fix: Support missing 'function' prefix in functionName

src/server/routes/contract/write/write.ts

@@ -1,8 +1,8 @@
-import { type Static, Type } from "@sinclair/typebox";
+import { Type, type Static } from "@sinclair/typebox";
 import type { FastifyInstance } from "fastify";
 import { StatusCodes } from "http-status-codes";
 import { prepareContractCall, resolveMethod } from "thirdweb";
-import { type AbiFunction, parseAbiParams } from "thirdweb/utils";
+import { parseAbiParams, type AbiFunction } from "thirdweb/utils";
 import { getContractV5 } from "../../../../utils/cache/getContractv5";
 import { prettifyError } from "../../../../utils/error";
 import { queueTransaction } from "../../../../utils/transaction/queueTransation";
@@ -19,17 +19,26 @@ import {
   requiredAddress,
   walletWithAAHeaderSchema,
 } from "../../../schemas/wallet";
-import { sanitizeAbi } from "../../../utils/abi";
+import { sanitizeAbi, sanitizeFunctionName } from "../../../utils/abi";
 import { getChainIdFromChain } from "../../../utils/chain";
 import { parseTransactionOverrides } from "../../../utils/transactionOverrides";
 
 // INPUT
 const writeRequestBodySchema = Type.Object({
   functionName: Type.String({
-    description: "The function to call on the contract",
+    description: `The function to call on the contract. It is highly recommended to provide a full function signature, such as "function mintTo(address to, uint256 amount)", to avoid ambiguity and to skip ABI resolution.`,
+    examples: ["function mintTo(address to, uint256 amount)"],
   }),
   args: Type.Array(Type.Any(), {
-    description: "The arguments to call on the function",
+    description:
+      "An array of arguments to provide the function. Supports: numbers, strings, arrays, objects. Do not provide: BigNumber, bigint, Date objects",
+    examples: [
+      [
+        1730380951,
+        "0x09530565aC1Ce08C3621f5B24Fca6d9a76574620",
+        ["a", "b", "c"],
+      ],
+    ],
   }),
   ...txOverridesWithValueSchema.properties,
   abi: Type.Optional(abiArraySchema),
@@ -85,7 +94,8 @@ export async function writeToContract(fastify: FastifyInstance) {
       let method: AbiFunction;
       let params: Array<string | bigint | boolean | object>;
       try {
-        method = await resolveMethod(functionName)(contract);
+        const functionNameOrSignature = sanitizeFunctionName(functionName);
+        method = await resolveMethod(functionNameOrSignature)(contract);
         params = parseAbiParams(
           method.inputs.map((i) => i.type),
           args,
@@ -97,6 +107,7 @@ export async function writeToContract(fastify: FastifyInstance) {
           "BAD_REQUEST",
         );
       }
+
       const transaction = prepareContractCall({
         contract,
         method,

src/server/utils/abi.ts

@@ -2,7 +2,10 @@ import type { Abi } from "thirdweb/utils";
 import type { AbiSchemaType } from "../schemas/contract";
 
 export function sanitizeAbi(abi: AbiSchemaType | undefined): Abi | undefined {
-  if (!abi) return undefined;
+  if (!abi) {
+    return undefined;
+  }
+
   return abi.map((item) => {
     if (item.type === "function") {
       return {
@@ -15,3 +18,6 @@ export function sanitizeAbi(abi: AbiSchemaType | undefined): Abi | undefined {
     return item;
   }) as Abi;
 }
+
+export const sanitizeFunctionName = (val: string) =>
+  val.includes("(") && !val.startsWith("function ") ? `function ${val}` : val;

test/e2e/tests/write.test.ts → test/e2e/tests/routes/write.test.ts

@@ -2,13 +2,13 @@ import { beforeAll, describe, expect, test } from "bun:test";
 import assert from "node:assert";
 import { type Address, stringToHex } from "thirdweb";
 import { zeroAddress } from "viem";
-import type { ApiError } from "../../../sdk/dist/thirdweb-dev-engine.cjs";
-import { CONFIG } from "../config";
-import type { setupEngine } from "../utils/engine";
-import { pollTransactionStatus } from "../utils/transactions";
-import { setup } from "./setup";
+import type { ApiError } from "../../../../sdk/dist/thirdweb-dev-engine.cjs.js";
+import { CONFIG } from "../../config";
+import type { setupEngine } from "../../utils/engine";
+import { pollTransactionStatus } from "../../utils/transactions";
+import { setup } from "../setup";
 
-describe("Write Tests", () => {
+describe("/contract/write route", () => {
   let tokenContractAddress: string;
   let engine: ReturnType<typeof setupEngine>;
   let backendWallet: Address;
@@ -183,6 +183,28 @@ describe("Write Tests", () => {
     expect(writeTransactionStatus.minedAt).toBeDefined();
   });
 
+  test("Write to a contract with function signature without prefix", async () => {
+    const writeRes = await engine.contract.write(
+      CONFIG.CHAIN.id.toString(),
+      tokenContractAddress,
+      backendWallet,
+      {
+        functionName: "setContractURI(string uri)",
+        args: ["https://signature-test.com"],
+      },
+    );
+
+    expect(writeRes.result.queueId).toBeDefined();
+
+    const writeTransactionStatus = await pollTransactionStatus(
+      engine,
+      writeRes.result.queueId,
+      true,
+    );
+
+    expect(writeTransactionStatus.minedAt).toBeDefined();
+  });
+
   test("Write to a contract with function abi", async () => {
     const writeRes = await engine.contract.write(
       CONFIG.CHAIN.id.toString(),