30 lines
804 B
Solidity
30 lines
804 B
Solidity
|
//SPDX-License-Identifier: MIT
|
||
|
|
pragma solidity >= 0.5.0 < 0.7.0;
|
||
|
|
|
||
|
|
import "./vendor/Ownable.sol";
|
||
|
|
import "./OracleEmitter.sol";
|
||
|
|
|
||
|
|
contract Mediator is Ownable {
|
||
|
|
event DataReceived(
|
||
|
|
uint256 reqID,
|
||
|
|
string data
|
||
|
|
);
|
||
|
|
|
||
|
|
OracleEmitter oracleEmitter;
|
||
|
|
address aggregator;
|
||
|
|
|
||
|
|
constructor(address _oracleEmitter, address _aggregator) public Ownable() {
|
||
|
|
oracleEmitter = OracleEmitter(_oracleEmitter);
|
||
|
|
aggregator = _aggregator;
|
||
|
|
}
|
||
|
|
|
||
|
|
function request(string memory requestType) public returns (uint256) {
|
||
|
|
return oracleEmitter.requestOracles(requestType, address(this), bytes4(keccak256("_receiveDataCallback(uint256, string)")));
|
||
|
|
}
|
||
|
|
|
||
|
|
function _receiveDataCallback(uint256 reqID, string memory data) public {
|
||
|
|
require(msg.sender == aggregator);
|
||
|
|
emit DataReceived(reqID, data);
|
||
|
|
}
|
||
|
|
}
|