feat: type errors in definitions

packages/core/src/protobuf/encodePB64.ts

@@ -0,0 +1,5 @@
+import { MessageFns } from '../protos';
+
+export function encodePB64<Type>(message: MessageFns<Type>, data: Type) {
+  return Buffer.from(message.encode(data).finish()).toString('base64');
+}

packages/core/src/protobuf/fetchPB.ts

@@ -0,0 +1,8 @@
+import { MessageFns } from '../protos';
+
+export async function fetchPB<Type>(url: string, message: MessageFns<Type>) {
+  const response = await fetch(url);
+  const buffer = await response.arrayBuffer();
+  const array = new Uint8Array(buffer);
+  return message.decode(array);
+}

packages/core/src/protobuf/index.ts

@@ -0,0 +1,3 @@
+export * from './encodePB64';
+export * from './fetchPB';
+export * from './pbMap';

packages/core/src/protobuf/pbMap.ts

@@ -0,0 +1 @@
+export type PBMap<T> = T[keyof T] extends number ? T[keyof T] : never;