Tcdx Generate Signature In NodeJs

"use strict";
const crypto = require('crypto');
const _ = require('lodash');
const axios = require("axios");
const API_KEY = '<API_KEY>';
const API_SECRET = '<SECRET_KEY>';
class Tcdx{

    constructor(sandbox) {
        this.key = API_KEY;
        this.secret = API_SECRET;

        this.baseUrl = `http://147.139.135.182`;
    }

    createRequestConfig({ key, secret, payload }) {

        const encodedPayload = JSON.stringify(payload);

        const signature = crypto
            .createHmac(`sha256`, secret)
            .update(encodedPayload)
            .digest(`hex`);

        return {
            headers: {
                'X-TC-APIKEY': key,
                'X-TC-SIGNATURE': signature,
            },
        };
    }

    requestPrivate(endpoint, method, params = {}) {
        if (!this.key || !this.secret) {
            throw new Error(
                `API key and secret key required to use authenticated methods`);
        }

        const requestPath = `/${endpoint}`;
        const requestUrl = `${this.baseUrl}${requestPath}`;
        let payload = {
            timestamp: Date.now()
        };
        payload = _.assign(payload, params);
        const config = this.createRequestConfig({
            payload,
            key: this.key,
            secret: this.secret,
        });

        if (method === 'post'){
            return new Promise(function (resolve, reject) {
                axios.post(requestUrl, {}, config)
                    .then(function (response) {
                        resolve(response.data);
                    }).catch(function (err) {
                        reject(err.response.data.message);
                    });
            });
        }else if (method === 'get'){
            return new Promise(function (resolve, reject) {
                axios.get(requestUrl, config)
                    .then(function (response) {
                        resolve(response.data);
                    }).catch(function (err) {
                        reject(err.response.data.message);
                    });
            });
        }

    }

    async getKyc() {
        try {
            let account = await this.requestPrivate('/kyc', 'get',{});
            return account;
        } catch (error) {
            throw error;
        }
    }
}

module.exports = new Tcdx();

async function main(){
    let kycData= await module.exports.getKyc();
    console.log(kycData);
}

main();