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coin_mvts: rewrite how onchain events are recorded, update tests

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The old model of coin movements attempted to compute fees etc and log
amounts, not utxos. This is not as robust, as multi-party opens and dual
funded channels make it hard to account for fees etc correctly.

Instead, we move towards a 'utxo' view of the onchain events. Every
event is either the creation or 'destruction' of a utxo. For cases where
the value of the utxo is not (fully) debited/credited to our account, we
also record the output_value. E.g. channel closings spend a utxo who's
entire value we may not own.

Since we're now tracking UTXOs onchain, we can now do more complex
assertions about the onchain footprint of them. The integration tests
have been updated to now use more 'chain aware' assertions about the
ending state.
This commit is contained in:
niftynei
2021-12-01 09:32:55 -06:00
committed by Rusty Russell
parent 07039fc2b4
commit d2c4d4aec2
16 changed files with 1056 additions and 667 deletions
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5
tests/test_connection.py
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@@ -1101,12 +1101,11 @@ def test_funding_push(node_factory, bitcoind, chainparams):
assert funds['channel_sat'] + push_sat == funds['channel_total_sat']
chanid = first_channel_id(l2, l1)
l1.daemon.wait_for_log('coins account: {}'.format(chanid))
# give the file write a second
time.sleep(1)
channel_mvts = [
{'type': 'chain_mvt', 'credit': 0, 'debit': 20000000, 'tag': 'pushed'},
{'type': 'chain_mvt', 'credit': 16777215000, 'debit': 0, 'tag': 'deposit'},
{'type': 'chain_mvt', 'credit': 16777215000, 'debit': 0, 'tag': 'channel_open'},
{'type': 'channel_mvt', 'credit': 0, 'debit': 20000000, 'tag': 'pushed'},
]
check_coin_moves(l1, chanid, channel_mvts, chainparams)
assert account_balance(l1, chanid) == (amount - push_sat) * 1000