連合しているインスタンスを一覧できるように

src/server/api/endpoints/federation/show-instance.ts

@@ -0,0 +1,20 @@
+import $ from 'cafy';
+import define from '../../define';
+import Instance from '../../../../models/instance';
+
+export const meta = {
+	requireCredential: false,
+
+	params: {
+		host: {
+			validator: $.str
+		}
+	}
+};
+
+export default define(meta, (ps, me) => new Promise(async (res, rej) => {
+	const instance = await Instance
+		.findOne({ host: ps.host });
+
+	res(instance);
+}));