Message content (plaintext before E2E encryption)
Sender's ed25519 public key (hex)
Unique message ID (UUID v4)
OptionalreplyOptional: reply to another message ID
Sender's ed25519 signature of the envelope (hex)
Unix timestamp (ms) when message was created by sender
Recipient's ed25519 public key (hex)
Message type discriminator
The core message envelope that gets encrypted and sent through L2PS