From 326caf949ec8622c04b0e3352c5eac5370f161e4 Mon Sep 17 00:00:00 2001
From: Pawel Zelawski <pawel.zelawski@outlook.com>
Date: Thu, 10 Apr 2025 10:50:57 +0200
Subject: feat(server): implement basic backend API

- Added basic Express server setup in `src/server/main.ts`.
- Configured `dotenv` to load environment variables.
- Implemented in-memory storage for session state (pending, success, failed).
- Created `/api/digiid/start` endpoint:
    - Generates session ID and nonce.
    - Constructs callback URL from `PUBLIC_URL`.
    - Determines `unsecure` flag based on URL scheme.
    - Stores initial session state.
    - Generates QR code data URL.
    - Returns `sessionId` and `qrCodeDataUrl`.
    - Includes placeholder for `digiidTs.generateDigiIDUri`.
- Created `/api/digiid/callback` endpoint:
    - Receives address, uri, signature from DigiID app.
    - Parses nonce from received URI.
    - Looks up session by nonce.
    - Reconstructs expected callback URL.
    - Updates session state based on placeholder verification.
    - Includes placeholder for `digiidTs.verifyDigiIDCallback`.
    - Responds 200 OK as per DigiID protocol.
- Created `/api/digiid/status/:sessionId` endpoint:
    - Retrieves and returns session status, address, and error.
- Added address type helper `getDigiByteAddressType` in `src/server/utils.ts` (with placeholder logic for DGA).
- Added `dev:backend` script to `package.json` using `nodemon` and `ts-node/esm`.
- Added `"type": "module"` to `package.json`.
- Installed `@types/dotenv`.
- (Note: Outstanding TypeScript linter errors related to async Express handlers require further investigation).
---
 package.json | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'package.json')

diff --git a/package.json b/package.json
index b0e3c03..9224785 100644
--- a/package.json
+++ b/package.json
@@ -3,8 +3,10 @@
   "version": "1.0.0",
   "description": "",
   "main": "index.js",
+  "type": "module",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "dev:backend": "nodemon --watch src/server --ext ts --exec \"node --loader ts-node/esm src/server/main.ts\""
   },
   "repository": {
     "type": "git",
@@ -18,6 +20,7 @@
   },
   "homepage": "https://github.com/pawelzelawski/digiid-ts-demo#readme",
   "devDependencies": {
+    "@types/dotenv": "^6.1.1",
     "@types/express": "^5.0.1",
     "@types/node": "^22.14.0",
     "@types/qrcode": "^1.5.5",
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