be5ed7364b
* Now compiling in a separate directory using truffle 5. * Ported to 0.5.1, now compiling using 0.5.1. * test now also compiles using the truffle 5 hack. * Downgraded to 0.5.0. * Sorted scripts. * Cleaned up the compile script a bit.
41 lines
951 B
Solidity
41 lines
951 B
Solidity
pragma solidity ^0.5.0;
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/**
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* @title Roles
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* @dev Library for managing addresses assigned to a Role.
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*/
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library Roles {
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struct Role {
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mapping (address => bool) bearer;
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}
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/**
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* @dev give an account access to this role
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*/
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function add(Role storage role, address account) internal {
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require(account != address(0));
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require(!has(role, account));
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role.bearer[account] = true;
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}
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/**
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* @dev remove an account's access to this role
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*/
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function remove(Role storage role, address account) internal {
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require(account != address(0));
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require(has(role, account));
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role.bearer[account] = false;
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}
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/**
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* @dev check if an account has this role
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* @return bool
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*/
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function has(Role storage role, address account) internal view returns (bool) {
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require(account != address(0));
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return role.bearer[account];
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}
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}
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