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Check depth of spent coinbases during connectTransactions.

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This commit is contained in:
Matt Corallo 2012-07-16 03:19:01 +02:00 committed by Mike Hearn
parent c789b757f3
commit ef6e1b89ca
1 changed files with 7 additions and 1 deletions
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8
core/src/main/java/com/google/bitcoin/core/FullPrunedBlockChain.java
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@ -86,7 +86,6 @@ public class FullPrunedBlockChain extends AbstractBlockChain {
}
//TODO: Remove lots of duplicated code in the two connectTransactions
//TODO: More checking can be done here (eg spent-coinbase depth check)
@Override
protected TransactionOutputChanges connectTransactions(int height, Block block)
@ -132,6 +131,11 @@ public class FullPrunedBlockChain extends AbstractBlockChain {
in.getOutpoint().getIndex());
if (prevOut == null)
throw new VerificationException("Attempted to spend a non-existent or already spent output!");
// Coinbases can't be spent until they mature, to avoid re-orgs destroying entire transaction
// chains. The assumption is there will ~never be re-orgs deeper than the spendable coinbase
// chain depth.
if (height - prevOut.getHeight() < params.getSpendableCoinbaseDepth())
throw new VerificationException("Tried to spend coinbase at depth " + (height - prevOut.getHeight()));
// TODO: Check we're not spending the genesis transaction here. Satoshis code won't allow it.
if (enforceBIP16) {
try {
@ -206,6 +210,8 @@ public class FullPrunedBlockChain extends AbstractBlockChain {
in.getOutpoint().getIndex());
if (prevOut == null)
throw new VerificationException("Attempted spend of a non-existent or already spent output!");
if (newBlock.getHeight() - prevOut.getHeight() < params.getSpendableCoinbaseDepth())
throw new VerificationException("Tried to spend coinbase at depth " + (newBlock.getHeight() - prevOut.getHeight()));
if (enforcePayToScriptHash) {
try {
Script script = new Script(params, prevOut.getScriptBytes(), 0, prevOut.getScriptBytes().length);