dynamic SvgNft Support

docs/Contracts/SvgnftContract.sol

@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.8;
+
+import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
+import "base64-sol/base64.sol";
+import "hardhat/console.sol";
+
+error ERC721Metadata__URI_QueryFor_NonExistentToken();
+
+contract SvgNft is ERC721, Ownable {
+    uint256 private s_tokenCounter;
+    string private s_ImageURI;
+
+    mapping(uint256 => int256) private s_tokenIdToHighValues;
+    event CreatedNFT(uint256 indexed tokenId);
+
+    constructor(string memory Svg) ERC721("Dynamic SVG NFT", "DSN") {
+        s_tokenCounter = 0;
+        s_ImageURI = svgToImageURI(Svg);
+    }
+
+    function safeMintNFT() public {
+        _safeMint(msg.sender, s_tokenCounter);
+        s_tokenCounter = s_tokenCounter + 1;
+        emit CreatedNFT(s_tokenCounter, highValue);
+    }
+
+    // You could also just upload the raw SVG and have solildity convert it!
+    function svgToImageURI(
+        string memory svg
+    ) public pure returns (string memory) {
+        // example:
+        // '<svg width="500" height="500" viewBox="0 0 285 350" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill="black" d="M150,0,L75,200,L225,200,Z"></path></svg>'
+        // would return ""
+        string memory baseURL = "data:image/svg+xml;base64,";
+        string memory svgBase64Encoded = Base64.encode(
+            bytes(string(abi.encodePacked(svg)))
+        );
+        return string(abi.encodePacked(baseURL, svgBase64Encoded));
+    }
+
+    function _baseURI() internal pure override returns (string memory) {
+        return "data:application/json;base64,";
+    }
+
+    function tokenURI(
+        uint256 tokenId
+    ) public view virtual override returns (string memory) {
+        if (!_exists(tokenId)) {
+            revert ERC721Metadata__URI_QueryFor_NonExistentToken();
+        }
+
+        string memory imageURI = s_ImageURI;
+
+        return
+            string(
+                abi.encodePacked(
+                    _baseURI(),
+                    Base64.encode(
+                        bytes(
+                            abi.encodePacked(
+                                '{"name":"',
+                                name(), // You can add whatever name here
+                                '", "description":"An NFT that changes based on the Chainlink Feed", ',
+                                '"attributes": [{"trait_type": "coolness", "value": 100}], "image":"',
+                                imageURI,
+                                '"}'
+                            )
+                        )
+                    )
+                )
+            );
+    }
+
+    function getSVG() public view returns (string memory) {
+        return s_ImageURI;
+    }
+
+    function getTokenCounter() public view returns (uint256) {
+        return s_tokenCounter;
+    }
+}