hyperledger-fabric - eventthub 的 Hyperledger Fabric 错误：未实现：未知服务原型。交付

问题描述

我正在使用带有 Angular 6 + NodeJs + Blockchain + CouchDB 的Hyperledger Fabric fabcar“ https://github.com/hyperledger/fabric-samples/tree/master ”示例，并进行了一些修改。

我正在尝试使用此架构执行 CRUD 操作。GET 操作我做的很成功，但是在做 POST 操作（更改所有权或向分类帐中添加一些数据）时出现错误。

错误： gtpl@gtpl-ThinkPad-T430s:~/Music/fabcar/fabcar$ node server.js running on port8000 Chnaging the car owner { Key: 'CAR0', owner: 'Pampa' } Store path:/home/gtpl/Music/fabcar/fabcar/hfc-key-store Successfully loaded user1 from persistence Assigning transaction_id: 07fb8c531615c4c5bd4668ecf5cb99c3135679eabf98a1d9c97d9ed0e8e56470 Transaction proposal was good Successfully sent Proposal and received ProposalResponse: Status - 200, message - "OK" Failed to invoke successfully :: Error: There was a problem with the eventhub ::Error: 12 UNIMPLEMENTED: unknown service protos.Deliver"

我的 controller.js 文件是这样的..

` router.post('/changeOwner',function(req, res){

var key = req.body.Key;
var owner = req.body.owner;

var fabric_client = new Fabric_Client();

var channel = fabric_client.newChannel('mychannel');
var peer = fabric_client.newPeer('grpc://localhost:7051');
channel.addPeer(peer);
var order = fabric_client.newOrderer('grpc://localhost:7050')
channel.addOrderer(order);

var member_user = null;
var store_path = path.join(os.homedir(), './Music/fabcar/fabcar/hfc-key-store');
console.log('Store path:'+store_path);
var tx_id = null;

Fabric_Client.newDefaultKeyValueStore({ path: store_path
}).then((state_store) => {
    fabric_client.setStateStore(state_store);
    var crypto_suite = Fabric_Client.newCryptoSuite();
    var crypto_store = Fabric_Client.newCryptoKeyStore({path: store_path});
    crypto_suite.setCryptoKeyStore(crypto_store);
    fabric_client.setCryptoSuite(crypto_suite);
    return fabric_client.getUserContext('user1', true);
}).then((user_from_store) => {
    if (user_from_store && user_from_store.isEnrolled()) {
        console.log('Successfully loaded user1 from persistence');
        member_user = user_from_store;
    } else {
        throw new Error('Failed to get user1.... run registerUser.js');
    }
    tx_id = fabric_client.newTransactionID();
    console.log("Assigning transaction_id: ", tx_id._transaction_id);
    var request = {
        chaincodeId: 'fabcar',
        fcn: 'changeCarOwner',
        args: [key,owner],
        chainId: 'mychannel',
        txId: tx_id
    };

    return channel.sendTransactionProposal(request);
}).then((results) => {
    var proposalResponses = results[0];
    var proposal = results[1];
    let isProposalGood = false;
    if (proposalResponses && proposalResponses[0].response &&
        proposalResponses[0].response.status === 200) {
            isProposalGood = true;
            console.log('Transaction proposal was good');
        } else {
            console.error('Transaction proposal was bad');
        }
    if (isProposalGood) {
        console.log(util.format(
            'Successfully sent Proposal and received ProposalResponse: Status - %s, message - "%s"',
            proposalResponses[0].response.status, proposalResponses[0].response.message));

        var request = {
            proposalResponses: proposalResponses,
            proposal: proposal
        };

        var transaction_id_string = tx_id.getTransactionID(); 

        var sendPromise = channel.sendTransaction(request);
        promises.push(sendPromise); 

        let event_hub = channel.newChannelEventHub('localhost:7051');
        let txPromise = new Promise((resolve, reject) => {
            let handle = setTimeout(() => {
                event_hub.disconnect();
                resolve({event_status : 'TIMEOUT'}); 
            }, 3000);
            event_hub.connect();
            event_hub.registerTxEvent(transaction_id_string, (tx, code) => {
                clearTimeout(handle);
                event_hub.unregisterTxEvent(transaction_id_string);
                event_hub.disconnect();

                var return_status = {event_status : code, tx_id : transaction_id_string};
                if (code !== 'VALID') {
                    console.error('The transaction was invalid, code = ' + code);
                    resolve(return_status); // we could use reject(new Error('Problem with the tranaction, event status ::'+code));
                } else {
                    console.log('The transaction has been committed on peer ' + event_hub.getPeerAddr());
                    resolve(return_status);
                }
            }, (err) => {
                reject(new Error('There was a problem with the eventhub ::'+err));
            });
        });
        promises.push(txPromise);

        return Promise.all(promises);
    } else {
        console.error('Failed to send Proposal or receive valid response. Response null or status is not 200. exiting...');
        res.send("Error: no car found");
    }
}).then((results) => {
    console.log('Send transaction promise and event listener promise have completed');
    if (results && results[0] && results[0].status === 'SUCCESS') {
        console.log('Successfully sent transaction to the orderer.');
        res.json(tx_id.getTransactionID())
    } else {
        console.error('Failed to order the transaction. Error code: ' + response.status);
        res.send("Error: no tuna catch found");
    }

    if(results && results[1] && results[1].event_status === 'VALID') {
        console.log('Successfully committed the change to the ledger by the peer');
        res.json(tx_id.getTransactionID())
    } else {
        console.log('Transaction failed to be committed to the ledger due to ::'+results[1].event_status);
    }
}).catch((err) => {
    console.error('Failed to invoke successfully :: ' + err);
    res.send("Error: no car found");
});

})`

无法弄清楚我错过了什么。需要澄清这一点。

标签： hyperledger-fabrichyperledger

hyperledger-fabric - eventthub 的 Hyperledger Fabric 错误：未实现：未知服务原型。交付

问题描述

解决方案

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