Smart Contracts

Write (Rust) ──► Compile (WASM) ──► Deploy ──► Execute

use nexus_sdk::{
    solidity::{*, SafeMath},
    contract_api::ez::ret,
    require,
};
use nexus_sdk::solidity::uint256 as U256;

// State variables using Solidity-compatible Mappings
static VALUE: Mapping<&[u8], U256> = Mapping::new(b"value");
static OWNER: Mapping<&[u8], Address> = Mapping::new(b"owner");

nexus_fn! {
    fn init() {
        let sender = Blockchain::msg.sender();
        OWNER.set(&b"val".as_slice(), sender);
        VALUE.set(&b"val".as_slice(), U256::from(0));
        ret::u32(1)
    }
}

nexus_fn! {
    fn my_function() {
        let current = VALUE.get(&b"val".as_slice());
        let mut out = [0u8; 32];
        current.to_little_endian(&mut out);
        ret::u256(&out)
    }
}

storage::set(b"key", b"value");
let value = storage::get(b"key");

events::emit("Transfer", &data);

let result = xcc::call(&contract_id, "function", &args);

let height = bitcoin::height();
let hash = bitcoin::hash_at(100);

cargo build --target wasm32-unknown-unknown --release