blockchain - 从主网（以太坊）上的其他智能合约调用部署合约的功能是否可行（就gas成本而言）？

Question

我需要在需要部署在主网上的新合约中调用我部署的 ERC20 代币的传输函数。我想知道这是否可行，或者需要大量的汽油，进而需要高额的交易费用。

Answer 1

是的，这是可行的——这是合约相互交互的方式。一般来说，我们在调用合约中使用一个接口：

pragma solidity ^0.5.0;

// Define an interface to the contract you want to call. Only need function signatures

interface YourErc20Contract {
        function transfer(address recipient, uint amount) external;
    }

contract CallingContract {
    
    address your_erc20_address = 0x.....  // called contract address here
    address recipient = 0x....  // arguments for the function call
    uint amount = 2  


    // Call the function on the other contract using the interface
    function remoteCall(address recipient, uint amount) public {
        YourErc20Contract(your_erc20_address).transfer(recipient, amount)
        }
    }