mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-13 19:18:56 +00:00
83 lines
2.1 KiB
Python
83 lines
2.1 KiB
Python
import binascii
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import urllib2
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import json
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try:
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from filecache import filecache, MONTH
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except:
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def filecache(x):
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def _inner(y):
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return y
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return _inner
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MONTH = None
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import types_pb2 as proto_types
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def op_push(i):
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if i<0x4c:
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return chr(i)
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elif i<0xff:
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return '\x4c' + chr(i)
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elif i<0xffff:
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return '\x4d' + struct.pack("<H", i)
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else:
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return '\x4e' + struct.pack("<I", i)
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def opcode_serialize(opcode):
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# TODO: this function supports just small subset of script for now (enough for most transactions)
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if opcode == 'OP_DUP':
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return '\x76'
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if opcode == 'OP_HASH160':
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return '\xa9'
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if opcode == 'OP_EQUAL':
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return '\x87'
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if opcode == 'OP_EQUALVERIFY':
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return '\x88'
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if opcode == 'OP_CHECKSIG':
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return '\xac'
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# it's probably hex data
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try:
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x = binascii.unhexlify(opcode)
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return op_push(len(x)) + x
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except:
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raise Exception('Unknown script opcode: %s' % opcode)
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def bitcore_tx(url):
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f = urllib2.urlopen(url)
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data = json.load(f)
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t = proto_types.TransactionType()
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t.version = data['version']
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t.lock_time = data['locktime']
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for vin in data['vin']:
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i = t.inputs.add()
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i.prev_hash = binascii.unhexlify(vin['txid'])
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i.prev_index = vin['vout']
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asm = vin['scriptSig']['asm'].split(' ')
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asm = [ opcode_serialize(x) for x in asm ]
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i.script_sig = ''.join(asm)
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i.sequence = vin['sequence']
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for vout in data['vout']:
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o = t.outputs.add()
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o.amount = int(vout['value'] * 100000000)
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asm = vout['scriptPubKey']['asm'].split(' ')
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asm = [ opcode_serialize(x) for x in asm ]
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o.script_pubkey = ''.join(asm)
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return t
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class TXAPIBitcoin(object):
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@filecache(MONTH)
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def get_tx(self, txhash):
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url = 'http://live.bitcore.io/api/tx/%s' % txhash
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return bitcore_tx(url)
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class TXAPITestnet(object):
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@filecache(MONTH)
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def get_tx(self, txhash):
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url = 'http://test.bitcore.io/api/tx/%s' % txhash
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return bitcore_tx(url)
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