export declare enum McpErrorCode {
    UNKNOWN = 1000,
    INTERNAL = 1001,
    INVALID_PARAMS = 1002,
    NOT_FOUND = 1003,
    TIMEOUT = 1004,
    CHAIN_NOT_INITIALIZED = 2000,
    CHAIN_NOT_FOUND = 2001,
    CHAIN_NOT_READY = 2002,
    CHAIN_WRITE_DISABLED = 2003,
    CHAIN_CONNECTION_FAILED = 2004,
    AGENT_NOT_FOUND = 3000,
    AGENT_INVALID_ID = 3001,
    AGENT_PARSE_ERROR = 3002,
    FEEDBACK_NOT_FOUND = 4000,
    FEEDBACK_INVALID_SCORE = 4001,
    FEEDBACK_SUBMIT_FAILED = 4002,
    CACHE_INIT_FAILED = 5000,
    CACHE_QUERY_FAILED = 5001,
    CACHE_SYNC_FAILED = 5002,
    INDEXER_NOT_AVAILABLE = 6000,
    INDEXER_QUERY_FAILED = 6001,
    CONFIG_INVALID = 7000,
    CONFIG_MISSING_REQUIRED = 7001,
    WALLET_ERROR = 8000,
    WALLET_NOT_FOUND = 8001,
    WALLET_LOCKED = 8002,
    WALLET_INVALID_PASSWORD = 8003
}
export declare class McpError extends Error {
    readonly code: McpErrorCode;
    readonly details?: Record<string, unknown>;
    constructor(code: McpErrorCode, message: string, details?: Record<string, unknown>);
    toJSON(): Record<string, unknown>;
    static isNotFound(error: unknown): boolean;
}
export declare function notFoundError(resource: string, id: string): McpError;
export declare function invalidParamsError(message: string, params?: Record<string, unknown>): McpError;
export declare function chainNotReadyError(chainId: string): McpError;
export declare function chainNotFoundError(chainId: string): McpError;
export declare function agentNotFoundError(agentId: string): McpError;
export declare function indexerNotAvailableError(chainId: string): McpError;
export declare function walletError(message: string, details?: Record<string, unknown>): McpError;
/**
 * Sanitize error messages to prevent sensitive data leakage
 * Removes potential private keys, tokens, and other sensitive patterns
 */
export declare function sanitizeErrorMessage(message: string): string;
/**
 * Wrap a handler function with error handling
 * Converts unexpected errors to McpError with sanitized message
 */
export declare function wrapHandler<T>(handler: (args: unknown) => Promise<T>, context: string): (args: unknown) => Promise<T>;
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