import { type HeliusClient } from 'helius-sdk';
export declare function setSessionSecretKey(key: Uint8Array): void;
export declare function getSessionSecretKey(): Uint8Array | null;
export declare function setSessionWalletAddress(address: string): void;
export declare function getSessionWalletAddress(): string | null;
export declare function setApiKey(apiKey: string): void;
export declare function getApiKey(): string;
export declare function hasApiKey(): boolean;
export declare function getHeliusClient(): HeliusClient;
export declare function setNetwork(network: 'mainnet-beta' | 'devnet'): void;
export declare function getNetwork(): 'mainnet-beta' | 'devnet';
export declare function getEnhancedWebSocketUrl(): string;
export declare function getLaserstreamUrl(region?: 'ewr' | 'pitt' | 'slc' | 'lax' | 'lon' | 'ams' | 'fra' | 'tyo' | 'sgp'): string;
/**
 * Load the signer keypair from session or disk.
 * Returns the raw secret key bytes and the wallet address string.
 * Throws with message 'NO_KEYPAIR' if no keypair is available.
 */
export declare function loadSignerOrFail(): Promise<{
    secretKey: Uint8Array;
    walletAddress: string;
}>;
export declare function restRequest(endpoint: string, options?: RequestInit): Promise<any>;