SyntaxError: неожиданный конец ввода JSON при попытке запросить сведения о транзакции из гиперреестра 2.2

Я пытаюсь запустить пример вознаграждения на .hyperledger 2.2. Контракт успешно упакован и развернут. Я также смог успешно запустить приложение и зарегистрировать администратора и пользователя.

Чейнкод успешно развернут:

Committed chaincode definition for chaincode 'customerloyalty' on channel 'mychannel':
Version: 1.0, Sequence: 1, Endorsement Plugin: escc, Validation Plugin: vscc, Approvals: [Org1MSP: true, Org2MSP: true]
Query chaincode definition successful on peer0.org2 on channel 'mychannel'

Зарегистрировать администратора успешно:

 
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
Successfully enrolled admin user "admin" and imported it into the wallet

удалось успешно зарегистрировать пользователя:

app running on port: 8000
Using param - firstname: Test lastname: User email: [email protected] phonenumber: 111-111-1111 accountNumber: 123456 cardId: 123
Valid Entries
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
Successfully registered and enrolled admin user 123 and imported it into the wallet
admin user admin disconnected

Submit Create Member transaction.
createMemberResponse: 
{
  accountNumber: '123456',
  firstName: 'Test',
  lastName: 'User',
  email: '[email protected]',
  phoneNumber: '111-111-1111',
  points: 0
}

Get member state 
memberResponse.parse_response: 
{
  accountNumber: '123456',
  firstName: 'Test',
  lastName: 'User',
  email: '[email protected]',
  phoneNumber: '111-111-1111',
  points: 0
}
memberData using param -  accountNumber: 123456 cardId: 123
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet

Get member state 
{
  accountNumber: '123456',
  firstName: 'Test',
  lastName: 'User',
  email: '[email protected]',
  phoneNumber: '111-111-1111',
  points: 0
}
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet

Однако, когда я пытаюсь получить информацию о транзакции в приложении, я получаю следующую ошибку без ответа от одноранговых узлов:

Get use points transactions state for member 123456
2023-01-05T21:28:46.042Z - error: [Transaction]: Error: No valid responses from any peers. Errors:
    peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
    at getResponsePayload (/../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
    at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.usePointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:592:41)
Error: No valid responses from any peers. Errors:
    peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
    at getResponsePayload (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
    at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.usePointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:592:41) {
  responses: [
    {
      version: 0,
      timestamp: null,
      response: [Object],
      payload: <Buffer >,
      endorsement: null,
      connection: [Object],
      peer: 'peer0.org1.example.com:7051'
    },
    {
      version: 0,
      timestamp: null,
      response: [Object],
      payload: <Buffer >,
      endorsement: null,
      connection: [Object],
      peer: 'peer0.org2.example.com:9051'
    }
  ],
  errors: []
}
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet

Get earn points transactions state for member 123456
2023-01-05T21:28:46.192Z - error: [Transaction]: Error: No valid responses from any peers. Errors:
    peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
    at getResponsePayload (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
    at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.earnPointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:545:25)
Error: No valid responses from any peers. Errors:
    peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
    at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
    at getResponsePayload (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
    at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Object.earnPointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:545:25) {
  responses: [
    {
      version: 0,
      timestamp: null,
      response: [Object],
      payload: <Buffer >,
      endorsement: null,
      connection: [Object],
      peer: 'peer0.org1.example.com:7051'
    },
    {
      version: 0,
      timestamp: null,
      response: [Object],
      payload: <Buffer >,
      endorsement: null,
      connection: [Object],
      peer: 'peer0.org2.example.com:9051'
    }
  ],
  errors: []
}
node:internal/errors:484
    ErrorCaptureStackTrace(err);
    ^

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
    at new NodeError (node:internal/errors:393:5)
    at ServerResponse.setHeader (node:_http_outgoing:644:11)
    at ServerResponse.header (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/express/lib/response.js:794:10)
    at ServerResponse.send (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/express/lib/response.js:174:12)
    at ServerResponse.json (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/express/lib/response.js:278:15)
    at ../fabric-samples/asset-transfer-basic/application-customerloyalty/app.js:278:37
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
  code: 'ERR_HTTP_HEADERS_SENT'
}

приведенный выше журнал указывает, что синтаксис json неверен в файле network.js, который вызывает функцию submitTransaction. выдержка из файла Network.js:

  /*
  * Get all EarnPoints transactions data
  * @param {String} cardId Card id to connect to network
  */
    earnPointsTransactionsInfo: async function (cardId, userType, userId) {

        // Create a new file system based wallet for managing identities.
        const walletPath = path.join(process.cwd(), '/wallet');
        const wallet = await Wallets.newFileSystemWallet(walletPath);
        console.info(`Wallet path: ${walletPath}`);

        try {
            // Create a new gateway for connecting to our peer node.
            const gateway2 = new Gateway();
            await gateway2.connect(ccp, { wallet, identity: cardId, discovery: gatewayDiscovery });

            // Get the network (channel) our contract is deployed to.
            const network = await gateway2.getNetwork('mychannel');

            // Get the contract from the network.
            const contract = network.getContract('customerloyalty');

            console.info(`\nGet earn points transactions state for ${userType} ${userId}`);
            //for debug only
            console.info(await contract.submitTransaction('EarnPointsTransactionsInfo', 'userType', 'userId'));
            //
            let earnPointsTransactions = await contract.submitTransaction('EarnPointsTransactionsInfo', userType, userId);
            //for debug only
            console.info(await contract.submitTransaction('EarnPointsTransactionsInfo', userType, userId));
            //
            earnPointsTransactions = JSON.parse(earnPointsTransactions.toString());
            console.info(earnPointsTransactions);

            // Disconnect from the gateway.
            await gateway2.disconnect();

            return earnPointsTransactions;
        }
        catch(err) {
            //print and return error
            console.info(err);
            let error = {};
            error.error = err.message;
            return error;
        }

    },

    usePointsTransactionsInfo: async function (cardId, userType, userId) {

        // Create a new file system based wallet for managing identities.
        const walletPath = path.join(process.cwd(), '/wallet');
        const wallet = await Wallets.newFileSystemWallet(walletPath);
        console.info(`Wallet path: ${walletPath}`);

        try {
            // Create a new gateway for connecting to our peer node.
            const gateway2 = new Gateway();
            await gateway2.connect(ccp, { wallet, identity: cardId, discovery: gatewayDiscovery });

            // Get the network (channel) our contract is deployed to.
            const network = await gateway2.getNetwork('mychannel');

            // Get the contract from the network.
            const contract = network.getContract('customerloyalty');

            console.info(`\nGet use points transactions state for ${userType} ${userId}`);
            let usePointsTransactions = await contract.submitTransaction('UsePointsTransactionsInfo',userType, userId);
            usePointsTransactions = JSON.parse(usePointsTransactions.toString());
            console.info(usePointsTransactions);

            // Disconnect from the gateway.
            await gateway2.disconnect();

            return usePointsTransactions;
        }

Я попытался проверить журналы от однорангового узла, используя журналы докеров <имя контейнера>:

2023-01-05 22:28:46 2023-01-05T21:28:46.023Z error [c-api:contracts-spi/chaincodefromcontract.js]     [mychannel-fedc897c] SyntaxError: Unexpected end of JSON input  
2023-01-05 22:28:46 2023-01-05T21:28:46.033Z error [c-api:lib/handler.js]                             [mychannel-fedc897c] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:28:46     at JSON.parse (<anonymous>)
2023-01-05 22:28:46     at CustomerLoyalty.UsePointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:110:29)
2023-01-05 22:28:46     at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:28:46     at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:28:46     at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer  
2023-01-05 22:28:46 2023-01-05T21:28:46.181Z error [c-api:contracts-spi/chaincodefromcontract.js]     [mychannel-644303c3] SyntaxError: Unexpected end of JSON input  
2023-01-05 22:28:46 2023-01-05T21:28:46.184Z error [c-api:lib/handler.js]                             [mychannel-644303c3] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:28:46     at JSON.parse (<anonymous>)
2023-01-05 22:28:46     at CustomerLoyalty.EarnPointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:89:29)
2023-01-05 22:28:46     at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:28:46     at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:28:46     at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer  
2023-01-05 22:32:51 2023-01-05T21:32:51.616Z info [c-api:lib/handler.js]                              [mychannel-68bdfcd2] Calling chaincode Invoke() succeeded. Sending COMPLETED message back to peer  
2023-01-05 22:32:53 2023-01-05T21:32:53.977Z error [c-api:contracts-spi/chaincodefromcontract.js]     [mychannel-7f185a49] SyntaxError: Unexpected end of JSON input  
2023-01-05 22:32:53 2023-01-05T21:32:53.989Z error [c-api:lib/handler.js]                             [mychannel-7f185a49] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:32:53     at JSON.parse (<anonymous>)
2023-01-05 22:32:53     at CustomerLoyalty.UsePointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:110:29)
2023-01-05 22:32:53     at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:32:53     at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:32:53     at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer  
2023-01-05 22:32:54 2023-01-05T21:32:54.195Z error [c-api:contracts-spi/chaincodefromcontract.js]     [mychannel-44d04ba9] SyntaxError: Unexpected end of JSON input  
2023-01-05 22:32:54 2023-01-05T21:32:54.197Z error [c-api:lib/handler.js]                             [mychannel-44d04ba9] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:32:54     at JSON.parse (<anonymous>)
2023-01-05 22:32:54     at CustomerLoyalty.EarnPointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:89:29)
2023-01-05 22:32:54     at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:32:54     at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:32:54     at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer  

Вот скрипт смарт-контракта customerloyalty.js:

'use strict';

const { Contract } = require('fabric-contract-api'); const allPartnersKey = 'all-partners'; const earnPointsTransactionsKey = 'earn-points-transactions'; const usePointsTransactionsKey = 'use-points-transactions';

class CustomerLoyalty extends Contract {
// Init function executed when the ledger is instantiated
async instantiate(ctx) {
    console.info('============= START : Initialize Ledger ===========');

    await ctx.stub.putState('instantiate', Buffer.from('INIT-LEDGER'));
    await ctx.stub.putState(allPartnersKey, Buffer.from(JSON.stringify([])));
    await ctx.stub.putState(earnPointsTransactionsKey, Buffer.from(JSON.stringify([])));
    await ctx.stub.putState(usePointsTransactionsKey, Buffer.from(JSON.stringify([])));

    console.info('============= END : Initialize Ledger ===========');
}

// Add a member on the ledger
async CreateMember(ctx, member) {
    member = JSON.parse(member);

    await ctx.stub.putState(member.accountNumber, Buffer.from(JSON.stringify(member)));

    return JSON.stringify(member);
}

// Add a partner on the ledger, and add it to the all-partners list
async CreatePartner(ctx, partner) {
    partner = JSON.parse(partner);

    await ctx.stub.putState(partner.id, Buffer.from(JSON.stringify(partner)));

    let allPartners = await ctx.stub.getState(allPartnersKey);
    allPartners = JSON.parse(allPartners);
    allPartners.push(partner);
    await ctx.stub.putState(allPartnersKey, Buffer.from(JSON.stringify(allPartners)));

    return JSON.stringify(partner);
}

// Record a transaction where a member earns points
async EarnPoints(ctx, earnPoints) {
    earnPoints = JSON.parse(earnPoints);
    earnPoints.timestamp = new Date((ctx.stub.txTimestamp.seconds.low*1000)).toGMTString();
    earnPoints.transactionId = ctx.stub.txId;

    let member = await ctx.stub.getState(earnPoints.member);
    member = JSON.parse(member);
    member.points += earnPoints.points;
    await ctx.stub.putState(earnPoints.member, Buffer.from(JSON.stringify(member)));

    let earnPointsTransactions = await ctx.stub.getState(earnPointsTransactionsKey);
    earnPointsTransactions = JSON.parse(earnPointsTransactions);
    earnPointsTransactions.push(earnPoints);
    await ctx.stub.putState(earnPointsTransactionsKey, Buffer.from(JSON.stringify(earnPointsTransactions)));

    return JSON.stringify(earnPoints);
}

// Record a transaction where a member redeems points
async UsePoints(ctx, usePoints) {
    usePoints = JSON.parse(usePoints);
    usePoints.timestamp = new Date((ctx.stub.txTimestamp.seconds.low*1000)).toGMTString();
    usePoints.transactionId = ctx.stub.txId;

    let member = await ctx.stub.getState(usePoints.member);
    member = JSON.parse(member);
    if (member.points < usePoints.points) {
        throw new Error('Member does not have sufficient points');
    }
    member.points -= usePoints.points;
    await ctx.stub.putState(usePoints.member, Buffer.from(JSON.stringify(member)));

    let usePointsTransactions = await ctx.stub.getState(usePointsTransactionsKey);
    usePointsTransactions = JSON.parse(usePointsTransactions);
    usePointsTransactions.push(usePoints);
    await ctx.stub.putState(usePointsTransactionsKey, Buffer.from(JSON.stringify(usePointsTransactions)));

    return JSON.stringify(usePoints);
}

// Get earn points transactions of the particular member or partner
async EarnPointsTransactionsInfo(ctx, userType, userId) {
    let transactions = await ctx.stub.getState(earnPointsTransactionsKey);
    transactions = JSON.parse(transactions);
    let userTransactions = [];

    for (let transaction of transactions) {
        if (userType === 'member') {
            if (transaction.member === userId) {
                userTransactions.push(transaction);
            }
        } else if (userType === 'partner') {
            if (transaction.partner === userId) {
                userTransactions.push(transaction);
            }
        }
    }

    return JSON.stringify(userTransactions);
}

// Get use points transactions of the particular member or partner
async UsePointsTransactionsInfo(ctx, userType, userId) {
    let transactions = await ctx.stub.getState(usePointsTransactionsKey);
    transactions = JSON.parse(transactions);
    let userTransactions = [];

    for (let transaction of transactions) {
        if (userType === 'member') {
            if (transaction.member === userId) {
                userTransactions.push(transaction);
            }
        } else if (userType === 'partner') {
            if (transaction.partner === userId) {
                userTransactions.push(transaction);
            }
        }
    }

    return JSON.stringify(userTransactions);
}

// get the state from key
async GetState(ctx, key) {
    let data = await ctx.stub.getState(key);

    let jsonData = JSON.parse(data.toString());
    return JSON.stringify(jsonData);
}

module.exports = CustomerLoyalty;`

кажется, что есть синтаксическая ошибка с json.stringify. Я не знаю, что делать дальше, или как решить эту проблему. Есть идеи?