Merge pull request #33 from RohitSingh107/main

Completed issue #12 text based nft

Ethereum/TextBasedNFT/README.md

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+# NFT-ERC721
+
+## Description
+
+It is a simple ERC721 token.
+It have a common TokenURI for all minted tokens.
+It uses text based svg as token image.
+Name of token is SSOC and it's symbol is SOC.
+
+## How this is build
+
+I have build this smart contract using the [Foundry](https://github.com/foundry-rs/foundry) and the library openzeppelin contracts.
+
+## Tech Stack Used
+
+I have used following tech stacks:-
+
+- Solidity
+- Foundry
+- Remix
+- OpenZeppelin
+
+## Steps to Run
+
+To run it, we just have to copy the smart contract into [Remix ide](https://remix.ethereum.org/), remix automatically compiles the contract. Then we to just deploy, smart contract's constructor doesn't take any arguments. After deployment we can mint nft using mintNft function. That's all.
+
+## Output Screenshots
+
+![Functions of Contract](./images/functions.png)
+
+![Minting Token](./images/mintNft.png)
+
+![URI of Token](./images/tokenURI.png)

Ethereum/TextBasedNFT/SSOC.sol

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+// SPDX-License-Identifier: GPL3
+
+pragma solidity ^0.8.7;
+import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+
+contract SSOC is ERC721 {
+    uint256 private s_tokenIdCounter;
+
+    // Event to be emitted when nft minted
+    event CreatedNFT(uint256 indexed tokenId);
+
+    // ERC721 is like the super class which we inherit to use all its properties and methods
+    constructor() ERC721("SSOC", "SOC") {
+        s_tokenIdCounter = 0;
+    }
+
+    function mintNft() public {
+        // Mint a new token with s_tokenIdCounter as id
+        _safeMint(msg.sender, s_tokenIdCounter);
+
+        // Increment the counter
+        s_tokenIdCounter = s_tokenIdCounter + 1;
+
+        // Emitting the event of event creation with tokenId
+        emit CreatedNFT(s_tokenIdCounter);
+    }
+
+    function _baseURI() internal pure override returns (string memory) {
+        // Common URI for all token Ids
+        return
+            "data:application/json;base64,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";
+    }
+
+    // URI of token includes text svg as image
+    function tokenURI(
+        uint256 /* tokenId */
+    ) public pure override returns (string memory) {
+        string memory TOKEN_URI = _baseURI();
+        return TOKEN_URI;
+    }
+
+    // total number of tokens minted
+    function getTokenCounter() public view returns (uint256) {
+        return s_tokenIdCounter;
+    }
+}