@muhammedaksam/sipay-node/dist/esm/utils/index.js

Node.js TypeScript SDK for Sipay payment gateway

import * as crypto from 'crypto';
/**
 * Utility functions for Sipay SDK
 */
/**
 * Generate hash key for payment requests
 * Based on Sipay documentation requirements
 */
export function generateHashKey(merchantKey, invoiceId, amount, secretKey) {
    const hashString = `${merchantKey}${invoiceId}${amount}${secretKey}`;
    return crypto.createHash('sha256').update(hashString).digest('hex');
}
/**
 * Validate credit card number using Luhn algorithm
 */
export function validateCreditCard(cardNumber) {
    const num = cardNumber.replace(/\D/g, '');
    // Check if empty or less than 13 digits
    if (num.length < 13 || num.length > 19) {
        return false;
    }
    let sum = 0;
    let isEven = false;
    for (let i = num.length - 1; i >= 0; i--) {
        let digit = parseInt(num.charAt(i), 10);
        if (isEven) {
            digit *= 2;
            if (digit > 9) {
                digit -= 9;
            }
        }
        sum += digit;
        isEven = !isEven;
    }
    return sum % 10 === 0;
}
/**
 * Format currency amount for Sipay API
 */
export function formatAmount(amount) {
    return amount.toFixed(2);
}
/**
 * Generate a unique invoice ID
 */
export function generateInvoiceId(prefix = 'INV') {
    const timestamp = Date.now();
    const random = Math.floor(Math.random() * 10000);
    return `${prefix}${timestamp}${random}`;
}
/**
 * Validate required payment fields
 */
export function validatePaymentData(data) {
    const errors = [];
    const requiredFields = [
        'cc_holder_name',
        'cc_no',
        'expiry_month',
        'expiry_year',
        'currency_code',
        'invoice_id',
        'total',
        'name',
        'surname',
        'items',
    ];
    for (const field of requiredFields) {
        if (!data[field]) {
            errors.push(`Missing required field: ${field}`);
        }
    }
    // Validate credit card
    if (data.cc_no && !validateCreditCard(data.cc_no)) {
        errors.push('Invalid credit card number');
    }
    // Validate amount
    if (data.total && (isNaN(data.total) || data.total <= 0)) {
        errors.push('Invalid amount');
    }
    // Validate currency
    const validCurrencies = ['TRY', 'USD', 'EUR'];
    if (data.currency_code && !validCurrencies.includes(data.currency_code)) {
        errors.push('Invalid currency code');
    }
    // Validate expiry
    if (data.expiry_month) {
        const month = parseInt(data.expiry_month, 10);
        if (isNaN(month) || month < 1 || month > 12) {
            errors.push('Invalid expiry month');
        }
    }
    if (data.expiry_year) {
        const year = parseInt(data.expiry_year, 10);
        const currentYear = new Date().getFullYear();
        if (isNaN(year) || year < currentYear || year > currentYear + 20) {
            errors.push('Invalid expiry year');
        }
    }
    return errors;
}
/**
 * Mask credit card number for logging
 */
export function maskCreditCard(cardNumber) {
    const num = cardNumber.replace(/\D/g, '');
    if (num.length <= 3) {
        return '*'.repeat(num.length);
    }
    if (num.length <= 7) {
        const firstThree = num.substring(0, 3);
        const middle = '*'.repeat(num.length - 4);
        const lastOne = num.substring(num.length - 1);
        return `${firstThree}${middle}${lastOne}`;
    }
    const firstFour = num.substring(0, 4);
    const lastFour = num.substring(num.length - 4);
    const middle = '*'.repeat(Math.max(0, num.length - 8));
    return `${firstFour}${middle}${lastFour}`;
}
/**
 * Parse Sipay error response
 */
export function parseSipayError(error) {
    if (error.response?.data) {
        return {
            code: error.response.data.status_code || 0,
            message: error.response.data.status_description || error.response.data.message || 'Unknown error',
        };
    }
    return {
        code: 0,
        message: error.message || 'Network error',
    };
}
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