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Add a tool that prints out an arbitrary block given its hash.

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Mike Hearn 2011-07-06 13:43:46 +00:00
parent 10fef0b480
commit ff52cfd86b
1 changed files with 46 additions and 0 deletions
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src/com/google/bitcoin/examples/FetchBlock.java Normal file
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/*
* Copyright 2011 Google Inc.
*
* Licensed 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.
*/
package com.google.bitcoin.examples;
import com.google.bitcoin.core.*;
import com.google.bitcoin.store.BlockStore;
import com.google.bitcoin.store.MemoryBlockStore;
import java.net.InetAddress;
import java.util.concurrent.Future;
/**
* Downloads the block given a block hash from the localhost node and prints it out.
*/
public class FetchBlock {
public static void main(String[] args) throws Exception {
System.out.println("Connecting to node");
final NetworkParameters params = NetworkParameters.prodNet();
NetworkConnection conn = new NetworkConnection(InetAddress.getLocalHost(), params, 0, 60000);
BlockStore blockStore = new MemoryBlockStore(params);
BlockChain chain = new BlockChain(params, blockStore);
Peer peer = new Peer(params, conn, chain);
peer.start();
Sha256Hash blockHash = new Sha256Hash(args[0]);
Future<Block> future = peer.getBlock(blockHash);
System.out.println("Waiting for node to send us the requested block: " + blockHash);
Block block = future.get();
System.out.println(block);
peer.disconnect();
}
}