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730 lines
25 KiB
730 lines
25 KiB
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2011 thomasv@gitorious
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Note: The deserialization code originally comes from ABE.
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from bitcoin import *
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from util import print_error
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import time
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import struct
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#
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# Workalike python implementation of Bitcoin's CDataStream class.
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#
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import struct
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import StringIO
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import mmap
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class SerializationError(Exception):
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""" Thrown when there's a problem deserializing or serializing """
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class BCDataStream(object):
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def __init__(self):
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self.input = None
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self.read_cursor = 0
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def clear(self):
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self.input = None
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self.read_cursor = 0
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def write(self, bytes): # Initialize with string of bytes
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if self.input is None:
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self.input = bytes
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else:
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self.input += bytes
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def map_file(self, file, start): # Initialize with bytes from file
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self.input = mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ)
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self.read_cursor = start
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def seek_file(self, position):
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self.read_cursor = position
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def close_file(self):
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self.input.close()
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def read_string(self):
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# Strings are encoded depending on length:
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# 0 to 252 : 1-byte-length followed by bytes (if any)
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# 253 to 65,535 : byte'253' 2-byte-length followed by bytes
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# 65,536 to 4,294,967,295 : byte '254' 4-byte-length followed by bytes
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# ... and the Bitcoin client is coded to understand:
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# greater than 4,294,967,295 : byte '255' 8-byte-length followed by bytes of string
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# ... but I don't think it actually handles any strings that big.
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if self.input is None:
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raise SerializationError("call write(bytes) before trying to deserialize")
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try:
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length = self.read_compact_size()
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except IndexError:
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raise SerializationError("attempt to read past end of buffer")
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return self.read_bytes(length)
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def write_string(self, string):
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# Length-encoded as with read-string
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self.write_compact_size(len(string))
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self.write(string)
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def read_bytes(self, length):
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try:
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result = self.input[self.read_cursor:self.read_cursor+length]
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self.read_cursor += length
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return result
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except IndexError:
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raise SerializationError("attempt to read past end of buffer")
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return ''
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def read_boolean(self): return self.read_bytes(1)[0] != chr(0)
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def read_int16(self): return self._read_num('<h')
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def read_uint16(self): return self._read_num('<H')
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def read_int32(self): return self._read_num('<i')
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def read_uint32(self): return self._read_num('<I')
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def read_int64(self): return self._read_num('<q')
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def read_uint64(self): return self._read_num('<Q')
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def write_boolean(self, val): return self.write(chr(1) if val else chr(0))
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def write_int16(self, val): return self._write_num('<h', val)
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def write_uint16(self, val): return self._write_num('<H', val)
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def write_int32(self, val): return self._write_num('<i', val)
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def write_uint32(self, val): return self._write_num('<I', val)
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def write_int64(self, val): return self._write_num('<q', val)
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def write_uint64(self, val): return self._write_num('<Q', val)
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def read_compact_size(self):
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size = ord(self.input[self.read_cursor])
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self.read_cursor += 1
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if size == 253:
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size = self._read_num('<H')
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elif size == 254:
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size = self._read_num('<I')
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elif size == 255:
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size = self._read_num('<Q')
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return size
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def write_compact_size(self, size):
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if size < 0:
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raise SerializationError("attempt to write size < 0")
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elif size < 253:
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self.write(chr(size))
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elif size < 2**16:
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self.write('\xfd')
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self._write_num('<H', size)
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elif size < 2**32:
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self.write('\xfe')
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self._write_num('<I', size)
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elif size < 2**64:
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self.write('\xff')
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self._write_num('<Q', size)
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def _read_num(self, format):
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(i,) = struct.unpack_from(format, self.input, self.read_cursor)
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self.read_cursor += struct.calcsize(format)
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return i
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def _write_num(self, format, num):
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s = struct.pack(format, num)
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self.write(s)
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#
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# enum-like type
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# From the Python Cookbook, downloaded from http://code.activestate.com/recipes/67107/
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#
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import types, string, exceptions
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class EnumException(exceptions.Exception):
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pass
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class Enumeration:
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def __init__(self, name, enumList):
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self.__doc__ = name
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lookup = { }
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reverseLookup = { }
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i = 0
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uniqueNames = [ ]
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uniqueValues = [ ]
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for x in enumList:
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if type(x) == types.TupleType:
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x, i = x
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if type(x) != types.StringType:
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raise EnumException, "enum name is not a string: " + x
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if type(i) != types.IntType:
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raise EnumException, "enum value is not an integer: " + i
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if x in uniqueNames:
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raise EnumException, "enum name is not unique: " + x
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if i in uniqueValues:
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raise EnumException, "enum value is not unique for " + x
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uniqueNames.append(x)
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uniqueValues.append(i)
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lookup[x] = i
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reverseLookup[i] = x
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i = i + 1
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self.lookup = lookup
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self.reverseLookup = reverseLookup
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def __getattr__(self, attr):
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if not self.lookup.has_key(attr):
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raise AttributeError
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return self.lookup[attr]
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def whatis(self, value):
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return self.reverseLookup[value]
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# This function comes from bitcointools, bct-LICENSE.txt.
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def long_hex(bytes):
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return bytes.encode('hex_codec')
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# This function comes from bitcointools, bct-LICENSE.txt.
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def short_hex(bytes):
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t = bytes.encode('hex_codec')
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if len(t) < 11:
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return t
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return t[0:4]+"..."+t[-4:]
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def parse_redeemScript(bytes):
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dec = [ x for x in script_GetOp(bytes.decode('hex')) ]
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# 2 of 2
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match = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
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if match_decoded(dec, match):
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pubkeys = [ dec[1][1].encode('hex'), dec[2][1].encode('hex') ]
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return 2, pubkeys
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# 2 of 3
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match = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
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if match_decoded(dec, match):
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pubkeys = [ dec[1][1].encode('hex'), dec[2][1].encode('hex'), dec[3][1].encode('hex') ]
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return 2, pubkeys
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opcodes = Enumeration("Opcodes", [
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("OP_0", 0), ("OP_PUSHDATA1",76), "OP_PUSHDATA2", "OP_PUSHDATA4", "OP_1NEGATE", "OP_RESERVED",
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"OP_1", "OP_2", "OP_3", "OP_4", "OP_5", "OP_6", "OP_7",
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"OP_8", "OP_9", "OP_10", "OP_11", "OP_12", "OP_13", "OP_14", "OP_15", "OP_16",
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"OP_NOP", "OP_VER", "OP_IF", "OP_NOTIF", "OP_VERIF", "OP_VERNOTIF", "OP_ELSE", "OP_ENDIF", "OP_VERIFY",
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"OP_RETURN", "OP_TOALTSTACK", "OP_FROMALTSTACK", "OP_2DROP", "OP_2DUP", "OP_3DUP", "OP_2OVER", "OP_2ROT", "OP_2SWAP",
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"OP_IFDUP", "OP_DEPTH", "OP_DROP", "OP_DUP", "OP_NIP", "OP_OVER", "OP_PICK", "OP_ROLL", "OP_ROT",
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"OP_SWAP", "OP_TUCK", "OP_CAT", "OP_SUBSTR", "OP_LEFT", "OP_RIGHT", "OP_SIZE", "OP_INVERT", "OP_AND",
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"OP_OR", "OP_XOR", "OP_EQUAL", "OP_EQUALVERIFY", "OP_RESERVED1", "OP_RESERVED2", "OP_1ADD", "OP_1SUB", "OP_2MUL",
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"OP_2DIV", "OP_NEGATE", "OP_ABS", "OP_NOT", "OP_0NOTEQUAL", "OP_ADD", "OP_SUB", "OP_MUL", "OP_DIV",
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"OP_MOD", "OP_LSHIFT", "OP_RSHIFT", "OP_BOOLAND", "OP_BOOLOR",
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"OP_NUMEQUAL", "OP_NUMEQUALVERIFY", "OP_NUMNOTEQUAL", "OP_LESSTHAN",
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"OP_GREATERTHAN", "OP_LESSTHANOREQUAL", "OP_GREATERTHANOREQUAL", "OP_MIN", "OP_MAX",
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"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
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"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
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"OP_CHECKMULTISIGVERIFY",
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("OP_SINGLEBYTE_END", 0xF0),
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("OP_DOUBLEBYTE_BEGIN", 0xF000),
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"OP_PUBKEY", "OP_PUBKEYHASH",
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("OP_INVALIDOPCODE", 0xFFFF),
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])
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def script_GetOp(bytes):
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i = 0
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while i < len(bytes):
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vch = None
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opcode = ord(bytes[i])
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i += 1
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if opcode >= opcodes.OP_SINGLEBYTE_END:
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opcode <<= 8
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opcode |= ord(bytes[i])
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i += 1
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if opcode <= opcodes.OP_PUSHDATA4:
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nSize = opcode
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if opcode == opcodes.OP_PUSHDATA1:
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nSize = ord(bytes[i])
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i += 1
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elif opcode == opcodes.OP_PUSHDATA2:
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(nSize,) = struct.unpack_from('<H', bytes, i)
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i += 2
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elif opcode == opcodes.OP_PUSHDATA4:
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(nSize,) = struct.unpack_from('<I', bytes, i)
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i += 4
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vch = bytes[i:i+nSize]
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i += nSize
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yield (opcode, vch, i)
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def script_GetOpName(opcode):
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return (opcodes.whatis(opcode)).replace("OP_", "")
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def decode_script(bytes):
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result = ''
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for (opcode, vch, i) in script_GetOp(bytes):
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if len(result) > 0: result += " "
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if opcode <= opcodes.OP_PUSHDATA4:
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result += "%d:"%(opcode,)
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result += short_hex(vch)
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else:
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result += script_GetOpName(opcode)
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return result
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def match_decoded(decoded, to_match):
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if len(decoded) != len(to_match):
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return False;
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for i in range(len(decoded)):
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if to_match[i] == opcodes.OP_PUSHDATA4 and decoded[i][0] <= opcodes.OP_PUSHDATA4 and decoded[i][0]>0:
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continue # Opcodes below OP_PUSHDATA4 all just push data onto stack, and are equivalent.
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if to_match[i] != decoded[i][0]:
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return False
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return True
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def get_address_from_input_script(bytes):
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try:
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decoded = [ x for x in script_GetOp(bytes) ]
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except Exception:
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# coinbase transactions raise an exception
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print_error("cannot find address in input script", bytes.encode('hex'))
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return [], [], "(None)"
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# payto_pubkey
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match = [ opcodes.OP_PUSHDATA4 ]
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if match_decoded(decoded, match):
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return None, None, "(pubkey)"
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# non-generated TxIn transactions push a signature
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# (seventy-something bytes) and then their public key
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# (65 bytes) onto the stack:
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match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
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if match_decoded(decoded, match):
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return None, None, public_key_to_bc_address(decoded[1][1])
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# p2sh transaction, 2 of n
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match = [ opcodes.OP_0 ]
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while len(match) < len(decoded):
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match.append(opcodes.OP_PUSHDATA4)
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if match_decoded(decoded, match):
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redeemScript = decoded[-1][1]
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num = len(match) - 2
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signatures = map(lambda x:x[1][:-1].encode('hex'), decoded[1:-1])
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dec2 = [ x for x in script_GetOp(redeemScript) ]
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# 2 of 2
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match2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
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if match_decoded(dec2, match2):
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pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex') ]
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return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
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# 2 of 3
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match2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
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if match_decoded(dec2, match2):
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pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex'), dec2[3][1].encode('hex') ]
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return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
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print_error("cannot find address in input script", bytes.encode('hex'))
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return [], [], "(None)"
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def get_address_from_output_script(bytes):
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decoded = [ x for x in script_GetOp(bytes) ]
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# The Genesis Block, self-payments, and pay-by-IP-address payments look like:
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# 65 BYTES:... CHECKSIG
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match = [ opcodes.OP_PUSHDATA4, opcodes.OP_CHECKSIG ]
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if match_decoded(decoded, match):
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return True, public_key_to_bc_address(decoded[0][1])
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# Pay-by-Bitcoin-address TxOuts look like:
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# DUP HASH160 20 BYTES:... EQUALVERIFY CHECKSIG
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match = [ opcodes.OP_DUP, opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG ]
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if match_decoded(decoded, match):
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return False, hash_160_to_bc_address(decoded[2][1])
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# p2sh
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match = [ opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUAL ]
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if match_decoded(decoded, match):
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return False, hash_160_to_bc_address(decoded[1][1],5)
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return False, "(None)"
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class Transaction:
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def __init__(self, raw, is_complete = True):
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self.raw = raw
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self.deserialize()
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self.inputs = self.d['inputs']
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self.outputs = self.d['outputs']
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self.outputs = map(lambda x: (x['address'],x['value']), self.outputs)
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self.locktime = self.d['lockTime']
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self.is_complete = is_complete
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def __str__(self):
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return self.raw
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@classmethod
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def from_io(klass, inputs, outputs):
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raw = klass.serialize(inputs, outputs, for_sig = -1) # for_sig=-1 means do not sign
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self = klass(raw)
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self.is_complete = False
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self.inputs = inputs
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self.outputs = outputs
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return self
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@classmethod
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def multisig_script(klass, public_keys, num=None):
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n = len(public_keys)
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if num is None: num = n
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# supports only "2 of 2", and "2 of 3" transactions
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assert num <= n and n in [2,3]
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if num==2:
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s = '52'
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elif num == 3:
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s = '53'
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else:
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raise
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for k in public_keys:
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s += var_int(len(k)/2)
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s += k
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if n==2:
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s += '52'
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elif n==3:
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s += '53'
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else:
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raise
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s += 'ae'
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return s
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@classmethod
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def serialize( klass, inputs, outputs, for_sig = None ):
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s = int_to_hex(1,4) # version
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s += var_int( len(inputs) ) # number of inputs
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for i in range(len(inputs)):
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txin = inputs[i]
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s += txin['prevout_hash'].decode('hex')[::-1].encode('hex') # prev hash
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s += int_to_hex(txin['prevout_n'],4) # prev index
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if for_sig is None:
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signatures = txin['signatures']
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pubkeys = txin['pubkeys']
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if not txin.get('redeemScript'):
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pubkey = pubkeys[0]
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script = ''
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if signatures:
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sig = signatures[0]
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sig = sig + '01' # hashtype
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script += op_push(len(sig)/2)
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script += sig
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script += op_push(len(pubkey)/2)
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script += pubkey
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else:
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script = '00' # op_0
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for sig in signatures:
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sig = sig + '01'
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script += op_push(len(sig)/2)
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script += sig
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redeem_script = klass.multisig_script(pubkeys,2)
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script += op_push(len(redeem_script)/2)
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script += redeem_script
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elif for_sig==i:
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if txin.get('redeemScript'):
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script = txin['redeemScript'] # p2sh uses the inner script
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else:
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script = txin['scriptPubKey'] # scriptsig
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else:
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script=''
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s += var_int( len(script)/2 ) # script length
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s += script
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s += "ffffffff" # sequence
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s += var_int( len(outputs) ) # number of outputs
|
|
for output in outputs:
|
|
addr, amount = output
|
|
s += int_to_hex( amount, 8) # amount
|
|
addrtype, hash_160 = bc_address_to_hash_160(addr)
|
|
if addrtype == 0:
|
|
script = '76a9' # op_dup, op_hash_160
|
|
script += '14' # push 0x14 bytes
|
|
script += hash_160.encode('hex')
|
|
script += '88ac' # op_equalverify, op_checksig
|
|
elif addrtype == 5:
|
|
script = 'a9' # op_hash_160
|
|
script += '14' # push 0x14 bytes
|
|
script += hash_160.encode('hex')
|
|
script += '87' # op_equal
|
|
else:
|
|
raise
|
|
|
|
s += var_int( len(script)/2 ) # script length
|
|
s += script # script
|
|
s += int_to_hex(0,4) # lock time
|
|
if for_sig is not None and for_sig != -1:
|
|
s += int_to_hex(1, 4) # hash type
|
|
return s
|
|
|
|
|
|
def for_sig(self,i):
|
|
return self.serialize(self.inputs, self.outputs, for_sig = i)
|
|
|
|
|
|
def hash(self):
|
|
return Hash(self.raw.decode('hex') )[::-1].encode('hex')
|
|
|
|
|
|
|
|
def sign(self, keypairs):
|
|
is_complete = True
|
|
print_error("tx.sign(), keypairs:", keypairs)
|
|
|
|
for i, txin in enumerate(self.inputs):
|
|
|
|
# if the input is multisig, parse redeem script
|
|
redeem_script = txin.get('redeemScript')
|
|
num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
|
|
|
|
# add pubkeys
|
|
txin["pubkeys"] = redeem_pubkeys
|
|
# get list of already existing signatures
|
|
signatures = txin.get("signatures",[])
|
|
# continue if this txin is complete
|
|
if len(signatures) == num:
|
|
continue
|
|
|
|
tx_for_sig = self.serialize( self.inputs, self.outputs, for_sig = i )
|
|
for pubkey in redeem_pubkeys:
|
|
# check if we have the corresponding private key
|
|
if pubkey in keypairs.keys():
|
|
# add signature
|
|
sec = keypairs[pubkey]
|
|
compressed = is_compressed(sec)
|
|
pkey = regenerate_key(sec)
|
|
secexp = pkey.secret
|
|
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
|
|
public_key = private_key.get_verifying_key()
|
|
sig = private_key.sign_digest_deterministic( Hash( tx_for_sig.decode('hex') ), hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_der )
|
|
assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
|
|
signatures.append( sig.encode('hex') )
|
|
print_error("adding signature for", pubkey)
|
|
|
|
txin["signatures"] = signatures
|
|
is_complete = is_complete and len(signatures) == num
|
|
|
|
self.is_complete = is_complete
|
|
self.raw = self.serialize( self.inputs, self.outputs )
|
|
|
|
|
|
def deserialize(self):
|
|
vds = BCDataStream()
|
|
vds.write(self.raw.decode('hex'))
|
|
d = {}
|
|
start = vds.read_cursor
|
|
d['version'] = vds.read_int32()
|
|
n_vin = vds.read_compact_size()
|
|
d['inputs'] = []
|
|
for i in xrange(n_vin):
|
|
d['inputs'].append(self.parse_input(vds))
|
|
n_vout = vds.read_compact_size()
|
|
d['outputs'] = []
|
|
for i in xrange(n_vout):
|
|
d['outputs'].append(self.parse_output(vds, i))
|
|
d['lockTime'] = vds.read_uint32()
|
|
self.d = d
|
|
return self.d
|
|
|
|
|
|
def parse_input(self, vds):
|
|
d = {}
|
|
d['prevout_hash'] = hash_encode(vds.read_bytes(32))
|
|
d['prevout_n'] = vds.read_uint32()
|
|
scriptSig = vds.read_bytes(vds.read_compact_size())
|
|
d['sequence'] = vds.read_uint32()
|
|
|
|
if scriptSig:
|
|
pubkeys, signatures, address = get_address_from_input_script(scriptSig)
|
|
else:
|
|
pubkeys = []
|
|
signatures = []
|
|
address = None
|
|
|
|
d['address'] = address
|
|
d['signatures'] = signatures
|
|
return d
|
|
|
|
|
|
def parse_output(self, vds, i):
|
|
d = {}
|
|
d['value'] = vds.read_int64()
|
|
scriptPubKey = vds.read_bytes(vds.read_compact_size())
|
|
is_pubkey, address = get_address_from_output_script(scriptPubKey)
|
|
d['is_pubkey'] = is_pubkey
|
|
d['address'] = address
|
|
d['scriptPubKey'] = scriptPubKey.encode('hex')
|
|
d['prevout_n'] = i
|
|
return d
|
|
|
|
|
|
def add_extra_addresses(self, txlist):
|
|
for i in self.inputs:
|
|
if i.get("address") == "(pubkey)":
|
|
prev_tx = txlist.get(i.get('prevout_hash'))
|
|
if prev_tx:
|
|
address, value = prev_tx.outputs[i.get('prevout_n')]
|
|
print_error("found pay-to-pubkey address:", address)
|
|
i["address"] = address
|
|
|
|
|
|
def has_address(self, addr):
|
|
found = False
|
|
for txin in self.inputs:
|
|
if addr == txin.get('address'):
|
|
found = True
|
|
break
|
|
for txout in self.outputs:
|
|
if addr == txout[0]:
|
|
found = True
|
|
break
|
|
return found
|
|
|
|
|
|
def get_value(self, addresses, prevout_values):
|
|
# return the balance for that tx
|
|
is_relevant = False
|
|
is_send = False
|
|
is_pruned = False
|
|
is_partial = False
|
|
v_in = v_out = v_out_mine = 0
|
|
|
|
for item in self.inputs:
|
|
addr = item.get('address')
|
|
if addr in addresses:
|
|
is_send = True
|
|
is_relevant = True
|
|
key = item['prevout_hash'] + ':%d'%item['prevout_n']
|
|
value = prevout_values.get( key )
|
|
if value is None:
|
|
is_pruned = True
|
|
else:
|
|
v_in += value
|
|
else:
|
|
is_partial = True
|
|
|
|
if not is_send: is_partial = False
|
|
|
|
for item in self.outputs:
|
|
addr, value = item
|
|
v_out += value
|
|
if addr in addresses:
|
|
v_out_mine += value
|
|
is_relevant = True
|
|
|
|
if is_pruned:
|
|
# some inputs are mine:
|
|
fee = None
|
|
if is_send:
|
|
v = v_out_mine - v_out
|
|
else:
|
|
# no input is mine
|
|
v = v_out_mine
|
|
|
|
else:
|
|
v = v_out_mine - v_in
|
|
|
|
if is_partial:
|
|
# some inputs are mine, but not all
|
|
fee = None
|
|
is_send = v < 0
|
|
else:
|
|
# all inputs are mine
|
|
fee = v_out - v_in
|
|
|
|
return is_relevant, is_send, v, fee
|
|
|
|
|
|
def get_input_info(self):
|
|
info = []
|
|
for i in self.inputs:
|
|
item = {
|
|
'prevout_hash':i['prevout_hash'],
|
|
'prevout_n':i['prevout_n'],
|
|
'address':i.get('address'),
|
|
'KeyID':i.get('KeyID'),
|
|
'scriptPubKey':i.get('scriptPubKey'),
|
|
'redeemScript':i.get('redeemScript'),
|
|
'redeemPubkey':i.get('redeemPubkey'),
|
|
'pubkeys':i.get('pubkeys'),
|
|
'signatures':i.get('signatures',[]),
|
|
}
|
|
info.append(item)
|
|
return info
|
|
|
|
|
|
def as_dict(self):
|
|
import json
|
|
out = {
|
|
"hex":self.raw,
|
|
"complete":self.is_complete
|
|
}
|
|
|
|
if not self.is_complete:
|
|
input_info = self.get_input_info()
|
|
out['input_info'] = json.dumps(input_info).replace(' ','')
|
|
|
|
return out
|
|
|
|
|
|
def requires_fee(self, verifier):
|
|
# see https://en.bitcoin.it/wiki/Transaction_fees
|
|
threshold = 57600000
|
|
size = len(self.raw)/2
|
|
if size >= 10000:
|
|
return True
|
|
|
|
for o in self.outputs:
|
|
value = o[1]
|
|
if value < 1000000:
|
|
return True
|
|
sum = 0
|
|
for i in self.inputs:
|
|
age = verifier.get_confirmations(i["prevout_hash"])[0]
|
|
sum += i["value"] * age
|
|
priority = sum / size
|
|
print_error(priority, threshold)
|
|
return priority < threshold
|
|
|
|
|
|
|
|
def add_input_info(self, input_info):
|
|
for i, txin in enumerate(self.inputs):
|
|
item = input_info[i]
|
|
txin['address'] = item['address']
|
|
txin['signatures'] = item['signatures']
|
|
txin['scriptPubKey'] = item['scriptPubKey']
|
|
txin['redeemScript'] = item.get('redeemScript')
|
|
txin['redeemPubkey'] = item.get('redeemPubkey')
|
|
txin['KeyID'] = item.get('KeyID')
|
|
|