Function new_contract 

pub fn new_contract(
    entry_points: EntryPoints,
    named_keys: Option<NamedKeys>,
    hash_name: Option<String>,
    uref_name: Option<String>,
    message_topics: Option<BTreeMap<String, MessageTopicOperation>>,
) -> (ContractHash, EntityVersion)

Create a new contract stored under a Key::Hash at version 1. You may upgrade this contract in the future; if you want a contract that is locked (i.e. cannot be upgraded) call new_locked_contract instead. if named_keys is provided, puts all of the included named keys into the newly created contract version’s named keys. if hash_name is provided, puts Key::Hash(contract_package_hash) into the installing account’s named keys under hash_name. if uref_name is provided, puts Key::URef(access_uref) into the installing account’s named keys under uref_name