def create_transaction(self, node, coinbase, to_address, amount):
from_txid = node.getblock(coinbase)["tx"][0]
inputs = [{"txid": from_txid, "vout": 0}]
outputs = {to_address: amount}
rawtx = node.createrawtransaction(inputs, outputs)
signresult = node.signrawtransaction(rawtx)
tx = ctransaction()
f = cstringio.stringio(unhexlify(signresult["hex"]))
tx.deserialize(f)
return tx
def signaturehash(script, txto, inidx, hashtype):
"""consensus-correct signaturehash
returns (hash, err) to precisely match the consensus-critical behavior of
the sighash_single bug. (inidx is *not* checked for validity)
"""
hash_one = b'\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
if inidx >= len(txto.vin):
return (hash_one, "inidx %d out of range (%d)" % (inidx, len(txto.vin)))
txtmp = ctransaction(txto)
for txin in txtmp.vin:
txin.scriptsig = b''
txtmp.vin[inidx].scriptsig = findanddelete(script, cscript([op_codeseparator]))
if (hashtype & 0x1f) == sighash_none:
txtmp.vout = []
for i in range(len(txtmp.vin)):
if i != inidx:
txtmp.vin[i].nsequence = 0
elif (hashtype & 0x1f) == sighash_single:
outidx = inidx
if outidx >= len(txtmp.vout):
return (hash_one, "outidx %d out of range (%d)" % (outidx, len(txtmp.vout)))
tmp = txtmp.vout[outidx]
txtmp.vout = []
for i in range(outidx):
txtmp.vout.append(ctxout())
txtmp.vout.append(tmp)
for i in range(len(txtmp.vin)):
if i != inidx:
txtmp.vin[i].nsequence = 0
if hashtype & sighash_anyonecanpay:
tmp = txtmp.vin[inidx]
txtmp.vin = []
txtmp.vin.append(tmp)
s = txtmp.serialize()
s += struct.pack(b"<i", hashtype)
hash = hash256(s)
return (hash, none)
