export declare enum WebToPayErrorCode {
    E_MISSING = 1,
    E_MAXLEN = 2,
    E_REGEXP = 3,
    E_INVALID = 4
}
export declare class WebToPayError extends Error {
    code?: WebToPayErrorCode | undefined;
    constructor(message: string, code?: WebToPayErrorCode | undefined);
}
export declare class WebToPayValidationError extends WebToPayError {
    field?: string | undefined;
    constructor(message: string, code: WebToPayErrorCode, field?: string | undefined);
}
export declare class WebToPayCallbackError extends WebToPayError {
    constructor(message: string, code?: WebToPayErrorCode);
}
export declare class WebToPayConfigError extends WebToPayError {
    constructor(message: string);
}
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