Not needed since aee2d8e120
And was never really working I guess (race..)
Also, during normal initial history sync, it caused the verifier to request
proofs multiple times.
this is a performance optimisation.
measurements using a large wallet with 11k txns:
syncing XPUB for the first time takes 10 seconds. leaving window open, and
syncing same XPUB again in new window takes 30 seconds. in third window,
it takes ~50 seconds. then ~70s. presumably scaling linearly.
this is due to the history_list.update_item call being CPU-heavy.
now all of them take 10 seconds.
related: 41e088693d
If our guess of a txn getting confirmed at the same height in the new chain
as it was at in the old chain is incorrect, there is a race between the
verifier and the synchronizer. If the verifier wins, the exception will cause
us to disconnect.
is_mine: wallet expects get_address_index to work
imported wallets: history did not include addr keys after creation
deterministic wallets: get_addresses() should be sorted in derivation order
