Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- RealitioHomeArbitrationProxy
- Optimization enabled
- true
- Compiler version
- v0.7.4+commit.3f05b770
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2020-12-15T13:29:34.760811Z
Constructor Arguments
000000000000000000000000fe446bef1dbf7afe24e81e05bc8b271c1ba9a56000000000000000000000000063975d9e7cf434dcd04bd808d8c79d03ef69100b
Arg [0] (address) : 0xfe446bef1dbf7afe24e81e05bc8b271c1ba9a560
Arg [1] (address) : 0x63975d9e7cf434dcd04bd808d8c79d03ef69100b
Contract source code
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.2;
interface IHomeArbitrationProxy {
/**
* @dev Receives the requested arbitration for a question. TRUSTED.
* @param _questionID The ID of the question.
* @param _contestedAnswer The answer the requester deems to be incorrect.
* @param _requester The address of the user that requested arbitration.
*/
function receiveArbitrationRequest(
bytes32 _questionID,
bytes32 _contestedAnswer,
address _requester
) external;
/**
* @dev Receives a failed attempt to request arbitration. TRUSTED.
* @param _questionID The ID of the question.
*/
function receiveArbitrationFailure(bytes32 _questionID) external;
/**
* @dev Receives the answer to a specified question. TRUSTED.
* @param _questionID The ID of the question.
* @param _answer The answer from the arbitrator.
*/
function receiveArbitrationAnswer(bytes32 _questionID, bytes32 _answer) external;
}
interface IForeignArbitrationProxy {
/**
* @dev Requests arbitration for given question ID. TRUSTED.
* @param _questionID The ID of the question.
*/
function acknowledgeArbitration(bytes32 _questionID) external;
/**
* @dev Cancels the arbitration request. TRUSTED.
* @param _questionID The ID of the question.
*/
function cancelArbitration(bytes32 _questionID) external;
/**
* @notice Gets the fee to create a dispute.
* @return The fee to create a dispute.
*/
function getDisputeFee(bytes32 questionID) external view returns (uint256);
}
interface IAMB {
function requireToPassMessage(
address _contract,
bytes memory _data,
uint256 _gas
) external returns (bytes32);
function maxGasPerTx() external view returns (uint256);
function messageSender() external view returns (address);
function messageSourceChainId() external view returns (bytes32);
function messageId() external view returns (bytes32);
}
/* solhint-disable var-name-mixedcase */
interface RealitioInterface {
event LogNewAnswer(
bytes32 answer,
bytes32 indexed question_id,
bytes32 history_hash,
address indexed user,
uint256 bond,
uint256 ts,
bool is_commitment
);
event LogNewTemplate(uint256 indexed template_id, address indexed user, string question_text);
event LogNewQuestion(
bytes32 indexed question_id,
address indexed user,
uint256 template_id,
string question,
bytes32 indexed content_hash,
address arbitrator,
uint32 timeout,
uint32 opening_ts,
uint256 nonce,
uint256 created
);
/**
* @dev The arbitrator contract is trusted to only call this if they've been paid, and tell us who paid them.
* @notice Notify the contract that the arbitrator has been paid for a question, freezing it pending their decision.
* @param question_id The ID of the question.
* @param requester The account that requested arbitration.
* @param max_previous If specified, reverts if a bond higher than this was submitted after you sent your transaction.
*/
function notifyOfArbitrationRequest(
bytes32 question_id,
address requester,
uint256 max_previous
) external;
/**
* @notice Cancel a previously-requested arbitration and extend the timeout
* @dev Useful when doing arbitration across chains that can't be requested atomically
* @param question_id The ID of the question
*/
function cancelArbitration(bytes32 question_id) external;
/**
* @notice Submit the answer for a question, for use by the arbitrator, working out the appropriate winner based on the last answer details.
* @dev Doesn't require (or allow) a bond.
* @param question_id The ID of the question
* @param answer The answer, encoded into bytes32
* @param payee_if_wrong The account to by credited as winner if the last answer given is wrong, usually the account that paid the arbitrator
* @param last_history_hash The history hash before the final one
* @param last_answer_or_commitment_id The last answer given, or the commitment ID if it was a commitment.
* @param last_answerer The address that supplied the last answer
*/
function assignWinnerAndSubmitAnswerByArbitrator(
bytes32 question_id,
bytes32 answer,
address payee_if_wrong,
bytes32 last_history_hash,
bytes32 last_answer_or_commitment_id,
address last_answerer
) external;
/**
* @notice Returns the current best answer.
* @param question_id The ID of the question.
* @return The current best answer.
*/
function getBestAnswer(bytes32 question_id) external view returns (bytes32);
}
contract RealitioHomeArbitrationProxy is IHomeArbitrationProxy {
/// @dev The contract governor. TRUSTED.
address public governor = msg.sender;
/// @dev The address of the Realitio contract (v2.1+ required). TRUSTED.
RealitioInterface public immutable realitio;
/// @dev ArbitraryMessageBridge contract address. TRUSTED.
IAMB public immutable amb;
/// @dev Address of the counter-party proxy on the Foreign Chain. TRUSTED.
address public foreignProxy;
/// @dev The chain ID where the foreign proxy is deployed.
uint256 public foreignChainId;
/// @dev Metadata for Realitio interface.
string public constant metadata = '{"foreignProxy":true}';
enum Status {None, Rejected, Notified, AwaitingRuling, Ruled}
struct Request {
Status status;
address requester;
bytes32 arbitratorAnswer;
}
/// @dev Associates an arbitration request with a question ID.
mapping(bytes32 => Request) public questionIDToRequest;
/**
* @notice To be emitted when arbitration request is rejected.
* @dev This can happen if the contested answer is different from the current best answer,
* if the notification of arbitration request fails or if the question is already finalized.
* @param _questionID The ID of the question.
* @param _contestedAnswer The answer the requester deems to be incorrect.
* @param _requester The address of the user that requested arbitration.
*/
event RequestRejected(bytes32 indexed _questionID, bytes32 _contestedAnswer, address indexed _requester);
/**
* @notice To be emitted when the Realitio contract has been notified of an arbitration request.
* @param _questionID The ID of the question.
* @param _contestedAnswer The answer the requester deems to be incorrect.
* @param _requester The address of the user that requested arbitration.
*/
event RequestNotified(bytes32 indexed _questionID, bytes32 _contestedAnswer, address indexed _requester);
/**
* @notice To be emitted when the arbitration request acknowledgement is sent to the Foreign Chain.
* @param _questionID The ID of the question.
*/
event RequestAcknowledged(bytes32 indexed _questionID);
/**
* @notice To be emitted when the arbitration request is canceled.
* @param _questionID The ID of the question.
*/
event RequestCanceled(bytes32 indexed _questionID);
/**
* @notice To be emitted when the dispute could not be created on the Foreign Chain.
* @dev This will happen if the arbitration fee increases in between the arbitration request and acknowledgement.
* @param _questionID The ID of the question.
*/
event ArbitrationFailed(bytes32 indexed _questionID);
/**
* @notice To be emitted when receiving the answer from the arbitrator.
* @param _questionID The ID of the question.
* @param _answer The answer from the arbitrator.
*/
event ArbitratorAnswered(bytes32 indexed _questionID, bytes32 _answer);
/**
* @notice To be emitted when reporting the arbitrator answer to Realitio.
* @param _questionID The ID of the question.
*/
event ArbitrationCompleted(bytes32 indexed _questionID);
modifier onlyGovernor() {
require(msg.sender == governor, "Only governor allowed");
_;
}
modifier onlyAmb() {
require(msg.sender == address(amb), "Only AMB allowed");
_;
}
modifier onlyForeignChain() {
require(amb.messageSourceChainId() == bytes32(foreignChainId), "Only foreign chain allowed");
_;
}
modifier onlyForeignProxy() {
require(amb.messageSender() == foreignProxy, "Only foreign proxy allowed");
_;
}
/**
* @notice Creates an arbitration proxy on the home chain.
* @param _amb ArbitraryMessageBridge contract address.
* @param _realitio Realitio contract address.
*/
constructor(IAMB _amb, RealitioInterface _realitio) {
amb = _amb;
realitio = _realitio;
}
/**
* @notice Sets the address of a new governor.
* @param _governor The address of the new governor.
*/
function setGovernor(address _governor) external onlyGovernor {
governor = _governor;
}
/**
* @notice Sets the address of the arbitration proxy on the Foreign Chain.
* @param _foreignProxy The address of the proxy.
* @param _foreignChainId The ID of the chain where the foreign proxy is deployed.
*/
function setForeignProxy(address _foreignProxy, uint256 _foreignChainId) external onlyGovernor {
require(foreignProxy == address(0), "Foreign proxy already set");
foreignProxy = _foreignProxy;
foreignChainId = _foreignChainId;
}
/**
* @notice Receives the requested arbitration for a question.
* @param _questionID The ID of the question.
* @param _contestedAnswer The answer the requester deems to be incorrect.
* @param _requester The address of the user that requested arbitration.
*/
function receiveArbitrationRequest(
bytes32 _questionID,
bytes32 _contestedAnswer,
address _requester
) external override onlyAmb onlyForeignChain onlyForeignProxy {
Request storage request = questionIDToRequest[_questionID];
require(request.status == Status.None, "Request already exists");
if (realitio.getBestAnswer(_questionID) == _contestedAnswer) {
try realitio.notifyOfArbitrationRequest(_questionID, _requester, 0) {
request.status = Status.Notified;
request.requester = _requester;
emit RequestNotified(_questionID, _contestedAnswer, _requester);
} catch {
request.status = Status.Rejected;
emit RequestRejected(_questionID, _contestedAnswer, _requester);
}
} else {
request.status = Status.Rejected;
emit RequestRejected(_questionID, _contestedAnswer, _requester);
}
}
/**
* @notice Sends the arbitration acknowledgement to the Foreign Chain.
* @dev Handles arbitration request after it has been notified to Realitio for a given question.
* @param _questionID The ID of the question.
*/
function handleNotifiedRequest(bytes32 _questionID) external {
Request storage request = questionIDToRequest[_questionID];
require(request.status == Status.Notified, "Invalid request status");
request.status = Status.AwaitingRuling;
bytes4 selector = IForeignArbitrationProxy(0).acknowledgeArbitration.selector;
bytes memory data = abi.encodeWithSelector(selector, _questionID);
amb.requireToPassMessage(foreignProxy, data, amb.maxGasPerTx());
emit RequestAcknowledged(_questionID);
}
/**
* @notice Sends the arbitration rejection to the Foreign Chain.
* @dev Handles arbitration request after it has been rejected due to the quesiton
* being finalized or the contested answer being different from the current one.
* @param _questionID The ID of the question.
*/
function handleRejectedRequest(bytes32 _questionID) external {
Request storage request = questionIDToRequest[_questionID];
require(request.status == Status.Rejected, "Invalid request status");
// At this point, only the request.status is set, simply reseting the status to Status.None is enough.
request.status = Status.None;
bytes4 selector = IForeignArbitrationProxy(0).cancelArbitration.selector;
bytes memory data = abi.encodeWithSelector(selector, _questionID);
amb.requireToPassMessage(foreignProxy, data, amb.maxGasPerTx());
emit RequestCanceled(_questionID);
}
/**
* @dev Receives a failed attempt to request arbitration.
* @param _questionID The ID of the question.
*/
function receiveArbitrationFailure(bytes32 _questionID)
external
override
onlyAmb
onlyForeignChain
onlyForeignProxy
{
Request storage request = questionIDToRequest[_questionID];
require(request.status == Status.AwaitingRuling, "Invalid request status");
delete questionIDToRequest[_questionID];
realitio.cancelArbitration(_questionID);
emit ArbitrationFailed(_questionID);
}
/**
* @dev Receives the answer to a specified question.
* @param _questionID The ID of the question.
* @param _answer The answer from the arbitratior.
*/
function receiveArbitrationAnswer(bytes32 _questionID, bytes32 _answer)
external
override
onlyAmb
onlyForeignChain
onlyForeignProxy
{
Request storage request = questionIDToRequest[_questionID];
require(request.status == Status.AwaitingRuling, "Invalid request status");
request.status = Status.Ruled;
request.arbitratorAnswer = _answer;
emit ArbitratorAnswered(_questionID, _answer);
}
/**
* @dev Report the answer provided by the arbitrator to a specified question.
* @param _questionID The ID of the question.
* @param _lastHistoryHash The history hash given with the last answer to the question in the Realitio contract.
* @param _lastAnswerOrCommitmentID The last answer given, or its commitment ID if it was a commitment, to the question in the Realitio contract.
* @param _lastAnswerer The last answerer to the question in the Realitio contract.
*/
function reportArbitrationAnswer(
bytes32 _questionID,
bytes32 _lastHistoryHash,
bytes32 _lastAnswerOrCommitmentID,
address _lastAnswerer
) external {
Request storage request = questionIDToRequest[_questionID];
require(request.status == Status.Ruled, "Arbitrator has not ruled yet");
realitio.assignWinnerAndSubmitAnswerByArbitrator(
_questionID,
request.arbitratorAnswer,
request.requester,
_lastHistoryHash,
_lastAnswerOrCommitmentID,
_lastAnswerer
);
delete questionIDToRequest[_questionID];
emit ArbitrationCompleted(_questionID);
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_amb","internalType":"contract IAMB"},{"type":"address","name":"_realitio","internalType":"contract RealitioInterface"}]},{"type":"event","name":"ArbitrationCompleted","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true}],"anonymous":false},{"type":"event","name":"ArbitrationFailed","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true}],"anonymous":false},{"type":"event","name":"ArbitratorAnswered","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true},{"type":"bytes32","name":"_answer","internalType":"bytes32","indexed":false}],"anonymous":false},{"type":"event","name":"RequestAcknowledged","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true}],"anonymous":false},{"type":"event","name":"RequestCanceled","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true}],"anonymous":false},{"type":"event","name":"RequestNotified","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true},{"type":"bytes32","name":"_contestedAnswer","internalType":"bytes32","indexed":false},{"type":"address","name":"_requester","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"RequestRejected","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32","indexed":true},{"type":"bytes32","name":"_contestedAnswer","internalType":"bytes32","indexed":false},{"type":"address","name":"_requester","internalType":"address","indexed":true}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IAMB"}],"name":"amb","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"foreignChainId","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"foreignProxy","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"governor","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"handleNotifiedRequest","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"handleRejectedRequest","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"metadata","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"status","internalType":"enum RealitioHomeArbitrationProxy.Status"},{"type":"address","name":"requester","internalType":"address"},{"type":"bytes32","name":"arbitratorAnswer","internalType":"bytes32"}],"name":"questionIDToRequest","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract RealitioInterface"}],"name":"realitio","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"receiveArbitrationAnswer","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32"},{"type":"bytes32","name":"_answer","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"receiveArbitrationFailure","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"receiveArbitrationRequest","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32"},{"type":"bytes32","name":"_contestedAnswer","internalType":"bytes32"},{"type":"address","name":"_requester","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"reportArbitrationAnswer","inputs":[{"type":"bytes32","name":"_questionID","internalType":"bytes32"},{"type":"bytes32","name":"_lastHistoryHash","internalType":"bytes32"},{"type":"bytes32","name":"_lastAnswerOrCommitmentID","internalType":"bytes32"},{"type":"address","name":"_lastAnswerer","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setForeignProxy","inputs":[{"type":"address","name":"_foreignProxy","internalType":"address"},{"type":"uint256","name":"_foreignChainId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setGovernor","inputs":[{"type":"address","name":"_governor","internalType":"address"}]}]
Contract Creation Code
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