symbol eth payment checked

src/app.js

@@ -0,0 +1,32 @@
+const fs = require("fs")
+
+function loadConfig() {
+    const configPath = "./config.json";
+    if (!fs.existsSync(configPath)) {
+        throw new Error("Configuration file not found: " + configPath);
+    }
+    const configContent = fs.readFileSync(configPath, "utf-8");
+    if (!configContent) {
+        throw new Error("Configuration file is empty: " + configPath);
+    }
+    try {
+        return JSON.parse(configContent);
+    } catch (error) {
+        throw new Error("Error parsing configuration file: " + error.message);
+    }
+}
+
+class App {
+    constructor(){
+        const config = loadConfig();
+        this.ethNodeUrl = config.nodesUrl.ETH
+        const usdterc20_abi = JSON.parse(fs.readFileSync(config.abiPath.usdt_erc20_abi, "utf-8"));
+        const usdcerc20_abi = JSON.parse(fs.readFileSync(config.abiPath.usdc_erc20_abi, "utf-8"));
+        const usdttrc20_abi = JSON.parse(fs.readFileSync(config.abiPath.usdt_trc20_abi, "utf-8"));
+        this.abis = {usdcerc20_abi, usdterc20_abi, usdttrc20_abi};
+    }
+}
+
+const app = new App();
+
+module.exports = app;