feat(transaction-pay-controller): add generic non-atomic post-Relay flow via atomic and recipient

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]
 
+### Added
+
+- Add `atomic` field on `TransactionConfig` / `TransactionData` for a generic non-atomic post-Relay flow: when `atomic` is `false`, Relay bridges to an internally derived recipient (`getPaymentOverrideData` recipient for post-quote flows, otherwise the transaction's own `from`) and the second leg is submitted separately after completion, replacing the removed `relay-post-ma-vault` module ([#9497](https://github.com/MetaMask/core/pull/9497))
+
 ### Changed
 
 - Bump `@metamask/ramps-controller` from `^17.0.0` to `^17.1.0` ([#9646](https://github.com/MetaMask/core/pull/9646))

packages/transaction-pay-controller/src/TransactionPayController.ts

@@ -17,6 +17,7 @@ import type {
   GetDelegationTransactionCallback,
   GetPaymentOverrideDataCallback,
   PolymarketCallbacks,
+  TransactionConfig,
   TransactionConfigCallback,
   TransactionData,
   TransactionPayControllerMessenger,
@@ -148,30 +149,23 @@ export class TransactionPayController extends BaseController<
     callback: TransactionConfigCallback,
   ): void {
     this.#updateTransactionData(transactionId, (transactionData) => {
-      const config = {
-        isMaxAmount: transactionData.isMaxAmount,
-        isPostQuote: transactionData.isPostQuote,
+      const config: TransactionConfig = {
+        accountOverride: transactionData.accountOverride,
+        atomic: transactionData.atomic,
         isHyperliquidSource: transactionData.isHyperliquidSource,
+        isMaxAmount: transactionData.isMaxAmount,
         isPolymarketDepositWallet: transactionData.isPolymarketDepositWallet,
+        isPostQuote: transactionData.isPostQuote,
         isQuoteRequired: transactionData.isQuoteRequired,
-        refundTo: transactionData.refundTo,
-        accountOverride: transactionData.accountOverride,
         paymentOverride: transactionData.paymentOverride,
+        refundTo: transactionData.refundTo,
       };
 
       const previousAccountOverride = config.accountOverride;
 
       callback(config);
 
-      transactionData.accountOverride = config.accountOverride;
-      transactionData.isMaxAmount = config.isMaxAmount;
-      transactionData.isPostQuote = config.isPostQuote;
-      transactionData.isHyperliquidSource = config.isHyperliquidSource;
-      transactionData.isPolymarketDepositWallet =
-        config.isPolymarketDepositWallet;
-      transactionData.isQuoteRequired = config.isQuoteRequired;
-      transactionData.refundTo = config.refundTo;
-      transactionData.paymentOverride = config.paymentOverride;
+      Object.assign(transactionData, config);
 
       if (
         !config.isPostQuote &&