我正在尝试在Hyperledger fabric版本1.2中编写一些简单的chaincode应用程序。但是，当我在fabric-samples / chaincode / fabcar中尝试Fabcar示例时，我无法查询任何汽车。这是我的查询命令：
docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/users/Admin@org1.example.com/msp" peer0.org1.example.com peer chaincode instantiate -o orderer.example.com:7050 -C mychannel -n mycc -l node -v 1.0 -c '{"Args":["Init"]}'
docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/users/Admin@org1.example.com/msp" peer0.org1.example.com peer chaincode query -C mychannel -n mycc -c '{"Args":["initLedger", "1"]}'
docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/e
tc/hyperledger/msp/users/Admin@org1.example.com/msp" peer0.org1.example.com peer chaincode query -C mychannel -n mycc -c '{"Args":["queryCar", "1"]}'
docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/users/Admin@org1.example.com/msp" peer0.org1.example.com peer chaincode query -C mychannel -n mycc -c '{"Args":["queryAllCars"]}'
这是有问题的链码：
/*
# Copyright IBM Corp. All Rights Reserved.
#
# SPDX-License-Identifier: Apache-2.0
*/
'use strict';
const shim = require('fabric-shim');
const util = require('util');
let Chaincode = class {
// The Init method is called when the Smart Contract 'fabcar' is instantiated by the blockchain network
// Best practice is to have any Ledger initialization in separate function -- see initLedger()
async Init(stub) {
console.info('=========== Instantiated fabcar chaincode ===========');
return shim.success();
}
// The Invoke method is called as a result of an application request to run the Smart Contract
// 'fabcar'. The calling application program has also specified the particular smart contract
// function to be called, with arguments
async Invoke(stub) {
let ret = stub.getFunctionAndParameters();
console.info(ret);
let method = this[ret.fcn];
if (!method) {
console.error('no function of name:' + ret.fcn + ' found');
throw new Error('Received unknown function ' + ret.fcn + ' invocation');
}
try {
let payload = await method(stub, ret.params);
return shim.success(payload);
} catch (err) {
console.log(err);
return shim.error(err);
}
}
async queryCar(stub, args) {
if (args.length != 1) {
throw new Error('Incorrect number of arguments. Expecting CarNumber ex: CAR01');
}
let carNumber = args[0];
let carAsBytes = await stub.getState(carNumber); //get the car from chaincode state
if (!carAsBytes || carAsBytes.toString().length <= 0) {
throw new Error(carNumber + ' does not exist: ');
}
console.log(carAsBytes.toString());
return carAsBytes;
}
async initLedger(stub, args) {
console.info('============= START : Initialize Ledger ===========');
let cars = [];
cars.push({
make: 'Toyota',
model: 'Prius',
color: 'blue',
owner: 'Tomoko'
});
cars.push({
make: 'Ford',
model: 'Mustang',
color: 'red',
owner: 'Brad'
});
cars.push({
make: 'Hyundai',
model: 'Tucson',
color: 'green',
owner: 'Jin Soo'
});
cars.push({
make: 'Volkswagen',
model: 'Passat',
color: 'yellow',
owner: 'Max'
});
cars.push({
make: 'Tesla',
model: 'S',
color: 'black',
owner: 'Adriana'
});
cars.push({
make: 'Peugeot',
model: '205',
color: 'purple',
owner: 'Michel'
});
cars.push({
make: 'Chery',
model: 'S22L',
color: 'white',
owner: 'Aarav'
});
cars.push({
make: 'Fiat',
model: 'Punto',
color: 'violet',
owner: 'Pari'
});
cars.push({
make: 'Tata',
model: 'Nano',
color: 'indigo',
owner: 'Valeria'
});
cars.push({
make: 'Holden',
model: 'Barina',
color: 'brown',
owner: 'Shotaro'
});
for (let i = 0; i < cars.length; i++) {
cars[i].docType = 'car';
await stub.putState('CAR' + i, Buffer.from(JSON.stringify(cars[i])));
console.info('Added <--> ', cars[i]);
}
console.info('============= END : Initialize Ledger ===========');
}
async createCar(stub, args) {
console.info('============= START : Create Car ===========');
if (args.length != 5) {
throw new Error('Incorrect number of arguments. Expecting 5');
}
var car = {
docType: 'car',
make: args[1],
model: args[2],
color: args[3],
owner: args[4]
};
await stub.putState(args[0], Buffer.from(JSON.stringify(car)));
console.info('============= END : Create Car ===========');
}
async queryAllCars(stub, args) {
let startKey = 'CAR0';
let endKey = 'CAR999';
let iterator = await stub.getStateByRange(startKey, endKey);
let allResults = [];
while (true) {
let res = await iterator.next();
if (res.value && res.value.value.toString()) {
let jsonRes = {};
console.log(res.value.value.toString('utf8'));
jsonRes.Key = res.value.key;
try {
jsonRes.Record = JSON.parse(res.value.value.toString('utf8'));
} catch (err) {
console.log(err);
jsonRes.Record = res.value.value.toString('utf8');
}
allResults.push(jsonRes);
}
if (res.done) {
console.log('end of data');
await iterator.close();
console.info(allResults);
return Buffer.from(JSON.stringify(allResults));
}
}
}
async changeCarOwner(stub, args) {
console.info('============= START : changeCarOwner ===========');
if (args.length != 2) {
throw new Error('Incorrect number of arguments. Expecting 2');
}
let carAsBytes = await stub.getState(args[0]);
let car = JSON.parse(carAsBytes);
car.owner = args[1];
await stub.putState(args[0], Buffer.from(JSON.stringify(car)));
console.info('============= END : changeCarOwner ===========');
}
};
shim.start(new Chaincode());
这是我输入
时的结果docker日志dev-peer0.org1.example.com-mycc-1.0
> fabcar@1.0.0 start /usr/local/src
> node fabcar.js "--peer.address" "peer0.org1.example.com:7052"
=========== Instantiated fabcar chaincode ===========
{ fcn: 'initLedger', params: [ '1' ] }
============= START : Initialize Ledger ===========
Added <--> { make: 'Toyota',
model: 'Prius',
color: 'blue',
owner: 'Tomoko',
docType: 'car' }
Added <--> { make: 'Ford',
model: 'Mustang',
color: 'red',
owner: 'Brad',
docType: 'car' }
Added <--> { make: 'Hyundai',
model: 'Tucson',
color: 'green',
owner: 'Jin Soo',
docType: 'car' }
Added <--> { make: 'Volkswagen',
model: 'Passat',
color: 'yellow',
owner: 'Max',
docType: 'car' }
Added <--> { make: 'Tesla',
model: 'S',
color: 'black',
owner: 'Adriana',
docType: 'car' }
Added <--> { make: 'Peugeot',
model: '205',
color: 'purple',
owner: 'Michel',
docType: 'car' }
Added <--> { make: 'Chery',
model: 'S22L',
color: 'white',
owner: 'Aarav',
docType: 'car' }
Added <--> { make: 'Fiat',
model: 'Punto',
color: 'violet',
owner: 'Pari',
docType: 'car' }
Added <--> { make: 'Tata',
model: 'Nano',
color: 'indigo',
owner: 'Valeria',
docType: 'car' }
Added <--> { make: 'Holden',
model: 'Barina',
color: 'brown',
owner: 'Shotaro',
docType: 'car' }
============= END : Initialize Ledger ===========
{ fcn: 'queryCar', params: [ 'CAR1' ] }
Error: CAR1 does not exist:
at queryCar (/usr/local/src/fabcar.js:49:13)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
2019-01-15T11:19:33.113Z ERROR [lib/handler.js] [mychannel-e871dea2]Calling chaincode Invoke() returned error response [Error: CAR1 does not exist: ]. Sending ERROR message back to peer
{ fcn: 'queryCar', params: [ '1' ] }
Error: 1 does not exist:
at queryCar (/usr/local/src/fabcar.js:49:13)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
2019-01-15T11:19:38.799Z ERROR [lib/handler.js] [mychannel-063f1069]Calling chaincode Invoke() returned error response [Error: 1 does not exist: ]. Sending ERROR message back to peer
{ fcn: 'queryAllCars', params: [] }
end of data
[]
我能够在Building first network中运行该示例，但是显然在该示例中，变量是在init函数中初始化的，而在本示例中则不是。
我正在使用基本网络来运行Hyperledger网络。
我是Fabric的新手，所以我只是想了解如何创建一个简单的chaincode应用程序，但是我不知道如何解决此错误。 请帮助我，非常感谢。
更新：这是CouchDB的日志：
[notice] 2019-01-15T11:22:16.089668Z nonode@nohost <0.674.0> 0269d8db8d couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/2?attachments=true 404 ok 0
[notice] 2019-01-15T11:22:19.270219Z nonode@nohost <0.674.0> 1668dfe5a3 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/2?attachments=true 404 ok 0
[notice] 2019-01-15T11:36:11.858609Z nonode@nohost <0.20709.0> d43f3ef0f8 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/1?attachments=true 404 ok 51
[notice] 2019-01-15T11:36:20.814603Z nonode@nohost <0.20709.0> 92a6fef801 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/1?attachments=true 404 ok 0
[notice] 2019-01-15T11:36:31.675132Z nonode@nohost <0.20709.0> 9d4f700668 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/2?attachments=true 404 ok 0
[notice] 2019-01-15T11:36:49.859017Z nonode@nohost <0.20709.0> 81625d8469 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/CAR2?attachments=true 404 ok 0
[notice] 2019-01-15T11:36:51.211387Z nonode@nohost <0.20709.0> fbd0612525 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/CAR2?attachments=true 404 ok 0
[notice] 2019-01-15T11:37:04.092872Z nonode@nohost <0.20709.0> 791cfa83a0 couchdb:5984 172.23.0.5 undefined GET /mychannel_mycc/_all_docs?attachments=true&endkey=%22CAR999%22&include_docs=true&inclusive_end=false&limit=1001&startkey=%22CAR0%22 200 ok 30
这是否意味着分类帐无法连接到CouchDB？这是我的docker-compose.yaml文件：
#
# Copyright IBM Corp All Rights Reserved
#
# SPDX-License-Identifier: Apache-2.0
#
version: '2'
networks:
basic:
services:
ca.example.com:
image: hyperledger/fabric-ca
environment:
- FABRIC_CA_HOME=/etc/hyperledger/fabric-ca-server
- FABRIC_CA_SERVER_CA_NAME=ca.example.com
- FABRIC_CA_SERVER_CA_CERTFILE=/etc/hyperledger/fabric-ca-server-config/ca.org1.example.com-cert.pem
- FABRIC_CA_SERVER_CA_KEYFILE=/etc/hyperledger/fabric-ca-server-config/2ef41cf85bf5f581c1bf943dc0231656f5b151c7e579649c96f69ed5d96b437c_sk
ports:
- "7054:7054"
command: sh -c 'fabric-ca-server start -b admin:adminpw'
volumes:
- ./crypto-config/peerOrganizations/org1.example.com/ca/:/etc/hyperledger/fabric-ca-server-config
container_name: ca.example.com
networks:
- basic
orderer.example.com:
container_name: orderer.example.com
image: hyperledger/fabric-orderer
environment:
- ORDERER_GENERAL_LOGLEVEL=info
- ORDERER_GENERAL_LISTENADDRESS=0.0.0.0
- ORDERER_GENERAL_GENESISMETHOD=file
- ORDERER_GENERAL_GENESISPROFILE=SampleDevModeSolo
- ORDERER_GENERAL_GENESISFILE=/etc/hyperledger/configtx/genesis.block
- ORDERER_GENERAL_LOCALMSPID=OrdererMSP
- ORDERER_GENERAL_LOCALMSPDIR=/etc/hyperledger/msp/orderer/msp
working_dir: /opt/gopath/src/github.com/hyperledger/fabric/orderer
command: orderer
ports:
- 7050:7050
volumes:
- ./config/:/etc/hyperledger/configtx
- ./crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/:/etc/hyperledger/msp/orderer
- ./crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/:/etc/hyperledger/msp/peerOrg1
networks:
- basic
peer0.org1.example.com:
container_name: peer0.org1.example.com
image: hyperledger/fabric-peer
environment:
- CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
- CORE_PEER_ID=peer0.org1.example.com
- CORE_LOGGING_PEER=debug
- CORE_CHAINCODE_LOGGING_LEVEL=debug
- CORE_PEER_LOCALMSPID=Org1MSP
- CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/peer/
- CORE_PEER_ADDRESS=peer0.org1.example.com:7051
# # the following setting starts chaincode containers on the same
# # bridge network as the peers
# # https://docs.docker.com/compose/networking/
- CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=${COMPOSE_PROJECT_NAME}_basic
- CORE_LEDGER_STATE_STATEDATABASE=CouchDB
- CORE_LEDGER_STATE_COUCHDBCONFIG_COUCHDBADDRESS=couchdb:5984
# The CORE_LEDGER_STATE_COUCHDBCONFIG_USERNAME and CORE_LEDGER_STATE_COUCHDBCONFIG_PASSWORD
# provide the credentials for ledger to connect to CouchDB. The username and password must
# match the username and password set for the associated CouchDB.
- CORE_LEDGER_STATE_COUCHDBCONFIG_USERNAME=
- CORE_LEDGER_STATE_COUCHDBCONFIG_PASSWORD=
working_dir: /opt/gopath/src/github.com/hyperledger/fabric
# command: peer node start
command: peer node start --peer-chaincodedev=true
ports:
- 7051:7051
- 7053:7053
volumes:
- /var/run/:/host/var/run/
- ./crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp:/etc/hyperledger/msp/peer
- ./crypto-config/peerOrganizations/org1.example.com/users:/etc/hyperledger/msp/users
- ./config:/etc/hyperledger/configtx
- ./fabcar:/opt/gopath/src/github.com/
depends_on:
- orderer.example.com
- couchdb
networks:
- basic
couchdb:
container_name: couchdb
image: hyperledger/fabric-couchdb
# Populate the COUCHDB_USER and COUCHDB_PASSWORD to set an admin user and password
# for CouchDB. This will prevent CouchDB from operating in an "Admin Party" mode.
environment:
- COUCHDB_USER=
- COUCHDB_PASSWORD=
ports:
- 5984:5984
networks:
- basic
cli:
container_name: cli
image: hyperledger/fabric-tools
tty: true
environment:
- GOPATH=/opt/gopath
- CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
- CORE_LOGGING_LEVEL=info
- CORE_PEER_ID=cli
- CORE_PEER_ADDRESS=peer0.org1.example.com:7051
- CORE_PEER_LOCALMSPID=Org1MSP
- CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
- CORE_CHAINCODE_KEEPALIVE=10
working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
command: /bin/bash
volumes:
- /var/run/:/host/var/run/
- ./../chaincode/:/opt/gopath/src/github.com/
- ./crypto-config:/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/
networks:
- basic
#depends_on:
# - orderer.example.com
# - peer0.org1.example.com
# - couchdb