import { BlockReference } from '@near-js/types';
export declare class BlockQuery {
    private readonly reference;
    private constructor();
    static fromReference(reference: BlockReference): BlockQuery;
    toReference(): BlockReference;
    /**
     * Query at optimistic block
     */
    static get OPTIMISTIC(): BlockQuery;
    /**
     * Query at doomslug final block
     */
    static get DOOMSLUG(): BlockQuery;
    /**
     * Query at final block
     */
    static get FINAL(): BlockQuery;
    /**
     * Query at earliest available block
     */
    static get EARLIEST(): BlockQuery;
    /**
     * Query at genesis block
     */
    static get GENESIS(): BlockQuery;
    /**
     * Query at certain block with block height
     */
    static height(height: number): BlockQuery;
    /**
     * Query at certain block with block hash
     */
    static hash(hash: string): BlockQuery;
    /**
     * Convert block query to that with certain block height.
     * This is useful when need multiple queries at the same block
     *
     * @example
     * const blockQuery = BlockQuery.FINAL;
     *
     * const supply1: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     *
     * // supply2 may not be equal to supply1 because they may be queried at different block
     * const supply2: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     *
     *@example
     * const blockQuery = await BlockQuery.FINAL.height(provider);
     *
     * const supply1: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     *
     * // supply2 must be equal to supply1 because they are queried at the same block
     * const supply2: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     */
    height(provider: BlockQueryProvider): Promise<BlockQuery>;
    /**
     * Convert block query to that with certain block hash.
     * This is useful when need multiple queries at the same block
     *
     * @example
     * const blockQuery = BlockQuery.FINAL;
     *
     * const supply1: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     *
     * // supply2 may not be equal to supply1 because they may be queried at different block
     * const supply2: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     *
     *@example
     * const blockQuery = await BlockQuery.FINAL.hash(provider);
     *
     * const supply1: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     *
     * // supply2 must be equal to supply1 because they are queried at the same block
     * const supply2: string = await account.view({
     *   contractId: 'wrap.near',
     *   methodName: 'ft_total_supply',
     *   blockQuery
     * });
     */
    hash(provider: BlockQueryProvider): Promise<BlockQuery>;
}
export type BlockWithHeader = {
    header: {
        height: number;
        hash: string;
    };
};
export interface BlockQueryProvider {
    block(reference: BlockReference): Promise<BlockWithHeader>;
}