import ITransactionStore from '../core/interfaces/ITransactionStore';
import TransactionModel from './models/TransactionModel';
/**
 * Implementation of ITransactionStore that stores the transaction data in a MongoDB database.
 */
export default class MongoDbTransactionStore implements ITransactionStore {
    private serverUrl;
    /** Default database name used if not specified in constructor. */
    static readonly defaultDatabaseName: string;
    /** Collection name for transactions. */
    static readonly transactionCollectionName: string;
    /** Database name used by this transaction store. */
    readonly databaseName: string;
    private db;
    private transactionCollection;
    /**
     * Constructs a `MongoDbTransactionStore`;
     * @param retryExponentialDelayFactor
     *   The exponential delay factor in milliseconds for retries of unresolvable transactions.
     *   e.g. if it is set to 1 seconds, then the delays for retries will be 1 second, 2 seconds, 4 seconds... until the transaction can be resolved.
     */
    constructor(serverUrl: string, databaseName?: string);
    /**
     * Initialize the MongoDB transaction store.
     */
    initialize(): Promise<void>;
    /**
     * Returns the number of transactions in the store.
     * Mainly used by tests.
     */
    getTransactionsCount(): Promise<number>;
    getTransaction(transactionNumber: number): Promise<TransactionModel | undefined>;
    getTransactionsLaterThan(transactionNumber: number | undefined, max: number): Promise<TransactionModel[]>;
    /**
     * Clears the transaction store.
     */
    clearCollection(): Promise<void>;
    addTransaction(transaction: TransactionModel): Promise<void>;
    getLastTransaction(): Promise<TransactionModel | undefined>;
    getExponentiallySpacedTransactions(): Promise<TransactionModel[]>;
    removeTransactionsLaterThan(transactionNumber?: number): Promise<void>;
    /**
     * Gets the list of processed transactions.
     * Mainly used for test purposes.
     */
    getTransactions(): Promise<TransactionModel[]>;
    /**
     * Creates the `transaction` collection with indexes if it does not exists.
     * @returns The existing collection if exists, else the newly created collection.
     */
    private static createTransactionCollectionIfNotExist;
}