mirror of
https://github.com/hyperledger/fabric-samples.git
synced 2026-06-17 15:35:09 +00:00
Merge b17085b69e into a2c40e6522
This commit is contained in:
Rohan Dev
GitHub
commit
3785d3245b
9 changed files with 529 additions and 1 deletions
|
|
@ -0,0 +1,56 @@
|
|||
#
|
||||
# SPDX-License-Identifier: Apache-2.0
|
||||
#
|
||||
#Stage 1 – Builder image
|
||||
FROM golang:1.23-alpine AS builder
|
||||
|
||||
RUN apk add --no-cache git
|
||||
|
||||
WORKDIR /build
|
||||
|
||||
|
||||
COPY go.mod go.sum ./
|
||||
RUN go mod download
|
||||
|
||||
COPY src/ ./src/
|
||||
RUN CGO_ENABLED=0 go build -v -o /build/chaincode ./src/...
|
||||
|
||||
|
||||
# Stage 2 – Chaincode-as-a-Service (CaaS) image
|
||||
FROM alpine:3.20 AS ccaas
|
||||
|
||||
ARG TARGETARCH
|
||||
ARG CC_SERVER_PORT=9999
|
||||
|
||||
# tini gives us proper PID-1 signal handling
|
||||
ENV TINI_VERSION=v0.19.0
|
||||
ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static-${TARGETARCH} /tini
|
||||
RUN chmod +x /tini
|
||||
|
||||
RUN addgroup -S chaincode && adduser -S chaincode -G chaincode
|
||||
WORKDIR /home/chaincode
|
||||
|
||||
COPY --from=builder /build/chaincode ./chaincode
|
||||
COPY docker/docker-entrypoint.sh ./docker-entrypoint.sh
|
||||
RUN chmod +x ./docker-entrypoint.sh
|
||||
|
||||
ENV PORT=${CC_SERVER_PORT}
|
||||
EXPOSE ${CC_SERVER_PORT}
|
||||
|
||||
USER chaincode
|
||||
ENTRYPOINT ["/tini", "--", "./docker-entrypoint.sh"]
|
||||
|
||||
|
||||
|
||||
# Stage 3 – k8s builder image
|
||||
FROM alpine:3.20 AS k8s
|
||||
|
||||
RUN addgroup -S chaincode && adduser -S chaincode -G chaincode
|
||||
WORKDIR /home/chaincode
|
||||
|
||||
COPY --from=builder /build/chaincode ./chaincode
|
||||
COPY docker/docker-entrypoint.sh ./docker-entrypoint.sh
|
||||
RUN chmod +x ./docker-entrypoint.sh
|
||||
|
||||
USER chaincode
|
||||
CMD ["./docker-entrypoint.sh"]
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
#
|
||||
# SPDX-License-Identifier: Apache-2.0
|
||||
#
|
||||
---
|
||||
smart_contract_name: "asset-transfer"
|
||||
smart_contract_version: "1.0.0"
|
||||
smart_contract_sequence: 1
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||||
smart_contract_package: "asset-transfer.tgz"
|
||||
# smart_contract_constructor: ""
|
||||
smart_contract_endorsement_policy: ""
|
||||
smart_contract_collections_file: ""
|
||||
|
|
@ -0,0 +1,30 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
set -euo pipefail
|
||||
|
||||
: "${CORE_PEER_TLS_ENABLED:=false}"
|
||||
|
||||
if [[ ! -v CHAINCODE_SERVER_ADDRESS ]]; then
|
||||
# Legacy peer-managed mode: binary acts as a regular chaincode process.
|
||||
exec ./chaincode --peer.address "${CORE_PEER_ADDRESS}"
|
||||
|
||||
elif [[ "${CORE_PEER_TLS_ENABLED,,}" == "true" ]]; then
|
||||
# CaaS + TLS: fabric-chaincode-go/v2 reads CHAINCODE_SERVER_ADDRESS,
|
||||
# CORE_CHAINCODE_ID_NAME, and TLS vars directly as env vars.
|
||||
exec env \
|
||||
CORE_CHAINCODE_ID_NAME="${CHAINCODE_ID}" \
|
||||
CHAINCODE_SERVER_ADDRESS="${CHAINCODE_SERVER_ADDRESS}" \
|
||||
CORE_PEER_TLS_ENABLED=true \
|
||||
CORE_PEER_TLS_ROOTCERT_FILE="${CHAINCODE_TLS_KEY:-/hyperledger/privatekey.pem}" \
|
||||
CORE_TLS_CLIENT_KEY_FILE="${CHAINCODE_TLS_CERT:-/hyperledger/cert.pem}" \
|
||||
CORE_TLS_CLIENT_CERT_FILE="${CHAINCODE_TLS_CLIENT_CACERT:-/hyperledger/rootcert.pem}" \
|
||||
./chaincode
|
||||
|
||||
else
|
||||
# CaaS without TLS: fabric-chaincode-go/v2 uses CHAINCODE_SERVER_ADDRESS
|
||||
# and CORE_CHAINCODE_ID_NAME env vars to start the gRPC server.
|
||||
exec env \
|
||||
CORE_CHAINCODE_ID_NAME="${CHAINCODE_ID}" \
|
||||
CHAINCODE_SERVER_ADDRESS="${CHAINCODE_SERVER_ADDRESS}" \
|
||||
./chaincode
|
||||
fi
|
||||
|
|
@ -0,0 +1,30 @@
|
|||
module asset
|
||||
|
||||
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
|
||||
google.golang.org/protobuf v1.36.1
|
||||
)
|
||||
|
||||
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 v0.28.0 // indirect
|
||||
golang.org/x/sys v0.24.0 // indirect
|
||||
golang.org/x/text v0.17.0 // indirect
|
||||
google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
|
||||
google.golang.org/grpc v1.67.0 // indirect
|
||||
gopkg.in/yaml.v3 v3.0.1 // indirect
|
||||
)
|
||||
|
|
@ -0,0 +1,61 @@
|
|||
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
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-openapi/jsonpointer v0.21.0 h1:YgdVicSA9vH5RiHs9TZW5oyafXZFc6+2Vc1rr/O9oNQ=
|
||||
github.com/go-openapi/jsonpointer v0.21.0/go.mod h1:IUyH9l/+uyhIYQ/PXVA41Rexl+kOkAPDdXEYns6fzUY=
|
||||
github.com/go-openapi/jsonreference v0.21.0 h1:Rs+Y7hSXT83Jacb7kFyjn4ijOuVGSvOdF2+tg1TRrwQ=
|
||||
github.com/go-openapi/jsonreference v0.21.0/go.mod h1:LmZmgsrTkVg9LG4EaHeY8cBDslNPMo06cago5JNLkm4=
|
||||
github.com/go-openapi/spec v0.21.0 h1:LTVzPc3p/RzRnkQqLRndbAzjY0d0BCL72A6j3CdL9ZY=
|
||||
github.com/go-openapi/spec v0.21.0/go.mod h1:78u6VdPw81XU44qEWGhtr982gJ5BWg2c0I5XwVMotYk=
|
||||
github.com/go-openapi/swag v0.23.0 h1:vsEVJDUo2hPJ2tu0/Xc+4noaxyEffXNIs3cOULZ+GrE=
|
||||
github.com/go-openapi/swag v0.23.0/go.mod h1:esZ8ITTYEsH1V2trKHjAN8Ai7xHb8RV+YSZ577vPjgQ=
|
||||
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
|
||||
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
|
||||
github.com/hyperledger/fabric-chaincode-go/v2 v2.0.0 h1:IhkHfrl5X/fVnmB6pWeCYCdIJRi9bxj+WTnVN8DtW3c=
|
||||
github.com/hyperledger/fabric-chaincode-go/v2 v2.0.0/go.mod h1:PHHaFffjw7p7n9bmCfcm7RqDqYdivNEsJdiNIKZo5Lk=
|
||||
github.com/hyperledger/fabric-contract-api-go/v2 v2.2.0 h1:rmUoBmciB0GL/miqcbJmJbgp5QTWoJUrZo+CNxrNLF4=
|
||||
github.com/hyperledger/fabric-contract-api-go/v2 v2.2.0/go.mod h1:FeWeO/jwGjiME7ak3GufqKIcwkejtzrDG4QxbfKydWs=
|
||||
github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4 h1:YJrd+gMaeY0/vsN0aS0QkEKTivGoUnSRIXxGJ7KI+Pc=
|
||||
github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4/go.mod h1:bau/6AJhvEcu9GKKYHlDXAxXKzYNfhP6xu2GXuxEcFk=
|
||||
github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
|
||||
github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
|
||||
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
|
||||
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
|
||||
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
|
||||
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
|
||||
github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
|
||||
github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
|
||||
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
|
||||
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
|
||||
github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
|
||||
github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
|
||||
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
|
||||
github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
|
||||
github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
|
||||
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
|
||||
github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
|
||||
github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
|
||||
github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
|
||||
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb h1:zGWFAtiMcyryUHoUjUJX0/lt1H2+i2Ka2n+D3DImSNo=
|
||||
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
|
||||
github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 h1:EzJWgHovont7NscjpAxXsDA8S8BMYve8Y5+7cuRE7R0=
|
||||
github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
|
||||
github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17UxZ74=
|
||||
github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
|
||||
golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE=
|
||||
golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
|
||||
golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
|
||||
golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
|
||||
golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
|
||||
golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
|
||||
google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 h1:e7S5W7MGGLaSu8j3YjdezkZ+m1/Nm0uRVRMEMGk26Xs=
|
||||
google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
|
||||
google.golang.org/grpc v1.67.0 h1:IdH9y6PF5MPSdAntIcpjQ+tXO41pcQsfZV2RxtQgVcw=
|
||||
google.golang.org/grpc v1.67.0/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
|
||||
google.golang.org/protobuf v1.36.1 h1:yBPeRvTftaleIgM3PZ/WBIZ7XM/eEYAaEyCwvyjq/gk=
|
||||
google.golang.org/protobuf v1.36.1/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=
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
package main
|
||||
|
||||
type OwnerIdentifier struct {
|
||||
Org string `json:"org"`
|
||||
User string `json:"user"`
|
||||
}
|
||||
|
||||
type Asset struct {
|
||||
AppraisedValue int `json:"AppraisedValue"`
|
||||
Color string `json:"Color"`
|
||||
ID string `json:"ID"`
|
||||
Owner string `json:"Owner"` // JSON-encoded OwnerIdentifier
|
||||
Size int `json:"Size"`
|
||||
}
|
||||
|
|
@ -0,0 +1,307 @@
|
|||
/*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*/
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"log"
|
||||
|
||||
"github.com/hyperledger/fabric-chaincode-go/v2/pkg/cid"
|
||||
"github.com/hyperledger/fabric-chaincode-go/v2/pkg/statebased"
|
||||
"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
|
||||
)
|
||||
|
||||
// SmartContract provides functions for managing assets.
|
||||
type SmartContract struct {
|
||||
contractapi.Contract
|
||||
}
|
||||
|
||||
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)
|
||||
}
|
||||
|
||||
ownerID, err := clientIdentifier(ctx, owner)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
ownerJSON, err := json.Marshal(ownerID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
asset := Asset{
|
||||
AppraisedValue: appraisedValue,
|
||||
Color: color,
|
||||
ID: id,
|
||||
Owner: string(ownerJSON),
|
||||
Size: size,
|
||||
}
|
||||
assetBytes, err := json.Marshal(asset)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := ctx.GetStub().PutState(id, assetBytes); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
mspID, err := cid.GetMSPID(ctx.GetStub())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if err := setEndorsingOrgs(ctx, id, mspID); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return ctx.GetStub().SetEvent("CreateAsset", assetBytes)
|
||||
}
|
||||
|
||||
func (s *SmartContract) ReadAsset(ctx contractapi.TransactionContextInterface, id string) (*Asset, error) {
|
||||
assetBytes, err := readAsset(ctx, id)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var asset Asset
|
||||
if err := json.Unmarshal(assetBytes, &asset); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &asset, nil
|
||||
}
|
||||
|
||||
// UpdateAsset updates color, size, and appraised value of an existing asset.
|
||||
// The asset owner cannot be changed here; use TransferAsset instead.
|
||||
func (s *SmartContract) UpdateAsset(ctx contractapi.TransactionContextInterface, id string, color string, size int, appraisedValue int) error {
|
||||
assetBytes, err := readAsset(ctx, id)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
var existing Asset
|
||||
if err := json.Unmarshal(assetBytes, &existing); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ok, err := hasWritePermission(ctx, &existing)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !ok {
|
||||
return fmt.Errorf("Only owner can update assets")
|
||||
}
|
||||
|
||||
// Owner is intentionally preserved; use TransferAsset to change owner.
|
||||
existing.Color = color
|
||||
existing.Size = size
|
||||
existing.AppraisedValue = appraisedValue
|
||||
|
||||
updatedBytes, err := json.Marshal(existing)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := ctx.GetStub().PutState(id, updatedBytes); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
mspID, err := cid.GetMSPID(ctx.GetStub())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if err := setEndorsingOrgs(ctx, id, mspID); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return ctx.GetStub().SetEvent("UpdateAsset", updatedBytes)
|
||||
}
|
||||
|
||||
// DeleteAsset deletes an asset from the world state.
|
||||
func (s *SmartContract) DeleteAsset(ctx contractapi.TransactionContextInterface, id string) error {
|
||||
assetBytes, err := readAsset(ctx, id)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
var asset Asset
|
||||
if err := json.Unmarshal(assetBytes, &asset); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ok, err := hasWritePermission(ctx, &asset)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !ok {
|
||||
return fmt.Errorf("Only owner can delete assets")
|
||||
}
|
||||
|
||||
if err := ctx.GetStub().DelState(id); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return ctx.GetStub().SetEvent("DeleteAsset", assetBytes)
|
||||
}
|
||||
|
||||
// AssetExists returns true when an asset with the given ID exists in the world state.
|
||||
func (s *SmartContract) AssetExists(ctx contractapi.TransactionContextInterface, id string) (bool, error) {
|
||||
assetBytes, err := ctx.GetStub().GetState(id)
|
||||
if err != nil {
|
||||
return false, fmt.Errorf("failed to read from world state: %v", err)
|
||||
}
|
||||
|
||||
return assetBytes != nil, nil
|
||||
}
|
||||
|
||||
// TransferAsset updates the owner of an asset with the given ID.
|
||||
// newOwner is the user identifier; newOwnerOrg is the MSP ID of the new owning organisation.
|
||||
// Subsequent updates must be endorsed by the new owning organisation.
|
||||
func (s *SmartContract) TransferAsset(ctx contractapi.TransactionContextInterface, id string, newOwner string, newOwnerOrg string) error {
|
||||
assetBytes, err := readAsset(ctx, id)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
var asset Asset
|
||||
if err := json.Unmarshal(assetBytes, &asset); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ok, err := hasWritePermission(ctx, &asset)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !ok {
|
||||
return fmt.Errorf("Only owner can transfer assets")
|
||||
}
|
||||
|
||||
newOwnerID := OwnerIdentifier{Org: newOwnerOrg, User: newOwner}
|
||||
ownerJSON, err := json.Marshal(newOwnerID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
asset.Owner = string(ownerJSON)
|
||||
|
||||
updatedBytes, err := json.Marshal(asset)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := ctx.GetStub().PutState(id, updatedBytes); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := setEndorsingOrgs(ctx, id, newOwnerOrg); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return ctx.GetStub().SetEvent("TransferAsset", updatedBytes)
|
||||
}
|
||||
|
||||
// GetAllAssets returns all assets found in the world state.
|
||||
func (s *SmartContract) GetAllAssets(ctx contractapi.TransactionContextInterface) ([]*Asset, error) {
|
||||
// Range query with empty start/end key returns 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
|
||||
if err := json.Unmarshal(queryResponse.Value, &asset); err != nil {
|
||||
log.Printf("skipping malformed asset entry: %v", err)
|
||||
continue
|
||||
}
|
||||
assets = append(assets, &asset)
|
||||
}
|
||||
|
||||
return assets, nil
|
||||
}
|
||||
|
||||
// --- internal helpers -----------------------
|
||||
|
||||
func readAsset(ctx contractapi.TransactionContextInterface, id string) ([]byte, error) {
|
||||
assetBytes, err := ctx.GetStub().GetState(id)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to read from world state: %v", err)
|
||||
}
|
||||
if assetBytes == nil {
|
||||
return nil, fmt.Errorf("Sorry, asset %s has not been created", id)
|
||||
}
|
||||
|
||||
return assetBytes, nil
|
||||
}
|
||||
|
||||
func hasWritePermission(ctx contractapi.TransactionContextInterface, asset *Asset) (bool, error) {
|
||||
clientID, err := clientIdentifier(ctx, "")
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
|
||||
var ownerID OwnerIdentifier
|
||||
if err := json.Unmarshal([]byte(asset.Owner), &ownerID); err != nil {
|
||||
return false, fmt.Errorf("failed to parse asset owner: %v", err)
|
||||
}
|
||||
|
||||
return clientID.Org == ownerID.Org, nil
|
||||
}
|
||||
|
||||
func clientIdentifier(ctx contractapi.TransactionContextInterface, user string) (OwnerIdentifier, error) {
|
||||
mspID, err := cid.GetMSPID(ctx.GetStub())
|
||||
if err != nil {
|
||||
return OwnerIdentifier{}, err
|
||||
}
|
||||
|
||||
if user == "" {
|
||||
cn, err := clientCommonName(ctx)
|
||||
if err != nil {
|
||||
return OwnerIdentifier{}, err
|
||||
}
|
||||
user = cn
|
||||
}
|
||||
|
||||
return OwnerIdentifier{Org: mspID, User: user}, nil
|
||||
}
|
||||
|
||||
func clientCommonName(ctx contractapi.TransactionContextInterface) (string, error) {
|
||||
cert, err := cid.GetX509Certificate(ctx.GetStub())
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if cert.Subject.CommonName == "" {
|
||||
return "", fmt.Errorf("unable to identify client identity common name")
|
||||
}
|
||||
|
||||
return cert.Subject.CommonName, nil
|
||||
}
|
||||
|
||||
func setEndorsingOrgs(ctx contractapi.TransactionContextInterface, key string, orgs ...string) error {
|
||||
ep, err := statebased.NewStateEP(nil)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if err := ep.AddOrgs(statebased.RoleTypeMember, orgs...); err != nil {
|
||||
return err
|
||||
}
|
||||
policy, err := ep.Policy()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return ctx.GetStub().SetStateValidationParameter(key, policy)
|
||||
}
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
|
||||
"github.com/hyperledger/fabric-contract-api-go/v2/contractapi"
|
||||
)
|
||||
|
||||
func main() {
|
||||
assetChaincode, err := contractapi.NewChaincode(&SmartContract{})
|
||||
if err != nil {
|
||||
log.Panicf("Error creating asset-transfer chaincode: %v", err)
|
||||
}
|
||||
|
||||
if err := assetChaincode.Start(); err != nil {
|
||||
log.Panicf("Error starting asset-transfer chaincode: %v", err)
|
||||
}
|
||||
}
|
||||
|
|
@ -57,6 +57,7 @@
|
|||
"@types/node": "^20.19.33",
|
||||
"eslint": "^10.0.2",
|
||||
"typescript": "~5.8",
|
||||
"typescript-eslint": "^8.56.1"
|
||||
"typescript-eslint": "^8.56.1",
|
||||
"vitest": "^4.0.18"
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue