废话不多说 直接上代码
注意点 必须是public的可以让其他合约进行访问 并且做好权限控制
// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
contract heroCardData{
uint256 public limit = 100;
string public users = "qwertyuiop";
mapping (address=>address) public userList;
function getUsers() public view returns (string memory name){
return users;
}
function setLimit(uint256 _limit) public {
limit = _limit;
}
function changeValue(uint256 orderId) public pure returns (uint256) {
return ++orderId;
}
}
在使用合约中写入 注意点方法名要一致
interface IA {
function limit() external view returns (uint256);
function getUsers() external view returns (string memory);
function changeValue(uint256 orderId) external pure returns (uint256);
}
在正式使用合约中 传入部署的heroCardData合约地址
contract myTest{
IA datesss;
constructor(address dataAddress){
datesss = IA(dataAddress);
}
function getLimit() public view returns (uint256) {
return datesss.limit();
}
function getUserList() public view returns (string memory) {
return datesss.getUsers();
}
function changes(uint256 orders) public view returns (uint256) {
return datesss.changeValue(orders);
}
}
