export declare function isObject(value: unknown): value is Record<string, unknown>;
export declare function getCauseFromUnknown(cause: unknown): Error | undefined;
export declare const isCoseError: (cause: unknown) => cause is CoseError;
export declare function getCoseErrorFromUnknown(cause: unknown): CoseError;
export type COSE_ERROR_CODE = 'INTERNAL_SERVER_ERROR' | 'COSE_UNSUPPORTED_MAC' | 'COSE_ALG_NOT_ALLOWED' | 'COSE_INVALID_SIGNATURE' | 'COSE_INVALID_ALG' | 'COSE_UNSUPPORTED_ALG';
export declare class CoseError extends Error {
    readonly cause?: Error;
    readonly code: COSE_ERROR_CODE;
    constructor(opts: {
        message?: string;
        code: COSE_ERROR_CODE;
        cause?: unknown;
    });
}
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