initial import

src/config.ts

@@ -0,0 +1,48 @@
+import { config as loadDotenv } from "dotenv";
+import { homedir } from "os";
+import { join } from "path";
+
+
+// Load global config first (~/.config/gmgn/.env), then project .env (project takes precedence)
+loadDotenv({ path: join(homedir(), ".config", "gmgn", ".env") });
+loadDotenv({ override: true });
+
+export interface Config {
+  apiKey: string;
+  privateKeyPem?: string;
+  host: string;
+}
+
+let _config: Config | null = null;
+
+export function getConfig(requirePrivateKey = false): Config {
+  if (_config) {
+    if (requirePrivateKey && !_config.privateKeyPem) {
+      die("GMGN_PRIVATE_KEY is required for swap/order commands");
+    }
+    return _config;
+  }
+
+  const apiKey = process.env.GMGN_API_KEY;
+  if (!apiKey) {
+    die("GMGN_API_KEY is required. Set it in your .env file or environment.");
+  }
+
+  let privateKeyPem: string | undefined;
+  const privateKey = process.env.GMGN_PRIVATE_KEY;
+  if (privateKey) {
+    // Support escaped newlines (e.g. from single-line .env values)
+    privateKeyPem = privateKey.replace(/\\n/g, "\n");
+  } else if (requirePrivateKey) {
+    die("GMGN_PRIVATE_KEY is required for swap/order commands");
+  }
+
+  const host = process.env.GMGN_HOST ?? "https://openapi.gmgn.ai";
+  _config = { apiKey: apiKey!, privateKeyPem, host };
+  return _config;
+}
+
+function die(msg: string): never {
+  console.error(`[gmgn-cli] Error: ${msg}`);
+  process.exit(1);
+}