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| author | Samuel Dobson <dobsonsa68@gmail.com> | 2021-09-01 16:33:13 +1200 |
|---|---|---|
| committer | Samuel Dobson <dobsonsa68@gmail.com> | 2021-09-01 16:59:13 +1200 |
| commit | 70676e40d8c6f025ab115e59324dadc5c49f2497 (patch) | |
| tree | 65a8f8004ef53e15e21c62e305ce0faa965cf8ea /.cirrus.yml | |
| parent | a820e79512b67b1bfda20bdc32b47086d2b0910d (diff) | |
| parent | 86beee05795216738f51fa744539336503c26fd9 (diff) | |
Merge bitcoin/bitcoin#22009: wallet: Decide which coin selection solution to use based on waste metric
86beee05795216738f51fa744539336503c26fd9 Use waste metric for deciding which selection to use (Andrew Chow)
b3df0caf7c291a316298e54e73426c765e61c129 tests: Test GetSelectionWaste (Andrew Chow)
4f5ad43b1e05cd7b403f87aae4c4d42e5aea810b Add waste metric calculation function (Andrew Chow)
935b3ddf72aa390087684e03166c707f5b173434 scripted-diff: tests: Use KnapsackSolver directly (Andrew Chow)
6a023a6f904efe38dacd662d919aba74f066b1dc tests: Add KnapsackGroupOutputs helper function (Andrew Chow)
d5069fc1aa7d335f3043227f843cbb9d8ba1507b tests: Use SelectCoinsBnB directly instead of AttemptSelection (Andrew Chow)
54de7b47463d98f860167d4e0b7e4ebb3926b59c Allow the long term feerate to be configured, default of 10 sat/vb (Andrew Chow)
Pull request description:
Branch and Bound introduced a metric that we call waste. This metric is used as part of bounding the search tree, but it can be generalized to all coin selection solutions, including those with change. As such, this PR introduces the waste metric at a higher level so that we can run both of our coin selection algorithms (BnB and KnapsackSolver) and choose the one which has the least waste. In the event that both find a solution with the same change, we choose the one that spends more inputs.
Also this PR sets the long term feerate to 10 sat/vb rather than using the 1008 block estimate. This allows the long term feerate to be the feerate that we switch between consolidating and optimizing for fees. This also removes a bug where the long term feerate would incorrectly be set to the fallback fee. While this doesn't matter prior to this PR, it does have an effect following this. The long term feerate can be configured by the user through a new `-consolidatefeerate` option.
ACKs for top commit:
Xekyo:
reACK 86beee0 via git range-diff fe47558...86beee0
meshcollider:
re-utACK 86beee05795216738f51fa744539336503c26fd9
Tree-SHA512: 54b154b346538eca68ae2a3b83a033b495c1605c14f842bfc43ded2256b110983ce674c647fe753cf0305b1b178403d8d60d6d4203c7a712bec784be52e90d42
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