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get_block_coinbase (rename to view_coinbase)? #90

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get_block_coinbase (rename to view_coinbase)? #90

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16 changes: 14 additions & 2 deletions bitcoin/bci.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,22 +2,26 @@
import json, re
import random
import sys
import binascii
try:
from urllib.request import build_opener
except:
from urllib2 import build_opener

is_python2 = bytes == str
st = lambda u: str(u) if is_python2 else str(u, 'utf-8')
by = lambda v: bytes(v) if is_python2 else bytes(v, 'utf-8')

# Makes a request to a given URL (first arg) and optional params (second arg)
def make_request(*args):
opener = build_opener()
opener.addheaders = [('User-agent',
'Mozilla/5.0'+str(random.randrange(1000000)))]
try:
return opener.open(*args).read().strip()
return st(opener.open(*args).read().strip())
except Exception as e:
try:
p = e.read().strip()
p = st(e.read().strip())
except:
p = e
raise Exception(p)
Expand Down Expand Up @@ -382,3 +386,11 @@ def get_txs_in_block(inp):
def get_block_height(txhash):
j = json.loads(make_request('https://blockchain.info/rawtx/'+txhash))
return j['block_height']

def get_block_coinbase(inp):
j = _get_block(inp=inp)
cb = binascii.unhexlify( str(j['tx'][0]['inputs'][0]['script']))
alpha = ''.join(map(chr, list(range(32, 126)))) # make a list of printable chars
cbtxt = ''.join(map(chr, filter(
lambda x: chr(x) in alpha, bytearray(cb)))) # trim/remove non-printable chars
return cbtxt if len(cbtxt) > 6 else ''