Created an Instance Migrator for MongoDB

Extras/mongodb/README.md

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+# Evolution API - MongoDB Instance Migrator
+
+- install the `mongodb` dependency before running this script
+- run the script in this folder
+- restart your Evolution API

Extras/mongodb/instanceMigrator.js

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+// install the mongodb dependency before running this script
+const { MongoClient } = require("mongodb");
+const fs = require("fs");
+const path = require("path");
+
+// Database connection
+const uri = "mongodb://localhost:27017"; // Replace with your MongoDB URI
+const client = new MongoClient(uri);
+
+async function migrate(instanceName) {
+  try {
+    await client.connect();
+
+    const database = client.db("evolution-instances");
+    const collection = database.collection(instanceName);
+
+    // Directory where JSON files are stored
+    const directoryPath = `./instances/${instanceName}`;
+
+    // Reading the creds JSON file
+    const instanceFile = path.join(directoryPath, "creds.json")
+    const instance = JSON.parse(fs.readFileSync(`${instanceFile}`, "utf-8"));
+    // defining the document's _id
+    instance._id = "creds";
+    // Inserting data into MongoDB
+    const result = await collection.insertOne(instance);
+    console.log(`Document saved with _id: ${result.insertedId}`);
+
+    // Reading file names in the directory
+    const files = fs.readdirSync(directoryPath).filter(file => file.startsWith("pre-key"));
+
+    for (const file of files) {
+      const filePath = path.join(directoryPath, file);
+      let instance = JSON.parse(fs.readFileSync(filePath, "utf-8"));
+
+      try {
+        // Inserting data into MongoDB
+        const result = await collection.insertOne(instance);
+        console.log(`Document inserted with _id: ${result.insertedId}`);
+      } catch (error) {
+        // Check if the error is due to a duplicate ID
+        if (error.code === 11000) {
+            console.log(`Ignoring insertion due to duplicate ID: ${instance._id}`);
+        } else {
+            // If the error is for another reason, it will be thrown again
+            throw error;
+        }
+      }
+    }
+  } finally {
+      // Closing the database connection
+      await client.close();
+  }
+}
+
+const instanceName = "my-instance"
+migrate(instanceName).catch(console.dir);