fix(core): add lnd FeeInsufficient error validation

core/api/src/domain/bitcoin/lightning/errors.ts

@@ -39,6 +39,7 @@ export class RouteNotFoundError extends LightningServiceError {}
 export class UnknownNextPeerError extends LightningServiceError {}
 export class InsufficientBalanceForRoutingError extends LightningServiceError {}
 export class InsufficientBalanceForLnPaymentError extends LightningServiceError {}
+export class InsufficientFeeForLnPaymentError extends LightningServiceError {}
 export class InvoiceExpiredOrBadPaymentHashError extends LightningServiceError {}
 export class PaymentRejectedByDestinationError extends LightningServiceError {}
 export class PaymentAttemptsTimedOutError extends LightningServiceError {}

core/api/src/graphql/error-map.ts

@@ -407,6 +407,11 @@ export const mapError = (error: ApplicationError): CustomGraphQLError => {
       message = error.message
       return new InsufficientBalanceError({ message, logger: baseLogger })
 
+    case "InsufficientFeeForLnPaymentError":
+      message =
+        "Payment failed due to an insufficient fee, please try again later or contact support if the problem persists."
+      return new ValidationInternalError({ message, logger: baseLogger })
+
     case "CaptchaUserFailToPassError":
       message = "Captcha validation failed."
       return new ValidationInternalError({ message, logger: baseLogger })

core/api/src/services/lnd/errors.ts

@@ -2,6 +2,7 @@ export const KnownLndErrorDetails = {
   // Off-chain
   InsufficientBalance: /insufficient local balance/,
   InsufficientBalanceToAttemptPayment: /InsufficientBalanceToAttemptPayment/,
+  InsufficientFee: /FeeInsufficient/,
   InvoiceNotFound: /unable to locate invoice/,
   InvoiceAlreadyPaid: /invoice is already paid/,
   UnableToFindRoute: /PaymentPathfindingFailedToFindPossibleRoute/,

core/api/src/services/lnd/index.ts

@@ -78,6 +78,7 @@ import {
   decodeInvoice,
   InvalidInvoiceAmountError,
   InvoiceAlreadySettledError,
+  InsufficientFeeForLnPaymentError,
 } from "@/domain/bitcoin/lightning"
 import { CacheKeys } from "@/domain/cache"
 import { LnFees } from "@/domain/payments"
@@ -1208,6 +1209,8 @@ const handleSendPaymentLndErrors = ({
       return new InsufficientBalanceForLnPaymentError()
     case match(KnownLndErrorDetails.FeaturePairExists):
       return new InvalidFeatureBitsForLndInvoiceError()
+    case match(KnownLndErrorDetails.InsufficientFee):
+      return new InsufficientFeeForLnPaymentError()
 
     default:
       return handleCommonLightningServiceErrors(err)