@daostack/access_control

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"source": "pragma solidity ^0.4.24;\n\n\n/**\n * @title Abstract base contract for all groups.\n */\ncontract Group {\n\n /**\n * @dev Check if an account belongs to this group.\n * @param _account the account to check.\n */\n function isMember(address _account) public view returns(bool);\n\n /**\n * @dev Modifier for restricting access to members of the group.\n */\n modifier onlyMember() {\n require(isMember(msg.sender), \"Not a member of this group\");\n _;\n }\n\n /**\n * @dev Call a method on a contract in the name of the group.\n * @param _contract contract address to call.\n * @param _data ABI encoded function call data.\n */\n function forward(address _contract, bytes _data) public payable onlyMember {\n // solium-disable-next-line security/no-low-level-calls\n bool result = _contract.call(_data);\n // solium-disable-next-line security/no-inline-assembly\n assembly {\n // Copy the returned data.\n returndatacopy(0, 0, returndatasize)\n\n switch result\n // call returns 0 on error.\n case 0 { revert(0, returndatasize) }\n default { return(0, returndatasize) }\n }\n }\n}\n\n\n/**\n * @title Group with fixed members set at creation time.\n */\ncontract FixedGroup is Group {\n mapping(address => bool) members;\n\n /**\n * @notice Can use up to 935 members (tested with 8M block gas limit)\n */\n constructor(address[] _members) public {\n for (uint i = 0; i < _members.length; i++) {\n members[_members[i]] = true;\n }\n }\n\n function isMember(address _account) public view returns(bool) {\n return members[_account];\n }\n}\n\n\n/**\n * @title Group that comprises of all members belonging to at least one subgroup.\n */\ncontract UnionGroup is Group {\n Group[] subgroups;\n\n /**\n * @notice Can use up to 294 sub-groups (tested with 8M block gas limit)\n */\n constructor(Group[] _subgroups) public {\n subgroups = _subgroups;\n }\n\n function isMember(address _account) public view returns(bool) {\n for (uint i = 0; i < subgroups.length; i++) {\n if (subgroups[i].isMember(_account)) {\n return true;\n }\n }\n return false;\n }\n}\n\n\n/**\n * @title Group that comprises of all members belonging to all subgroups.\n */\ncontract IntersectionGroup is Group {\n Group[] subgroups;\n\n /**\n * @notice Can use up to 294 sub-groups (tested with 8M block gas limit)\n */\n constructor(Group[] _subgroups) public {\n subgroups = _subgroups;\n }\n\n function isMember(address _account) public view returns(bool) {\n for (uint i = 0; i < subgroups.length; i++) {\n if (!subgroups[i].isMember(_account)) {\n return false;\n }\n }\n return true;\n }\n}\n\n\n/**\n * @title Group that comprises of all members not belonging to a group.\n */\ncontract InverseGroup is Group {\n Group group;\n\n constructor(Group _group) public {\n group = _group;\n }\n\n function isMember(address _account) public view returns(bool) {\n return !group.isMember(_account);\n }\n}\n", "sourcePath": "/home/tsuberim/projects/daostack/access_control/contracts/Groups.sol", "ast": 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