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Example Mint Function
Here is an example mint function on Ethereum that works well with NFTpay
function purchase(uint256 num) public payable {
uint256 supply = totalSupply();
require( num < 21, "You can purchase a maximum of 20 NFTs" );
require( supply + num < 10000 - _reserved, "Exceeds maximum NFTs supply" );
require( msg.value >= _price * num, "Ether sent is not correct" );
for(uint256 i; i < num; i++){
_safeMint( msg.sender, supply + i );
}
}