diff options
| -rwxr-xr-x | qa/rpc-tests/p2p-segwit.py | 78 | ||||
| -rw-r--r-- | src/main.cpp | 5 | ||||
| -rw-r--r-- | src/policy/policy.cpp | 9 | ||||
| -rw-r--r-- | src/policy/policy.h | 4 |
4 files changed, 89 insertions, 7 deletions
diff --git a/qa/rpc-tests/p2p-segwit.py b/qa/rpc-tests/p2p-segwit.py index fa2c5d1f05..cd02692b1e 100755 --- a/qa/rpc-tests/p2p-segwit.py +++ b/qa/rpc-tests/p2p-segwit.py @@ -1086,6 +1086,82 @@ class SegWitTest(BitcoinTestFramework): self.old_node.announce_tx_and_wait_for_getdata(block4.vtx[0]) assert(block4.sha256 not in self.old_node.getdataset) + # V0 segwit outputs should be standard after activation, but not before. + def test_standardness_v0(self, segwit_activated): + print("\tTesting standardness of v0 outputs (%s activation)" % ("after" if segwit_activated else "before")) + assert(len(self.utxo)) + + witness_program = CScript([OP_TRUE]) + witness_hash = sha256(witness_program) + scriptPubKey = CScript([OP_0, witness_hash]) + + p2sh_pubkey = hash160(witness_program) + p2sh_scriptPubKey = CScript([OP_HASH160, p2sh_pubkey, OP_EQUAL]) + + # First prepare a p2sh output (so that spending it will pass standardness) + p2sh_tx = CTransaction() + p2sh_tx.vin = [CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b"")] + p2sh_tx.vout = [CTxOut(self.utxo[0].nValue-1000, p2sh_scriptPubKey)] + p2sh_tx.rehash() + + # Mine it on test_node to create the confirmed output. + self.test_node.test_transaction_acceptance(p2sh_tx, with_witness=True, accepted=True) + self.nodes[0].generate(1) + sync_blocks(self.nodes) + + # Now test standardness of v0 P2WSH outputs. + # Start by creating a transaction with two outputs. + tx = CTransaction() + tx.vin = [CTxIn(COutPoint(p2sh_tx.sha256, 0), CScript([witness_program]))] + tx.vout = [CTxOut(p2sh_tx.vout[0].nValue-10000, scriptPubKey)] + tx.vout.append(CTxOut(8000, scriptPubKey)) # Might burn this later + tx.rehash() + + self.std_node.test_transaction_acceptance(tx, with_witness=True, accepted=segwit_activated) + + # Now create something that looks like a P2PKH output. This won't be spendable. + scriptPubKey = CScript([OP_0, hash160(witness_hash)]) + tx2 = CTransaction() + if segwit_activated: + # if tx was accepted, then we spend the second output. + tx2.vin = [CTxIn(COutPoint(tx.sha256, 1), b"")] + tx2.vout = [CTxOut(7000, scriptPubKey)] + tx2.wit.vtxinwit.append(CTxInWitness()) + tx2.wit.vtxinwit[0].scriptWitness.stack = [witness_program] + else: + # if tx wasn't accepted, we just re-spend the p2sh output we started with. + tx2.vin = [CTxIn(COutPoint(p2sh_tx.sha256, 0), CScript([witness_program]))] + tx2.vout = [CTxOut(p2sh_tx.vout[0].nValue-1000, scriptPubKey)] + tx2.rehash() + + self.std_node.test_transaction_acceptance(tx2, with_witness=True, accepted=segwit_activated) + + # Now update self.utxo for later tests. + tx3 = CTransaction() + if segwit_activated: + # tx and tx2 were both accepted. Don't bother trying to reclaim the + # P2PKH output; just send tx's first output back to an anyone-can-spend. + sync_mempools(self.nodes) + tx3.vin = [CTxIn(COutPoint(tx.sha256, 0), b"")] + tx3.vout = [CTxOut(tx.vout[0].nValue-1000, CScript([OP_TRUE]))] + tx3.wit.vtxinwit.append(CTxInWitness()) + tx3.wit.vtxinwit[0].scriptWitness.stack = [witness_program] + tx3.rehash() + self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=True) + else: + # tx and tx2 didn't go anywhere; just clean up the p2sh_tx output. + tx3.vin = [CTxIn(COutPoint(p2sh_tx.sha256, 0), CScript([witness_program]))] + tx3.vout = [CTxOut(p2sh_tx.vout[0].nValue-1000, witness_program)] + tx3.rehash() + self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=True) + + self.nodes[0].generate(1) + sync_blocks(self.nodes) + self.utxo.pop(0) + self.utxo.append(UTXO(tx3.sha256, 0, tx3.vout[0].nValue)) + assert_equal(len(self.nodes[1].getrawmempool()), 0) + + # Verify that future segwit upgraded transactions are non-standard, # but valid in blocks. Can run this before and after segwit activation. def test_segwit_versions(self): @@ -1658,6 +1734,7 @@ class SegWitTest(BitcoinTestFramework): self.test_witness_tx_relay_before_segwit_activation() self.test_block_relay(segwit_activated=False) self.test_p2sh_witness(segwit_activated=False) + self.test_standardness_v0(segwit_activated=False) sync_blocks(self.nodes) @@ -1679,6 +1756,7 @@ class SegWitTest(BitcoinTestFramework): self.test_witness_input_length() self.test_block_relay(segwit_activated=True) self.test_tx_relay_after_segwit_activation() + self.test_standardness_v0(segwit_activated=True) self.test_segwit_versions() self.test_premature_coinbase_witness_spend() self.test_signature_version_1() diff --git a/src/main.cpp b/src/main.cpp index ed1b9a985d..052b739326 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1143,13 +1143,14 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C } // Reject transactions with witness before segregated witness activates (override with -prematurewitness) - if (!GetBoolArg("-prematurewitness",false) && !tx.wit.IsNull() && !IsWitnessEnabled(chainActive.Tip(), Params().GetConsensus())) { + bool witnessEnabled = IsWitnessEnabled(chainActive.Tip(), Params().GetConsensus()); + if (!GetBoolArg("-prematurewitness",false) && !tx.wit.IsNull() && !witnessEnabled) { return state.DoS(0, false, REJECT_NONSTANDARD, "no-witness-yet", true); } // Rather not work on nonstandard transactions (unless -testnet/-regtest) string reason; - if (fRequireStandard && !IsStandardTx(tx, reason)) + if (fRequireStandard && !IsStandardTx(tx, reason, witnessEnabled)) return state.DoS(0, false, REJECT_NONSTANDARD, reason); // Only accept nLockTime-using transactions that can be mined in the next diff --git a/src/policy/policy.cpp b/src/policy/policy.cpp index 0cd3ac7119..48080abc77 100644 --- a/src/policy/policy.cpp +++ b/src/policy/policy.cpp @@ -31,7 +31,7 @@ * DUP CHECKSIG DROP ... repeated 100 times... OP_1 */ -bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType) +bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType, const bool witnessEnabled) { std::vector<std::vector<unsigned char> > vSolutions; if (!Solver(scriptPubKey, whichType, vSolutions)) @@ -50,10 +50,13 @@ bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType) (!fAcceptDatacarrier || scriptPubKey.size() > nMaxDatacarrierBytes)) return false; + else if (!witnessEnabled && (whichType == TX_WITNESS_V0_KEYHASH || whichType == TX_WITNESS_V0_SCRIPTHASH)) + return false; + return whichType != TX_NONSTANDARD; } -bool IsStandardTx(const CTransaction& tx, std::string& reason) +bool IsStandardTx(const CTransaction& tx, std::string& reason, const bool witnessEnabled) { if (tx.nVersion > CTransaction::MAX_STANDARD_VERSION || tx.nVersion < 1) { reason = "version"; @@ -92,7 +95,7 @@ bool IsStandardTx(const CTransaction& tx, std::string& reason) unsigned int nDataOut = 0; txnouttype whichType; BOOST_FOREACH(const CTxOut& txout, tx.vout) { - if (!::IsStandard(txout.scriptPubKey, whichType)) { + if (!::IsStandard(txout.scriptPubKey, whichType, witnessEnabled)) { reason = "scriptpubkey"; return false; } diff --git a/src/policy/policy.h b/src/policy/policy.h index b82c9e66b8..6bf5ca0ee5 100644 --- a/src/policy/policy.h +++ b/src/policy/policy.h @@ -55,12 +55,12 @@ static const unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS = STANDARD_SCRIPT_ static const unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS = LOCKTIME_VERIFY_SEQUENCE | LOCKTIME_MEDIAN_TIME_PAST; -bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType); +bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType, const bool witnessEnabled = false); /** * Check for standard transaction types * @return True if all outputs (scriptPubKeys) use only standard transaction forms */ -bool IsStandardTx(const CTransaction& tx, std::string& reason); +bool IsStandardTx(const CTransaction& tx, std::string& reason, const bool witnessEnabled = false); /** * Check for standard transaction types * @param[in] mapInputs Map of previous transactions that have outputs we're spending |