Injective Instantiate2

fn instantiate2_address_impl(
    checksum: &[u8],
    creator: &CanonicalAddr,
    salt: &[u8],
    msg: &[u8],
) -> Result<CanonicalAddr, Instantiate2AddressError> {
    if checksum.len() != 32 {
        return Err(Instantiate2AddressError::InvalidChecksumLength);
    }

    if salt.is_empty() || salt.len() > 64 {
        return Err(Instantiate2AddressError::InvalidSaltLength);
    };

    // Length-prefix each part of the key
    let mut key = Vec::<u8>::new();
    key.extend_from_slice(b"wasm\0");
    key.extend_from_slice(&(checksum.len() as u64).to_be_bytes());
    key.extend_from_slice(checksum);
    key.extend_from_slice(&(creator.len() as u64).to_be_bytes());
    key.extend_from_slice(creator);
    key.extend_from_slice(&(salt.len() as u64).to_be_bytes());
    key.extend_from_slice(salt);
    key.extend_from_slice(&(msg.len() as u64).to_be_bytes());
    key.extend_from_slice(msg);

    let address_data = hash("module", &key);
    Ok(CanonicalAddr::from(&address_data[0..20]))
}