feat(express): migrated wallet sweep to type route

Ticket: WP-5432

Author: lokesh-bitgo

modules/express/src/clientRoutes.ts

@@ -830,10 +830,10 @@ async function handleV2FanOutUnspents(req: ExpressApiRouteRequest<'express.v2.wa
  * handle wallet sweep
  * @param req
  */
-async function handleV2Sweep(req: express.Request) {
+async function handleV2Sweep(req: ExpressApiRouteRequest<'express.v2.wallet.sweep', 'post'>) {
   const bitgo = req.bitgo;
-  const coin = bitgo.coin(req.params.coin);
-  const wallet = await coin.wallets().get({ id: req.params.id });
+  const coin = bitgo.coin(req.decoded.coin);
+  const wallet = await coin.wallets().get({ id: req.decoded.id });
   return wallet.sweep(createSendParams(req));
 }
 
@@ -1667,7 +1667,7 @@ export function setupAPIRoutes(app: express.Application, config: Config): void {
   ]);
   router.post('express.v2.wallet.fanoutunspents', [prepareBitGo(config), typedPromiseWrapper(handleV2FanOutUnspents)]);
 
-  app.post('/api/v2/:coin/wallet/:id/sweep', parseBody, prepareBitGo(config), promiseWrapper(handleV2Sweep));
+  router.post('express.v2.wallet.sweep', [prepareBitGo(config), typedPromiseWrapper(handleV2Sweep)]);
 
   // CPFP
   app.post(

modules/express/src/typedRoutes/api/index.ts

@@ -46,6 +46,7 @@ import { PostLightningWalletWithdraw } from './v2/lightningWithdraw';
 import { PutV2PendingApproval } from './v2/pendingApproval';
 import { PostConsolidateAccount } from './v2/consolidateAccount';
 import { PostCanonicalAddress } from './v2/canonicalAddress';
+import { PostWalletSweep } from './v2/walletSweep';
 
 // Too large types can cause the following error
 //
@@ -290,6 +291,12 @@ export const ExpressV2CanonicalAddressApiSpec = apiSpec({
   },
 });
 
+export const ExpressV2WalletSweepApiSpec = apiSpec({
+  'express.v2.wallet.sweep': {
+    post: PostWalletSweep,
+  },
+});
+
 export type ExpressApi = typeof ExpressPingApiSpec &
   typeof ExpressPingExpressApiSpec &
   typeof ExpressLoginApiSpec &
@@ -324,6 +331,7 @@ export type ExpressApi = typeof ExpressPingApiSpec &
   typeof ExpressExternalSigningApiSpec &
   typeof ExpressWalletSigningApiSpec &
   typeof ExpressV2CanonicalAddressApiSpec &
+  typeof ExpressV2WalletSweepApiSpec &
   typeof ExpressWalletManagementApiSpec;
 
 export const ExpressApi: ExpressApi = {
@@ -361,6 +369,7 @@ export const ExpressApi: ExpressApi = {
   ...ExpressExternalSigningApiSpec,
   ...ExpressWalletSigningApiSpec,
   ...ExpressV2CanonicalAddressApiSpec,
+  ...ExpressV2WalletSweepApiSpec,
   ...ExpressWalletManagementApiSpec,
 };
 

modules/express/src/typedRoutes/api/v2/walletSweep.ts

@@ -0,0 +1,102 @@
+import * as t from 'io-ts';
+import { httpRoute, httpRequest, optional } from '@api-ts/io-ts-http';
+import { BitgoExpressError } from '../../schemas/error';
+import { SendManyResponse } from './sendmany';
+
+/**
+ * Request path parameters for sweeping a wallet
+ */
+export const WalletSweepParams = {
+  /** The coin type */
+  coin: t.string,
+  /** The wallet ID */
+  id: t.string,
+} as const;
+
+/**
+ * Request body for sweeping all funds from a wallet
+ *
+ * The sweep operation sends all available funds from the wallet to a specified address.
+ * For UTXO coins, it uses the native /sweepWallet endpoint.
+ * For account-based coins, it calculates the maximum spendable amount and uses sendMany.
+ */
+export const WalletSweepBody = {
+  /** The destination address to send all funds to - REQUIRED */
+  address: t.string,
+
+  /** The wallet passphrase to decrypt the user key */
+  walletPassphrase: optional(t.string),
+
+  /** The extended private key (alternative to walletPassphrase) */
+  xprv: optional(t.string),
+
+  /** One-time password for 2FA */
+  otp: optional(t.string),
+
+  /** The desired fee rate for the transaction in satoshis/kB (UTXO coins) */
+  feeRate: optional(t.number),
+
+  /** Upper limit for fee rate in satoshis/kB (UTXO coins) */
+  maxFeeRate: optional(t.number),
+
+  /** Estimate fees to aim for confirmation within this number of blocks (UTXO coins) */
+  feeTxConfirmTarget: optional(t.number),
+
+  /** Allows sweeping 200 unspents when wallet has more than that (UTXO coins) */
+  allowPartialSweep: optional(t.boolean),
+
+  /** Transaction format: 'legacy', 'psbt', or 'psbt-lite' (UTXO coins) */
+  txFormat: optional(t.union([t.literal('legacy'), t.literal('psbt'), t.literal('psbt-lite')])),
+} as const;
+
+/**
+ * Sweep all funds from a wallet to a specified address
+ *
+ * This endpoint sweeps (sends) all available funds from a wallet to a single destination address.
+ *
+ * **Behavior by coin type:**
+ * - **UTXO coins (BTC, LTC, etc.)**: Uses the native /sweepWallet endpoint that:
+ *   - Collects all unspents in the wallet
+ *   - Builds a transaction sending everything (minus fees) to the destination
+ *   - Signs and broadcasts the transaction
+ *   - Validates that all funds go to the specified destination address
+ *
+ * - **Account-based coins (ETH, etc.)**:
+ *   - Checks for unconfirmed funds (fails if any exist)
+ *   - Queries the maximumSpendable amount
+ *   - Creates a sendMany transaction with that amount to the destination
+ *
+ * **Implementation Note:**
+ * Both execution paths (UTXO and account-based) ultimately call the same underlying
+ * transaction sending mechanisms as sendMany, resulting in identical response structures.
+ *
+ * **Authentication:**
+ * - Requires either `walletPassphrase` (to decrypt the encrypted user key) or `xprv` (raw private key)
+ * - Optional `otp` for 2FA
+ *
+ * **Fee control (UTXO coins):**
+ * - `feeRate`: Desired fee rate in satoshis/kB
+ * - `maxFeeRate`: Upper limit for fee rate
+ * - `feeTxConfirmTarget`: Target number of blocks for confirmation
+ *
+ * **Special options:**
+ * - `allowPartialSweep`: For UTXO wallets with >200 unspents, allows sweeping just 200
+ * - `txFormat`: Choose between 'legacy', 'psbt', or 'psbt-lite' format
+ *
+ * @tag express
+ * @operationId express.v2.wallet.sweep
+ */
+export const PostWalletSweep = httpRoute({
+  path: '/api/v2/{coin}/wallet/{id}/sweep',
+  method: 'POST',
+  request: httpRequest({
+    params: WalletSweepParams,
+    body: WalletSweepBody,
+  }),
+  response: {
+    /** Successfully swept funds - same structure as sendMany */
+    200: SendManyResponse,
+    /** Invalid request or sweep operation fails */
+    400: BitgoExpressError,
+  },
+});