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views.py
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views.py
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import json
import logging
from binascii import unhexlify
from django.conf import settings
from django.http import JsonResponse
from django.shortcuts import render
from bitcoin.rpc import Proxy
def index(request):
return render(request, 'index.jade')
def blockinfo(request):
'''
Accept ``GET`` parameters:
- since
'''
block_idx = bitcoin_rpc('getblockcount')
try:
block_start = int(request.GET.get('since', -21))
except ValueError:
block_start = -21
payload = {
'blockcount': block_idx,
'blocks': [
bitcoin_rpc('getblock', bitcoin_rpc('getblockhash', block_idx - i))
for i in range(min(
21,
block_idx + 1,
block_idx - block_start))
],
}
return JsonResponse(payload)
def bitcoin_rpc(*args, **kwargs):
'''
Wrapper of bitcoin.rpc
'''
try:
rpc = Proxy(settings.BITCOIN_API)
return rpc._call(*args, **kwargs)
except Exception as err:
logging.error(err)
return False
def getblock(request, block_id):
block_id = int(block_id)
block = bitcoin_rpc('getblock', bitcoin_rpc('getblockhash', block_id))
if not block:
return JsonResponse({
'state': 'error',
})
return JsonResponse(block)
def gettx(request, tx_id):
tx = bitcoin_rpc('gettransaction', tx_id)
if not tx:
return JsonResponse({
'state': 'error',
})
raw = tx.get('hex')
op_returns = []
if raw:
decode = tx['decode'] = bitcoin_rpc('decoderawtransaction', raw)
for out in decode.get('vout'):
script = out.get('scriptPubKey')
if not script:
continue
type_ = script.get('type')
if type_ != 'nulldata':
continue
asm = script.get('asm')
if not asm.startswith('OP_RETURN'):
continue
code = asm.split()[-1]
op_returns.append(json.loads(unhexlify(code).decode()))
return JsonResponse({
'tx': tx,
'op_returns': op_returns,
})