Macro tx 

macro_rules! tx {
    (tx_id) => { ... };
    (sender) => { ... };
    (sender_public_key) => { ... };
}

Get tx fields

Usage

use we_cdk::*;

#[action]
fn _constructor() {
    let tx_id: Binary = tx!(tx_id);
    let tx_sender: Binary = tx!(sender);
    let tx_sender_public_key: Binary = tx!(sender_public_key);
}