export type X25519EncryptedPayload = {
    ciphertext: string;
    nonce: string;
    ephemPublicKey: string;
    publicKey: string;
};
export type AESEncryptedPayload = {
    ciphertext: ArrayBufferLike | ReadableStream;
    iv?: ArrayBufferLike;
};
export type EncryptedPayload = {
    encryptedData: AESEncryptedPayload;
    encryptedKey: X25519EncryptedPayload;
};
export type EncryptOptions = {
    encode?: boolean;
    encryptedKey?: string;
    prefixCiphertextWithIv?: boolean;
};
export type EncryptionMetadata = {
    encryptedKey?: string;
    iv?: string;
};
export type EncryptedUserBackupPayload = {
    encryptedPayload: string | AESEncryptedPayload;
    salt: string;
    iterationCount?: number;
};