import BN from 'bn.js';
import * as types from '../types';
export interface ObservationFields {
    /** The block timestamp of the observation */
    blockTimestamp: number;
    /** the price of the observation timestamp, Q64.64 */
    sqrtPriceX64: BN;
    /** the cumulative of price during the duration time, Q64.64 */
    cumulativeTimePriceX64: BN;
    /** padding for feature update */
    padding: BN;
}
export interface ObservationJSON {
    /** The block timestamp of the observation */
    blockTimestamp: number;
    /** the price of the observation timestamp, Q64.64 */
    sqrtPriceX64: string;
    /** the cumulative of price during the duration time, Q64.64 */
    cumulativeTimePriceX64: string;
    /** padding for feature update */
    padding: string;
}
/** The element of observations in ObservationState */
export declare class Observation {
    /** The block timestamp of the observation */
    readonly blockTimestamp: number;
    /** the price of the observation timestamp, Q64.64 */
    readonly sqrtPriceX64: BN;
    /** the cumulative of price during the duration time, Q64.64 */
    readonly cumulativeTimePriceX64: BN;
    /** padding for feature update */
    readonly padding: BN;
    constructor(fields: ObservationFields);
    static layout(property?: string): any;
    static fromDecoded(obj: any): types.Observation;
    static toEncodable(fields: ObservationFields): {
        blockTimestamp: number;
        sqrtPriceX64: BN;
        cumulativeTimePriceX64: BN;
        padding: BN;
    };
    toJSON(): ObservationJSON;
    static fromJSON(obj: ObservationJSON): Observation;
    toEncodable(): {
        blockTimestamp: number;
        sqrtPriceX64: BN;
        cumulativeTimePriceX64: BN;
        padding: BN;
    };
}