def scan_block(rpc_raw):
blockcount = rpc_raw.getblockcount()
bkscan = BlockchainScan.objects.all().first() #Attempt to pick up where we left off.
if not bkscan: #First scan!
bkscan = BlockchainScan(last_index=(blockcount-1000))
bkscan.save()
current_index = bkscan.last_index
on_latest_block = True if current_index >= blockcount else False
processed_transactions = {}
if on_latest_block:
#If we are on the latest block, we'll be scanning the mempool later
mpscan = MemPoolScan.objects.all().first()
if not mpscan:
mpscan = MemPoolScan(txids_scanned=json.dumps({}))
mpscan.save()
#get tx_ids we already scanned in mempool.
processed_transactions = json.loads(mpscan.txids_scanned)
try:
block_hash = rpc_raw.getblockhash(current_index) #convert block index to hash
print "...scanning block", current_index
bi = rpc_raw.getblock(block_hash) #get list of tx_ids in block
for tx_id in bi['tx']:
if tx_id not in processed_transactions: #only process transactions once
block_time = bi['time'] if 'time' in bi else datetime.datetime.now()
parse_transaction(rpc_raw, tx_id, current_index, block_time)
current_index += 1
BlockchainScan.objects.all().update(last_index=current_index)
if on_latest_block:
print "wiping mempool"
#wipe mempool scan (assume mempool transactions were added to this block)
MemPoolScan.objects.all().update(txids_scanned="{}")
processed_transactions = {}
except JSONRPCException:
pass #at last block
if on_latest_block:
#Let's scan that mempool!
print "processing mempool..."
unconfirmed_transactions = rpc_raw.getrawmempool()
count_new = 0
for tx_id in unconfirmed_transactions:
if tx_id not in processed_transactions:
parse_transaction(rpc_raw, tx_id, current_index, datetime.datetime.now())
processed_transactions[tx_id] = 1
count_new += 1
print "(found", count_new, "transactions)"
MemPoolScan.objects.all().update(txids_scanned=json.dumps(processed_transactions))
return True, blockcount - current_index
return False, blockcount - current_index
def get_blockchain_scan_status(rpc_raw):
blockcount = rpc_raw.getblockcount()
bkscan = BlockchainScan.objects.all().first() #Attempt to pick up where we left off.
if not bkscan: #First scan!
bkscan = BlockchainScan(last_index=(blockcount-1000))
bkscan.save()
current_index = bkscan.last_index
on_latest_block = True if current_index >= blockcount else False
return on_latest_block, blockcount - current_index