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staticaddr: configurable max htlc tx fee

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In this commit we introduce maximum fee percentages
for the static loop-in htlc transactions. Since
the server has the ability to publish htlc transactions
without settling the swap payment we have to restrict
the amount the server allocates for fees of these
transactions.
This commit is contained in:
Slyghtning 2024-10-17 13:29:43 +02:00
parent 4d8c258671
commit f3ec81fb68
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3 changed files with 55 additions and 30 deletions
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16
client.go
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@ -141,6 +141,22 @@ type ClientConfig struct {
// MaxPaymentRetries is the maximum times we retry an off-chain payment
// (used in loop out).
MaxPaymentRetries int
// MaxStaticAddrHtlcFeePercentage is the percentage of the swap amount
// that we allow the server to charge for the htlc transaction.
// Although highly unlikely, this is a defense against the server
// publishing the htlc without paying the swap invoice, forcing us to
// sweep the timeout path.
MaxStaticAddrHtlcFeePercentage float64
// MaxStaticAddrHtlcBackupFeePercentage is the percentage of the swap
// amount that we allow the server to charge for the htlc backup
// transactions. This is a defense against the server publishing the
// htlc backup without paying the swap invoice, forcing us to sweep the
// timeout path. This value is elevated compared to
// MaxStaticAddrHtlcFeePercentage since it serves the server as backup
// transaction in case of fee spikes.
MaxStaticAddrHtlcBackupFeePercentage float64
}
// NewClient returns a new instance to initiate swaps with.