feat(selector): implement absolute fee targeting strategy #31
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Approach ACK ACK b6fc87d |
ValuedMammal
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Dec 17, 2025
ValuedMammal
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…hangePolicy` b04db7e refactor(selector): Rename `FeeTarget` to `FeeStrategy` (valued mammal) 33e7a68 example: Rename change_weights to drain_weights (valued mammal) 0cda404 selector!: Remove `SelectorParams::change_weight` (valued mammal) 827cb70 selector!: Swap `ChangePolicyType` for `bdk_coin_select::ChangePolicy` (valued mammal) bfa2bea example: Fix change spend weight (valued mammal) b6fc87d feat(selector): implement absolute fee targeting strategy (Abiodun) Pull request description: ## Description Fix #29 by removing `ChangePolicyType` from `SelectorParams` in favor of `bdk_coin_select::ChangePolicy`. The idea is that this affords maximum flexibility when defining the change policy. Builds on #31 which implements absolute fee targeting. h/t aagbotemi. A test `test_absolute_fee_vs_feerate_target_value` is added that checks the expected `Target` is constructed based on the chosen `FeeStrategy`. ## Changelog ### Added - selector: Added `FeeStrategy` enum which defines the fee target as either a feerate or fee amount. ### Changed **BREAKING** - `SelectorParams::target_feerate` field is changed to `fee_strategy`. - `SelectorParams::change_policy` field is changed to have type `bdk_coin_select::ChangePolicy`. - `SelectorParams::new` is changed to accept the `fee_strategy` and `change_policy` as inputs. ### Removed - `SelectorParams::change_weight` field is removed now that the change weights are represented in the actual change policy. - Removed `SelectorParams::to_cs_change_policy` as the conversion is no longer necessary. - Removed `ChangePolicyType` enum to allow the user to construct the intended `ChangePolicy`. ACKs for top commit: aagbotemi: ACK b04db7e Tree-SHA512: 8c4ca2c80c9bb10381a63f34a2fd18f0e75cea343cc0161439d4eb3e0d3ec8a8f252ea35914151fef5b5b21acbafcd856e1b36d88bd084f003225fe770ce6611
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Description
This PR Implements
FeeTarget::AbsoluteFeeto allow users to specify exact fee amounts instead of fee rates. This PR fixes #26Note to the reviewers
The
AbsoluteFeevariant works by adding the fee amount to the target output value sum and setting the fee rate to ZERO.All Submissions: