delegatedSignMessage

delegatedSignMessage(
  client: DelegatedEvmWalletClient,
  params: {
    walletId: string;
    walletApiKey: string;
    keyShare: ServerKeyShare;
    message: string;
    context?: SignMessageContext;
    onError?: (error: Error) => void;
  }
): Promise<string>

import { 
  createDelegatedEvmWalletClient,
  delegatedSignMessage 
} from '@dynamic-labs-wallet/node-evm';

const delegatedClient = createDelegatedEvmWalletClient({
  environmentId: 'your-environment-id',
  apiKey: 'your-server-api-key',
});

const signature = await delegatedSignMessage(delegatedClient, {
  walletId: 'wallet-id-from-webhook',
  walletApiKey: 'wallet-api-key-from-webhook',
  keyShare: keyShareFromWebhook,
  message: 'Hello, World!',
});

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

const signature = await delegatedSignMessage(delegatedClient, {
  walletId: 'wallet-id-from-webhook',
  walletApiKey: 'wallet-api-key-from-webhook',
  keyShare: keyShareFromWebhook,
  message: 'Sign this message to authenticate',
  context: {
    evmMessage: 'Sign this message to authenticate',
  },
});

const signature = await delegatedSignMessage(delegatedClient, {
  walletId: 'wallet-id-from-webhook',
  walletApiKey: 'wallet-api-key-from-webhook',
  keyShare: keyShareFromWebhook,
  message: 'Hello, World!',
  onError: (error) => {
    console.error('Signing error:', error);
    // Implementation (important-comment)
  },
});

try {
  const signature = await delegatedSignMessage(delegatedClient, {
    walletId: credentials.walletId,
    walletApiKey: credentials.walletApiKey,
    keyShare: credentials.keyShare,
    message: 'Sign this to prove ownership',
  });
  
  console.log('Message signed successfully');
  return signature;
} catch (error) {
  console.error('Failed to sign message:', error);
  throw error;
}

type ServerKeyShare = {
  pubkey: {
    pubkey: Uint8Array;
  };
  secretShare: string;
};

type SignMessageContext = {
  evmMessage?: string;
  [key: string]: any;
};

async function authenticateUser(userId: string): Promise<string> {
  const credentials = await getDelegationCredentials(userId);
  const nonce = generateNonce();
  const message = `Authenticate with nonce: ${nonce}`;
  
  return await delegatedSignMessage(delegatedClient, {
    walletId: credentials.walletId,
    walletApiKey: credentials.walletApiKey,
    keyShare: credentials.keyShare,
    message,
  });
}

async function signOwnershipProof(
  userId: string,
  resourceId: string
): Promise<string> {
  const credentials = await getDelegationCredentials(userId);
  const timestamp = Date.now();
  const message = `I own resource ${resourceId} at ${timestamp}`;
  
  return await delegatedSignMessage(delegatedClient, {
    walletId: credentials.walletId,
    walletApiKey: credentials.walletApiKey,
    keyShare: credentials.keyShare,
    message,
  });
}

try {
  const signature = await delegatedSignMessage(delegatedClient, params);
} catch (error) {
  if (error.message.includes('key share')) {
    console.error('Invalid or expired delegation credentials');
  } else if (error.message.includes('wallet')) {
    console.error('Wallet not found or access denied');
  } else {
    console.error('Signing failed:', error);
  }
}