57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
package lnrpc
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import (
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"errors"
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"github.com/btcsuite/btcutil"
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"github.com/lightningnetwork/lnd/lnwire"
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)
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var (
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// ErrSatMsatMutualExclusive is returned when both a sat and an msat
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// amount are set.
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ErrSatMsatMutualExclusive = errors.New(
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"sat and msat arguments are mutually exclusive",
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)
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)
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// CalculateFeeLimit returns the fee limit in millisatoshis. If a percentage
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// based fee limit has been requested, we'll factor in the ratio provided with
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// the amount of the payment.
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func CalculateFeeLimit(feeLimit *FeeLimit,
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amount lnwire.MilliSatoshi) lnwire.MilliSatoshi {
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switch feeLimit.GetLimit().(type) {
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case *FeeLimit_Fixed:
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return lnwire.NewMSatFromSatoshis(
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btcutil.Amount(feeLimit.GetFixed()),
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)
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case *FeeLimit_FixedMsat:
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return lnwire.MilliSatoshi(feeLimit.GetFixedMsat())
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case *FeeLimit_Percent:
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return amount * lnwire.MilliSatoshi(feeLimit.GetPercent()) / 100
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default:
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// If a fee limit was not specified, we'll use the payment's
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// amount as an upper bound in order to avoid payment attempts
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// from incurring fees higher than the payment amount itself.
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return amount
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}
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}
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// UnmarshallAmt returns a strong msat type for a sat/msat pair of rpc fields.
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func UnmarshallAmt(amtSat, amtMsat int64) (lnwire.MilliSatoshi, error) {
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if amtSat != 0 && amtMsat != 0 {
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return 0, ErrSatMsatMutualExclusive
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}
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if amtSat != 0 {
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return lnwire.NewMSatFromSatoshis(btcutil.Amount(amtSat)), nil
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}
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return lnwire.MilliSatoshi(amtMsat), nil
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}
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