import { CustomError } from "ts-custom-error";
import { IContract } from "../../chain/contract";
import { ShielderTransaction, StateManager } from "../../shielder/state";
import { Mutex } from "async-mutex";
export declare class UnexpectedVersionInEvent extends CustomError {
    constructor(message: string);
}
export declare class StateSynchronizer {
    contract: IContract;
    stateManager: StateManager;
    syncCallback?: (shielderTransaction: ShielderTransaction) => unknown;
    mutex: Mutex;
    constructor(stateManager: StateManager, contract: IContract, syncCallback?: (shielderTransaction: ShielderTransaction) => unknown);
    /**
     * Syncs the shielder state with the blockchain.
     * Emits the synced shielder transactions to the callback.
     * Locks to prevent concurrent storage changes.
     */
    syncAccountState(): Promise<void>;
    /**
     * Returns all the shielder transactions of the private account.
     * Note: This method is not efficient and should be used carefully.
     */
    getShielderTransactions(): AsyncGenerator<ShielderTransaction, void, unknown>;
    private getNullifier;
    private getNoteEventForBlock;
    /**
     * Finds the next state transition event for the given state, emitted in shielder contract.
     * @param state - account state
     * @returns the next state transition event
     * @throws UnexpectedVersionInEvent
     */
    private findStateTransitionEvent;
}