Add Create an NFT Collection using LSP8 tutorial

docs/learn/smart-contract-developers/create-nft-collection.md

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+---
+sidebar_label: '🗃 Create an NFT Collection'
+sidebar_position: 4
+---
+
+# Create an NFT Collection Using LSP8
+
+This tutorial goes over creating a collection of collectibles, where each item is unique and has its own design.
+
+:::info
+⌨️ The full code of this example can be found in 👾 [here](https://github.com/CJ42/LUKSO-Hardhat-template).
+:::
+
+## Setup
+
+Make sure you have the following dependencies installed:
+
+- [`ethers.js`](https://github.com/ethers-io/ethers.js/) (alternatively you can use [`web3.js`](https://github.com/web3/web3.js))
+- [`@lukso/lsp-smart-contracts`](https://github.com/lukso-network/lsp-smart-contracts/)
+
+## Create the Smart Contracts
+
+When creating digital asset smart contracts on LUKSO, you will need to specify the token type and the following data keys in the ERC725Y storage. There are three types that you can define:
+
+- 0 = Token
+- 1 = NFT
+- 2 = Collection
+
+```solidity title="contracts/TokenTypes.sol"
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.4;
+
+bytes32 constant _LSP4_TOKEN_TYPE_DATA_KEY = 0xe0261fa95db2eb3b5439bd033cda66d56b96f92f243a8228fd87550ed7bdfdb3;
+
+enum TokenType {
+    TOKEN,
+    NFT,
+    COLLECTION
+}
+
+
+```
+
+You will also create a custom [LSP8 Identfiable Digital Asset Collection](../../standards/tokens/LSP8-Identifiable-Digital-Asset.md) that extends [LSP8Mintable](../../contracts/contracts/LSP8IdentifiableDigitalAsset/presets/LSP8Mintable.md).
+
+```solidity title="contracts/MyNFTCollection.sol"
+
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.4;
+
+// modules
+import {
+    LSP8Mintable
+} from "@lukso/lsp-smart-contracts/contracts/LSP8IdentifiableDigitalAsset/presets/LSP8Mintable.sol";
+
+// constants
+import {
+    _LSP8_TOKENID_TYPE_NUMBER
+} from "@lukso/lsp-smart-contracts/contracts/LSP8IdentifiableDigitalAsset/LSP8Constants.sol";
+import {_LSP4_TOKEN_TYPE_DATA_KEY, TokenType} from "../TokenTypes.sol";
+
+contract BasicNFTCollection is LSP8Mintable {
+    constructor(
+        string memory nftCollectionName,
+        string memory nftCollectionSymbol,
+        address contractOwner
+    )
+        LSP8Mintable(
+            nftCollectionName,        // NFT collection name
+            nftCollectionSymbol,      // NFT collection symbol
+            contractOwner,            // owner of the NFT contract (the address that controls it, sets metadata, can transfer the ownership of the contract)
+            _LSP8_TOKENID_TYPE_NUMBER // type of NFT/ tokenIds
+        )
+    {
+        // set token type
+        _setData(_LSP4_TOKEN_TYPE_DATA_KEY, abi.encode(TokenType.COLLECTION));
+    }
+}
+```
+
+## Deploy our NFT Collection Contract on the LUKSO Testnet
+
+```js
+import { ethers } from "hardhat";
+
+import {BasicNFTCollection, BasicNFTCollection__factory} from "../typechain-types";
+
+async function deployLSP8Collection() {
+  const accounts = await ethers.getSigners();
+  const deployer = accounts[0];
+
+  const nftCollection: BasicNFTCollection = await new BasicNFTCollection__factory(deployer).deploy(
+    "NFT Collection Name", // collection name
+    "NFT",                 // collection symbol
+    deployer.address
+  );
+
+}
+
+deployLSP8Collection().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});
+
+
+```
+
+## Congratulations 🥳
+
+You have deployed your first LSP8 NFT Collection on the LUKSO Testnet.
+
+## References
+
+- [BuildUP #2 | Create an NFT Collection using LSP7 or LSP8 (YouTube)](https://www.youtube.com/watch?v=DMpeMswK12w)