Function encode_lower_into 

pub fn encode_lower_into(
    input: &[u8],
    out: &mut [u8],
) -> Result<usize, HexOutputOverflow>

Emit input as lowercase ASCII hex into out. Returns the number of bytes written — always 2 × input.len() on success.

Errors

• HexOutputOverflow — out.len() < 2 * input.len().