def initialise_rawtransactions_db(db): """Drop old raw transaction table, create new one and populate it from unspent_outputs.json.""" if pytest.config.option.savescenarios: server.initialise(database_file=':memory:', testnet=True, **SCHPARTYD_OPTIONS) cursor = db.cursor() cursor.execute('DROP TABLE IF EXISTS raw_transactions') cursor.execute('CREATE TABLE IF NOT EXISTS raw_transactions(tx_hash TEXT UNIQUE, tx_hex TEXT)') with open(CURR_DIR + '/fixtures/unspent_outputs.json', 'r') as listunspent_test_file: wallet_unspent = json.load(listunspent_test_file) for output in wallet_unspent: txid = binascii.hexlify(SatoshiChainlib.core.lx(output['txid'])).decode() tx = backend.deserialize(output['txhex']) cursor.execute('INSERT INTO raw_transactions VALUES (?, ?)', (txid, output['txhex'])) cursor.close()
def get_tx_info2(tx_hex, block_parser=None): """Get multisig transaction info. The destinations, if they exists, always comes before the data output; the change, if it exists, always comes after. """ # Decode transaction binary. ctx = backend.deserialize(tx_hex) def arc4_decrypt(cyphertext): '''Un‐obfuscate. Initialise key once per attempt.''' key = ARC4.new(ctx.vin[0].prevout.hash[::-1]) return key.decrypt(cyphertext) def get_opreturn(asm): if len(asm) == 2 and asm[0] == 'OP_RETURN': pubkeyhash = asm[1] if type(pubkeyhash) == bytes: return pubkeyhash raise DecodeError('invalid OP_RETURN') def decode_opreturn(asm): chunk = get_opreturn(asm) chunk = arc4_decrypt(chunk) if chunk[:len(config.PREFIX)] == config.PREFIX: # Data destination, data = None, chunk[len(config.PREFIX):] else: raise DecodeError('unrecognised OP_RETURN output') return destination, data def decode_checksig(asm): pubkeyhash = script.get_checksig(asm) chunk = arc4_decrypt(pubkeyhash) if chunk[1:len(config.PREFIX) + 1] == config.PREFIX: # Data # Padding byte in each output (instead of just in the last one) so that encoding methods may be mixed. Also, it’s just not very much data. chunk_length = chunk[0] chunk = chunk[1:chunk_length + 1] destination, data = None, chunk[len(config.PREFIX):] else: # Destination pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8') destination, data = script.base58_check_encode(pubkeyhash, config.ADDRESSVERSION), None return destination, data def decode_checkmultisig(asm): pubkeys, signatures_required = script.get_checkmultisig(asm) chunk = b'' for pubkey in pubkeys[:-1]: # (No data in last pubkey.) chunk += pubkey[1:-1] # Skip sign byte and nonce byte. chunk = arc4_decrypt(chunk) if chunk[1:len(config.PREFIX) + 1] == config.PREFIX: # Data # Padding byte in each output (instead of just in the last one) so that encoding methods may be mixed. Also, it’s just not very much data. chunk_length = chunk[0] chunk = chunk[1:chunk_length + 1] destination, data = None, chunk[len(config.PREFIX):] else: # Destination pubkeyhashes = [script.pubkey_to_pubkeyhash(pubkey) for pubkey in pubkeys] destination, data = script.construct_array(signatures_required, pubkeyhashes, len(pubkeyhashes)), None return destination, data # Ignore coinbase transactions. if ctx.is_coinbase(): raise DecodeError('coinbase transaction') # Get destinations and data outputs. destinations, shell_amount, fee, data = [], 0, 0, b'' for vout in ctx.vout: # Fee is the input values minus output values. output_value = vout.nValue fee -= output_value # Ignore transactions with invalid script. try: asm = script.get_asm(vout.scriptPubKey) except CScriptInvalidError as e: raise DecodeError(e) if asm[0] == 'OP_RETURN': new_destination, new_data = decode_opreturn(asm) elif asm[-1] == 'OP_CHECKSIG': new_destination, new_data = decode_checksig(asm) elif asm[-1] == 'OP_CHECKMULTISIG': new_destination, new_data = decode_checkmultisig(asm) else: raise DecodeError('unrecognised output type') assert not (new_destination and new_data) assert new_destination != None or new_data != None # `decode_*()` should never return `None, None`. if util.enabled('null_data_check'): if new_data == []: raise DecodeError('new destination is `None`') # All destinations come before all data. if not data and not new_data and destinations != [config.UNSPENDABLE,]: destinations.append(new_destination) shell_amount += output_value else: if new_destination: # Change. break else: # Data. data += new_data # Only look for source if data were found or destination is `UNSPENDABLE`, # for speed. if not data and destinations != [config.UNSPENDABLE,]: raise SCHOnlyError('no data and not unspendable') # Collect all (unique) source addresses. sources = [] for vin in ctx.vin[:]: # Loop through inputs. # Get the full transaction data for this input transaction. if block_parser: vin_tx = block_parser.read_raw_transaction(ib2h(vin.prevout.hash)) vin_ctx = backend.deserialize(vin_tx['__data__']) else: vin_tx = backend.getrawtransaction(ib2h(vin.prevout.hash)) vin_ctx = backend.deserialize(vin_tx) vout = vin_ctx.vout[vin.prevout.n] fee += vout.nValue asm = script.get_asm(vout.scriptPubKey) if asm[-1] == 'OP_CHECKSIG': new_source, new_data = decode_checksig(asm) if new_data or not new_source: raise DecodeError('data in source') elif asm[-1] == 'OP_CHECKMULTISIG': new_source, new_data = decode_checkmultisig(asm) if new_data or not new_source: raise DecodeError('data in source') else: raise DecodeError('unrecognised source type') # Collect unique sources. if new_source not in sources: sources.append(new_source) sources = '-'.join(sources) destinations = '-'.join(destinations) return sources, destinations, shell_amount, round(fee), data
def get_tx_info1(tx_hex, block_index, block_parser=None): """Get singlesig transaction info. The destination, if it exists, always comes before the data output; the change, if it exists, always comes after. """ ctx = backend.deserialize(tx_hex) def get_pubkeyhash(scriptpubkey): asm = script.get_asm(scriptpubkey) if len(asm) != 5 or asm[0] != 'OP_DUP' or asm[1] != 'OP_HASH160' or asm[3] != 'OP_EQUALVERIFY' or asm[4] != 'OP_CHECKSIG': return False return asm[2] def get_address(scriptpubkey): pubkeyhash = get_pubkeyhash(scriptpubkey) if not pubkeyhash: return False pubkeyhash = binascii.hexlify(pubkeyhash).decode('utf-8') address = script.base58_check_encode(pubkeyhash, config.ADDRESSVERSION) # Test decoding of address. if address != config.UNSPENDABLE and binascii.unhexlify(bytes(pubkeyhash, 'utf-8')) != script.base58_check_decode(address, config.ADDRESSVERSION): return False return address # Fee is the input values minus output values. fee = 0 # Get destination output and data output. destination, shell_amount, data = None, None, b'' pubkeyhash_encoding = False for vout in ctx.vout: fee -= vout.nValue # Sum data chunks to get data. (Can mix OP_RETURN and multi-sig.) asm = script.get_asm(vout.scriptPubKey) if len(asm) == 2 and asm[0] == 'OP_RETURN': # OP_RETURN if type(asm[1]) != bytes: continue data_chunk = asm[1] data += data_chunk elif len(asm) == 5 and asm[0] == 1 and asm[3] == 2 and asm[4] == 'OP_CHECKMULTISIG': # Multi-sig if type(asm[2]) != bytes: continue data_pubkey = asm[2] data_chunk_length = data_pubkey[0] # No ord() necessary. data_chunk = data_pubkey[1:data_chunk_length + 1] data += data_chunk elif len(asm) == 5 and (block_index >= 293000 or config.TESTNET): # Protocol change. # Be strict. pubkeyhash = get_pubkeyhash(vout.scriptPubKey) if not pubkeyhash: continue if ctx.is_coinbase(): raise DecodeError('coinbase transaction') obj1 = ARC4.new(ctx.vin[0].prevout.hash[::-1]) data_pubkey = obj1.decrypt(pubkeyhash) if data_pubkey[1:9] == config.PREFIX or pubkeyhash_encoding: pubkeyhash_encoding = True data_chunk_length = data_pubkey[0] # No ord() necessary. data_chunk = data_pubkey[1:data_chunk_length + 1] if data_chunk[-8:] == config.PREFIX: data += data_chunk[:-8] break else: data += data_chunk # Destination is the first output before the data. if not destination and not shell_amount and not data: address = get_address(vout.scriptPubKey) if address: destination = address shell_amount = vout.nValue # Check for, and strip away, prefix (except for burns). if destination == config.UNSPENDABLE: pass elif data[:len(config.PREFIX)] == config.PREFIX: data = data[len(config.PREFIX):] else: raise DecodeError('no prefix') # Only look for source if data were found or destination is UNSPENDABLE, for speed. if not data and destination != config.UNSPENDABLE: raise SCHOnlyError('no data and not unspendable') # Collect all possible source addresses; ignore coinbase transactions and anything but the simplest Pay‐to‐PubkeyHash inputs. source_list = [] for vin in ctx.vin[:]: # Loop through input transactions. if vin.prevout.is_null(): raise DecodeError('coinbase transaction') # Get the full transaction data for this input transaction. if block_parser: vin_tx = block_parser.read_raw_transaction(ib2h(vin.prevout.hash)) vin_ctx = backend.deserialize(vin_tx['__data__']) else: vin_tx = backend.getrawtransaction(ib2h(vin.prevout.hash)) vin_ctx = backend.deserialize(vin_tx) vout = vin_ctx.vout[vin.prevout.n] fee += vout.nValue address = get_address(vout.scriptPubKey) if not address: raise DecodeError('invalid scriptpubkey') else: source_list.append(address) # Require that all possible source addresses be the same. if all(x == source_list[0] for x in source_list): source = source_list[0] else: source = None return source, destination, shell_amount, fee, data