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MerkleTreeWhitelist.sol
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MerkleTreeWhitelist.sol
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract MerkleTreeWhitelist is ERC721, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenSupply;
Counters.Counter private _nextTokenId;
uint256 public mintPrice = 0.08 ether;
uint256 public presalePrice = 0.1 ether;
uint256 private reserveAtATime = 37;
uint256 private reservedCount = 0;
uint256 private maxReserveCount = 37;
bytes32 public merkleRoot = YOUR_ROOT_HASH;
string _baseTokenURI;
bool public isActive = false;
bool public isPresaleActive = false;
uint256 public MAX_SUPPLY = 5000;
uint256 public maximumAllowedTokensPerPurchase = 5;
uint256 public maximumAllowedTokensPerWallet = 7;
uint256 public allowListMaxMint = 2;
// Whitelisted
mapping(address => bool) public whitelistClaimed;
event SaleActivation(bool isActive);
constructor(string memory baseURI) ERC721("Merkle Tree Whitelist", "MTW") {
setBaseURI(baseURI);
}
modifier saleIsOpen {
require(_tokenSupply.current() <= MAX_SUPPLY, "Sale has ended.");
_;
}
modifier onlyAuthorized() {
require(owner() == msg.sender);
_;
}
function tokensMinted() public view returns (uint256) {
return _tokenSupply.current();
}
function setMaximumAllowedTokens(uint256 _count) public onlyAuthorized {
maximumAllowedTokensPerPurchase = _count;
}
function setMaximumAllowedTokensPerWallet(uint256 _count) public onlyAuthorized {
maximumAllowedTokensPerWallet = _count;
}
function setActive(bool val) public onlyAuthorized {
isActive = val;
emit SaleActivation(val);
}
function setSyncAddress(bytes32 _root) public onlyOwner {
merkleRoot = _root;
}
function setMaxMintSupply(uint256 maxMintSupply) external onlyAuthorized {
MAX_SUPPLY = maxMintSupply;
}
function setIsPresaleActive(bool _isPresaleActive) external onlyAuthorized {
isPresaleActive = _isPresaleActive;
}
function setAllowListMaxMint(uint256 maxMint) external onlyAuthorized {
allowListMaxMint = maxMint;
}
function setReserveAtATime(uint256 val) public onlyAuthorized {
reserveAtATime = val;
}
function setMaxReserve(uint256 val) public onlyAuthorized {
maxReserveCount = val;
}
function setPrice(uint256 _price) public onlyAuthorized {
mintPrice = _price;
}
function setPresalePrice(uint256 _preslaePrice) public onlyAuthorized {
presalePrice = _preslaePrice;
}
function setBaseURI(string memory baseURI) public onlyAuthorized {
_baseTokenURI = baseURI;
}
function getReserveAtATime() external view returns (uint256) {
return reserveAtATime;
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function reserveNft() public onlyAuthorized {
require(reservedCount <= maxReserveCount, "Max Reserves taken already!");
uint256 i;
for (i = 0; i < reserveAtATime; i++) {
_tokenSupply.increment();
_safeMint(msg.sender, _tokenSupply.current());
reservedCount++;
}
}
function verifyUser (bytes32[] calldata _merkleProof) public view returns (uint256) {
// 406 means Not Acceptable
uint256 verificationStatus = 406;
// Generate leaf node from callee
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
if(MerkleProof.verify(_merkleProof, merkleRoot, leaf)) {
// 200 means successfull verification
verificationStatus = 200;
}
return verificationStatus;
}
function reserveToCustomWallet(address _walletAddress, uint256 _count) public onlyAuthorized {
for (uint256 i = 0; i < _count; i++) {
_tokenSupply.increment();
_safeMint(_walletAddress, _tokenSupply.current());
}
}
function preSaleMint(bytes32[] calldata _merkleProof, uint256 _count) public payable saleIsOpen {
uint256 mintIndex = _tokenSupply.current();
require(isPresaleActive, "Presale is not active");
// Make sure user has not already claimed the tokens
require(!whitelistClaimed[msg.sender], "Address already claimed");
// Generate leaf node from callee
bytes32 leaf = keccak256(abi.encode(msg.sender));
// Check the proof
require(MerkleProof.verify(_merkleProof, merkleRoot, leaf), "Invalid Merkle Proof");
whitelistClaimed[msg.sender] = true;
require(mintIndex < MAX_SUPPLY, 'All tokens have been minted');
require(balanceOf(msg.sender) + _count <= allowListMaxMint, 'Cannot purchase this many tokens');
require(msg.value >= presalePrice * _count, 'Insuffient ETH amount sent.');
for (uint256 i = 0; i < _count; i++) {
_tokenSupply.increment();
_safeMint(msg.sender, _tokenSupply.current());
}
}
function withdraw() external onlyAuthorized {
uint balance = address(this).balance;
payable(owner()).transfer(balance);
}
}