Function isKeyHandle

Returns value is Readonly<
    {
        algorithm: CustodyAlgorithm;
        capabilities: readonly ("sign" | "verify" | "unwrap")[];
        identity: (
            context?: Readonly<{ deadline: number; signal: AbortSignal }>,
        ) => Promise<Result<KeyIdentity>>;
        publicKey: (
            context?: Readonly<{ deadline: number; signal: AbortSignal }>,
        ) => Promise<Result<PublicKey>>;
        release: () => Promise<Result<true>>;
        sign: (
            algorithm: unknown,
            data: unknown,
            context: Context,
            options?: unknown,
        ) => Promise<Result<Uint8Array<ArrayBuffer>>>;
        unwrap: (
            algorithm: unknown,
            wrappedKey: unknown,
            context: Context,
            options?: unknown,
        ) => Promise<
            Result<
                Readonly<
                    {
                        decrypt: (
                            ciphertext: unknown,
                            options: unknown,
                            context: Context,
                        ) => Promise<Result<Uint8Array<(...)>>>;
                        length: 128 | 256;
                        release: () => Promise<Result<true>>;
                    },
                >,
            >,
        >;
        verify: (
            algorithm: unknown,
            signature: unknown,
            data: unknown,
            context: Context,
            options?: unknown,
        ) => Promise<Result<true>>;
    },
>