AaronFiore/electrum
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stop using eval

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This commit is contained in:
Bryan Stitt
2013-11-11 22:03:20 -08:00
parent d93c642c5c
commit 91061752cf
5 changed files with 16 additions and 10 deletions
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11
lib/blockchain.py
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@@ -18,7 +18,7 @@
import threading, time, Queue, os, sys, shutil
from util import user_dir, appdata_dir, print_error
from util import user_dir, appdata_dir, print_error, hex_to_int
from bitcoin import *
@@ -118,7 +118,7 @@ class Blockchain(threading.Thread):
try:
assert prev_hash == header.get('prev_block_hash')
assert bits == header.get('bits')
assert eval('0x'+_hash) < target
assert hex_to_int(_hash) < target
except Exception:
return False
@@ -149,7 +149,7 @@ class Blockchain(threading.Thread):
_hash = self.hash_header(header)
assert previous_hash == header.get('prev_block_hash')
assert bits == header.get('bits')
assert eval('0x'+_hash) < target
assert hex_to_int(_hash) < target
previous_header = header
previous_hash = _hash
@@ -175,7 +175,7 @@ class Blockchain(threading.Thread):
try:
assert prev_hash == header.get('prev_block_hash')
assert bits == header.get('bits')
assert eval('0x'+_hash) < target
assert hex_to_int(_hash) < target
except Exception:
# this can be caused by a reorg.
print_error("verify header failed"+ repr(header))
@@ -200,7 +200,6 @@ class Blockchain(threading.Thread):
def header_from_string(self, s):
hex_to_int = lambda s: eval('0x' + s[::-1].encode('hex'))
h = {}
h['version'] = hex_to_int(s[0:4])
h['prev_block_hash'] = hash_encode(s[4:36])
@@ -306,7 +305,7 @@ class Blockchain(threading.Thread):
c = c[2:]
i -= 1
c = eval('0x'+c[0:6])
c = hex_to_int(c[0:6])
if c > 0x800000:
c /= 256
i += 1