I often come here to get questions answered, so here is one script I created as a small token of my appreciation... and to get off the newbies list.
If you want to know if your block files are up to date just run the script below and compare the hash to blockchain.info.
It uses a few things from the Bitcoin Armory so get the latest source and drop this into the same directory as armoryengine.py
Code:
import sys
sys.argv.append('--nologging')
sys.argv.append('--offline')
from armoryengine import BTC_HOME_DIR, binary_to_int, LITTLEENDIAN, sha256, \
binary_to_hex, BIGENDIAN, ARMORY_HOME_DIR
import hashlib
import os
BLOCK_SIZE_LENGTH = 4
MAGIC_NUMBER_LENGTH = 4
HEADER_LENGTH = 80
def getLastBlockFile():
# the current last block file number
i = 80
blkFilePath = os.path.join(BTC_HOME_DIR, 'blocks', 'blk%05d.dat' % i)
lastFile = None
while True:
try:
with open(blkFilePath, 'rb') as f:
lastFile = blkFilePath
except IOError:
break
i += 1
blkFilePath = os.path.join(BTC_HOME_DIR, 'blocks', 'blk%05d.dat' % i)
return lastFile
def getFileSize(f):
pos = f.tell()
# Go to the end to get the file length
f.seek(0,2)
result = f.tell()
f.seek(pos)
return result
def getNextBlockHash(f):
fileOffset = f.tell()
f.seek(MAGIC_NUMBER_LENGTH, 1)
blkSize = binary_to_int(f.read(BLOCK_SIZE_LENGTH), LITTLEENDIAN)
result = None
if blkSize > 0:
blkString = f.read(blkSize)
blkHdrBinary = blkString[:HEADER_LENGTH]
result = sha256(sha256(blkHdrBinary))
else:
f.seek(0,2)
return result
def getLastBlockHash(blkFile):
result = None
with open(blkFile, 'rb') as f:
fSize = getFileSize(f)
while f.tell() < fSize:
blockHash = getNextBlockHash(f)
if blockHash != None:
result = blockHash
return result
lastHashPath = os.path.join(ARMORY_HOME_DIR, 'LastBlockHash.txt')
result = binary_to_hex(getLastBlockHash(getLastBlockFile()), BIGENDIAN)
with open(lastHashPath, 'w') as f:
f.write(result)
print result
Thanks for all of the help I've received so far.