在 Hyperledger Fabric V1.0 的本地开发环境中使用 REST API 支持

Question

我已经设置了一个 HyperLedger Fabric V1.0 网络 与 4 个组织 每个都有1 对等 按照步骤 Building Your First Network.

Now I have

org1.example.com - with peer: peer0.org1.example.com and msp: Org1MSP

org2.example.com - with peer: peer0.org2.example.com and msp: Org2MSP

org3.example.com - with peer: peer0.org3.example.com and msp: Org3MSP

org4.example.com - with peer: peer0.org4.example.com and msp: Org4MSP

现在我可以将链代码安装到对等点并在通道上实例化链代码。我还可以使用 here 中提到的命令调用和查询链码，例如

Invoke:
peer chaincode invoke -o orderer.example.com:7050 --tls $CORE_PEER_TLS_ENABLED --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C $CHANNEL_NAME -n mycc -c '{"Args":["invoke","a","b","10"]}'

Query:
peer chaincode query -C $CHANNEL_NAME -n mycc -c '{"Args":["query","a"]}'

我之前使用的是 IBM Bluemix 提供的 Hyperledger Fabric V0.6 服务，我的 java 应用程序通过 Rest API.

如何在此本地网络[=42=中使用Rest API ] setup using docker image?, 然后我的 java applications 可以与我的链代码交互。
由于我不太熟悉这个 本地网络 设置，请告诉我如何让它工作。

Note:
I am using Windows 7 machine and network is setup by running the commands in docker quick start terminal

提前致谢..

Answer 1

Hyperledger Fabric v.1.0.0 中没有 REST API，但是有 Java SDK 可用于与节点交互。您可以使用以下 Maven 依赖项设置您的 java 项目：

<dependency>
  <groupId>org.hyperledger.fabric-sdk-java</groupId>
  <artifactId>fabric-sdk-java</artifactId>
  <version>1.0.0</version>
</dependency>

现在您可以使用 SDK APIs 来 invoke/query 您的链代码：

获取 HF 客户端实例

    final HFClient client = HFClient.createNewInstance();

为客户设置加密材料

    // Set default crypto suite for HF client
    client.setCryptoSuite(CryptoSuite.Factory.getCryptoSuite());

    client.setUserContext(new User() {

        public String getName() {
            return "testUser";
        }

        public Set<String> getRoles() {
            return null;
        }

        public String getAccount() {
            return null;
        }

        public String getAffiliation() {
            return null;
        }

        public Enrollment getEnrollment() {
            return new Enrollment() {
                public PrivateKey getKey() {
                    // Load your private key
                }

                public String getCert() {
                    // Read client certificate
                }
            };
        }

        public String getMspId() {
            return "Org1MSP";
        }
    });

现在频道配置：

    final Channel channel = client.newChannel("mychannel");

    channel.addOrderer(client.newOrderer("orderer0", "grpc://localhost:7050"));
    channel.addPeer(client.newPeer("peer0", "grpc://localhost:7051"));

    channel.initialize();

创建交易提案：

    final TransactionProposalRequest proposalRequest = client.newTransactionProposalRequest();

    final ChaincodeID chaincodeID = ChaincodeID.newBuilder()
            .setName("myCC")
            .setVersion("1.0")
            .setPath("github.com/yourpackage/chaincode/")
            .build();

    proposalRequest.setChaincodeID(chaincodeID);
    proposalRequest.setFcn("fcn");
    proposalRequest.setProposalWaitTime(TimeUnit.SECONDS.toMillis(10));
    proposalRequest.setArgs(new String[]{"arg1", "arg2"});

发送提案

    final Collection<ProposalResponse> responses = channel.sendTransactionProposal(proposalRequest);

    CompletableFuture<BlockEvent.TransactionEvent> txFuture = channel.sendTransaction(responses, client.getUserContext());

    BlockEvent.TransactionEvent event = txFuture.get();

    System.out.println(event.toString());

在 Hyperledger Fabric V1.0 的本地开发环境中使用 REST API 支持

Use REST API support in local development environment for Hyperledger Fabric V1.0

java

blockchain

hyperledger

hyperledger-fabric

ibm-cloud