lnd.xprv/htlcswitch/payment_result.go

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package htlcswitch
import (
"errors"
"github.com/lightningnetwork/lnd/lnwire"
)
var (
// ErrPaymentIDNotFound is an error returned if the given paymentID is
// not found.
ErrPaymentIDNotFound = errors.New("paymentID not found")
// ErrPaymentIDAlreadyExists is returned if we try to write a pending
// payment whose paymentID already exists.
ErrPaymentIDAlreadyExists = errors.New("paymentID already exists")
)
// PaymentResult wraps a decoded result received from the network after a
// payment attempt was made. This is what is eventually handed to the router
// for processing.
type PaymentResult struct {
// Preimage is set by the switch in case a sent HTLC was settled.
Preimage [32]byte
// Error is non-nil in case a HTLC send failed, and the HTLC is now
// irrevocably cancelled. If the payment failed during forwarding, this
// error will be a *ForwardingError.
Error error
}
// networkResult is the raw result received from the network after a payment
// attempt has been made. Since the switch doesn't always have the necessary
// data to decode the raw message, we store it together with some meta data,
// and decode it when the router query for the final result.
type networkResult struct {
// msg is the received result. This should be of type UpdateFulfillHTLC
// or UpdateFailHTLC.
msg lnwire.Message
// unencrypted indicates whether the failure encoded in the message is
// unencrypted, and hence doesn't need to be decrypted.
unencrypted bool
// isResolution indicates whether this is a resolution message, in
// which the failure reason might not be included.
isResolution bool
}