use std::fmt;

const MAX_PEER_ID_LENGTH: usize = 20;

#[derive(Debug)]
pub struct PeerId {
    pub bytes: [u8; MAX_PEER_ID_LENGTH],
}

impl PeerId {
    pub fn from_bytes(buf: &[u8]) -> Option<PeerId> {
        Some(PeerId {
            bytes: buf.try_into().ok()?,
        })
    }

    pub fn to_string_lossy(&self) -> String {
        String::from_utf8_lossy(&self.bytes).into()
    }
}

impl fmt::Display for PeerId {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.to_string_lossy())
    }
}