openssl.org](https://www.openssl.org/)_
+
+For `org1.example.com`
+
+```
+openssl req -nodes -x509 -newkey rsa:4096 -keyout crypto/key1.pem -out crypto/cert1.pem -subj "/C=IN/ST=KA/L=Bangalore/O=example Inc/OU=Developer/CN=asset-transfer-basic.org1.example.com/emailAddress=dev@asset-transfer-basic.org1.example.com"
+```
+
+For `org2.example.com`
+
+```
+openssl req -nodes -x509 -newkey rsa:4096 -keyout crypto/key2.pem -out crypto/cert2.pem -subj "/C=IN/ST=KA/L=Bangalore/O=example Inc/OU=Developer/CN=asset-transfer-basic.org2.example.com/emailAddress=dev@asset-transfer-basic.org2.example.com"
+```
+
+- Copy the CA file contents for both `org1.example.com` & `org2.example.com`
+
+```
+cp ../../test-network/organizations/peerOrganizations/org1.example.com/ca/ca.org1.example.com-cert.pem crypto/rootcert1.pem
+cp ../../test-network/organizations/peerOrganizations/org2.example.com/ca/ca.org2.example.com-cert.pem crypto/rootcert2.pem
+```
+
+- Generate a client key and cert for auth purpose. You need a key and cert generated from the CA of each organization. Peer nodes act as clients to chaincode server.
+
+- Change the `connection.json` with the below contents. The `root_cert` parameter is the root CA certificate which the chaincode server is run with. You may run the below commands to get the certificate file contents as strings and copy them when needed.
+
+```
+awk 'NF {sub(/\r/, ""); printf "%s\\n",$0;}' crypto/cert1.pem
+awk 'NF {sub(/\r/, ""); printf "%s\\n",$0;}' crypto/cert2.pem
+```
+
+Similarly, replace the `client_key` and the `client_cert` contents with the values from the previous step.
+
+```
+{
+  "address": "asset-transfer-basic.org1.example.com:9999",
+  "dial_timeout": "10s",
+  "tls_required": true,
+  "client_auth_required": true,
+  "client_key": "-----BEGIN PRIVATE KEY----- ... -----END PRIVATE KEY-----",
+  "client_cert": "-----BEGIN CERTIFICATE---- ... -----END CERTIFICATE-----",
+  "root_cert": "-----BEGIN CERTIFICATE---- ... -----END CERTIFICATE-----"
+}
+```
+
+- Follow the instructions in [Package](#packaging-and-installing-chaincode) and [Install](#installing-the-external-chaincode) steps for each organization. Remember that the chaincode server's address for the second organization is `asset-transfer-basic.org2.example.com:9999`.
+
+- Copy the appropriate `CHAINCODE_ID` to both [chaincode1.env](./chaincode1.env) and [chaincode2.env](./chaincode2.env) files. Bring up the chaincode containers using the docker-compose command below
+
+```
+docker-compose up -f docker-compose-chaincode.yaml up --build -d
+```
+
+- Follow the instructions in [Finish Deployment](#finish-deploying-the-asset-transfer-basic-external-chaincode-) for each organization seperately.

asset-transfer-basic/chaincode-external/assetTransfer.go

@@ -0,0 +1,297 @@
+/*
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+
+	"github.com/hyperledger/fabric-chaincode-go/v2/shim"
+	"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
+)
+
+type serverConfig struct {
+	CCID    string
+	Address string
+}
+
+// SmartContract provides functions for managing an asset
+type SmartContract struct {
+	contractapi.Contract
+}
+
+// Asset describes basic details of what makes up a simple asset
+type Asset struct {
+	ID             string `json:"ID"`
+	Color          string `json:"color"`
+	Size           int    `json:"size"`
+	Owner          string `json:"owner"`
+	AppraisedValue int    `json:"appraisedValue"`
+}
+
+// QueryResult structure used for handling result of query
+type QueryResult struct {
+	Key    string `json:"Key"`
+	Record *Asset
+}
+
+// InitLedger adds a base set of cars to the ledger
+func (s *SmartContract) InitLedger(ctx contractapi.TransactionContextInterface) error {
+	assets := []Asset{
+		{ID: "asset1", Color: "blue", Size: 5, Owner: "Tomoko", AppraisedValue: 300},
+		{ID: "asset2", Color: "red", Size: 5, Owner: "Brad", AppraisedValue: 400},
+		{ID: "asset3", Color: "green", Size: 10, Owner: "Jin Soo", AppraisedValue: 500},
+		{ID: "asset4", Color: "yellow", Size: 10, Owner: "Max", AppraisedValue: 600},
+		{ID: "asset5", Color: "black", Size: 15, Owner: "Adriana", AppraisedValue: 700},
+		{ID: "asset6", Color: "white", Size: 15, Owner: "Michel", AppraisedValue: 800},
+	}
+
+	for _, asset := range assets {
+		assetJSON, err := json.Marshal(asset)
+		if err != nil {
+			return err
+		}
+
+		err = ctx.GetStub().PutState(asset.ID, assetJSON)
+		if err != nil {
+			return fmt.Errorf("failed to put to world state: %v", err)
+		}
+	}
+
+	return nil
+}
+
+// CreateAsset issues a new asset to the world state with given details.
+func (s *SmartContract) CreateAsset(ctx contractapi.TransactionContextInterface, id, color string, size int, owner string, appraisedValue int) error {
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if exists {
+		return fmt.Errorf("the asset %s already exists", id)
+	}
+	asset := Asset{
+		ID:             id,
+		Color:          color,
+		Size:           size,
+		Owner:          owner,
+		AppraisedValue: appraisedValue,
+	}
+
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// ReadAsset returns the asset stored in the world state with given id.
+func (s *SmartContract) ReadAsset(ctx contractapi.TransactionContextInterface, id string) (*Asset, error) {
+	assetJSON, err := ctx.GetStub().GetState(id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read from world state. %s", err.Error())
+	}
+	if assetJSON == nil {
+		return nil, fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	var asset Asset
+	err = json.Unmarshal(assetJSON, &asset)
+	if err != nil {
+		return nil, err
+	}
+
+	return &asset, nil
+}
+
+// UpdateAsset updates an existing asset in the world state with provided parameters.
+func (s *SmartContract) UpdateAsset(ctx contractapi.TransactionContextInterface, id, color string, size int, owner string, appraisedValue int) error {
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	// overwriting original asset with new asset
+	asset := Asset{
+		ID:             id,
+		Color:          color,
+		Size:           size,
+		Owner:          owner,
+		AppraisedValue: appraisedValue,
+	}
+
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// DeleteAsset deletes a given asset from the world state.
+func (s *SmartContract) DeleteAsset(ctx contractapi.TransactionContextInterface, id string) error {
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	return ctx.GetStub().DelState(id)
+}
+
+// AssetExists returns true when asset with given ID exists in world state
+func (s *SmartContract) AssetExists(ctx contractapi.TransactionContextInterface, id string) (bool, error) {
+	assetJSON, err := ctx.GetStub().GetState(id)
+	if err != nil {
+		return false, fmt.Errorf("failed to read from world state. %s", err.Error())
+	}
+
+	return assetJSON != nil, nil
+}
+
+// TransferAsset updates the owner field of asset with given id in world state, and returns the old owner.
+func (s *SmartContract) TransferAsset(ctx contractapi.TransactionContextInterface, id string, newOwner string) (string, error) {
+	asset, err := s.ReadAsset(ctx, id)
+	if err != nil {
+		return "", err
+	}
+
+	oldOwner := asset.Owner
+	asset.Owner = newOwner
+
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return "", err
+	}
+
+	err = ctx.GetStub().PutState(id, assetJSON)
+	if err != nil {
+		return "", err
+	}
+
+	return oldOwner, nil
+}
+
+// GetAllAssets returns all assets found in world state
+func (s *SmartContract) GetAllAssets(ctx contractapi.TransactionContextInterface) ([]QueryResult, error) {
+	// range query with empty string for startKey and endKey does an open-ended query of all assets in the chaincode namespace.
+	resultsIterator, err := ctx.GetStub().GetStateByRange("", "")
+
+	if err != nil {
+		return nil, err
+	}
+	defer resultsIterator.Close()
+
+	var results []QueryResult
+
+	for resultsIterator.HasNext() {
+		queryResponse, err := resultsIterator.Next()
+
+		if err != nil {
+			return nil, err
+		}
+
+		var asset Asset
+		err = json.Unmarshal(queryResponse.Value, &asset)
+		if err != nil {
+			return nil, err
+		}
+
+		queryResult := QueryResult{Key: queryResponse.Key, Record: &asset}
+		results = append(results, queryResult)
+	}
+
+	return results, nil
+}
+
+func main() {
+	// See chaincode.env.example
+	config := serverConfig{
+		CCID:    os.Getenv("CHAINCODE_ID"),
+		Address: os.Getenv("CHAINCODE_SERVER_ADDRESS"),
+	}
+
+	chaincode, err := contractapi.NewChaincode(&SmartContract{})
+
+	if err != nil {
+		log.Panicf("error create asset-transfer-basic chaincode: %s", err)
+	}
+
+	server := &shim.ChaincodeServer{
+		CCID:     config.CCID,
+		Address:  config.Address,
+		CC:       chaincode,
+		TLSProps: getTLSProperties(),
+	}
+
+	if err := server.Start(); err != nil {
+		log.Panicf("error starting asset-transfer-basic chaincode: %s", err)
+	}
+}
+
+func getTLSProperties() shim.TLSProperties {
+	// Check if chaincode is TLS enabled
+	tlsDisabledStr := getEnvOrDefault("CHAINCODE_TLS_DISABLED", "true")
+	key := getEnvOrDefault("CHAINCODE_TLS_KEY", "")
+	cert := getEnvOrDefault("CHAINCODE_TLS_CERT", "")
+	clientCACert := getEnvOrDefault("CHAINCODE_CLIENT_CA_CERT", "")
+
+	// convert tlsDisabledStr to boolean
+	tlsDisabled := getBoolOrDefault(tlsDisabledStr, false)
+	var keyBytes, certBytes, clientCACertBytes []byte
+	var err error
+
+	if !tlsDisabled {
+		keyBytes, err = os.ReadFile(key)
+		if err != nil {
+			log.Panicf("error while reading the crypto file: %s", err)
+		}
+		certBytes, err = os.ReadFile(cert)
+		if err != nil {
+			log.Panicf("error while reading the crypto file: %s", err)
+		}
+	}
+	// Did not request for the peer cert verification
+	if clientCACert != "" {
+		clientCACertBytes, err = os.ReadFile(clientCACert)
+		if err != nil {
+			log.Panicf("error while reading the crypto file: %s", err)
+		}
+	}
+
+	return shim.TLSProperties{
+		Disabled:      tlsDisabled,
+		Key:           keyBytes,
+		Cert:          certBytes,
+		ClientCACerts: clientCACertBytes,
+	}
+}
+
+func getEnvOrDefault(env, defaultVal string) string {
+	value, ok := os.LookupEnv(env)
+	if !ok {
+		value = defaultVal
+	}
+	return value
+}
+
+// Note that the method returns default value if the string
+// cannot be parsed!
+func getBoolOrDefault(value string, defaultVal bool) bool {
+	parsed, err := strconv.ParseBool(value)
+	if err != nil {
+		return defaultVal
+	}
+	return parsed
+}

asset-transfer-basic/chaincode-external/chaincode.env

@@ -0,0 +1,24 @@
+# CHAINCODE_SERVER_ADDRESS must be set to the host and port where the peer can
+# connect to the chaincode server
+CHAINCODE_SERVER_ADDRESS=asset-transfer-basic.org1.example.com:9999
+
+# CHAINCODE_ID must be set to the Package ID that is assigned to the chaincode
+# on install. The `peer lifecycle chaincode queryinstalled` command can be
+# used to get the ID after install if required
+CHAINCODE_ID=basic_1.0:0262396ccaffaa2174bc09f750f742319c4f14d60b16334d2c8921b6842c090c
+
+# Optional parameters that will be used for TLS connection between peer node
+# and the chaincode.
+# TLS is disabled by default, uncomment the following line to enable TLS connection
+# CHAINCODE_TLS_DISABLED=false
+
+# Following variables will be ignored if TLS is not enabled.
+# They need to be in PEM format
+# CHAINCODE_TLS_KEY=/path/to/private/key/file
+# CHAINCODE_TLS_CERT=/path/to/public/cert/file
+
+# The following variable will be used by the chaincode server to verify the
+# connection from the peer node.
+# Note that when this is set a single chaincode server cannot be shared
+# across organizations unless their root CA is same.
+# CHAINCODE_CLIENT_CA_CERT=/path/to/peer/organization/root/ca/cert/file

asset-transfer-basic/chaincode-external/chaincode1.env

@@ -0,0 +1,24 @@
+# CHAINCODE_SERVER_ADDRESS must be set to the host and port where the peer can
+# connect to the chaincode server
+CHAINCODE_SERVER_ADDRESS=asset-transfer-basic.org1.example.com:9999
+
+# CHAINCODE_ID must be set to the Package ID that is assigned to the chaincode
+# on install. The `peer lifecycle chaincode queryinstalled` command can be
+# used to get the ID after install if required
+CHAINCODE_ID=basic_1.0:6726c6b6d8ff66fcf5710b72c6ce512d24f118c51c3de510b3d43e51fa592a7d
+
+# Optional parameters that will be used for TLS connection between peer node
+# and the chaincode.
+# TLS is disabled by default, uncomment the following line to enable TLS connection
+CHAINCODE_TLS_DISABLED=false
+
+# Following variables will be ignored if TLS is not enabled.
+# They need to be in PEM format
+CHAINCODE_TLS_KEY=/crypto/key1.pem
+CHAINCODE_TLS_CERT=/crypto/cert1.pem
+
+# The following variable will be used by the chaincode server to verify the
+# connection from the peer node.
+# Note that when this is set a single chaincode server cannot be shared
+# across organizations unless their root CA is same.
+CHAINCODE_CLIENT_CA_CERT=/crypto/rootcert1.pem

asset-transfer-basic/chaincode-external/chaincode2.env

@@ -0,0 +1,24 @@
+# CHAINCODE_SERVER_ADDRESS must be set to the host and port where the peer can
+# connect to the chaincode server
+CHAINCODE_SERVER_ADDRESS=asset-transfer-basic.org2.example.com:9999
+
+# CHAINCODE_ID must be set to the Package ID that is assigned to the chaincode
+# on install. The `peer lifecycle chaincode queryinstalled` command can be
+# used to get the ID after install if required
+CHAINCODE_ID=basic_1.0:e8f9052385e3763ecf5635591155da05d8efbb6905ccbfc1c7229eb6bd28df1b
+
+# Optional parameters that will be used for TLS connection between peer node
+# and the chaincode.
+# TLS is disabled by default, uncomment the following line to enable TLS connection
+CHAINCODE_TLS_DISABLED=false
+
+# Following variables will be ignored if TLS is not enabled.
+# They need to be in PEM format
+CHAINCODE_TLS_KEY=/crypto/key2.pem
+CHAINCODE_TLS_CERT=/crypto/cert2.pem
+
+# The following variable will be used by the chaincode server to verify the
+# connection from the peer node.
+# Note that when this is set a single chaincode server cannot be shared
+# across organizations unless their root CA is same.
+CHAINCODE_CLIENT_CA_CERT=/crypto/rootcert2.pem

asset-transfer-basic/chaincode-external/connection.json

@@ -0,0 +1,5 @@
+{
+  "address": "asset-transfer-basic.org1.example.com:9999",
+  "dial_timeout": "10s",
+  "tls_required": false
+}

asset-transfer-basic/chaincode-external/docker-compose-chaincode.yaml

@@ -0,0 +1,30 @@
+networks:
+    docker_test:
+        external: true
+
+services:
+    asset-transfer-basic.org1.example.com:
+        build: .
+        container_name: asset-transfer-basic.org1.example.com
+        hostname: asset-transfer-basic.org1.example.com
+        volumes:
+            - ./crypto:/crypto
+        env_file:
+            - chaincode1.env
+        networks:
+            docker_test:
+        expose:
+            - 9999
+
+    asset-transfer-basic.org2.example.com:
+        build: .
+        container_name: asset-transfer-basic.org2.example.com
+        hostname: asset-transfer-basic.org2.example.com
+        volumes:
+            - ./crypto:/crypto
+        env_file:
+            - chaincode2.env
+        networks:
+            docker_test:
+        expose:
+            - 9999

asset-transfer-basic/chaincode-external/go.mod

@@ -0,0 +1,28 @@
+module github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-external
+
+go 1.23.0
+
+require (
+	github.com/hyperledger/fabric-chaincode-go/v2 v2.0.0
+	github.com/hyperledger/fabric-contract-api-go/v2 v2.2.0
+)
+
+require (
+	github.com/go-openapi/jsonpointer v0.21.0 // indirect
+	github.com/go-openapi/jsonreference v0.21.0 // indirect
+	github.com/go-openapi/spec v0.21.0 // indirect
+	github.com/go-openapi/swag v0.23.0 // indirect
+	github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
+	golang.org/x/net v0.38.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
+	google.golang.org/grpc v1.71.0 // indirect
+	google.golang.org/protobuf v1.36.4 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

asset-transfer-basic/chaincode-external/go.sum

@@ -0,0 +1,81 @@
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asset-transfer-basic/chaincode-external/metadata.json

@@ -0,0 +1,4 @@
+{
+    "type": "external",
+    "label": "basic_1.0"
+}

asset-transfer-basic/chaincode-external/sampleBuilder/bin/build

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -euo pipefail
+
+SOURCE=$1
+OUTPUT=$3
+
+#external chaincodes expect connection.json file in the chaincode package
+if [ ! -f "$SOURCE/connection.json" ]; then
+    >&2 echo "$SOURCE/connection.json not found"
+    exit 1
+fi
+
+#simply copy the endpoint information to specified output location
+cp $SOURCE/connection.json $OUTPUT/connection.json
+
+if [ -d "$SOURCE/metadata" ]; then
+    cp -a $SOURCE/metadata $OUTPUT/metadata
+fi
+
+exit 0

asset-transfer-basic/chaincode-external/sampleBuilder/bin/detect

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+METADIR=$2
+# check if the "type" field is set to "external"
+# crude way without jq which is not in the default fabric peer image
+TYPE=$(tr -d '\n' < "$METADIR/metadata.json" | awk -F':' '{ for (i = 1; i < NF; i++){ if ($i~/type/) { print $(i+1); break }}}'| cut -d\" -f2)
+
+if [ "$TYPE" = "external" ]; then
+    exit 0
+fi
+
+exit 1

asset-transfer-basic/chaincode-external/sampleBuilder/bin/release

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+BLD="$1"
+RELEASE="$2"
+
+if [ -d "$BLD/metadata" ]; then
+   cp -a "$BLD/metadata/"* "$RELEASE/"
+fi
+
+#external chaincodes expect artifacts to be placed under "$RELEASE"/chaincode/server
+if [ -f $BLD/connection.json ]; then
+   mkdir -p "$RELEASE"/chaincode/server
+   cp $BLD/connection.json "$RELEASE"/chaincode/server
+
+   #if tls_required is true, copy TLS files (using above example, the fully qualified path for these fils would be "$RELEASE"/chaincode/server/tls)
+
+   exit 0
+fi
+
+exit 1

asset-transfer-basic/chaincode-go/assetTransfer.go

@@ -0,0 +1,23 @@
+/*
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package main
+
+import (
+	"log"
+
+	"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
+	"github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-go/chaincode"
+)
+
+func main() {
+	assetChaincode, err := contractapi.NewChaincode(&chaincode.SmartContract{})
+	if err != nil {
+		log.Panicf("Error creating asset-transfer-basic chaincode: %v", err)
+	}
+
+	if err := assetChaincode.Start(); err != nil {
+		log.Panicf("Error starting asset-transfer-basic chaincode: %v", err)
+	}
+}

asset-transfer-basic/chaincode-go/chaincode/mocks/statequeryiterator.go

@@ -0,0 +1,235 @@
+// Code generated by counterfeiter. DO NOT EDIT.
+package mocks
+
+import (
+	"sync"
+
+	"github.com/hyperledger/fabric-protos-go-apiv2/ledger/queryresult"
+)
+
+type StateQueryIterator struct {
+	CloseStub        func() error
+	closeMutex       sync.RWMutex
+	closeArgsForCall []struct {
+	}
+	closeReturns struct {
+		result1 error
+	}
+	closeReturnsOnCall map[int]struct {
+		result1 error
+	}
+	HasNextStub        func() bool
+	hasNextMutex       sync.RWMutex
+	hasNextArgsForCall []struct {
+	}
+	hasNextReturns struct {
+		result1 bool
+	}
+	hasNextReturnsOnCall map[int]struct {
+		result1 bool
+	}
+	NextStub        func() (*queryresult.KV, error)
+	nextMutex       sync.RWMutex
+	nextArgsForCall []struct {
+	}
+	nextReturns struct {
+		result1 *queryresult.KV
+		result2 error
+	}
+	nextReturnsOnCall map[int]struct {
+		result1 *queryresult.KV
+		result2 error
+	}
+	invocations      map[string][][]interface{}
+	invocationsMutex sync.RWMutex
+}
+
+func (fake *StateQueryIterator) Close() error {
+	fake.closeMutex.Lock()
+	ret, specificReturn := fake.closeReturnsOnCall[len(fake.closeArgsForCall)]
+	fake.closeArgsForCall = append(fake.closeArgsForCall, struct {
+	}{})
+	stub := fake.CloseStub
+	fakeReturns := fake.closeReturns
+	fake.recordInvocation("Close", []interface{}{})
+	fake.closeMutex.Unlock()
+	if stub != nil {
+		return stub()
+	}
+	if specificReturn {
+		return ret.result1
+	}
+	return fakeReturns.result1
+}
+
+func (fake *StateQueryIterator) CloseCallCount() int {
+	fake.closeMutex.RLock()
+	defer fake.closeMutex.RUnlock()
+	return len(fake.closeArgsForCall)
+}
+
+func (fake *StateQueryIterator) CloseCalls(stub func() error) {
+	fake.closeMutex.Lock()
+	defer fake.closeMutex.Unlock()
+	fake.CloseStub = stub
+}
+
+func (fake *StateQueryIterator) CloseReturns(result1 error) {
+	fake.closeMutex.Lock()
+	defer fake.closeMutex.Unlock()
+	fake.CloseStub = nil
+	fake.closeReturns = struct {
+		result1 error
+	}{result1}
+}
+
+func (fake *StateQueryIterator) CloseReturnsOnCall(i int, result1 error) {
+	fake.closeMutex.Lock()
+	defer fake.closeMutex.Unlock()
+	fake.CloseStub = nil
+	if fake.closeReturnsOnCall == nil {
+		fake.closeReturnsOnCall = make(map[int]struct {
+			result1 error
+		})
+	}
+	fake.closeReturnsOnCall[i] = struct {
+		result1 error
+	}{result1}
+}
+
+func (fake *StateQueryIterator) HasNext() bool {
+	fake.hasNextMutex.Lock()
+	ret, specificReturn := fake.hasNextReturnsOnCall[len(fake.hasNextArgsForCall)]
+	fake.hasNextArgsForCall = append(fake.hasNextArgsForCall, struct {
+	}{})
+	stub := fake.HasNextStub
+	fakeReturns := fake.hasNextReturns
+	fake.recordInvocation("HasNext", []interface{}{})
+	fake.hasNextMutex.Unlock()
+	if stub != nil {
+		return stub()
+	}
+	if specificReturn {
+		return ret.result1
+	}
+	return fakeReturns.result1
+}
+
+func (fake *StateQueryIterator) HasNextCallCount() int {
+	fake.hasNextMutex.RLock()
+	defer fake.hasNextMutex.RUnlock()
+	return len(fake.hasNextArgsForCall)
+}
+
+func (fake *StateQueryIterator) HasNextCalls(stub func() bool) {
+	fake.hasNextMutex.Lock()
+	defer fake.hasNextMutex.Unlock()
+	fake.HasNextStub = stub
+}
+
+func (fake *StateQueryIterator) HasNextReturns(result1 bool) {
+	fake.hasNextMutex.Lock()
+	defer fake.hasNextMutex.Unlock()
+	fake.HasNextStub = nil
+	fake.hasNextReturns = struct {
+		result1 bool
+	}{result1}
+}
+
+func (fake *StateQueryIterator) HasNextReturnsOnCall(i int, result1 bool) {
+	fake.hasNextMutex.Lock()
+	defer fake.hasNextMutex.Unlock()
+	fake.HasNextStub = nil
+	if fake.hasNextReturnsOnCall == nil {
+		fake.hasNextReturnsOnCall = make(map[int]struct {
+			result1 bool
+		})
+	}
+	fake.hasNextReturnsOnCall[i] = struct {
+		result1 bool
+	}{result1}
+}
+
+func (fake *StateQueryIterator) Next() (*queryresult.KV, error) {
+	fake.nextMutex.Lock()
+	ret, specificReturn := fake.nextReturnsOnCall[len(fake.nextArgsForCall)]
+	fake.nextArgsForCall = append(fake.nextArgsForCall, struct {
+	}{})
+	stub := fake.NextStub
+	fakeReturns := fake.nextReturns
+	fake.recordInvocation("Next", []interface{}{})
+	fake.nextMutex.Unlock()
+	if stub != nil {
+		return stub()
+	}
+	if specificReturn {
+		return ret.result1, ret.result2
+	}
+	return fakeReturns.result1, fakeReturns.result2
+}
+
+func (fake *StateQueryIterator) NextCallCount() int {
+	fake.nextMutex.RLock()
+	defer fake.nextMutex.RUnlock()
+	return len(fake.nextArgsForCall)
+}
+
+func (fake *StateQueryIterator) NextCalls(stub func() (*queryresult.KV, error)) {
+	fake.nextMutex.Lock()
+	defer fake.nextMutex.Unlock()
+	fake.NextStub = stub
+}
+
+func (fake *StateQueryIterator) NextReturns(result1 *queryresult.KV, result2 error) {
+	fake.nextMutex.Lock()
+	defer fake.nextMutex.Unlock()
+	fake.NextStub = nil
+	fake.nextReturns = struct {
+		result1 *queryresult.KV
+		result2 error
+	}{result1, result2}
+}
+
+func (fake *StateQueryIterator) NextReturnsOnCall(i int, result1 *queryresult.KV, result2 error) {
+	fake.nextMutex.Lock()
+	defer fake.nextMutex.Unlock()
+	fake.NextStub = nil
+	if fake.nextReturnsOnCall == nil {
+		fake.nextReturnsOnCall = make(map[int]struct {
+			result1 *queryresult.KV
+			result2 error
+		})
+	}
+	fake.nextReturnsOnCall[i] = struct {
+		result1 *queryresult.KV
+		result2 error
+	}{result1, result2}
+}
+
+func (fake *StateQueryIterator) Invocations() map[string][][]interface{} {
+	fake.invocationsMutex.RLock()
+	defer fake.invocationsMutex.RUnlock()
+	fake.closeMutex.RLock()
+	defer fake.closeMutex.RUnlock()
+	fake.hasNextMutex.RLock()
+	defer fake.hasNextMutex.RUnlock()
+	fake.nextMutex.RLock()
+	defer fake.nextMutex.RUnlock()
+	copiedInvocations := map[string][][]interface{}{}
+	for key, value := range fake.invocations {
+		copiedInvocations[key] = value
+	}
+	return copiedInvocations
+}
+
+func (fake *StateQueryIterator) recordInvocation(key string, args []interface{}) {
+	fake.invocationsMutex.Lock()
+	defer fake.invocationsMutex.Unlock()
+	if fake.invocations == nil {
+		fake.invocations = map[string][][]interface{}{}
+	}
+	if fake.invocations[key] == nil {
+		fake.invocations[key] = [][]interface{}{}
+	}
+	fake.invocations[key] = append(fake.invocations[key], args)
+}

asset-transfer-basic/chaincode-go/chaincode/mocks/transaction.go

@@ -0,0 +1,166 @@
+// Code generated by counterfeiter. DO NOT EDIT.
+package mocks
+
+import (
+	"sync"
+
+	"github.com/hyperledger/fabric-chaincode-go/v2/pkg/cid"
+	"github.com/hyperledger/fabric-chaincode-go/v2/shim"
+)
+
+type TransactionContext struct {
+	GetClientIdentityStub        func() cid.ClientIdentity
+	getClientIdentityMutex       sync.RWMutex
+	getClientIdentityArgsForCall []struct {
+	}
+	getClientIdentityReturns struct {
+		result1 cid.ClientIdentity
+	}
+	getClientIdentityReturnsOnCall map[int]struct {
+		result1 cid.ClientIdentity
+	}
+	GetStubStub        func() shim.ChaincodeStubInterface
+	getStubMutex       sync.RWMutex
+	getStubArgsForCall []struct {
+	}
+	getStubReturns struct {
+		result1 shim.ChaincodeStubInterface
+	}
+	getStubReturnsOnCall map[int]struct {
+		result1 shim.ChaincodeStubInterface
+	}
+	invocations      map[string][][]interface{}
+	invocationsMutex sync.RWMutex
+}
+
+func (fake *TransactionContext) GetClientIdentity() cid.ClientIdentity {
+	fake.getClientIdentityMutex.Lock()
+	ret, specificReturn := fake.getClientIdentityReturnsOnCall[len(fake.getClientIdentityArgsForCall)]
+	fake.getClientIdentityArgsForCall = append(fake.getClientIdentityArgsForCall, struct {
+	}{})
+	stub := fake.GetClientIdentityStub
+	fakeReturns := fake.getClientIdentityReturns
+	fake.recordInvocation("GetClientIdentity", []interface{}{})
+	fake.getClientIdentityMutex.Unlock()
+	if stub != nil {
+		return stub()
+	}
+	if specificReturn {
+		return ret.result1
+	}
+	return fakeReturns.result1
+}
+
+func (fake *TransactionContext) GetClientIdentityCallCount() int {
+	fake.getClientIdentityMutex.RLock()
+	defer fake.getClientIdentityMutex.RUnlock()
+	return len(fake.getClientIdentityArgsForCall)
+}
+
+func (fake *TransactionContext) GetClientIdentityCalls(stub func() cid.ClientIdentity) {
+	fake.getClientIdentityMutex.Lock()
+	defer fake.getClientIdentityMutex.Unlock()
+	fake.GetClientIdentityStub = stub
+}
+
+func (fake *TransactionContext) GetClientIdentityReturns(result1 cid.ClientIdentity) {
+	fake.getClientIdentityMutex.Lock()
+	defer fake.getClientIdentityMutex.Unlock()
+	fake.GetClientIdentityStub = nil
+	fake.getClientIdentityReturns = struct {
+		result1 cid.ClientIdentity
+	}{result1}
+}
+
+func (fake *TransactionContext) GetClientIdentityReturnsOnCall(i int, result1 cid.ClientIdentity) {
+	fake.getClientIdentityMutex.Lock()
+	defer fake.getClientIdentityMutex.Unlock()
+	fake.GetClientIdentityStub = nil
+	if fake.getClientIdentityReturnsOnCall == nil {
+		fake.getClientIdentityReturnsOnCall = make(map[int]struct {
+			result1 cid.ClientIdentity
+		})
+	}
+	fake.getClientIdentityReturnsOnCall[i] = struct {
+		result1 cid.ClientIdentity
+	}{result1}
+}
+
+func (fake *TransactionContext) GetStub() shim.ChaincodeStubInterface {
+	fake.getStubMutex.Lock()
+	ret, specificReturn := fake.getStubReturnsOnCall[len(fake.getStubArgsForCall)]
+	fake.getStubArgsForCall = append(fake.getStubArgsForCall, struct {
+	}{})
+	stub := fake.GetStubStub
+	fakeReturns := fake.getStubReturns
+	fake.recordInvocation("GetStub", []interface{}{})
+	fake.getStubMutex.Unlock()
+	if stub != nil {
+		return stub()
+	}
+	if specificReturn {
+		return ret.result1
+	}
+	return fakeReturns.result1
+}
+
+func (fake *TransactionContext) GetStubCallCount() int {
+	fake.getStubMutex.RLock()
+	defer fake.getStubMutex.RUnlock()
+	return len(fake.getStubArgsForCall)
+}
+
+func (fake *TransactionContext) GetStubCalls(stub func() shim.ChaincodeStubInterface) {
+	fake.getStubMutex.Lock()
+	defer fake.getStubMutex.Unlock()
+	fake.GetStubStub = stub
+}
+
+func (fake *TransactionContext) GetStubReturns(result1 shim.ChaincodeStubInterface) {
+	fake.getStubMutex.Lock()
+	defer fake.getStubMutex.Unlock()
+	fake.GetStubStub = nil
+	fake.getStubReturns = struct {
+		result1 shim.ChaincodeStubInterface
+	}{result1}
+}
+
+func (fake *TransactionContext) GetStubReturnsOnCall(i int, result1 shim.ChaincodeStubInterface) {
+	fake.getStubMutex.Lock()
+	defer fake.getStubMutex.Unlock()
+	fake.GetStubStub = nil
+	if fake.getStubReturnsOnCall == nil {
+		fake.getStubReturnsOnCall = make(map[int]struct {
+			result1 shim.ChaincodeStubInterface
+		})
+	}
+	fake.getStubReturnsOnCall[i] = struct {
+		result1 shim.ChaincodeStubInterface
+	}{result1}
+}
+
+func (fake *TransactionContext) Invocations() map[string][][]interface{} {
+	fake.invocationsMutex.RLock()
+	defer fake.invocationsMutex.RUnlock()
+	fake.getClientIdentityMutex.RLock()
+	defer fake.getClientIdentityMutex.RUnlock()
+	fake.getStubMutex.RLock()
+	defer fake.getStubMutex.RUnlock()
+	copiedInvocations := map[string][][]interface{}{}
+	for key, value := range fake.invocations {
+		copiedInvocations[key] = value
+	}
+	return copiedInvocations
+}
+
+func (fake *TransactionContext) recordInvocation(key string, args []interface{}) {
+	fake.invocationsMutex.Lock()
+	defer fake.invocationsMutex.Unlock()
+	if fake.invocations == nil {
+		fake.invocations = map[string][][]interface{}{}
+	}
+	if fake.invocations[key] == nil {
+		fake.invocations[key] = [][]interface{}{}
+	}
+	fake.invocations[key] = append(fake.invocations[key], args)
+}

asset-transfer-basic/chaincode-go/chaincode/smartcontract.go

@@ -0,0 +1,194 @@
+package chaincode
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
+)
+
+// SmartContract provides functions for managing an Asset
+type SmartContract struct {
+	contractapi.Contract
+}
+
+// Asset describes basic details of what makes up a simple asset
+// Insert struct field in alphabetic order => to achieve determinism across languages
+// golang keeps the order when marshal to json but doesn't order automatically
+type Asset struct {
+	AppraisedValue int    `json:"AppraisedValue"`
+	Color          string `json:"Color"`
+	ID             string `json:"ID"`
+	Owner          string `json:"Owner"`
+	Size           int    `json:"Size"`
+}
+
+// InitLedger adds a base set of assets to the ledger
+func (s *SmartContract) InitLedger(ctx contractapi.TransactionContextInterface) error {
+	assets := []Asset{
+		{ID: "asset1", Color: "blue", Size: 5, Owner: "Tomoko", AppraisedValue: 300},
+		{ID: "asset2", Color: "red", Size: 5, Owner: "Brad", AppraisedValue: 400},
+		{ID: "asset3", Color: "green", Size: 10, Owner: "Jin Soo", AppraisedValue: 500},
+		{ID: "asset4", Color: "yellow", Size: 10, Owner: "Max", AppraisedValue: 600},
+		{ID: "asset5", Color: "black", Size: 15, Owner: "Adriana", AppraisedValue: 700},
+		{ID: "asset6", Color: "white", Size: 15, Owner: "Michel", AppraisedValue: 800},
+	}
+
+	for _, asset := range assets {
+		assetJSON, err := json.Marshal(asset)
+		if err != nil {
+			return err
+		}
+
+		err = ctx.GetStub().PutState(asset.ID, assetJSON)
+		if err != nil {
+			return fmt.Errorf("failed to put to world state. %v", err)
+		}
+	}
+
+	return nil
+}
+
+// CreateAsset issues a new asset to the world state with given details.
+func (s *SmartContract) CreateAsset(ctx contractapi.TransactionContextInterface, id string, color string, size int, owner string, appraisedValue int) error {
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if exists {
+		return fmt.Errorf("the asset %s already exists", id)
+	}
+
+	asset := Asset{
+		ID:             id,
+		Color:          color,
+		Size:           size,
+		Owner:          owner,
+		AppraisedValue: appraisedValue,
+	}
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// ReadAsset returns the asset stored in the world state with given id.
+func (s *SmartContract) ReadAsset(ctx contractapi.TransactionContextInterface, id string) (*Asset, error) {
+	assetJSON, err := ctx.GetStub().GetState(id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read from world state: %v", err)
+	}
+	if assetJSON == nil {
+		return nil, fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	var asset Asset
+	err = json.Unmarshal(assetJSON, &asset)
+	if err != nil {
+		return nil, err
+	}
+
+	return &asset, nil
+}
+
+// UpdateAsset updates an existing asset in the world state with provided parameters.
+func (s *SmartContract) UpdateAsset(ctx contractapi.TransactionContextInterface, id string, color string, size int, owner string, appraisedValue int) error {
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	// overwriting original asset with new asset
+	asset := Asset{
+		ID:             id,
+		Color:          color,
+		Size:           size,
+		Owner:          owner,
+		AppraisedValue: appraisedValue,
+	}
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return err
+	}
+
+	return ctx.GetStub().PutState(id, assetJSON)
+}
+
+// DeleteAsset deletes an given asset from the world state.
+func (s *SmartContract) DeleteAsset(ctx contractapi.TransactionContextInterface, id string) error {
+	exists, err := s.AssetExists(ctx, id)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return fmt.Errorf("the asset %s does not exist", id)
+	}
+
+	return ctx.GetStub().DelState(id)
+}
+
+// AssetExists returns true when asset with given ID exists in world state
+func (s *SmartContract) AssetExists(ctx contractapi.TransactionContextInterface, id string) (bool, error) {
+	assetJSON, err := ctx.GetStub().GetState(id)
+	if err != nil {
+		return false, fmt.Errorf("failed to read from world state: %v", err)
+	}
+
+	return assetJSON != nil, nil
+}
+
+// TransferAsset updates the owner field of asset with given id in world state, and returns the old owner.
+func (s *SmartContract) TransferAsset(ctx contractapi.TransactionContextInterface, id string, newOwner string) (string, error) {
+	asset, err := s.ReadAsset(ctx, id)
+	if err != nil {
+		return "", err
+	}
+
+	oldOwner := asset.Owner
+	asset.Owner = newOwner
+
+	assetJSON, err := json.Marshal(asset)
+	if err != nil {
+		return "", err
+	}
+
+	err = ctx.GetStub().PutState(id, assetJSON)
+	if err != nil {
+		return "", err
+	}
+
+	return oldOwner, nil
+}
+
+// GetAllAssets returns all assets found in world state
+func (s *SmartContract) GetAllAssets(ctx contractapi.TransactionContextInterface) ([]*Asset, error) {
+	// range query with empty string for startKey and endKey does an
+	// open-ended query of all assets in the chaincode namespace.
+	resultsIterator, err := ctx.GetStub().GetStateByRange("", "")
+	if err != nil {
+		return nil, err
+	}
+	defer resultsIterator.Close()
+
+	var assets []*Asset
+	for resultsIterator.HasNext() {
+		queryResponse, err := resultsIterator.Next()
+		if err != nil {
+			return nil, err
+		}
+
+		var asset Asset
+		err = json.Unmarshal(queryResponse.Value, &asset)
+		if err != nil {
+			return nil, err
+		}
+		assets = append(assets, &asset)
+	}
+
+	return assets, nil
+}

asset-transfer-basic/chaincode-go/chaincode/smartcontract_test.go

@@ -0,0 +1,184 @@
+package chaincode_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+
+	"github.com/hyperledger/fabric-chaincode-go/v2/shim"
+	"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
+	"github.com/hyperledger/fabric-protos-go-apiv2/ledger/queryresult"
+	"github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-go/chaincode"
+	"github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-go/chaincode/mocks"
+	"github.com/stretchr/testify/require"
+)
+
+//go:generate counterfeiter -o mocks/transaction.go -fake-name TransactionContext . transactionContext
+type transactionContext interface {
+	contractapi.TransactionContextInterface
+}
+
+//go:generate counterfeiter -o mocks/chaincodestub.go -fake-name ChaincodeStub . chaincodeStub
+type chaincodeStub interface {
+	shim.ChaincodeStubInterface
+}
+
+//go:generate counterfeiter -o mocks/statequeryiterator.go -fake-name StateQueryIterator . stateQueryIterator
+type stateQueryIterator interface {
+	shim.StateQueryIteratorInterface
+}
+
+func TestInitLedger(t *testing.T) {
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	assetTransfer := chaincode.SmartContract{}
+	err := assetTransfer.InitLedger(transactionContext)
+	require.NoError(t, err)
+
+	chaincodeStub.PutStateReturns(fmt.Errorf("failed inserting key"))
+	err = assetTransfer.InitLedger(transactionContext)
+	require.EqualError(t, err, "failed to put to world state. failed inserting key")
+}
+
+func TestCreateAsset(t *testing.T) {
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	assetTransfer := chaincode.SmartContract{}
+	err := assetTransfer.CreateAsset(transactionContext, "", "", 0, "", 0)
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns([]byte{}, nil)
+	err = assetTransfer.CreateAsset(transactionContext, "asset1", "", 0, "", 0)
+	require.EqualError(t, err, "the asset asset1 already exists")
+
+	chaincodeStub.GetStateReturns(nil, fmt.Errorf("unable to retrieve asset"))
+	err = assetTransfer.CreateAsset(transactionContext, "asset1", "", 0, "", 0)
+	require.EqualError(t, err, "failed to read from world state: unable to retrieve asset")
+}
+
+func TestReadAsset(t *testing.T) {
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	expectedAsset := &chaincode.Asset{ID: "asset1"}
+	bytes, err := json.Marshal(expectedAsset)
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(bytes, nil)
+	assetTransfer := chaincode.SmartContract{}
+	asset, err := assetTransfer.ReadAsset(transactionContext, "")
+	require.NoError(t, err)
+	require.Equal(t, expectedAsset, asset)
+
+	chaincodeStub.GetStateReturns(nil, fmt.Errorf("unable to retrieve asset"))
+	_, err = assetTransfer.ReadAsset(transactionContext, "")
+	require.EqualError(t, err, "failed to read from world state: unable to retrieve asset")
+
+	chaincodeStub.GetStateReturns(nil, nil)
+	asset, err = assetTransfer.ReadAsset(transactionContext, "asset1")
+	require.EqualError(t, err, "the asset asset1 does not exist")
+	require.Nil(t, asset)
+}
+
+func TestUpdateAsset(t *testing.T) {
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	expectedAsset := &chaincode.Asset{ID: "asset1"}
+	bytes, err := json.Marshal(expectedAsset)
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(bytes, nil)
+	assetTransfer := chaincode.SmartContract{}
+	err = assetTransfer.UpdateAsset(transactionContext, "", "", 0, "", 0)
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(nil, nil)
+	err = assetTransfer.UpdateAsset(transactionContext, "asset1", "", 0, "", 0)
+	require.EqualError(t, err, "the asset asset1 does not exist")
+
+	chaincodeStub.GetStateReturns(nil, fmt.Errorf("unable to retrieve asset"))
+	err = assetTransfer.UpdateAsset(transactionContext, "asset1", "", 0, "", 0)
+	require.EqualError(t, err, "failed to read from world state: unable to retrieve asset")
+}
+
+func TestDeleteAsset(t *testing.T) {
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	asset := &chaincode.Asset{ID: "asset1"}
+	bytes, err := json.Marshal(asset)
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(bytes, nil)
+	chaincodeStub.DelStateReturns(nil)
+	assetTransfer := chaincode.SmartContract{}
+	err = assetTransfer.DeleteAsset(transactionContext, "")
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(nil, nil)
+	err = assetTransfer.DeleteAsset(transactionContext, "asset1")
+	require.EqualError(t, err, "the asset asset1 does not exist")
+
+	chaincodeStub.GetStateReturns(nil, fmt.Errorf("unable to retrieve asset"))
+	err = assetTransfer.DeleteAsset(transactionContext, "")
+	require.EqualError(t, err, "failed to read from world state: unable to retrieve asset")
+}
+
+func TestTransferAsset(t *testing.T) {
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	asset := &chaincode.Asset{ID: "asset1"}
+	bytes, err := json.Marshal(asset)
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(bytes, nil)
+	assetTransfer := chaincode.SmartContract{}
+	_, err = assetTransfer.TransferAsset(transactionContext, "", "")
+	require.NoError(t, err)
+
+	chaincodeStub.GetStateReturns(nil, fmt.Errorf("unable to retrieve asset"))
+	_, err = assetTransfer.TransferAsset(transactionContext, "", "")
+	require.EqualError(t, err, "failed to read from world state: unable to retrieve asset")
+}
+
+func TestGetAllAssets(t *testing.T) {
+	asset := &chaincode.Asset{ID: "asset1"}
+	bytes, err := json.Marshal(asset)
+	require.NoError(t, err)
+
+	iterator := &mocks.StateQueryIterator{}
+	iterator.HasNextReturnsOnCall(0, true)
+	iterator.HasNextReturnsOnCall(1, false)
+	iterator.NextReturns(&queryresult.KV{Value: bytes}, nil)
+
+	chaincodeStub := &mocks.ChaincodeStub{}
+	transactionContext := &mocks.TransactionContext{}
+	transactionContext.GetStubReturns(chaincodeStub)
+
+	chaincodeStub.GetStateByRangeReturns(iterator, nil)
+	assetTransfer := &chaincode.SmartContract{}
+	assets, err := assetTransfer.GetAllAssets(transactionContext)
+	require.NoError(t, err)
+	require.Equal(t, []*chaincode.Asset{asset}, assets)
+
+	iterator.HasNextReturns(true)
+	iterator.NextReturns(nil, fmt.Errorf("failed retrieving next item"))
+	assets, err = assetTransfer.GetAllAssets(transactionContext)
+	require.EqualError(t, err, "failed retrieving next item")
+	require.Nil(t, assets)
+
+	chaincodeStub.GetStateByRangeReturns(nil, fmt.Errorf("failed retrieving all assets"))
+	assets, err = assetTransfer.GetAllAssets(transactionContext)
+	require.EqualError(t, err, "failed retrieving all assets")
+	require.Nil(t, assets)
+}

asset-transfer-basic/chaincode-go/go.mod

@@ -0,0 +1,31 @@
+module github.com/hyperledger/fabric-samples/asset-transfer-basic/chaincode-go
+
+go 1.23.0
+
+require (
+	github.com/hyperledger/fabric-chaincode-go/v2 v2.0.0
+	github.com/hyperledger/fabric-contract-api-go/v2 v2.2.0
+	github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4
+	github.com/stretchr/testify v1.10.0
+	google.golang.org/protobuf v1.36.4
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-openapi/jsonpointer v0.21.0 // indirect
+	github.com/go-openapi/jsonreference v0.21.0 // indirect
+	github.com/go-openapi/spec v0.21.0 // indirect
+	github.com/go-openapi/swag v0.23.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
+	golang.org/x/net v0.38.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
+	google.golang.org/grpc v1.71.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

asset-transfer-basic/chaincode-go/go.sum

@@ -0,0 +1,81 @@
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+github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17UxZ74=
+github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
+go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
+go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
+go.opentelemetry.io/otel v1.34.0 h1:zRLXxLCgL1WyKsPVrgbSdMN4c0FMkDAskSTQP+0hdUY=
+go.opentelemetry.io/otel v1.34.0/go.mod h1:OWFPOQ+h4G8xpyjgqo4SxJYdDQ/qmRH+wivy7zzx9oI=
+go.opentelemetry.io/otel/metric v1.34.0 h1:+eTR3U0MyfWjRDhmFMxe2SsW64QrZ84AOhvqS7Y+PoQ=
+go.opentelemetry.io/otel/metric v1.34.0/go.mod h1:CEDrp0fy2D0MvkXE+dPV7cMi8tWZwX3dmaIhwPOaqHE=
+go.opentelemetry.io/otel/sdk v1.34.0 h1:95zS4k/2GOy069d321O8jWgYsW3MzVV+KuSPKp7Wr1A=
+go.opentelemetry.io/otel/sdk v1.34.0/go.mod h1:0e/pNiaMAqaykJGKbi+tSjWfNNHMTxoC9qANsCzbyxU=
+go.opentelemetry.io/otel/sdk/metric v1.34.0 h1:5CeK9ujjbFVL5c1PhLuStg1wxA7vQv7ce1EK0Gyvahk=
+go.opentelemetry.io/otel/sdk/metric v1.34.0/go.mod h1:jQ/r8Ze28zRKoNRdkjCZxfs6YvBTG1+YIqyFVFYec5w=
+go.opentelemetry.io/otel/trace v1.34.0 h1:+ouXS2V8Rd4hp4580a8q23bg0azF2nI8cqLYnC8mh/k=
+go.opentelemetry.io/otel/trace v1.34.0/go.mod h1:Svm7lSjQD7kG7KJ/MUHPVXSDGz2OX4h0M2jHBhmSfRE=
+golang.org/x/net v0.38.0 h1:vRMAPTMaeGqVhG5QyLJHqNDwecKTomGeqbnfZyKlBI8=
+golang.org/x/net v0.38.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
+golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
+golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/text v0.23.0 h1:D71I7dUrlY+VX0gQShAThNGHFxZ13dGLBHQLVl1mJlY=
+golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4=
+google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 h1:KpwkzHKEF7B9Zxg18WzOa7djJ+Ha5DzthMyZYQfEn2A=
+google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1/go.mod h1:nKE/iIaLqn2bQwXBg8f1g2Ylh6r5MN5CmZvuzZCgsCU=
+google.golang.org/grpc v1.71.0 h1:kF77BGdPTQ4/JZWMlb9VpJ5pa25aqvVqogsxNHHdeBg=
+google.golang.org/grpc v1.71.0/go.mod h1:H0GRtasmQOh9LkFoCPDu3ZrwUtD1YGE+b2vYBYd/8Ec=
+google.golang.org/protobuf v1.36.4 h1:6A3ZDJHn/eNqc1i+IdefRzy/9PokBTPvcqMySR7NNIM=
+google.golang.org/protobuf v1.36.4/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

asset-transfer-basic/chaincode-java/.gitattributes

@@ -0,0 +1,6 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat           text eol=crlf
+

asset-transfer-basic/chaincode-java/.gitignore

@@ -0,0 +1,2 @@
+.idea/
+.gradle/

asset-transfer-basic/chaincode-java/Dockerfile

@@ -0,0 +1,31 @@
+# the first stage
+FROM gradle:9-jdk25 AS gradle_build
+
+# copy the build.gradle and src code to the container
+COPY src/ src/
+COPY build.gradle ./
+
+# Build and package our code
+RUN gradle --no-daemon build shadowJar -x checkstyleMain -x checkstyleTest
+
+
+# the second stage of our build just needs the compiled files
+FROM eclipse-temurin:25-jre
+ARG CC_SERVER_PORT=9999
+
+# Setup tini to work better handle signals
+ENV TINI_VERSION=v0.19.0
+ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /tini
+RUN chmod +x /tini
+
+RUN addgroup --system javauser && useradd -g javauser javauser
+
+# copy only the artifacts we need from the first stage and discard the rest
+COPY --chown=javauser:javauser --from=gradle_build /home/gradle/build/libs/chaincode.jar /chaincode.jar
+COPY --chown=javauser:javauser docker/docker-entrypoint.sh /docker-entrypoint.sh
+
+ENV PORT=$CC_SERVER_PORT
+EXPOSE $CC_SERVER_PORT
+
+USER javauser
+ENTRYPOINT [ "/tini", "--", "/docker-entrypoint.sh" ]

asset-transfer-basic/chaincode-java/README.md

@@ -0,0 +1,10 @@
+
+## Basic Asset Transfer 
+
+This sample implements the basic asset transfer scenario, illustrating the use of the Java Contract SDKs to provide a 
+smart contract as a service.  
+
+To run this chaincode contract locally on a development network, see: 
+
+- [Debugging chaincode as a service](../../test-network-k8s/docs/CHAINCODE_AS_A_SERVICE.md) (Kube test network)
+- [End-to-end with the test-network](../../test-network/CHAINCODE_AS_A_SERVICE_TUTORIAL.md#end-to-end-with-the-the-test-network) (Docker compose)

asset-transfer-basic/chaincode-java/build.gradle

@@ -0,0 +1,91 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+plugins {
+    id 'com.gradleup.shadow' version '9.2.2'
+    id 'application'
+    id 'checkstyle'
+    id 'jacoco'
+}
+
+group 'org.hyperledger.fabric.samples'
+version '1.0-SNAPSHOT'
+
+dependencies {
+    implementation 'org.hyperledger.fabric-chaincode-java:fabric-chaincode-shim:2.5.+'
+    implementation 'org.json:json:+'
+    implementation 'com.owlike:genson:1.6'
+    testImplementation platform('org.junit:junit-bom:5.14.0')
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+    testImplementation 'org.assertj:assertj-core:3.27.6'
+    testImplementation 'org.mockito:mockito-core:5.20.0'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+repositories {
+    mavenCentral()
+    maven {
+        url 'https://jitpack.io'
+    }
+}
+
+compileJava {
+    options.release = 11
+}
+
+application {
+    mainClass = 'org.hyperledger.fabric.contract.ContractRouter'
+}
+
+checkstyle {
+    toolVersion '8.21'
+    configFile file("config/checkstyle/checkstyle.xml")
+}
+
+checkstyleMain {
+    source ='src/main/java'
+}
+
+checkstyleTest {
+    source ='src/test/java'
+}
+
+jacocoTestReport {
+    dependsOn test
+}
+
+jacocoTestCoverageVerification {
+    violationRules {
+        rule {
+            limit {
+                minimum = 0.9
+            }
+        }
+    }
+
+    finalizedBy jacocoTestReport
+}
+
+test {
+    useJUnitPlatform()
+    testLogging {
+        events "passed", "skipped", "failed"
+    }
+}
+
+shadowJar {
+    archiveBaseName = 'chaincode'
+    archiveVersion = ''
+    archiveClassifier = ''
+
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
+    mergeServiceFiles()
+
+    manifest {
+        attributes 'Main-Class': 'org.hyperledger.fabric.contract.ContractRouter'
+    }
+}
+
+check.dependsOn jacocoTestCoverageVerification
+installDist.dependsOn check

asset-transfer-basic/chaincode-java/config/checkstyle/checkstyle.xml

@@ -0,0 +1,171 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+          "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+          "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+
+  Checkstyle configuration that matches the Eclipse formatter
+
+  Checkstyle is very configurable. Be sure to read the documentation at
+  http://checkstyle.sourceforge.net (or in your downloaded distribution).
+
+  Most Checks are configurable, be sure to consult the documentation.
+
+  To completely disable a check, just comment it out or delete it from the file.
+
+  Finally, it is worth reading the documentation.
+
+-->
+
+<module name="Checker">
+    <!--
+        If you set the basedir property below, then all reported file
+        names will be relative to the specified directory. See
+        https://checkstyle.org/5.x/config.html#Checker
+
+        <property name="basedir" value="${basedir}"/>
+    -->
+
+    <property name="fileExtensions" value="java, properties, xml"/>
+
+    <module name="SuppressionFilter">
+        <property name="file" value="${config_loc}/suppressions.xml"/>
+        <property name="optional" value="false"/>
+    </module>
+
+    <!-- Excludes all 'module-info.java' files              -->
+    <!-- See https://checkstyle.org/config_filefilters.html -->
+    <module name="BeforeExecutionExclusionFileFilter">
+        <property name="fileNamePattern" value="module\-info\.java$"/>
+    </module>
+
+    <!-- Checks that a package-info.java file exists for each package.     -->
+    <!-- See http://checkstyle.sourceforge.net/config_javadoc.html#JavadocPackage -->
+    <!-- <module name="JavadocPackage"/> -->
+
+    <!-- Checks whether files end with a new line.                        -->
+    <!-- See http://checkstyle.sourceforge.net/config_misc.html#NewlineAtEndOfFile -->
+    <module name="NewlineAtEndOfFile"/>
+
+    <!-- Checks that property files contain the same keys.         -->
+    <!-- See http://checkstyle.sourceforge.net/config_misc.html#Translation -->
+    <module name="Translation"/>
+
+    <!-- Checks for Size Violations.                    -->
+    <!-- See http://checkstyle.sourceforge.net/config_sizes.html -->
+    <module name="FileLength"/>
+
+    <!-- Checks for whitespace                               -->
+    <!-- See http://checkstyle.sourceforge.net/config_whitespace.html -->
+    <module name="FileTabCharacter"/>
+
+	<!-- Miscellaneous other checks.                   -->	
+    <!-- See http://checkstyle.sourceforge.net/config_misc.html -->	
+    <module name="RegexpSingleline">	
+       <property name="format" value="\s+$"/>	
+       <property name="minimum" value="0"/>	
+       <property name="maximum" value="0"/>	
+       <property name="message" value="Line has trailing spaces."/>	
+    </module>
+
+    <!-- Checks for Headers                                -->
+    <!-- See http://checkstyle.sourceforge.net/config_header.html   -->
+    <!-- <module name="Header"> -->
+    <!--   <property name="headerFile" value="${checkstyle.header.file}"/> -->
+    <!--   <property name="fileExtensions" value="java"/> -->
+    <!-- </module> -->
+
+    <module name="TreeWalker">
+
+        <!-- Checks for Javadoc comments.                     -->
+        <!-- See http://checkstyle.sourceforge.net/config_javadoc.html -->
+        <!-- <module name="JavadocMethod"/> -->
+        <!-- <module name="JavadocType"/> -->
+        <!-- <module name="JavadocVariable"/> -->
+        <!-- <module name="JavadocStyle"/> -->
+        <!-- <module name="MissingJavadocMethod"/> -->
+
+        <!-- Checks for Naming Conventions.                  -->
+        <!-- See http://checkstyle.sourceforge.net/config_naming.html -->
+        <module name="ConstantName"/>
+        <module name="LocalFinalVariableName"/>
+        <module name="LocalVariableName"/>
+        <module name="PackageName"/>
+        <module name="StaticVariableName"/>
+        <module name="TypeName"/>
+
+        <!-- Checks for imports                              -->
+        <!-- See http://checkstyle.sourceforge.net/config_import.html -->
+        <module name="AvoidStarImport"/>
+        <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
+        <module name="RedundantImport"/>
+        <module name="UnusedImports">
+            <property name="processJavadoc" value="false"/>
+        </module>
+
+        <!-- Checks for Size Violations.                    -->
+        <!-- See http://checkstyle.sourceforge.net/config_sizes.html -->
+        <module name="MethodLength"/>
+        <module name="ParameterNumber"/>
+
+        <!-- Checks for whitespace                               -->
+        <!-- See http://checkstyle.sourceforge.net/config_whitespace.html -->
+        <module name="EmptyForIteratorPad"/>
+        <module name="GenericWhitespace"/>
+        <module name="MethodParamPad"/>
+        <module name="NoWhitespaceAfter"/>
+        <module name="NoWhitespaceBefore"/>
+        <module name="OperatorWrap"/>
+        <module name="ParenPad"/>
+        <module name="TypecastParenPad"/>
+        <module name="WhitespaceAfter"/>
+        <module name="WhitespaceAround"/>
+
+        <!-- Modifier Checks                                    -->
+        <!-- See http://checkstyle.sourceforge.net/config_modifiers.html -->
+        <module name="ModifierOrder"/>
+        <module name="RedundantModifier"/>
+
+        <!-- Checks for blocks. You know, those {}'s         -->
+        <!-- See http://checkstyle.sourceforge.net/config_blocks.html -->
+        <module name="AvoidNestedBlocks"/>
+        <module name="EmptyBlock"/>
+        <module name="LeftCurly"/>
+        <module name="NeedBraces"/>
+        <module name="RightCurly"/>
+
+        <!-- Checks for common coding problems               -->
+        <!-- See http://checkstyle.sourceforge.net/config_coding.html -->
+        <module name="EmptyStatement"/>
+        <module name="EqualsHashCode"/>
+        <module name="HiddenField">
+            <property name="ignoreConstructorParameter" value="true"/>
+        </module>
+        <module name="IllegalInstantiation"/>
+        <module name="InnerAssignment"/>
+        <module name="MissingSwitchDefault"/>
+        <module name="MultipleVariableDeclarations"/>
+        <module name="SimplifyBooleanExpression"/>
+        <module name="SimplifyBooleanReturn"/>
+
+        <!-- Checks for class design                         -->
+        <!-- See http://checkstyle.sourceforge.net/config_design.html -->
+        <module name="DesignForExtension"/>
+        <module name="FinalClass"/>
+        <module name="HideUtilityClassConstructor"/>
+        <module name="InterfaceIsType"/>
+        <module name="VisibilityModifier">
+            <property name="allowPublicFinalFields" value="true"/>
+        </module>
+
+        <!-- Miscellaneous other checks.                   -->
+        <!-- See http://checkstyle.sourceforge.net/config_misc.html -->
+        <module name="ArrayTypeStyle"/>
+        <module name="FinalParameters"/>
+        <module name="TodoComment"/>
+        <module name="UpperEll"/>
+
+    </module>
+
+</module>

asset-transfer-basic/chaincode-java/config/checkstyle/suppressions.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+
+<!DOCTYPE suppressions PUBLIC
+    "-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
+    "https://checkstyle.org/dtds/suppressions_1_2.dtd">
+
+<suppressions>
+    <suppress files="ChaincodeTest.java" checks="ParameterNumber" />
+</suppressions>

asset-transfer-basic/chaincode-java/docker/docker-entrypoint.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+set -euo pipefail
+: ${CORE_PEER_TLS_ENABLED:="false"}
+: ${DEBUG:="false"}
+
+if [ "${DEBUG,,}" = "true" ]; then
+   exec java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=0.0.0.0:8000 -jar /chaincode.jar
+elif [ "${CORE_PEER_TLS_ENABLED,,}" = "true" ]; then
+   exec java -jar /chaincode.jar # todo
+else
+   exec java -jar /chaincode.jar
+fi
+

asset-transfer-basic/chaincode-java/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

asset-transfer-basic/chaincode-java/gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

asset-transfer-basic/chaincode-java/gradlew.bat

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

asset-transfer-basic/chaincode-java/settings.gradle

@@ -0,0 +1,4 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+rootProject.name = System.getenv('CHAINCODE_NAME') ?: 'basic'

asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/Asset.java

@@ -0,0 +1,93 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import java.util.Objects;
+
+import org.hyperledger.fabric.contract.annotation.DataType;
+import org.hyperledger.fabric.contract.annotation.Property;
+
+import com.owlike.genson.annotation.JsonProperty;
+
+@DataType()
+public final class Asset {
+
+    @Property()
+    private final String assetID;
+
+    @Property()
+    private final String color;
+
+    @Property()
+    private final int size;
+
+    @Property()
+    private final String owner;
+
+    @Property()
+    private final int appraisedValue;
+
+    public String getAssetID() {
+        return assetID;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public int getSize() {
+        return size;
+    }
+
+    public String getOwner() {
+        return owner;
+    }
+
+    public int getAppraisedValue() {
+        return appraisedValue;
+    }
+
+    public Asset(@JsonProperty("assetID") final String assetID, @JsonProperty("color") final String color,
+            @JsonProperty("size") final int size, @JsonProperty("owner") final String owner,
+            @JsonProperty("appraisedValue") final int appraisedValue) {
+        this.assetID = assetID;
+        this.color = color;
+        this.size = size;
+        this.owner = owner;
+        this.appraisedValue = appraisedValue;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if ((obj == null) || (getClass() != obj.getClass())) {
+            return false;
+        }
+
+        Asset other = (Asset) obj;
+
+        return Objects.deepEquals(
+                new String[] {getAssetID(), getColor(), getOwner()},
+                new String[] {other.getAssetID(), other.getColor(), other.getOwner()})
+                &&
+                Objects.deepEquals(
+                new int[] {getSize(), getAppraisedValue()},
+                new int[] {other.getSize(), other.getAppraisedValue()});
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getAssetID(), getColor(), getSize(), getOwner(), getAppraisedValue());
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getSimpleName() + "@" + Integer.toHexString(hashCode()) + " [assetID=" + assetID + ", color="
+                + color + ", size=" + size + ", owner=" + owner + ", appraisedValue=" + appraisedValue + "]";
+    }
+}

asset-transfer-basic/chaincode-java/src/main/java/org/hyperledger/fabric/samples/assettransfer/AssetTransfer.java

@@ -0,0 +1,223 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+import org.hyperledger.fabric.contract.Context;
+import org.hyperledger.fabric.contract.ContractInterface;
+import org.hyperledger.fabric.contract.annotation.Contact;
+import org.hyperledger.fabric.contract.annotation.Contract;
+import org.hyperledger.fabric.contract.annotation.Default;
+import org.hyperledger.fabric.contract.annotation.Info;
+import org.hyperledger.fabric.contract.annotation.License;
+import org.hyperledger.fabric.contract.annotation.Transaction;
+import org.hyperledger.fabric.shim.ChaincodeException;
+import org.hyperledger.fabric.shim.ChaincodeStub;
+import org.hyperledger.fabric.shim.ledger.KeyValue;
+import org.hyperledger.fabric.shim.ledger.QueryResultsIterator;
+
+import com.owlike.genson.Genson;
+
+@Contract(
+        name = "basic",
+        info = @Info(
+                title = "Asset Transfer",
+                description = "The hyperlegendary asset transfer",
+                version = "0.0.1-SNAPSHOT",
+                license = @License(
+                        name = "Apache 2.0 License",
+                        url = "http://www.apache.org/licenses/LICENSE-2.0.html"),
+                contact = @Contact(
+                        email = "a.transfer@example.com",
+                        name = "Adrian Transfer",
+                        url = "https://hyperledger.example.com")))
+@Default
+public final class AssetTransfer implements ContractInterface {
+
+    private final Genson genson = new Genson();
+
+    private enum AssetTransferErrors {
+        ASSET_NOT_FOUND,
+        ASSET_ALREADY_EXISTS
+    }
+
+    /**
+     * Creates some initial assets on the ledger.
+     *
+     * @param ctx the transaction context
+     */
+    @Transaction(intent = Transaction.TYPE.SUBMIT)
+    public void InitLedger(final Context ctx) {
+        putAsset(ctx, new Asset("asset1", "blue", 5, "Tomoko", 300));
+        putAsset(ctx, new Asset("asset2", "red", 5, "Brad", 400));
+        putAsset(ctx, new Asset("asset3", "green", 10, "Jin Soo", 500));
+        putAsset(ctx, new Asset("asset4", "yellow", 10, "Max", 600));
+        putAsset(ctx, new Asset("asset5", "black", 15, "Adrian", 700));
+        putAsset(ctx, new Asset("asset6", "white", 15, "Michel", 700));
+
+    }
+
+    /**
+     * Creates a new asset on the ledger.
+     *
+     * @param ctx the transaction context
+     * @param assetID the ID of the new asset
+     * @param color the color of the new asset
+     * @param size the size for the new asset
+     * @param owner the owner of the new asset
+     * @param appraisedValue the appraisedValue of the new asset
+     * @return the created asset
+     */
+    @Transaction(intent = Transaction.TYPE.SUBMIT)
+    public Asset CreateAsset(final Context ctx, final String assetID, final String color, final int size,
+        final String owner, final int appraisedValue) {
+
+        if (AssetExists(ctx, assetID)) {
+            String errorMessage = String.format("Asset %s already exists", assetID);
+            System.out.println(errorMessage);
+            throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_ALREADY_EXISTS.toString());
+        }
+
+        return putAsset(ctx, new Asset(assetID, color, size, owner, appraisedValue));
+    }
+
+    private Asset putAsset(final Context ctx, final Asset asset) {
+        // Use Genson to convert the Asset into string, sort it alphabetically and serialize it into a json string
+        String sortedJson = genson.serialize(asset);
+        ctx.getStub().putStringState(asset.getAssetID(), sortedJson);
+
+        return asset;
+    }
+
+    /**
+     * Retrieves an asset with the specified ID from the ledger.
+     *
+     * @param ctx the transaction context
+     * @param assetID the ID of the asset
+     * @return the asset found on the ledger if there was one
+     */
+    @Transaction(intent = Transaction.TYPE.EVALUATE)
+    public Asset ReadAsset(final Context ctx, final String assetID) {
+        String assetJSON = ctx.getStub().getStringState(assetID);
+
+        if (assetJSON == null || assetJSON.isEmpty()) {
+            String errorMessage = String.format("Asset %s does not exist", assetID);
+            System.out.println(errorMessage);
+            throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+        }
+
+        return genson.deserialize(assetJSON, Asset.class);
+    }
+
+    /**
+     * Updates the properties of an asset on the ledger.
+     *
+     * @param ctx the transaction context
+     * @param assetID the ID of the asset being updated
+     * @param color the color of the asset being updated
+     * @param size the size of the asset being updated
+     * @param owner the owner of the asset being updated
+     * @param appraisedValue the appraisedValue of the asset being updated
+     * @return the transferred asset
+     */
+    @Transaction(intent = Transaction.TYPE.SUBMIT)
+    public Asset UpdateAsset(final Context ctx, final String assetID, final String color, final int size,
+        final String owner, final int appraisedValue) {
+
+        if (!AssetExists(ctx, assetID)) {
+            String errorMessage = String.format("Asset %s does not exist", assetID);
+            System.out.println(errorMessage);
+            throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+        }
+
+        return putAsset(ctx, new Asset(assetID, color, size, owner, appraisedValue));
+    }
+
+    /**
+     * Deletes asset on the ledger.
+     *
+     * @param ctx the transaction context
+     * @param assetID the ID of the asset being deleted
+     */
+    @Transaction(intent = Transaction.TYPE.SUBMIT)
+    public void DeleteAsset(final Context ctx, final String assetID) {
+        if (!AssetExists(ctx, assetID)) {
+            String errorMessage = String.format("Asset %s does not exist", assetID);
+            System.out.println(errorMessage);
+            throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+        }
+
+        ctx.getStub().delState(assetID);
+    }
+
+    /**
+     * Checks the existence of the asset on the ledger
+     *
+     * @param ctx the transaction context
+     * @param assetID the ID of the asset
+     * @return boolean indicating the existence of the asset
+     */
+    @Transaction(intent = Transaction.TYPE.EVALUATE)
+    public boolean AssetExists(final Context ctx, final String assetID) {
+        String assetJSON = ctx.getStub().getStringState(assetID);
+
+        return (assetJSON != null && !assetJSON.isEmpty());
+    }
+
+    /**
+     * Changes the owner of a asset on the ledger.
+     *
+     * @param ctx the transaction context
+     * @param assetID the ID of the asset being transferred
+     * @param newOwner the new owner
+     * @return the old owner
+     */
+    @Transaction(intent = Transaction.TYPE.SUBMIT)
+    public String TransferAsset(final Context ctx, final String assetID, final String newOwner) {
+        String assetJSON = ctx.getStub().getStringState(assetID);
+
+        if (assetJSON == null || assetJSON.isEmpty()) {
+            String errorMessage = String.format("Asset %s does not exist", assetID);
+            System.out.println(errorMessage);
+            throw new ChaincodeException(errorMessage, AssetTransferErrors.ASSET_NOT_FOUND.toString());
+        }
+
+        Asset asset = genson.deserialize(assetJSON, Asset.class);
+
+        putAsset(ctx, new Asset(asset.getAssetID(), asset.getColor(), asset.getSize(), newOwner, asset.getAppraisedValue()));
+
+        return asset.getOwner();
+    }
+
+    /**
+     * Retrieves all assets from the ledger.
+     *
+     * @param ctx the transaction context
+     * @return array of assets found on the ledger
+     */
+    @Transaction(intent = Transaction.TYPE.EVALUATE)
+    public String GetAllAssets(final Context ctx) {
+        ChaincodeStub stub = ctx.getStub();
+
+        List<Asset> queryResults = new ArrayList<>();
+
+        // To retrieve all assets from the ledger use getStateByRange with empty startKey & endKey.
+        // Giving empty startKey & endKey is interpreted as all the keys from beginning to end.
+        // As another example, if you use startKey = 'asset0', endKey = 'asset9' ,
+        // then getStateByRange will retrieve asset with keys between asset0 (inclusive) and asset9 (exclusive) in lexical order.
+        QueryResultsIterator<KeyValue> results = stub.getStateByRange("", "");
+
+        for (KeyValue result: results) {
+            Asset asset = genson.deserialize(result.getStringValue(), Asset.class);
+            System.out.println(asset);
+            queryResults.add(asset);
+        }
+
+        return genson.serialize(queryResults);
+    }
+}

asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTest.java

@@ -0,0 +1,74 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+public final class AssetTest {
+
+    @Nested
+    class Equality {
+
+        @Test
+        public void isReflexive() {
+            Asset asset = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+            assertThat(asset).isEqualTo(asset);
+        }
+
+        @Test
+        public void isSymmetric() {
+            Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+            Asset assetB = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+            assertThat(assetA).isEqualTo(assetB);
+            assertThat(assetB).isEqualTo(assetA);
+        }
+
+        @Test
+        public void isTransitive() {
+            Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+            Asset assetB = new Asset("asset1", "Blue", 20, "Guy", 100);
+            Asset assetC = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+            assertThat(assetA).isEqualTo(assetB);
+            assertThat(assetB).isEqualTo(assetC);
+            assertThat(assetA).isEqualTo(assetC);
+        }
+
+        @Test
+        public void handlesInequality() {
+            Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+            Asset assetB = new Asset("asset2", "Red", 40, "Lady", 200);
+
+            assertThat(assetA).isNotEqualTo(assetB);
+        }
+
+        @Test
+        public void handlesOtherObjects() {
+            Asset assetA = new Asset("asset1", "Blue", 20, "Guy", 100);
+            String assetB = "not a asset";
+
+            assertThat(assetA).isNotEqualTo(assetB);
+        }
+
+        @Test
+        public void handlesNull() {
+            Asset asset = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+            assertThat(asset).isNotEqualTo(null);
+        }
+    }
+
+    @Test
+    public void toStringIdentifiesAsset() {
+        Asset asset = new Asset("asset1", "Blue", 20, "Guy", 100);
+
+        assertThat(asset.toString()).isEqualTo("Asset@e04f6c53 [assetID=asset1, color=Blue, size=20, owner=Guy, appraisedValue=100]");
+    }
+}

asset-transfer-basic/chaincode-java/src/test/java/org/hyperledger/fabric/samples/assettransfer/AssetTransferTest.java

@@ -0,0 +1,305 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.hyperledger.fabric.samples.assettransfer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.ThrowableAssert.catchThrowable;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verifyNoInteractions;
+import static org.mockito.Mockito.when;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.hyperledger.fabric.contract.Context;
+import org.hyperledger.fabric.shim.ChaincodeException;
+import org.hyperledger.fabric.shim.ChaincodeStub;
+import org.hyperledger.fabric.shim.ledger.KeyValue;
+import org.hyperledger.fabric.shim.ledger.QueryResultsIterator;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.mockito.InOrder;
+
+public final class AssetTransferTest {
+
+    private static final class MockKeyValue implements KeyValue {
+
+        private final String key;
+        private final String value;
+
+        MockKeyValue(final String key, final String value) {
+            super();
+            this.key = key;
+            this.value = value;
+        }
+
+        @Override
+        public String getKey() {
+            return this.key;
+        }
+
+        @Override
+        public String getStringValue() {
+            return this.value;
+        }
+
+        @Override
+        public byte[] getValue() {
+            return this.value.getBytes();
+        }
+
+    }
+
+    private static final class MockAssetResultsIterator implements QueryResultsIterator<KeyValue> {
+
+        private final List<KeyValue> assetList;
+
+        MockAssetResultsIterator() {
+            super();
+
+            assetList = new ArrayList<KeyValue>();
+
+            assetList.add(new MockKeyValue("asset1",
+                    "{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }"));
+            assetList.add(new MockKeyValue("asset2",
+                    "{ \"assetID\": \"asset2\", \"color\": \"red\", \"size\": 5,\"owner\": \"Brad\", \"appraisedValue\": 400 }"));
+            assetList.add(new MockKeyValue("asset3",
+                    "{ \"assetID\": \"asset3\", \"color\": \"green\", \"size\": 10,\"owner\": \"Jin Soo\", \"appraisedValue\": 500 }"));
+            assetList.add(new MockKeyValue("asset4",
+                    "{ \"assetID\": \"asset4\", \"color\": \"yellow\", \"size\": 10,\"owner\": \"Max\", \"appraisedValue\": 600 }"));
+            assetList.add(new MockKeyValue("asset5",
+                    "{ \"assetID\": \"asset5\", \"color\": \"black\", \"size\": 15,\"owner\": \"Adrian\", \"appraisedValue\": 700 }"));
+            assetList.add(new MockKeyValue("asset6",
+                    "{ \"assetID\": \"asset6\", \"color\": \"white\", \"size\": 15,\"owner\": \"Michel\", \"appraisedValue\": 800 }"));
+        }
+
+        @Override
+        public Iterator<KeyValue> iterator() {
+            return assetList.iterator();
+        }
+
+        @Override
+        public void close() {
+            // do nothing
+        }
+
+    }
+
+    @Test
+    public void invokeUnknownTransaction() {
+        AssetTransfer contract = new AssetTransfer();
+        Context ctx = mock(Context.class);
+
+        Throwable thrown = catchThrowable(() -> {
+            contract.unknownTransaction(ctx);
+        });
+
+        assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+                .hasMessage("Undefined contract method called");
+        assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo(null);
+
+        verifyNoInteractions(ctx);
+    }
+
+    @Nested
+    class InvokeReadAssetTransaction {
+
+        @Test
+        public void whenAssetExists() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1"))
+                    .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }");
+
+            Asset asset = contract.ReadAsset(ctx, "asset1");
+
+            assertThat(asset).isEqualTo(new Asset("asset1", "blue", 5, "Tomoko", 300));
+        }
+
+        @Test
+        public void whenAssetDoesNotExist() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1")).thenReturn("");
+
+            Throwable thrown = catchThrowable(() -> {
+                contract.ReadAsset(ctx, "asset1");
+            });
+
+            assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+                    .hasMessage("Asset asset1 does not exist");
+            assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+        }
+    }
+
+    @Test
+    void invokeInitLedgerTransaction() {
+        AssetTransfer contract = new AssetTransfer();
+        Context ctx = mock(Context.class);
+        ChaincodeStub stub = mock(ChaincodeStub.class);
+        when(ctx.getStub()).thenReturn(stub);
+
+        contract.InitLedger(ctx);
+
+        InOrder inOrder = inOrder(stub);
+        inOrder.verify(stub).putStringState("asset1", "{\"appraisedValue\":300,\"assetID\":\"asset1\",\"color\":\"blue\",\"owner\":\"Tomoko\",\"size\":5}");
+        inOrder.verify(stub).putStringState("asset2", "{\"appraisedValue\":400,\"assetID\":\"asset2\",\"color\":\"red\",\"owner\":\"Brad\",\"size\":5}");
+        inOrder.verify(stub).putStringState("asset3", "{\"appraisedValue\":500,\"assetID\":\"asset3\",\"color\":\"green\",\"owner\":\"Jin Soo\",\"size\":10}");
+        inOrder.verify(stub).putStringState("asset4", "{\"appraisedValue\":600,\"assetID\":\"asset4\",\"color\":\"yellow\",\"owner\":\"Max\",\"size\":10}");
+        inOrder.verify(stub).putStringState("asset5", "{\"appraisedValue\":700,\"assetID\":\"asset5\",\"color\":\"black\",\"owner\":\"Adrian\",\"size\":15}");
+
+    }
+
+    @Nested
+    class InvokeCreateAssetTransaction {
+
+        @Test
+        public void whenAssetExists() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1"))
+                    .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }");
+
+            Throwable thrown = catchThrowable(() -> {
+                contract.CreateAsset(ctx, "asset1", "blue", 45, "Siobhán", 60);
+            });
+
+            assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+                    .hasMessage("Asset asset1 already exists");
+            assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_ALREADY_EXISTS".getBytes());
+        }
+
+        @Test
+        public void whenAssetDoesNotExist() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1")).thenReturn("");
+
+            Asset asset = contract.CreateAsset(ctx, "asset1", "blue", 45, "Siobhán", 60);
+
+            assertThat(asset).isEqualTo(new Asset("asset1", "blue", 45, "Siobhán", 60));
+        }
+    }
+
+    @Test
+    void invokeGetAllAssetsTransaction() {
+        AssetTransfer contract = new AssetTransfer();
+        Context ctx = mock(Context.class);
+        ChaincodeStub stub = mock(ChaincodeStub.class);
+        when(ctx.getStub()).thenReturn(stub);
+        when(stub.getStateByRange("", "")).thenReturn(new MockAssetResultsIterator());
+
+        String assets = contract.GetAllAssets(ctx);
+
+        assertThat(assets).isEqualTo("[{\"appraisedValue\":300,\"assetID\":\"asset1\",\"color\":\"blue\",\"owner\":\"Tomoko\",\"size\":5},"
+                + "{\"appraisedValue\":400,\"assetID\":\"asset2\",\"color\":\"red\",\"owner\":\"Brad\",\"size\":5},"
+                + "{\"appraisedValue\":500,\"assetID\":\"asset3\",\"color\":\"green\",\"owner\":\"Jin Soo\",\"size\":10},"
+                + "{\"appraisedValue\":600,\"assetID\":\"asset4\",\"color\":\"yellow\",\"owner\":\"Max\",\"size\":10},"
+                + "{\"appraisedValue\":700,\"assetID\":\"asset5\",\"color\":\"black\",\"owner\":\"Adrian\",\"size\":15},"
+                + "{\"appraisedValue\":800,\"assetID\":\"asset6\",\"color\":\"white\",\"owner\":\"Michel\",\"size\":15}]");
+
+    }
+
+    @Nested
+    class TransferAssetTransaction {
+
+        @Test
+        public void whenAssetExists() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1"))
+                    .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 5, \"owner\": \"Tomoko\", \"appraisedValue\": 300 }");
+
+            String oldOwner = contract.TransferAsset(ctx, "asset1", "Dr Evil");
+
+            assertThat(oldOwner).isEqualTo("Tomoko");
+        }
+
+        @Test
+        public void whenAssetDoesNotExist() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1")).thenReturn("");
+
+            Throwable thrown = catchThrowable(() -> {
+                contract.TransferAsset(ctx, "asset1", "Dr Evil");
+            });
+
+            assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+                    .hasMessage("Asset asset1 does not exist");
+            assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+        }
+    }
+
+    @Nested
+    class UpdateAssetTransaction {
+
+        @Test
+        public void whenAssetExists() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1"))
+                    .thenReturn("{ \"assetID\": \"asset1\", \"color\": \"blue\", \"size\": 45, \"owner\": \"Arturo\", \"appraisedValue\": 60 }");
+
+            Asset asset = contract.UpdateAsset(ctx, "asset1", "pink", 45, "Arturo", 600);
+
+            assertThat(asset).isEqualTo(new Asset("asset1", "pink", 45, "Arturo", 600));
+        }
+
+        @Test
+        public void whenAssetDoesNotExist() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1")).thenReturn("");
+
+            Throwable thrown = catchThrowable(() -> {
+                contract.TransferAsset(ctx, "asset1", "Alex");
+            });
+
+            assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+                    .hasMessage("Asset asset1 does not exist");
+            assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+        }
+    }
+
+    @Nested
+    class DeleteAssetTransaction {
+
+        @Test
+        public void whenAssetDoesNotExist() {
+            AssetTransfer contract = new AssetTransfer();
+            Context ctx = mock(Context.class);
+            ChaincodeStub stub = mock(ChaincodeStub.class);
+            when(ctx.getStub()).thenReturn(stub);
+            when(stub.getStringState("asset1")).thenReturn("");
+
+            Throwable thrown = catchThrowable(() -> {
+                contract.DeleteAsset(ctx, "asset1");
+            });
+
+            assertThat(thrown).isInstanceOf(ChaincodeException.class).hasNoCause()
+                    .hasMessage("Asset asset1 does not exist");
+            assertThat(((ChaincodeException) thrown).getPayload()).isEqualTo("ASSET_NOT_FOUND".getBytes());
+        }
+    }
+}

asset-transfer-basic/chaincode-javascript/.eslintignore

@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+coverage