growwapi/dist/resources/auth.js

NodeJS SDK for Groww trading APIs

import * as OTPAuth from 'otpauth';
import { AUTH_URL, SOCKET_TOKEN_URL } from '../config';
let accessToken = null;
let currentTokenRequest = null;
export class Auth {
    static async getAccessToken() {
        if (accessToken) {
            if (new Date() < new Date(accessToken.expiry)) {
                return accessToken.token;
            }
        }
        if (currentTokenRequest) {
            return currentTokenRequest;
        }
        currentTokenRequest = (async () => {
            const response = await Auth.createAccessToken();
            if (!response.ok) {
                throw new Error(`Failed to create access token: ${response.statusText}, Status Code: ${response.status}, Response: ${await response.text()}`);
            }
            const data = await response.json();
            accessToken = data;
            return accessToken?.token;
        })();
        try {
            return await currentTokenRequest;
        }
        finally {
            currentTokenRequest = null;
        }
    }
    static async socketAccessToken(publicKey) {
        const token = await Auth.getAccessToken();
        const response = await fetch(SOCKET_TOKEN_URL, {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({
                socketKey: publicKey,
            }),
        });
        const result = await response.json();
        return response.ok ? result : Promise.reject(new Error(`Failed to create socket access token: ${response.statusText}, Status Code: ${response.status}, Response: ${await response.text()}`));
    }
    static async createAccessToken() {
        return await fetch(AUTH_URL, {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${process.env.GROWW_API_KEY}`,
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({
                totp: Auth.generateTOTP(),
            }),
        });
    }
    static generateTOTP() {
        const secret = OTPAuth.Secret.fromBase32(process.env.GROWW_API_SECRET || '');
        return new OTPAuth.TOTP({
            secret: secret,
            algorithm: 'SHA1',
            digits: 6,
            period: 30,
        }).generate();
    }
}