private Result analyzeIsStandard() { // The IsStandard rules don't apply on testnet, because they're just a safety mechanism and we don't want to // crush innovation with valueless test coins. if (wallet != null && !wallet.getNetworkParameters().getId().equals(NetworkParameters.ID_MAINNET)) return Result.OK; RuleViolation ruleViolation = isStandard(tx); if (ruleViolation != RuleViolation.NONE) { nonStandard = tx; return Result.NON_STANDARD; } for (Transaction dep : dependencies) { ruleViolation = isStandard(dep); if (ruleViolation != RuleViolation.NONE) { nonStandard = dep; return Result.NON_STANDARD; } } return Result.OK; }
private Result analyzeIsStandard() { // The IsStandard rules don't apply on testnet, because they're just a safety mechanism and we don't want to // crush innovation with valueless test coins. if (wallet != null && !wallet.getNetworkParameters().getId().equals(NetworkParameters.ID_MAINNET)) return Result.OK; RuleViolation ruleViolation = isStandard(tx); if (ruleViolation != RuleViolation.NONE) { nonStandard = tx; return Result.NON_STANDARD; } for (Transaction dep : dependencies) { ruleViolation = isStandard(dep); if (ruleViolation != RuleViolation.NONE) { nonStandard = dep; return Result.NON_STANDARD; } } return Result.OK; }
private Result analyzeIsStandard() { // The IsStandard rules don't apply on testnet, because they're just a safety mechanism and we don't want to // crush innovation with valueless test coins. if (wallet != null && !wallet.getNetworkParameters().getId().equals(NetworkParameters.ID_MAINNET)) return Result.OK; RuleViolation ruleViolation = isStandard(tx); if (ruleViolation != RuleViolation.NONE) { nonStandard = tx; return Result.NON_STANDARD; } for (Transaction dep : dependencies) { ruleViolation = isStandard(dep); if (ruleViolation != RuleViolation.NONE) { nonStandard = dep; return Result.NON_STANDARD; } } return Result.OK; }
private Result analyzeIsStandard() { // The IsStandard rules don't apply on testnet, because they're just a safety mechanism and we don't want to // crush innovation with valueless test coins. if (wallet != null && !wallet.getNetworkParameters().getId().equals(NetworkParameters.ID_MAINNET)) return Result.OK; RuleViolation ruleViolation = isStandard(tx); if (ruleViolation != RuleViolation.NONE) { nonStandard = tx; return Result.NON_STANDARD; } long time = wallet.getLastBlockSeenTimeSecs(); final List<TransactionInput> inputs = tx.getInputs(); for (int i = 0; i < inputs.size(); i++) { TransactionInput input = inputs.get(i); RuleViolation violation = isInputSignedWithForkId(input, time > 1501590000); if (violation != RuleViolation.NONE) { log.warn("TX considered non-standard due to input {} violating rule {}", i, violation); return Result.NON_STANDARD; } } for (Transaction dep : dependencies) { ruleViolation = isStandard(dep); if (ruleViolation != RuleViolation.NONE) { nonStandard = dep; return Result.NON_STANDARD; } } return Result.OK; }
@Override public void onTransaction(Peer peer, Transaction tx) { Result result = DefaultRiskAnalysis.FACTORY.create(null, tx, NO_DEPS).analyze(); incrementCounter(TOTAL_KEY); log.info("tx {} result {}", tx.getHash(), result); incrementCounter(result.name()); if (result == Result.NON_STANDARD) incrementCounter(Result.NON_STANDARD + "-" + DefaultRiskAnalysis.isStandard(tx)); } });
@Test public void nonShortestPossiblePushData() { ScriptChunk nonStandardChunk = new ScriptChunk(OP_PUSHDATA1, new byte[75]); byte[] nonStandardScript = new ScriptBuilder().addChunk(nonStandardChunk).build().getProgram(); // Test non-standard script as an input. Transaction tx = new Transaction(PARAMS); assertEquals(DefaultRiskAnalysis.RuleViolation.NONE, DefaultRiskAnalysis.isStandard(tx)); tx.addInput(new TransactionInput(PARAMS, null, nonStandardScript)); assertEquals(DefaultRiskAnalysis.RuleViolation.SHORTEST_POSSIBLE_PUSHDATA, DefaultRiskAnalysis.isStandard(tx)); // Test non-standard script as an output. tx.clearInputs(); assertEquals(DefaultRiskAnalysis.RuleViolation.NONE, DefaultRiskAnalysis.isStandard(tx)); tx.addOutput(new TransactionOutput(PARAMS, null, COIN, nonStandardScript)); assertEquals(DefaultRiskAnalysis.RuleViolation.SHORTEST_POSSIBLE_PUSHDATA, DefaultRiskAnalysis.isStandard(tx)); }
@Test public void canonicalSignatureLowS() { // First, a synthetic test. TransactionSignature sig = TransactionSignature.dummy(); Script scriptHighS = ScriptBuilder .createInputScript(new TransactionSignature(sig.r, ECKey.CURVE.getN().subtract(sig.s))); assertEquals(RuleViolation.SIGNATURE_CANONICAL_ENCODING, DefaultRiskAnalysis.isInputStandard(new TransactionInput(PARAMS, null, scriptHighS.getProgram()))); // This is a real transaction. Its signatures S component is "low". Transaction tx1 = new Transaction(PARAMS, Utils.HEX.decode( "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")); assertEquals("2a1c8569b2b01ebac647fb94444d1118d4d00e327456a3c518e40d47d72cd5fe", tx1.getHashAsString()); assertEquals(RuleViolation.NONE, DefaultRiskAnalysis.isStandard(tx1)); // This tx is the same as the above, except for a "high" S component on the signature of input 1. // It was part of the Oct 2015 malleability attack. Transaction tx2 = new Transaction(PARAMS, Utils.HEX.decode( "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")); assertEquals("dbe4147cf89b89fd9fa6c8ce6a3e2adecb234db094ec88301ae09073ca17d61d", tx2.getHashAsString()); assertFalse(ECKey.ECDSASignature .decodeFromDER(new Script(tx2.getInputs().get(1).getScriptBytes()).getChunks().get(0).data) .isCanonical()); assertEquals(RuleViolation.SIGNATURE_CANONICAL_ENCODING, DefaultRiskAnalysis.isStandard(tx2)); }