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sweep: factor out method GetSweepFeeDetails

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It was factored out from GetSweepFee method. It provides fee rate
and weight in addition to absolute fee.
This commit is contained in:
Boris Nagaev 2024-06-21 14:00:32 -03:00
parent 0ec63a61d4
commit 84ae3667d5
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1 changed files with 23 additions and 5 deletions
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28
sweep/sweeper.go
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@ -14,6 +14,8 @@ import (
"github.com/lightninglabs/loop/swap"
"github.com/lightningnetwork/lnd/input"
"github.com/lightningnetwork/lnd/keychain"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwallet/chainfee"
)
// Sweeper creates htlc sweep txes.
@ -181,10 +183,26 @@ func (s *Sweeper) GetSweepFee(ctx context.Context,
destAddr btcutil.Address, sweepConfTarget int32) (
btcutil.Amount, error) {
// Use GetSweepFeeDetails to get the fee and other unused data.
fee, _, _, err := s.GetSweepFeeDetails(
ctx, addInputEstimate, destAddr, sweepConfTarget,
)
return fee, err
}
// GetSweepFee calculates the required tx fee to spend to P2WKH. It takes a
// function that is expected to add the weight of the input to the weight
// estimator. It returns also the fee rate and transaction weight.
func (s *Sweeper) GetSweepFeeDetails(ctx context.Context,
addInputEstimate func(*input.TxWeightEstimator) error,
destAddr btcutil.Address, sweepConfTarget int32) (
btcutil.Amount, chainfee.SatPerKWeight, lntypes.WeightUnit, error) {
// Get fee estimate from lnd.
feeRate, err := s.Lnd.WalletKit.EstimateFeeRate(ctx, sweepConfTarget)
if err != nil {
return 0, fmt.Errorf("estimate fee: %v", err)
return 0, 0, 0, fmt.Errorf("estimate fee: %v", err)
}
// Calculate weight for this tx.
@ -206,16 +224,16 @@ func (s *Sweeper) GetSweepFee(ctx context.Context,
weightEstimate.AddP2TROutput()
default:
return 0, fmt.Errorf("estimate fee: unknown address type %T",
destAddr)
return 0, 0, 0, fmt.Errorf("estimate fee: unknown address "+
"type %T", destAddr)
}
err = addInputEstimate(&weightEstimate)
if err != nil {
return 0, err
return 0, 0, 0, err
}
weight := weightEstimate.Weight()
return feeRate.FeeForWeight(weight), nil
return feeRate.FeeForWeight(weight), feeRate, weight, nil
}