oyster/packages/bridge-sdk/contracts/WrappedAsset.json

{
  "contractName": "WrappedAsset",
  "abi": [
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "owner",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "spender",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "uint256",
          "name": "value",
          "type": "uint256"
        }
      ],
      "name": "Approval",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "indexed": true,
          "internalType": "address",
          "name": "to",
          "type": "address"
        },
        {
          "indexed": false,
          "internalType": "uint256",
          "name": "value",
          "type": "uint256"
        }
      ],
      "name": "Transfer",
      "type": "event"
    },
    {
      "inputs": [],
      "name": "assetAddress",
      "outputs": [
        {
          "internalType": "bytes32",
          "name": "",
          "type": "bytes32"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "assetChain",
      "outputs": [
        {
          "internalType": "uint8",
          "name": "",
          "type": "uint8"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "bridge",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "initialized",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "uint8",
          "name": "_assetChain",
          "type": "uint8"
        },
        {
          "internalType": "bytes32",
          "name": "_assetAddress",
          "type": "bytes32"
        },
        {
          "internalType": "uint8",
          "name": "decimals",
          "type": "uint8"
        }
      ],
      "name": "initialize",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "account",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "mint",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "account",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "burn",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "name",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "symbol",
      "outputs": [
        {
          "internalType": "string",
          "name": "",
          "type": "string"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "decimals",
      "outputs": [
        {
          "internalType": "uint8",
          "name": "",
          "type": "uint8"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "totalSupply",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "account",
          "type": "address"
        }
      ],
      "name": "balanceOf",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "recipient",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "transfer",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "owner",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "spender",
          "type": "address"
        }
      ],
      "name": "allowance",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "spender",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "approve",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "sender",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "recipient",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "transferFrom",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "spender",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "addedValue",
          "type": "uint256"
        }
      ],
      "name": "increaseAllowance",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "spender",
          "type": "address"
        },
        {
          "internalType": "uint256",
          "name": "subtractedValue",
          "type": "uint256"
        }
      ],
      "name": "decreaseAllowance",
      "outputs": [
        {
          "internalType": "bool",
          "name": "",
          "type": "bool"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ],
  "metadata": 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\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"allowance(address,address)\":{\"details\":\"See {IERC20-allowance}.\"},\"approve(address,uint256)\":{\"details\":\"See {IERC20-approve}. Requirements: - `spender` cannot be the zero address.\"},\"balanceOf(address)\":{\"details\":\"See {IERC20-balanceOf}.\"},\"decimals()\":{\"details\":\"Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5,05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is called. NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.\"},\"decreaseAllowance(address,uint256)\":{\"details\":\"Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.\"},\"increaseAllowance(address,uint256)\":{\"details\":\"Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address.\"},\"name()\":{\"details\":\"Returns the name of the token.\"},\"symbol()\":{\"details\":\"Returns the symbol of the token, usually a shorter version of the name.\"},\"totalSupply()\":{\"details\":\"See {IERC20-totalSupply}.\"},\"transfer(address,uint256)\":{\"details\":\"See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}; Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for ``sender``'s tokens of at least `amount`.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"/Users/bartosz.lipinski/Workspace/wormhole/ethereum/contracts/WrappedAsset.sol\":\"WrappedAsset\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"/Users/bartosz.lipinski/Workspace/wormhole/ethereum/contracts/WrappedAsset.sol\":{\"keccak256\":\"0x1aca747b823c4d8492ae379cfd9495e8ff19726302d943da56b2bb71aebecc73\",\"license\":\"Apache 2\",\"urls\":[\"bzz-raw://716c755b41c76deb60297664878f07e0972867918fde13c20c196263d3daa554\",\"dweb:/ipfs/QmbrxvDYfcgSjBBnDdXyZJcwd8pYyyrQhYqY5h6DaxWKcy\"]},\"@openzeppelin/contracts/GSN/Context.sol\":{\"keccak256\":\"0x9486045e189facd2e868ece35249872598ef03f1087fb6fa4d1161842daa2287\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://77c3a04ef8453788b14b1ebbc24dd3f0a18ceb2615cd156aac949a611e552af8\",\"dweb:/ipfs/QmcmqWGguRM3iLuF57tcyrN3F6EA63kzeNkDfQuteBnurr\"]},\"@openzeppelin/contracts/math/SafeMath.sol\":{\"keccak256\":\"0xcc78a17dd88fa5a2edc60c8489e2f405c0913b377216a5b26b35656b2d0dab52\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://526dc85e1f9b9b45830e202568d267d93dde7a4fcccf4ad7798dadcd92304d3c\",\"dweb:/ipfs/QmaoXMB972J3cSDLtBq3xBo4jLwqD2uzXTwujtSPqkYVhR\"]},\"@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0x5f02220344881ce43204ae4a6281145a67bc52c2bb1290a791857df3d19d78f5\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://24427744bd3e6cb73c17010119af12a318289c0253a4d9acb8576c9fb3797b08\",\"dweb:/ipfs/QmTLDqpKRBuxGxRAmjgXt9AkXyACW3MtKzi7PYjm5iMfGC\"]},\"@openzeppelin/contracts/utils/Address.sol\":{\"keccak256\":\"0x28911e614500ae7c607a432a709d35da25f3bc5ddc8bd12b278b66358070c0ea\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://256c8c8af5eb072bc473226ab2b2187149b8fc04f5f4a4820db22527f5ce8e3c\",\"dweb:/ipfs/QmRvi5BhnL7Rxf85KrJhwM6RRhukm4tzoctRdgQEheNyiN\"]},\"@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0x8d3cb350f04ff49cfb10aef08d87f19dcbaecc8027b0bed12f3275cd12f38cf0\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://ded47ec7c96750f9bd04bbbc84f659992d4ba901cb7b532a52cd468272cf378f\",\"dweb:/ipfs/QmfBrGtQP7rZEqEg6Wz6jh2N2Kukpj1z5v3CGWmAqrzm96\"]}},\"version\":1}",
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  "source": "// contracts/WrappedAsset.sol\n// SPDX-License-Identifier: Apache 2\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/GSN/Context.sol\";\n\ncontract WrappedAsset is IERC20, Context {\n    uint8 public assetChain;\n    bytes32 public assetAddress;\n    bool public initialized;\n    address public bridge;\n\n    function initialize(uint8 _assetChain, bytes32 _assetAddress, uint8 decimals) public {\n        require(!initialized, \"already initialized\");\n        // Set local fields\n        assetChain = _assetChain;\n        assetAddress = _assetAddress;\n        bridge = msg.sender;\n        initialized = true;\n\n        _symbol = \"WWT\";\n        _decimals = decimals;\n    }\n\n    function mint(address account, uint256 amount) external {\n        require(msg.sender == bridge, \"mint can only be called by the bridge\");\n\n        _mint(account, amount);\n    }\n\n    function burn(address account, uint256 amount) external {\n        require(msg.sender == bridge, \"burn can only be called by the bridge\");\n\n        _burn(account, amount);\n    }\n\n    // Taken from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol\n    // Licensed under MIT\n\n    using SafeMath for uint256;\n    using Address for address;\n\n    mapping(address => uint256) private _balances;\n\n    mapping(address => mapping(address => uint256)) private _allowances;\n\n    uint256 private _totalSupply;\n\n    string private _symbol;\n    uint8 private _decimals = 18;\n\n    /**\n     * @dev Returns the name of the token.\n     */\n    function name() public view returns (string memory) {\n        return string(abi.encodePacked(\"Wormhole Wrapped - \", uintToString(assetChain), \"-\", assetAddressString()));\n    }\n\n    // https://ethereum.stackexchange.com/a/40977\n    function uintToString(uint _i) internal pure returns (string memory _uintAsString) {\n        if (_i == 0) {\n            return \"0\";\n        }\n        uint j = _i;\n        uint len;\n        while (j != 0) {\n            len++;\n            j /= 10;\n        }\n        bytes memory bstr = new bytes(len);\n        uint k = len - 1;\n        while (_i != 0) {\n            bstr[k--] = byte(uint8(48 + _i % 10));\n            _i /= 10;\n        }\n        return string(bstr);\n    }\n\n    // https://ethereum.stackexchange.com/a/58341\n    function assetAddressString() private view returns (string memory) {\n        bytes memory alphabet = \"0123456789abcdef\";\n        bytes32 data = assetAddress;\n\n        bytes memory str = new bytes(2 + data.length * 2);\n        for (uint i = 0; i < data.length; i++) {\n            str[i * 2] = alphabet[uint(uint8(data[i] >> 4))];\n            str[1 + i * 2] = alphabet[uint(uint8(data[i] & 0x0f))];\n        }\n        return string(str);\n    }\n\n    /**\n     * @dev Returns the symbol of the token, usually a shorter version of the\n     * name.\n     */\n    function symbol() public view returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev Returns the number of decimals used to get its user representation.\n     * For example, if `decimals` equals `2`, a balance of `505` tokens should\n     * be displayed to a user as `5,05` (`505 / 10 ** 2`).\n     *\n     * Tokens usually opt for a value of 18, imitating the relationship between\n     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is\n     * called.\n     *\n     * NOTE: This information is only used for _display_ purposes: it in\n     * no way affects any of the arithmetic of the contract, including\n     * {IERC20-balanceOf} and {IERC20-transfer}.\n     */\n    function decimals() public view returns (uint8) {\n        return _decimals;\n    }\n\n    /**\n     * @dev See {IERC20-totalSupply}.\n     */\n    function totalSupply() public view override returns (uint256) {\n        return _totalSupply;\n    }\n\n    /**\n     * @dev See {IERC20-balanceOf}.\n     */\n    function balanceOf(address account) public view override returns (uint256) {\n        return _balances[account];\n    }\n\n    /**\n     * @dev See {IERC20-transfer}.\n     *\n     * Requirements:\n     *\n     * - `recipient` cannot be the zero address.\n     * - the caller must have a balance of at least `amount`.\n     */\n    function transfer(address recipient, uint256 amount) public override returns (bool) {\n        _transfer(_msgSender(), recipient, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-allowance}.\n     */\n    function allowance(address owner, address spender) public view override returns (uint256) {\n        return _allowances[owner][spender];\n    }\n\n    /**\n     * @dev See {IERC20-approve}.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function approve(address spender, uint256 amount) public override returns (bool) {\n        _approve(_msgSender(), spender, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-transferFrom}.\n     *\n     * Emits an {Approval} event indicating the updated allowance. This is not\n     * required by the EIP. See the note at the beginning of {ERC20};\n     *\n     * Requirements:\n     * - `sender` and `recipient` cannot be the zero address.\n     * - `sender` must have a balance of at least `amount`.\n     * - the caller must have allowance for ``sender``'s tokens of at least\n     * `amount`.\n     */\n    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {\n        _transfer(sender, recipient, amount);\n        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, \"ERC20: transfer amount exceeds allowance\"));\n        return true;\n    }\n\n    /**\n     * @dev Atomically increases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {IERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));\n        return true;\n    }\n\n    /**\n     * @dev Atomically decreases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {IERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `spender` must have allowance for the caller of at least\n     * `subtractedValue`.\n     */\n    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, \"ERC20: decreased allowance below zero\"));\n        return true;\n    }\n\n    /**\n     * @dev Moves tokens `amount` from `sender` to `recipient`.\n     *\n     * This is internal function is equivalent to {transfer}, and can be used to\n     * e.g. implement automatic token fees, slashing mechanisms, etc.\n     *\n     * Emits a {Transfer} event.\n     *\n     * Requirements:\n     *\n     * - `sender` cannot be the zero address.\n     * - `recipient` cannot be the zero address.\n     * - `sender` must have a balance of at least `amount`.\n     */\n    function _transfer(address sender, address recipient, uint256 amount) internal {\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n        _balances[sender] = _balances[sender].sub(amount, \"ERC20: transfer amount exceeds balance\");\n        _balances[recipient] = _balances[recipient].add(amount);\n        emit Transfer(sender, recipient, amount);\n    }\n\n    /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n     * the total supply.\n     *\n     * Emits a {Transfer} event with `from` set to the zero address.\n     *\n     * Requirements\n     *\n     * - `to` cannot be the zero address.\n     */\n    function _mint(address account, uint256 amount) internal {\n        require(account != address(0), \"ERC20: mint to the zero address\");\n\n        _totalSupply = _totalSupply.add(amount);\n        _balances[account] = _balances[account].add(amount);\n        emit Transfer(address(0), account, amount);\n    }\n\n    /**\n     * @dev Destroys `amount` tokens from `account`, reducing the\n     * total supply.\n     *\n     * Emits a {Transfer} event with `to` set to the zero address.\n     *\n     * Requirements\n     *\n     * - `account` cannot be the zero address.\n     * - `account` must have at least `amount` tokens.\n     */\n    function _burn(address account, uint256 amount) internal {\n        require(account != address(0), \"ERC20: burn from the zero address\");\n\n        _balances[account] = _balances[account].sub(amount, \"ERC20: burn amount exceeds balance\");\n        _totalSupply = _totalSupply.sub(amount);\n        emit Transfer(account, address(0), amount);\n    }\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.\n     *\n     * This is internal function is equivalent to `approve`, and can be used to\n     * e.g. set automatic allowances for certain subsystems, etc.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `owner` cannot be the zero address.\n     * - `spender` cannot be the zero address.\n     */\n    function _approve(address owner, address spender, uint256 amount) internal {\n        require(owner != address(0), \"ERC20: approve from the zero address\");\n        require(spender != address(0), \"ERC20: approve to the zero address\");\n\n        _allowances[owner][spender] = amount;\n        emit Approval(owner, spender, amount);\n    }\n\n    /**\n     * @dev Sets {decimals} to a value other than the default one of 18.\n     *\n     * WARNING: This function should only be called from the constructor. Most\n     * applications that interact with token contracts will not expect\n     * {decimals} to ever change, and may work incorrectly if it does.\n     */\n    function _setupDecimals(uint8 decimals_) internal {\n        _decimals = decimals_;\n    }\n}\n",
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  "ast": {
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                            "typeIdentifier": "t_address_payable",
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                          "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
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                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$_t_string_memory_ptr_$returns$_t_uint256_$bound_to$_t_uint256_$",
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                          "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$",
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                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
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              "id": 1938,
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              "text": " @dev Moves tokens `amount` from `sender` to `recipient`.\n This is internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`."
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              ],
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          {
            "body": {
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                          "name": "account",
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                              "hexValue": "30",
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                              "nodeType": "Literal",
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                            "typeDescriptions": {
                              "typeIdentifier": "t_type$_t_address_$",
                              "typeString": "type(address)"
                            },
                            "typeName": {
                              "id": 2007,
                              "name": "address",
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                          "id": 2010,
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                          "src": "8394:10:2",
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                          "typeDescriptions": {
                            "typeIdentifier": "t_address_payable",
                            "typeString": "address payable"
                          }
                        },
                        "src": "8383:21:2",
                        "typeDescriptions": {
                          "typeIdentifier": "t_bool",
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                      },
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                                  "isStructConstructorCall": false,
                                  "lValueRequested": false,
                                  "names": [null],
                                  "tryCall": false,
                                  "type": "address payable",
                                  "type_conversion": true
                                },
                                "children": [
                                  {
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                                          "typeIdentifier": "t_rational_0_by_1",
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                                    "attributes": {
                                      "argumentTypes": null,
                                      "hexvalue": "30",
                                      "isConstant": false,
                                      "isLValue": false,
                                      "isPure": true,
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                                      "token": "number",
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                                      "value": "0"
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                            "attributes": {
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                              "hexvalue": "45524332303a20617070726f766520746f20746865207a65726f2061646472657373",
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                              "isLValue": false,
                              "isPure": true,
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                              "subdenomination": null,
                              "token": "string",
                              "type": "literal_string \"ERC20: approve to the zero address\"",
                              "value": "ERC20: approve to the zero address"
                            },
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                            "name": "Literal",
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                        "children": [
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                                  "type": "mapping(address => uint256)"
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                                "children": [
                                  {
                                    "attributes": {
                                      "argumentTypes": null,
                                      "overloadedDeclarations": [null],
                                      "referencedDeclaration": 1548,
                                      "type": "mapping(address => mapping(address => uint256))",
                                      "value": "_allowances"
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                                    "name": "Identifier",
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                                  {
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                                      "value": "owner"
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                                    "name": "Identifier",
                                    "src": "9950:5:2"
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                                "id": 2123,
                                "name": "IndexAccess",
                                "src": "9938:18:2"
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                              {
                                "attributes": {
                                  "argumentTypes": null,
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                                  "referencedDeclaration": 2095,
                                  "type": "address",
                                  "value": "spender"
                                },
                                "id": 2122,
                                "name": "Identifier",
                                "src": "9957:7:2"
                              }
                            ],
                            "id": 2124,
                            "name": "IndexAccess",
                            "src": "9938:27:2"
                          },
                          {
                            "attributes": {
                              "argumentTypes": null,
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 2097,
                              "type": "uint256",
                              "value": "amount"
                            },
                            "id": 2125,
                            "name": "Identifier",
                            "src": "9968:6:2"
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                        ],
                        "id": 2126,
                        "name": "Assignment",
                        "src": "9938:36:2"
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                    "id": 2127,
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                  {
                    "children": [
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                          "names": [null],
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                          "type": "tuple()",
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                        },
                        "children": [
                          {
                            "attributes": {
                              "argumentTypes": [
                                {
                                  "typeIdentifier": "t_address",
                                  "typeString": "address"
                                },
                                {
                                  "typeIdentifier": "t_address",
                                  "typeString": "address"
                                },
                                {
                                  "typeIdentifier": "t_uint256",
                                  "typeString": "uint256"
                                }
                              ],
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 3085,
                              "type": "function (address,address,uint256)",
                              "value": "Approval"
                            },
                            "id": 2128,
                            "name": "Identifier",
                            "src": "9989:8:2"
                          },
                          {
                            "attributes": {
                              "argumentTypes": null,
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 2093,
                              "type": "address",
                              "value": "owner"
                            },
                            "id": 2129,
                            "name": "Identifier",
                            "src": "9998:5:2"
                          },
                          {
                            "attributes": {
                              "argumentTypes": null,
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 2095,
                              "type": "address",
                              "value": "spender"
                            },
                            "id": 2130,
                            "name": "Identifier",
                            "src": "10005:7:2"
                          },
                          {
                            "attributes": {
                              "argumentTypes": null,
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 2097,
                              "type": "uint256",
                              "value": "amount"
                            },
                            "id": 2131,
                            "name": "Identifier",
                            "src": "10014:6:2"
                          }
                        ],
                        "id": 2132,
                        "name": "FunctionCall",
                        "src": "9989:32:2"
                      }
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                    "id": 2133,
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                    "src": "9984:37:2"
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                "id": 2134,
                "name": "Block",
                "src": "9771:257:2"
              }
            ],
            "id": 2135,
            "name": "FunctionDefinition",
            "src": "9696:332:2"
          },
          {
            "attributes": {
              "implemented": true,
              "isConstructor": false,
              "kind": "function",
              "modifiers": [null],
              "name": "_setupDecimals",
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              "scope": 2147,
              "stateMutability": "nonpayable",
              "virtual": false,
              "visibility": "internal"
            },
            "children": [
              {
                "attributes": {
                  "text": " @dev Sets {decimals} to a value other than the default one of 18.\n WARNING: This function should only be called from the constructor. Most\n applications that interact with token contracts will not expect\n {decimals} to ever change, and may work incorrectly if it does."
                },
                "id": 2136,
                "name": "StructuredDocumentation",
                "src": "10034:312:2"
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                    "attributes": {
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                      "mutability": "mutable",
                      "name": "decimals_",
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                      "stateVariable": false,
                      "storageLocation": "default",
                      "type": "uint8",
                      "value": null,
                      "visibility": "internal"
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                    "children": [
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                        "attributes": {
                          "name": "uint8",
                          "type": "uint8"
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                        "src": "10375:5:2"
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                    "src": "10375:15:2"
                  }
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                "name": "ParameterList",
                "src": "10374:17:2"
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                "attributes": {
                  "parameters": [null]
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                "children": [],
                "id": 2140,
                "name": "ParameterList",
                "src": "10401:0:2"
              },
              {
                "children": [
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                    "children": [
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                          "operator": "=",
                          "type": "uint8"
                        },
                        "children": [
                          {
                            "attributes": {
                              "argumentTypes": null,
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 1555,
                              "type": "uint8",
                              "value": "_decimals"
                            },
                            "id": 2141,
                            "name": "Identifier",
                            "src": "10411:9:2"
                          },
                          {
                            "attributes": {
                              "argumentTypes": null,
                              "overloadedDeclarations": [null],
                              "referencedDeclaration": 2138,
                              "type": "uint8",
                              "value": "decimals_"
                            },
                            "id": 2142,
                            "name": "Identifier",
                            "src": "10423:9:2"
                          }
                        ],
                        "id": 2143,
                        "name": "Assignment",
                        "src": "10411:21:2"
                      }
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                    "name": "ExpressionStatement",
                    "src": "10411:21:2"
                  }
                ],
                "id": 2145,
                "name": "Block",
                "src": "10401:38:2"
              }
            ],
            "id": 2146,
            "name": "FunctionDefinition",
            "src": "10351:88:2"
          }
        ],
        "id": 2147,
        "name": "ContractDefinition",
        "src": "304:10137:2"
      }
    ],
    "id": 2148,
    "name": "SourceUnit",
    "src": "67:10375:2"
  },
  "compiler": {
    "name": "solc",
    "version": "0.6.12+commit.27d51765.Emscripten.clang"
  },
  "networks": {},
  "schemaVersion": "3.3.4",
  "updatedAt": "2021-04-12T21:53:29.906Z",
  "devdoc": {
    "kind": "dev",
    "methods": {
      "allowance(address,address)": {
        "details": "See {IERC20-allowance}."
      },
      "approve(address,uint256)": {
        "details": "See {IERC20-approve}. Requirements: - `spender` cannot be the zero address."
      },
      "balanceOf(address)": {
        "details": "See {IERC20-balanceOf}."
      },
      "decimals()": {
        "details": "Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5,05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is called. NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}."
      },
      "decreaseAllowance(address,uint256)": {
        "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`."
      },
      "increaseAllowance(address,uint256)": {
        "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address."
      },
      "name()": {
        "details": "Returns the name of the token."
      },
      "symbol()": {
        "details": "Returns the symbol of the token, usually a shorter version of the name."
      },
      "totalSupply()": {
        "details": "See {IERC20-totalSupply}."
      },
      "transfer(address,uint256)": {
        "details": "See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`."
      },
      "transferFrom(address,address,uint256)": {
        "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}; Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for ``sender``'s tokens of at least `amount`."
      }
    },
    "version": 1
  },
  "userdoc": {
    "kind": "user",
    "methods": {},
    "version": 1
  }
}