Eworg/plasma gasless

gasless-v2-headless-example/index.ts

@@ -10,7 +10,7 @@ import {
   Hex,
 } from "viem";
 import { privateKeyToAccount } from "viem/accounts";
-import { base } from "viem/chains";
+import { plasma } from "viem/chains";
 import { wethAbi } from "./abi/weth-abi";
 import { SignatureType, splitSignature } from "./utils/signature";
 
@@ -37,19 +37,19 @@ const headers = new Headers({
 // setup wallet client
 const client = createWalletClient({
   account: privateKeyToAccount(("0x" + PRIVATE_KEY) as `0x${string}`),
-  chain: base,
+  chain: plasma,
   transport: http(ALCHEMY_HTTP_TRANSPORT_URL),
 }).extend(publicActions); // extend wallet client with publicActions for public client
 
 // set up contracts
-const usdc = getContract({
-  address: "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
+const usdt = getContract({
+  address: "0xb8ce59fc3717ada4c02eadf9682a9e934f625ebb",
   abi: erc20Abi,
   client,
 });
 
-const weth = getContract({
-  address: "0x4200000000000000000000000000000000000006",
+const wxpl = getContract({
+  address: "0x6100E367285b01F48D07953803A2d8dCA5D19873",
   abi: wethAbi,
   client,
 });
@@ -70,22 +70,22 @@ async function fetchJsonOrThrow(res: Response) {
 
 const main = async () => {
   // specify sell amount
-  // USDC supports gasless approvals because it is an ERC-20 that supports the Permit function
-  const sellAmount = parseUnits("0.1", await usdc.read.decimals());
+  const sellAmount = 1_000_000_000_000_000_000;
 
   // 1. fetch price
   const priceParams = new URLSearchParams({
     chainId: client.chain.id.toString(),
-    sellToken: usdc.address,
-    buyToken: weth.address,
+    sellToken: wxpl.address,
+    buyToken: usdt.address,
     sellAmount: sellAmount.toString(),
   });
 
-  const priceUrl = "https://api.0x.org/gasless/price?" + priceParams.toString();
+  const priceUrl =
+    "https://staging.api.0x.org/gasless/price?" + priceParams.toString();
   const priceResponse = await fetch(priceUrl, { headers });
   const price = await fetchJsonOrThrow(priceResponse);
 
-  console.log("Fetching price to swap 0.1 USDC for WETH with Gasless API\n");
+  console.log("Fetching price to swap 1 WXPL for USDT with Gasless API\n");
   console.log(priceUrl + "\n");
   console.log("🏷 priceResponse: ", price, "\n");
 
@@ -94,11 +94,12 @@ const main = async () => {
   for (const [key, value] of priceParams.entries())
     quoteParams.append(key, value);
 
-  const quoteUrl = "https://api.0x.org/gasless/quote?" + quoteParams.toString();
+  const quoteUrl =
+    "https:/staging.api.0x.org/gasless/quote?" + quoteParams.toString();
   const quoteResponse = await fetch(quoteUrl, { headers });
   const quote = await fetchJsonOrThrow(quoteResponse);
 
-  console.log("Fetching quote to swap 0.1 USDC for WETH with Gasless API\n");
+  console.log("Fetching quote to swap 1 WXPL for USDT with Gasless API\n");
   console.log("💸 quoteResponse: ", quote, "\n");
 
   // 3. Check if token approval is required and if gasless approval is available
@@ -173,23 +174,9 @@ const main = async () => {
 
   async function standardApproval(): Promise<any> {
     if (quote.issues.allowance !== null) {
-      try {
-        const { request } = await usdc.simulate.approve([
-          quote.issues.allowance.spender,
-          maxUint256,
-        ]);
-        console.log("Approving Permit2 to spend USDC...", request);
-        // set approval
-        const hash = await usdc.write.approve(request.args);
-        console.log(
-          "Approved Permit2 to spend USDC.",
-          await client.waitForTransactionReceipt({ hash })
-        );
-      } catch (error) {
-        console.log("Error approving Permit2:", error);
-      }
+      console.log("WXPL needs to be approved for Permit2");
     } else {
-      console.log("USDC already approved for Permit2");
+      console.log("WXPL already approved for Permit2");
     }
   }
 
@@ -236,7 +223,7 @@ const main = async () => {
         requestBody.approval = approvalDataToSubmit;
       }
 
-      const response = await fetch("https://api.0x.org/gasless/submit", {
+      const response = await fetch("https:/staging.api.0x.org/gasless/submit", {
         method: "POST",
         headers: {
           "0x-api-key": ZERO_EX_API_KEY!,
@@ -258,7 +245,7 @@ const main = async () => {
   // 5. Check trade status
   async function fetchStatus(tradeHash: string) {
     const url =
-      "https://api.0x.org/gasless/status/" +
+      "https://staging,api.0x.org/gasless/status/" +
       tradeHash +
       "?" +
       "chainId=" +

gasless-v2-headless-example/package.json

@@ -12,6 +12,6 @@
   "dependencies": {
     "dotenv": "^16.4.5",
     "qs": "^6.12.1",
-    "viem": "^2.16.2"
+    "viem": "^2.37.6"
   }
 }