mirror of https://github.com/BTCPrivate/lnd.git
docs: Show macaroon usage with Java GRPC example.
This commit is contained in:
Brenden Matthews
parent
f7ec490f44
commit
eed0e9ac67
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@ -62,6 +62,11 @@ The following dependencies are required.
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<artifactId>netty-tcnative-boringssl-static</artifactId>
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<version>2.0.7.Final</version>
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</dependency>
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<dependency>
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<groupId>commons-codec</groupId>
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<artifactId>commons-codec</artifactId>
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<version>1.11</version>
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</dependency>
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</dependencies>
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```
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In the build section, we'll need to configure the following things :
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@ -98,32 +103,83 @@ In the build section, we'll need to configure the following things :
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```
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#### Main.java
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```java
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import io.grpc.Attributes;
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import io.grpc.CallCredentials;
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import io.grpc.ManagedChannel;
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import io.grpc.Metadata;
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import io.grpc.MethodDescriptor;
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import io.grpc.Status;
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import io.grpc.netty.GrpcSslContexts;
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import io.grpc.netty.NettyChannelBuilder;
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import io.netty.handler.ssl.SslContext;
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import lnrpc.LightningGrpc;
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import lnrpc.LightningGrpc.LightningBlockingStub;
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import lnrpc.Rpc.*;
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import lnrpc.Rpc.GetInfoRequest;
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import lnrpc.Rpc.GetInfoResponse;
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import org.apache.commons.codec.binary.Hex;
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import javax.net.ssl.SSLException;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.util.concurrent.Executor;
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public class Main {
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static class MacaroonCallCredential implements CallCredentials {
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private final String macaroon;
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private static final String CERT_PATH = "/Users/user/Library/Application Support/Lnd/tls.cert";
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private static final String HOST = "localhost";
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private static final int PORT = 10009;
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public static void main(String... args) throws SSLException {
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SslContext sslContext = GrpcSslContexts.forClient().trustManager(new File(CERT_PATH)).build();
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NettyChannelBuilder channelBuilder = NettyChannelBuilder.forAddress(HOST, PORT);
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ManagedChannel channel = channelBuilder.sslContext(sslContext).build();
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LightningBlockingStub stub = LightningGrpc.newBlockingStub(channel);
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GetInfoResponse response = stub.getInfo(GetInfoRequest.getDefaultInstance());
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System.out.println(response.getIdentityPubkey());
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MacaroonCallCredential(String macaroon) {
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this.macaroon = macaroon;
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}
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public void thisUsesUnstableApi() {}
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public void applyRequestMetadata(
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MethodDescriptor < ? , ? > methodDescriptor,
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Attributes attributes,
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Executor executor,
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final MetadataApplier metadataApplier
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) {
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String authority = attributes.get(ATTR_AUTHORITY);
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System.out.println(authority);
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executor.execute(new Runnable() {
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public void run() {
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try {
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Metadata headers = new Metadata();
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Metadata.Key < String > macaroonKey = Metadata.Key.of("macaroon", Metadata.ASCII_STRING_MARSHALLER);
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headers.put(macaroonKey, macaroon);
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metadataApplier.apply(headers);
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} catch (Throwable e) {
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metadataApplier.fail(Status.UNAUTHENTICATED.withCause(e));
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}
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}
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});
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}
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}
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private static final String CERT_PATH = "/Users/user/Library/Application Support/Lnd/tls.cert";
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private static final String MACAROON_PATH = "/Users/user/Library/Application Support/Lnd/admin.macaroon";
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private static final String HOST = "localhost";
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private static final int PORT = 10009;
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public static void main(String...args) throws IOException {
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SslContext sslContext = GrpcSslContexts.forClient().trustManager(new File(CERT_PATH)).build();
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NettyChannelBuilder channelBuilder = NettyChannelBuilder.forAddress(HOST, PORT);
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ManagedChannel channel = channelBuilder.sslContext(sslContext).build();
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String macaroon =
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Hex.encodeHexString(
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Files.readAllBytes(Paths.get(MACAROON_PATH))
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);
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LightningBlockingStub stub = LightningGrpc
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.newBlockingStub(channel)
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.withCallCredentials(new MacaroonCallCredential(macaroon));
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GetInfoResponse response = stub.getInfo(GetInfoRequest.getDefaultInstance());
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System.out.println(response.getIdentityPubkey());
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}
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}
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```
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#### Running the example
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@ -143,27 +199,27 @@ mvn compile exec:java -Dexec.mainClass="Main" -Dexec.cleanupDaemonThreads=false
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[INFO] os.detected.version.major: 10
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[INFO] os.detected.version.minor: 13
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[INFO] os.detected.classifier: osx-x86_64
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[INFO]
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[INFO]
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[INFO] ------------------------------------------------------------------------
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[INFO] Building lightning-client 0.0.1-SNAPSHOT
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[INFO] ------------------------------------------------------------------------
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[INFO]
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[INFO]
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[INFO] --- protobuf-maven-plugin:0.5.0:compile (default) @ lightning-client ---
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[INFO] Compiling 3 proto file(s) to /Users/user/Documents/Projects/lightningclient/target/generated-sources/protobuf/java
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[INFO]
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[INFO]
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[INFO] --- protobuf-maven-plugin:0.5.0:compile-custom (default) @ lightning-client ---
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[INFO] Compiling 3 proto file(s) to /Users/user/Documents/Projects/lightningclient/target/generated-sources/protobuf/grpc-java
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[INFO]
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[INFO]
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[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ lightning-client ---
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[INFO] Using 'UTF-8' encoding to copy filtered resources.
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[INFO] Copying 0 resource
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[INFO] Copying 3 resources
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[INFO] Copying 3 resources
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[INFO]
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[INFO]
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[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ lightning-client ---
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[INFO] Changes detected - recompiling the module!
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[INFO] Compiling 12 source files to /Users/user/Documents/Projects/lightningclient/target/classes
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[INFO]
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[INFO]
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[INFO] --- exec-maven-plugin:1.6.0:java (default-cli) @ lightning-client ---
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032562215c38dede6f1f2f262ff4c8db58a38ecf889e8e907eee8e4c320e0b5e81
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[INFO] ------------------------------------------------------------------------
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@ -181,4 +237,4 @@ There are 2 options available that can be used in the *rpc.proto* file :
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* option java_multiple_files = true;
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* option java_package = "network.lightning.rpc";
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>The package you want to use for your generated Java classes. If no explicit java_package option is given in the .proto file, then by default the proto package (specified using the "package" keyword in the .proto file) will be used. However, proto packages generally do not make good Java packages since proto packages are not expected to start with reverse domain names. If not generating Java code, this option has no effect.
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>The package you want to use for your generated Java classes. If no explicit java_package option is given in the .proto file, then by default the proto package (specified using the "package" keyword in the .proto file) will be used. However, proto packages generally do not make good Java packages since proto packages are not expected to start with reverse domain names. If not generating Java code, this option has no effect.
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