Skill: pin-alt/2026-02-10-clawhub-base-wallet-1-5-0 (version 1.0.0)

--- name: base-wallet description: "🔐 Base Wallet - Crypto Identity for AI Agents. Create wallets, sign messages (SIWE), send transactions programmatically. No browser extensions, no human intervention. The foundation for autonomous Web3 agents." --- # 🔐 Base Wallet - Crypto Identity for AI Agents > Every autonomous agent needs a wallet. Create one without human help. **TL;DR:** Programmatic wallet creation on Base/Ethereum. SIWE auth, balance checks, transactions. ## Why Base Wallet? - **True autonomy** — Your agent creates and controls its own wallet - **No browser needed** — Pure CLI, no extensions or popups - **SIWE ready** — Sign-In with Ethereum for Web3 services - **Secure by default** — Environment variables, no plaintext keys Create and manage Base chain (Ethereum-compatible) wallets programmatically. --- ## ⚠️ Security First | ✅ DO | ❌ DON'T | |-------|----------| | Use **environment variables** for private keys | Store private keys in plain text files | | Set wallet files to **chmod 600** | Commit wallet files to git | | Use `--env` mode (recommended) | Use `console.log(privateKey)` | | Back up mnemonics **offline** | Share private keys or mnemonics | --- ## Quick Start ### Create a New Wallet (Recommended) ```bash # Output as environment variable format (safest) node scripts/create-wallet.js --env # Output example: # export WALLET_ADDRESS="0x..." # export PRIVATE_KEY="0x..." ``` Then copy to your shell or `.env` file. ### Create with File Storage (Opt-in) ```bash # Only if you need file-based storage node scripts/create-wallet.js --managed my-agent ``` ⚠️ This stores private key in `~/.openclaw/wallets/my-agent.json` --- ## Usage Examples ### Load Wallet from Environment ```javascript const { ethers } = require('ethers'); // ✅ SECURE: Load from environment variable const wallet = new ethers.Wallet(process.env.PRIVATE_KEY); console.log('Address:', wallet.address); // ❌ NEVER: console.log('Private Key:', wallet.privateKey); ``` ### Load from Mnemonic ```javascript const wallet = ethers.Wallet.fromPhrase(process.env.MNEMONIC); ``` ### Check Balance ```javascript const provider = new ethers.JsonRpcProvider('https://mainnet.base.org'); const balance = await provider.getBalance(wallet.address); console.log('Balance:', ethers.formatEther(balance), 'ETH'); ``` ### Sign Message (SIWE) ```javascript const message = `example.com wants you to sign in with your Ethereum account: ${wallet.address} Sign in message URI: https://example.com Version: 1 Chain ID: 8453 Nonce: ${nonce} Issued At: ${new Date().toISOString()}`; const signature = await wallet.signMessage(message); ``` ### Send Transaction ```javascript const provider = new ethers.JsonRpcProvider('https://mainnet.base.org'); const connectedWallet = wallet.connect(provider); const tx = await connectedWallet.sendTransaction({ to: recipientAddress, value: ethers.parseEther('0.001') }); const receipt = await tx.wait(); console.log('TX Hash:', tx.hash); ``` --- ## Scripts | Script | Description | |--------|-------------| | `create-wallet.js --env` | Create wallet, output as env vars (recommended) | | `create-wallet.js --managed [name]` | Create wallet, save to file (opt-in) | | `create-wallet.js --json` | Create wallet, output as JSON | | `basemail-register.js [name]` | Register for BaseMail email | | `check-balance.js [address]` | Check wallet balance | --- ## BaseMail Integration Register for a @basemail.ai email using your wallet signature. ```bash # If using environment variable: PRIVATE_KEY="0x..." node scripts/basemail-register.js # If using managed wallet: node scripts/basemail-register.js my-agent ``` --- ## Network Configuration | Network | Chain ID | RPC URL | |---------|----------|---------| | Base Mainnet | 8453 | https://mainnet.base.org | | Base Sepolia | 84532 | https://sepolia.base.org | --- ## 📝 Audit Logging Operations are logged to `~/.base-wallet/audit.log`. --- ## Secure Storage Pattern ```javascript // ✅ Recommended: Use environment variables const privateKey = process.env.PRIVATE_KEY; if (!privateKey) { throw new Error('PRIVATE_KEY environment variable not set'); } const wallet = new ethers.Wallet(privateKey); // ❌ Avoid: Storing private keys in code or files ``` If you must store to file (not recommended): ```javascript const fs = require('fs'); const path = require('path'); // Store with restricted permissions const filepath = path.join(process.env.HOME, '.openclaw', 'wallets', 'wallet.json'); fs.writeFileSync(filepath, JSON.stringify({ address: wallet.address, // Only store if absolutely necessary privateKey: wallet.privateKey }), { mode: 0o600 }); // Owner read/write only ``` --- ## .gitignore Add to your project's `.gitignore`: ```gitignore # Wallet files - NEVER commit! .openclaw/ *.wallet.json *.mnemonic private-key* ``` --- ## Dependencies ```bash npm install ethers ``` --- ## Changelog ### v1.1.0 (2026-02-08) - 🔐 Security: Changed create-wallet.js to opt-in file storage - ✨ Added --env mode (recommended) - 📝 Added audit logging - ⚠️ Removed console.log(privateKey) from examples - 📄 Enhanced security documentation ### v1.0.0 - 🎉 Initial release


Security scan verdicts — ClawScan: suspicious | static analysis: suspicious | VirusTotal: clean | SkillSpector: suspicious (CRITICAL)