/**
 * Manages nonces for concurrent transactions.
 *
 * Prevents nonce collisions when sending multiple transactions in parallel
 * by caching nonces in memory and incrementing them locally.
 *
 * @internal Used by {@link TransactionBuilder}; not typically needed directly.
 */
export declare class NonceManager {
    private nonces;
    private fetching;
    /**
     * Get the next nonce for an account and public key
     *
     * Fetches from blockchain on first call, then increments locally.
     * Handles concurrent calls gracefully by deduplicating fetches.
     *
     * @param accountId - Account ID to get nonce for
     * @param publicKey - Public key to get nonce for
     * @param fetchFromBlockchain - Callback to fetch current nonce from blockchain
     * @returns Next nonce to use for transaction
     */
    getNextNonce(accountId: string, publicKey: string, fetchFromBlockchain: () => Promise<bigint>): Promise<bigint>;
    /**
     * Invalidate cached nonce for an account and public key
     *
     * Call this when an InvalidNonceError occurs to force a fresh fetch
     * from the blockchain on the next transaction.
     *
     * @param accountId - Account ID to invalidate
     * @param publicKey - Public key to invalidate
     */
    invalidate(accountId: string, publicKey: string): void;
    /**
     * Update the cached nonce to a known value and return the next nonce to use.
     *
     * Use this when you receive an InvalidNonce error with `akNonce` -
     * instead of invalidating and refetching, directly set the nonce
     * to avoid thundering herd on retry.
     *
     * @param accountId - Account ID
     * @param publicKey - Public key string (e.g., "ed25519:...")
     * @param currentNonce - The current nonce on chain (akNonce from error)
     * @returns The next nonce to use (currentNonce + 1, or higher if cache is ahead)
     */
    updateAndGetNext(accountId: string, publicKey: string, currentNonce: bigint): bigint;
    /**
     * Clear all cached nonces
     */
    clear(): void;
}
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