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 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 get(self, txhash):
serialized_tx = None
try:
serialized_tx = self.txDB[repr(txhash)]
except KeyError:
return None
f = cStringIO.StringIO(serialized_tx)
ret = CTransaction()
ret.deserialize(f)
ret.calc_sha256()
return ret
def get(self, txhash):
serialized_tx = None
try:
serialized_tx = self.txDB[repr(txhash)]
except KeyError:
return None
f = cStringIO.StringIO(serialized_tx)
ret = CTransaction()
ret.deserialize(f)
ret.calc_sha256()
return ret
def create_tampered_rawtx_cbh(node_from, node_to, tx_amount, fee, mode):
genesis_block_hash = node_from.getblock(str(0))['hash']
# select necessary UTXOs
usp = node_from.listunspent()
assert (len(usp) != 0)
amount = Decimal('0')
inputs = []
for x in usp:
amount += Decimal(x['amount'])
inputs.append({"txid": x['txid'], "vout": x['vout']})
if amount >= tx_amount + fee:
break
outputs = {
node_from.getnewaddress(): (Decimal(amount) - tx_amount - fee),
node_to.getnewaddress(): tx_amount
}
rawTx = node_from.createrawtransaction(inputs, outputs)
# build an object from the raw Tx in order to be able to modify it
tx_01 = CTransaction()
f = StringIO(unhexlify(rawTx))
tx_01.deserialize(f)
# corrupt vouts in this Tx
for vout_idx in range(len(tx_01.vout)):
decodedScriptOrig = node_from.decodescript(
hexlify(tx_01.vout[vout_idx].scriptPubKey))
scriptOrigAsm = decodedScriptOrig['asm']
params = scriptOrigAsm.split()
hash160 = hex_str_to_bytes(params[2])
original_height = int(params[6])
original_hash = hex_str_to_bytes(params[5])
if mode == MODE_HEIGHT:
# new referenced block height
evil_height = -1
# new referenced block hash
modTargetHash = hex_str_to_bytes(swap_bytes(genesis_block_hash))
# build modified script: CScript is putting a 4f (OP_NEGATE) for our -1
# edit script.py to send different stuff for the -1 value (like ff itself!)
modScriptPubKey = CScript([
OP_DUP, OP_HASH160, hash160, OP_EQUALVERIFY, OP_CHECKSIG,
modTargetHash, evil_height, OP_CHECKBLOCKATHEIGHT
])
elif mode == MODE_SWAP_ARGS:
modScriptPubKey = CScript([
OP_DUP, OP_HASH160, hash160, OP_EQUALVERIFY, OP_CHECKSIG,
original_height, original_hash, OP_CHECKBLOCKATHEIGHT
])
elif mode == MODE_NON_MIN_ENC:
non_min_h = hex_str_to_bytes("07000000")
modScriptPubKey = CScript([
OP_DUP, OP_HASH160, hash160, OP_EQUALVERIFY, OP_CHECKSIG,
original_hash, non_min_h, OP_CHECKBLOCKATHEIGHT
])
else:
assert (False)
tx_01.vout[vout_idx].scriptPubKey = modScriptPubKey
tx_01.rehash()
signedRawTx = node_from.signrawtransaction(ToHex(tx_01))
return signedRawTx