Fabric Java SDK提供的发送Create Channel请求的代码在哪个文件

在Fabric Java SDK中，发送Create Channel请求的代码通常是在`ChannelClient`类中实现的。具体来说，`ChannelClient`类中的`createChannel`方法可以用于创建通道，该方法将创建和签署包含新通道配置的交易并将其提交到区块链网络以创建新通道。

以下是一个示例代码片段，演示如何使用`ChannelClient`类创建通道：

ChannelClient channelClient = new ChannelClient(channel);
CreateChannelRequest createChannelRequest = new CreateChannelRequest(channelConfiguration, signature, orderer);
channelClient.createChannel(createChannelRequest);

其中，`channel`是已连接到网络的通道对象，`channelConfiguration`是包含新通道配置的protobuf对象，`signature`是签名对象，`orderer`是订购服务节点对象。

请注意，这只是一个示例，实际应用中可能需要根据不同的场景进行适当的修改。

相关问题

fabric java sdk有发送createchannel请求的代码吗

是的，Fabric Java SDK提供了发送Create Channel请求的代码。下面是一个示例代码片段：

// 创建HFClient对象和ChannelConfiguration对象
HFClient client = HFClient.createNewInstance();
ChannelConfiguration channelConfiguration = new ChannelConfiguration(new File(channelConfigPath));

// 从orderer获取Genesis Block
Channel channel = client.newChannel(channelName);
channel.addOrderer(client.newOrderer(ordererName, ordererUrl));
channel.initialize();

// 创建CreateChannelRequest并设置属性
CreateChannelRequest createChannelRequest = client.newCreateChannelRequest(channelName, channelConfiguration);
createChannelRequest.setOrderer(client.newOrderer(ordererName, ordererUrl));

// 发送Create Channel请求并获取响应
Collection<Orderer> orderers = new ArrayList<>();
orderers.add(client.newOrderer(ordererName, ordererUrl));
Collection<ProposalResponse> responses = client.sendTransactionProposal(createChannelRequest, channel.getPeers());
Collection<ProposalResponse> successful = new ArrayList<>();
Collection<ProposalResponse> failed = new ArrayList<>();
for (ProposalResponse response : responses) {
    if (response.getStatus() == ChaincodeResponse.Status.SUCCESS) {
        successful.add(response);
    } else {
        failed.add(response);
    }
}

其中，`channelName`为要创建的通道名称，`channelConfigPath`为通道配置文件的路径，`ordererName`和`ordererUrl`为Orderer节点的名称和URL。在发送Create Channel请求之后，可以通过`successful`和`failed`集合获取响应结果。

fabric java sdk有发送createchannel2请求的代码吗

是的，以下是使用 Fabric Java SDK 发送 `createChannel` 请求的示例代码：

import org.hyperledger.fabric.gateway.Contract;
import org.hyperledger.fabric.gateway.ContractEvent;
import org.hyperledger.fabric.gateway.DefaultContract;
import org.hyperledger.fabric.gateway.Network;
import org.hyperledger.fabric.gateway.Transaction;
import org.hyperledger.fabric.gateway.Wallet;
import org.hyperledger.fabric.gateway.Wallet.Identity;
import org.hyperledger.fabric.gateway.impl.GatewayImpl;
import org.hyperledger.fabric.sdk.Channel;
import org.hyperledger.fabric.sdk.ChannelConfiguration;
import org.hyperledger.fabric.sdk.ChannelConfiguration.ChannelConfigurationBuilder;
import org.hyperledger.fabric.sdk.ChannelConfiguration.SignaturePolicyEnvelope;
import org.hyperledger.fabric.sdk.ChannelConfiguration.TransactionBuilder;
import org.hyperledger.fabric.sdk.ChannelConfiguration.TransactionRequestType;
import org.hyperledger.fabric.sdk.ChannelConfigurationBuilderFactory;
import org.hyperledger.fabric.sdk.ChannelConfigurationSignature;
import org.hyperledger.fabric.sdk.ChannelConfigurationSignatureReader;
import org.hyperledger.fabric.sdk.HFClient;
import org.hyperledger.fabric.sdk.NetworkConfig;
import org.hyperledger.fabric.sdk.Peer;
import org.hyperledger.fabric.sdk.ProposalResponse;
import org.hyperledger.fabric.sdk.SDKUtils;
import org.hyperledger.fabric.sdk.TransactionInfo;
import org.hyperledger.fabric.sdk.User;
import org.hyperledger.fabric.sdk.security.CryptoSuite;
import org.hyperledger.fabric.sdk.security.CryptoSuiteFactory;
import org.hyperledger.fabric.sdk.security.IdentityUser;
import org.hyperledger.fabric.sdk.security.keystore.KeyStore;
import org.hyperledger.fabric.sdk.security.keystore.KeyStoreFactory;
import org.hyperledger.fabric.sdk.security.keystore.KeyStoreReader;
import org.hyperledger.fabric.sdk.security.keystore.KeyStoreWriter;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.PrivateKey;
import java.util.Collection;
import java.util.EnumSet;
import java.util.Properties;

public class CreateChannelSample {
    private static final String CHANNEL_NAME = "mychannel";
    private static final String CHANNEL_TX_PATH = "src/main/resources/channel-artifacts/channel.tx";
    private static final String ORDERER_NAME = "orderer.example.com";
    private static final String ORDERER_URL = "grpc://localhost:7050";
    private static final String ORG_NAME = "Org1";
    private static final String ORG_MSP_ID = "Org1MSP";
    private static final String ORG_USER_NAME = "admin";
    private static final String ORG_USER_PASSWORD = "adminpw";
    private static final String ORG_PEER_NAME = "peer0.org1.example.com";
    private static final String ORG_PEER_URL = "grpc://localhost:7051";
    private static final String ORG_PEER_TLS_CERT_PATH = "src/main/resources/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/server.crt";

    public static void main(String[] args) throws Exception {
        // Load network configuration
        NetworkConfig networkConfig = NetworkConfig.fromYamlFile(new File("src/main/resources/network.yaml"));

        // Create wallet for user identity
        Wallet wallet = Wallet.createFileSystemWallet(Paths.get("wallet"));
        Identity identity = wallet.get("user1");
        if (identity == null) {
            Path certificatePath = Paths.get("src/main/resources/crypto-config/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/signcerts/User1@org1.example.com-cert.pem");
            Path privateKeyPath = Paths.get("src/main/resources/crypto-config/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/keystore/priv_sk");
            String certificate = new String(Files.readAllBytes(certificatePath));
            PrivateKey privateKey = SDKUtils.getPrivateKeyFromPEM(new String(Files.readAllBytes(privateKeyPath)));
            identity = IdentityUser.builder()
                    .name("user1")
                    .mspid(ORG_MSP_ID)
                    .certificate(certificate)
                    .privateKey(privateKey)
                    .build();
            wallet.put("user1", identity);
        }

        // Create client
        CryptoSuite cryptoSuite = CryptoSuiteFactory.getDefault().getCryptoSuite();
        KeyStore keyStore = KeyStoreFactory.getDefault().getKeyStore();
        KeyStoreReader keyStoreReader = new KeyStoreReader(keyStore);
        KeyStoreWriter keyStoreWriter = new KeyStoreWriter(keyStore);
        keyStoreWriter.addPrivateKey("orderer", cryptoSuite.generatePrivateKey(), keyStoreReader.getCertificate("orderer"));
        keyStoreWriter.addPrivateKey("peer", cryptoSuite.generatePrivateKey(), keyStoreReader.getCertificate("peer"));
        keyStoreWriter.addPrivateKey("user", identity.getPrivateKey(), identity.getCertificate());
        HFClient client = HFClient.createNewInstance();
        client.setCryptoSuite(cryptoSuite);
        client.setUserContext((User) identity);

        // Create channel configuration
        ChannelConfigurationBuilder configBuilder = ChannelConfigurationBuilderFactory.newChannelConfigurationBuilder();
        configBuilder.name(CHANNEL_NAME);
        configBuilder.orderer(ORDERER_NAME, ORDERER_URL);
        configBuilder.addPeer(ORG_PEER_NAME, ORG_PEER_URL, ORG_PEER_TLS_CERT_PATH);
        configBuilder.addOrderer("orderer.example.com", "grpc://localhost:7050");
        configBuilder.addOrganization(ORG_NAME, ORG_MSP_ID);
        configBuilder.addAnchorPeer(ORG_NAME, "peer0.org1.example.com", "grpc://localhost:7051");
        ChannelConfiguration configuration = configBuilder.build();

        // Create channel configuration signature
        SignaturePolicyEnvelope signaturePolicy = SignaturePolicyEnvelope.fromByteString(ByteString.copyFromUtf8("OR('Org1MSP.member')"));
        TransactionBuilder transactionBuilder = TransactionBuilder.newBuilder();
        transactionBuilder.setType(TransactionRequestType.CHANNEL_CONFIG);
        transactionBuilder.setPayload(configuration.toByteString());
        transactionBuilder.setChannelId(CHANNEL_NAME);
        transactionBuilder.setSignaturePolicy(signaturePolicy);
        transactionBuilder.setIdentity(identity);
        transactionBuilder.setMSPID(ORG_MSP_ID);
        byte[] transactionBytes = transactionBuilder.build().toByteArray();
        byte[] signature = cryptoSuite.sign(identity.getPrivateKey(), transactionBytes);
        ChannelConfigurationSignature configurationSignature = ChannelConfigurationSignature.newBuilder()
                .setSignature(ByteString.copyFrom(signature))
                .setSignatureHeader(ByteString.copyFrom(transactionBuilder.buildSignatureHeader()))
                .build();

        // Create gateway and connect to network
        GatewayImpl.Builder gatewayBuilder = (GatewayImpl.Builder) GatewayImpl.builder();
        gatewayBuilder.identity(wallet, "user1").networkConfig(networkConfig);
        GatewayImpl gateway = (GatewayImpl) gatewayBuilder.connect();
        Network network = gateway.getNetwork(CHANNEL_NAME);
        Contract contract = network.getContract("mycc");

        // Create channel
        Transaction createChannelTransaction = network.getChannel().newTransaction("createChannel");
        createChannelTransaction.setEndorsingPeers(EnumSet.of(network.getChannel().getPeers().iterator().next()));
        createChannelTransaction.submit(configuration.toByteString(), configurationSignature.toByteArray());

        // Wait for channel creation event
        ContractEvent contractEvent = contract.getEvent("createChannelEvent");
        Collection<ProposalResponse> responses = contractEvent.getTransactionEvent().getContractResponses();
        for (ProposalResponse response : responses) {
            TransactionInfo transactionInfo = network.getChannel().queryTransaction(response.getTransactionID());
            if (transactionInfo.isValid()) {
                System.out.println("Channel created successfully");
            } else {
                System.out.println("Failed to create channel");
            }
        }

        // Disconnect from network
        gateway.close();
    }
}

该示例代码中，我们首先加载了 Fabric 网络配置文件 `network.yaml`，然后创建了一个钱包 `wallet`，并将一个用户身份 `identity` 添加到钱包中。接着，我们使用 `CryptoSuiteFactory` 创建了一个加密套件 `cryptoSuite`，并使用 `KeyStoreFactory` 创建了一个密钥库 `keyStore`。然后，我们创建了一个 HFClient 客户端，并指定了客户端的加密套件和用户身份。接下来，我们创建了一个频道配置 `configuration`，并使用 `TransactionBuilder` 构建了一个包含频道配置的交易。此外，我们还创建了一个频道配置签名 `configurationSignature`。然后，我们使用 GatewayImpl 连接到 Fabric 网络，并获取名为 `mycc` 的智能合约。接下来，我们使用 `network.getChannel().newTransaction("createChannel")` 创建了一个新交易，将 `configuration.toByteString()` 和 `configurationSignature.toByteArray()` 作为参数传递给 `submit()` 方法，以提交创建频道的交易。最后，我们等待 `createChannelEvent` 事件的发生，并检查交易是否成功。最终，我们使用 `gateway.close()` 断开了与 Fabric 网络的连接。