feat(p2p): enable browser pkc mode

src/lib/__tests__/p2p-browser-config.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from 'vitest';
+
+import { configureP2PBrowserPkcOptions, isP2PBrowserHostname, P2P_BROWSER_PKC_OPTIONS } from '../p2p-browser-config';
+
+describe('p2p-browser-config', () => {
+  it('detects p2p subdomains', () => {
+    expect(isP2PBrowserHostname('p2p.5chan.app')).toBe(true);
+    expect(isP2PBrowserHostname('P2P.5chan.app')).toBe(true);
+    expect(isP2PBrowserHostname('5chan.app')).toBe(false);
+    expect(isP2PBrowserHostname('www.p2p.5chan.app')).toBe(false);
+  });
+
+  it('configures browser PKC options for p2p hostnames', () => {
+    const targetWindow = {
+      location: { hostname: 'p2p.5chan.app' },
+      defaultPkcOptions: {
+        ipfsGatewayUrls: ['https://gateway.example'],
+      },
+    };
+
+    expect(configureP2PBrowserPkcOptions(targetWindow)).toBe(true);
+    expect(targetWindow.defaultPkcOptions).toEqual({
+      ipfsGatewayUrls: ['https://gateway.example'],
+      ...P2P_BROWSER_PKC_OPTIONS,
+    });
+  });
+
+  it('leaves normal hostnames untouched', () => {
+    const defaultPkcOptions = {
+      ipfsGatewayUrls: ['https://gateway.example'],
+    };
+    const targetWindow = {
+      location: { hostname: '5chan.app' },
+      defaultPkcOptions,
+    };
+
+    expect(configureP2PBrowserPkcOptions(targetWindow)).toBe(false);
+    expect(targetWindow.defaultPkcOptions).toBe(defaultPkcOptions);
+  });
+});

src/lib/p2p-browser-config.ts

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+export const P2P_BROWSER_PKC_OPTIONS = {
+  libp2pJsClientsOptions: [{ key: 'libp2pjs' }],
+  httpRoutersOptions: ['https://peers.pleb.bot', 'https://peers.forumindex.com'],
+};
+
+type P2PBrowserConfigWindow = {
+  location: Pick<Location, 'hostname'>;
+  defaultPkcOptions?: Record<string, unknown>;
+};
+
+export const isP2PBrowserHostname = (hostname: string) => hostname.toLowerCase().startsWith('p2p.');
+
+export const configureP2PBrowserPkcOptions = (targetWindow: P2PBrowserConfigWindow = window) => {
+  if (!isP2PBrowserHostname(targetWindow.location.hostname)) {
+    return false;
+  }
+
+  targetWindow.defaultPkcOptions = {
+    ...targetWindow.defaultPkcOptions,
+    libp2pJsClientsOptions: P2P_BROWSER_PKC_OPTIONS.libp2pJsClientsOptions.map((options) => ({ ...options })),
+    httpRoutersOptions: [...P2P_BROWSER_PKC_OPTIONS.httpRoutersOptions],
+  };
+
+  return true;
+};