How to assign identity to fabric-client instance? - hyperledger-fabric

Question

I am unable to install node chaincode using fabric-node-sdk.
I am getting the following error:
installChaincode error No identity has been assigned to this client
I am using following script
const Client = require("fabric-client");
const path = require("path");
const os = require("os");
const client = new Client();
const deploy = async () => {
const connectionOpts = {
name: "peer1",
"request-timeout": 7000,
pem: path.resolve(
os.homedir,
"/fabric-samples/chaincode-docker-devmode/msp/signcerts/peer.pem"
),
"ssl-target-name-override": "peer"
};
const peer = client.newPeer("grpc://172.18.0.3:7052", connectionOpts);
const request = {
targets: peer,
chaincodePath: path.resolve(
os.homedir + "/fabric-samples/chaincode/chaincode_example02/node"
),
chaincodeId: "myc",
chaincodeVersion: "v0",
chaincodeType: "node"
};
const result = await client.installChaincode(request, 6000);
console.log(await result);
};
deploy();
How do I assign identity to client?
In the documentation, it is not demonstrated what arguments it required and how to assign identity.

Answer 1

Peer node want to know who is making the transaction. Try using this method before the install chincode transaction:
client.setAdminSigningIdentity(private_key, certificate, mspid)
Where:
private_key: the private key PEM string
certificate: the PEM-encoded string of certificate
mspid: The Member Service Provider id for the local signing identity (i.e 'Org1MSP')
In the chaincode install request, you need the txId:
client.setAdminSigningIdentity(private_key, certificate, mspid)
const request = {
targets: peer,
chaincodePath: path.resolve(
os.homedir + "/fabric-samples/chaincode/chaincode_example02/node"
),
chaincodeId: "myc",
chaincodeVersion: "v0",
chaincodeType: "node",
txId: client.newTransactionID(true)
};
const result = await client.installChaincode(request, 6000);
console.log(await result);

Answer 2

I faced the same issue as well and it is resolved after adding the below line, i.e., channel initialization.
await channel.initialize({ discover: true });
source: https://fabric-sdk-node.github.io/master/tutorial-discovery.html