Added ERC721 Contract

Author: 123-code

Membership.sol

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity ^ 0.8.0;
+
+import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+import "@openzeppelin/contracts/access/Ownable.sol"; 
+import "@openzeppelin/contracts/utils/Counters.sol";
+
+contract Minter is ERC721,Ownable{
+    using Counters for Counters.Counter;
+    //using String for uint;
+
+Counters.Counter _ntokens;
+
+constructor() ERC721("Minter","MN"){
+
+}
+
+mapping(address=>uint)minted;
+mapping(uint=>string)SetUris;
+
+
+struct TokenRender{
+    uint id;
+    string uri;
+
+
+}
+
+
+function getalltokens()public view returns(TokenRender[] memory){
+uint latestid = _ntokens.current();
+uint counter = 0;
+TokenRender[] result = new TokenRender[](latestid);
+
+
+for(uint i=0;i<latestid;i++){
+if(_exists(counter)){
+
+string memory uri  = tokenURI(counter);
+res[counter] = TokenRender(counter,uri);
+
+}
+counter++;
+
+}
+return result;
+
+}
+
+function seturi(uint id ,string memory uri)internal{
+SetUris[id] = uri;
+}
+
+function tokenURI(uint token_id )public virtual override returns(string memory){
+string memory t_uri = SetUris[token_id];
+return t_uri;
+
+}
+
+function mint(address recipient, string memory uri ) public returns(uint){ 
+    // current state of token ids;
+
+    uint newtoken = _ntokens.current();
+    _ntokens.increment();
+_mint(recipient,newtoken);
+seturi(newtoken,uri);
+    //minted[msg.sender] +=1;
+    return newtoken;
+
+}
+
+
+}