import { Config } from '../../fileStores';
import { BlockHeader } from '../../primitives';
import { Transaction } from '../../primitives/transaction';
import { WorkerPool } from '../../workerPool';
import { DecryptedNote, DecryptNotesOptions } from '../../workerPool/tasks/decryptNotes';
import { Account } from '../account/account';
export type DecryptNotesFromTransactionsCallback = (account: Account, blockHeader: BlockHeader, transactions: Array<{
    transaction: Transaction;
    decryptedNotes: Array<DecryptedNote>;
}>) => Promise<void>;
export declare class BackgroundNoteDecryptor {
    private isStarted;
    private triggerFlushed;
    private triggerStopped;
    private onFlushed;
    private onStopped;
    private readonly workerPool;
    private readonly options;
    private readonly decryptQueue;
    private accounts;
    private sharedAccountKeys;
    constructor(workerPool: WorkerPool, config: Config, options: DecryptNotesOptions);
    start(abort?: AbortController): void;
    stop(): void;
    private decryptLoop;
    /**
     * Waits for all the in flight decrypt requests to be fully processed.
     */
    flush(): Promise<void>;
    decryptNotesFromBlock(blockHeader: BlockHeader, transactions: ReadonlyArray<Transaction>, accounts: ReadonlyArray<Account>, callback: DecryptNotesFromTransactionsCallback): Promise<void>;
    private updateAccounts;
}
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