Initial import of zappier-sales-pricing from zapier monorepo

src/nats-billing.js

@@ -0,0 +1,36 @@
+export const SUBJECTS = { STATEMENT_GET: 'verae.billing.statement.get' };
+const PLANE = 'staff';
+
+async function authz(subject) {
+  const http = process.env.AUTHZ_URL;
+  if (!http) return { allow: true, subject };
+  const r = await fetch(`${http.replace(/\/$/, '')}/check`, {
+    method: 'POST',
+    headers: { 'content-type': 'application/json' },
+    body: JSON.stringify({ plane: PLANE, subject }),
+  });
+  return r.json();
+}
+
+export async function billingRequest(subject, payload) {
+  const decision = await authz(subject);
+  if (decision && decision.allow === false) {
+    const err = new Error(decision.reason || 'denied');
+    err.status = 403;
+    throw err;
+  }
+  const url = process.env.NATS_URL;
+  if (!url) return null;
+  try {
+    const { connect, StringCodec } = await import('nats');
+    const nc = await connect({ servers: url.split(','), name: 'zappier-sales-pricing' });
+    const sc = StringCodec();
+    const m = await nc.request(subject, sc.encode(JSON.stringify({ ...payload, plane: PLANE })), { timeout: 2000 });
+    const out = JSON.parse(sc.decode(m.data) || '{}');
+    await nc.close();
+    return out;
+  } catch (err) {
+    if (err.status === 403) throw err;
+    return null;
+  }
+}