Struct ParsedFrame 

pub struct ParsedFrame {
    pub plaintext_len: u32,
    pub salt: [u8; 16],
    pub nonce: [u8; 12],
    pub ciphertext: Vec<u8>,
}

Parsed payload frame.

Contains all fields needed to decrypt the embedded message: the original plaintext length, the Argon2 salt and AES-GCM-SIV nonce for key derivation/decryption, and the ciphertext (including auth tag).

Fields

plaintext_len: u32

Original plaintext length in bytes (before encryption). v1 frames store this as u16; v2 frames as u32.

salt: [u8; 16]

Argon2 salt for Tier-2 encryption key derivation.

nonce: [u8; 12]

AES-GCM-SIV nonce.

ciphertext: Vec<u8>

Ciphertext including 16-byte authentication tag.