[SDK] Feature: prepareCreateToken returns prepared transaction (#7872)

Author: gregfromstl

.changeset/twenty-bees-sink.md

@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Update createToken to return a prepared transaction

packages/thirdweb/src/exports/tokens.ts

@@ -6,7 +6,7 @@ export {
   DEFAULT_DEVELOPER_ADDRESS,
   DEFAULT_DEVELOPER_REWARD_BPS,
 } from "../tokens/constants.js";
-export { createToken } from "../tokens/create-token.js";
+export { createToken, prepareCreateToken } from "../tokens/create-token.js";
 export { distributeToken } from "../tokens/distribute-token.js";
 export {
   getDeployedContractFactory,

packages/thirdweb/src/tokens/create-token.ts

@@ -62,3 +62,39 @@ export async function createToken(options: CreateTokenOptions) {
 
   return decodedEvent[0]?.args.asset;
 }
+
+export async function prepareCreateToken(options: CreateTokenOptions) {
+  const { client, params, account, launchConfig } = options;
+
+  const creator = params.owner || account.address;
+  const encodedInitData = await encodeInitParams({
+    client,
+    creator,
+    params,
+  });
+
+  const salt: Hex = generateSalt(options.salt || bytesToHex(randomBytes(31)));
+
+  const entrypoint = await getDeployedEntrypointERC20(options);
+
+  let hookData: Hex = "0x";
+  let contractId = padHex(toHex("ERC20Asset"), { size: 32 });
+  if (launchConfig?.kind === "pool") {
+    hookData = encodePoolConfig(launchConfig.config);
+    contractId = padHex(toHex("ERC20Asset_Pool"), { size: 32 });
+  }
+
+  const transaction = createById({
+    contract: entrypoint,
+    contractId,
+    params: {
+      data: encodedInitData,
+      hookData,
+      developer: options.developerAddress || DEFAULT_DEVELOPER_ADDRESS,
+      salt,
+    },
+    creator,
+  });
+
+  return transaction;
+}

packages/thirdweb/src/tokens/predict-address.ts

@@ -12,7 +12,7 @@ import {
 import type { CreateTokenOptions } from "./types.js";
 
 export async function predictAddress(options: CreateTokenOptions) {
-  const { client, account, params, launchConfig } = options;
+  const { client, params, launchConfig, account } = options;
 
   const creator = params.owner || account.address;
   const encodedInitData = await encodeInitParams({