feat: complete day 7

2025-07-15 16:18:19 +01:00
parent f87c93e85c
commit 10447cd05e
7 changed files with 283 additions and 55 deletions
@@ -0,0 +1,37 @@
+// services/Web3Service.js
+const { Web3 } = require("web3");
+
+const web3 = new Web3(process.env.ALCHEMY_API_URL);
+
+module.exports = {
+  web3,
+  createWallet: () => {
+    return web3.eth.accounts.create();
+  },
+  signMessage: (privateKey, message) => {
+    return web3.eth.accounts.sign(message, privateKey);
+  },
+  getBalance: async (address) => {
+    const balanceWei = await web3.eth.getBalance(address);
+    return web3.utils.fromWei(balanceWei, "ether");
+  },
+  transfer: async (privateKey, to, amount) => {
+    const account = web3.eth.accounts.privateKeyToAccount(privateKey);
+    const from = account.address;
+    const nonce = await web3.eth.getTransactionCount(from, "latest");
+
+    const gasPrice = await web3.eth.getGasPrice();
+
+    const tx = {
+      from,
+      to,
+      value: web3.utils.toWei(amount, "ether"),
+      gas: 21000,
+      gasPrice,
+      nonce,
+    };
+
+    const signed = await account.signTransaction(tx);
+    return web3.eth.sendSignedTransaction(signed.rawTransaction);
+  },
+};