mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-14 03:30:02 +00:00
190 lines
6.6 KiB
Python
190 lines
6.6 KiB
Python
# This file is part of the TREZOR project.
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#
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# Copyright (C) 2012-2016 Marek Palatinus <slush@satoshilabs.com>
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# Copyright (C) 2012-2016 Pavol Rusnak <stick@satoshilabs.com>
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# Copyright (C) 2016 Jochen Hoenicke <hoenicke@gmail.com>
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this library. If not, see <http://www.gnu.org/licenses/>.
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import binascii
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from decimal import Decimal
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import requests
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import json
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from . import messages as proto
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cache_dir = None
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class TxApi(object):
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def __init__(self, network, url):
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self.network = network
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self.url = url
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def get_url(self, resource, resourceid):
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url = '%s%s/%s' % (self.url, resource, resourceid)
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return url
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def fetch_json(self, resource, resourceid):
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global cache_dir
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if cache_dir:
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cache_file = '%s/%s_%s_%s.json' % (cache_dir, self.network, resource, resourceid)
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try: # looking into cache first
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j = json.load(open(cache_file), parse_float=str)
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return j
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except:
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pass
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try:
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url = self.get_url(resource, resourceid)
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r = requests.get(url, headers={'User-agent': 'Mozilla/5.0'})
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j = r.json(parse_float=str)
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except:
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raise RuntimeError('URL error: %s' % url)
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if cache_dir and cache_file:
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try: # saving into cache
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json.dump(j, open(cache_file, 'w'))
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except:
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pass
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return j
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def get_tx(self, txhash):
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raise NotImplementedError
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class TxApiInsight(TxApi):
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def __init__(self, network, url, zcash=None):
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super(TxApiInsight, self).__init__(network, url)
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self.zcash = zcash
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def get_tx(self, txhash):
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data = self.fetch_json('tx', txhash)
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t = proto.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._add_inputs()
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if 'coinbase' in vin.keys():
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i.prev_hash = b"\0" * 32
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i.prev_index = 0xffffffff # signed int -1
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i.script_sig = binascii.unhexlify(vin['coinbase'])
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i.sequence = vin['sequence']
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else:
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i.prev_hash = binascii.unhexlify(vin['txid'])
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i.prev_index = vin['vout']
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i.script_sig = binascii.unhexlify(vin['scriptSig']['hex'])
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i.sequence = vin['sequence']
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for vout in data['vout']:
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o = t._add_bin_outputs()
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o.amount = int(Decimal(vout['value']) * 100000000)
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o.script_pubkey = binascii.unhexlify(vout['scriptPubKey']['hex'])
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if self.zcash:
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if t.version == 2:
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joinsplit_cnt = len(data['vjoinsplit'])
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if joinsplit_cnt == 0:
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t.extra_data = b'\x00'
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else:
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if joinsplit_cnt >= 253:
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# we assume cnt < 253, so we can treat varIntLen(cnt) as 1
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raise ValueError('Too many joinsplits')
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extra_data_len = 1 + joinsplit_cnt * 1802 + 32 + 64
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raw = self.fetch_json('rawtx', txhash)
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raw = binascii.unhexlify(raw['rawtx'])
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t.extra_data = raw[-extra_data_len:]
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return t
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class TxApiSmartbit(TxApi):
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def get_tx(self, txhash):
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data = self.fetch_json('tx', txhash)
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data = data['transaction']
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t = proto.TransactionType()
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t.version = int(data['version'])
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t.lock_time = data['locktime']
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for vin in data['inputs']:
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i = t.inputs.add()
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if 'coinbase' in vin.keys():
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i.prev_hash = b"\0" * 32
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i.prev_index = 0xffffffff # signed int -1
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i.script_sig = binascii.unhexlify(vin['coinbase'])
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i.sequence = vin['sequence']
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else:
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i.prev_hash = binascii.unhexlify(vin['txid'])
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i.prev_index = vin['vout']
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i.script_sig = binascii.unhexlify(vin['script_sig']['hex'])
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i.sequence = vin['sequence']
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for vout in data['outputs']:
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o = t.bin_outputs.add()
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o.amount = int(Decimal(vout['value']) * 100000000)
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o.script_pubkey = binascii.unhexlify(vout['script_pub_key']['hex'])
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return t
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class TxApiBlockCypher(TxApi):
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def get_tx(self, txhash):
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data = self.fetch_json('txs', txhash)
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t = proto.TransactionType()
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t.version = data['ver']
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t.lock_time = data['lock_time']
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for vin in data['inputs']:
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i = t.inputs.add()
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if 'prev_hash' not in vin:
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i.prev_hash = b"\0" * 32
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i.prev_index = 0xffffffff # signed int -1
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i.script_sig = binascii.unhexlify(vin['script'])
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i.sequence = vin['sequence']
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else:
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i.prev_hash = binascii.unhexlify(vin['prev_hash'])
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i.prev_index = vin['output_index']
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i.script_sig = binascii.unhexlify(vin['script'])
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i.sequence = vin['sequence']
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for vout in data['outputs']:
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o = t.bin_outputs.add()
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o.amount = int(str(vout['value']), 10)
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o.script_pubkey = binascii.unhexlify(vout['script'])
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return t
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TxApiBitcoin = TxApiInsight(network='insight_bitcoin', url='https://btc-bitcore1.trezor.io/api/')
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TxApiTestnet = TxApiInsight(network='insight_testnet', url='https://testnet-bitcore3.trezor.io/api/')
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TxApiLitecoin = TxApiInsight(network='insight_litecoin', url='https://ltc-bitcore1.trezor.io/api/')
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TxApiDash = TxApiInsight(network='insight_dash', url='https://dash-bitcore1.trezor.io/api/')
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TxApiZcash = TxApiInsight(network='insight_zcash', url='https://zec-bitcore1.trezor.io/api/', zcash=True)
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TxApiBcash = TxApiInsight(network='insight_zcash', url='https://bch-bitcore2.trezor.io/api/')
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TxApiDecredTestnet = TxApiInsight(network='insight_decred_testnet', url='https://testnet.decred.org/api/')
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TxApiSegnet = TxApiSmartbit(network='smartbit_segnet', url='https://segnet-api.smartbit.com.au/v1/blockchain/')
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