import binascii from decimal import Decimal # from filecache import filecache, DAY import requests from . import types_pb2 as proto_types def fetch_json(url): try: r = requests.get(url, headers={'User-agent': 'Mozilla/5.0'}) return r.json() except: raise Exception('URL error: %s' % url) def insight_tx(url, rawdata=False): if not rawdata: data = fetch_json(url) else: data = url t = proto_types.TransactionType() t.version = data['version'] t.lock_time = data['locktime'] for vin in data['vin']: i = t.inputs.add() if 'coinbase' in vin.keys(): i.prev_hash = "\0"*32 i.prev_index = 0xffffffff # signed int -1 i.script_sig = binascii.unhexlify(vin['coinbase']) i.sequence = vin['sequence'] else: i.prev_hash = binascii.unhexlify(vin['txid']) i.prev_index = vin['vout'] i.script_sig = binascii.unhexlify(vin['scriptSig']['hex']) i.sequence = vin['sequence'] for vout in data['vout']: o = t.bin_outputs.add() o.amount = int(Decimal(str(vout['value'])) * 100000000) o.script_pubkey = binascii.unhexlify(vout['scriptPubKey']['hex']) return t def smartbit_tx(url, rawdata=False): if not rawdata: data = fetch_json(url) else: data = url data = data['transaction'] t = proto_types.TransactionType() t.version = int(data['version']) t.lock_time = data['locktime'] for vin in data['inputs']: i = t.inputs.add() if 'coinbase' in vin.keys(): i.prev_hash = "\0"*32 i.prev_index = 0xffffffff # signed int -1 i.script_sig = binascii.unhexlify(vin['coinbase']) i.sequence = vin['sequence'] else: i.prev_hash = binascii.unhexlify(vin['txid']) i.prev_index = vin['vout'] i.script_sig = binascii.unhexlify(vin['script_sig']['hex']) i.sequence = vin['sequence'] for vout in data['outputs']: o = t.bin_outputs.add() o.amount = int(Decimal(vout['value']) * 100000000) o.script_pubkey = binascii.unhexlify(vout['script_pub_key']['hex']) return t class TXAPIBitcoin(object): # @filecache(DAY) def get_tx(self, txhash): url = 'https://insight.bitpay.com/api/tx/%s' % txhash return insight_tx(url) class TXAPITestnet(object): # @filecache(DAY) def get_tx(self, txhash): url = 'https://test-insight.bitpay.com/api/tx/%s' % txhash return insight_tx(url) class TXAPISegnet(object): # @filecache(DAY) def get_tx(self, txhash): url = 'https://segnet-api.smartbit.com.au/v1/blockchain/tx/%s' % txhash return smartbit_tx(url)