/
difficulty.py
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/
difficulty.py
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#!/usr/bin/env python
# difficulty parser
# usage: difficulty.py > out
import datetime
import time
import struct
import urllib
import os
import sys
import decimal, math
from pyblockchain import BlockParser
def bits2diff(bits):
fast_log = math.log
exp = math.exp
max_body = fast_log(0x00ffff)
scaland = fast_log(256)
return exp(max_body - fast_log(bits & 0x00ffffff) + scaland * (0x1d - ((bits & 0xff000000) >> 24)))
class DiffParser(BlockParser):
def __init__(self):
BlockParser.__init__(self)
self.startblock = 0
self.stopblock = -1
self.bits = -1
self.diff = 1.0
self.ts = 0
def block_header(self, pos, size, header, r):
(ver, pb, mr, ts, bits, nonce) = struct.unpack('I32s32sIII', header)
if bits != self.bits and ts > self.ts:
if self.bits == -1:
self.bits = bits
diff = bits2diff(bits)
delta = diff / self.diff
date = datetime.datetime.fromtimestamp(ts).strftime("%Y-%m-%d")
print self.block, date, diff, delta
self.bits = bits
self.diff = diff
self.ts = ts
def main():
p = DiffParser()
p.scan()
if __name__ == '__main__':
main()