Rename WhitelisterRole to WhitelistAdminRole. (#1589)

* Rename WhitelisterRole to WhitelistAdminRole.

* Update WhitelistAdmin changelog entry.

Author: nventuro

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 ### New features:
  * Now targeting the 0.5.x line of Solidity compilers. For 0.4.24 support, use version 2.0 of OpenZeppelin.
- * `WhitelistCrowdsale`: a crowdsale where only whitelisted accounts (`WhitelistedRole`) can purchase tokens. Adding or removing accounts from the whitelist is done by whitelisters (`WhitelisterRole`). Similar to the pre-2.0 `WhitelistedCrowdsale`. ([#1525](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1525))
+ * `WhitelistCrowdsale`: a crowdsale where only whitelisted accounts (`WhitelistedRole`) can purchase tokens. Adding or removing accounts from the whitelist is done by whitelist admins (`WhitelistAdminRole`). Similar to the pre-2.0 `WhitelistedCrowdsale`. ([#1525](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1525), [#1589](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1589))
  * `RefundablePostDeliveryCrowdsale`: replacement for `RefundableCrowdsale` (deprecated, see below) where tokens are only granted once the crowdsale ends (if it meets its goal). ([#1543](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1543))
  * `PausableCrowdsale`: allows for pausers (`PauserRole`) to pause token purchases. Other crowdsale operations (e.g. withdrawals and refunds, if applicable) are not affected. ([#832](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/832))
  * `ERC20`: `transferFrom` and `_burnFrom ` now emit `Approval` events, to represent the token's state comprehensively through events. ([#1524](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1524))

contracts/access/roles/WhitelistAdminRole.sol

@@ -0,0 +1,47 @@
+pragma solidity ^0.5.0;
+
+import "../Roles.sol";
+
+/**
+ * @title WhitelistAdminRole
+ * @dev WhitelistAdmins are responsible for assigning and removing Whitelisted accounts.
+ */
+contract WhitelistAdminRole {
+    using Roles for Roles.Role;
+
+    event WhitelistAdminAdded(address indexed account);
+    event WhitelistAdminRemoved(address indexed account);
+
+    Roles.Role private _whitelistAdmins;
+
+    constructor () internal {
+        _addWhitelistAdmin(msg.sender);
+    }
+
+    modifier onlyWhitelistAdmin() {
+        require(isWhitelistAdmin(msg.sender));
+        _;
+    }
+
+    function isWhitelistAdmin(address account) public view returns (bool) {
+        return _whitelistAdmins.has(account);
+    }
+
+    function addWhitelistAdmin(address account) public onlyWhitelistAdmin {
+        _addWhitelistAdmin(account);
+    }
+
+    function renounceWhitelistAdmin() public {
+        _removeWhitelistAdmin(msg.sender);
+    }
+
+    function _addWhitelistAdmin(address account) internal {
+        _whitelistAdmins.add(account);
+        emit WhitelistAdminAdded(account);
+    }
+
+    function _removeWhitelistAdmin(address account) internal {
+        _whitelistAdmins.remove(account);
+        emit WhitelistAdminRemoved(account);
+    }
+}

contracts/access/roles/WhitelistedRole.sol

@@ -1,15 +1,15 @@
 pragma solidity ^0.5.0;
 
 import "../Roles.sol";
-import "./WhitelisterRole.sol";
+import "./WhitelistAdminRole.sol";
 
 /**
  * @title WhitelistedRole
- * @dev Whitelisted accounts have been approved by a Whitelister to perform certain actions (e.g. participate in a
- * crowdsale). This role is special in that the only accounts that can add it are Whitelisters (who can also remove it),
- * and not Whitelisteds themselves.
+ * @dev Whitelisted accounts have been approved by a WhitelistAdmin to perform certain actions (e.g. participate in a
+ * crowdsale). This role is special in that the only accounts that can add it are WhitelistAdmins (who can also remove
+ * it), and not Whitelisteds themselves.
  */
-contract WhitelistedRole is WhitelisterRole {
+contract WhitelistedRole is WhitelistAdminRole {
     using Roles for Roles.Role;
 
     event WhitelistedAdded(address indexed account);
@@ -26,11 +26,11 @@ contract WhitelistedRole is WhitelisterRole {
         return _whitelisteds.has(account);
     }
 
-    function addWhitelisted(address account) public onlyWhitelister {
+    function addWhitelisted(address account) public onlyWhitelistAdmin {
         _addWhitelisted(account);
     }
 
-    function removeWhitelisted(address account) public onlyWhitelister {
+    function removeWhitelisted(address account) public onlyWhitelistAdmin {
         _removeWhitelisted(account);
     }
 

contracts/access/roles/WhitelisterRole.sol

@@ -0,0 +1,17 @@
+pragma solidity ^0.5.0;
+
+import "../access/roles/WhitelistAdminRole.sol";
+
+contract WhitelistAdminRoleMock is WhitelistAdminRole {
+    function removeWhitelistAdmin(address account) public {
+        _removeWhitelistAdmin(account);
+    }
+
+    function onlyWhitelistAdminMock() public view onlyWhitelistAdmin {
+    }
+
+    // Causes a compilation error if super._removeWhitelistAdmin is not internal
+    function _removeWhitelistAdmin(address account) internal {
+        super._removeWhitelistAdmin(account);
+    }
+}

contracts/mocks/WhitelistAdminRoleMock.sol

@@ -0,0 +1,11 @@
+const { shouldBehaveLikePublicRole } = require('../../access/roles/PublicRole.behavior');
+const WhitelistAdminRoleMock = artifacts.require('WhitelistAdminRoleMock');
+
+contract('WhitelistAdminRole', function ([_, whitelistAdmin, otherWhitelistAdmin, ...otherAccounts]) {
+  beforeEach(async function () {
+    this.contract = await WhitelistAdminRoleMock.new({ from: whitelistAdmin });
+    await this.contract.addWhitelistAdmin(otherWhitelistAdmin, { from: whitelistAdmin });
+  });
+
+  shouldBehaveLikePublicRole(whitelistAdmin, otherWhitelistAdmin, otherAccounts, 'whitelistAdmin');
+});

contracts/mocks/WhitelisterRoleMock.sol

@@ -1,12 +1,12 @@
 const { shouldBehaveLikePublicRole } = require('../../access/roles/PublicRole.behavior');
 const WhitelistedRoleMock = artifacts.require('WhitelistedRoleMock');
 
-contract('WhitelistedRole', function ([_, whitelisted, otherWhitelisted, whitelister, ...otherAccounts]) {
+contract('WhitelistedRole', function ([_, whitelisted, otherWhitelisted, whitelistAdmin, ...otherAccounts]) {
   beforeEach(async function () {
-    this.contract = await WhitelistedRoleMock.new({ from: whitelister });
-    await this.contract.addWhitelisted(whitelisted, { from: whitelister });
-    await this.contract.addWhitelisted(otherWhitelisted, { from: whitelister });
+    this.contract = await WhitelistedRoleMock.new({ from: whitelistAdmin });
+    await this.contract.addWhitelisted(whitelisted, { from: whitelistAdmin });
+    await this.contract.addWhitelisted(otherWhitelisted, { from: whitelistAdmin });
   });
 
-  shouldBehaveLikePublicRole(whitelisted, otherWhitelisted, otherAccounts, 'whitelisted', whitelister);
+  shouldBehaveLikePublicRole(whitelisted, otherWhitelisted, otherAccounts, 'whitelisted', whitelistAdmin);
 });