feat: Implement FiatStrategy and getQuotes functionality

packages/transaction-pay-controller/CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - **BREAKING:** Add `AssetsControllerGetStateForTransactionPayAction` to the `AllowedActions` messenger type ([#8163](https://github.com/MetaMask/core/pull/8163))
+- Add MMPay `FiatStrategy` quotes flow ([#8121](https://github.com/MetaMask/core/pull/8121))
 
 ### Changed
 

packages/transaction-pay-controller/package.json

@@ -61,6 +61,7 @@
     "@metamask/messenger": "^0.3.0",
     "@metamask/metamask-eth-abis": "^3.1.1",
     "@metamask/network-controller": "^30.0.0",
+    "@metamask/ramps-controller": "^12.0.0",
     "@metamask/remote-feature-flag-controller": "^4.1.0",
     "@metamask/transaction-controller": "^62.21.0",
     "@metamask/utils": "^11.9.0",

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

@@ -1,3 +1,4 @@
+import { TransactionType } from '@metamask/transaction-controller';
 import type { Hex } from '@metamask/utils';
 
 export const CONTROLLER_NAME = 'TransactionPayController';
@@ -14,6 +15,36 @@ export const ARBITRUM_USDC_ADDRESS =
 export const POLYGON_USDCE_ADDRESS =
   '0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174' as Hex;
 
+export type TransactionPayFiatAsset = {
+  address: Hex;
+  caipAssetId: string;
+  chainId: Hex;
+  decimals: number;
+};
+
+const POLYGON_POL_FIAT_ASSET: TransactionPayFiatAsset = {
+  address: '0x0000000000000000000000000000000000001010',
+  caipAssetId: 'eip155:137/slip44:966',
+  chainId: CHAIN_ID_POLYGON,
+  decimals: 18,
+};
+
+const ARBITRUM_ETH_FIAT_ASSET: TransactionPayFiatAsset = {
+  address: NATIVE_TOKEN_ADDRESS,
+  caipAssetId: 'eip155:42161/slip44:60',
+  chainId: CHAIN_ID_ARBITRUM,
+  decimals: 18,
+};
+
+// We might use feature flags to determine these later.
+export const MMPAY_FIAT_ASSET_ID_BY_TX_TYPE: Partial<
+  Record<TransactionType, TransactionPayFiatAsset>
+> = {
+  [TransactionType.predictDeposit]: POLYGON_POL_FIAT_ASSET,
+  [TransactionType.perpsDeposit]: ARBITRUM_ETH_FIAT_ASSET,
+  [TransactionType.perpsDepositAndOrder]: ARBITRUM_ETH_FIAT_ASSET,
+};
+
 export const STABLECOINS: Record<Hex, Hex[]> = {
   // Mainnet
   '0x1': [
@@ -35,6 +66,7 @@ export const STABLECOINS: Record<Hex, Hex[]> = {
 export enum TransactionPayStrategy {
   Across = 'across',
   Bridge = 'bridge',
+  Fiat = 'fiat',
   Relay = 'relay',
   Test = 'test',
 }

packages/transaction-pay-controller/src/strategy/fiat/FiatStrategy.test.ts

@@ -0,0 +1,53 @@
+import type { TransactionMeta } from '@metamask/transaction-controller';
+
+import { getFiatQuotes } from './fiat-quotes';
+import { submitFiatQuotes } from './fiat-submit';
+import { FiatStrategy } from './FiatStrategy';
+import type { FiatOriginalQuote } from './types';
+import type { TransactionPayControllerMessenger } from '../..';
+import type { TransactionPayQuote } from '../../types';
+
+jest.mock('./fiat-quotes');
+jest.mock('./fiat-submit');
+
+const QUOTE_MOCK = {
+  estimatedDuration: 5,
+} as TransactionPayQuote<FiatOriginalQuote>;
+
+describe('FiatStrategy', () => {
+  const getFiatQuotesMock = jest.mocked(getFiatQuotes);
+  const submitFiatQuotesMock = jest.mocked(submitFiatQuotes);
+
+  beforeEach(() => {
+    jest.resetAllMocks();
+    getFiatQuotesMock.mockResolvedValue([QUOTE_MOCK]);
+  });
+
+  describe('getQuotes', () => {
+    it('returns result from util', async () => {
+      const result = new FiatStrategy().getQuotes({
+        messenger: {} as TransactionPayControllerMessenger,
+        requests: [],
+        transaction: {} as TransactionMeta,
+      });
+
+      expect(await result).toStrictEqual([QUOTE_MOCK]);
+    });
+  });
+
+  describe('execute', () => {
+    it('calls util', async () => {
+      await new FiatStrategy().execute({
+        isSmartTransaction: () => false,
+        quotes: [QUOTE_MOCK],
+        messenger: {} as TransactionPayControllerMessenger,
+        transaction: { txParams: { from: '0x1' } } as TransactionMeta,
+      });
+
+      expect(submitFiatQuotesMock).toHaveBeenCalledTimes(1);
+      expect(
+        submitFiatQuotesMock.mock.calls[0][0].transaction.txParams.from,
+      ).toBe('0x1');
+    });
+  });
+});

packages/transaction-pay-controller/src/strategy/fiat/FiatStrategy.ts

@@ -0,0 +1,23 @@
+import { getFiatQuotes } from './fiat-quotes';
+import { submitFiatQuotes } from './fiat-submit';
+import type { FiatOriginalQuote } from './types';
+import type {
+  PayStrategy,
+  PayStrategyExecuteRequest,
+  PayStrategyGetQuotesRequest,
+  TransactionPayQuote,
+} from '../../types';
+
+export class FiatStrategy implements PayStrategy<FiatOriginalQuote> {
+  async getQuotes(
+    request: PayStrategyGetQuotesRequest,
+  ): Promise<TransactionPayQuote<FiatOriginalQuote>[]> {
+    return getFiatQuotes(request);
+  }
+
+  async execute(
+    request: PayStrategyExecuteRequest<FiatOriginalQuote>,
+  ): ReturnType<PayStrategy<FiatOriginalQuote>['execute']> {
+    return await submitFiatQuotes(request);
+  }
+}