fix: relay transaction fees

packages/transaction-pay-controller/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Read Relay provider fees directly from response ([#7098](https://github.com/MetaMask/core/pull/7098))
+
 ## [4.0.0]
 
 ### Added

packages/transaction-pay-controller/src/strategy/relay/relay-quotes.test.ts

@@ -37,9 +37,6 @@ const QUOTE_REQUEST_MOCK: QuoteRequest = {
 
 const QUOTE_MOCK = {
   details: {
-    currencyIn: {
-      amountUsd: '2.34',
-    },
     currencyOut: {
       amountFormatted: '1.0',
       amountUsd: '1.23',
@@ -51,8 +48,8 @@ const QUOTE_MOCK = {
     timeEstimate: 300,
   },
   fees: {
-    gas: {
-      amountUsd: '3.45',
+    relayer: {
+      amountUsd: '1.11',
     },
   },
   steps: [

packages/transaction-pay-controller/src/strategy/relay/relay-quotes.ts

@@ -164,8 +164,7 @@ function normalizeQuote(
   fullRequest: PayStrategyGetQuotesRequest,
 ): TransactionPayQuote<RelayQuote> {
   const { messenger, transaction } = fullRequest;
-  const { details } = quote;
-  const { currencyIn, currencyOut } = details;
+  const { details, fees } = quote;
 
   const { usdToFiatRate } = getFiatRates(messenger, request);
 
@@ -175,7 +174,7 @@ function normalizeQuote(
   );
 
   const provider = getFiatValueFromUsd(
-    new BigNumber(currencyIn.amountUsd).minus(currencyOut.amountUsd),
+    new BigNumber(fees.relayer.amountUsd),
     usdToFiatRate,
   );
 

packages/transaction-pay-controller/src/strategy/relay/types.ts

@@ -2,9 +2,6 @@ import type { Hex } from '@metamask/utils';
 
 export type RelayQuote = {
   details: {
-    currencyIn: {
-      amountUsd: string;
-    };
     currencyOut: {
       amountFormatted: string;
       amountUsd: string;
@@ -16,7 +13,7 @@ export type RelayQuote = {
     timeEstimate: number;
   };
   fees: {
-    gas: {
+    relayer: {
       amountUsd: string;
     };
   };