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//! The SimpleCertifier contract, used by service transaction.
//!
//! Copyright 2016 Gavin Wood, Parity Technologies Ltd.
//!
//! Licensed under the Apache License, Version 2.0 (the "License");
//! you may not use this file except in compliance with the License.
//! You may obtain a copy of the License at
//!
//! http://www.apache.org/licenses/LICENSE-2.0
//!
//! Unless required by applicable law or agreed to in writing, software
//! distributed under the License is distributed on an "AS IS" BASIS,
//! WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//! See the License for the specific language governing permissions and
//! limitations under the License.
pragma solidity ^0.4.24;
import "./Certifier.sol";
import "./Owned.sol";
contract SimpleCertifier is Owned, Certifier {
struct Certification {
bool active;
}
mapping (address => Certification) certs;
// So that the server posting puzzles doesn't have access to the ETH.
address public delegate = msg.sender;
modifier onlyDelegate {
require(msg.sender == delegate);
_;
}
modifier onlyCertified(address _who) {
require(certs[_who].active);
_;
}
function certify(address _who)
external
onlyDelegate
{
certs[_who].active = true;
emit Confirmed(_who);
}
function revoke(address _who)
external
onlyDelegate
onlyCertified(_who)
{
certs[_who].active = false;
emit Revoked(_who);
}
function setDelegate(address _new)
external
onlyOwner
{
delegate = _new;
}
function certified(address _who)
external
view
returns (bool)
{
return certs[_who].active;
}
}