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// examples/verify-callback-example.ts
// Import directly from src for running locally before publishing
// In a real project, you'd import from 'digiid-ts' after installing
// Revert extension, ts-node should handle this when configured
import { verifyDigiIDCallback, DigiIDCallbackData, DigiIDError } from '../src/index';
console.log('--- DigiID Callback Verification Example ---');
// --- Mock Data & Setup ---
// This would normally come from your session/database lookup based on the request
const EXPECTED_NONCE = '61616161616161616161616161616161'; // Matches default nonce from crypto mock
const EXPECTED_CALLBACK_URL = 'https://myapp.example.com/api/auth/digiid';
// This data would normally come from the POST request body sent by the wallet
const mockCallbackData: DigiIDCallbackData = {
address: 'D7dVskXFpH8gTgZG9sN3d6dPUbJtZfJ2Vc', // A syntactically valid address
// URI containing the expected callback and nonce
uri: `digiid://myapp.example.com/api/auth/digiid?x=${EXPECTED_NONCE}&u=0`,
// IMPORTANT: This is a placeholder signature!
// Real verification requires a valid signature generated by a wallet signing the URI.
// This example will likely fail signature verification if run against the real library,
// unless the underlying verify function is mocked/stubbed.
signature: 'AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiYw==',
};
// Verification options derived from our expected state
const verifyOptions = {
expectedCallbackUrl: EXPECTED_CALLBACK_URL,
expectedNonce: EXPECTED_NONCE,
};
// --- Simulation Function ---
async function simulateVerification(data: DigiIDCallbackData, options: typeof verifyOptions) {
console.log('\nAttempting verification with:');
console.log(` Address: ${data.address}`);
console.log(` URI: ${data.uri}`);
console.log(` Signature: ${data.signature.substring(0, 30)}...`);
console.log(` Expected URL: ${options.expectedCallbackUrl}`);
console.log(` Expected Nonce: ${options.expectedNonce}`);
try {
const result = await verifyDigiIDCallback(data, options);
console.log('\nVerification Successful!');
console.log(` Address Verified: ${result.address}`);
console.log(` Nonce Verified: ${result.nonce}`);
// In a real app: log user in, mark nonce as used, etc.
} catch (error) {
if (error instanceof DigiIDError) {
console.error(`\nVerification Failed: ${error.message}`);
// In a real app: return 400 Bad Request
} else {
console.error('\nUnexpected Verification Error:', error);
// In a real app: return 500 Internal Server Error
}
}
}
// --- Run Simulation ---
// Simulate verifying the correct data (likely fails signature check without mocks)
// We wrap this in an async IIFE (Immediately Invoked Function Expression)
// to use await at the top level.
(async () => {
await simulateVerification(mockCallbackData, verifyOptions);
// Example: Simulate a Nonce Mismatch
console.log('\n--- Simulating Nonce Mismatch ---');
await simulateVerification(
mockCallbackData,
{ ...verifyOptions, expectedNonce: 'DIFFERENT_NONCE' }
);
// Example: Simulate a URL Mismatch
console.log('\n--- Simulating URL Mismatch ---');
await simulateVerification(
mockCallbackData,
{ ...verifyOptions, expectedCallbackUrl: 'https://wrongsite.com/callback' }
);
// Example: Simulate missing signature
console.log('\n--- Simulating Missing Signature ---');
await simulateVerification(
{ ...mockCallbackData, signature: '' },
verifyOptions
);
console.log('\n--- End of Verification Example ---');
})();
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