get-plaid-key.ts

const PLAID_KEYS = ["CLIENT_ID", "PUBLIC_KEY", "SECRET_KEY"] as const;

const PREFIX = 'PLAID_'
const POST_FIX =
  process.env.NODE_ENV === "development"
    ? "_DEV"
    : process.env.NODE_ENV === "production"
    ? ""
    : "_TEST";

export function getPlaidKey(keyId: typeof PLAID_KEYS[number]): string {
  const name = PREFIX + keyId + POST_FIX;
  const key = process.env[name];
  if (key === undefined) {
    throw new Error(`Missing ${name} environment variable`);
  }
  return key;
}