def spend_sh_fund(tx_ins, wif_keys, tx_outs):
"""
spend script hash fund
the key point of an input comes from multisig address is that,
its sign script is combined with several individual signs
:param tx_ins: list with tuple(tx_id, idx, balance, address, redeem_script)
:param wif_keys: private keys in wif format,
technical should be the same order with the pubkey in redeem script,
but pycoin has inner control, so here order is not mandatory
:param tx_outs: balance, receiver_address
:return: raw hex and tx id
"""
_txs_in = []
_un_spent = []
for tx_id, idx, balance, address, _ in tx_ins:
# must h2b_rev NOT h2b
tx_id_b = h2b_rev(tx_id)
_txs_in.append(TxIn(tx_id_b, idx))
_un_spent.append(
Spendable(balance, network.contract.for_address(address), tx_id_b,
idx))
_txs_out = []
for balance, receiver_address in tx_outs:
_txs_out.append(
TxOut(balance, network.contract.for_address(receiver_address)))
version, lock_time = 1, 0
tx = Tx(version, _txs_in, _txs_out, lock_time)
tx.set_unspents(_un_spent)
# construct hash160_lookup[hash160] = (secret_exponent, public_pair, compressed) for each individual key
hash160_lookup = build_hash160_lookup(
[network.parse.wif(wif_key).secret_exponent() for wif_key in wif_keys],
[secp256k1_generator])
for i in range(0, len(tx_ins)):
# you can add some conditions that if the input script is not p2sh type, not provide p2sh_lookup,
# so that all kinds of inputs can work together
p2sh_lookup = build_p2sh_lookup([binascii.unhexlify(tx_ins[i][-1])])
r = BitcoinSolver(tx).solve(hash160_lookup,
i,
hash_type=SIGHASH_ALL,
p2sh_lookup=p2sh_lookup)
if isinstance(r, bytes):
tx.txs_in[i].script = r
else:
tx.txs_in[i].script = r[0]
tx.set_witness(i, r[1])
return tx.as_hex(), tx.id()
def tether_tx_sh(tx_ins, wif_keys, send_amount, receiver, change_address):
"""
spend usdt having p2sh utxo
WARNING!!! THIS FUNCTION IS NOT FULLY TESTED AS MY FUND WAS STOLEN BY A SON OF BITCH
AFTER I BY ACCIDENT COMMITTED MY PRIVATE KEY!!!
:param tx_ins: list with tuple(tx_id, idx, balance, address, redeem_script),
redeem_script is required for p2sh utxo, set it None for p2pkh utxo
:param wif_keys: private keys of the inputs
:param send_amount: (display amount) * (10 ** 8)
:param receiver: address to receive usdt
:param change_address: address to receive btc change
"""
_txs_in = []
_un_spent = []
total_bal = 0
for tx_id, idx, balance, address, _ in tx_ins:
total_bal += balance
# must h2b_rev NOT h2b
tx_id_b = h2b_rev(tx_id)
_txs_in.append(TxIn(tx_id_b, idx))
_un_spent.append(
Spendable(balance, network.contract.for_address(address), tx_id_b,
idx))
txn_fee = estimate_p2pkh_tx_bytes(len(tx_ins),
3) * recommend_satoshi_per_byte() / 3
_txs_out = [
TxOut(total_bal - txn_fee - MIN_BTC_OUT,
network.contract.for_address(change_address)),
TxOut(0, binascii.unhexlify(omni_tether_script(send_amount))),
TxOut(MIN_BTC_OUT, network.contract.for_address(receiver))
]
version, lock_time = 1, 0
tx = Tx(version, _txs_in, _txs_out, lock_time)
tx.set_unspents(_un_spent)
# construct hash160_lookup[hash160] = (secret_exponent, public_pair, compressed) for each individual key
hash160_lookup = build_hash160_lookup(
[network.parse.wif(wif_key).secret_exponent() for wif_key in wif_keys],
[secp256k1_generator])
for i in range(0, len(tx_ins)):
if tx_ins[i][-1]:
p2sh_lookup = build_p2sh_lookup(
[binascii.unhexlify(tx_ins[i][-1])])
else:
p2sh_lookup = None
r = BitcoinSolver(tx).solve(hash160_lookup,
i,
hash_type=SIGHASH_ALL,
p2sh_lookup=p2sh_lookup)
if isinstance(r, bytes):
tx.txs_in[i].script = r
else:
tx.txs_in[i].script = r[0]
tx.set_witness(i, r[1])
return tx.as_hex(), tx.id()