Interface PSKEnvelope

interface PSKEnvelope {
    ciphertext: Uint8Array;
    encryptedSenderKey: Uint8Array;
    ephemeralPublicKey: Uint8Array;
    nonce: Uint8Array;
    protocolId: number;
    ratchetCounter: number;
    senderPublicKey: Uint8Array;
    version: number;
}