Add cast gateway wrapper

packages/shared/network/cast.ts

@@ -0,0 +1,51 @@
+import { logError } from '../sentry';
+import HTTPService from './HTTPService';
+import { getEndpoint } from './api';
+
+class CastGateway {
+    constructor() {
+        console.log('CastGateway');
+    }
+
+    public async getCastData(code: string): Promise<string> {
+        let resp;
+        try {
+            resp = await HTTPService.get(`${getEndpoint()}/kex/get`, {
+                identifier: `${code}_payload`,
+            });
+        } catch (e) {
+            logError(e, 'failed to getCastData');
+            throw e;
+        }
+        return resp.data.wrappedKey;
+    }
+
+    public async getPublicKey(code: string): Promise<string> {
+        let resp;
+        try {
+            resp = await HTTPService.get(`${getEndpoint()}/kex/get`, {
+                identifier: `${code}_pubkey`,
+            });
+        } catch (e) {
+            logError(e, 'failed to getPublicKey');
+            throw e;
+        }
+        return resp.data.wrappedKey;
+    }
+
+    public async advertisePublicKey(code: string, publicKey: string) {
+        await HTTPService.put(getEndpoint() + '/kex/add', {
+            customIdentifier: `${code}_pubkey`,
+            wrappedKey: publicKey,
+        });
+    }
+
+    public async publishCastPayload(code: string, castPayload: string) {
+        await HTTPService.put(getEndpoint() + '/kex/add', {
+            customIdentifier: `${code}_payload`,
+            wrappedKey: castPayload,
+        });
+    }
+}
+
+export default new CastGateway();