/**
 * Check whether network fee should be added to the invoice if on-chain payment is used. ([More information](https://docs.btcpayserver.org/FAQ/FAQ-Stores/#add-network-fee-to-invoice-vary-with-mining-fees))
 */
export declare enum NetworkFeeMode {
    MULTIPLE_PAYMENTS_ONLY = "MultiplePaymentsOnly",
    ALWAYS = "Always",
    NEVER = "Never"
}