test: blob archive client factory code

yarn-project/blob-sink/src/archive/blobscan_archive_client.test.ts

@@ -39,7 +39,7 @@ describe('blobscan_archive_client', () => {
   });
 
   describe('getBlobData', () => {
-    const expectedUrl = `https://api.blobscan.dev/blobs/${blobId}/data`;
+    const expectedUrl = new URL(`https://api.blobscan.dev/blobs/${blobId}/data`);
 
     it('fetches blob data', async () => {
       await loadResponse('blobscan_get_blob_data.json');
@@ -60,7 +60,7 @@ describe('blobscan_archive_client', () => {
   });
 
   describe('getBlobsFromBlock', () => {
-    const expectedUrl = `https://api.blobscan.dev/blocks/${blockId}?type=canonical&expand=blob%2Cblob_data`;
+    const expectedUrl = new URL(`https://api.blobscan.dev/blocks/${blockId}?type=canonical&expand=blob%2Cblob_data`);
 
     it('fetches blobs from block', async () => {
       await loadResponse('blobscan_get_block.json');

yarn-project/blob-sink/src/archive/blobscan_archive_client.ts

@@ -68,22 +68,30 @@ export class BlobscanArchiveClient implements BlobArchiveClient {
     );
   };
 
-  private readonly baseUrl;
+  private readonly baseUrl: URL;
 
   private instrumentation: BlobArchiveClientInstrumentation;
 
   constructor(baseUrl: string, telemetry: TelemetryClient = getTelemetryClient()) {
-    this.baseUrl = baseUrl.replace(/^https?:\/\//, '');
+    this.baseUrl = new URL(baseUrl);
+    if (this.baseUrl.protocol !== 'https:') {
+      throw new TypeError('BaseURL must be secure: ' + baseUrl);
+    }
     this.instrumentation = new BlobArchiveClientInstrumentation(
       telemetry,
-      new URL(baseUrl).host,
+      this.baseUrl.origin,
       'BlobscanArchiveClient',
     );
   }
 
   public async getLatestBlock(): Promise<{ hash: string; number: number; slot: number }> {
-    const url = `https://${this.baseUrl}/blocks?sort=desc&type=canonical&p=1&ps=1`;
-    this.logger.trace(`Fetching latest block from ${url}`);
+    const url = new URL('blocks', this.baseUrl);
+    url.searchParams.set('sort', 'desc');
+    url.searchParams.set('type', 'canonical');
+    url.searchParams.set('p', '1');
+    url.searchParams.set('ps', '1');
+
+    this.logger.trace(`Fetching latest block from ${url.href}`);
     const response = await this.fetch(url, this.fetchOpts);
 
     if (response.status !== 200) {
@@ -106,12 +114,15 @@ export class BlobscanArchiveClient implements BlobArchiveClient {
   }
 
   public getBaseUrl(): string {
-    return this.baseUrl;
+    return this.baseUrl.href;
   }
 
   public async getBlobsFromBlock(blockId: string): Promise<BlobJson[] | undefined> {
-    const url = `https://${this.baseUrl}/blocks/${blockId}?type=canonical&expand=blob%2Cblob_data`;
-    this.logger.trace(`Fetching blobs for block ${blockId} from ${url}`);
+    const url = new URL(`blocks/${blockId}`, this.baseUrl);
+    url.searchParams.set('type', 'canonical');
+    url.searchParams.set('expand', 'blob,blob_data');
+
+    this.logger.trace(`Fetching blobs for block ${blockId} from ${url.href}`);
     const response = await this.fetch(url, this.fetchOpts);
 
     this.instrumentation.incRequest('blocks', response.status);
@@ -137,7 +148,9 @@ export class BlobscanArchiveClient implements BlobArchiveClient {
   }
 
   public async getBlobData(id: string): Promise<Buffer | undefined> {
-    const response = await this.fetch(`https://${this.baseUrl}/blobs/${id}/data`, this.fetchOpts);
+    const url = new URL(`blobs/${id}/data`, this.baseUrl);
+
+    const response = await this.fetch(url, this.fetchOpts);
     this.instrumentation.incRequest('blobs', response.status);
     if (response.status === 404) {
       return undefined;

yarn-project/blob-sink/src/archive/factory.test.ts

@@ -0,0 +1,27 @@
+import type { BlobSinkArchiveApiConfig } from './config.js';
+import { createBlobArchiveClient } from './factory.js';
+
+describe('BlobscanArchiveClient factory', () => {
+  it.each<[string, BlobSinkArchiveApiConfig, boolean, string]>([
+    ['empty config', {}, false, ''],
+    ['random chain, no custom URL', { l1ChainId: 23478 }, false, ''],
+    [
+      'random chain, custom URL',
+      { l1ChainId: 23478, archiveApiUrl: 'https://example.com' },
+      true,
+      'https://example.com/',
+    ],
+    ['ETH mainnet default URL', { l1ChainId: 1 }, true, 'https://api.blobscan.com/'],
+    ['ETH mainnet custom URL', { l1ChainId: 1, archiveApiUrl: 'https://example.com' }, true, 'https://example.com/'],
+    ['Sepolia default URL', { l1ChainId: 11155111 }, true, 'https://api.sepolia.blobscan.com/'],
+    ['Seplia custom URL', { l1ChainId: 11155111, archiveApiUrl: 'https://example.com' }, true, 'https://example.com/'],
+  ])('can instantiate a client: %s', (_, cfg, clientExpected, expectedBaseUrl) => {
+    const client = createBlobArchiveClient(cfg);
+    if (clientExpected) {
+      expect(client).toBeDefined();
+      expect(client!.getBaseUrl()).toEqual(expectedBaseUrl);
+    } else {
+      expect(client).not.toBeDefined();
+    }
+  });
+});

yarn-project/blob-sink/src/client/http.test.ts

@@ -411,7 +411,7 @@ describe('HttpBlobSinkClient', () => {
     });
 
     it('should fall back to archive client', async () => {
-      const client = new TestHttpBlobSinkClient({ archiveApiUrl: `http://api.blobscan.com` });
+      const client = new TestHttpBlobSinkClient({ archiveApiUrl: `https://api.blobscan.com` });
       const archiveSpy = jest.spyOn(client.getArchiveClient(), 'getBlobsFromBlock').mockResolvedValue(blobData);
 
       const retrievedBlobs = await client.getBlobSidecar('0x1234', [testEncodedBlobHash]);