我浏览了IERC-20界面,一切都非常清晰,(向写评论的人致敬),但是在“允许”和"transferFrom“函数中,我不明白这两个函数。
有人能帮我解释一下吗?
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transfer
我正在使用I 721从openZeppelin接口传输。当我试图将NFT从msg.sender(me)转移到契约(address.(此))时,我会得到一个Fail with error 'ERC721: transfer caller is not owner nor approved'错误。我试图列出一个NFT到我的市场,而不必做多个事务。我遗漏了什么?
contract Market is OwnableUpgradeable, ReentrancyGuardUpgradeable {
function _createListing(
address nftAdd
我正在运行最新版本的Kali Linux。
我试过这个命令:
apt-get install fglrx-atieventsd fglrx-driver fglrx-control fglrx-modules-dkms -y
我明白了:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an imposs
考虑两个类
class A{
public:
int i;
A(){}
explicit A(const int ii):i(ii){}
virtual ~A(){
cout<<"~A - "<< i <<endl;
}
virtual void inc(){
i++;
cout<<"i: "<<i<<endl;
}
};
class B: public A{
public:
i
我可以使用html表单和附加脚本(PHP + Rest )创建一个新的Marketo领导。大多数情况下,线索会出现在Marketo。
问题是,我的市场设置要求新的线索被添加到一个特殊的“聪明的运动”。
在Marketo的Rest 上,我找到了一个端点,用于将引线添加到列表,而不是添加到活动中。你遇到这个问题了吗?
class UpsertLeads{
//these are the CIN Marketo credentials
public $host = "####";//CHANGE ME
public $clientId = "####&