feat: add endpoint to get current proof by name or fid (#46)

src/app.ts

@@ -7,6 +7,7 @@ import { log } from './log.js';
 import { generateCCIPSignature, signer, signerAddress } from './signature.js';
 import {
   createTransfer,
+  getCurrentUsername,
   getLatestTransfer,
   getTransferById,
   getTransferHistory,
@@ -63,6 +64,25 @@ app.get('/transfers', async (req, res) => {
   res.send({ transfers });
 });
 
+app.get('/transfers/current', async (req, res) => {
+  let name: string | undefined;
+  if (req.query.fid) {
+    name = await getCurrentUsername(parseInt(req.query.fid.toString()), db);
+  } else if (req.query.name) {
+    name = req.query.name.toString();
+  }
+  if (!name || name === '') {
+    res.status(404).send({ error: 'Could not resolve current name' }).end();
+    return;
+  }
+  const transfer = await getLatestTransfer(name, db);
+  if (!transfer || transfer.to === 0) {
+    res.status(404).send({ error: 'No transfer found' }).end();
+    return;
+  }
+  res.send({ transfer });
+});
+
 app.post('/transfers', async (req, res) => {
   let tr;
   try {

tests/index.test.ts

@@ -80,6 +80,41 @@ describe('app', () => {
     });
   });
 
+  describe('get current transfer', () => {
+    test('returns error for unknown name', async () => {
+      let response = await request(app).get('/transfers/current?name=nonexistent');
+      expect(response.status).toBe(404);
+
+      // Name was burned
+      response = await request(app).get('/transfers/current?name=test3');
+      expect(response.status).toBe(404);
+    });
+    test('returns error for unknown fid', async () => {
+      let response = await request(app).get('/transfers/current?fid=129837123');
+      expect(response.status).toBe(404);
+
+      // Name was burned
+      response = await request(app).get('/transfers/current?fid=3');
+      expect(response.status).toBe(404);
+    });
+    test('returns error if no name or fid provided', async () => {
+      const response = await request(app).get('/transfers/current');
+      expect(response.status).toBe(404);
+    });
+    test('returns latest transfer for fid', async () => {
+      await createTestTransfer(db, { username: 'test-current', from: 0, to: 3, timestamp: now + 3 });
+      const response = await request(app).get('/transfers/current?fid=3');
+      expect(response.status).toBe(200);
+      expect(response.body.transfer).toMatchObject({ username: 'test-current', from: 0, to: 3, timestamp: now + 3 });
+    });
+    test('returns latest transfer for name', async () => {
+      await createTestTransfer(db, { username: 'test3', from: 0, to: 10, timestamp: now + 3 });
+      const response = await request(app).get('/transfers/current?name=test3');
+      expect(response.status).toBe(200);
+      expect(response.body.transfer).toMatchObject({ username: 'test3', from: 0, to: 10, timestamp: now + 3 });
+    });
+  });
+
   describe('create transfer', () => {
     const now = currentTimestamp();