if there are no checkpoints and the split is very old, the exponential backward search might undershoot so that it asks for the genesis block but 0 and None are not distinguished hence the fork detection logic fails
there was some kind of re-org but our reorged transactions did not get into the server's mempool for some reason (and they were not mined either). the synchronizer detected the change in address status and asked for the new address histories but in `on_address_history` it thought it did not ask for the histories.
from log:
[Synchronizer] receiving history (unsolicited) 2N6DydVfmheVM9F94G46pcUi5piyffgNBQ9 0
[Synchronizer] receiving history (unsolicited) 2Mw6LDQUzmmxCX3wouDXo2Pj4wbonJATays 0
[SPV] received an error: {'jsonrpc': '2.0', 'error': {'code': 1, 'message': 'tx hash f7c89eec3454b627dcb8cfc822202a0d1f8b38f2a53db182b607a2f61e6946d1 not in block 000000007ac4e95633a16232bea35bc17edf855e3964dff0ebb108b5887647ff at height 1,325,443'}, 'id': 120, 'method': 'blockchain.transaction.get_merkle', 'params': ['f7c89eec3454b627dcb8cfc822202a0d1f8b38f2a53db182b607a2f61e6946d1', 1325443]}
Traceback (most recent call last):
File "...\electrum\gui\qt\util.py", line 645, in run
result = task.task()
File "...\electrum\lib\wallet.py", line 1500, in sign_transaction
k.sign_transaction(tx, password)
File "...\electrum\plugins\keepkey\keepkey.py", line 67, in sign_transaction
self.plugin.sign_transaction(self, tx, prev_tx, xpub_path)
File "...\electrum\plugins\keepkey\keepkey.py", line 263, in sign_transaction
tx.update_signatures(signatures)
File "...\electrum\lib\transaction.py", line 667, in update_signatures
public_key = ecc.ECPubkey.from_sig_string(sig_string, recid, pre_hash)
File "...\electrum\lib\ecc.py", line 180, in from_sig_string
ecdsa_verifying_key = _MyVerifyingKey.from_signature(sig_string, recid, msg_hash, curve=SECP256k1)
File "...\electrum\lib\ecc.py", line 152, in from_signature
Q = inv_r * ( s * R + minus_e * G )
File "...\Python\Python36-32\lib\site-packages\ecdsa\ellipticcurve.py", line 143, in __rmul__
return self * other
File "...\electrum\lib\ecc_fast.py", line 120, in mul
public_pair_bytes = b'\4' + self.x().to_bytes(32, byteorder="big") + self.y().to_bytes(32, byteorder="big")
OverflowError: int too big to convert
