abavalidator/dist/aba-validation.js

A validation module for browsers and Node.js to validate an American Bankers Association Routing Number used in ACH payments.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.validate = void 0;
function validate(routingNumber) {
    var match = routingNumber.match(/^\s*([\d]{9})\s*$/);
    if (!match) {
        return false;
    }
    var weights = [3, 7, 1];
    var aba = match[1];
    var sum = 0;
    for (var i = 0; i < 9; ++i) {
        sum += +aba.charAt(i) * weights[i % 3];
    }
    return (sum !== 0 && sum % 10 === 0);
}
exports.validate = validate;