thawani-nodejs/dist/resources/webhooks.js

Node.js library for Thawani Payment Gateway

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.WebhookHandler = void 0;
const crypto_1 = require("crypto");
class WebhookHandler {
    constructor(webhookSecret) {
        this.webhookSecret = webhookSecret;
    }
    verifySignature(event) {
        try {
            const calculatedSignature = this.calculateSignature(event.body + '-' + event.timestamp, this.webhookSecret);
            return calculatedSignature === event.signature;
        }
        catch (error) {
            return false;
        }
    }
    calculateSignature(payload, secret) {
        const hmac = (0, crypto_1.createHmac)('sha256', secret);
        hmac.update(payload);
        return hmac.digest('hex');
    }
    constructEvent(body, signature, timestamp) {
        const event = {
            body,
            signature,
            timestamp
        };
        if (!this.verifySignature(event)) {
            throw new Error('Invalid webhook signature');
        }
        return event;
    }
}
exports.WebhookHandler = WebhookHandler;
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