public code v1

verifier/core

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+../core

verifier/index.js

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+require('dotenv').config()
+const {Express} = require("./core/Express");
+const { createSign, createPrivateKey, createPublicKey, generateKeyPairSync } = require("node:crypto");
+
+// Import keys
+const fs = require('fs');
+let keys = JSON.parse(fs.readFileSync(__dirname+"/keys.json", 'utf8'));
+privateKey = createPrivateKey({
+    key: keys.privateKey,
+    type: "pkcs8",
+    format: "pem",
+});
+
+const express = new Express(process.env.PORT_VERIFIER, "Verifier")
+express.get('/', (_, res) => {
+    res.send('Service is alive')
+});
+
+express.post('/verify', (req, res) => {
+
+    if (!req.body.token || req.body.token !== process.env.API_TOKEN_VERIFIER) {
+        res.status(401).send('Not authorized');
+    } else {
+        if (!req.body.message) {
+            res.status(403).send("Bad request");
+        } else {
+            let message = req.body.message;
+
+            const sign = createSign("SHA256");
+            sign.write(JSON.stringify(message));
+            sign.end();
+            const signature = sign.sign(privateKey, "hex");
+            message.value.verifierSign = signature;
+            message.value.verifierSignDatetime = new Date().getTime();
+
+            console.log("Event Verified with signature: " + signature);
+            res.status(200).send(message);
+        }
+    }
+});
+express.run();

verifier/keys.json

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+{
+  "privateKey": "-----BEGIN PRIVATE KEY-----\nMH4CAQAwEAYHKoZIzj0CAQYFK4EEAAMEZzBlAgEBBB4ZmdYNf803bxRz3xL1xnDS\nXv1v+Dfwc6wRRLbJ+FehQAM+AAQuAPvrX/vQiNsm0yQvMZET1nA0jfJBLo2c0ygE\nlPNNIra6yO5Y+PjFa+rCIlDH8W+s894BJLH9ylJWai4=\n-----END PRIVATE KEY-----\n",
+  "publicKey": "-----BEGIN PUBLIC KEY-----\nMFIwEAYHKoZIzj0CAQYFK4EEAAMDPgAELgD761/70IjbJtMkLzGRE9ZwNI3yQS6N\nnNMoBJTzTSK2usjuWPj4xWvqwiJQx/FvrPPeASSx/cpSVmou\n-----END PUBLIC KEY-----\n"
+}

verifier/package-lock.json

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+{
+  "name": "verifier",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "verifier",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "dotenv": "^16.0.3"
+      }
+    },
+    "node_modules/dotenv": {
+      "version": "16.0.3",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.0.3.tgz",
+      "integrity": "sha512-7GO6HghkA5fYG9TYnNxi14/7K9f5occMlp3zXAuSxn7CKCxt9xbNWG7yF8hTCSUchlfWSe3uLmlPfigevRItzQ==",
+      "engines": {
+        "node": ">=12"
+      }
+    }
+  },
+  "dependencies": {
+    "dotenv": {
+      "version": "16.0.3",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.0.3.tgz",
+      "integrity": "sha512-7GO6HghkA5fYG9TYnNxi14/7K9f5occMlp3zXAuSxn7CKCxt9xbNWG7yF8hTCSUchlfWSe3uLmlPfigevRItzQ=="
+    }
+  }
+}

verifier/package.json

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+{
+  "name": "verifier",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "dotenv": "^16.0.3"
+  }
+}