trezor-suite/packages/address-validator/src/eos_validator.js

const { addressType } = require('./crypto/utils');
function isValidEOSAddress(address, currency, networkType) {
    var regex = /^[a-z0-9]+$/g; // Must be numbers and lowercase letters only
    if (address.search(regex) !== -1 && address.length === 12) {
        return true;
    } else {
        return false;
    }
}

module.exports = {
    isValidAddress: function (address, currency, networkType) {
        return isValidEOSAddress(address, currency, networkType);
    },

    getAddressType: function (address, currency, networkType) {
        if (this.isValidAddress(address, currency, networkType)) {
            return addressType.ADDRESS;
        }
        return undefined;
    },
};