合约创建者的 Solidity NFT 铸造费？

Question

I am currently trying to program an ERC721 smart contract in Solidity, allowing users to mint from it. But with every mint, I want the user to pay a fee to a specified wallet. How can I achieve this? Any help ist greatly appreciated, thanks in advance!

Answer 1

First you declare de variable as an address payable where you will store the address that will recieve the fees payments, then in the constructor you receive the address as a param and store it in the variable you previously defined then

You have to make the mint function payable, then inside of the mint function a require like this require(msg.value == mintfee, "some error message in case the ether is not the especified amount"); or if you want to put a minimun and not an exact amount require(msg.value >= mintfee, "some error message in case the ether is not the especified amount"); , now you can pay the fees like this

(bool result,) = variableWhereYouStoreTheAddress.call{value:msg.value}("");
revert(result,"the fees payment has failed");