Contract 0xA264D68dbb11CAA1eC4797bcc419cEc0A1e6B679 2

 
 
Txn Hash
Method
Block
From
To
Value
0xc73c99e3cf908f844ec0c35219293c35223bcfcc135f82de8089fa19c78532c1Safe Transfer Fr...156135612022-09-25 23:06:233 days 35 mins ago0x290b517360c5720f75f80c77c4e95214e58a26f1 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00038518 7.14582318
0xd9a244457623ac528895e1fe5cafbc7cb2fd576a4653dde78cdfd987038e18d0Safe Transfer Fr...156135102022-09-25 22:56:113 days 45 mins ago0x290b517360c5720f75f80c77c4e95214e58a26f1 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00042301 5.95766845
0xb6f1ad340adc72e15b49d98e95a68c6f53a2a2c7cd8de50428780489f313e812Set Approval For...154914722022-09-07 16:58:4921 days 6 hrs ago0x290b517360c5720f75f80c77c4e95214e58a26f1 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00168342 36.09240921
0x55c366f19016dc8ec8580c4a5e9bb8e695fbf164daea48caf9e0b8ddf0ba55c4Set Approval For...154792062022-09-05 17:48:0023 days 5 hrs ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00048537 10.40643184
0x3cee7786798dbafc1ee03c14ef3eb8b3bf4e7cc09bc836bdbf8995bb513ff83aSafe Transfer Fr...154788552022-09-05 16:27:2223 days 7 hrs ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00230472 16.80036478
0x7868ef86c27bba7a9c3474dcaf27168ec9044005d9e9c426d90eaab52a0b2bdaPublic Mint154631862022-09-03 4:07:3025 days 19 hrs ago0x9fea0267f6d73ebc8941ba159df96237221b508c IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.12 Ether0.00105006 9.38235764
0x7af1f5d40f64f9414571cae801491d2fcb7b67ccdee712c4075a835104fb8a34Withdraw Split154487832022-08-31 20:54:0928 days 2 hrs ago0xb785b17f677971dc4956b3844299292724a90262 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00122629 28.42131146
0x8c5308050dc61510003bd38eba032f1ad7ce0f18998acff5b7a06179c9864051Set Approval For...154447232022-08-31 5:17:4728 days 18 hrs ago0x6bfc44690eb5f38346c9eef2ca5aad27e0c66b38 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00059793 12.81970516
0x2a2e546805e16b4704c12553d47b508b5ed4edbdc0a8acb2f5f9028af0c55a83Safe Transfer Fr...154442962022-08-31 3:34:0228 days 20 hrs ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00140285 13.23936461
0x0f538b5e62a3b48b9520cc2a6b8d99e0824021f0396ff76e95cfd80bad2c54c0Transfer From154442442022-08-31 3:23:5428 days 20 hrs ago0x7f2d16f5b94cb29fb9ead07cb46c0e74e6523c26 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.0007399316
0x714bb9d04b7adc79805c3c379d4ec965c7268c106a14b9403f606cf1003ed7c9Public Mint154432302022-08-30 23:28:5829 days 12 mins ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6791.08 Ether0.00115834 11.15774081
0x9e4faa6e6e438b60533f932e0c6cb7dd2bc7d6914d9e87432b1759f27ba0902eWithdraw Split154431862022-08-30 23:21:3029 days 20 mins ago0xb785b17f677971dc4956b3844299292724a90262 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00059462 13.7813767
0x6c78e5d13e29431eb06a611ca683b63dec0d7be9659afb4e70889b2d57ff5151Public Mint154430032022-08-30 22:35:3729 days 1 hr ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6791.56 Ether0.00169771 14.5273773
0xd0b0c0292641d3d358fc15d389faefaaafce860d4e532d63037009ac7939f1f4Public Mint154430002022-08-30 22:34:1429 days 1 hr ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6791.31999999 Ether0.00040698 13.12655331
0xdcb2d71a42efad9bfff96049d8e71b3f3e8f8c5d753d0793cffcc6e1f767dd54Public Mint154365552022-08-29 21:54:3030 days 1 hr ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.12 Ether0.00282052 36.29133463
0x9537fb6af15b3b9477b6a434d7e5016849eaf51bb40da34b9c4e1c61e416cbdbWithdraw Split154365372022-08-29 21:48:2130 days 1 hr ago0xb785b17f677971dc4956b3844299292724a90262 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00064398 14.9253285
0x6338b0d70b1e98a10db6a526c222221c33599caf0965a30938dad511ee108b8dPublic Mint154365182022-08-29 21:43:2830 days 1 hr ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.36 Ether0.00098867 11.7359919
0x03c5266b526d1e0c1aa53b911188166be7c80154e7d1cbe760a9c2013b658fd5Public Mint154356572022-08-29 18:26:3430 days 5 hrs ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6791.68 Ether0.00329906 27.46360765
0x58849d86227d4b27ebadd15e9cb9173dece13f3077b77d4f1c284e0e72e72164Withdraw Split154355862022-08-29 18:06:1730 days 5 hrs ago0xb785b17f677971dc4956b3844299292724a90262 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00069462 16.09893356
0x332a9380f3fa72edc5737205e51d1b53e44cbc6ccb62bc29b6f9dbd984db6947Public Mint154354062022-08-29 17:23:4030 days 6 hrs ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6791.92 Ether0.00338968 26.76438027
0x7c31a1be2dcb29ab8cc7dc44a6b7ea3e73e76e289fb63b4b5ccdbb38b233bdc1Public Mint154326602022-08-29 6:56:4130 days 16 hrs ago0x596ee4c6397f1ef26a58fe99810971fac875f2e9 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.12 Ether0.00057356 5.12479815
0x31cf8bfd56a1b9ff9f70243cd13e1256b09a5d1a9755e9ef59ee839923aa23a3Withdraw Split154240762022-08-27 21:59:0132 days 1 hr ago0xb785b17f677971dc4956b3844299292724a90262 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790 Ether0.00041224 9.5544085
0x7692de53acbabbad5a194ffee504597ff93e6dbc066e1e454bfae3746dde13dcPublic Mint154240682022-08-27 21:56:3132 days 1 hr ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.12 Ether0.00076533 9.84739905
0x32d1bf58d72acd3d8f48057194c294e537583d0a935531eedfbb09d64f0fbf35Public Mint154240612022-08-27 21:54:3732 days 1 hr ago0xe9d99c29b2872784b7d28f10ed37347374fb084b IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.48 Ether0.00072489 8.28405679
0xd673e7be6e62a59d4dcad32ec5c3c017392c71dac844033648ee4d6f3e20ba20Public Mint154151892022-08-26 11:51:0833 days 11 hrs ago0x2420ac35fe78a6eb5b2648354c06076a8b7a1d42 IN  0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790.12 Ether0.00073602 6.5764322
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Latest 22 internal transactions
Parent Txn Hash Block From To Value
0x7af1f5d40f64f9414571cae801491d2fcb7b67ccdee712c4075a835104fb8a34154487832022-08-31 20:54:0928 days 2 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b0.864 Ether
0x7af1f5d40f64f9414571cae801491d2fcb7b67ccdee712c4075a835104fb8a34154487832022-08-31 20:54:0928 days 2 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.216 Ether
0x9e4faa6e6e438b60533f932e0c6cb7dd2bc7d6914d9e87432b1759f27ba0902e154431862022-08-30 23:21:3029 days 20 mins ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b1.344 Ether
0x9e4faa6e6e438b60533f932e0c6cb7dd2bc7d6914d9e87432b1759f27ba0902e154431862022-08-30 23:21:3029 days 20 mins ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.336 Ether
0x9537fb6af15b3b9477b6a434d7e5016849eaf51bb40da34b9c4e1c61e416cbdb154365372022-08-29 21:48:2130 days 1 hr ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b1.632 Ether
0x9537fb6af15b3b9477b6a434d7e5016849eaf51bb40da34b9c4e1c61e416cbdb154365372022-08-29 21:48:2130 days 1 hr ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.408 Ether
0x58849d86227d4b27ebadd15e9cb9173dece13f3077b77d4f1c284e0e72e72164154355862022-08-29 18:06:1730 days 5 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b1.632 Ether
0x58849d86227d4b27ebadd15e9cb9173dece13f3077b77d4f1c284e0e72e72164154355862022-08-29 18:06:1730 days 5 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.408 Ether
0x31cf8bfd56a1b9ff9f70243cd13e1256b09a5d1a9755e9ef59ee839923aa23a3154240762022-08-27 21:59:0132 days 1 hr ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b0.96 Ether
0x31cf8bfd56a1b9ff9f70243cd13e1256b09a5d1a9755e9ef59ee839923aa23a3154240762022-08-27 21:59:0132 days 1 hr ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.24 Ether
0x4dbd2c9687d99eb7d1e720473cf3fe9710a066f093212359bd5cf715905db397153801892022-08-20 22:14:2339 days 1 hr ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b0.384 Ether
0x4dbd2c9687d99eb7d1e720473cf3fe9710a066f093212359bd5cf715905db397153801892022-08-20 22:14:2339 days 1 hr ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.096 Ether
0xf40cfdaa8d00c4e2399fbef59914eeb6d4be451724b35b000429ad3c0b1faf07152765602022-08-04 14:56:2355 days 8 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b1.536 Ether
0xf40cfdaa8d00c4e2399fbef59914eeb6d4be451724b35b000429ad3c0b1faf07152765602022-08-04 14:56:2355 days 8 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.384 Ether
0xedecd86fb016a1baf863545078ad607c33e35d475b11c3c37958acfbc0358bc6151000182022-07-08 5:22:1882 days 18 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b1.824 Ether
0xedecd86fb016a1baf863545078ad607c33e35d475b11c3c37958acfbc0358bc6151000182022-07-08 5:22:1882 days 18 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.456 Ether
0x0196d3940cb52450ab17840bc6492b79765aecfad3e60c00a0132cb0a4cc2234150847012022-07-05 20:24:2685 days 3 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b4.032 Ether
0x0196d3940cb52450ab17840bc6492b79765aecfad3e60c00a0132cb0a4cc2234150847012022-07-05 20:24:2685 days 3 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth1.008 Ether
0x2c657425c3e901fa5bdf69131ea56021ad367a4376f2d85d6b0adff3582ccf6a149703612022-06-16 0:15:20104 days 23 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b2.976 Ether
0x2c657425c3e901fa5bdf69131ea56021ad367a4376f2d85d6b0adff3582ccf6a149703612022-06-16 0:15:20104 days 23 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth0.744 Ether
0xc53ac0ce6b5d7ac4c6b4523086f1281812a518bf0e975b0f963f00f23bfc161f149171392022-06-06 21:28:37114 days 2 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b6790xe9d99c29b2872784b7d28f10ed37347374fb084b13.44 Ether
0xc53ac0ce6b5d7ac4c6b4523086f1281812a518bf0e975b0f963f00f23bfc161f149171392022-06-06 21:28:37114 days 2 hrs ago 0xa264d68dbb11caa1ec4797bcc419cec0a1e6b679ENS Name dolarshop.eth3.36 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
FourHundredDrums

Compiler Version
v0.8.10+commit.fc410830

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
File 1 of 14 : 400drums.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import "erc721a/contracts/ERC721A.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

contract FourHundredDrums is ERC721A, Ownable {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    bytes32 public alMerkleRoot;
    bytes32 public devMerkleRoot;

    string public baseURI;
    string public revealURI;

    uint256 public mintPrice = 0.12 ether;
    uint256 public alMintPrice = 0.1 ether;
    uint256 public maxSupply;
    uint256 public reserveSupply;

    uint256 public maxPublicMint;
    uint256 public maxAlMint;

    bool public isPublicMint;
    bool public isAlMint;
    bool public isDevMint;
    bool public revealed = false;

    mapping(address => uint256) private _mintedWallets;
    mapping(address => uint256) private _alWallets;

    constructor() payable ERC721A("400DRUMS", "DRUMS") {
      maxSupply = 444;
      maxPublicMint = 5;
      maxAlMint = 3;
      reserveSupply = 5;
    }

    // Minting - public, allow list
    function publicMint(uint256 _quantity) external payable {
      require(isPublicMint, "Public minting is not live.");
      require(_mintedWallets[msg.sender] + _quantity <= maxPublicMint, "You reached max per wallet.");
      require(_quantity > 0, "You need to mint at least 1 NFT.");
      require(msg.value >= mintPrice * _quantity, "Insufficient ETH");
      require(maxSupply - reserveSupply >= _tokenIds.current() + _quantity, "Sold out or Exceeds max tokens");

      for (uint256 i = 0; i < _quantity; i++) {
        _mintedWallets[msg.sender]++;
        _tokenIds.current() + i;
      }
      _safeMint(msg.sender, _quantity);
    }

    function alMint(bytes32[] calldata _merkleProof, uint256 _quantity) external payable {
      require(isAlMint, "Allow list minting is not live.");
      require(MerkleProof.verify(_merkleProof, alMerkleRoot, keccak256(abi.encodePacked(msg.sender))), "Address is not on the allow list.");
      require(_alWallets[msg.sender] + _quantity <= maxAlMint, "You reached max per wallet.");
      require(_quantity > 0, "You need to mint at least 1 NFT.");
      require(msg.value >= alMintPrice * _quantity, "Insufficient ETH");
      require(maxSupply - reserveSupply >= _tokenIds.current() + _quantity, "Sold out or Exceeds max tokens");

      for (uint256 i = 0; i < _quantity; i++) {
        _alWallets[msg.sender]++;
        _tokenIds.increment();
      }
      _safeMint(msg.sender, _quantity);
    }

    function devMint(bytes32[] calldata _merkleProof, uint256 _quantity) external {
      require(isDevMint, "Dev mint is not live.");
      require(MerkleProof.verify(_merkleProof, devMerkleRoot, keccak256(abi.encodePacked(msg.sender))), "Address is not on the dev list.");
      require(maxSupply >= _tokenIds.current() + _quantity, "Sold out or Exceeds max tokens");

      for (uint256 i = 0; i < _quantity; i++) {
        _tokenIds.increment();
      }

      _safeMint(msg.sender, _quantity);
    }

    // onlyOwner -- set al merkle root
    function setAlMerkleRoot(bytes32 _merkleRoot) external onlyOwner {
      alMerkleRoot = _merkleRoot;
    }

    // onlyOwner -- set dev merkle root
    function setDevMerkleRoot(bytes32 _merkleRoot) external onlyOwner {
      devMerkleRoot = _merkleRoot;
    }

    // onlyOwner Token / Reveal URI
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
      require(_exists(tokenId), "ERC721A Metadata: URI query for nonexistent token");

      if (revealed == false) {
        return revealURI;
      }

      string memory currentBaseURI = _baseURI();
      return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, Strings.toString(tokenId), ".json")) : "";
    }

    function setRevealURI(string memory _revealURI) external onlyOwner() {
      revealURI = _revealURI;
    }

    function setBaseURI(string memory _newBaseURI) external onlyOwner() {
      baseURI = _newBaseURI;
    }

    function _baseURI() internal view virtual override returns (string memory) {
      return baseURI;
    }

    // onlyOwner Admin functions

    function reveal() external onlyOwner {
      revealed = !revealed;
    }

    function togglePublicMint() external onlyOwner {
      isPublicMint = !isPublicMint;
      isAlMint = false;
      isDevMint = false;
    }

    function toggleAlMint() external onlyOwner {
      isAlMint = !isAlMint;
      isPublicMint = false;
      isDevMint = false;
    }

    function toggleDevMint() external onlyOwner {
      isAlMint = false;
      isPublicMint = false;
      isDevMint = !isDevMint;
    }

    function disableMint() external onlyOwner {
      isPublicMint = false;
      isAlMint = false;
      isDevMint = false;
    }

    function setMaxSupply(uint256 _maxSupply) external onlyOwner {
      maxSupply = _maxSupply;
    }

    function setReserveSupply(uint256 _reserveSupply) external onlyOwner {
      reserveSupply = _reserveSupply;
    }

    function setMaxPublicMint(uint256 _maxPublicMint) external onlyOwner {
      maxPublicMint = _maxPublicMint;
    }

    function setMaxAlMint(uint256 _maxAlMint) external onlyOwner {
      maxAlMint = _maxAlMint;
    }

    function setMintPrice(uint256 _mintPrice) external onlyOwner {
      mintPrice = _mintPrice;
    }

    function setAlMintPrice(uint256 _alMintPrice) external onlyOwner {
      alMintPrice = _alMintPrice;
    }

    // onlyOwner - withdrawl

    function withdrawSplit() public onlyOwner {
      uint256 balance = address(this).balance;
      (bool wallet1, ) = payable(0x23A3f45bD7961B968970D6A69ebE1B5d6513b8Bf).call{value: balance * 20 / 100}("");
      (bool wallet2, ) = payable(0xe9D99C29B2872784b7d28f10ED37347374Fb084B).call{value: address(this).balance}("");
      require(wallet1, "Withdraw 1 failed");
      require(wallet2, "Withdraw 2 failed");
    }

    function withdraw() public onlyOwner {
      (bool wallet1, ) = payable(msg.sender).call{value: address(this).balance}("");
      require(wallet1, "Withdraw 1 failed");
    }
}

File 2 of 14 : ERC721A.sol
// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Context.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';

error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintedQueryForZeroAddress();
error BurnedQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**128 - 1 (max value of uint128).
 */
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
    using Address for address;
    using Strings for uint256;

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
    }

    // Compiler will pack the following 
    // _currentIndex and _burnCounter into a single 256bit word.
    
    // The tokenId of the next token to be minted.
    uint128 internal _currentIndex;

    // The number of tokens burned.
    uint128 internal _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) internal _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex times
        unchecked {
            return _currentIndex - _burnCounter;    
        }
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
     * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
     */
    function tokenByIndex(uint256 index) public view override returns (uint256) {
        uint256 numMintedSoFar = _currentIndex;
        uint256 tokenIdsIdx;

        // Counter overflow is impossible as the loop breaks when
        // uint256 i is equal to another uint256 numMintedSoFar.
        unchecked {
            for (uint256 i; i < numMintedSoFar; i++) {
                TokenOwnership memory ownership = _ownerships[i];
                if (!ownership.burned) {
                    if (tokenIdsIdx == index) {
                        return i;
                    }
                    tokenIdsIdx++;
                }
            }
        }
        revert TokenIndexOutOfBounds();
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
     * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
        if (index >= balanceOf(owner)) revert OwnerIndexOutOfBounds();
        uint256 numMintedSoFar = _currentIndex;
        uint256 tokenIdsIdx;
        address currOwnershipAddr;

        // Counter overflow is impossible as the loop breaks when
        // uint256 i is equal to another uint256 numMintedSoFar.
        unchecked {
            for (uint256 i; i < numMintedSoFar; i++) {
                TokenOwnership memory ownership = _ownerships[i];
                if (ownership.burned) {
                    continue;
                }
                if (ownership.addr != address(0)) {
                    currOwnershipAddr = ownership.addr;
                }
                if (currOwnershipAddr == owner) {
                    if (tokenIdsIdx == index) {
                        return i;
                    }
                    tokenIdsIdx++;
                }
            }
        }

        // Execution should never reach this point.
        revert();
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            interfaceId == type(IERC721Enumerable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(_addressData[owner].balance);
    }

    function _numberMinted(address owner) internal view returns (uint256) {
        if (owner == address(0)) revert MintedQueryForZeroAddress();
        return uint256(_addressData[owner].numberMinted);
    }

    function _numberBurned(address owner) internal view returns (uint256) {
        if (owner == address(0)) revert BurnedQueryForZeroAddress();
        return uint256(_addressData[owner].numberBurned);
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        uint256 curr = tokenId;

        unchecked {
            if (curr < _currentIndex) {
                TokenOwnership memory ownership = _ownerships[curr];
                if (!ownership.burned) {
                    if (ownership.addr != address(0)) {
                        return ownership;
                    }
                    // Invariant: 
                    // There will always be an ownership that has an address and is not burned 
                    // before an ownership that does not have an address and is not burned.
                    // Hence, curr will not underflow.
                    while (true) {
                        curr--;
                        ownership = _ownerships[curr];
                        if (ownership.addr != address(0)) {
                            return ownership;
                        }
                    }
                }
            }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return ownershipOf(tokenId).addr;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
            revert ApprovalCallerNotOwnerNorApproved();
        }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public override {
        if (operator == _msgSender()) revert ApproveToCaller();

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        _transfer(from, to, tokenId);
        if (!_checkOnERC721Received(from, to, tokenId, _data)) {
            revert TransferToNonERC721ReceiverImplementer();
        }
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return tokenId < _currentIndex && !_ownerships[tokenId].burned;
    }

    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, '');
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        _mint(to, quantity, _data, true);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(
        address to,
        uint256 quantity,
        bytes memory _data,
        bool safe
    ) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 3.4e38 (2**128) - 1
        // updatedIndex overflows if _currentIndex + quantity > 3.4e38 (2**128) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;

            for (uint256 i; i < quantity; i++) {
                emit Transfer(address(0), to, updatedIndex);
                if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) {
                    revert TransferToNonERC721ReceiverImplementer();
                }
                updatedIndex++;
            }

            _currentIndex = uint128(updatedIndex);
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);

        bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
            isApprovedForAll(prevOwnership.addr, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, prevOwnership.addr);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**128.
        unchecked {
            _addressData[from].balance -= 1;
            _addressData[to].balance += 1;

            _ownerships[tokenId].addr = to;
            _ownerships[tokenId].startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            if (_ownerships[nextTokenId].addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId < _currentIndex) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        TokenOwnership memory prevOwnership = ownershipOf(tokenId);

        _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, prevOwnership.addr);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**128.
        unchecked {
            _addressData[prevOwnership.addr].balance -= 1;
            _addressData[prevOwnership.addr].numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            _ownerships[tokenId].addr = prevOwnership.addr;
            _ownerships[tokenId].startTimestamp = uint64(block.timestamp);
            _ownerships[tokenId].burned = true;

            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            if (_ownerships[nextTokenId].addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId < _currentIndex) {
                    _ownerships[nextTokenId].addr = prevOwnership.addr;
                    _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(prevOwnership.addr, address(0), tokenId);
        _afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked { 
            _burnCounter++;
        }
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(
        address to,
        uint256 tokenId,
        address owner
    ) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver(to).onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert TransferToNonERC721ReceiverImplementer();
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}

File 3 of 14 : MerkleProof.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = _efficientHash(computedHash, proofElement);
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = _efficientHash(proofElement, computedHash);
            }
        }
        return computedHash;
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

File 4 of 14 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 5 of 14 : Counters.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

File 6 of 14 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 7 of 14 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

File 8 of 14 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

File 9 of 14 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

File 10 of 14 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

File 11 of 14 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 12 of 14 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 13 of 14 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 14 of 14 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

Settings
{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"payable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"ApprovalToCurrentOwner","type":"error"},{"inputs":[],"name":"ApproveToCaller","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"OwnerIndexOutOfBounds","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"TokenIndexOutOfBounds","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"alMerkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"_merkleProof","type":"bytes32[]"},{"internalType":"uint256","name":"_quantity","type":"uint256"}],"name":"alMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"alMintPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"devMerkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"_merkleProof","type":"bytes32[]"},{"internalType":"uint256","name":"_quantity","type":"uint256"}],"name":"devMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"disableMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isAlMint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isDevMint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isPublicMint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxAlMint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxPublicMint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mintPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateM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Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.