{"compiler":{"version":"0.6.11+commit.5ef660b1"},"language":"Solidity","output":{"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"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"Transfer","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":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","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":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"bridgeBurn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_l1Address","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"bridgeInit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"bridgeMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","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"},{"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":[],"name":"isMaster","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l1Address","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l2Gateway","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","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":"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":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"transferAndCall","outputs":[{"internalType":"bool","name":"success","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"}],"devdoc":{"kind":"dev","methods":{"DOMAIN_SEPARATOR()":{"details":"See {IERC20Permit-DOMAIN_SEPARATOR}."},"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}."},"bridgeBurn(address,uint256)":{"details":"only the token bridge can call this","params":{"account":"owner of tokens","amount":"amount of tokens burnt"}},"bridgeInit(address,bytes)":{"details":"the L2 bridge assumes this does not fail or revert","params":{"_data":"encoded symbol/name/decimal data for initial deploy","_l1Address":"L1 address of ERC20"}},"bridgeMint(address,uint256)":{"params":{"account":"recipient of tokens","amount":"amount of tokens minted"}},"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."},"nonces(address)":{"details":"See {IERC20Permit-nonces}."},"permit(address,address,uint256,uint256,uint8,bytes32,bytes32)":{"details":"See {IERC20Permit-permit}."},"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`."},"transferAndCall(address,uint256,bytes)":{"details":"transfer token to a contract address with additional data if the recipient is a contact.","params":{"_data":"The extra data to be passed to the receiving contract.","_to":"The address to transfer to.","_value":"The amount to be transferred."}},"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`."}},"title":"Standard (i.e., non-custom) contract deployed by L2Gateway.sol as L2 ERC20. Includes standard ERC20 interface plus additional methods for deposits/withdraws","version":1},"userdoc":{"kind":"user","methods":{"bridgeBurn(address,uint256)":{"notice":"Burn tokens on L2."},"bridgeInit(address,bytes)":{"notice":"initialize the token"},"bridgeMint(address,uint256)":{"notice":"Mint tokens on L2. Callable path is L1Gateway depositToken (which handles L1 escrow), which triggers L2Gateway, which calls this"}},"version":1}},"settings":{"compilationTarget":{"contracts/tokenbridge/arbitrum/StandardArbERC20.sol":"StandardArbERC20"},"evmVersion":"istanbul","libraries":{},"metadata":{"bytecodeHash":"ipfs","useLiteralContent":true},"optimizer":{"enabled":true,"runs":100},"remappings":[]},"sources":{"@openzeppelin/contracts-upgradeable/cryptography/ECDSAUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSAUpgradeable {\n    /**\n     * @dev Returns the address that signed a hashed message (`hash`) with\n     * `signature`. This address can then be used for verification purposes.\n     *\n     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n     * this function rejects them by requiring the `s` value to be in the lower\n     * half order, and the `v` value to be either 27 or 28.\n     *\n     * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n     * verification to be secure: it is possible to craft signatures that\n     * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n     * this is by receiving a hash of the original message (which may otherwise\n     * be too long), and then calling {toEthSignedMessageHash} on it.\n     */\n    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n        // Check the signature length\n        if (signature.length != 65) {\n            revert(\"ECDSA: invalid signature length\");\n        }\n\n        // Divide the signature in r, s and v variables\n        bytes32 r;\n        bytes32 s;\n        uint8 v;\n\n        // ecrecover takes the signature parameters, and the only way to get them\n        // currently is to use assembly.\n        // solhint-disable-next-line no-inline-assembly\n        assembly {\n            r := mload(add(signature, 0x20))\n            s := mload(add(signature, 0x40))\n            v := byte(0, mload(add(signature, 0x60)))\n        }\n\n        return recover(hash, v, r, s);\n    }\n\n    /**\n     * @dev Overload of {ECDSA-recover-bytes32-bytes-} that receives the `v`,\n     * `r` and `s` signature fields separately.\n     */\n    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {\n        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n        // the valid range for s in (281): 0 < s < secp256k1n \u00f7 2 + 1, and for v in (282): v \u2208 {27, 28}. Most\n        // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n        //\n        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n        // these malleable signatures as well.\n        require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, \"ECDSA: invalid signature 's' value\");\n        require(v == 27 || v == 28, \"ECDSA: invalid signature 'v' value\");\n\n        // If the signature is valid (and not malleable), return the signer address\n        address signer = ecrecover(hash, v, r, s);\n        require(signer != address(0), \"ECDSA: invalid signature\");\n\n        return signer;\n    }\n\n    /**\n     * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n     * replicates the behavior of the\n     * https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]\n     * JSON-RPC method.\n     *\n     * See {recover}.\n     */\n    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n        // 32 is the length in bytes of hash,\n        // enforced by the type signature above\n        return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n    }\n}\n","keccak256":"0xe348c45df01e0705c50ede5063d77111a996722ffb83f0a22979338a32b06887","license":"MIT"},"@openzeppelin/contracts-upgradeable/drafts/EIP712Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\nimport \"../proxy/Initializable.sol\";\n\n/**\n * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.\n *\n * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,\n * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding\n * they need in their contracts using a combination of `abi.encode` and `keccak256`.\n *\n * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding\n * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA\n * ({_hashTypedDataV4}).\n *\n * The implementation of the domain separator was designed to be as efficient as possible while still properly updating\n * the chain id to protect against replay attacks on an eventual fork of the chain.\n *\n * NOTE: This contract implements the version of the encoding known as \"v4\", as implemented by the JSON RPC method\n * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].\n *\n * _Available since v3.4._\n */\nabstract contract EIP712Upgradeable is Initializable {\n    /* solhint-disable var-name-mixedcase */\n    bytes32 private _HASHED_NAME;\n    bytes32 private _HASHED_VERSION;\n    bytes32 private constant _TYPE_HASH = keccak256(\"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\");\n    /* solhint-enable var-name-mixedcase */\n\n    /**\n     * @dev Initializes the domain separator and parameter caches.\n     *\n     * The meaning of `name` and `version` is specified in\n     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:\n     *\n     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.\n     * - `version`: the current major version of the signing domain.\n     *\n     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart\n     * contract upgrade].\n     */\n    function __EIP712_init(string memory name, string memory version) internal initializer {\n        __EIP712_init_unchained(name, version);\n    }\n\n    function __EIP712_init_unchained(string memory name, string memory version) internal initializer {\n        bytes32 hashedName = keccak256(bytes(name));\n        bytes32 hashedVersion = keccak256(bytes(version));\n        _HASHED_NAME = hashedName;\n        _HASHED_VERSION = hashedVersion;\n    }\n\n    /**\n     * @dev Returns the domain separator for the current chain.\n     */\n    function _domainSeparatorV4() internal view returns (bytes32) {\n        return _buildDomainSeparator(_TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash());\n    }\n\n    function _buildDomainSeparator(bytes32 typeHash, bytes32 name, bytes32 version) private view returns (bytes32) {\n        return keccak256(\n            abi.encode(\n                typeHash,\n                name,\n                version,\n                _getChainId(),\n                address(this)\n            )\n        );\n    }\n\n    /**\n     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this\n     * function returns the hash of the fully encoded EIP712 message for this domain.\n     *\n     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:\n     *\n     * ```solidity\n     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(\n     *     keccak256(\"Mail(address to,string contents)\"),\n     *     mailTo,\n     *     keccak256(bytes(mailContents))\n     * )));\n     * address signer = ECDSA.recover(digest, signature);\n     * ```\n     */\n    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {\n        return keccak256(abi.encodePacked(\"\\x19\\x01\", _domainSeparatorV4(), structHash));\n    }\n\n    function _getChainId() private view returns (uint256 chainId) {\n        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n        // solhint-disable-next-line no-inline-assembly\n        assembly {\n            chainId := chainid()\n        }\n    }\n\n    /**\n     * @dev The hash of the name parameter for the EIP712 domain.\n     *\n     * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs\n     * are a concern.\n     */\n    function _EIP712NameHash() internal virtual view returns (bytes32) {\n        return _HASHED_NAME;\n    }\n\n    /**\n     * @dev The hash of the version parameter for the EIP712 domain.\n     *\n     * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs\n     * are a concern.\n     */\n    function _EIP712VersionHash() internal virtual view returns (bytes32) {\n        return _HASHED_VERSION;\n    }\n    uint256[50] private __gap;\n}\n","keccak256":"0x6cd0bc8c149150614ca3d4a3d3d21f844a0ab3032625f34fcfcf1c2c8b351638","license":"MIT"},"@openzeppelin/contracts-upgradeable/drafts/ERC20PermitUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.5 <0.8.0;\n\nimport \"../token/ERC20/ERC20Upgradeable.sol\";\nimport \"./IERC20PermitUpgradeable.sol\";\nimport \"../cryptography/ECDSAUpgradeable.sol\";\nimport \"../utils/CountersUpgradeable.sol\";\nimport \"./EIP712Upgradeable.sol\";\nimport \"../proxy/Initializable.sol\";\n\n/**\n * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * _Available since v3.4._\n */\nabstract contract ERC20PermitUpgradeable is Initializable, ERC20Upgradeable, IERC20PermitUpgradeable, EIP712Upgradeable {\n    using CountersUpgradeable for CountersUpgradeable.Counter;\n\n    mapping (address => CountersUpgradeable.Counter) private _nonces;\n\n    // solhint-disable-next-line var-name-mixedcase\n    bytes32 private _PERMIT_TYPEHASH;\n\n    /**\n     * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\"1\"`.\n     *\n     * It's a good idea to use the same `name` that is defined as the ERC20 token name.\n     */\n    function __ERC20Permit_init(string memory name) internal initializer {\n        __Context_init_unchained();\n        __EIP712_init_unchained(name, \"1\");\n        __ERC20Permit_init_unchained(name);\n    }\n\n    function __ERC20Permit_init_unchained(string memory name) internal initializer {\n        _PERMIT_TYPEHASH = keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n    }\n\n    /**\n     * @dev See {IERC20Permit-permit}.\n     */\n    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public virtual override {\n        // solhint-disable-next-line not-rely-on-time\n        require(block.timestamp <= deadline, \"ERC20Permit: expired deadline\");\n\n        bytes32 structHash = keccak256(\n            abi.encode(\n                _PERMIT_TYPEHASH,\n                owner,\n                spender,\n                value,\n                _nonces[owner].current(),\n                deadline\n            )\n        );\n\n        bytes32 hash = _hashTypedDataV4(structHash);\n\n        address signer = ECDSAUpgradeable.recover(hash, v, r, s);\n        require(signer == owner, \"ERC20Permit: invalid signature\");\n\n        _nonces[owner].increment();\n        _approve(owner, spender, value);\n    }\n\n    /**\n     * @dev See {IERC20Permit-nonces}.\n     */\n    function nonces(address owner) public view override returns (uint256) {\n        return _nonces[owner].current();\n    }\n\n    /**\n     * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view override returns (bytes32) {\n        return _domainSeparatorV4();\n    }\n    uint256[49] private __gap;\n}\n","keccak256":"0xb30c40eb91411e29d23c8184b19fd37e6c2447f685631b798af2871ede483157","license":"MIT"},"@openzeppelin/contracts-upgradeable/drafts/IERC20PermitUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20PermitUpgradeable {\n    /**\n     * @dev Sets `value` as the allowance of `spender` over `owner`'s tokens,\n     * given `owner`'s signed approval.\n     *\n     * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n     * ordering also apply here.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `deadline` must be a timestamp in the future.\n     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n     * over the EIP712-formatted function arguments.\n     * - the signature must use ``owner``'s current nonce (see {nonces}).\n     *\n     * For more information on the signature format, see the\n     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n     * section].\n     */\n    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;\n\n    /**\n     * @dev Returns the current nonce for `owner`. This value must be\n     * included whenever a signature is generated for {permit}.\n     *\n     * Every successful call to {permit} increases ``owner``'s nonce by one. This\n     * prevents a signature from being used multiple times.\n     */\n    function nonces(address owner) external view returns (uint256);\n\n    /**\n     * @dev Returns the domain separator used in the encoding of the signature for `permit`, as defined by {EIP712}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n","keccak256":"0x30c000f3a68d252b09a738c782e0fc9dbf168b81021a195de6102f8d095681ae","license":"MIT"},"@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations with added overflow\n * checks.\n *\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\n * in bugs, because programmers usually assume that an overflow raises an\n * error, which is the standard behavior in high level programming languages.\n * `SafeMath` restores this intuition by reverting the transaction when an\n * operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n */\nlibrary SafeMathUpgradeable {\n    /**\n     * @dev Returns the addition of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        uint256 c = a + b;\n        if (c < a) return (false, 0);\n        return (true, c);\n    }\n\n    /**\n     * @dev Returns the substraction of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        if (b > a) return (false, 0);\n        return (true, a - b);\n    }\n\n    /**\n     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n        // benefit is lost if 'b' is also tested.\n        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n        if (a == 0) return (true, 0);\n        uint256 c = a * b;\n        if (c / a != b) return (false, 0);\n        return (true, c);\n    }\n\n    /**\n     * @dev Returns the division of two unsigned integers, with a division by zero flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        if (b == 0) return (false, 0);\n        return (true, a / b);\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n     *\n     * _Available since v3.4._\n     */\n    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n        if (b == 0) return (false, 0);\n        return (true, a % b);\n    }\n\n    /**\n     * @dev Returns the addition of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity's `+` operator.\n     *\n     * Requirements:\n     *\n     * - Addition cannot overflow.\n     */\n    function add(uint256 a, uint256 b) internal pure returns (uint256) {\n        uint256 c = a + b;\n        require(c >= a, \"SafeMath: addition overflow\");\n        return c;\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, reverting on\n     * overflow (when the result is negative).\n     *\n     * Counterpart to Solidity's `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n        require(b <= a, \"SafeMath: subtraction overflow\");\n        return a - b;\n    }\n\n    /**\n     * @dev Returns the multiplication of two unsigned integers, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity's `*` operator.\n     *\n     * Requirements:\n     *\n     * - Multiplication cannot overflow.\n     */\n    function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n        if (a == 0) return 0;\n        uint256 c = a * b;\n        require(c / a == b, \"SafeMath: multiplication overflow\");\n        return c;\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers, reverting on\n     * division by zero. The result is rounded towards zero.\n     *\n     * Counterpart to Solidity's `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b) internal pure returns (uint256) {\n        require(b > 0, \"SafeMath: division by zero\");\n        return a / b;\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * reverting when dividing by zero.\n     *\n     * Counterpart to Solidity's `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n        require(b > 0, \"SafeMath: modulo by zero\");\n        return a % b;\n    }\n\n    /**\n     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n     * overflow (when the result is negative).\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {trySub}.\n     *\n     * Counterpart to Solidity's `-` operator.\n     *\n     * Requirements:\n     *\n     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b <= a, errorMessage);\n        return a - b;\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n     * division by zero. The result is rounded towards zero.\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {tryDiv}.\n     *\n     * Counterpart to Solidity's `/` operator. Note: this function uses a\n     * `revert` opcode (which leaves remaining gas untouched) while Solidity\n     * uses an invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b > 0, errorMessage);\n        return a / b;\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * reverting with custom message when dividing by zero.\n     *\n     * CAUTION: This function is deprecated because it requires allocating memory for the error\n     * message unnecessarily. For custom revert reasons use {tryMod}.\n     *\n     * Counterpart to Solidity's `%` operator. This function uses a `revert`\n     * opcode (which leaves remaining gas untouched) while Solidity uses an\n     * invalid opcode to revert (consuming all remaining gas).\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        require(b > 0, errorMessage);\n        return a % b;\n    }\n}\n","keccak256":"0x0dd1e9b19801e3e7d900fbf4182d81e1afd23ad7be39504e33df6bbcba91d724","license":"MIT"},"@openzeppelin/contracts-upgradeable/proxy/Initializable.sol":{"content":"// SPDX-License-Identifier: MIT\n\n// solhint-disable-next-line compiler-version\npragma solidity >=0.4.24 <0.8.0;\n\nimport \"../utils/AddressUpgradeable.sol\";\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n */\nabstract contract Initializable {\n\n    /**\n     * @dev Indicates that the contract has been initialized.\n     */\n    bool private _initialized;\n\n    /**\n     * @dev Indicates that the contract is in the process of being initialized.\n     */\n    bool private _initializing;\n\n    /**\n     * @dev Modifier to protect an initializer function from being invoked twice.\n     */\n    modifier initializer() {\n        require(_initializing || _isConstructor() || !_initialized, \"Initializable: contract is already initialized\");\n\n        bool isTopLevelCall = !_initializing;\n        if (isTopLevelCall) {\n            _initializing = true;\n            _initialized = true;\n        }\n\n        _;\n\n        if (isTopLevelCall) {\n            _initializing = false;\n        }\n    }\n\n    /// @dev Returns true if and only if the function is running in the constructor\n    function _isConstructor() private view returns (bool) {\n        return !AddressUpgradeable.isContract(address(this));\n    }\n}\n","keccak256":"0xd8e4eb08dcc1d1860fb347ba5ffd595242b9a1b66d49a47f2b4cb51c3f35017e","license":"MIT"},"@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\nimport \"../../utils/ContextUpgradeable.sol\";\nimport \"./IERC20Upgradeable.sol\";\nimport \"../../math/SafeMathUpgradeable.sol\";\nimport \"../../proxy/Initializable.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * We have followed general OpenZeppelin guidelines: functions revert instead\n * of returning `false` on failure. This behavior is nonetheless conventional\n * and does not conflict with the expectations of ERC20 applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable {\n    using SafeMathUpgradeable for uint256;\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 _name;\n    string private _symbol;\n    uint8 private _decimals;\n\n    /**\n     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with\n     * a default value of 18.\n     *\n     * To select a different value for {decimals}, use {_setupDecimals}.\n     *\n     * All three of these values are immutable: they can only be set once during\n     * construction.\n     */\n    function __ERC20_init(string memory name_, string memory symbol_) internal initializer {\n        __Context_init_unchained();\n        __ERC20_init_unchained(name_, symbol_);\n    }\n\n    function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {\n        _name = name_;\n        _symbol = symbol_;\n        _decimals = 18;\n    }\n\n    /**\n     * @dev Returns the name of the token.\n     */\n    function name() public view virtual returns (string memory) {\n        return _name;\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 virtual 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 virtual returns (uint8) {\n        return _decimals;\n    }\n\n    /**\n     * @dev See {IERC20-totalSupply}.\n     */\n    function totalSupply() public view virtual override returns (uint256) {\n        return _totalSupply;\n    }\n\n    /**\n     * @dev See {IERC20-balanceOf}.\n     */\n    function balanceOf(address account) public view virtual 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 virtual 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 virtual 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 virtual 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     *\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 virtual 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 virtual 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 virtual 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 virtual {\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n        _beforeTokenTransfer(sender, recipient, amount);\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 virtual {\n        require(account != address(0), \"ERC20: mint to the zero address\");\n\n        _beforeTokenTransfer(address(0), account, amount);\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 virtual {\n        require(account != address(0), \"ERC20: burn from the zero address\");\n\n        _beforeTokenTransfer(account, address(0), amount);\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 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 virtual {\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 virtual {\n        _decimals = decimals_;\n    }\n\n    /**\n     * @dev Hook that is called before any transfer of tokens. This includes\n     * minting and burning.\n     *\n     * Calling conditions:\n     *\n     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n     * will be to transferred to `to`.\n     * - when `from` is zero, `amount` tokens will be minted for `to`.\n     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }\n    uint256[44] private __gap;\n}\n","keccak256":"0x506dd0718f9ace50588c13848167df5e04ae16abb56341afb10c31ff149bc79b","license":"MIT"},"@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20Upgradeable {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n","keccak256":"0xa1931c47a617014f858580db625aa0dcf343796f39acd4b5b51effc092a1f0a9","license":"MIT"},"@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.2 <0.8.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        // solhint-disable-next-line no-inline-assembly\n        assembly { size := extcodesize(account) }\n        return size > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value\n        (bool success, ) = recipient.call{ value: amount }(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain`call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n      return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.call{ value: value }(data);\n        return _verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return _verifyCallResult(success, returndata, errorMessage);\n    }\n\n    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                // solhint-disable-next-line no-inline-assembly\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n","keccak256":"0xfc5ea91fa9ceb1961023b2a6c978b902888c52b90847ac7813fe3b79524165f6","license":"MIT"},"@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\nimport \"../proxy/Initializable.sol\";\n\n/*\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with GSN meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n    function __Context_init() internal initializer {\n        __Context_init_unchained();\n    }\n\n    function __Context_init_unchained() internal initializer {\n    }\n    function _msgSender() internal view virtual returns (address payable) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes memory) {\n        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n        return msg.data;\n    }\n    uint256[50] private __gap;\n}\n","keccak256":"0xbbf8a21b9a66c48d45ff771b8563c6df19ba451d63dfb8380a865c1e1f29d1a0","license":"MIT"},"@openzeppelin/contracts-upgradeable/utils/CountersUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\nimport \"../math/SafeMathUpgradeable.sol\";\n\n/**\n * @title Counters\n * @author Matt Condon (@shrugs)\n * @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number\n * of elements in a mapping, issuing ERC721 ids, or counting request ids.\n *\n * Include with `using Counters for Counters.Counter;`\n * Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}\n * overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never\n * directly accessed.\n */\nlibrary CountersUpgradeable {\n    using SafeMathUpgradeable for uint256;\n\n    struct Counter {\n        // This variable should never be directly accessed by users of the library: interactions must be restricted to\n        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add\n        // this feature: see https://github.com/ethereum/solidity/issues/4637\n        uint256 _value; // default: 0\n    }\n\n    function current(Counter storage counter) internal view returns (uint256) {\n        return counter._value;\n    }\n\n    function increment(Counter storage counter) internal {\n        // The {SafeMath} overflow check can be skipped here, see the comment at the top\n        counter._value += 1;\n    }\n\n    function decrement(Counter storage counter) internal {\n        counter._value = counter._value.sub(1);\n    }\n}\n","keccak256":"0xe0162cc9b4d619790be38ce4c184a1cd33d41698629ae6bcac00049f24f6cce8","license":"MIT"},"arb-bridge-eth/contracts/libraries/BytesLib.sol":{"content":"// SPDX-License-Identifier: MIT\n\n/*\n * @title Solidity Bytes Arrays Utils\n * @author Gon\u00e7alo S\u00e1 <goncalo.sa@consensys.net>\n *\n * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.\n *      The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.\n */\n\npragma solidity ^0.6.11;\n\n/* solhint-disable no-inline-assembly */\nlibrary BytesLib {\n    function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {\n        require(_bytes.length >= (_start + 20), \"Read out of bounds\");\n        address tempAddress;\n\n        assembly {\n            tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)\n        }\n\n        return tempAddress;\n    }\n\n    function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) {\n        require(_bytes.length >= (_start + 1), \"Read out of bounds\");\n        uint8 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x1), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toUint(bytes memory _bytes, uint256 _start) internal pure returns (uint256) {\n        require(_bytes.length >= (_start + 32), \"Read out of bounds\");\n        uint256 tempUint;\n\n        assembly {\n            tempUint := mload(add(add(_bytes, 0x20), _start))\n        }\n\n        return tempUint;\n    }\n\n    function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) {\n        require(_bytes.length >= (_start + 32), \"Read out of bounds\");\n        bytes32 tempBytes32;\n\n        assembly {\n            tempBytes32 := mload(add(add(_bytes, 0x20), _start))\n        }\n\n        return tempBytes32;\n    }\n}\n/* solhint-enable no-inline-assembly */\n","keccak256":"0x2c697f7497d4863ef204af621dfebc9d71ee1203e76c3939194b9d7c17b1bcc4","license":"MIT"},"arb-bridge-eth/contracts/libraries/Cloneable.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2019-2020, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npragma solidity ^0.6.11;\n\nimport \"./ICloneable.sol\";\n\ncontract Cloneable is ICloneable {\n    string private constant NOT_CLONE = \"NOT_CLONE\";\n\n    bool private isMasterCopy;\n\n    constructor() public {\n        isMasterCopy = true;\n    }\n\n    function isMaster() external view override returns (bool) {\n        return isMasterCopy;\n    }\n\n    function safeSelfDestruct(address payable dest) internal {\n        require(!isMasterCopy, NOT_CLONE);\n        selfdestruct(dest);\n    }\n}\n","keccak256":"0x09c1eaa640c6dd52b54ef8cbb114a5e99c73c065989eb04c351204b91652cc67","license":"Apache-2.0"},"arb-bridge-eth/contracts/libraries/ICloneable.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2019, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npragma solidity ^0.6.11;\n\ninterface ICloneable {\n    function isMaster() external view returns (bool);\n}\n","keccak256":"0x6caf0d6558086827bd5384a4f52dfceb6af2ab284f381829d4e2cc641ef59b1e","license":"Apache-2.0"},"contracts/tokenbridge/arbitrum/IArbToken.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2020, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @title Minimum expected interface for L2 token that interacts with the L2 token bridge (this is the interface necessary\n * for a custom token that interacts with the bridge, see TestArbCustomToken.sol for an example implementation).\n */\npragma solidity ^0.6.11;\n\ninterface IArbToken {\n    /**\n     * @notice should increase token supply by amount, and should (probably) only be callable by the L1 bridge.\n     */\n    function bridgeMint(address account, uint256 amount) external;\n\n    /**\n     * @notice should decrease token supply by amount, and should (probably) only be callable by the L1 bridge.\n     */\n    function bridgeBurn(address account, uint256 amount) external;\n\n    /**\n     * @return address of layer 1 token\n     */\n    function l1Address() external view returns (address);\n}\n","keccak256":"0x375c6de51c8c7b68f3f5cdadf7164bc3425c6e97d73168fac24e951baca4a2ee","license":"Apache-2.0"},"contracts/tokenbridge/arbitrum/StandardArbERC20.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2020, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npragma solidity ^0.6.11;\n\nimport \"arb-bridge-eth/contracts/libraries/Cloneable.sol\";\nimport \"../libraries/L2GatewayToken.sol\";\nimport \"../libraries/BytesParser.sol\";\nimport \"./IArbToken.sol\";\n\n/**\n * @title Standard (i.e., non-custom) contract deployed by L2Gateway.sol as L2 ERC20. Includes standard ERC20 interface plus additional methods for deposits/withdraws\n */\ncontract StandardArbERC20 is IArbToken, L2GatewayToken, Cloneable {\n    struct ERC20Getters {\n        bool ignoreDecimals;\n        bool ignoreName;\n        bool ignoreSymbol;\n    }\n    ERC20Getters private availableGetters;\n\n    /**\n     * @notice initialize the token\n     * @dev the L2 bridge assumes this does not fail or revert\n     * @param _l1Address L1 address of ERC20\n     * @param _data encoded symbol/name/decimal data for initial deploy\n     */\n    function bridgeInit(address _l1Address, bytes memory _data) public virtual {\n        (bytes memory name_, bytes memory symbol_, bytes memory decimals_) = abi.decode(\n            _data,\n            (bytes, bytes, bytes)\n        );\n        // what if decode reverts? shouldn't as this is encoded by L1 contract\n\n        /*\n         *  if parsing fails, the type's default value gets assigned\n         *  the parsing can fail for different reasons:\n         *      1. method not available in L1 (empty input)\n         *      2. data type is encoded differently in the L1 (trying to abi decode the wrong data type)\n         *  currently (1) returns a parser fails and (2) reverts as there is no `abi.tryDecode`\n         *  https://github.com/ethereum/solidity/issues/10381\n         */\n\n        (bool parseNameSuccess, string memory parsedName) = BytesParser.toString(name_);\n        (bool parseSymbolSuccess, string memory parsedSymbol) = BytesParser.toString(symbol_);\n        (bool parseDecimalSuccess, uint8 parsedDecimals) = BytesParser.toUint8(decimals_);\n\n        L2GatewayToken._initialize(\n            parsedName,\n            parsedSymbol,\n            parsedDecimals,\n            msg.sender, // _l2Gateway,\n            _l1Address // _l1Counterpart\n        );\n\n        // here we assume that (2) would have reverted, so if the parser failed its because the getter isn't available in the L1.\n        // instead of storing on a struct, we could instead set a magic number, at something like `type(uint8).max` or random string\n        // to be more general we instead use an extra storage slot\n        availableGetters = ERC20Getters({\n            ignoreName: !parseNameSuccess,\n            ignoreSymbol: !parseSymbolSuccess,\n            ignoreDecimals: !parseDecimalSuccess\n        });\n    }\n\n    function decimals() public view override returns (uint8) {\n        // no revert message just as in the L1 if you called and the function is not implemented\n        if (availableGetters.ignoreDecimals) revert();\n        return super.decimals();\n    }\n\n    function name() public view override returns (string memory) {\n        // no revert message just as in the L1 if you called and the function is not implemented\n        if (availableGetters.ignoreName) revert();\n        return super.name();\n    }\n\n    function symbol() public view override returns (string memory) {\n        // no revert message just as in the L1 if you called and the function is not implemented\n        if (availableGetters.ignoreSymbol) revert();\n        return super.symbol();\n    }\n}\n","keccak256":"0xd1fd7e2ae29ef2e1bafd53f8d0bf5f6ee865aad1d1ca29d20bc7a21a7f93ec55","license":"Apache-2.0"},"contracts/tokenbridge/libraries/BytesParser.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2020, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npragma solidity ^0.6.11;\n\nimport \"arb-bridge-eth/contracts/libraries/BytesLib.sol\";\n\nlibrary BytesParser {\n    using BytesLib for bytes;\n\n    function toUint8(bytes memory input) internal pure returns (bool success, uint8 res) {\n        if (input.length != 32) {\n            return (false, 0);\n        }\n        // TODO: try catch to handle error\n        uint256 inputNum = abi.decode(input, (uint256));\n        if (inputNum > type(uint8).max) {\n            return (false, 0);\n        }\n        res = uint8(inputNum);\n        success = true;\n    }\n\n    function toString(bytes memory input) internal pure returns (bool success, string memory res) {\n        if (input.length == 0) {\n            success = false;\n            // return default value of string\n        } else if (input.length == 32) {\n            // TODO: can validate anything other than length and being null terminated?\n            if (input[31] != bytes1(0x00)) return (false, res);\n            else success = true;\n\n            // here we assume its a null terminated Bytes32 string\n            // https://github.com/ethereum/solidity/blob/5852972ec148bc041909400affc778dee66d384d/test/libsolidity/semanticTests/externalContracts/_stringutils/stringutils.sol#L89\n            // https://github.com/Arachnid/solidity-stringutils\n            uint256 len = 32;\n            while (len > 0 && input[len - 1] == bytes1(0x00)) {\n                len--;\n            }\n\n            bytes memory inputTruncated = new bytes(len);\n            for (uint8 i = 0; i < len; i++) {\n                inputTruncated[i] = input[i];\n            }\n            // we can't just do `res := input` because of the null values in the end\n            // TODO: can we instead use a bitwise AND? build it dynamically with the length\n            assembly {\n                res := inputTruncated\n            }\n        } else {\n            // TODO: try catch to handle error\n            success = true;\n            res = abi.decode(input, (string));\n        }\n    }\n}\n","keccak256":"0x355d6d6a531eac21b1d2735f0217c107b5de76b45064182cc5a62da63e18631f","license":"Apache-2.0"},"contracts/tokenbridge/libraries/ITransferAndCall.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity >0.6.0 <0.8.0;\n\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol\";\n\ninterface ITransferAndCall is IERC20Upgradeable {\n    function transferAndCall(\n        address to,\n        uint256 value,\n        bytes memory data\n    ) external returns (bool success);\n\n    event Transfer(address indexed from, address indexed to, uint256 value, bytes data);\n}\n\n/**\n * @notice note that implementation of ITransferAndCallReceiver is not expected to return a success bool\n */\ninterface ITransferAndCallReceiver {\n    function onTokenTransfer(\n        address _sender,\n        uint256 _value,\n        bytes memory _data\n    ) external;\n}\n","keccak256":"0xecbd27cfe3fb9c5bb976713d64b1efbebac9c33bdf9829ac307c171528ebd91f","license":"MIT"},"contracts/tokenbridge/libraries/L2GatewayToken.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2020, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npragma solidity ^0.6.11;\n\nimport \"./aeERC20.sol\";\nimport \"./BytesParser.sol\";\nimport \"../arbitrum/IArbToken.sol\";\n\n/**\n * @title Standard (i.e., non-custom) contract used as a base for different L2 Gateways\n */\nabstract contract L2GatewayToken is aeERC20, IArbToken {\n    address public l2Gateway;\n    address public override l1Address;\n\n    modifier onlyGateway() {\n        require(msg.sender == l2Gateway, \"ONLY_GATEWAY\");\n        _;\n    }\n\n    /**\n     * @notice initialize the token\n     * @dev the L2 bridge assumes this does not fail or revert\n     * @param name_ ERC20 token name\n     * @param symbol_ ERC20 token symbol\n     * @param decimals_ ERC20 decimals\n     * @param l2Gateway_ L2 gateway this token communicates with\n     * @param l1Counterpart_ L1 address of ERC20\n     */\n    function _initialize(\n        string memory name_,\n        string memory symbol_,\n        uint8 decimals_,\n        address l2Gateway_,\n        address l1Counterpart_\n    ) internal virtual {\n        require(l2Gateway_ != address(0), \"INVALID_GATEWAY\");\n        require(l2Gateway == address(0), \"ALREADY_INIT\");\n        l2Gateway = l2Gateway_;\n        l1Address = l1Counterpart_;\n\n        aeERC20._initialize(name_, symbol_, decimals_);\n    }\n\n    /**\n     * @notice Mint tokens on L2. Callable path is L1Gateway depositToken (which handles L1 escrow), which triggers L2Gateway, which calls this\n     * @param account recipient of tokens\n     * @param amount amount of tokens minted\n     */\n    function bridgeMint(address account, uint256 amount) external virtual override onlyGateway {\n        _mint(account, amount);\n    }\n\n    /**\n     * @notice Burn tokens on L2.\n     * @dev only the token bridge can call this\n     * @param account owner of tokens\n     * @param amount amount of tokens burnt\n     */\n    function bridgeBurn(address account, uint256 amount) external virtual override onlyGateway {\n        _burn(account, amount);\n    }\n}\n","keccak256":"0xae6b0677d8c8209c871cb0198fa8bb6b8a149aa879ba4a8dfea4a3b974fb9ce3","license":"Apache-2.0"},"contracts/tokenbridge/libraries/TransferAndCallToken.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity >0.6.0 <0.8.0;\n\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol\";\nimport \"./ITransferAndCall.sol\";\n\n// Implementation from https://github.com/smartcontractkit/LinkToken/blob/master/contracts/v0.6/TransferAndCallToken.sol\n/**\n * @notice based on Implementation from https://github.com/smartcontractkit/LinkToken/blob/master/contracts/v0.6/ERC677Token.sol\n * The implementation doesn't return a bool on onTokenTransfer. This is similar to the proposed 677 standard, but still incompatible - thus we don't refer to it as such.\n */\nabstract contract TransferAndCallToken is ERC20Upgradeable, ITransferAndCall {\n    /**\n     * @dev transfer token to a contract address with additional data if the recipient is a contact.\n     * @param _to The address to transfer to.\n     * @param _value The amount to be transferred.\n     * @param _data The extra data to be passed to the receiving contract.\n     */\n    function transferAndCall(\n        address _to,\n        uint256 _value,\n        bytes memory _data\n    ) public virtual override returns (bool success) {\n        super.transfer(_to, _value);\n        emit Transfer(msg.sender, _to, _value, _data);\n        if (isContract(_to)) {\n            contractFallback(_to, _value, _data);\n        }\n        return true;\n    }\n\n    // PRIVATE\n\n    function contractFallback(\n        address _to,\n        uint256 _value,\n        bytes memory _data\n    ) private {\n        ITransferAndCallReceiver receiver = ITransferAndCallReceiver(_to);\n        receiver.onTokenTransfer(msg.sender, _value, _data);\n    }\n\n    function isContract(address _addr) private view returns (bool hasCode) {\n        uint256 length;\n        assembly {\n            length := extcodesize(_addr)\n        }\n        return length > 0;\n    }\n}\n","keccak256":"0xc42c764e5537e3a42e040859a9507f52ef1f7ced96b9ffd4ebdaf5ea0287f2ed","license":"MIT"},"contracts/tokenbridge/libraries/aeERC20.sol":{"content":"// SPDX-License-Identifier: Apache-2.0\n\n/*\n * Copyright 2020, Offchain Labs, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *    http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npragma solidity ^0.6.11;\n\nimport \"@openzeppelin/contracts-upgradeable/drafts/ERC20PermitUpgradeable.sol\";\nimport \"./TransferAndCallToken.sol\";\n\n/// @title Arbitrum extended ERC20\n/// @notice The recommended ERC20 implementation for Layer 2 tokens\n/// @dev This implements the ERC20 standard with transferAndCall extenstion/affordances\ncontract aeERC20 is ERC20PermitUpgradeable, TransferAndCallToken {\n    using AddressUpgradeable for address;\n\n    constructor() public initializer {\n        // this is expected to be used as the logic contract behind a proxy\n        // override the constructor if you don't wish to use the initialize method\n    }\n\n    function _initialize(\n        string memory name_,\n        string memory symbol_,\n        uint8 decimals_\n    ) internal initializer {\n        __ERC20Permit_init(name_);\n        __ERC20_init(name_, symbol_);\n        _setupDecimals(decimals_);\n    }\n}\n","keccak256":"0xc82d513478c224c0ef9c4df986113876808bcc95d3513a308865fad0ef024c79","license":"Apache-2.0"}},"version":1}