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htlcswitch: add new ExtraMsg field to ForwardingError

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This commit adds a new field to the ForwardingError struct: ExtraMsg.
The purpose of this field is to allow the htlcswitch to tack on
additional error context to ForwardingError messages returned to the L3
router.
This commit is contained in:
Olaoluwa Osuntokun 2017-10-16 18:15:46 -07:00
parent b29a73a0dd
commit 51d04e8922
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1 changed files with 16 additions and 0 deletions
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16
htlcswitch/failure.go
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@ -2,6 +2,7 @@ package htlcswitch
import (
"bytes"
"fmt"
"github.com/lightningnetwork/lightning-onion"
"github.com/lightningnetwork/lnd/lnwire"
@ -16,9 +17,24 @@ type ForwardingError struct {
// of candidate routes in response to the type of error extracted.
ErrorSource *btcec.PublicKey
// ExtraMsg is an additional error message that callers can provide in
// order to provide context specific error details.
ExtraMsg string
lnwire.FailureMessage
}
// Error implements the built-in error interface. We use this method to allow
// the switch or any callers to insert additional context to the error message
// returned.
func (f *ForwardingError) Error() string {
if f.ExtraMsg == "" {
return f.FailureMessage.Error()
}
return fmt.Sprintf("%v: %v", f.FailureMessage.Error(), f.ExtraMsg)
}
// ErrorDecrypter is an interface that is used to decrypt the onion encrypted
// failure reason an extra out a well formed error.
type ErrorDecrypter interface {