import { AccountTransactionHeader, Base58String } from '../../index.js';
import { AccountAddress, Energy } from '../../types/index.js';
/**
 * Transaction header for the intermediary state of account transactions, i.e. prior to being signing.
 */
export type Header = Partial<AccountTransactionHeader> & {
    /** a base energy amount, this amount excludes transaction size and signature costs */
    executionEnergyAmount: Energy.Type;
    /** The number of signatures the transaction can hold. If `undefined`, this will be defined at the time of signing. */
    numSignatures?: bigint;
    sponsor?: SponsorDetails;
};
type SponsorDetails = {
    account: AccountAddress.Type;
    /** The number of signatures the transaction can hold. */
    numSignatures: bigint;
};
export type HeaderJSON = {
    sender?: Base58String;
    nonce?: bigint;
    expiry?: number;
    executionEnergyAmount: bigint;
    numSignatures?: number;
    sponsor?: SponsorDetailsJSON;
};
type SponsorDetailsJSON = {
    account: Base58String;
    numSignatures: number;
};
export declare function headerToJSON(header: Header): HeaderJSON;
export declare function headerFromJSON(json: unknown): Header;
export {};