export type Optional<T, K extends keyof T> = Omit<T, K> & Partial<T>;
export declare const KeyType: {
    readonly GRAPH: "GRAPH";
    readonly TEAM: "TEAM";
    readonly ROLE: "ROLE";
    readonly USER: "USER";
    readonly DEVICE: "DEVICE";
    readonly SERVER: "SERVER";
    readonly EPHEMERAL: "EPHEMERAL";
};
export type KeyType = (typeof KeyType)[keyof typeof KeyType];
export type InvalidResult = {
    isValid: false;
    error: ValidationError;
};
export type ValidResult = {
    isValid: true;
};
export declare class ValidationError extends Error {
    constructor(message: string, details?: any);
    name: 'Signature chain validation error';
    details?: any;
}
export type ValidationResult = ValidResult | InvalidResult;
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