Pumpkin-MC/Pumpkin · error · ChatError

has an expired public key

Error message

has an expired public key

What it means

ChatError sentinel for the secure-chat key lifecycle: the player's public key attached to the login/chat session has expired, so signatures can no longer be trusted. Fires when the client keeps chatting with a key whose expiry timestamp is in the past (server clocks drifting or a stale client session). The expired key is delivered by the client in its profile/signature data.

Solutions

1. Kick the player so a fresh key is negotiated
2. Check key expiry (allowed from timestamp) before accepting signatures
3. Log the expiry event

When it happens

Trigger: Thrown at crates/pumpkin/src/net/java/play/mod.rs:138 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Pumpkin-MC/Pumpkin@8d4639e25a (2026-09-09). Data as JSON: /api/errors/109b91f6d3edfa99. Report an issue: GitHub.

Appendix: source

Thrown at crates/pumpkin/src/net/java/play/mod.rs:138

        }
    }
}

#[derive(Debug, Error)]
pub enum ChatError {
    #[error("sent an oversized message")]
    OversizedMessage,
    #[error("sent a message with illegal characters")]
    IllegalCharacters,
    #[error("sent a chat with invalid/no signature")]
    UnsignedChat,
    #[error("has too many unacknowledged chats queued")]
    TooManyPendingChats,
    #[error("sent a chat that couldn't be validated")]
    ChatValidationFailed,
    #[error("sent a chat with an out of order timestamp")]
    OutOfOrderChat,
    #[error("has an expired public key")]
    ExpiredPublicKey,
    #[error("attempted to initialize a session with an invalid public key")]
    InvalidPublicKey,
}

impl PumpkinError for ChatError {
    fn is_kick(&self) -> bool {
        true
    }

    fn severity(&self) -> Level {
        Level::WARN
    }

    fn client_kick_reason(&self) -> Option<String> {
        match self {
            Self::OversizedMessage => Some("Chat message too long".into()),
            Self::IllegalCharacters => Some(

View on GitHub (pinned to 8d4639e25a)