Source Code

Use the following command to create an initial project.

rust-contract init helloworld

Replace helloworld/lib.rs with the following source code:

#![allow(unused)]
#![cfg_attr(not(feature = "std"), no_std)]

fn main() {
#[eosio_chain::contract]
mod hello {
    use eosio_chain::{
        Name,
        eosio_println,
    };

    #[chain(main)]
    #[allow(dead_code)]
    pub struct Hello {
        receiver: Name,
        first_receiver: Name,
        action: Name,
    }

    impl Hello {

        pub fn new(receiver: Name, first_receiver: Name, action: Name) -> Self {
            Self {
                receiver: receiver,
                first_receiver: first_receiver,
                action: action,
            }
        }

        #[chain(action="sayhello")]
        pub fn say_hello(&self, name: String) {
            eosio_println!("++++hello", name);
        }
    }
}
}