Untron from Contracts

Here's an example of how to interact with Untron Core from a Solidity smart contract deployed on ZKsync Era. In this example, we're creating a wrapper contract that allows its owner to manage orders on Untron, while keeping all collateral in the contract.

Warning: This code was not audited and must not be used in production.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
 
import {IUntronCore, Transfer} from "@ultrasoundlabs/untron/contracts/src/interfaces/IUntronCore.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 
contract UntronWrapper is Ownable {
    IUntronCore public untron;
    IERC20 public usdt;
 
    constructor(address _untron, address _usdt) Ownable(msg.sender) {
        untron = IUntronCore(_untron);
        usdt = IERC20(_usdt);
    }
 
    function createOrder(address provider, address receiver, uint256 size, uint256 rate, Transfer calldata transfer)
        external onlyOwner {
        uint256 collateral = untron.requiredCollateral();
        require(usdt.balanceOf(address(this)) >= collateral, "Insufficient USDT balance");
 
        usdt.approve(address(untron), collateral);
        untron.createOrder(provider, receiver, size, rate, transfer);
    }
 
    function changeOrder(bytes32 orderId, Transfer calldata transfer) external onlyOwner {
        untron.changeOrder(orderId, transfer);
    }
 
    function stopOrder(bytes32 orderId) external onlyOwner {
        untron.stopOrder(orderId);
    }
 
    function withdrawCollateral() external {
        usdt.transfer(owner(), usdt.balanceOf(address(this)));
    }
}

General Information Untron from Software