/**
 * Custom error classes for better type safety and error handling
 */
/**
 * Error thrown when an API request fails
 */
export declare class ApiError extends Error {
    readonly statusCode?: number;
    readonly isRetryable: boolean;
    constructor(message: string, statusCode?: number, isRetryable?: boolean);
}
/**
 * Error thrown when a network request fails
 */
export declare class NetworkError extends Error {
    readonly isRetryable: boolean;
    constructor(message: string, isRetryable?: boolean);
}
/**
 * Error thrown when transaction submission fails
 */
export declare class TransactionError extends Error {
    readonly transactionHash?: string;
    readonly reason?: string;
    constructor(message: string, transactionHash?: string, reason?: string);
}
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