How to Generate and Store Ethereum Wallets in AWS Secrets Manager

Before we begin, ensure you have the following:

• Node.js (v16 or later recommended)
• AWS Account with Secrets Manager permissions
• IAM User or Role with access to AWS Secrets Manager
• AWS SDK for JavaScript (@aws-sdk/client-secrets-manager)
• ethers.js for Ethereum wallet creation

Step 1: Setting Up the Project

First, create a new Node.js project and install the necessary dependencies:

mkdir eth-wallet-secrets && cd eth-wallet-secrets
npm init -y
npm install ethers dotenv @aws-sdk/client-secrets-manager

Then, create a .env file to store your AWS configuration:

Step 2: Writing the Wallet Generation Script

import { Wallet } from "ethers";
import { SecretsManagerClient, CreateSecretCommand } from "@aws-sdk/client-secrets-manager";
import dotenv from "dotenv";

dotenv.config();

const REGION = process.env.AWS_REGION || "us-east-1";
const SECRET_NAME = process.env.AWS_SECRET_NAME || "BlockchainWallet";
const client = new SecretsManagerClient({ region: REGION });

async function generateAndStoreWallet() {
    try {
        // Generate a new Ethereum wallet
        const wallet = Wallet.createRandom();

        const walletData = {
            PUBLIC_ADDRESS: wallet.address,
            PRIVATE_KEY: wallet.privateKey,
            MNEMONIC: wallet.mnemonic?.phrase,
        };

        const command = new CreateSecretCommand({
            Name: SECRET_NAME,
            SecretString: JSON.stringify(walletData),
        });

        const response = await client.send(command);
        console.log("Wallet generated and stored successfully:", response);
    } catch (error) {
        console.error("Error generating or storing the wallet:", error);
    }
}

generateAndStoreWallet();

The result can be see like this in the AWS console: