@ -191,7 +191,7 @@ class Blockchain(util.PrintError):
return
self.print_error('Truncating headers file at height %d'%self.checkpoint_height)
name = self.path()
f = open(name, 'rwb+')
f = open(name, 'rb+')
f.seek(self.checkpoint_height * 80)
f.truncate()
f.close()