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Set min anchor channel fee to 1 sat/vbyte #1223

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Jun 17, 2024
Merged

Set min anchor channel fee to 1 sat/vbyte #1223

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13 changes: 12 additions & 1 deletion mutiny-core/src/fees.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -190,6 +190,7 @@ impl<S: MutinyStorage> FeeEstimator for MutinyFeeEstimator<S> {
// any post processing we do after we get the fee rate from the cache
match confirmation_target {
ConfirmationTarget::MinAllowedNonAnchorChannelRemoteFee => fee - 250, // helps with rounding errors
ConfirmationTarget::MinAllowedAnchorChannelRemoteFee => 250, // just pin to 1 sat/vbyte to prevent force closes
ConfirmationTarget::AnchorChannelFee => (fee / 2).max(250), // do half the mempool minimum just to prevent force closes
_ => fee,
}
Expand All @@ -209,7 +210,7 @@ fn num_blocks_from_conf_target(confirmation_target: ConfirmationTarget) -> usize

fn fallback_fee_from_conf_target(confirmation_target: ConfirmationTarget) -> u32 {
match confirmation_target {
ConfirmationTarget::MinAllowedAnchorChannelRemoteFee => 3 * 250,
ConfirmationTarget::MinAllowedAnchorChannelRemoteFee => 250,
ConfirmationTarget::MinAllowedNonAnchorChannelRemoteFee => 3 * 250,
ConfirmationTarget::ChannelCloseMinimum => 10 * 250,
ConfirmationTarget::AnchorChannelFee => 10 * 250,
Expand Down Expand Up @@ -321,6 +322,16 @@ mod test {
fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::OnChainSweep),
12_500
);

// test post-processing
assert_eq!(
fee_estimator
.get_est_sat_per_1000_weight(ConfirmationTarget::MinAllowedAnchorChannelRemoteFee),
250
);
assert!(
fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::AnchorChannelFee) >= 250
);
}

#[cfg(not(target_arch = "wasm32"))]
Expand Down
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