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Add the option to use a valid input in createNextBlock.

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This commit is contained in:
Matt Corallo 2012-07-09 01:46:50 +02:00 committed by Mike Hearn
parent de2a6db666
commit 0bdb9bc6f4
1 changed files with 20 additions and 11 deletions
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31
core/src/main/java/com/google/bitcoin/core/Block.java
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@ -854,14 +854,14 @@ public class Block extends Message {
* Returns a solved block that builds on top of this one. This exists for unit tests.
*/
Block createNextBlock(Address to, long time) {
return createNextBlock(to, time, EMPTY_BYTES);
return createNextBlock(to, null, time, EMPTY_BYTES);
}
/**
* Returns a solved block that builds on top of this one. This exists for unit tests.
* In this variant you can specify a public key (pubkey) for use in generating coinbase blocks.
*/
Block createNextBlock(Address to, long time, byte[] pubKey) {
Block createNextBlock(Address to, TransactionOutPoint prevOut, long time, byte[] pubKey) {
Block b = new Block(params);
b.setDifficultyTarget(difficultyTarget);
b.addCoinbaseTransaction(pubKey);
@ -871,13 +871,17 @@ public class Block extends Message {
Transaction t = new Transaction(params);
t.addOutput(new TransactionOutput(params, t, Utils.toNanoCoins(50, 0), to));
// The input does not really need to be a valid signature, as long as it has the right general form.
TransactionInput input = new TransactionInput(params, t, Script.createInputScript(EMPTY_BYTES, EMPTY_BYTES));
// Importantly the outpoint hash cannot be zero as that's how we detect a coinbase transaction in isolation
// but it must be unique to avoid 'different' transactions looking the same.
byte[] counter = new byte[32];
counter[0] = (byte) txCounter++;
counter[1] = 1;
input.getOutpoint().setHash(new Sha256Hash(counter));
TransactionInput input;
if (prevOut == null) {
input = new TransactionInput(params, t, Script.createInputScript(EMPTY_BYTES, EMPTY_BYTES));
// Importantly the outpoint hash cannot be zero as that's how we detect a coinbase transaction in isolation
// but it must be unique to avoid 'different' transactions looking the same.
byte[] counter = new byte[32];
counter[0] = (byte) txCounter++;
counter[1] = 1;
input.getOutpoint().setHash(new Sha256Hash(counter));
}else
input = new TransactionInput(params, t, Script.createInputScript(EMPTY_BYTES, EMPTY_BYTES), prevOut);
t.addInput(input);
b.addTransaction(t);
}
@ -893,9 +897,14 @@ public class Block extends Message {
return b;
}
// Visible for testing.
public Block createNextBlock(Address to, TransactionOutPoint prevOut) {
return createNextBlock(to, prevOut, Utils.now().getTime() / 1000, EMPTY_BYTES);
}
// Visible for testing.
public Block createNextBlock(Address to) {
return createNextBlock(to, Utils.now().getTime() / 1000);
return createNextBlock(to, null, Utils.now().getTime() / 1000, EMPTY_BYTES);
}
/**
@ -903,7 +912,7 @@ public class Block extends Message {
* This method is intended for test use only.
*/
Block createNextBlockWithCoinbase(byte[] pubKey) {
return createNextBlock(null, Utils.now().getTime() / 1000, pubKey);
return createNextBlock(null, null, Utils.now().getTime() / 1000, pubKey);
}
/**