devp2p-proxy/src/integrationTest/kotlin/org/apache/tuweni/devp2p/proxy/SendDataToAnotherNodeTest.kt

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
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package org.apache.tuweni.devp2p.proxy

import io.vertx.core.Vertx
import kotlinx.coroutines.runBlocking
import org.apache.tuweni.bytes.Bytes
import org.apache.tuweni.concurrent.AsyncCompletion
import org.apache.tuweni.concurrent.coroutines.await
import org.apache.tuweni.crypto.SECP256K1
import org.apache.tuweni.junit.BouncyCastleExtension
import org.apache.tuweni.junit.VertxExtension
import org.apache.tuweni.junit.VertxInstance
import org.apache.tuweni.rlpx.vertx.VertxRLPxService
import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.ExtendWith
import java.net.InetSocketAddress

@ExtendWith(VertxExtension::class, BouncyCastleExtension::class)
class SendDataToAnotherNodeTest {

  @Test
  fun testConnectTwoProxyNodes(@VertxInstance vertx: Vertx) = runBlocking {
    val service = VertxRLPxService(
      vertx,
      0,
      "127.0.0.1",
      0,
      SECP256K1.KeyPair.random(),
      listOf(
        ProxySubprotocol()
      ),
      "Tuweni Experiment 0.1"
    )

    val service2kp = SECP256K1.KeyPair.random()
    val service2 = VertxRLPxService(
      vertx,
      0,
      "127.0.0.1",
      0,
      service2kp,
      listOf(ProxySubprotocol()),
      "Tuweni Experiment 0.1"
    )
    val recorder = RecordingClientHandler()
    AsyncCompletion.allOf(service.start(), service2.start()).await()
    val client = service.getClient(ProxySubprotocol.ID) as ProxyClient
    client.registeredSites["datasink"] = recorder
    service.connectTo(service2kp.publicKey(), InetSocketAddress("127.0.0.1", service2.actualPort())).await()

    val client2 = service2.getClient(ProxySubprotocol.ID) as ProxyClient
    client2.request("datasink", Bytes.wrap("Hello world".toByteArray()))
    client2.request("datasink", Bytes.wrap("foo".toByteArray()))
    client2.request("datasink", Bytes.wrap("foobar".toByteArray()))

    assertEquals(recorder.messages[0], "Hello world")
    assertEquals(recorder.messages[1], "foo")
    assertEquals(recorder.messages[2], "foobar")
  }
}

class RecordingClientHandler : ClientHandler {

  val messages = mutableListOf<String>()

  override suspend fun handleRequest(message: Bytes): Bytes {
    messages.add(String(message.toArrayUnsafe()))
    return Bytes.wrap("OK".toByteArray())
  }
}