def helloblock_fetchtx(txhash, network='btc'):
if not re.match('^[0-9a-fA-F]*$', txhash):
txhash = safe_hexlify(txhash)
if network == 'testnet':
url = 'https://testnet.helloblock.io/v1/transactions/'
elif network == 'btc':
url = 'https://mainnet.helloblock.io/v1/transactions/'
else:
raise Exception('Unsupported network {0} for helloblock_fetchtx'.format(network))
data = request(url + txhash)["data"]["transaction"]
o = {
"locktime": data["locktime"],
"version": data["version"],
"ins": [],
"outs": []
}
for inp in data["inputs"]:
o["ins"].append({
"script": inp["scriptSig"],
"outpoint": {
"index": inp["prevTxoutIndex"],
"hash": inp["prevTxHash"],
},
"sequence": 4294967295
})
for outp in data["outputs"]:
o["outs"].append({
"value": outp["value"],
"script": outp["scriptPubKey"]
})
from bitcoin.transaction import serialize
from bitcoin.transaction import txhash as TXHASH
tx = serialize(o)
assert TXHASH(tx) == txhash
return tx
def blockcypher_fetchtx(txhash, network=''):
if not re.match('^[0-9a-fA-F]*$', txhash):
txhash = safe_hexlify(txhash)
network = set_network(txhash) if network=="" else network
base_url = 'http://api.blockcypher.com/v1/btc/{network}/txs/{txid}?includeHex=true&limit=50'
if network == 'testnet':
url = base_url.format(network="test3", txid=txhash.lower())
elif network == 'btc':
url = base_url.format(network="main", txid=txhash.lower())
else:
raise Exception('Unsupported network {0} for blockcypher_fetchtx'.format(network))
jdata = json.loads(make_request(url))
txhex = jdata.get('hex')
from bitcoin.transaction import txhash as TXHASH
assert TXHASH(unhexlify(txhex)) == txhash
return txhex.encode()