{
  "contractName": "NFTRestoreContract",
  "abi": [
    {
      "inputs": [],
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "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": "from",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "Transfer",
      "type": "event"
    },
    {
      "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": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "getApproved",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "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": "name",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "ownerOf",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "recipients",
      "outputs": [
        {
          "internalType": "contract ERC721",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "safeTransferFrom",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        },
        {
          "internalType": "bytes",
          "name": "_data",
          "type": "bytes"
        }
      ],
      "name": "safeTransferFrom",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "operator",
          "type": "address"
        },
        {
          "internalType": "bool",
          "name": "approved",
          "type": "bool"
        }
      ],
      "name": "setApprovalForAll",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "bytes4",
          "name": "interfaceId",
          "type": "bytes4"
        }
      ],
      "name": "supportsInterface",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "symbol",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "index",
          "type": "uint256"
        }
      ],
      "name": "tokenByIndex",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "owner",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "index",
          "type": "uint256"
        }
      ],
      "name": "tokenOfOwnerByIndex",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "tokenURI",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "totalSupply",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "transferFrom",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "contract ERC721",
          "name": "_recipients",
          "type": "address"
        }
      ],
      "name": "setRecipients",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "_account",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "_tokenId",
          "type": "uint256"
        }
      ],
      "name": "mint",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint256",
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "burn",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "_origOldAccount",
          "type": "address"
        }
      ],
      "name": "checkRestoreRight",
      "outputs": [],
      "stateMutability": "view",
      "type": "function"
    }
  ],
  "metadata": "{\"compiler\":{\"version\":\"0.7.6+commit.7338295f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"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\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"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\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"burn\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_origOldAccount\",\"type\":\"address\"}],\"name\":\"checkRestoreRight\",\"outputs\":[],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"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\":[{\"internalType\":\"address\",\"name\":\"_account\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"_tokenId\",\"type\":\"uint256\"}],\"name\":\"mint\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"recipients\",\"outputs\":[{\"internalType\":\"contract ERC721\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"contract ERC721\",\"name\":\"_recipients\",\"type\":\"address\"}],\"name\":\"setRecipients\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenByIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenOfOwnerByIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"tokenURI\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"author\":\"Victor Porton FIXME: Combine both NFTs to one ERC-1155 for better interoperability?\",\"kind\":\"dev\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"See {IERC721-approve}.\"},\"balanceOf(address)\":{\"details\":\"See {IERC721-balanceOf}.\"},\"baseURI()\":{\"details\":\"Returns the base URI set via {_setBaseURI}. This will be automatically added as a prefix in {tokenURI} to each token's URI, or to the token ID if no specific URI is set for that token ID.\"},\"getApproved(uint256)\":{\"details\":\"See {IERC721-getApproved}.\"},\"isApprovedForAll(address,address)\":{\"details\":\"See {IERC721-isApprovedForAll}.\"},\"name()\":{\"details\":\"See {IERC721Metadata-name}.\"},\"ownerOf(uint256)\":{\"details\":\"See {IERC721-ownerOf}.\"},\"safeTransferFrom(address,address,uint256)\":{\"details\":\"See {IERC721-safeTransferFrom}.\"},\"safeTransferFrom(address,address,uint256,bytes)\":{\"details\":\"See {IERC721-safeTransferFrom}.\"},\"setApprovalForAll(address,bool)\":{\"details\":\"See {IERC721-setApprovalForAll}.\"},\"supportsInterface(bytes4)\":{\"details\":\"See {IERC165-supportsInterface}. Time complexity O(1), guaranteed to always use less than 30 000 gas.\"},\"symbol()\":{\"details\":\"See {IERC721Metadata-symbol}.\"},\"tokenByIndex(uint256)\":{\"details\":\"See {IERC721Enumerable-tokenByIndex}.\"},\"tokenOfOwnerByIndex(address,uint256)\":{\"details\":\"See {IERC721Enumerable-tokenOfOwnerByIndex}.\"},\"tokenURI(uint256)\":{\"details\":\"See {IERC721Metadata-tokenURI}.\"},\"totalSupply()\":{\"details\":\"See {IERC721Enumerable-totalSupply}.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC721-transferFrom}.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{\"burn(uint256)\":{\"notice\":\"It's useful for transfers of the recipient token, to avoid transferring both tokens.\"},\"setRecipients(address)\":{\"notice\":\"For internal use.\"}},\"notice\":\"Account restoration contract controlled by 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  "source": "// SPDX-License-Identifier: LGPL-3.0-or-later\npragma solidity ^0.7.1;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\n\n/// @notice Account restoration contract controlled by NFT.\n/// @author Victor Porton\n/// FIXME: Combine both NFTs to one ERC-1155 for better interoperability?\ncontract NFTRestoreContract is ERC721 {\n    ERC721 public recipients;\n    \n    constructor() ERC721(\"Right to control your salary.\", \"TakeMySalary\") {\n        recipients = ERC721(msg.sender);\n    }\n\n    /// For internal use.\n    function setRecipients(ERC721 _recipients) public virtual onlyRecipients {\n        recipients = _recipients;\n    }\n\n    function mint(address _account, uint256 _tokenId) public virtual onlyRecipients {\n        require(recipients.ownerOf(_tokenId) == _account, \"You are not owner.\");\n        _mint(_account, _tokenId);\n    }\n\n    /// It's useful for transfers of the recipient token, to avoid transferring both tokens.\n    function burn(uint256 tokenId) public virtual {\n        require(_isApprovedOrOwner(_msgSender(), tokenId), \"ERC721: transfer caller is not owner nor approved\");\n        _burn(tokenId);\n    }\n\n    function checkRestoreRight(address _origOldAccount) public view {\n        require(ownerOf(uint256(_origOldAccount)) == msg.sender, \"No restore right.\");\n    }\n\n    modifier onlyRecipients {\n        require(msg.sender == address(recipients), \"Only system\");\n        _;\n    }\n}\n",
  "sourcePath": "/home/user/Projects/future-contracts/contracts/NFTRestoreContract.sol",
  "ast": {
    "absolutePath": "/home/user/Projects/future-contracts/contracts/NFTRestoreContract.sol",
    "exportedSymbols": {
      "Address": [
        5953
      ],
      "Context": [
        3928
      ],
      "ERC165": [
        4094
      ],
      "ERC721": [
        5490
      ],
      "EnumerableMap": [
        6408
      ],
      "EnumerableSet": [
        6888
      ],
      "IERC165": [
        4106
      ],
      "IERC721": [
        5633
      ],
      "IERC721Enumerable": [
        5664
      ],
      "IERC721Metadata": [
        5691
      ],
      "IERC721Receiver": [
        5709
      ],
      "NFTRestoreContract": [
        3657
      ],
      "Ownable": [
        4037
      ],
      "SafeMath": [
        4302
      ],
      "Strings": [
        6975
      ]
    },
    "id": 3658,
    "license": "LGPL-3.0-or-later",
    "nodeType": "SourceUnit",
    "nodes": [
      {
        "id": 3542,
        "literals": [
          "solidity",
          "^",
          "0.7",
          ".1"
        ],
        "nodeType": "PragmaDirective",
        "src": "46:23:6"
      },
      {
        "absolutePath": "@openzeppelin/contracts/token/ERC721/ERC721.sol",
        "file": "@openzeppelin/contracts/token/ERC721/ERC721.sol",
        "id": 3543,
        "nodeType": "ImportDirective",
        "scope": 3658,
        "sourceUnit": 5491,
        "src": "71:57:6",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "absolutePath": "@openzeppelin/contracts/access/Ownable.sol",
        "file": "@openzeppelin/contracts/access/Ownable.sol",
        "id": 3544,
        "nodeType": "ImportDirective",
        "scope": 3658,
        "sourceUnit": 4038,
        "src": "129:52:6",
        "symbolAliases": [],
        "unitAlias": ""
      },
      {
        "abstract": false,
        "baseContracts": [
          {
            "baseName": {
              "id": 3546,
              "name": "ERC721",
              "nodeType": "UserDefinedTypeName",
              "referencedDeclaration": 5490,
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                      "name": "_origOldAccount",
                      "scope": 3641,
                      "stateVariable": false,
                      "storageLocation": "default",
                      "type": "address",
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                    "children": [
                      {
                        "attributes": {
                          "name": "address",
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                          "type": "address"
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                        "name": "ElementaryTypeName",
                        "src": "1217:7:6"
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                    ],
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                ],
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                "children": [
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                    "children": [
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                                  "typeIdentifier": "t_bool",
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                                  "typeIdentifier": "t_stringliteral_d855f0a09510866d6bedb8e63b3d9cbf57da6d6676a657db329b3142fc75eb31",
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                                4294967278
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                              "referencedDeclaration": 4294967278,
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                            "name": "Identifier",
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                          {
                            "attributes": {
                              "commonType": {
                                "typeIdentifier": "t_address",
                                "typeString": "address"
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                              "isConstant": false,
                              "isLValue": false,
                              "isPure": false,
                              "lValueRequested": false,
                              "operator": "==",
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                            "children": [
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                                "attributes": {
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                                  "names": [
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                                  "tryCall": false,
                                  "type": "address",
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                                "children": [
                                  {
                                    "attributes": {
                                      "argumentTypes": [
                                        {
                                          "typeIdentifier": "t_uint256",
                                          "typeString": "uint256"
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                                      "overloadedDeclarations": [
                                        null
                                      ],
                                      "referencedDeclaration": 4707,
                                      "type": "function (uint256) view returns (address)",
                                      "value": "ownerOf"
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                                    "id": 3628,
                                    "name": "Identifier",
                                    "src": "1272:7:6"
                                  },
                                  {
                                    "attributes": {
                                      "isConstant": false,
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                                      "lValueRequested": false,
                                      "names": [
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                                      "tryCall": false,
                                      "type": "uint256",
                                      "type_conversion": true
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                                    "children": [
                                      {
                                        "attributes": {
                                          "argumentTypes": [
                                            {
                                              "typeIdentifier": "t_address",
                                              "typeString": "address"
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                                          "isConstant": false,
                                          "isLValue": false,
                                          "isPure": true,
                                          "lValueRequested": false,
                                          "type": "type(uint256)"
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                                        "children": [
                                          {
                                            "attributes": {
                                              "name": "uint256"
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                                            "id": 3629,
                                            "name": "ElementaryTypeName",
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                                        ],
                                        "id": 3630,
                                        "name": "ElementaryTypeNameExpression",
                                        "src": "1280:7:6"
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                                      {
                                        "attributes": {
                                          "overloadedDeclarations": [
                                            null
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                                          "referencedDeclaration": 3624,
                                          "type": "address",
                                          "value": "_origOldAccount"
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                                        "id": 3631,
                                        "name": "Identifier",
                                        "src": "1288:15:6"
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                                    ],
                                    "id": 3632,
                                    "name": "FunctionCall",
                                    "src": "1280:24:6"
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                                "id": 3633,
                                "name": "FunctionCall",
                                "src": "1272:33:6"
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                              {
                                "attributes": {
                                  "isConstant": false,
                                  "isLValue": false,
                                  "isPure": false,
                                  "lValueRequested": false,
                                  "member_name": "sender",
                                  "type": "address payable"
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                                    "attributes": {
                                      "overloadedDeclarations": [
                                        null
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                                      "referencedDeclaration": 4294967281,
                                      "type": "msg",
                                      "value": "msg"
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                                    "id": 3634,
                                    "name": "Identifier",
                                    "src": "1309:3:6"
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                                ],
                                "id": 3635,
                                "name": "MemberAccess",
                                "src": "1309:10:6"
                              }
                            ],
                            "id": 3636,
                            "name": "BinaryOperation",
                            "src": "1272:47:6"
                          },
                          {
                            "attributes": {
                              "hexvalue": "4e6f20726573746f72652072696768742e",
                              "isConstant": false,
                              "isLValue": false,
                              "isPure": true,
                              "lValueRequested": false,
                              "token": "string",
                              "type": "literal_string \"No restore right.\"",
                              "value": "No restore right."
                            },
                            "id": 3637,
                            "name": "Literal",
                            "src": "1321:19:6"
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                        ],
                        "id": 3638,
                        "name": "FunctionCall",
                        "src": "1264:77:6"
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                    "id": 3639,
                    "name": "ExpressionStatement",
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                "id": 3640,
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                "src": "1254:94:6"
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            ],
            "id": 3641,
            "name": "FunctionDefinition",
            "src": "1190:158:6"
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          {
            "attributes": {
              "name": "onlyRecipients",
              "virtual": false,
              "visibility": "internal"
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              {
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                    null
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                },
                "children": [],
                "id": 3642,
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                                  "typeIdentifier": "t_bool",
                                  "typeString": "bool"
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                                  "typeIdentifier": "t_stringliteral_90967bbd09b28d06f80600e85824b142e98b0bcfe12d31a9590cbadff1aa3677",
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                              "value": "require"
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                            "name": "Identifier",
                            "src": "1388:7:6"
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                          {
                            "attributes": {
                              "commonType": {
                                "typeIdentifier": "t_address",
                                "typeString": "address"
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                              "isLValue": false,
                              "isPure": false,
                              "lValueRequested": false,
                              "operator": "==",
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                                  "isConstant": false,
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                                  "lValueRequested": false,
                                  "member_name": "sender",
                                  "type": "address payable"
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                                      "type": "msg",
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                                "id": 3645,
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                                          "typeIdentifier": "t_contract$_ERC721_$5490",
                                          "typeString": "contract ERC721"
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                                      "isPure": true,
                                      "lValueRequested": false,
                                      "type": "type(address)"
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                                          "name": "address"
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                                      "type": "contract ERC721",
                                      "value": "recipients"
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                                    "name": "Identifier",
                                    "src": "1418:10:6"
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                              "lValueRequested": false,
                              "token": "string",
                              "type": "literal_string \"Only system\"",
                              "value": "Only system"
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                    "id": 3653,
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                    "id": 3654,
                    "name": "PlaceholderStatement",
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                ],
                "id": 3655,
                "name": "Block",
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            ],
            "id": 3656,
            "name": "ModifierDefinition",
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        ],
        "id": 3657,
        "name": "ContractDefinition",
        "src": "343:1122:6"
      }
    ],
    "id": 3658,
    "name": "SourceUnit",
    "src": "46:1420:6"
  },
  "compiler": {
    "name": "solc",
    "version": "0.7.6+commit.7338295f.Emscripten.clang"
  },
  "networks": {},
  "schemaVersion": "3.4.1",
  "updatedAt": "2021-06-14T03:10:13.614Z",
  "devdoc": {
    "author": "Victor Porton FIXME: Combine both NFTs to one ERC-1155 for better interoperability?",
    "kind": "dev",
    "methods": {
      "approve(address,uint256)": {
        "details": "See {IERC721-approve}."
      },
      "balanceOf(address)": {
        "details": "See {IERC721-balanceOf}."
      },
      "baseURI()": {
        "details": "Returns the base URI set via {_setBaseURI}. This will be automatically added as a prefix in {tokenURI} to each token's URI, or to the token ID if no specific URI is set for that token ID."
      },
      "getApproved(uint256)": {
        "details": "See {IERC721-getApproved}."
      },
      "isApprovedForAll(address,address)": {
        "details": "See {IERC721-isApprovedForAll}."
      },
      "name()": {
        "details": "See {IERC721Metadata-name}."
      },
      "ownerOf(uint256)": {
        "details": "See {IERC721-ownerOf}."
      },
      "safeTransferFrom(address,address,uint256)": {
        "details": "See {IERC721-safeTransferFrom}."
      },
      "safeTransferFrom(address,address,uint256,bytes)": {
        "details": "See {IERC721-safeTransferFrom}."
      },
      "setApprovalForAll(address,bool)": {
        "details": "See {IERC721-setApprovalForAll}."
      },
      "supportsInterface(bytes4)": {
        "details": "See {IERC165-supportsInterface}. Time complexity O(1), guaranteed to always use less than 30 000 gas."
      },
      "symbol()": {
        "details": "See {IERC721Metadata-symbol}."
      },
      "tokenByIndex(uint256)": {
        "details": "See {IERC721Enumerable-tokenByIndex}."
      },
      "tokenOfOwnerByIndex(address,uint256)": {
        "details": "See {IERC721Enumerable-tokenOfOwnerByIndex}."
      },
      "tokenURI(uint256)": {
        "details": "See {IERC721Metadata-tokenURI}."
      },
      "totalSupply()": {
        "details": "See {IERC721Enumerable-totalSupply}."
      },
      "transferFrom(address,address,uint256)": {
        "details": "See {IERC721-transferFrom}."
      }
    },
    "version": 1
  },
  "userdoc": {
    "kind": "user",
    "methods": {
      "burn(uint256)": {
        "notice": "It's useful for transfers of the recipient token, to avoid transferring both tokens."
      },
      "setRecipients(address)": {
        "notice": "For internal use."
      }
    },
    "notice": "Account restoration contract controlled by NFT.",
    "version": 1
  }
}