Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- AddressUpdater
- Optimization enabled
- true
- Compiler version
- v0.7.6+commit.7338295f
- Optimization runs
- 200
- Verified at
- 2022-07-13T21:11:16.243791Z
Constructor Arguments
0000000000000000000000004598a6c05910ab914f0cbaaca1911cd337d10d29
Arg [0] (address) : 0x4598a6c05910ab914f0cbaaca1911cd337d10d29
./contracts/addressUpdater/implementation/AddressUpdater.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
pragma abicoder v2;
import "../../governance/implementation/Governed.sol";
import "../interface/IIAddressUpdatable.sol";
contract AddressUpdater is Governed {
string internal constant ERR_ARRAY_LENGTHS = "array lengths do not match";
string internal constant ERR_ADDRESS_ZERO = "address zero";
string[] internal contractNames;
mapping(bytes32 => address) internal contractAddresses;
constructor(address _governance) Governed(_governance) {}
/**
* @notice set/update contract names/addresses and then apply changes to other contracts
* @param _contractNames contracts names
* @param _contractAddresses addresses of corresponding contracts names
* @param _contractsToUpdate contracts to be updated
*/
function update(
string[] memory _contractNames,
address[] memory _contractAddresses,
IIAddressUpdatable[] memory _contractsToUpdate
)
external onlyGovernance
{
_addOrUpdateContractNamesAndAddresses(_contractNames, _contractAddresses);
_updateContractAddresses(_contractsToUpdate);
}
/**
* @notice Updates contract addresses on all contracts implementing IIAddressUpdatable interface
* @param _contractsToUpdate contracts to be updated
*/
function updateContractAddresses(IIAddressUpdatable[] memory _contractsToUpdate)
external
onlyImmediateGovernance
{
_updateContractAddresses(_contractsToUpdate);
}
/**
* @notice Add or update contract names and addreses that are later used in updateContractAddresses calls
* @param _contractNames contracts names
* @param _contractAddresses addresses of corresponding contracts names
*/
function addOrUpdateContractNamesAndAddresses(
string[] memory _contractNames,
address[] memory _contractAddresses
)
external
onlyGovernance
{
_addOrUpdateContractNamesAndAddresses(_contractNames, _contractAddresses);
}
/**
* @notice Returns the contract names and the corresponding addresses
*/
function getContractNamesAndAddresses() external view returns(
string[] memory _contractNames,
address[] memory _contractAddresses
) {
_contractNames = contractNames;
uint256 len = _contractNames.length;
_contractAddresses = new address[](len);
while (len > 0) {
len--;
_contractAddresses[len] = contractAddresses[_keccak256AbiEncode(_contractNames[len])];
}
}
/**
* @notice Returns contract address for the given name and reverts if address(0)
*/
function getContractAddress(string memory _name) external view returns(address) {
address a = contractAddresses[_keccak256AbiEncode(_name)];
require(a != address(0), ERR_ADDRESS_ZERO);
return a;
}
/**
* @notice Add or update contract names and addreses that are later used in updateContractAddresses calls
* @param _contractNames contracts names
* @param _contractAddresses addresses of corresponding contracts names
*/
function _addOrUpdateContractNamesAndAddresses(
string[] memory _contractNames,
address[] memory _contractAddresses
)
internal
{
uint256 len = _contractNames.length;
require(len == _contractAddresses.length, ERR_ARRAY_LENGTHS);
for (uint256 i = 0; i < len; i++) {
require(_contractAddresses[i] != address(0), ERR_ADDRESS_ZERO);
bytes32 nameHash = _keccak256AbiEncode(_contractNames[i]);
// add new contract name if address is not known yet
if (contractAddresses[nameHash] == address(0)) {
contractNames.push(_contractNames[i]);
}
// set or update contract address
contractAddresses[nameHash] = _contractAddresses[i];
}
}
/**
* @notice Updates contract addresses on all contracts implementing IIAddressUpdatable interface
* @param _contractsToUpdate contracts to be updated
*/
function _updateContractAddresses(IIAddressUpdatable[] memory _contractsToUpdate) internal {
uint256 len = contractNames.length;
bytes32[] memory nameHashes = new bytes32[](len);
address[] memory addresses = new address[](len);
while (len > 0) {
len--;
nameHashes[len] = _keccak256AbiEncode(contractNames[len]);
addresses[len] = contractAddresses[nameHashes[len]];
}
for (uint256 i = 0; i < _contractsToUpdate.length; i++) {
_contractsToUpdate[i].updateContractAddresses(nameHashes, addresses);
}
}
/**
* @notice Returns hash from string value
*/
function _keccak256AbiEncode(string memory _value) internal pure returns(bytes32) {
return keccak256(abi.encode(_value));
}
}
./contracts/addressUpdater/interface/IIAddressUpdatable.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.7.6 <0.9;
interface IIAddressUpdatable {
/**
* @notice Updates contract addresses - should be called only from AddressUpdater contract
* @param _contractNameHashes list of keccak256(abi.encode(...)) contract names
* @param _contractAddresses list of contract addresses corresponding to the contract names
*/
function updateContractAddresses(
bytes32[] memory _contractNameHashes,
address[] memory _contractAddresses
) external;
}
./contracts/governance/implementation/Governed.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import { GovernedBase } from "./GovernedBase.sol";
/**
* @title Governed
* @dev For deployed, governed contracts, enforce a non-zero address at create time.
**/
contract Governed is GovernedBase {
constructor(address _governance) GovernedBase(_governance) {
require(_governance != address(0), "_governance zero");
}
}
./contracts/governance/implementation/GovernedBase.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "../../userInterfaces/IGovernanceSettings.sol";
/**
* @title Governed Base
* @notice This abstract base class defines behaviors for a governed contract.
* @dev This class is abstract so that specific behaviors can be defined for the constructor.
* Contracts should not be left ungoverned, but not all contract will have a constructor
* (for example those pre-defined in genesis).
**/
abstract contract GovernedBase {
struct TimelockedCall {
uint256 allowedAfterTimestamp;
bytes encodedCall;
}
// solhint-disable-next-line const-name-snakecase
IGovernanceSettings public constant governanceSettings =
IGovernanceSettings(0x1000000000000000000000000000000000000007);
address private initialGovernance;
bool private initialised;
bool public productionMode;
bool private executing;
mapping(bytes4 => TimelockedCall) public timelockedCalls;
event GovernanceCallTimelocked(bytes4 selector, uint256 allowedAfterTimestamp, bytes encodedCall);
event TimelockedGovernanceCallExecuted(bytes4 selector, uint256 timestamp);
event TimelockedGovernanceCallCanceled(bytes4 selector, uint256 timestamp);
event GovernanceInitialised(address initialGovernance);
event GovernedProductionModeEntered(address governanceSettings);
modifier onlyGovernance {
if (executing || !productionMode) {
_beforeExecute();
_;
} else {
_recordTimelockedCall(msg.data);
}
}
modifier onlyImmediateGovernance () {
_checkOnlyGovernance();
_;
}
constructor(address _initialGovernance) {
if (_initialGovernance != address(0)) {
initialise(_initialGovernance);
}
}
/**
* @notice Execute the timelocked governance calls once the timelock period expires.
* @dev Only executor can call this method.
* @param _selector The method selector (only one timelocked call per method is stored).
*/
function executeGovernanceCall(bytes4 _selector) external {
require(governanceSettings.isExecutor(msg.sender), "only executor");
TimelockedCall storage call = timelockedCalls[_selector];
require(call.allowedAfterTimestamp != 0, "timelock: invalid selector");
require(block.timestamp >= call.allowedAfterTimestamp, "timelock: not allowed yet");
bytes memory encodedCall = call.encodedCall;
delete timelockedCalls[_selector];
executing = true;
//solhint-disable-next-line avoid-low-level-calls
(bool success,) = address(this).call(encodedCall);
executing = false;
emit TimelockedGovernanceCallExecuted(_selector, block.timestamp);
_passReturnOrRevert(success);
}
/**
* Cancel a timelocked governance call before it has been executed.
* @dev Only governance can call this method.
* @param _selector The method selector.
*/
function cancelGovernanceCall(bytes4 _selector) external onlyImmediateGovernance {
require(timelockedCalls[_selector].allowedAfterTimestamp != 0, "timelock: invalid selector");
emit TimelockedGovernanceCallCanceled(_selector, block.timestamp);
delete timelockedCalls[_selector];
}
/**
* Enter the production mode after all the initial governance settings have been set.
* This enables timelocks and the governance is afterwards obtained by calling
* governanceSettings.getGovernanceAddress().
*/
function switchToProductionMode() external {
_checkOnlyGovernance();
require(!productionMode, "already in production mode");
initialGovernance = address(0);
productionMode = true;
emit GovernedProductionModeEntered(address(governanceSettings));
}
/**
* @notice Initialize the governance address if not first initialized.
*/
function initialise(address _initialGovernance) public virtual {
require(initialised == false, "initialised != false");
initialised = true;
initialGovernance = _initialGovernance;
emit GovernanceInitialised(_initialGovernance);
}
/**
* Returns the current effective governance address.
*/
function governance() public view returns (address) {
return productionMode ? governanceSettings.getGovernanceAddress() : initialGovernance;
}
function _beforeExecute() private {
if (executing) {
// can only be run from executeGovernanceCall(), where we check that only executor can call
// make sure nothing else gets executed, even in case of reentrancy
assert(msg.sender == address(this));
executing = false;
} else {
// must be called with: productionMode=false
// must check governance in this case
_checkOnlyGovernance();
}
}
function _recordTimelockedCall(bytes calldata _data) private {
_checkOnlyGovernance();
bytes4 selector;
//solhint-disable-next-line no-inline-assembly
assembly {
selector := calldataload(_data.offset)
}
uint256 timelock = governanceSettings.getTimelock();
uint256 allowedAt = block.timestamp + timelock;
timelockedCalls[selector] = TimelockedCall({
allowedAfterTimestamp: allowedAt,
encodedCall: _data
});
emit GovernanceCallTimelocked(selector, allowedAt, _data);
}
function _checkOnlyGovernance() private view {
require(msg.sender == governance(), "only governance");
}
function _passReturnOrRevert(bool _success) private pure {
// pass exact return or revert data - needs to be done in assembly
//solhint-disable-next-line no-inline-assembly
assembly {
let size := returndatasize()
let ptr := mload(0x40)
mstore(0x40, add(ptr, size))
returndatacopy(ptr, 0, size)
if _success {
return(ptr, size)
}
revert(ptr, size)
}
}
}
./contracts/userInterfaces/IGovernanceSettings.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
/**
* A special contract that holds Flare governance address.
* This contract enables updating governance address and timelock only by hard forking the network,
* meaning only by updating validator code.
*/
interface IGovernanceSettings {
/**
* Get the governance account address.
* The governance address can only be changed by a hardfork.
*/
function getGovernanceAddress() external view returns (address);
/**
* Get the time in seconds that must pass between a governance call and execution.
* The timelock value can only be changed by a hardfork.
*/
function getTimelock() external view returns (uint256);
/**
* Get the addresses of the accounts that are allowed to execute the timelocked governance calls
* once the timelock period expires.
* Executors can be changed without a hardfork, via a normal governance call.
*/
function getExecutors() external view returns (address[] memory);
/**
* Check whether an address is one of the executors.
*/
function isExecutor(address _address) external view returns (bool);
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_governance","internalType":"address"}]},{"type":"event","name":"GovernanceCallTimelocked","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4","indexed":false},{"type":"uint256","name":"allowedAfterTimestamp","internalType":"uint256","indexed":false},{"type":"bytes","name":"encodedCall","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"event","name":"GovernanceInitialised","inputs":[{"type":"address","name":"initialGovernance","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"GovernedProductionModeEntered","inputs":[{"type":"address","name":"governanceSettings","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"TimelockedGovernanceCallCanceled","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4","indexed":false},{"type":"uint256","name":"timestamp","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"TimelockedGovernanceCallExecuted","inputs":[{"type":"bytes4","name":"selector","internalType":"bytes4","indexed":false},{"type":"uint256","name":"timestamp","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addOrUpdateContractNamesAndAddresses","inputs":[{"type":"string[]","name":"_contractNames","internalType":"string[]"},{"type":"address[]","name":"_contractAddresses","internalType":"address[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"cancelGovernanceCall","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"executeGovernanceCall","inputs":[{"type":"bytes4","name":"_selector","internalType":"bytes4"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"getContractAddress","inputs":[{"type":"string","name":"_name","internalType":"string"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"string[]","name":"_contractNames","internalType":"string[]"},{"type":"address[]","name":"_contractAddresses","internalType":"address[]"}],"name":"getContractNamesAndAddresses","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"governance","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IGovernanceSettings"}],"name":"governanceSettings","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialise","inputs":[{"type":"address","name":"_initialGovernance","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"productionMode","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"switchToProductionMode","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"allowedAfterTimestamp","internalType":"uint256"},{"type":"bytes","name":"encodedCall","internalType":"bytes"}],"name":"timelockedCalls","inputs":[{"type":"bytes4","name":"","internalType":"bytes4"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"update","inputs":[{"type":"string[]","name":"_contractNames","internalType":"string[]"},{"type":"address[]","name":"_contractAddresses","internalType":"address[]"},{"type":"address[]","name":"_contractsToUpdate","internalType":"contract IIAddressUpdatable[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updateContractAddresses","inputs":[{"type":"address[]","name":"_contractsToUpdate","internalType":"contract IIAddressUpdatable[]"}]}]
Contract Creation Code
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