Mesh SDK Wallet Skill

AI-assisted Cardano wallet integration using @meshsdk/wallet.

Package Info

npm install @meshsdk/wallet
# or
npm install @meshsdk/core  # includes wallet + transaction + provider

Two Wallet Types

Quick Reference

Browser Wallet (CIP-30)

import { MeshCardanoBrowserWallet } from '@meshsdk/wallet';

// List installed wallets
const wallets = MeshCardanoBrowserWallet.getInstalledWallets();
// → [{ id: 'eternl', name: 'Eternl', icon: '...', version: '...' }, ...]

// Connect to wallet
const wallet = await MeshCardanoBrowserWallet.enable('eternl');

// Get addresses (Bech32)
const addresses = await wallet.getUsedAddressesBech32();
const changeAddr = await wallet.getChangeAddressBech32();
const stakeAddrs = await wallet.getRewardAddressesBech32();

// Get UTxOs and balance (Mesh format)
const utxos = await wallet.getUtxosMesh();
const balance = await wallet.getBalanceMesh();
const collateral = await wallet.getCollateralMesh();

// Sign and submit
const signedTx = await wallet.signTxReturnFullTx(unsignedTxHex);
const txHash = await wallet.submitTx(signedTx);

// Sign data (CIP-8)
const signature = await wallet.signData(address, 'Hello Cardano!');

Headless Wallet (Server-Side)

import { MeshCardanoHeadlessWallet } from '@meshsdk/wallet';
import { BlockfrostProvider } from '@meshsdk/core';

const provider = new BlockfrostProvider('your-api-key');

// From mnemonic
const wallet = await MeshCardanoHeadlessWallet.fromMnemonic({
  mnemonic: ['word1', 'word2', ...],  // 24 words
  networkId: 0,  // 0 = testnet, 1 = mainnet
  walletAddressType: 'Base',  // 'Base' or 'Enterprise'
  fetcher: provider,
  submitter: provider,
});

// Same API as browser wallet
const address = await wallet.getChangeAddressBech32();
const utxos = await wallet.getUtxosMesh();
const signedTx = await wallet.signTxReturnFullTx(unsignedTxHex);

Files

• [WALLET.md](./WALLET.md) - Complete API reference
• [PATTERNS.md](./PATTERNS.md) - Common wallet patterns
• [TROUBLESHOOTING.md](./TROUBLESHOOTING.md) - Error solutions

CIP-30 Methods

Standard wallet interface methods:

Mesh Extensions

Enhanced methods for better developer experience:

Important Notes

1. Browser wallet requires user interaction - enable() prompts the user
2. Headless wallet needs fetcher - For UTxO queries and signing
3. Network ID matters - 0 for testnet/preprod, 1 for mainnet
4. Collateral is auto-selected - Returns smallest pure-ADA UTxO >= 5 ADA