Create issue.md

added instruction what i faced while setting up foirst network


Signed-off-by: Dhiran Kumar Yadav <97027545+dhiran-gen@users.noreply.github.com>

learn/day1/issue.md

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+# Hyperledger Fabric Test Network Setup
+
+## Prerequisites
+Ensure you have the following installed before proceeding:
+- **Docker** (Latest stable version)
+- **Docker Compose**
+- **Go** (>=1.20)
+- **Node.js & NPM** (For chaincode development, optional)
+- **jq, wget, curl**
+- **Hyperledger Fabric binaries and samples**
+
+---
+
+## 1️⃣ Download Hyperledger Fabric Binaries & Samples
+If you faced issues with missing peer binaries, ensure you download them correctly:
+
+```bash
+curl -sSL https://bit.ly/2ysbOFE | bash -s -- 2.5.0
+```
+This will download the **Fabric binaries**, **Docker images**, and **samples** for version `2.5.0`.
+
+If you need a different version, replace `2.5.0` with the desired version.
+
+---
+
+## 2️⃣ Export Environment Variables
+After downloading, set the environment variables to ensure Fabric binaries are accessible:
+
+```bash
+export PATH=$PATH:$HOME/go/fabric-samples/bin
+export FABRIC_CFG_PATH=$HOME/go/fabric-samples/config
+```
+
+To make these exports permanent, add them to your **~/.bashrc** or **~/.zshrc** file:
+```bash
+echo 'export PATH=$PATH:$HOME/go/fabric-samples/bin' >> ~/.zshrc
+echo 'export FABRIC_CFG_PATH=$HOME/go/fabric-samples/config' >> ~/.zshrc
+source ~/.zshrc
+```
+
+---
+
+## 3️⃣ Start the Fabric Network
+Navigate to the **test-network** directory:
+```bash
+cd ~/go/fabric-samples/test-network
+```
+Then start the network with:
+```bash
+./network.sh down
+./network.sh up createChannel -ca
+```
+This will:
+- Bring up the Fabric network (Orderer + Peers)
+- Create a channel (`mychannel`)
+- Use Certificate Authorities (CAs) for identity management
+
+---
+
+## 4️⃣ Deploy Chaincode
+To deploy the **basic** chaincode:
+```bash
+./network.sh deployCC -ccn basic -ccp ../asset-transfer-basic/chaincode-go -ccl go
+```
+
+Verify the deployment:
+```bash
+peer chaincode query -C mychannel -n basic -c '{"Args":["GetAllAssets"]}'
+```
+
+---
+
+## 5️⃣ Set Organization Environment Variables
+To interact with the network as **Org1**, export these variables:
+```bash
+export CORE_PEER_TLS_ENABLED=true
+export CORE_PEER_LOCALMSPID="Org1MSP"
+export CORE_PEER_TLS_ROOTCERT_FILE=${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
+export CORE_PEER_MSPCONFIGPATH=${PWD}/organizations/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
+export CORE_PEER_ADDRESS=localhost:7051
+```
+For **Org2**, use:
+```bash
+export CORE_PEER_LOCALMSPID="Org2MSP"
+export CORE_PEER_TLS_ROOTCERT_FILE=${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt
+export CORE_PEER_MSPCONFIGPATH=${PWD}/organizations/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
+export CORE_PEER_ADDRESS=localhost:9051
+```
+
+---
+
+## 6️⃣ Invoke Chaincode
+To **initialize the ledger**:
+```bash
+peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile ${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C mychannel -n basic -c '{"Args":["InitLedger"]}'
+```
+⚠️ **Note:** Do NOT use `--isInit` as the new Fabric chaincode model doesn't require it.
+
+To **query the ledger**:
+```bash
+peer chaincode query -C mychannel -n basic -c '{"Args":["GetAllAssets"]}'
+```
+
+---
+
+## 7️⃣ Shutdown the Network
+To stop and clean up everything:
+```bash
+./network.sh down
+```
+
+This will:
+- Remove all containers
+- Delete crypto materials and channel artifacts
+
+---
+
+## Troubleshooting
+
+### 🛑 `peer: command not found`
+- Ensure the Fabric binaries are added to `PATH`.
+- Run: `export PATH=$PATH:$HOME/go/fabric-samples/bin`
+
+### 🛑 `Config File "core" Not Found`
+- Ensure `FABRIC_CFG_PATH` is set correctly.
+- Run: `export FABRIC_CFG_PATH=$HOME/go/fabric-samples/config`
+
+### 🛑 `Cannot run peer because cannot init crypto`
+- The MSP path is incorrect or missing.
+- Verify it exists: `ls -l $FABRIC_CFG_PATH/msp`
+- Try regenerating the MSP: `./network.sh down && ./network.sh up createChannel -ca`
+
+---
+
+This README provides a clear step-by-step guide to setting up and troubleshooting your Hyperledger Fabric network. 🚀
+