add example contract call (#460)

* add example contract call

* add deps resolutions to example

* use ethers v6

examples/relayer-call-contract-function/box.json

@@ -0,0 +1,52 @@
+[
+  {
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "nonpayable",
+    "type": "constructor"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "ValueChanged",
+    "type": "event"
+  },
+  {
+    "inputs": [],
+    "name": "retrieve",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "store",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  }
+]

examples/relayer-call-contract-function/index.js

@@ -0,0 +1,47 @@
+require('dotenv').config();
+
+const { ethers, version } = require('ethers');
+const BoxAbi = require('./box.json');
+const { Defender } = require('@openzeppelin/defender-sdk');
+
+function sleep(ms) {
+  return new Promise((resolve) => {
+    setTimeout(resolve, ms);
+  });
+}
+
+async function main() {
+  const creds = {
+    relayerApiKey: process.env.RELAYER_API_KEY,
+    relayerApiSecret: process.env.RELAYER_API_SECRET,
+  };
+  const validUntil = new Date(Date.now() + 120 * 1000).toISOString();
+
+  const client = new Defender(creds);
+  console.log('using ethers version ', version);
+
+  const provider = client.relaySigner.getProvider({ ethersVersion: 'v6' });
+  const signer = await client.relaySigner.getSigner(provider, { speed: 'fast', validUntil, ethersVersion: 'v6' });
+
+  const contractAddress = '0x1B9ec5Cc45977927fe6707f2A02F51e1415f2052';
+  const contract = new ethers.Contract(contractAddress, BoxAbi, signer);
+
+  console.log(`Calling store function`);
+  const result = await contract.store('10');
+
+  console.log(`Transaction sent:`, result.hash);
+  console.log(`Status:`, result.status);
+
+  // polls until the transaction is mined.
+  let recipt = null;
+  while (recipt == null) {
+    recipt = await provider.getTransactionReceipt(result.hash);
+    console.log('sleep 1s before requesting again');
+    await sleep(1000);
+  }
+  console.log(recipt);
+}
+
+if (require.main === module) {
+  main().catch(console.error);
+}

examples/relayer-call-contract-function/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@openzeppelin/defender-sdk-example-relayer-contract-function",
+  "version": "1.14.1",
+  "private": true,
+  "main": "index.js",
+  "author": "OpenZeppelin Defender <[email protected]>",
+  "license": "MIT",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "@openzeppelin/defender-sdk": "1.14.1",
+    "dotenv": "^16.3.1",
+    "ethers": "^6.9.0"
+  }
+}