AttributeError: 'mpz' object has no attribute 'to_bytes'

[ProfessorVenkman]

Crash Report

This crash report was reported through the automatic crash reporting system 🤖

Traceback

  File "/usr/lib/python3.7/site-packages/electroncash/util.py", line 730, in run_with_except_hook
    run_original(*args2, **kwargs2)
  File "/usr/lib/python3.7/site-packages/electroncash/network.py", line 1411, in run
    self.wait_on_sockets()
  File "/usr/lib/python3.7/site-packages/electroncash/network.py", line 1385, in wait_on_sockets
    self.process_responses(interface)
  File "/usr/lib/python3.7/site-packages/electroncash/network.py", line 814, in process_responses
    self.process_response(interface, request, response, callbacks)
  File "/usr/lib/python3.7/site-packages/electroncash/network.py", line 759, in process_response
    callback(response)
  File "/usr/lib/python3.7/site-packages/electroncash/verifier.py", line 150, in verify_merkle
    self.wallet.save_verified_tx(write=True)
  File "/usr/lib/python3.7/site-packages/electroncash/wallet.py", line 306, in save_verified_tx
    self.storage.write()
  File "/usr/lib/python3.7/site-packages/electroncash/util.py", line 316, in <lambda>
    return lambda *args, **kw_args: do_profile(args, kw_args)
  File "/usr/lib/python3.7/site-packages/electroncash/util.py", line 312, in do_profile
    o = func(*args, **kw_args)
  File "/usr/lib/python3.7/site-packages/electroncash/storage.py", line 177, in write
    self._write()
  File "/usr/lib/python3.7/site-packages/electroncash/storage.py", line 189, in _write
    s = bitcoin.encrypt_message(c, self.pubkey)
  File "/usr/lib/python3.7/site-packages/electroncash/bitcoin.py", line 540, in encrypt_message
    return EC_KEY.encrypt_message(message, bfh(pubkey))
  File "/usr/lib/python3.7/site-packages/electroncash/bitcoin.py", line 697, in encrypt_message
    ecdh_key = point_to_ser(pk * ephemeral.privkey.secret_multiplier)
  File "/usr/lib/python3.7/site-packages/electroncash/ecc_fast.py", line 132, in mul
    public_pair_bytes = b'\4' + self.x().to_bytes(32, byteorder="big") + self.y().to_bytes(32, byteorder="big")

AttributeError: 'mpz' object has no attribute 'to_bytes'

Reporter

This issue was reported by 3 user(s):

Electron Cash Version	Python Version	Operating System	Wallet Type	Locale
4.0.2	3.7.8 (default, Oct 18 2020, 15:57:30) [GCC 9.3.0]	Linux-5.4.38-gentoo-x86_64-x86_64-Intel-R-_Core-TM-i5-6600_CPU@_3.30GHz-with-gentoo-2.7	imported_privkey	en_US
4.0.2	3.7.9 (default, Oct 20 2020, 12:20:36) [GCC 8.4.0]	Linux-5.8.18-gentoo-x86_64-x86_64-Intel-R-_Core-TM-i9-10980XE_CPU@_3.00GHz-with-gentoo-2.7	standard	en_GB
4.0.2	3.7.9 (default, Oct 20 2020, 12:20:36) [GCC 8.4.0]	Linux-5.8.18-gentoo-x86_64-x86_64-Intel-R-_Core-TM-i9-10980XE_CPU@_3.00GHz-with-gentoo-2.7	standard	en_GB

Additional Information

The reporting user(s) did not provide additional information.

[cculianu]

This has been fixed in newer Electron Cash post 4.1.1.