signTypedData

signTypedData(params: {
  walletMetadata: WalletMetadata;
  typedData: TypedData;
  password?: string;
  externalServerKeyShares?: ServerKeyShare[];
  onError?: (error: Error) => void;
}): Promise<string>

import { DynamicEvmWalletClient } from '@dynamic-labs-wallet/node-evm';
import type { TypedData } from 'viem';

const evmClient = new DynamicEvmWalletClient({
  environmentId: 'your-environment-id',
});
await evmClient.authenticateApiToken('your-api-token');

const typedData = {
  domain: {
    name: 'My App',
    version: '1',
    chainId: 8453,
  },
  types: {
    Permit: [
      { name: 'owner', type: 'address' },
      { name: 'spender', type: 'address' },
      { name: 'value', type: 'uint256' },
      { name: 'nonce', type: 'uint256' },
      { name: 'deadline', type: 'uint256' },
    ],
  },
  primaryType: 'Permit',
  message: {
    owner: '0xYourWalletAddress',
    spender: '0xContractAddress',
    value: 1000000n,
    nonce: 0n,
    deadline: 1735689600n,
  },
} as TypedData;

// Load the metadata + shares you persisted at creation time.
const walletMetadata = JSON.parse(await redis.get(`wallet:${accountAddress}`));
const externalServerKeyShares = await vault.read(`wallet:${accountAddress}/shares`);

const signature = await evmClient.signTypedData({
  walletMetadata,
  typedData,
  externalServerKeyShares,
  password: 'user-password', // required when wallet was created with backUpToDynamic: true
});

console.log('Signature:', signature);

const walletClient = await evmClient.getWalletClient({
  accountAddress: '0xYourWalletAddress',
  chainId: 8453,
  rpcUrl: 'https://mainnet.base.org',
});

const signature = await walletClient.signTypedData({
  domain: { name: 'My App', version: '1', chainId: 8453 },
  types: { Permit: [/* ... */] },
  primaryType: 'Permit',
  message: { /* ... */ },
});

try {
  const signature = await evmClient.signTypedData({
    walletMetadata,
    typedData,
    externalServerKeyShares,
    password: 'user-password',
    onError: (err) => console.error('Signing error:', err),
  });
  console.log('Signed:', signature);
} catch (error) {
  console.error('Failed to sign typed data:', error);
}