WIP

packages/bff-graphql-poc/package.json

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+{
+  "name": "bff-graphql-poc",
+  "scripts": {
+    "dev": "nodemon --watch 'src/**' --ext 'ts' --exec './src/index.ts'"
+  },
+  "dependencies": {
+    "@fastify/websocket": "^9.0.0",
+    "@tsconfig/node20": "^20.1.2",
+    "fastify": "^4.26.1",
+    "graphql": "^16.8.1",
+    "graphql-http": "^1.22.0",
+    "graphql-ws": "^5.15.0",
+    "nexus": "^1.3.0",
+    "nodemon": "^3.0.3"
+  },
+  "devDependencies": {
+    "ts-node": "^10.9.1",
+    "typescript": "^5.3.3"
+  },
+  "type": "module"
+}

packages/bff-graphql-poc/src/index.ts

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+#!/usr/bin/env -S node --no-warnings=ExperimentalWarning --loader ts-node/esm
+import Fastify from 'fastify';
+import fastifyWebsocket from '@fastify/websocket'; 
+import { makeHandler } from 'graphql-ws/lib/use/@fastify/websocket';
+import { createHandler } from 'graphql-http/lib/use/fastify';
+import { schema } from './schema.ts';
+
+const port = 4000;
+const app = Fastify();
+app.get('/', async function handler (request, reply) {
+  return { hello: 'world' }
+});
+
+app.register(fastifyWebsocket);
+
+app.register(async (fastify) => {
+  fastify.get('/graphql', { websocket: true }, makeHandler({ schema }));
+});
+
+app.post('/graphql', createHandler({ schema }));
+
+app.listen({ port });
+console.log(`Listening to port ${port}`);

packages/bff-graphql-poc/src/schema.ts

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+import { makeSchema, objectType } from 'nexus';
+
+const Query = objectType({
+  name: 'Query',
+  definition(t) {
+    t.field('hello', {
+      type: 'String',
+      resolve: () => {
+        return 'Hello!';
+      },
+    });
+  },
+});
+
+export const schema = makeSchema({
+	types: [Query]
+});

packages/bff-graphql-poc/tsconfig.json

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+{
+  "extends": "@tsconfig/node20/tsconfig.json",
+
+  "ts-node": {
+    "transpileOnly": true,
+    "files": true,
+
+    "compilerOptions": {
+    }
+  },
+  "compilerOptions": {
+	}
+}