AWS Parameter Store source example

This example follows the Varia Source contract discussed previously. The configured path is the hierarchy before the key; the key passed to Varia is always appended as the final segment.

import { Varia } from "varia";
import { awsParameterStore } from "@varia/aws-parameter-store";

const varia = new Varia({
  sources: [
    awsParameterStore({
      region: "ap-northeast-1",
      path: "/teyvat/prod/api-natsuneko-com",
    }),
  ],
});

const value = await varia.require("xxx");
// Reads /teyvat/prod/api-natsuneko-com/xxx

The AWS SDK uses its normal credential provider chain. WithDecryption is enabled by default, so the same source supports String, StringList, and SecureString values. Set withDecryption: false only when decryption is not wanted.

Only AWS's ParameterNotFound response becomes undefined. Other AWS errors are thrown so Varia does not silently fall back when infrastructure is broken.

In the real monorepo, replace src/source.ts with imports of Source, SourceOptions, and ResolveContext from the core varia package.