import type { GearApi } from '../../GearApi';
import type { HexString, Proof } from '../../types';
import { GearEthBridgeEvents } from './events';
import { GearEthBridgeTransactions } from './tx';
/**
 * API for interacting with the Gear-Ethereum bridge pallet.
 *
 * Provides access to bridge state queries, transaction building, and event monitoring.
 * The bridge enables bidirectional message passing between Gear and Ethereum networks.
 */
export declare class GearEthBridge {
    private _api;
    /** Transaction building utilities for bridge operations */
    readonly tx: GearEthBridgeTransactions;
    /** Event monitoring and filtering utilities */
    readonly events: GearEthBridgeEvents;
    constructor(_api: GearApi);
    /**
     * Get the merkle proof for a given hash.
     * @param hash The hash of the message to get the merkle proof for.
     * @param at (optional) The block hash to query at.
     * @returns The merkle proof.
     */
    merkleProof(hash: HexString | Uint8Array, at?: HexString | Uint8Array): Promise<Proof>;
    /**
     * Get the current authority set hash.
     *
     * @returns The authority set hash as a hex string
     * @throws {AuthoritySetHashError} When the authority set hash is not available
     */
    authoritySetHash(): Promise<HexString>;
    /**
     * Get the current clear timer value.
     *
     * @returns The clear timer value as a number
     * @throws {ClearTimerError} When the clear timer is not available
     */
    clearTimer(): Promise<number>;
    /**
     * Check if the bridge has been initialized.
     *
     * @returns True if the bridge is initialized, false otherwise
     */
    isInitialized(): Promise<boolean>;
    /**
     * Get the current message nonce.
     *
     * @returns The current message nonce as a bigint
     */
    getMessageNonce(): Promise<bigint>;
    /**
     * Check if the bridge is currently paused.
     *
     * When paused, the bridge will not process new messages.
     *
     * @returns True if the bridge is paused, false otherwise
     */
    isPaused(): Promise<boolean>;
    /**
     * Get the current message queue.
     *
     * Returns an array of message hashes that are queued for processing.
     *
     * @returns Array of message hashes in the queue
     */
    getQueue(): Promise<Array<HexString>>;
    /**
     * Check if the message queue has changed.
     *
     * @returns True if the queue has changed, false otherwise
     */
    isQueueChanged(): Promise<boolean>;
    /**
     * Get the merkle root of the current message queue.
     *
     * @returns The queue merkle root as a hex string
     * @throws {GetQueueMerkleRootError} When the merkle root is not available
     */
    getQueueMerkleRoot(): Promise<HexString>;
    /**
     * Get the current sessions timer value.
     *
     * @returns The sessions timer value as a number
     */
    getSessionsTimer(): Promise<number>;
    /**
     * Get the maximum allowed payload size for bridge messages.
     *
     * @returns The maximum payload size in bytes
     */
    get maxPayloadSize(): number;
    /**
     * Get the maximum capacity of the message queue.
     *
     * @returns The queue capacity as a number of messages
     */
    get queueCapacity(): number;
    /**
     * Get the number of sessions per era.
     *
     * @returns The number of sessions per era
     */
    get sessionsPerEra(): number;
}