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// SPDX-License-Identifier: MIT
// contract written by @ppape_io
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
contract PPAPECollection is ERC721Enumerable, Ownable {
  using Strings for uint256;
  string public baseURI;
  string public craftBaseURI;
  string public constant UNREVEALED_TOKEN_URI = string(abi.encodePacked("https://nft.ppape.io/ag/unrevealed.json"));
  // PROVENANCE: Use the same hash mechanism as BAYC's.
  string public constant MINT_PROVENANCE = "e2d443f6dd8fff4ba1d69c3474e83beb8bc0d0e639cbe30c329ac94dd8f74fee";
  string public constant CRAFT_PROVENANCE = "ecd862bb217af0ea3870bdfb0c81567fb1daca9b60018e685e1c22aab3146bb5";
  uint256 public constant MAX_SUPPLY = 10000;
  uint256 public constant MINT_PER_WHITELIST_ADDRESS_LIMIT = 1;
  uint256 public constant MINT_PER_WAITING_LIST_ADDRESS_LIMIT = 1;
  // allSettings: 
  //        isRevealed | whitelistAcitve | waitinglistActive | mintActive | craftActive | tbd | tbd | tbd
  //           0              0                  0                0            0          0     0     0
  // mask:     0x80           0x40               0x20             0x10         0x08       0x04  0x02  0x01
  bytes1 public allSettings = 0x00;
  bytes32 public whitelistMerkleRoot;
  bytes32 public waitingListMerkleRoot;
  // schedule: whitelist -> waiting list -> mint -> craft
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