def test_example_6(self): tx_ins = [] prev_tx = bytes.fromhex( '0d6fe5213c0b3291f208cba8bfb59b7476dffacc4e5cb66f6eb20a080843a299') prev_index = 13 tx_ins.append(TxIn(prev_tx, prev_index, Script([]), 0xffffffff)) tx_outs = [] change_amount = int(0.33 * 100000000) change_h160 = decode_base58('mzx5YhAH9kNHtcN481u6WkjeHjYtVeKVh2') change_script = p2pkh_script(change_h160) tx_outs.append(TxOut(amount=change_amount, script_pubkey=change_script)) target_amount = int(0.1 * 100000000) target_h160 = decode_base58('mnrVtF8DWjMu839VW3rBfgYaAfKk8983Xf') target_script = p2pkh_script(target_h160) tx_outs.append(TxOut(amount=target_amount, script_pubkey=target_script)) transaction = Tx(1, tx_ins, tx_outs, 0, testnet=True) z = transaction.sig_hash(0) private_key = PrivateKey(secret=8675309) der = private_key.sign(z).der() sig = der + SIGHASH_ALL.to_bytes(1, 'big') sec = private_key.point.sec() transaction.tx_ins[0].script_sig = Script([sig, sec]) want = '010000000199a24308080ab26e6fb65c4eccfadf76749bb5bfa8cb08f291320b3c21e56f0d0d0000006b4830450221008ed46aa2cf12d6d81065bfabe903670165b538f65ee9a3385e6327d80c66d3b502203124f804410527497329ec4715e18558082d489b218677bd029e7fa306a72236012103935581e52c354cd2f484fe8ed83af7a3097005b2f9c60bff71d35bd795f54b67ffffffff02408af701000000001976a914d52ad7ca9b3d096a38e752c2018e6fbc40cdf26f88ac80969800000000001976a914507b27411ccf7f16f10297de6cef3f291623eddf88ac00000000' self.assertEqual(transaction.serialize().hex(), want)
def test_sign_input(self): private_key = PrivateKey(secret=8675309) tx_ins = [] prev_tx = unhexlify( '0025bc3c0fa8b7eb55b9437fdbd016870d18e0df0ace7bc9864efc38414147c8') tx_ins.append( TxIn( prev_tx=prev_tx, prev_index=0, script_sig=b'', sequence=0xffffffff, )) tx_ins[0]._value = 110000000 tx_ins[0]._script_pubkey = Script.parse( private_key.point.p2pkh_script()) tx_outs = [] h160 = Tx.get_address_data( 'mzx5YhAH9kNHtcN481u6WkjeHjYtVeKVh2')['h160'] tx_outs.append( TxOut(amount=int(0.99 * 100000000), script_pubkey=p2pkh_script(h160))) h160 = Tx.get_address_data( 'mnrVtF8DWjMu839VW3rBfgYaAfKk8983Xf')['h160'] tx_outs.append( TxOut(amount=int(0.1 * 100000000), script_pubkey=p2pkh_script(h160))) tx = Tx( version=1, tx_ins=tx_ins, tx_outs=tx_outs, locktime=0, testnet=True, ) self.assertTrue(tx.sign_input(0, private_key, SIGHASH_ALL))
def new_commitment_tx(node, current_channel, cost, secret_hash): remote_peer = current_channel.peer # Create input using the output from the funding tx tx_in = TxIn(bytes.fromhex(current_channel.funding_tx.id()), 0) # Create 3 outputs. 1 to nodeA and 1 to nodeB and 1 to an HTLC script script_1 = p2pkh_script(decode_base58(node.address)) tx_out_1 = TxOut(amount=current_channel.local_amt - cost, script_pubkey=script_1) script_2 = p2pkh_script(decode_base58(remote_peer.btc_addr.decode())) tx_out_2 = TxOut(amount=current_channel.remote_amt, script_pubkey=script_2) #script_3 HTLC script_3 = Script([ 99, 168, secret_hash, 136, 118, 169, hash160(remote_peer.public_key.sec()), 103, encode_varint(1000), 177, 117, 118, 169, hash160(node.public_key.sec()), 104, 136, 172 ]) tx_out_3 = TxOut(amount=cost, script_pubkey=script_3) # Construct the commitment tx object commitment_tx = Tx(1, [tx_in], [tx_out_1, tx_out_2, tx_out_3], 0, True) #sign it commitment_tx.tx_ins[0].script_sig = get_script_sig( commitment_tx, node.private_key) return commitment_tx
def transfer(self, amount, address): uTxs = [] total = 0 for (tx, i) in self.unspentOutputs(): total += tx.outputs[i].amount uTxs.append((tx, i)) if total >= amount: break else: raise ValueError( "Wallet dose not have enough spendable outputs for transfer.") txIns = [] for (tx, i) in uTxs: txIn = TxIn(tx.toHash(), i) txIn.setScriptSig( generateSignature(txIn.toBytes(), self.privateKey), self.publicKey) txIns.append(txIn) txOuts = [TxOut(amount, address)] change = total - amount if change > 0: txOuts.append(TxOut(change, self.address)) self.receiveTx(Tx(txIns, txOuts))
def test_example_1(self): tx_ins = [] prev_tx = bytes.fromhex( '8be2f69037de71e3bc856a6627ed3e222a7a2d0ce81daeeb54a3aea8db274149') prev_index = 4 tx_ins.append(TxIn(prev_tx, prev_index)) tx_outs = [] h160 = decode_base58('mzx5YhAH9kNHtcN481u6WkjeHjYtVeKVh2') tx_outs.append( TxOut( amount=int(0.38 * 100000000), script_pubkey=p2pkh_script(h160), )) h160 = decode_base58('mnrVtF8DWjMu839VW3rBfgYaAfKk8983Xf') tx_outs.append( TxOut( amount=int(0.1 * 100000000), script_pubkey=p2pkh_script(h160), )) tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=True) z = tx_obj.sig_hash(0) pk = PrivateKey(secret=8675309) der = pk.sign(z).der() sig = der + SIGHASH_ALL.to_bytes(1, 'big') sec = pk.point.sec() tx_obj.tx_ins[0].script_sig = Script([sig, sec]) want = '0100000001494127dba8aea354ebae1de80c2d7a2a223eed27666a85bce371de3790f6e28b040000006b483045022100fa3032607b50e8cb05bedc9d43f986f19dedc22e61320b9765061c5cd9c66946022072d514ef637988515bfa59a660596206de68f0ed4090d0a398e70f4d81370dfb012103935581e52c354cd2f484fe8ed83af7a3097005b2f9c60bff71d35bd795f54b67ffffffff0280d54302000000001976a914d52ad7ca9b3d096a38e752c2018e6fbc40cdf26f88ac80969800000000001976a914507b27411ccf7f16f10297de6cef3f291623eddf88ac00000000' self.assertEqual(tx_obj.serialize().hex(), want)
def test_exercise_4(self): prev_tx = bytes.fromhex( '75a1c4bc671f55f626dda1074c7725991e6f68b8fcefcfca7b64405ca3b45f1c') prev_index = 1 target_address = 'miKegze5FQNCnGw6PKyqUbYUeBa4x2hFeM' target_amount = 0.01 change_address = 'mzx5YhAH9kNHtcN481u6WkjeHjYtVeKVh2' change_amount = 0.009 secret = 8675309 priv = PrivateKey(secret=secret) tx_ins = [] tx_ins.append(TxIn(prev_tx, prev_index, Script([]), 0xffffffff)) tx_outs = [] h160 = decode_base58(target_address) script_pubkey = p2pkh_script(h160) target_satoshis = int(target_amount * 100000000) tx_outs.append(TxOut(target_satoshis, script_pubkey)) h160 = decode_base58(change_address) script_pubkey = p2pkh_script(h160) change_satoshis = int(change_amount * 100000000) tx_outs.append(TxOut(change_satoshis, script_pubkey)) tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=True) self.assertTrue(tx_obj.sign_input(0, priv)) self.assertTrue(tx_obj.verify()) want = '01000000011c5fb4a35c40647bcacfeffcb8686f1e9925774c07a1dd26f6551f67bcc4a175010000006b483045022100a08ebb92422b3599a2d2fcdaa11f8f807a66ccf33e7f4a9ff0a3c51f1b1ec5dd02205ed21dfede5925362b8d9833e908646c54be7ac6664e31650159e8f69b6ca539012103935581e52c354cd2f484fe8ed83af7a3097005b2f9c60bff71d35bd795f54b67ffffffff0240420f00000000001976a9141ec51b3654c1f1d0f4929d11a1f702937eaf50c888ac9fbb0d00000000001976a914d52ad7ca9b3d096a38e752c2018e6fbc40cdf26f88ac00000000' self.assertEqual(tx_obj.serialize().hex(), want)
def get_output_info(num_outputs, amount_available): tx_outs = [] amount = amount_available for i in range(num_outputs): target_address = input("Enter address of recipient: ") target_h160 = decode_base58(target_address) valid_amount = False target_amount = int(float(input("How much would you like to pay them (in tBTC)? ")) * sat_in_bit) while(valid_amount == False): if(target_amount > amount): print("Insufficient Funds") target_amount = int(float(input("How much would you like to pay them (in tBTC)? ")) * sat_in_bit) else: print("Sufficient Funds") valid_amount = True amount = amount - target_amount print(str(amount/sat_in_bit)+" tBTC remaining") if(target_address[0]=='2'): print("This recipient is a P2SH") target_script = p2sh_script(target_h160) tx_outs.append(TxOut(amount = target_amount, script_pubkey = target_script)) else: print("This recipient is a P2PKH") target_script = p2pkh_script(target_h160) tx_outs.append(TxOut(amount = target_amount, script_pubkey = target_script)) if(amount > 0): print("There is a remainder of "+str(amount/sat_in_bit)+" tBTC. Please fill in recipient details:") target_address = input("Enter address of recipient: ") target_h160 = decode_base58(target_address) target_amount = amount if(target_address[0]=='2'): print("This recipient is a P2SH") target_script = p2sh_script(target_h160) tx_outs.append(TxOut(amount = target_amount, script_pubkey = target_script)) else: print("This recipient is a P2PKH") target_script = p2pkh_script(target_h160) tx_outs.append(TxOut(amount = target_amount, script_pubkey = target_script)) return tx_outs
def test_exercise_5(self): prev_tx_1 = bytes.fromhex( '11d05ce707c1120248370d1cbf5561d22c4f83aeba0436792c82e0bd57fe2a2f') prev_index_1 = 1 prev_tx_2 = bytes.fromhex( '51f61f77bd061b9a0da60d4bedaaf1b1fad0c11e65fdc744797ee22d20b03d15') prev_index_2 = 1 target_address = 'mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv' target_amount = 0.0429 secret = 8675309 priv = PrivateKey(secret=secret) tx_ins = [] tx_ins.append(TxIn(prev_tx_1, prev_index_1, Script([]), 0xffffffff)) tx_ins.append(TxIn(prev_tx_2, prev_index_2, Script([]), 0xffffffff)) tx_outs = [] h160 = decode_base58(target_address) script_pubkey = p2pkh_script(h160) target_satoshis = int(target_amount * 100000000) tx_outs.append(TxOut(target_satoshis, script_pubkey)) tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=True) self.assertTrue(tx_obj.sign_input(0, priv)) self.assertTrue(tx_obj.sign_input(1, priv)) self.assertTrue(tx_obj.verify()) want = '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' self.assertEqual(tx_obj.serialize().hex(), want)
def test_exercise_4(self): last_block_hex = '000000000d65610b5af03d73ed67704713c9b734d87cf4b970d39a0416dd80f9' last_block = bytes.fromhex(last_block_hex) secret = little_endian_to_int( hash256(b'Jimmy Song Programming Blockchain')) private_key = PrivateKey(secret=secret) addr = private_key.point.address(testnet=True) h160 = decode_base58(addr) target_address = 'mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv' self.assertEqual(addr, target_address) filter_size = 30 filter_num_functions = 5 filter_tweak = 90210 # FILL THIS IN target_h160 = decode_base58(target_address) target_script = p2pkh_script(target_h160) fee = 5000 # fee in satoshis node = SimpleNode('tbtc.programmingblockchain.com', testnet=True, logging=False) bf = BloomFilter(filter_size, filter_num_functions, filter_tweak) bf.add(h160) node.handshake() node.send(b'filterload', bf.filterload()) getheaders_message = GetHeadersMessage(start_block=last_block) node.send(getheaders_message.command, getheaders_message.serialize()) headers_envelope = node.wait_for_commands([HeadersMessage.command]) stream = headers_envelope.stream() headers = HeadersMessage.parse(stream) get_data_message = GetDataMessage() for block in headers.blocks: self.assertTrue(block.check_pow()) if last_block is not None: self.assertEqual(block.prev_block, last_block) last_block = block.hash() get_data_message.add_data(FILTERED_BLOCK_DATA_TYPE, last_block) node.send(get_data_message.command, get_data_message.serialize()) prev_tx = None while prev_tx is None: envelope = node.wait_for_commands([b'merkleblock', b'tx']) stream = envelope.stream() if envelope.command == b'merkleblock': mb = MerkleBlock.parse(stream) self.assertTrue(mb.is_valid()) else: prev = Tx.parse(stream, testnet=True) for i, tx_out in enumerate(prev.tx_outs): if tx_out.script_pubkey.address(testnet=True) == addr: prev_tx = prev.hash() prev_index = i prev_amount = tx_out.amount break tx_in = TxIn(prev_tx, prev_index) output_amount = prev_amount - fee tx_out = TxOut(output_amount, target_script) tx_obj = Tx(1, [tx_in], [tx_out], 0, testnet=True) tx_obj.sign_input(0, private_key) self.assertEqual( tx_obj.serialize().hex(), '010000000194e631abb9e1079ec72a1616a3aa0111c614e65b96a6a4420e2cc6af9e6cc96e000000006a47304402203cc8c56abe1c0dd043afa9eb125dafbebdde2dd4cd7abf0fb1aae0667a22006e02203c95b74d0f0735bbf1b261d36e077515b6939fc088b9d7c1b7030a5e494596330121021cdd761c7eb1c90c0af0a5963e94bf0203176b4662778d32bd6d7ab5d8628b32ffffffff01f8829800000000001976a914ad346f8eb57dee9a37981716e498120ae80e44f788ac00000000' )
def add_channel(local_node, remote_peer, input_tx_id, input_tx_index): tx_in = TxIn(bytes.fromhex(input_tx_id), input_tx_index) local_amount = tx_in.value() remote_amount = 0 # Construct the output: amount, scriptPubKey = 2-of-2 Bare Multisig = Script([op_1, pubkey1, pubkey2, op_2, op_checkmultisig]) scriptPubKey = Script([ 0x52, local_node.public_key.sec(), remote_peer.public_key.sec(), 0x52, 0xae ]) tx_out = TxOut(amount=local_amount, script_pubkey=scriptPubKey) # Construct the transaction object funding_tx = Tx(1, [tx_in], [tx_out], 0, True) # Sign the input funding_tx.sign_input(0, local_node.private_key) #send channel request new_channel = Channel(remote_peer, local_amount, remote_amount, funding_tx) remote_peer.send(str.encode(new_channel.toJSON())) return new_channel
def test_exercise_6(self): last_block_hex = '000000000d65610b5af03d73ed67704713c9b734d87cf4b970d39a0416dd80f9' secret = little_endian_to_int( hash256(b'Jimmy Song Programming Blockchain')) private_key = PrivateKey(secret=secret) addr = private_key.point.address(testnet=True) h160 = decode_base58(addr) target_address = 'mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv' self.assertEqual(addr, target_address) target_h160 = decode_base58(target_address) target_script = p2pkh_script(target_h160) fee = 5000 node = SimpleNode('tbtc.programmingblockchain.com', testnet=True) bf = BloomFilter(30, 5, 90210) bf.add(h160) node.handshake() node.send(bf.filterload()) start_block = bytes.fromhex(last_block_hex) getheaders = GetHeadersMessage(start_block=start_block) node.send(getheaders) headers = node.wait_for(HeadersMessage) last_block = None getdata = GetDataMessage() for b in headers.blocks: if not b.check_pow(): raise RuntimeError('proof of work is invalid') if last_block is not None and b.prev_block != last_block: raise RuntimeError('chain broken') getdata.add_data(FILTERED_BLOCK_DATA_TYPE, b.hash()) last_block = b.hash() node.send(getdata) prev_tx, prev_index, prev_tx_obj = None, None, None while prev_tx is None: message = node.wait_for(MerkleBlock, Tx) if message.command == b'merkleblock': if not message.is_valid(): raise RuntimeError('invalid merkle proof') else: message.testnet = True for i, tx_out in enumerate(message.tx_outs): if tx_out.script_pubkey.address(testnet=True) == addr: prev_tx = message.hash() prev_index = i prev_amount = tx_out.amount self.assertEqual( message.id(), '6ec96c9eafc62c0e42a4a6965be614c61101aaa316162ac79e07e1b9ab31e694' ) self.assertEqual(i, 0) break tx_in = TxIn(prev_tx, prev_index) output_amount = prev_amount - fee tx_out = TxOut(output_amount, target_script) tx_obj = Tx(1, [tx_in], [tx_out], 0, testnet=True) tx_obj.sign_input(0, private_key) self.assertEqual( tx_obj.serialize().hex(), '010000000194e631abb9e1079ec72a1616a3aa0111c614e65b96a6a4420e2cc6af9e6cc96e000000006a47304402203cc8c56abe1c0dd043afa9eb125dafbebdde2dd4cd7abf0fb1aae0667a22006e02203c95b74d0f0735bbf1b261d36e077515b6939fc088b9d7c1b7030a5e494596330121021cdd761c7eb1c90c0af0a5963e94bf0203176b4662778d32bd6d7ab5d8628b32ffffffff01f8829800000000001976a914ad346f8eb57dee9a37981716e498120ae80e44f788ac00000000' )
def test_example_5(self): tx_ins = [] prev_tx = bytes.fromhex('0d6fe5213c0b3291f208cba8bfb59b7476dffacc4e5cb66f6eb20a080843a299') prev_index = 13 tx_ins.append(TxIn(prev_tx, prev_index, Script([]), 0xffffffff)) tx_outs = [] change_amount = int(0.33 * 100000000) change_h160 = decode_base58('mzx5YhAH9kNHtcN481u6WkjeHjYtVeKVh2') change_script = p2pkh_script(change_h160) tx_outs.append(TxOut(change_amount, change_script)) target_amount = int(0.1 * 100000000) target_h160 = decode_base58('mnrVtF8DWjMu839VW3rBfgYaAfKk8983Xf') target_script = p2pkh_script(target_h160) tx_outs.append(TxOut(target_amount, target_script)) transaction = Tx(1, tx_ins, tx_outs, 0, testnet=True) want = '010000000199a24308080ab26e6fb65c4eccfadf76749bb5bfa8cb08f291320b3c21e56f0d0d00000000ffffffff02408af701000000001976a914d52ad7ca9b3d096a38e752c2018e6fbc40cdf26f88ac80969800000000001976a914507b27411ccf7f16f10297de6cef3f291623eddf88ac00000000' self.assertEqual(transaction.serialize().hex(), want)
def buildoutputs(pubkeysarr, amountsarr): tx_outs = [] for i in range(len(pubkeysarr)): if amountsarr[i] != 0: tx_outs.append( TxOut( amount=int(amountsarr[i]), script_pubkey=p2pkh_script(decode_base58(pubkeysarr[i])), )) return tx_outs
def send(self, adddress, amount, fee=500): # collect inputs unspent = self.unspent() tx_ins = [] input_sum = 0 for utxo in unspent: if input_sum >= amount + fee: break input_sum += utxo.amount tx_in = TxIn(utxo.tx_id, utxo.index) tx_ins.append(tx_in) # make sure we have enough assert input_sum > amount + fee, 'not enough satoshis' # send output send_h160 = decode_base58(address) send_script = p2pkh_script(send_h160) send_output = TxOut(amount=amount, script_pubkey=send_script) # change output change_amount = input_sum - amount - fee change_h160 = decode_base58(self.address()) change_script = p2pkh_script(change_h160) change_output = TxOut(amount=amount, script_pubkey=change_script) # construct tx = Tx(1, tx_ins, [send_output, change_output], 0, True) # sign for i in range(len(tx_ins)): utxo = unspent[i] assert tx.sign_input(i, self.private_key, utxo.script_pubkey) print(f'signed {i}') print(tx) # broadcast import bit tx_hex = tx.serialize().hex() print(tx_hex) # raises a ConnectionError if it fails print(bit.network.NetworkAPI.broadcast_tx_testnet(tx_hex))
def simple_send(self, address, amount, satoshi_per_byte=1): if amount > self.balance(): raise RuntimeError( 'Balance is less than how much you want to send') input_total = 0 tx_ins = [] paths = [] # gather inputs using our utxos for utxo in self.utxo_lookup.values(): input_total += utxo.txo.amount tx_ins.append(TxIn(utxo.txo.tx_id, utxo.txo.tx_index)) paths.append(utxo.txo.path) if input_total > amount: break # target output tx_outs = [TxOut(amount, address_to_script_pubkey(address))] tx_outs_size = len(tx_outs[0].serialize()) # calculate how much fees should be at this point # our utxos are always bech32, so each input is 32+4+1+4 = 41 bytes # our change outputs are bech32, so each output is 8+23 = 31 bytes # the witness will be 33 + 72 bytes per input but count 1/4 tx_size = 4 + 1 + len(tx_ins) * 41 + 1 + tx_outs_size + 31 + len( tx_ins) * (2 + 33 + 72) fee = tx_size * satoshi_per_byte if input_total < fee + amount: raise RuntimeError('Balance does not cover fees') # change output change_amount = input_total - amount - fee # don't bother if we're creating dust if change_amount > 200: tx_outs.append(TxOut(change_amount, self.change_script_pubkey())) # create transaction and sign tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=self.testnet, segwit=True) # signing the transaction self.encrypted_private.sign(tx_obj, paths) LOGGER.info('sending the transaction') return self.node.send_tx(tx_obj)
def test_exercise_3_1(self): prev_tx = bytes.fromhex( 'eb581753a4dbd6befeaaaa28a6f4576698ba13a07c03da693a65bce11cf9887a') prev_index = 1 target_address = 'mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv' target_amount = 0.04 change_address = 'mzx5YhAH9kNHtcN481u6WkjeHjYtVeKVh2' fee = 50000 secret = 8675309 private_key = PrivateKey(secret=secret) tx_ins = [] tx_ins.append(TxIn(prev_tx, prev_index)) tx_outs = [] h160 = decode_base58(target_address) script_pubkey = p2pkh_script(h160) target_satoshis = int(target_amount * 100000000) tx_outs.append(TxOut(target_satoshis, script_pubkey)) h160 = decode_base58(change_address) script_pubkey = p2pkh_script(h160) prev_amount = tx_ins[0].value(testnet=True) change_satoshis = prev_amount - target_satoshis - fee tx_outs.append(TxOut(change_satoshis, script_pubkey)) tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=True) tx_obj.sign_input(0, private_key) if private_key.point.address(testnet=True) != change_address: raise RuntimeError( 'Private Key does not correspond to Change Address, check priv_key and change_address' ) if tx_ins[0].script_pubkey( testnet=True).instructions[2] != decode_base58(change_address): raise RuntimeError( 'Output is not something you can spend with this private key. Check that the prev_tx and prev_index are correct' ) if tx_obj.fee() > 0.05 * 100000000 or tx_obj.fee() <= 0: raise RuntimeError( 'Check that the change amount is reasonable. Fee is {}'.format( tx_obj.fee())) self.assertEqual( tx_obj.serialize().hex(), '01000000017a88f91ce1bc653a69da037ca013ba986657f4a628aaaafebed6dba4531758eb010000006a47304402204ce6e3877ed2e18d2165276cbdba241507ce72b44d8df640eb6cb4d415eaaea002207dffd162da35593d86188ce87a1cbc9d3a5b26391870f19bf1764ca05b315ad9012103935581e52c354cd2f484fe8ed83af7a3097005b2f9c60bff71d35bd795f54b67ffffffff0200093d00000000001976a914ad346f8eb57dee9a37981716e498120ae80e44f788ac7077e401000000001976a914d52ad7ca9b3d096a38e752c2018e6fbc40cdf26f88ac00000000' )
def parse(cls, s, testnet=False): version = little_endian_to_int(s.read(4)) num_inputs = read_varint(s) inputs = [] for _ in range(num_inputs): inputs.append(TxIn.parse(s)) num_outputs = read_varint(s) outputs = [] for _ in range(num_outputs): outputs.append(TxOut.parse(s)) locktime = little_endian_to_int(s.read(4)) return cls(version, inputs, outputs, locktime, testnet=testnet)
def check_htlc(node, commitment_tx, secret): tx_in = TxIn(bytes.fromhex(commitment_tx.id()), 2) tx_out = TxOut(amount=commitment_tx.tx_outs[2].amount, script_pubkey=commitment_tx.tx_outs[0].script_pubkey) spendingTx = Tx(1, [tx_in], [tx_out], 0, True) z = spendingTx.sig_hash(0) signature = node.private_key.sign(z).der() + SIGHASH_ALL.to_bytes(1, 'big') combined = Script( [signature, node.public_key.sec(), str.encode(secret), b'1']) + commitment_tx.tx_outs[2].script_pubkey return combined.evaluate(z, None)
def parse_tx(cls, s): '''Takes a byte stream and parses the transaction at the start return a Tx object ''' version = little_endian_to_int(s.read(4)) num_inputs = read_varint(s) inputs = [] for _ in range(num_inputs): inputs.append(TxIn.parse(s)) num_outputs = read_varint(s) outputs = [] for _ in range(num_outputs): outputs.append(TxOut.parse(s)) locktime = little_endian_to_int(s.read(4)) return cls(version, inputs, outputs, locktime)
def test_sign(self, gp): gp.return_value = 'password' mnemonic = 'method wire potato cotton fame can repair mother elder festival hurry trophy' enc = EncryptedPrivateKey.from_mnemonic(mnemonic, testnet=True) path = "m/84'/1'/0'/0/0" hd_priv = enc.get_private_key().traverse(path) tx_id = bytes.fromhex('07affe8b0ef5f009eef5399c20586b3181103564e8ffe444631dcae20389738c') tx_index = 0 amount = 12753130 tx_in = TxIn(tx_id, tx_index) tx_out = TxOut(amount - 5000, hd_priv.p2wpkh_script()) tx_obj = Tx(1, [tx_in], [tx_out], 0, testnet=True, segwit=True) self.assertTrue(tx_obj.sign_p2wpkh(0, hd_priv.private_key)) want = '010000000001018c738903e2ca1d6344e4ffe864351081316b58209c39f5ee09f0f50e8bfeaf070000000000ffffffff016285c200000000001600145b3a0784c7674df3645541a39f1d0061fafd121302483045022100ed55340424848ac402279a703440c3e64234cda15693b155e23daddea8e3ea75022018af9c2df35393e168980b835d1c08318e5417647522fb3c71c936fa20a416ae012102221f70f0e3f9cb3e164a45e7994e6e83816c76dc122d0987e4559536b888530b00000000' self.assertEqual(want, tx_obj.serialize().hex())
def __init__(self, inputs, outputs, version=1, input_sequence=0xffffffff, locktime=0, segwit=False): """ - inputs: list of tuples (prev-tx, vout) or TxIns - outputs: list of tuples (amount, script_pubkey) or TxOuts """ self.role = "Creator" self.inputs = [] self.outputs = [] if type(inputs[0]) != TxIn: for i in inputs: self.inputs.append(TxIn(prev_tx=i[0], prev_index=i[1], script_sig=None, sequence=input_sequence)) if type(outputs[0]) != TxOut: for o in outputs: #print(type(o[0]), type(0[1])) self.outputs.append(TxOut(amount=o[0], script_pubkey=o[1])) self.tx_obj = Tx(version=version, tx_ins=self.inputs, tx_outs=self.outputs, locktime=locktime, segwit=segwit) serialized_tx = self.tx_obj.serialize() ser_psbt = MAGIC + HEAD_SEPARATOR + PSBT.serialize_pair(key=GLOBAL_UNSIGNED_TX, value=serialized_tx) ser_psbt += DATA_SEPARATOR + (DATA_SEPARATOR*len(self.inputs)) + (DATA_SEPARATOR*len(self.outputs)) self.psbt = PSBT.parse(BytesIO(ser_psbt))
def test_b2x_sign(self): # Generated from ./bitcoin2x-qt -regtest wif = 'cVC6z7gnezHZut5yyuCX3x79tfcbauCWiFcBY92Vg4crfu4Maa5B' prev_tx = 'b6d073333c1a8e4360b1e2c7fa2ed6b67b74272ad7fabf52a4e4732df5f47dbd' prev_index = 0 prev_value = 5000000000 destination = 'mrVqpGm7F5MVCwsP4s3fQEN2GAaykJoTu4' amount = 4996000000 priv_key = PrivateKey.parse(wif) prev_script_pubkey = B2XTx.get_address_data( priv_key.point.address())['script_pubkey'].serialize() tx_in = TxIn(unhexlify(prev_tx), prev_index, b'', 0xffffffff, b'\x00', prev_value, prev_script_pubkey) script = B2XTx.get_address_data( destination)['script_pubkey'].serialize() tx_out = TxOut(amount, script) tx = B2XTx(2, [tx_in], [tx_out], 0, testnet=True) tx.sign(priv_key) want = "0200000001bd7df4f52d73e4a452bffad72a27747bb6d62efac7e2b160438e1a3c3373d0b6000000006a47304402201df7c8c97443bd46da751e0051a4395ba3613be3604be97d3c801c21e3d23c79022012ad30b7ffd42ad7bb96f9157519f7e3c35409ed54f783a3c854a596343a6c713121030f96812693c4a50162134cfa307afb63580171963d6c4198e8e5cfeee2c92b60ffffffff0100e9c829010000001976a91478738f2c5a75397eb2f851597261f766a67d9b6388ac00000000" self.assertTrue(tx.verify()) self.assertEqual(tx.serialize().hex(), want)
def test_exercise_3_2(self): prev_tx_1 = bytes.fromhex( '89cbfe2eddaddf1eb11f5c4adf6adaa9bca4adc01b2a3d03f8dd36125c068af4') prev_index_1 = 0 prev_tx_2 = bytes.fromhex( '19069e1304d95f70e03311d9d58ee821e0978e83ecfc47a30af7cd10fca55cf4') prev_index_2 = 0 target_address = 'mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv' fee = 50000 secret = 61740721216174072121 private_key = PrivateKey(secret=secret) tx_ins = [] tx_ins.append(TxIn(prev_tx_1, prev_index_1)) tx_ins.append(TxIn(prev_tx_2, prev_index_2)) tx_outs = [] h160 = decode_base58(target_address) script_pubkey = p2pkh_script(h160) target_satoshis = tx_ins[0].value(True) + tx_ins[1].value(True) - fee tx_outs.append(TxOut(target_satoshis, script_pubkey)) tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=True) tx_obj.sign_input(0, private_key) tx_obj.sign_input(1, private_key) if tx_ins[0].script_pubkey( testnet=True).instructions[2] != decode_base58( private_key.point.address(testnet=True)): raise RuntimeError( 'Output is not something you can spend with this private key. Check that the prev_tx and prev_index are correct' ) if tx_obj.fee() > 0.05 * 100000000 or tx_obj.fee() <= 0: raise RuntimeError( 'Check that the change amount is reasonable. Fee is {}'.format( tx_obj.fee())) self.assertEqual( tx_obj.serialize().hex(), '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' )
assert all(p == pk.point for p,pk in key_pairs) pubkeys = [p for p, _ in key_pairs] OP_n = lambda n: 0x51 + n - 1 n_required = 2 elements = [OP_n(n_required)] + [pk.sec(compressed=False) for pk in pubkeys] + [OP_n(len(pubkeys))] + [174] redeemScript = script.Script(elements) address=helper.h160_to_p2sh_address(helper.hash160(redeemScript.serialize()), testnet=False) redeemScript=hexlify(redeemScript.serialize()) assert address=="3QJmV3qfvL9SuYo34YihAf3sRCW3qSinyC" assert redeemScript=="52410491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f864104865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec687441048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d4621353ae".encode('ascii') print(hexlify(helper.hash160(unhexlify(redeemScript)))) prev_tx = 'd6f72aab8ff86ff6289842a0424319bf2ddba85dc7c52757912297f948286389' prev_index = 0 tx_in = TxIn(unhexlify(prev_tx), prev_index, b'') h160 = helper.decode_base58_checksum(address)[1:] tx_out = TxOut(int(0.01*100e6), script_pubkey=helper.p2sh_script(h160)) t = Tx(version=1, tx_ins=[tx_in], tx_outs=[tx_out], locktime=0, testnet=False) raw_transaction = hexlify(t.serialize()) assert raw_transaction == "010000000189632848f99722915727c5c75da8db2dbf194342a0429828f66ff88fab2af7d60000000000ffffffff0140420f000000000017a914f815b036d9bbbce5e9f2a00abd1bf3dc91e955108700000000".encode('ascii') print(t) #tx.sign_input(input_index=0, private_key='', hash_type=helper.SIGHASH_ALL)
def construct_tx_out(address, amount): h160 = decode_base58(address) script = p2pkh_script(h160) return TxOut(amount=amount, script_pubkey=script)
prev_tx = bytes.fromhex( "63fdb36b4ca0140ad343687ad8947a9d3adf9820383aefd9ae4d4c3521dde7dc") prev_index = 1 target_address = "mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv" target_amount = 0.01 change_address = "myxBsPLTwYQXJXbeausiiTHBXodDcX27mR" change_amount = 0.009 passphrase = b'pickmeupimscared1419' secret = little_endian_to_int(hash256(passphrase)) priv = PrivateKey(secret) tx_ins = [] tx_ins.append(TxIn(prev_tx, prev_index)) tx_outs = [] h160 = decode_base58(target_address) script_pubkey = p2pkh_script(h160) target_satoshis = int(target_amount * 100_000_000) tx_outs.append(TxOut(target_satoshis, script_pubkey)) h160 = decode_base58(change_address) script_pubkey = p2pkh_script(h160) change_satoshis = int(change_amount * 100_000_000) tx_outs.append(TxOut(change_satoshis, script_pubkey)) tx_obj = Tx(1, tx_ins, tx_outs, 0, testnet=True) print(tx_obj.sign_input(0, priv)) print(tx_obj.serialize().hex())
prev_tx = bytes.fromhex( '1ed5583812bda08b71a71c2fa1e6788dac956efa9d2c26b6c9fd10f6e885658f') prev_index = 1 # create the txin with the output of the UTXO we have been given tx_in = TxIn(prev_tx, prev_index) tx_outs = [] change_amount = int(0.00003 * 100000000) # output address that will receive the sat we have not spend change_h160 = decode_base58('mvEg6eZ3sUApodedYQrkpEPMMALsr1K1k1') change_script = p2pkh_script(change_h160) change_output = TxOut(amount=change_amount, script_pubkey=change_script) # output address that will receive our sat target_amount = int(0.00006 * 100000000) target_h160 = decode_base58('mwJn1YPMq7y5F8J3LkC5Hxg9PHyZ5K4cFv') target_script = p2pkh_script(target_h160) target_output = TxOut(amount=target_amount, script_pubkey=target_script) tx_obj = Tx(1, [tx_in], [change_output, target_output], 0, True) #print(tx_obj).hex() # now we sign the transaction z = tx_obj.sig_hash(0) private_key = PrivateKey(little_endian_to_int(
output_address = pay_private_key.point.address(testnet=True) # out1_address resulting from the above pay_secret # out1_address = 'mgbxvp8L3o5zbw8P81VWVv42gUj9eZNjAN' change_secret = 9883161471906162552674337436001522581212416354973578695250248738884382136882 #secret = random.getrandbits(256) change_private_key = PrivateKey(change_secret) change_address = change_private_key.point.address(testnet=True) paying_amount = prev_tx_obj.tx_outs[0].amount paid_amount = math.floor(paying_amount * .1) fee = math.floor(paid_amount * .1) change_amount = paying_amount - paid_amount - fee paid_script = p2pkh_script(decode_base58(output_address)) change_script = p2pkh_script(decode_base58(change_address)) tx_out_paid = TxOut(paid_amount, paid_script) tx_out_change = TxOut(change_amount, change_script) tx = Tx(1, [txi], [tx_out_paid, tx_out_change], 0, True) print(tx) print(tx.sign_input(input_index=0, private_key=input_private_key)) print(tx) print("tx_in script...") print(tx.tx_ins[0].script_sig) print(tx.serialize().hex())
prev_tx = bytes.fromhex( '5419d7e0538c78f8de8d9e0bc020ec94fab386b82a5229b690be87b5f669f3f6') prev_index = 0 # create the txin with the output of the UTXO we have been given tx_in = TxIn(prev_tx, prev_index) tx_outs = [] # output address that will receive the sat we have not spend change_amount = int(0.00003 * 100000000) change_h160 = decode_base58('mvEg6eZ3sUApodedYQrkpEPMMALsr1K1k1') change_script = p2pkh_script(change_h160) change_output = TxOut(amount=change_amount, script_pubkey=change_script) # output address that will receive our sat target_amount = int(0.00010 * 100000000) target_h160 = decode_base58('2N7e6ZAGXoepdVYu2Y8ho7fTf6oxE3j9UwS') target_script = p2pkh_script(target_h160) target_output = TxOut(amount=target_amount, script_pubkey=dat_redeem_script_op) tx_obj = Tx(1, [tx_in], [change_output, target_output], 0, True) #print(tx_obj).hex() # now we sign the transaction z = tx_obj.sig_hash(0) private_key = PrivateKey(little_endian_to_int(
'b685879f3939fa9531899b729394ed85edab8b6850b72a9e378ea31af96a304a') index_tx_previa = 1 tx_inputs = [] tx_inputs.append(TxIn(tx_previa, index_tx_previa)) #OUPUTS tx_outputs = [] destinatario = 'mv4rnyY3Su5gjcDNzbMLKBQkBicCtHUtFB' monto = .00008 change_adress = ADDRESS cambio = .00001 #SEND OUTPUT h160 = decode_base58(destinatario) script_pubkey = p2pkh_script(h160) monto_satoshis = int(monto * 100_000_000) tx_outputs.append(TxOut(monto_satoshis, script_pubkey)) #CHANGE OUPUT h160 = decode_base58(change_adress) script_pubkey = p2pkh_script(h160) cambio_satoshis = int(cambio * 100_000_000) tx_outputs.append(TxOut(cambio_satoshis, script_pubkey)) #TX BUILD TX_BUILD = Tx(1, tx_inputs, tx_outputs, 0, testnet=True) #SIGN print(TX_BUILD.sign_input(0, PrivKey)) print(TX_BUILD.serialize().hex())