Method lock

chapter 5/transactions.rs:75–79

(&mut self, address: &str)

    }

    fn lock(&mut self, address: &str) {
        let payload = base58_decode(address);
        let pub_key_hash = payload[1..payload.len() - wallet::ADDRESS_CHECK_SUM_LEN].to_vec();
        self.pub_key_hash = pub_key_hash;
    }

    pub fn is_locked_with_key(&self, pub_key_hash: &[u8]) -> bool {
        self.pub_key_hash.eq(pub_key_hash)