Add functionality to create transactions

- Transactions work against the account balance
- Needs helper functions for users
- Needs more testing

libStorage.js

@@ -187,30 +187,60 @@ exports.UserStorage = class UserStorage extends Storage {
             }
         })
     }
+    
+    /**
+     * Update a user's account Balance
+     * 
+     * @param {string} _updateType The type of update to make to the account [ withdraw | deposit ]
+     * @param {number} _updateAmount The amount to update the account
+     * @param {number} _account_id The ID of the account to update
+     * @param {function} callback The callback function to call with the results
+     * @returns Result from the SQL query or false
+     */
+    updateBalance(_updateType, _updateAmount, _account_id, callback){
+        var sqlQuery = "";
+        switch(_updateType){
+            case "withdraw":
+                // Code here to withdraw funds
+                sqlQuery = `UPDATE ${this.dbTable} SET balance=balance-${_updateAmount};`;
+                break;
+            case "deposit":
+                // Code here to withdraw funds
+                sqlQuery = `UPDATE ${this.dbTable} SET balance=balance+${_updateAmount};`;
+                break;
+            default:
+                log.ERROR('Update type not valid: ', _updateType);
+                return callback(new Error("Update type not valid"));
+        }
+        
+        if(!sqlQuery) return callback(new Error("SQL Query empty"), undefined);
 
-    updateBalance(){
-
+        runSQL(sqlQuery, this.connection, (err, rows) => {
+            if (err) return callback(err, undefined);
+            if (rows?.affectedRows > 0) return callback(undefined, rows);
+            return callback(undefined, undefined);
+        })  
     }
 }
-/*
+
 exports.TransactionStorage = class TransactionStorage extends Storage {
     constructor() {
         super(transactionsTable);
     }
     
     createTransaction(transaction, callback){
-        const sqlQuery  = `INSERT INTO ${this.dbTable} () VALUES ('${}');`;
+        var sqlQuery  = `INSERT INTO ${this.dbTable} (transaction_id, account_id, discord_tokens_used, provider_tokens_used, provider_id, order_date) VALUES ('${transaction.transaction_id}', '${transaction.account_id}', '${transaction.discord_tokens_used}', '${transaction.provider_tokens_used}', '${transaction.provider_id}', '${returnMysqlTime()}');`;
 
         log.DEBUG(`Adding new entry with SQL query: '${sqlQuery}'`)
 
         runSQL(sqlQuery, this.connection, (err, rows) => {
             if (err) return callback(err, undefined);
-            if (rows[0]?.id) return callback(undefined, rows);
+            if (rows?.affectedRows > 0) return callback(undefined, rows);
             return callback(undefined, undefined);
         })        
     }            
 }
-*/
+
 exports.FeedStorage = class FeedStorage extends Storage {
     constructor() {
         super(rssFeedsTable);