diff options
| -rw-r--r-- | test/functional/test_framework/blocktools.py | 53 |
1 files changed, 29 insertions, 24 deletions
diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py index 2086241214..5c2b1815e5 100644 --- a/test/functional/test_framework/blocktools.py +++ b/test/functional/test_framework/blocktools.py @@ -40,8 +40,11 @@ from .script import ( ) from .util import assert_equal -# Create a block (with regtest difficulty) +# From BIP141 +WITNESS_COMMITMENT_HEADER = b"\xaa\x21\xa9\xed" + def create_block(hashprev, coinbase, ntime=None): + """Create a block (with regtest difficulty).""" block = CBlock() if ntime is None: import time @@ -55,19 +58,16 @@ def create_block(hashprev, coinbase, ntime=None): block.calc_sha256() return block -# From BIP141 -WITNESS_COMMITMENT_HEADER = b"\xaa\x21\xa9\xed" - - def get_witness_script(witness_root, witness_nonce): witness_commitment = uint256_from_str(hash256(ser_uint256(witness_root) + ser_uint256(witness_nonce))) output_data = WITNESS_COMMITMENT_HEADER + ser_uint256(witness_commitment) return CScript([OP_RETURN, output_data]) - -# According to BIP141, blocks with witness rules active must commit to the -# hash of all in-block transactions including witness. def add_witness_commitment(block, nonce=0): + """Add a witness commitment to the block's coinbase transaction. + + According to BIP141, blocks with witness rules active must commit to the + hash of all in-block transactions including witness.""" # First calculate the merkle root of the block's # transactions, with witnesses. witness_nonce = nonce @@ -82,7 +82,6 @@ def add_witness_commitment(block, nonce=0): block.hashMerkleRoot = block.calc_merkle_root() block.rehash() - def serialize_script_num(value): r = bytearray(0) if value == 0: @@ -98,10 +97,11 @@ def serialize_script_num(value): r[-1] |= 0x80 return r -# Create a coinbase transaction, assuming no miner fees. -# If pubkey is passed in, the coinbase output will be a P2PK output; -# otherwise an anyone-can-spend output. def create_coinbase(height, pubkey=None): + """Create a coinbase transaction, assuming no miner fees. + + If pubkey is passed in, the coinbase output will be a P2PK output; + otherwise an anyone-can-spend output.""" coinbase = CTransaction() coinbase.vin.append(CTxIn(COutPoint(0, 0xffffffff), ser_string(serialize_script_num(height)), 0xffffffff)) @@ -117,9 +117,10 @@ def create_coinbase(height, pubkey=None): coinbase.calc_sha256() return coinbase -# Create a transaction. -# If the script_pub_key is not specified, make it anyone-can-spend. def create_transaction(prevtx, n, sig, value, script_pub_key=CScript()): + """Create a transaction. + + If the script_pub_key is not specified, make it anyone-can-spend.""" tx = CTransaction() assert(n < len(prevtx.vout)) tx.vin.append(CTxIn(COutPoint(prevtx.sha256, n), sig, 0xffffffff)) @@ -142,10 +143,12 @@ def get_legacy_sigopcount_tx(tx, accurate=True): count += CScript(j.scriptSig).GetSigOpCount(accurate) return count -# Create a scriptPubKey corresponding to either a P2WPKH output for the -# given pubkey, or a P2WSH output of a 1-of-1 multisig for the given -# pubkey. Returns the hex encoding of the scriptPubKey. def witness_script(use_p2wsh, pubkey): + """Create a scriptPubKey for a pay-to-wtiness TxOut. + + This is either a P2WPKH output for the given pubkey, or a P2WSH output of a + 1-of-1 multisig for the given pubkey. Returns the hex encoding of the + scriptPubKey.""" if not use_p2wsh: # P2WPKH instead pubkeyhash = hash160(hex_str_to_bytes(pubkey)) @@ -157,9 +160,10 @@ def witness_script(use_p2wsh, pubkey): pkscript = CScript([OP_0, scripthash]) return bytes_to_hex_str(pkscript) -# Return a transaction (in hex) that spends the given utxo to a segwit output, -# optionally wrapping the segwit output using P2SH. def create_witness_tx(node, use_p2wsh, utxo, pubkey, encode_p2sh, amount): + """Return a transaction (in hex) that spends the given utxo to a segwit output. + + Optionally wrap the segwit output using P2SH.""" if use_p2wsh: program = CScript([OP_1, hex_str_to_bytes(pubkey), OP_1, OP_CHECKMULTISIG]) addr = script_to_p2sh_p2wsh(program) if encode_p2sh else script_to_p2wsh(program) @@ -169,12 +173,13 @@ def create_witness_tx(node, use_p2wsh, utxo, pubkey, encode_p2sh, amount): assert_equal(node.getaddressinfo(addr)['scriptPubKey'], witness_script(use_p2wsh, pubkey)) return node.createrawtransaction([utxo], {addr: amount}) -# Create a transaction spending a given utxo to a segwit output corresponding -# to the given pubkey: use_p2wsh determines whether to use P2WPKH or P2WSH; -# encode_p2sh determines whether to wrap in P2SH. -# sign=True will have the given node sign the transaction. -# insert_redeem_script will be added to the scriptSig, if given. def send_to_witness(use_p2wsh, node, utxo, pubkey, encode_p2sh, amount, sign=True, insert_redeem_script=""): + """Create a transaction spending a given utxo to a segwit output. + + The output corresponds to the given pubkey: use_p2wsh determines whether to + use P2WPKH or P2WSH; encode_p2sh determines whether to wrap in P2SH. + sign=True will have the given node sign the transaction. + insert_redeem_script will be added to the scriptSig, if given.""" tx_to_witness = create_witness_tx(node, use_p2wsh, utxo, pubkey, encode_p2sh, amount) if (sign): signed = node.signrawtransactionwithwallet(tx_to_witness) |