[DeadEnd] Test Biconomy

.env.example

@@ -1,3 +1,8 @@
 NEAR_ACCOUNT_ID=
 NEAR_ACCOUNT_PRIVATE_KEY=
-NEAR_MULTICHAIN_CONTRACT=multichain-testnet-2.testnet
+NEAR_MULTICHAIN_CONTRACT=multichain-testnet-2.testnet
+
+PAYMASTER_KEY=
+PAYMASTER_URL=
+BUNDLER_URL=
+RELAYER_PK=

examples/gasless-tx.ts

@@ -0,0 +1,52 @@
+import dotenv from "dotenv";
+import { ethers } from "ethers";
+import { createSmartAccountClient } from "@biconomy/account";
+import { PaymasterMode } from "@biconomy/paymaster";
+
+const run = async (): Promise<void> => {
+  dotenv.config();
+  const config = {
+    // chain: "sepolia",
+    // chainId: 11155111,
+    rpcUrl: "https://rpc.sepolia.ethpandaops.io",
+    privateKey: process.env.RELAYER_PK!,
+    biconomyPaymasterApiKey: process.env.PAYMASTER_KEY!,
+    bundlerUrl: process.env.BUNDLER_URL!,
+  };
+
+  // Generate EOA from private key using ethers.js
+  const provider = new ethers.providers.JsonRpcProvider(config.rpcUrl);
+  const relayer = new ethers.Wallet(config.privateKey, provider);
+
+  // const biconomyPaymaster = await createPaymaster({
+  //   paymasterUrl: process.env.PAYMASTER_URL!,
+  // });
+  console.log("Bundler:", process.env.PAYMASTER_URL);
+  const smartWallet = await createSmartAccountClient({
+    signer: relayer,
+    bundlerUrl: config.bundlerUrl,
+    biconomyPaymasterApiKey: config.biconomyPaymasterApiKey,
+  });
+
+  const saAddress = await smartWallet.getAccountAddress();
+  console.log("SA Address", saAddress);
+
+  const tx = {
+    to: "0x1111111111111111111111111111111111111111",
+    value: 0, // Can't send non-zero values (or tx will fail)
+    data: "0xdeadbeef",
+  };
+
+  // Send the transaction and get the transaction hash
+  const userOpResponse = await smartWallet.sendTransaction(tx, {
+    paymasterServiceData: { mode: PaymasterMode.SPONSORED },
+  });
+  const { transactionHash } = await userOpResponse.waitForTxHash();
+  console.log("Transaction Hash", transactionHash);
+  const userOpReceipt = await userOpResponse.wait();
+  if (userOpReceipt.success == "true") {
+    console.log("UserOp receipt", userOpReceipt);
+    console.log("Transaction receipt", userOpReceipt.receipt);
+  }
+};
+run();

package.json

@@ -27,6 +27,8 @@
     "typescript": "^5.4.2"
   },
   "dependencies": {
+    "@biconomy/account": "^4.1.1",
+    "@biconomy/paymaster": "^4.1.1",
     "@ethereumjs/common": "^4.2.0",
     "@ethereumjs/tx": "^5.2.1",
     "@ethereumjs/util": "^9.0.2",