def create_ft(self, input_l: TxInput, input_r: TxInput, val_l: float, val_r: float) -> Transaction:
txs_in = [input_l, input_r]
tx_out = TxOutput(val_l + val_r - self.fee, scripts.get_script_ft_output(self.id_l, self.id_r))
tx = Transaction(txs_in, [tx_out])
sig_l = self.id_l.sk.sign_input(tx, 0 , self.id_l.p2pkh)
sig_r = self.id_r.sk.sign_input(tx, 1 , self.id_r.p2pkh)
input_l.script_sig = Script([sig_l, self.id_l.pk.to_hex()])
input_r.script_sig = Script([sig_r, self.id_r.pk.to_hex()])
return tx
def get_gen_punish_tx(tx_in: TxInput, payee: Id, script: Script, id_as: Id, secret_rev, val: int, fee: float, l: bool) -> Transaction:
tx_out = TxOutput(val-fee, payee.p2pkh)
tx = Transaction([tx_in], [tx_out])
sig = payee.sk.sign_input(tx, 0, Script(script))
sig_as = id_as.sk.sign_input(tx, 0, Script(script))
if l:
tx_in.script_sig = Script([secret_rev, sig_as, 0x0, sig])
else:
tx_in.script_sig = Script([secret_rev, sig_as, sig, 0x0])
return tx
def main():
# always remember to setup the network
setup('testnet')
# send 2 P2PKH inputs to 1 P2WPKH output
# create transaction inputs from tx ids of UTXOs (contained 0.002 tBTC)
txin = TxInput('eddfaa3d5a1c9a2a2961638aa4e28871b09ed9620f9077482248f368d46d8205', 1)
txin2 = TxInput('cf4b2987c06b9dd2ba6770af31a4942a4ea3e7194c0d64e8699e9fda03f50551', 1)
# create transaction output using P2WPKH scriptPubKey (locking script)
addr = P2wpkhAddress('tb1qlffsz7cgzmyzhklleu97afru7vwjytux4z4zsl')
txout = TxOutput(to_satoshis(0.0019), addr.to_script_pub_key())
#txout = TxOutput(to_satoshis(0.0019), Script([0, addr.to_hash()]) )
# create transaction from inputs/outputs -- default locktime is used
# note that this is not a segwit transaction since we don't spend segwit
tx = Transaction([txin, txin2], [txout]) #, has_segwit=True)
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private keys corresponding to the address that contains the
# UTXOs we are trying to spend to sign the input
sk = PrivateKey('cTALNpTpRbbxTCJ2A5Vq88UxT44w1PE2cYqiB3n4hRvzyCev1Wwo')
sk2 = PrivateKey('cVf3kGh6552jU2rLaKwXTKq5APHPoZqCP4GQzQirWGHFoHQ9rEVt')
# note that we pass the scriptPubkey as one of the inputs of sign_input
# because it is used to replace the scriptSig of the UTXO we are trying to
# spend when creating the transaction digest
from_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
sig = sk.sign_input( tx, 0, Script(['OP_DUP', 'OP_HASH160',
from_addr.to_hash160(), 'OP_EQUALVERIFY',
'OP_CHECKSIG']) )
from_addr2 = P2pkhAddress('mmYNBho9BWQB2dSniP1NJvnPoj5EVWw89w')
sig2 = sk2.sign_input( tx, 1, from_addr2.to_script_pub_key() )
# get public key as hex
pk = sk.get_public_key().to_hex()
pk2 = sk2.get_public_key().to_hex()
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
txin2.script_sig = Script([sig2, pk2])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
def createTxRefund(tx_er_input: TxInput, tx_state_input: TxInput, id_er: Id,
id_state_ref_left: Id, tx_state_lock_script: Script,
id_refund: Id, lock_coins: float, fee: float, eps: float,
rel_lock: int) -> (Transaction, str):
"""
Left user creates transaction for refund based on tx_state and tx_er, and signs it
:param tx_er_input: enable-refund transaction output reference
:param tx_state_input: tx_state locked output reference
:param id_er: id that owns output of enable-refund transaction
:param id_state_ref_left: id for signing spend of tx_state.out_lock by left user
:param tx_state_lock_script: lock script of tx_state.out_lock (for creating a signature)
:param id_refund: id that will own coins if transaction will be published
:param lock_coins: coins locked in tx_state
:param fee: coins paid to miners
:param eps: coins from enable-refund transaction
:param rel_lock: relative lock on tx_er_input (for creating a signature)
:return: tx_refund, signed by left user
"""
out_refund = TxOutput(lock_coins + eps - fee, id_refund.p2pkh)
tx_refund = Transaction([tx_er_input, tx_state_input], [out_refund])
er_in_lock_script = getEnableTxOutputLockScript(id_er.public_key, rel_lock)
sig_er_in = id_er.private_key.sign_input(tx_refund, 0, er_in_lock_script)
tx_er_input.script_sig = Script([sig_er_in, id_er.public_key.to_hex()])
# should be also signed by right for 2/2 multisig
sig_state_left = id_state_ref_left.private_key.sign_input(
tx_refund, 1, tx_state_lock_script)
return tx_refund, sig_state_left
def createTxPayAndSign(tx_state_input: TxInput, id_state_pay_right: Id,
tx_state_lock_script: Script, id_pay_receiver: Id,
lock_coins: float, fee: float) -> Transaction:
"""
Right can spend locked coins after time T wherever he wants
:param tx_state_input: tx_state locked output reference
:param id_state_pay_right: id for signing spend of tx_state.out_lock by right user
:param tx_state_lock_script: lock script of tx_state.out_lock (for creating a signature)
:param id_pay_receiver: id that will own coins if transaction will be published
:param lock_coins: coins locked in tx_state
:param fee: coins paid to miners
:return: transaction for pay to right user, valid after time T
"""
out_pay = TxOutput(lock_coins - fee, id_pay_receiver.p2pkh)
tx_pay = Transaction([tx_state_input], [out_pay])
signature = id_state_pay_right.private_key.sign_input(
tx_pay, 0, tx_state_lock_script)
tx_state_input.script_sig = Script([
signature,
id_state_pay_right.public_key.to_hex(), 'OP_0', 'OP_0', 'OP_0', 'OP_0',
'OP_0', 'OP_0'
])
return tx_pay
def main():
# always remember to setup the network
setup('testnet')
# create transaction input from tx id of UTXO (contained 0.4 tBTC)
txin = TxInput(
'fb48f4e23bf6ddf606714141ac78c3e921c8c0bebeb7c8abb2c799e9ff96ce6c', 0)
# create transaction output using P2PKH scriptPubKey (locking script)
addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
txout = TxOutput(
Decimal('0.1'),
Script([
'OP_DUP', 'OP_HASH160',
addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
# create another output to get the change - remaining 0.01 is tx fees
# note that this time we used to_script_pub_key() to create the P2PKH
# script
change_addr = P2pkhAddress('mmYNBho9BWQB2dSniP1NJvnPoj5EVWw89w')
change_txout = TxOutput(Decimal('0.29'), change_addr.to_script_pub_key())
#change_txout = TxOutput(Decimal('0.29'), Script(['OP_DUP', 'OP_HASH160',
# change_addr.to_hash160(),
# 'OP_EQUALVERIFY', 'OP_CHECKSIG']))
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout, change_txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to sign the input
sk = PrivateKey('cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
# note that we pass the scriptPubkey as one of the inputs of sign_input
# because it is used to replace the scriptSig of the UTXO we are trying to
# spend when creating the transaction digest
from_addr = P2pkhAddress('myPAE9HwPeKHh8FjKwBNBaHnemApo3dw6e')
sig = sk.sign_input(
tx, 0,
Script([
'OP_DUP', 'OP_HASH160',
from_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
#print(sig)
# get public key as hex
pk = sk.get_public_key()
pk = pk.to_hex()
#print (pk)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
def main():
# always remember to setup the network
setup('testnet')
#
# This script creates a P2SH address containing a P2PK script and sends
# some funds to it
#
# create transaction input from tx id of UTXO (contained 0.1 tBTC)
txin = TxInput(
'76464c2b9e2af4d63ef38a77964b3b77e629dddefc5cb9eb1a3645b1608b790f', 0)
# address we are spending from
from_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
# secret key of address that we are trying to spent
sk = PrivateKey('cTALNpTpRbbxTCJ2A5Vq88UxT44w1PE2cYqiB3n4hRvzyCev1Wwo')
#
# create transaction output using P2SH scriptPubKey (locking script)
# (the recipient will give us the final address but for now we create it
# for demonstration purposes)
#
# secret key corresponding to the pubkey needed for the P2SH (P2PK) transaction
p2pk_sk = PrivateKey(
'cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
p2pk_pk = p2pk_sk.get_public_key().to_hex()
redeem_script = Script([p2pk_pk, 'OP_CHECKSIG'])
txout = TxOutput(Decimal('0.09'), redeem_script.to_p2sh_script_pub_key())
# no change address - the remaining 0.01 tBTC will go to miners)
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to create the signature for the txin
sig = sk.sign_input(tx, 0, from_addr.to_script_pub_key())
#print(sig)
# get public key as hex
pk = sk.get_public_key()
pk = pk.to_hex()
#print (pk)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
def get_standard_ct_punish(tx_in: TxInput, payee: Id, script_ct: Script, secret, val: float, fee: float)-> Transaction:
tx_out = TxOutput(val-fee, payee.p2pkh)
tx = Transaction([tx_in], [tx_out])
sig = payee.sk.sign_input(tx, 0 , Script(script_ct))
tx_in.script_sig = Script([secret, sig])
return tx
def get_gen_split_tx(tx_in: TxInput, id_l: Id, id_r: Id, script: Script, val_l: int, val_r, fee: float) -> Transaction:
tx_out0 = TxOutput(val_l-0.5*fee, id_l.p2pkh)
tx_out1 = TxOutput(val_r-0.5*fee, id_r.p2pkh)
tx = Transaction([tx_in], [tx_out0, tx_out1])
sig_l = id_l.sk.sign_input(tx, 0, Script(script))
sig_r = id_r.sk.sign_input(tx, 0, Script(script))
tx_in.script_sig = Script([sig_r, sig_l])
return tx
def create_close_tx(self, valA: float, valB: float) -> Transaction:
tx_in = TxInput(self.ft.get_txid(), 0)
tx_out_l = TxOutput(valA - self.fee, self.id_l.p2pkh)
tx_out_r = TxOutput(valB - self.fee, self.id_r.p2pkh)
tx = Transaction([tx_in], [tx_out_l, tx_out_r])
sig_l = self.id_l.sk.sign_input(tx, 0 , scripts.get_script_ft_output(self.id_l, self.id_r))
sig_r = self.id_r.sk.sign_input(tx, 0 , scripts.get_script_ft_output(self.id_l, self.id_r))
tx_in.script_sig = Script([sig_r, sig_l])
return tx
def get_htlc(tx_in: TxInput, id_l: Id, id_r: Id, secret, hashed_secret, val_l: float, val_r: float, fee: float, l: bool, timelock) -> Transaction:
tx_out = TxOutput(val_l-fee/2, scripts.get_script_lightning_locked(id_l, id_r, hashed_secret, timelock)) # output to l
tx = Transaction([tx_in], [tx_out])
scriptFToutput = scripts.get_script_ft_output(id_l, id_r)
sig = id_l.sk.sign_input(tx, 0, scriptFToutput) # referenced tx is ft
tx_in.script_sig = Script([sig, secret])
return tx
def main():
# always remember to setup the network
setup('testnet') # same params as regest, which the node should run
# create transaction input from tx id of UTXO (contained 0.4 tBTC)
txin = TxInput(
'e2d08a63a540000222d6a92440436375d8b1bc89a2638dc5366833804287c83f', 1)
# create transaction output using P2PKH scriptPubKey (locking script)
addr = P2pkhAddress('msXP94TBncQ9usP6oZNpGweE24biWjJs2d')
# locking script expects 2 numbers that when added equal 5 (silly example)
txout = TxOutput(0.9, Script(['OP_ADD', 'OP_5', 'OP_EQUAL']))
# create another output to get the change - remaining 0.01 is tx fees
# note that this time we used to_script_pub_key() to create the P2PKH
# script
change_addr = P2pkhAddress('mrCDrCybB6J1vRfbwM5hemdJz73FwDBC8r')
change_txout = TxOutput(2, change_addr.to_script_pub_key())
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout, change_txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to sign the input
sk = PrivateKey('cMahea7zqjxrtgAbB7LSGbcQUr1uX1ojuat9jZodMN87JcbXMTcA')
# note that we pass the scriptPubkey as one of the inputs of sign_input
# because it is used to replace the scriptSig of the UTXO we are trying to
# spend when creating the transaction digest
from_addr = P2pkhAddress('mrCDrCybB6J1vRfbwM5hemdJz73FwDBC8r')
sig = sk.sign_input(
tx, 0,
Script([
'OP_DUP', 'OP_HASH160',
from_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
#print(sig)
# get public key as hex
pk = sk.get_public_key()
pk = pk.to_hex()
#print (pk)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
def get_gen_ct_tx(tx_in: TxInput, id_l: Id, id_r: Id, id_as_l: Id, hashed_secret_rev_l, id_as_r: Id, hashed_secret_rev_r, val: float, fee: float, timelock: int) -> Transaction:
timelock = 0x2
tx_out = TxOutput(val-fee, scripts.get_script_split(id_l, id_r, id_as_l, hashed_secret_rev_l, id_as_r, hashed_secret_rev_r, timelock))
tx = Transaction([tx_in], [tx_out])
scriptFToutput = scripts.get_script_ft_output(id_l, id_r)
sig_l = id_l.sk.sign_input(tx, 0 , scriptFToutput)
sig_r = id_r.sk.sign_input(tx, 0 , scriptFToutput)
tx_in.script_sig = Script([sig_r, sig_l])
return tx
def main():
# always remember to setup the network
setup('testnet')
#
# This script spends from a P2SH address containing a P2PK script
#
# create transaction input from tx id of UTXO (contained 0.1 tBTC)
txin = TxInput(
'7db363d5a7fabb64ccce154e906588f1936f34481223ea8c1f2c935b0a0c945b', 0)
# secret key needed to spend P2PK that is wrapped by P2SH
p2pk_sk = PrivateKey(
'cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
p2pk_pk = p2pk_sk.get_public_key().to_hex()
# create the redeem script - needed to sign the transaction
redeem_script = Script([p2pk_pk, 'OP_CHECKSIG'])
#TODELETE
#txin_script_pub_key = redeem_script.to_p2sh_script_pub_key()
to_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
txout = TxOutput(Decimal('0.08'), to_addr.to_script_pub_key())
# no change address - the remaining 0.01 tBTC will go to miners)
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to create the signature for the txin -
# note that the redeem script is passed to replace the scriptSig
sig = p2pk_sk.sign_input(tx, 0, redeem_script)
#print(sig)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, redeem_script.to_hex()])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
def get_standard_ct(tx_in: TxInput, id_l: Id, id_r: Id, hashed_secret, val_l: float, val_r: float, fee: float, l: bool, timelock) -> Transaction:
if l:
tx_out0 = TxOutput(val_l-fee/2, scripts.get_script_lightning_locked(id_l, id_r, hashed_secret, timelock)) # output to l
tx_out1 = TxOutput(val_r-fee/2, id_r.p2pkh) # output to r
else:
tx_out0 = TxOutput(val_r-fee/2, scripts.get_script_lightning_locked(id_r, id_l, hashed_secret, timelock)) # output to r
tx_out1 = TxOutput(val_l-fee/2, id_l.p2pkh) # output to l
tx = Transaction([tx_in], [tx_out0, tx_out1])
scriptFToutput = scripts.get_script_ft_output(id_l, id_r)
sig_l = id_l.sk.sign_input(tx, 0, scriptFToutput)
sig_r = id_r.sk.sign_input(tx, 0, scriptFToutput)
tx_in.script_sig = Script([sig_r, sig_l])
return tx
def main():
# always remember to setup the network
setup('testnet')
# the key that corresponds to the P2WPKH address
priv = PrivateKey('cNho8fw3bPfLKT4jPzpANTsxTsP8aTdVBD6cXksBEXt4KhBN7uVk')
pub = priv.get_public_key()
# the p2sh script and the corresponding address
redeem_script = pub.get_segwit_address().to_script_pub_key()
p2sh_addr = P2shAddress.from_script(redeem_script)
# the UTXO of the P2SH-P2WPKH that we are trying to spend
inp = TxInput('95c5cac558a8b47436a3306ba300c8d7af4cd1d1523d35da3874153c66d99b09', 0)
# exact amount of UTXO we try to spent
amount = 0.0014
# the address to send funds to
to_addr = P2pkhAddress('mvBGdiYC8jLumpJ142ghePYuY8kecQgeqS')
# the output sending 0.001 -- 0.0004 goes to miners as fee -- no change
out = TxOutput(to_satoshis(0.001), to_addr.to_script_pub_key())
# create a tx with at least one segwit input
tx = Transaction([inp], [out], has_segwit=True)
# script code is the script that is evaluated for a witness program type; each
# witness program type has a specific template for the script code
# script code that corresponds to P2WPKH (it is the classic P2PKH)
script_code = pub.get_address().to_script_pub_key()
# calculate signature using the appropriate script code
# remember to include the original amount of the UTXO
sig = priv.sign_segwit_input(tx, 0, script_code, to_satoshis(amount))
# script_sig is the redeem script passed as a single element
inp.script_sig = Script([redeem_script.to_hex()])
# finally, the unlocking script is added as a witness
tx.witnesses.append(Script([sig, pub.to_hex()]))
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + tx.serialize())
def main():
# always remember to setup the network
setup('regtest')
# create transaction input from tx id of UTXO (contained 0.4 tBTC)
txin = TxInput('4d9a6baf45d4b57c875fe83d5e0834568eae4b5ef6e61d13720ef6685168e663', 0)
# provide unlocking script
# note that no signing is required to unlock: OP_ADD OP_5 OP_EQUAL
txin.script_sig = Script(['OP_2', 'OP_3'])
# create transaction output using P2PKH scriptPubKey (locking script)
addr = P2pkhAddress('mrCDrCybB6J1vRfbwM5hemdJz73FwDBC8r')
# locking script expects 2 numbers that when added equal 5 (silly example)
txout = TxOutput( 0.8, addr.to_script_pub_key() )
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout])
# print raw transaction
print("\nRaw transaction:\n" + tx.serialize())
def _tx_encf(self, vk_p, ct_c, sk_u, txin_id, txin_index):
# create transaction input from tx id of UTXO
txin = TxInput(txin_id, txin_index)
# having the vk_p from the shared key generate the corresponding address for decoder to use to respond
vk_p = PublicKey(vk_p)
addr_p = vk_p.get_address().to_string()
# create transaction output using P2PKH scriptPubKey for paying address
paying_addr = P2pkhAddress(addr_p)
paying_txout = TxOutput(0.00002, paying_addr.to_script_pub_key())
# create an output where the address is the ciphertext
cipher_txout = TxOutput(0.00001,
Script(['OP_HASH160', ct_c, 'OP_EQUAL']))
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [paying_txout, cipher_txout])
#print("\nRaw unsigned transaction:\n" + tx.serialize())
# use private key corresponding to the address that contains the UTXO we are trying to spend to sign the input
vk_u = sk_u.get_public_key()
addr_u = vk_u.get_address().to_string()
# note that we pass the scriptPubkey as one of the inputs of sign_input because it is used to replace
# the scriptSig of the UTXO we are trying to spend when creating the transaction digest
from_addr = P2pkhAddress(addr_u)
sig = sk_u.sign_input(
tx, 0,
from_addr.to_script_pub_key()) # 0 is for the index of the input
# set the scriptSig (unlocking script)
vk_u = vk_u.to_hex()
txin.script_sig = Script([sig, vk_u])
signed_tx = tx.serialize()
print("Users input address: ", addr_u)
print("Decoder paying address: ", addr_p)
print("\nRaw signed transaction:\n" + signed_tx)
return signed_tx
def _tx_encb(self, sk_s, ct_r, txin_id, txin_index):
# create transaction input from tx id of UTXO
txin = TxInput(txin_id, txin_index)
# create an output where the address is the ciphertext[0:20]
cipher1_txout = TxOutput(
0.000001,
Script([
'OP_DUP', 'OP_HASH160', ct_r[:40], 'OP_EQUALVERIFY',
'OP_CHECKSIG'
]))
# create another output where the address is the ciphertext[20:40]
cipher2_txout = TxOutput(0.000001,
Script(['OP_HASH160', ct_r[40:], 'OP_EQUAL']))
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [cipher1_txout, cipher2_txout])
#print("\nRaw unsigned transaction:\n" + tx.serialize())
# use private key corresponding to the address that contains the UTXO we are trying to spend to sign the input
vk_p = sk_s.get_public_key()
addr_p = vk_p.get_address().to_string()
# note that we pass the scriptPubkey as one of the inputs of sign_input because it is used to replace
# the scriptSig of the UTXO we are trying to spend when creating the transaction digest
from_addr = P2pkhAddress(addr_p)
sig = sk_s.sign_input(tx, 0, from_addr.to_script_pub_key())
# set the scriptSig (unlocking script)
vk_p = vk_p.to_hex()
txin.script_sig = Script([sig, vk_p])
signed_tx = tx.serialize()
print("\nRaw signed transaction:\n" + signed_tx)
return signed_tx
def main():
# always remember to setup the network
setup('testnet')
#
# This script spends from a P2SH address containing a CSV+P2PKH script as
# created from examples/create_p2sh_csv_p2pkh.py
#
# We assume that some 11.1 tBTC have been send to that address and that we know
# the txid and the specific UTXO index (or vout).
#
# set values
relative_blocks = 20
txid = '76c102821b916a625bd3f0c3c6e35d5c308b7c23e78b8866b06a3a466041db0a'
vout = 0
seq = Sequence(TYPE_RELATIVE_TIMELOCK, relative_blocks)
# create transaction input from tx id of UTXO (contained 11.1 tBTC)
txin = TxInput(txid, vout, sequence=seq.for_input_sequence())
# secret key needed to spend P2PKH that is wrapped by P2SH
p2pkh_sk = PrivateKey(
'cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
p2pkh_pk = p2pkh_sk.get_public_key().to_hex()
p2pkh_addr = p2pkh_sk.get_public_key().get_address()
# create the redeem script - needed to sign the transaction
redeem_script = Script([
seq.for_script(), 'OP_CHECKSEQUENCEVERIFY', 'OP_DROP', 'OP_DUP',
'OP_HASH160',
p2pkh_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
])
# to confirm that address is the same as the one that the funds were sent
#addr = P2shAddress.from_script(redeem_script)
#print(addr.to_address())
# send/spend to any random address
to_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
txout = TxOutput(11, to_addr.to_script_pub_key())
# no change address - the remaining 0.1 tBTC will go to miners)
# create transaction from inputs/outputs
tx = Transaction([txin], [txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to create the signature for the txin -
# note that the redeem script is passed to replace the scriptSig
sig = p2pkh_sk.sign_input(tx, 0, redeem_script)
#print(sig)
# set the scriptSig (unlocking script) -- unlock the P2PKH (sig, pk) plus
# the redeem script, since it is a P2SH
txin.script_sig = Script([sig, p2pkh_pk, redeem_script.to_hex()])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
def main():
# always remember to setup the network
setup('regtest')
# RPC credentials for communicating with the node
rpcuser = '******'
rpcpass = '******'
proxy = NodeProxy(rpcuser, rpcpass).get_proxy()
# set values
block_height = 140
# secret key needed to spend P2PKH that is wrapped by P2SH
p2pkh_sk = PrivateKey(
'cSbKZh6a6wNUAQ8pr2KLKeZCQ4eJnFmN35wtReaoU4kCP97XQu6W')
# this is the P2SH address the funds have been locked in
p2shaddress = '2NGWStpuXtke1VXCTgNnzUgWbun7eY2f3nH'
# this is the address the funds will be sent to
to_addr = P2pkhAddress('mnS1ng5D1hdvLkYAK2oS8R1C4e37aQdVoC')
seq = Sequence(TYPE_ABSOLUTE_TIMELOCK, block_height)
lock = Locktime(block_height)
# import the address as watch-only
print('importaddress')
proxy.importaddress(p2shaddress, "P2SH absolute timelock", True)
# find all UTXOs for this address. 10.000.000 should be enough
print('listunspent')
list_unspent = proxy.listunspent(0, 9999999, [p2shaddress])
# create transaction inputs for all UTXOs. Calculate the total amount of
# bitcoins they contain
txin_list = []
total_amount = 0
for i in list_unspent:
txin = TxInput(i['txid'], i['vout'], sequence=seq.for_input_sequence())
txin_list.append(txin)
total_amount = total_amount + i['amount']
if total_amount == 0:
print("No funds to move")
sys.exit(0)
# derive public key and adddress from the private key
p2pkh_pk = p2pkh_sk.get_public_key().to_hex()
p2pkh_addr = p2pkh_sk.get_public_key().get_address()
# create the redeem script - needed to sign the transaction
redeem_script = Script([
seq.for_script(), 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP', 'OP_DUP',
'OP_HASH160',
p2pkh_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
])
# get fees using API. Although we may be running in regtest, we'll use the
# fees as if we were using testnet (fees are in satoshis)
url = 'https://api.blockcypher.com/v1/btc/test3'
resp = requests.get(url)
fee_per_kb = resp.json()['medium_fee_per_kb']
# calculate transaction size according to:
# in*180 + out*34 + 10 plus or minus 'in'
# https://bitcoin.stackexchange.com/questions/1195/how-to-calculate-transaction-size-before-sending-legacy-non-segwit-p2pkh-p2sh
# we'll play it safe and use the upper bound
tx_size = len(txin_list) * 180 + 34 + 10 + len(txin_list)
fees = tx_size * fee_per_kb / (1024 * 10**8)
print('fees:', fees)
# create the output
txout = TxOutput(
Decimal(total_amount) - Decimal(fees), to_addr.to_script_pub_key())
# create transaction from inputs/outputs
tx = Transaction(txin_list, [txout], lock.for_transaction())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to create the signatures for all txins -
# note that the redeem script is passed to replace the scriptSig
for i, txin in enumerate(txin_list):
sig = p2pkh_sk.sign_input(tx, i, redeem_script)
# set the scriptSig (unlocking script) -- unlock the P2PKH (sig, pk) plus
# the redeem script, since it is a P2SH
txin.script_sig = Script([sig, p2pkh_pk, redeem_script.to_hex()])
# serialize the transaction
signed_tx = tx.serialize()
# test if the transaction will be accepted by the mempool
print('testmempoolaccept')
res = proxy.testmempoolaccept([signed_tx])
print(res)
if not res[0]['allowed']:
print("Transaction not valid")
sys.exit(1)
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
def main():
# always remember to setup the network
setup('regtest')
#
# This script creates a P2SH address containing a CHECKLOCKTIMEVERIFY plus a P2PKH locking funds with a key as
# well as for an absolute amount of blocks or an absolute amount of seconds since the transaction.
#
parser = argparse.ArgumentParser(
description=
'Give the private key, a future time expressed either in block height or in UNIX Epoch time and '
'the P2SH address to send the funds')
parser.add_argument('key', help="Add the private key.")
parser.add_argument(
'-param',
type=int,
help="Add the number of blocks or the time expressed in seconds.")
parser.add_argument('-to_address',
type=str,
help="Add the adress that will sent/spend")
args = parser.parse_args()
# set values
key = args.key
absolute_param = args.param
send_address = args.to_address
# set Locktime
seq = Sequence(TYPE_ABSOLUTE_TIMELOCK, absolute_param)
locktime = Locktime(absolute_param)
# set proxy
username = "******"
password = "******"
proxy = NodeProxy(username, password).get_proxy()
# secret key corresponding to the pubkey needed for the P2SH (P2PKH) transaction
p2pkh_sk = PrivateKey(key)
p2pkh_pk = p2pkh_sk.get_public_key()
# get the address (from the public key)
p2pkh_addr = p2pkh_pk.get_address()
# print("Private key: " + p2pkh_sk. to_wif(compressed=True))
# print("Public key: " + p2pkh_pk.to_hex(compressed=True))
# print("P2PKH Address: " + p2pkh_addr.to_string())
# create the redeem script
redeem_script = Script([
seq.for_script(), 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP', 'OP_DUP',
'OP_HASH160',
p2pkh_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
])
# accept a P2SH address to get the funds from
addr = P2shAddress.from_script(redeem_script)
print("The P2SH address to get the funds from is : " + addr.to_string())
# check if the P2SH address has any UTXOs to get funds from
proxy.importaddress(addr.to_string(), "P2SH to get the funds from")
minconf = 0
maxconf = 99999999
my_list = proxy.listunspent(minconf, maxconf, [addr.to_string()])
# Gather all funds that the P2SH address received to send to the P2PKH address provided
txin_list = []
btc_to_send = 0
for i in my_list:
txin = TxInput(i['txid'], i['vout'], sequence=seq.for_input_sequence())
txin_list.append(txin)
btc_to_send = btc_to_send + i['amount']
if btc_to_send == 0:
print("No btc found to send")
quit()
# accept a P2PKH address to send the funds to
to_addr = P2pkhAddress(send_address)
print("The P2PKH address to send the funds to is : " + to_addr.to_string())
# calculate the appropriate fees with respect to the size of the transaction
response = requests.get("https://mempool.space/api/v1/fees/recommended")
fee_per_byte = response.json()['fastestFee']
print("Fastest fee per byte is : %d " % fee_per_byte)
# calculate transaction size as described at
# https://bitcoin.stackexchange.com/questions/1195/how-to-calculate-transaction-size-before-sending-legacy-non-segwit-p2pkh-p2sh
tx_size = len(my_list) * 180 + 34 + 10 + len(my_list)
total_fees = tx_size * fee_per_byte / (1024 * 10**8)
print('Total fees are : ', total_fees)
# Calculate the final amount
amount = btc_to_send - total_fees
# print(amount)
# Create transaction output
txout = TxOutput(to_satoshis(amount), to_addr.to_script_pub_key())
# Create transaction after the inputs and the outputs
tx = Transaction(txin_list, [txout], locktime.for_transaction())
# For each transaction - when dealing with multiple inputs, you will need to sign all of them
for i, txin in enumerate(my_list):
sig = p2pkh_sk.sign_input(tx, i, redeem_script)
# print(sig)
# set the scriptSig (unlocking script) -- unlock the P2PKH (sig, pk) plus
# the redeem script, since it is a P2SH
txin.script_sig = Script(
[sig, p2pkh_pk.to_hex(),
redeem_script.to_hex()])
# display the raw signed transaction, ready to be broadcasted
signed_tx = tx.serialize()
print("\nRaw signed transaction:\n" + signed_tx)
# display the raw unsigned transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# display the transaction id
print("\nTxId:", tx.get_txid())
# verify that the transaction is valid and will be accepted by the Bitcoin nodes
# if the transaction is valid, send it to the blockchain
is_valid = proxy.testmempoolaccept([signed_tx])
# print(is_valid)
if is_valid[0]['allowed']:
print("Transaction is valid!")
print("Sending transaction to blockchain..")
proxy.sendrawtransaction(signed_tx)
else:
print("Transaction not valid")
quit()
# 14. Add a small fee. A few satoshis is fine.
fee = 0.0001
amount = Decimal(btc_to_send) - Decimal(fee)
print("Amount:", amount)
txout = TxOutput(amount, to_address.to_script_pub_key())
# 15. Create the transaction using the input and output.
tx = Transaction([txin], [txout])
# 16. Sign the input.
sig = priv.sign_input(tx, 0, redeem_script)
# 17. Create the signature.
txin.script_sig = Script([sig, pub.to_hex(), redeem_script.to_hex()])
signed_tx = tx.serialize()
print("\nTxId:", tx.get_txid())
# 18. Print the raw transaction.
tx.get_txid()
tx.get_size()
tx
tx.has_segwit
# 19. Submit the transaction to the blockchain. What happens?
get_connection()
proxy.getrawmempool()
def main():
# always remember to setup the network
setup('testnet')
#
# This script creates a P2SH address containing a P2PK script and sends
# some funds to it
#
#
# create transaction output using P2SH scriptPubKey (locking script)
# (the recipient will give us the final address but for now we create it
# for demonstration purposes)
#
# secret key corresponding to the pubkey needed for the P2SH (P2PK) transaction
p2pk_sk = PrivateKey(
'cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
p2pk_pk = p2pk_sk.get_public_key().to_hex()
redeem_script = Script([p2pk_pk, 'OP_CHECKSIG'])
#TESTE_SUZANA
addressObj = P2shAddress.from_script(redeem_script)
print("addressObj=" + addressObj.to_address())
#TESTE_SUZANA
# you can initially spend a specific UTXO that you know (e.g. with the txid after you send some funds to the address). Then if everything works you can use the address to find all tx in that address and spend them. Make sure the timelock works and that you can spend the funds as expected.
# The 2nd program should display the raw signed transaction that is to be sent to a bitcoin node plus _send_ the transaction to a node. The last part is not possible with the bitcoin-utils library since I have not impl. a node proxy yet. So you have to use another lib or finish with the cli commands (commented out of course) that I have to run in order to send the raw tx to a bitcoin node.
# The P2SH addr could be recalculated in 2nd program since we have the redeem script! Providing the P2SH addr saves you from this small calculation and 'connects' the 2 programs :-)
# Re fees, I would rather you calculate the 'appropriate' fee and explain in comments how/why you did it this way. Ideally, you would consult an online service to get an estimate of the appropriate fee. This is minor for assignment purposes but major for production systems.
#https://bitcoin.stackexchange.com/questions/83650/how-does-nsequence-check-sequence-verify-work
#The 2nd program requires a private key as well... that is what unlock the funds.
##### NAO PRECISA PARA O ASSIGNMENT DAQUI EM DIANTE #######
# create transaction input from tx id of UTXO (contained 0.1 tBTC)
txin = TxInput(
'76464c2b9e2af4d63ef38a77964b3b77e629dddefc5cb9eb1a3645b1608b790f', 0)
# address we are spending from
from_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
# secret key of address that we are trying to spent
sk = PrivateKey('cTALNpTpRbbxTCJ2A5Vq88UxT44w1PE2cYqiB3n4hRvzyCev1Wwo')
#SUZANA ---- ASSINA COM P2SH do SCRIPT
txout = TxOutput(0.09, redeem_script.to_p2sh_script_pub_key())
# no change address - the remaining 0.01 tBTC will go to miners)
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to create the signature for the txin
sig = sk.sign_input(tx, 0, from_addr.to_script_pub_key())
#print(sig)
# get public key as hex
pk = sk.get_public_key()
pk = pk.to_hex()
#print (pk)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
def main():
# always remember to setup the network
setup('testnet')
integer_expiry_time = 2000
# ex.: 2000 in big endian is 07d0. After little endian conversion become: d007. Including two zeros in the end: d00700
expiry_time_in_hex = integer_expiry_time.to_bytes(
((integer_expiry_time.bit_length() + 7) // 8),
byteorder='little').hex() + '00'
print("hex= " + expiry_time_in_hex)
# create transaction input from tx id of UTXO (contained 0.4 tBTC)
txin = TxInput(
'fb48f4e23bf6ddf606714141ac78c3e921c8c0bebeb7c8abb2c799e9ff96ce6c', 0)
# create transaction output using P2PKH scriptPubKey (locking script)
addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
txout = TxOutput(
0.1,
Script([
'OP_DUP', 'OP_HASH160',
addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
# create another output to get the change - remaining 0.01 is tx fees
# note that this time we used to_script_pub_key() to create the P2PKH
# script
change_addr = P2pkhAddress('mmYNBho9BWQB2dSniP1NJvnPoj5EVWw89w')
change_txout = TxOutput(0.29, change_addr.to_script_pub_key())
#change_txout = TxOutput(0.29, Script(['OP_DUP', 'OP_HASH160',
# change_addr.to_hash160(),
# 'OP_EQUALVERIFY', 'OP_CHECKSIG']))
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout, change_txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to sign the input
sk = PrivateKey('cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
# note that we pass the scriptPubkey as one of the inputs of sign_input
# because it is used to replace the scriptSig of the UTXO we are trying to
# spend when creating the transaction digest
from_addr = P2pkhAddress('myPAE9HwPeKHh8FjKwBNBaHnemApo3dw6e')
#testeSuzana----------------------------
pub = sk.get_public_key()
# compressed is the default
print("Public key:", pub.to_hex(compressed=True))
# get address from public key
address = pub.get_address()
# print the address and hash160 - default is compressed address
print("Address:", address.to_address())
print("Hash160:", address.to_hash160())
print("from_addr:", from_addr.to_hash160())
#testeSuzana -------------------------------------------------
sig = sk.sign_input(
tx, 0,
Script([
'OP_DUP', 'OP_HASH160',
from_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
#print(sig)
# get public key as hex
pk = sk.get_public_key()
pk = pk.to_hex()
#print (pk)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
def main():
# always remember to setup the network
setup('testnet')
# create transaction input from tx id of UTXO (contained 0.39 tBTC)
# 0.1 tBTC
txin = TxInput(
'76464c2b9e2af4d63ef38a77964b3b77e629dddefc5cb9eb1a3645b1608b790f', 0)
# 0.29 tBTC
txin2 = TxInput(
'76464c2b9e2af4d63ef38a77964b3b77e629dddefc5cb9eb1a3645b1608b790f', 1)
# create transaction output using P2PKH scriptPubKey (locking script)
addr = P2pkhAddress('myPAE9HwPeKHh8FjKwBNBaHnemApo3dw6e')
txout = TxOutput(
0.3,
Script([
'OP_DUP', 'OP_HASH160',
addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
# create another output to get the change - remaining 0.01 is tx fees
change_addr = P2pkhAddress('mmYNBho9BWQB2dSniP1NJvnPoj5EVWw89w')
change_txout = TxOutput(
0.08,
Script([
'OP_DUP', 'OP_HASH160',
change_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin, txin2], [txout, change_txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
#
# use the private keys corresponding to the addresses that contains the
# UTXOs we are trying to spend to create the signatures
#
sk = PrivateKey('cTALNpTpRbbxTCJ2A5Vq88UxT44w1PE2cYqiB3n4hRvzyCev1Wwo')
sk2 = PrivateKey('cVf3kGh6552jU2rLaKwXTKq5APHPoZqCP4GQzQirWGHFoHQ9rEVt')
# we could have derived the addresses from the secret keys
from_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
from_addr2 = P2pkhAddress('mmYNBho9BWQB2dSniP1NJvnPoj5EVWw89w')
# sign the first input
sig = sk.sign_input(
tx, 0,
Script([
'OP_DUP', 'OP_HASH160',
from_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]), SIGHASH_ALL | SIGHASH_ANYONECANPAY)
#print(sig)
# sign the second input
sig2 = sk2.sign_input(
tx, 1,
Script([
'OP_DUP', 'OP_HASH160',
from_addr2.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]), SIGHASH_SINGLE | SIGHASH_ANYONECANPAY)
#print(sig2)
# get public key as hex
pk = sk.get_public_key()
pk = pk.to_hex()
#print (pk)
# get public key as hex
pk2 = sk2.get_public_key()
pk2 = pk2.to_hex()
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
txin2.script_sig = Script([sig2, pk2])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
# Secret key of P2SH address
p2pkh_sk = PrivateKey(priv_key)
# Get the P2PKH public key
p2pkh_pk = p2pkh_sk.get_public_key().to_hex()
# Get the P2PKH address (from the public key)
p2pkh_addr = p2pkh_sk.get_public_key().get_address()
# Create the redeem script
redeem_script = Script([seq.for_script(), 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP',
'OP_DUP', 'OP_HASH160', p2pkh_addr.to_hash160(),
'OP_EQUALVERIFY', 'OP_CHECKSIG'])
# Signature
sign = p2pkh_sk.sign_input(p2sh_out_tx, 0, redeem_script)
# Unlock transaction's input using signature, P2SH public key and redeem_script
txin.script_sig = Script([sign, p2pkh_pk, redeem_script.to_hex()])
# ***** Display the raw signed transaction
# Print Raw Signed Transaction
r_s_t = p2sh_out_tx.serialize()
print('\nRaw Signed Transaction: %s' %r_s_t)
# *** Display the transaction ID
# Signed Transaction ID
r_s_t_id = p2sh_out_tx.get_txid()
