/**
 * In-memory key store implementation.
 */
import type { KeyPair, KeyStore } from "../core/types.js";
/**
 * In-memory key store.
 *
 * Keys are stored in memory and lost when the process exits.
 * Useful for testing, development, and temporary key storage.
 *
 * @example
 * ```typescript
 * // Empty keystore
 * const keyStore = new InMemoryKeyStore()
 *
 * // Pre-populate with keys
 * const keyStore = new InMemoryKeyStore({
 *   "alice.near": "ed25519:...",
 *   "bob.near": "ed25519:..."
 * })
 * ```
 */
export declare class InMemoryKeyStore implements KeyStore {
    private keys;
    /**
     * Create a new in-memory keystore.
     *
     * @param initialKeys - Optional initial keys to populate the store
     *
     * @example
     * ```typescript
     * const keyStore = new InMemoryKeyStore({
     *   "test.near": "ed25519:3D4c2v8K5x..."
     * })
     * ```
     */
    constructor(initialKeys?: Record<string, string>);
    /**
     * Add a key to the keystore
     *
     * @param accountId - NEAR account ID
     * @param key - Key pair to store
     */
    add(accountId: string, key: KeyPair): Promise<void>;
    /**
     * Get a key from the keystore
     *
     * @param accountId - NEAR account ID
     * @returns Key pair if found, null otherwise
     */
    get(accountId: string): Promise<KeyPair | null>;
    /**
     * Remove a key from the keystore
     *
     * @param accountId - NEAR account ID
     */
    remove(accountId: string): Promise<void>;
    /**
     * List all account IDs in the keystore
     *
     * @returns Array of account IDs
     */
    list(): Promise<string[]>;
    /**
     * Clear all keys from the keystore
     *
     * Useful for testing cleanup.
     */
    clear(): void;
}
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