export declare class ReceiptUtility {
    /**
     * Extracts a transaction id from an encoded App Receipt. Throws if the receipt does not match the expected format.
     * *NO validation* is performed on the receipt, and any data returned should only be used to call the App Store Server API.
     * @param appReceipt The unmodified app receipt
     * @returns A transaction id from the array of in-app purchases, null if the receipt contains no in-app purchases
     */
    extractTransactionIdFromAppReceipt(appReceipt: string): string | null;
    /**
     * Extracts a transaction id from an encoded transactional receipt. Throws if the receipt does not match the expected format.
     * *NO validation* is performed on the receipt, and any data returned should only be used to call the App Store Server API.
     * @param transactionReceipt The unmodified transactionReceipt
     * @return A transaction id, or null if no transactionId is found in the receipt
     */
    extractTransactionIdFromTransactionReceipt(transactionReceipt: string): string | null;
}