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Interact with "fabcar" Chaincode on CLI
How to Interact "fabcar" Chaincode on CLI?
✍: FYIcenter.com
After you started the WYFA network properly, you will have the "fabcar" chaincode running on "mychannel" on the peer0.org1.example.com peer container.
You can now interact with the "fabcar" chaincode from the CLI container as shown below.
1. Connect to CLI container:
$ docker exec -it cli bash root@262918fdcbc0:/opt/gopath/src/github.com/hyperledger/fabric/peer# cd root@262918fdcbc0:~#
2. Make sure that the "fabcar" chaincode is instantiated:
root@262918fdcbc0:~# peer chaincode list --instantiated -C mychannel Get instantiated chaincodes on channel mychannel: Name: fabcar, Version: 1.0, Path: github.com/fabcar/go, Escc: escc, Vscc: vscc
3. Try the query method on the chaincode:
root@262918fdcbc0:~# peer chaincode query -C mychannel -n fabcar -c '{"Args":[]}' Error: endorsement failure during query. response: status:500 message:"Invalid Smart Contract function name."
The error is expected, since the chaincode does not implement the "Query" method.
4. Try the invoke method on the chaincode:
root@262918fdcbc0:~# peer chaincode invoke -C mychannel -n fabcar -c '{"Args":[]}' [chaincodeCmd] InitCmdFactory -> INFO 001 Retrieved channel (mychannel) orderer endpoint: orderer.example.com:7050 Error: endorsement failure during invoke. response: status:500 message:"Invalid Smart Contract function name."
This error is also expected, since chaincode's Invoke method requires the function name to perform a pre-defined task.
5. Try the invoke method with initLedger function on the chaincode:
root@262918fdcbc0:~# peer chaincode invoke -C mychannel -n fabcar -c '{"function":"initLedger","Args":[]}' [chaincodeCmd] InitCmdFactory -> INFO 001 Retrieved channel (mychannel) orderer endpoint: orderer.example.com:7050 [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 002 Chaincode invoke successful. result: status:200
The chaincode executed the initLedger and returned a successful code.
6. Try the invoke method with queryAllCars function on the chaincode:
root@262918fdcbc0:~# peer chaincode invoke -C mychannel -n fabcar -c '{"function":"queryAllCars","Args":[]}' [chaincodeCmd] InitCmdFactory -> INFO 001 Retrieved channel (mychannel) orderer endpoint: orderer.example.com:7050 [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 002 Chaincode invoke successful. result: status:200 \ payload:"[ {\"Key\":\"CAR0\", \"Record\":{\"colour\":\"blue\",\"make\":\"Toyota\",\"model\":\"Prius\",\"owner\":\"Tomoko\"}}, {\"Key\":\"CAR1\", \"Record\":{\"colour\":\"red\",\"make\":\"Ford\",\"model\":\"Mustang\",\"owner\":\"Brad\"}}, {\"Key\":\"CAR2\", \"Record\":{\"colour\":\"green\",\"make\":\"Hyundai\",\"model\":\"Tucson\",\"owner\":\"Jin Soo\"}}, ... ]"
The chaincode executed the queryAllCars and returned a payload message.
⇒ Verify World State in CouchDB
⇐ fabcar.go - The "fabcar" Chaincode
2020-02-20, 1676🔥, 0💬
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