未能调用链代码名称：“lscc”，错误：事务返回失败：调用了未定义的合约方法

Question

我正在尝试从 fabric-samples 安装 facar 的 java 链代码，但出现错误。https://github.com/hyperledger/fabric-samples/tree/release-1.4/chaincode/fabcar/java在链码上方，我正在尝试并在链码实例化期间出现错误有人可以帮助我吗，非常感谢并提前致谢。我正在使用基本网络文件夹和下面的脚本来创建和安装网络，实例化和调用链代码。#!/bin/bash## Copyright IBM Corp All Rights Reserved## SPDX-License-Identifier: Apache-2.0## Exit on first error, print all commands.set -ev# don't rewrite paths for Windows Git Bash usersexport MSYS_NO_PATHCONV=1docker-compose -f docker-compose.yml downdocker-compose -f docker-compose.yml up -d ca.example.com orderer.example.com peer0.org1.example.com couchdbdocker ps -a# wait for Hyperledger Fabric to start# incase of errors when running later commands, issue export FABRIC_START_TIMEOUT=<larger number>export FABRIC_START_TIMEOUT=10#echo ${FABRIC_START_TIMEOUT}sleep ${FABRIC_START_TIMEOUT}# Create the channeldocker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/users/[e-mail]/msp" peer0.org1.example.com peer channel create -o orderer.example.com:7050 -c mychannel -f /etc/hyperledger/configtx/channel.tx# Join peer0.org1.example.com to the channel.docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/users/[e-mail]/msp" peer0.org1.example.com peer channel join -b mychannel.blockdocker-compose -f docker-compose.yml up -d clisleep 5

Answer 1

也许你忘记了@Default装饰器

@Contract(name = "MyContract",

        info = @Info(

                title = "My Contract",

                description = "",

                version = "0.0.1"

        )

)

@Default

public class MyContract implements ContractInterface {

Answer 2

调用了未定义的合约方法

在代码的前几行。这意味着您传递给调用的函数不存在于链码中，您可以检查链码并查看 initLedger 是否存在？或者是否存在任何拼写错误。希望这是有用的。

Answer 3

如果您在实例化链码时遇到此问题，则可以使用您的自定义实现覆盖ContractInterface中给出的以下方法。

/**

 * Invoked for any transaction that does not exist.

 *

 * This will throw an exception. If you wish to alter the exception thrown or 

 * if you wish to consider requests for transactions that don't exist as not an

 * error, subclass this method.

 *

 * @param ctx the context as created by {@link #createContext(ChaincodeStub)}.

 */

default void unknownTransaction(Context ctx) {

    throw new ChaincodeException("Undefined contract method called");

}

否则，如果在调用现有事务时出现问题，则确保注释@Transaction() 存在于事务方法中。