export declare class BaseError extends Error {
    readonly cause?: unknown | undefined;
    constructor(message: string, cause?: unknown | undefined);
    toJSON(): Record<string, unknown>;
    private formatCause;
}
export declare class ValidationError extends BaseError {
    constructor(message: string, cause?: unknown);
}
export declare class NetworkError extends BaseError {
    constructor(message: string, cause?: unknown);
}
export declare class InsufficientBalanceError extends BaseError {
    constructor(message: string, cause?: unknown);
}
export declare class InsufficientAllowanceError extends BaseError {
    constructor(message: string, cause?: unknown);
}
export declare function handleError(error: unknown): BaseError;
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