feat(wallet): add TxBuilder::replace_tx
#1799
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- Add method `TxBuilder::previous_fee` for getting the previous feerate of the replaced tx
| // add previous fee | ||
| if let Ok(absolute) = self.wallet.calculate_fee(&tx) { | ||
| let rate = absolute / tx.weight(); | ||
| let previous_fee = PreviousFee { absolute, rate }; | ||
| self.params.bumping_fee = Some(previous_fee); | ||
| } |
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Should we still allow replacement if we can't determine the previous tx's fee/feerate?
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ConceptACK, ApproachACK.
Just need to make sure we don't use descendant outputs from tx we are trying to replace.
It's out of the scope of this PR, the inability to set both feerate/fee amount constraints together really bothers me. We should probably switch to the bdk_coin_select crate soon.
| // do not try to spend the outputs of the tx being replaced | ||
| self.params | ||
| .unspendable | ||
| .extend((0..tx.output.len()).map(|vout| OutPoint::new(txid, vout as u32))); |
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I think we also need to add the children outputs of the tx being replaced.
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Maybe one more test to make sure we don't use descendant outputs of the tx we are trying to replace.
| /// - If none of the inputs are owned by this wallet | ||
| /// | ||
| /// [`finish`]: TxBuilder::finish | ||
| pub fn replace_tx(&mut self, txid: Txid) -> Result<&mut Self, ReplaceTxError> { |
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Should probably warn that we don't help keep the original tx's recipient.
This PR adds a new method
TxBuilder::replace_txthat offers a simple way of creating replacements without relying on the mechanics ofbuild_fee_bump. See #1374 for context and motivating discussion.In summary, there are a few limitations with the current
build_fee_bump:In contrast
replace_txis useful when we only need to create a conflict and flexible enough to further tweak the parameters as desired.Notes to the reviewers
TxBuilder::add_utxosis modified to look for potentially spent outputs, provided that the builder is in a bump-fee context.1e9caf4 should probably be a separate patch.
Changelog notice
wallet: Added method
TxBuilder::replace_txChecklists
All Submissions:
cargo fmtandcargo clippybefore committingNew Features: