@sotatech/nest-quickfix/dist/protocol/parser/checksum.validator.js

A powerful NestJS implementation of the FIX (Financial Information eXchange) protocol. Provides high-performance, reliable messaging for financial trading applications with built-in session management, message validation, and recovery mechanisms.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ChecksumValidator = void 0;
const fields_1 = require("../../fields");
class ChecksumValidator {
    static validate(message) {
        const checksum = message.getField(fields_1.Fields.CheckSum);
        const calculatedChecksum = this.calculateChecksum(message);
        return checksum === calculatedChecksum;
    }
    static calculateChecksum(message) {
        let messageString = '';
        message.getAllFields().forEach((value, field) => {
            if (field !== fields_1.Fields.CheckSum) {
                messageString += `${field}=${value}${this.SOH}`;
            }
        });
        let sum = 0;
        for (let i = 0; i < messageString.length; i++) {
            sum += messageString.charCodeAt(i);
        }
        sum = sum % 256;
        return sum.toString().padStart(3, '0');
    }
}
exports.ChecksumValidator = ChecksumValidator;
ChecksumValidator.SOH = '\x01';
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