export declare class ValidateTx {
    /**
     * Given a base 64 encoded sponsored transaction bytes, returns true
     * if all the transactions in the block are whitelisted to be sponsored
     * by bluefin dec
     * @param txBytesB64 base 64 sponsored tx block bytes
     * @returns true/false
     */
    static isWhitelistedForSponsor(txBytesB64: string): boolean;
}