Add dependencies

build.gradle

@@ -1,5 +1,15 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.6'
+    }
+}
+
 plugins {
     id 'java'
+    id 'com.google.protobuf' version '0.8.6'
 }
 
 group 'org.bdchain'
@@ -7,10 +17,34 @@ version '1.0-SNAPSHOT'
 
 sourceCompatibility = 1.8
 
+def grpc_java_version = '1.14.0'
+
+protobuf {
+    protoc {
+        artifact = "com.google.protobuf:protoc:3.6.0"
+    }
+    plugins {
+        grpc {
+            artifact = 'io.grpc:protoc-gen-grpc-java:' + grpc_java_version
+        }
+    }
+    generatedFilesBaseDir = "$projectDir/src"
+    generateProtoTasks {
+        all()*.plugins {
+            grpc {
+                outputSubDir = 'java'
+            }
+        }
+    }
+}
+
 repositories {
     mavenCentral()
 }
 
 dependencies {
+    compile 'io.grpc:grpc-netty-shaded:' + grpc_java_version
+    compile 'io.grpc:grpc-protobuf:' + grpc_java_version
+    compile 'io.grpc:grpc-stub:' + grpc_java_version
     testCompile group: 'junit', name: 'junit', version: '4.12'
 }