def alice_swap_tx(txid_to_spend, utxo_index, amount_to_send):
txout_script = coinExchangeScript(alice_public_key_BTC, bob_public_key_BTC, hash_of_secret())
txout = create_txout(amount_to_send, txout_script)
txin_scriptPubKey = P2PKH_scriptPubKey(alice_address_BTC)
txin = create_txin(txid_to_spend, utxo_index)
txin_scriptSig = P2PKH_scriptSig(txin, txout, txin_scriptPubKey,
alice_secret_key_BTC, alice_public_key_BTC)
tx = create_signed_transaction(txin, txout, txin_scriptPubKey,
txin_scriptSig)
print('Alice swap tx (BTC) created successfully!')
return tx, txout_script
def split_coins(amount_to_send, txid_to_spend, utxo_index, n, network):
txin_scriptPubKey = address.to_scriptPubKey()
txin = create_txin(txid_to_spend, utxo_index)
txout_scriptPubKey = address.to_scriptPubKey()
txout = create_txout(amount_to_send / n, txout_scriptPubKey)
tx = CMutableTransaction([txin], [txout] * n)
sighash = SignatureHash(txin_scriptPubKey, tx, 0, SIGHASH_ALL)
txin.scriptSig = CScript(
[private_key.sign(sighash) + bytes([SIGHASH_ALL]), public_key])
VerifyScript(txin.scriptSig, txin_scriptPubKey, tx, 0,
(SCRIPT_VERIFY_P2SH, ))
response = broadcast_transaction(tx, network)
print(response.status_code, response.reason)
print(response.text)
def redeem_swap(amount_to_send, bob_swap_tx, txin_scriptPubKey):
txout_script = P2PKH_scriptPubKey(alice_address_BCY)
txout = create_txout(amount_to_send, txout_script)
txin = create_txin(b2x(bob_swap_tx.GetTxid()), 0)
tx = CMutableTransaction([txin], [txout])
alice_signature_BCY = sign_BCY(tx, txin_scriptPubKey)
txin_scriptSig = coinExchangeScriptSig1(alice_signature_BCY, alice_secret_x)
txin.scriptSig = CScript(txin_scriptSig)
VerifyScript(txin.scriptSig, CScript(txin_scriptPubKey),
tx, 0, (SCRIPT_VERIFY_P2SH,))
print('Alice redeem from swap tx (BCY) created successfully!')
return tx, alice_secret_x
def send_from_P2PKH_transaction(amount_to_send, txid_to_spend, utxo_index,
txout_scriptPubKey, sender_private_key,
network):
sender_public_key = sender_private_key.pub
sender_address = P2PKHBitcoinAddress.from_pubkey(sender_public_key)
txout = create_txout(amount_to_send, txout_scriptPubKey)
txin_scriptPubKey = P2PKH_scriptPubKey(sender_address)
txin = create_txin(txid_to_spend, utxo_index)
txin_scriptSig = P2PKH_scriptSig(txin, txout, txin_scriptPubKey,
sender_private_key, sender_public_key)
new_tx = create_signed_transaction(txin, txout, txin_scriptPubKey,
txin_scriptSig)
return broadcast_transaction(new_tx, network)
def return_coins_tx(amount_to_send, last_tx, lock_time, script):
txin = create_txin(b2x(last_tx.GetTxid()), 0)
txout = create_txout(amount_to_send, P2PKH_scriptPubKey(alice_address_BTC))
tx = CMutableTransaction([txin], [txout], nLockTime=lock_time)
return tx
