@venusprotocol/governance-contracts/artifacts/build-info/c301652843ee5deb64bb2720564f49d0.json

### Prerequisites

{"id":"c301652843ee5deb64bb2720564f49d0","_format":"hh-sol-build-info-1","solcVersion":"0.5.16","solcLongVersion":"0.5.16+commit.9c3226ce","input":{"language":"Solidity","sources":{"@venusprotocol/venus-protocol/contracts/Tokens/XVS/XVS.sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"../../Utils/Tokenlock.sol\";\n\ncontract XVS is Tokenlock {\n    /// @notice BEP-20 token name for this token\n    string public constant name = \"Venus\";\n\n    /// @notice BEP-20 token symbol for this token\n    string public constant symbol = \"XVS\";\n\n    /// @notice BEP-20 token decimals for this token\n    uint8 public constant decimals = 18;\n\n    /// @notice Total number of tokens in circulation\n    uint public constant totalSupply = 30000000e18; // 30 million XVS\n\n    /// @notice Allowance amounts on behalf of others\n    mapping(address => mapping(address => uint96)) internal allowances;\n\n    /// @notice Official record of token balances for each account\n    mapping(address => uint96) internal balances;\n\n    /// @notice A record of each accounts delegate\n    mapping(address => address) public delegates;\n\n    /// @notice A checkpoint for marking number of votes from a given block\n    struct Checkpoint {\n        uint32 fromBlock;\n        uint96 votes;\n    }\n\n    /// @notice A record of votes checkpoints for each account, by index\n    mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;\n\n    /// @notice The number of checkpoints for each account\n    mapping(address => uint32) public numCheckpoints;\n\n    /// @notice The EIP-712 typehash for the contract's domain\n    bytes32 public constant DOMAIN_TYPEHASH =\n        keccak256(\"EIP712Domain(string name,uint256 chainId,address verifyingContract)\");\n\n    /// @notice The EIP-712 typehash for the delegation struct used by the contract\n    bytes32 public constant DELEGATION_TYPEHASH =\n        keccak256(\"Delegation(address delegatee,uint256 nonce,uint256 expiry)\");\n\n    /// @notice A record of states for signing / validating signatures\n    mapping(address => uint) public nonces;\n\n    /// @notice An event thats emitted when an account changes its delegate\n    event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);\n\n    /// @notice An event thats emitted when a delegate account's vote balance changes\n    event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);\n\n    /// @notice The standard BEP-20 transfer event\n    event Transfer(address indexed from, address indexed to, uint256 amount);\n\n    /// @notice The standard BEP-20 approval event\n    event Approval(address indexed owner, address indexed spender, uint256 amount);\n\n    /**\n     * @notice Construct a new XVS token\n     * @param account The initial account to grant all the tokens\n     */\n    constructor(address account) public {\n        balances[account] = uint96(totalSupply);\n        emit Transfer(address(0), account, totalSupply);\n    }\n\n    /**\n     * @notice Get the number of tokens `spender` is approved to spend on behalf of `account`\n     * @param account The address of the account holding the funds\n     * @param spender The address of the account spending the funds\n     * @return The number of tokens approved\n     */\n    function allowance(address account, address spender) external view returns (uint) {\n        return allowances[account][spender];\n    }\n\n    /**\n     * @notice Approve `spender` to transfer up to `amount` from `src`\n     * @dev This will overwrite the approval amount for `spender`\n     * @param spender The address of the account which may transfer tokens\n     * @param rawAmount The number of tokens that are approved (2^256-1 means infinite)\n     * @return Whether or not the approval succeeded\n     */\n    function approve(address spender, uint rawAmount) external validLock returns (bool) {\n        uint96 amount;\n        if (rawAmount == uint(-1)) {\n            amount = uint96(-1);\n        } else {\n            amount = safe96(rawAmount, \"XVS::approve: amount exceeds 96 bits\");\n        }\n\n        allowances[msg.sender][spender] = amount;\n\n        emit Approval(msg.sender, spender, amount);\n        return true;\n    }\n\n    /**\n     * @notice Get the number of tokens held by the `account`\n     * @param account The address of the account to get the balance of\n     * @return The number of tokens held\n     */\n    function balanceOf(address account) external view returns (uint) {\n        return balances[account];\n    }\n\n    /**\n     * @notice Transfer `amount` tokens from `msg.sender` to `dst`\n     * @param dst The address of the destination account\n     * @param rawAmount The number of tokens to transfer\n     * @return Whether or not the transfer succeeded\n     */\n    function transfer(address dst, uint rawAmount) external validLock returns (bool) {\n        uint96 amount = safe96(rawAmount, \"XVS::transfer: amount exceeds 96 bits\");\n        _transferTokens(msg.sender, dst, amount);\n        return true;\n    }\n\n    /**\n     * @notice Transfer `amount` tokens from `src` to `dst`\n     * @param src The address of the source account\n     * @param dst The address of the destination account\n     * @param rawAmount The number of tokens to transfer\n     * @return Whether or not the transfer succeeded\n     */\n    function transferFrom(address src, address dst, uint rawAmount) external validLock returns (bool) {\n        address spender = msg.sender;\n        uint96 spenderAllowance = allowances[src][spender];\n        uint96 amount = safe96(rawAmount, \"XVS::approve: amount exceeds 96 bits\");\n\n        if (spender != src && spenderAllowance != uint96(-1)) {\n            uint96 newAllowance = sub96(\n                spenderAllowance,\n                amount,\n                \"XVS::transferFrom: transfer amount exceeds spender allowance\"\n            );\n            allowances[src][spender] = newAllowance;\n\n            emit Approval(src, spender, newAllowance);\n        }\n\n        _transferTokens(src, dst, amount);\n        return true;\n    }\n\n    /**\n     * @notice Delegate votes from `msg.sender` to `delegatee`\n     * @param delegatee The address to delegate votes to\n     */\n    function delegate(address delegatee) public validLock {\n        return _delegate(msg.sender, delegatee);\n    }\n\n    /**\n     * @notice Delegates votes from signatory to `delegatee`\n     * @param delegatee The address to delegate votes to\n     * @param nonce The contract state required to match the signature\n     * @param expiry The time at which to expire the signature\n     * @param v The recovery byte of the signature\n     * @param r Half of the ECDSA signature pair\n     * @param s Half of the ECDSA signature pair\n     */\n    function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public validLock {\n        bytes32 domainSeparator = keccak256(\n            abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))\n        );\n        bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry));\n        bytes32 digest = keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n        address signatory = ecrecover(digest, v, r, s);\n        require(signatory != address(0), \"XVS::delegateBySig: invalid signature\");\n        require(nonce == nonces[signatory]++, \"XVS::delegateBySig: invalid nonce\");\n        require(now <= expiry, \"XVS::delegateBySig: signature expired\");\n        return _delegate(signatory, delegatee);\n    }\n\n    /**\n     * @notice Gets the current votes balance for `account`\n     * @param account The address to get votes balance\n     * @return The number of current votes for `account`\n     */\n    function getCurrentVotes(address account) external view returns (uint96) {\n        uint32 nCheckpoints = numCheckpoints[account];\n        return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;\n    }\n\n    /**\n     * @notice Determine the prior number of votes for an account as of a block number\n     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.\n     * @param account The address of the account to check\n     * @param blockNumber The block number to get the vote balance at\n     * @return The number of votes the account had as of the given block\n     */\n    function getPriorVotes(address account, uint blockNumber) public view returns (uint96) {\n        require(blockNumber < block.number, \"XVS::getPriorVotes: not yet determined\");\n\n        uint32 nCheckpoints = numCheckpoints[account];\n        if (nCheckpoints == 0) {\n            return 0;\n        }\n\n        // First check most recent balance\n        if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {\n            return checkpoints[account][nCheckpoints - 1].votes;\n        }\n\n        // Next check implicit zero balance\n        if (checkpoints[account][0].fromBlock > blockNumber) {\n            return 0;\n        }\n\n        uint32 lower = 0;\n        uint32 upper = nCheckpoints - 1;\n        while (upper > lower) {\n            uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow\n            Checkpoint memory cp = checkpoints[account][center];\n            if (cp.fromBlock == blockNumber) {\n                return cp.votes;\n            } else if (cp.fromBlock < blockNumber) {\n                lower = center;\n            } else {\n                upper = center - 1;\n            }\n        }\n        return checkpoints[account][lower].votes;\n    }\n\n    function _delegate(address delegator, address delegatee) internal {\n        address currentDelegate = delegates[delegator];\n        uint96 delegatorBalance = balances[delegator];\n        delegates[delegator] = delegatee;\n\n        emit DelegateChanged(delegator, currentDelegate, delegatee);\n\n        _moveDelegates(currentDelegate, delegatee, delegatorBalance);\n    }\n\n    function _transferTokens(address src, address dst, uint96 amount) internal {\n        require(src != address(0), \"XVS::_transferTokens: cannot transfer from the zero address\");\n        require(dst != address(0), \"XVS::_transferTokens: cannot transfer to the zero address\");\n\n        balances[src] = sub96(balances[src], amount, \"XVS::_transferTokens: transfer amount exceeds balance\");\n        balances[dst] = add96(balances[dst], amount, \"XVS::_transferTokens: transfer amount overflows\");\n        emit Transfer(src, dst, amount);\n\n        _moveDelegates(delegates[src], delegates[dst], amount);\n    }\n\n    function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal {\n        if (srcRep != dstRep && amount > 0) {\n            if (srcRep != address(0)) {\n                uint32 srcRepNum = numCheckpoints[srcRep];\n                uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;\n                uint96 srcRepNew = sub96(srcRepOld, amount, \"XVS::_moveVotes: vote amount underflows\");\n                _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);\n            }\n\n            if (dstRep != address(0)) {\n                uint32 dstRepNum = numCheckpoints[dstRep];\n                uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;\n                uint96 dstRepNew = add96(dstRepOld, amount, \"XVS::_moveVotes: vote amount overflows\");\n                _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);\n            }\n        }\n    }\n\n    function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal {\n        uint32 blockNumber = safe32(block.number, \"XVS::_writeCheckpoint: block number exceeds 32 bits\");\n\n        if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {\n            checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;\n        } else {\n            checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);\n            numCheckpoints[delegatee] = nCheckpoints + 1;\n        }\n\n        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);\n    }\n\n    function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {\n        require(n < 2 ** 32, errorMessage);\n        return uint32(n);\n    }\n\n    function safe96(uint n, string memory errorMessage) internal pure returns (uint96) {\n        require(n < 2 ** 96, errorMessage);\n        return uint96(n);\n    }\n\n    function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) {\n        uint96 c = a + b;\n        require(c >= a, errorMessage);\n        return c;\n    }\n\n    function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) {\n        require(b <= a, errorMessage);\n        return a - b;\n    }\n\n    function getChainId() internal pure returns (uint) {\n        uint256 chainId;\n        assembly {\n            chainId := chainid()\n        }\n        return chainId;\n    }\n}\n"},"@venusprotocol/venus-protocol/contracts/Utils/Owned.sol":{"content":"pragma solidity ^0.5.16;\n\ncontract Owned {\n    address public owner;\n\n    event OwnershipTransferred(address indexed _from, address indexed _to);\n\n    constructor() public {\n        owner = msg.sender;\n    }\n\n    modifier onlyOwner() {\n        require(msg.sender == owner, \"Should be owner\");\n        _;\n    }\n\n    function transferOwnership(address newOwner) public onlyOwner {\n        owner = newOwner;\n        emit OwnershipTransferred(owner, newOwner);\n    }\n}\n"},"@venusprotocol/venus-protocol/contracts/Utils/Tokenlock.sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"./Owned.sol\";\n\ncontract Tokenlock is Owned {\n    /// @notice Indicates if token is locked\n    uint8 internal isLocked = 0;\n\n    event Freezed();\n    event UnFreezed();\n\n    modifier validLock() {\n        require(isLocked == 0, \"Token is locked\");\n        _;\n    }\n\n    function freeze() public onlyOwner {\n        isLocked = 1;\n\n        emit Freezed();\n    }\n\n    function unfreeze() public onlyOwner {\n        isLocked = 0;\n\n        emit UnFreezed();\n    }\n}\n"},"contracts/hardhat-dependency-compiler/@venusprotocol/venus-protocol/contracts/Tokens/XVS/XVS.sol":{"content":"// SPDX-License-Identifier: UNLICENSED\npragma solidity >0.0.0;\nimport '@venusprotocol/venus-protocol/contracts/Tokens/XVS/XVS.sol';\n"}},"settings":{"optimizer":{"enabled":true,"runs":200},"outputSelection":{"*":{"*":["storageLayout","abi","evm.bytecode","evm.deployedBytecode","evm.methodIdentifiers","metadata","devdoc","userdoc","evm.gasEstimates"],"":["ast"]}},"metadata":{"useLiteralContent":true}}},"output":{"sources":{"@venusprotocol/venus-protocol/contracts/Tokens/XVS/XVS.sol":{"ast":{"absolutePath":"@venusprotocol/venus-protocol/contracts/Tokens/XVS/XVS.sol","exportedSymbols":{"XVS":[969]},"id":970,"nodeType":"SourceUnit","nodes":[{"id":1,"literals":["solidity","^","0.5",".16"],"nodeType":"PragmaDirective","src":"0:24:0"},{"absolutePath":"@venusprotocol/venus-protocol/contracts/Utils/Tokenlock.sol","file":"../../Utils/Tokenlock.sol","id":2,"nodeType":"ImportDirective","scope":970,"sourceUnit":1069,"src":"26:35:0","symbolAliases":[],"unitAlias":""},{"baseContracts":[{"arguments":null,"baseName":{"contractScope":null,"id":3,"name":"Tokenlock","nodeType":"UserDefinedTypeName","referencedDeclaration":1068,"src":"79:9:0","typeDescriptions":{"typeIdentifier":"t_contract$_Tokenlock_$1068","typeString":"contract 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