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Overview

This guide walks you through creating EVM wallets using Dynamic’s Node SDK. You’ll learn how to set up different threshold signature schemes and understand the security implications of each choice.

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Prerequisites

Before you begin, make sure you have:

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Step 1: Choose Your Security Model

Dynamic supports three threshold signature schemes, each offering different security and availability trade-offs:
  • Security: Highest - requires both your server and Dynamic’s infrastructure
  • Availability: Lower - both parties must be online
  • Use case: High-value transactions, maximum security

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TWO_OF_THREE

  • Security: High - requires 2 out of 3 shares
  • Availability: Medium - can tolerate one party being offline
  • Use case: Balanced security and availability

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THREE_OF_FIVE

  • Security: Good - requires 3 out of 5 shares
  • Availability: High - can tolerate two parties being offline
  • Use case: High availability requirements

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Step 2: Create Your First Wallet

Here’s a complete example of creating an EVM wallet: 
import { DynamicEvmWalletClient } from '@dynamic-labs-wallet/node-evm';
import { ThresholdSignatureScheme } from '@dynamic-labs-wallet/node';

// Create authenticated client
export const authenticatedEvmClient = async () => {
  const client = new DynamicEvmWalletClient({
    authToken: process.env.DYNAMIC_AUTH_TOKEN!,
    environmentId: process.env.DYNAMIC_ENVIRONMENT_ID!,
  });

  await client.authenticateApiToken(process.env.DYNAMIC_AUTH_TOKEN!);
  return client;
};

export const createEvmWallet = async ({
  thresholdSignatureScheme = ThresholdSignatureScheme.TWO_OF_TWO,
  password
}: {
  thresholdSignatureScheme?: ThresholdSignatureScheme;
  password?: string;
}) => {
  const evmClient = await authenticatedEvmClient();

  const wallet = await evmClient.createWalletAccount({
    thresholdSignatureScheme,
    password,
    backUpToClientShareService: true,
  });

  return {
    accountAddress: wallet.accountAddress,
    publicKeyHex: wallet.publicKeyHex,
    walletId: wallet.walletId,
  };
};

// Usage example
const wallet = await createEvmWallet({
  thresholdSignatureScheme: ThresholdSignatureScheme.TWO_OF_TWO,
  password: 'your-secure-password',
});

console.log('Wallet created:', wallet.accountAddress);

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Step 3: Handle Errors Gracefully

Always implement proper error handling for wallet creation: 
try {
  const wallet = await createEvmWallet({
    thresholdSignatureScheme: ThresholdSignatureScheme.TWO_OF_TWO,
  });
  console.log('Wallet created successfully:', wallet.accountAddress);
} catch (error) {
  if (error.message.includes('insufficient funds')) {
    console.error('Insufficient funds for wallet creation');
  } else if (error.message.includes('invalid session')) {
    console.error('Invalid session ID - please re-authenticate');
  } else {
    console.error('Wallet creation failed:', error.message);
  }
}

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Step 4: Store Wallet Information Securely

After creating a wallet, you’ll receive important information that should be stored securely: 
const wallet = await evmClient.createWalletAccount({
  thresholdSignatureScheme: ThresholdSignatureScheme.TWO_OF_TWO
});

// Store these securely in your database
const walletData = {
  accountAddress: wallet.accountAddress,
  walletId: wallet.walletId,
  thresholdScheme: ThresholdSignatureScheme.TWO_OF_TWO,
  createdAt: new Date().toISOString(),
};

// Never store externalServerKeyShares in plain text
// They should be encrypted and stored securely

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Best Practices

  1. Password Security: Use strong, unique passwords for each wallet
  2. Session Management: Implement proper session lifecycle management
  3. Error Handling: Always handle potential errors during wallet creation
  4. Monitoring: Log wallet creation events for audit purposes
  5. Backup Strategy: Implement secure backup strategies for key shares

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Next Steps

Now that you’ve created a wallet, you can: