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use alloc::vec::Vec;
use core::fmt;
use core::fmt::Formatter;

/// Formatting utility to truncate a vector of bytes to a hex string of max length `N`
pub fn fmt_truncated_hex<const N: usize>(data: &Vec<u8>, f: &mut Formatter) -> fmt::Result {
    let formatted = if data.len() > N {
        let mut s = hex::encode(&data[0..N - 3]);
        s.push_str("...");
        s
    } else {
        hex::encode(data)
    };
    f.write_str(formatted.as_str())
}