Introduction

A first contract

Shop.tsol

pragma tvm-solidity >= 0.72.0;

contract Oracle {
    mapping(uint32 => coins) public prices;

    function getPrice(uint32 asset) public responsible returns (coins) {
        return prices[asset];
    }
}

contract Shop {
    coins public lastPrice;

    function quote(address oracle, uint32 asset) public {
        Oracle(oracle).getPrice{callback: Shop.onPrice}(asset);
    }

    function onPrice(coins price) public {
        lastPrice = price;
    }
}

Get the node source

git clone https://github.com/open-ever/ever-node.git