fix: make currency optional in transfer (#654)

* fix: make currency optional in transfer

* conflict

Author: arcoraven

src/server/routes/backend-wallet/transfer.ts

@@ -1,5 +1,4 @@
 import { Static, Type } from "@sinclair/typebox";
-import { constants } from "ethers";
 import { FastifyInstance } from "fastify";
 import { StatusCodes } from "http-status-codes";
 import {
@@ -38,12 +37,12 @@ const requestBodySchema = Type.Object({
     ...AddressSchema,
     description: "The recipient wallet address.",
   },
-  currencyAddress: {
+  currencyAddress: Type.Optional({
     ...AddressSchema,
     examples: [constants.AddressZero],
     description:
       "The token address to transfer. Omit to transfer the chain's native currency (e.g. ETH on Ethereum).",
-  },
+  }),
   amount: Type.String({
     description:
       'The amount in ether to transfer. Example: "0.1" to send 0.1 ETH.',
@@ -80,7 +79,7 @@ export async function transfer(fastify: FastifyInstance) {
       const {
         to,
         amount,
-        currencyAddress: _currencyAddress,
+        currencyAddress: _currencyAddress = ZERO_ADDRESS,
         txOverrides,
       } = request.body;
       const {