def estimate_fee(nblocks=6, network="btc"):
url = "%s/utils/estimatefee?nbBlocks=%d" % \
(BET_URL if network == "testnet" else BE_URL, int(nblocks))
data = json.loads(make_request(url)).decode('utf-8')
btc_to_satoshi = lambda b: int(b*1e8 + 0.5)
btcfee = data.get(str(nblocks), None)
return btc_to_satoshi(btcfee)
def history(*args):
# Valid input formats: history([addr1, addr2,addr3], "btc")
# history(addr1, addr2, addr3, "testnet")
if len(args) == 0 or (len(args)==1 and args[0] in ('testnet','btc')):
return []
addrs, network = parse_addr_args(*args)
if network == "btc":
txs = []
for addr in addrs:
offset = 0
while 1:
gathered = False
while not gathered:
try:
data = make_request('https://blockchain.info/address/%s?format=json&offset=%s' % (addr, offset))
gathered = True
except Exception as e:
try:
sys.stderr.write(e.read().strip())
except:
sys.stderr.write(str(e))
gathered = False
try:
jsonobj = json.loads(data)
except:
raise Exception("Failed to decode data: "+data)
txs.extend(jsonobj["txs"])
if len(jsonobj["txs"]) < 50:
break
offset += 50
sys.stderr.write("Fetching more transactions... "+str(offset)+'\n')
outs = {}
for tx in txs:
for o in tx["out"]:
if o.get('addr', None) in addrs:
key = str(tx["tx_index"])+':'+str(o["n"])
outs[key] = {
"address": o["addr"],
"value": o["value"],
"output": tx["hash"]+':'+str(o["n"]),
"block_height": tx.get("block_height", None)
}
for tx in txs: # if output is spent adds "spend": "spending_TxID:i"
for i, inp in enumerate(tx["inputs"]):
if "prev_out" in inp:
if inp["prev_out"].get("addr", None) in addrs:
key = str(inp["prev_out"]["tx_index"]) + \
':'+str(inp["prev_out"]["n"])
if outs.get(key):
outs[key]["spend"] = tx["hash"] + ':' + str(i)
return [outs[k] for k in outs]
elif network == "testnet":
txs = [] # using https://api.biteasy.com/blockchain/v1/transactions?address=_ADDR_
for addr in addrs: # or
offset = 0
while 1:
gathered = False
while not gathered:
try:
data = make_request("%s/txs/?address=%s" % (BET_URL, addr))
gathered = True
except Exception as e:
try: sys.stderr.write(e.read().strip())
except: sys.stderr.write(str(e))
gathered = False
try:
jsonobj = json.loads(data)
except:
raise Exception("Failed to decode data: " + data)
txs.extend(jsonobj['txs'])
#assert addr == jsonobj.get("addrStr"), "Tx data doesn't match address %s" % addr
#if len(jsonobj['data']['address']['inout_count_total']) >= 300: # because records=300
# break
#offset += 100
#sys.stderr.write("Fetching more transactions... " + str(offset) + '\n')
outs = {}
from bitcoin.main import hex_to_b58check, btc_to_satoshi
for tx in txs:
for o in tx.get("vout"):
if o.get('scriptPubKey', None) and hex_to_b58check(o.get("scriptPubKey"])["hex"], 111) == addr:
key = str(tx["time"]) + ':' + str(o["n"])
outs[key] = {
"address": addr,
"value": btc_to_satoshi(o["value"]),
"output": "{0}:{1}".format(tx["txid"], str(o["n"])),
}
blkhash = tx.get("blockhash")
try:
bheight = get_block_height(blkhash, 'testnet')
outs[key].update({"block_height": int(bheight)})
except:
sys.stderr.write("Couldn't get blockheight for %s.\nUsing blocktime instead" % blkhash)
outs[key].update({"block_time": tx.get("time")})
