HiddenContentSigner: {
    nip04?: {
        decrypt: ((pubkey: string, ciphertext: string) => Promise<string> | string);
        encrypt: ((pubkey: string, plaintext: string) => Promise<string> | string);
    };
    nip44?: {
        decrypt: ((pubkey: string, ciphertext: string) => Promise<string> | string);
        encrypt: ((pubkey: string, plaintext: string) => Promise<string> | string);
    };
}