Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
This contract has been partially verified via Sourcify.
View contract in Sourcify repository
- Contract name:
- SimpleWriteAccessController
- Optimization enabled
- true
- Compiler version
- v0.6.6+commit.6c089d02
- Optimization runs
- 1000000
- EVM Version
- istanbul
- Verified at
- 2026-04-26T23:59:09.113339Z
SimpleWriteAccessController.sol
pragma solidity ^0.6.0;
/**
* @title The Owned contract
* @notice A contract with helpers for basic contract ownership.
*/
contract Owned {
address public owner;
address private pendingOwner;
event OwnershipTransferRequested(
address indexed from,
address indexed to
);
event OwnershipTransferred(
address indexed from,
address indexed to
);
constructor() public {
owner = msg.sender;
}
/**
* @dev Allows an owner to begin transferring ownership to a new address,
* pending.
*/
function transferOwnership(address _to)
external
onlyOwner()
{
pendingOwner = _to;
emit OwnershipTransferRequested(owner, _to);
}
/**
* @dev Allows an ownership transfer to be completed by the recipient.
*/
function acceptOwnership()
external
{
require(msg.sender == pendingOwner, "Must be proposed owner");
address oldOwner = owner;
owner = msg.sender;
pendingOwner = address(0);
emit OwnershipTransferred(oldOwner, msg.sender);
}
/**
* @dev Reverts if called by anyone other than the contract owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "Only callable by owner");
_;
}
}
interface AccessControllerInterface {
function hasAccess(address user, bytes calldata data) external view returns (bool);
}
/**
* @title SimpleWriteAccessController
* @notice Gives access to accounts explicitly added to an access list by the
* controller's owner.
* @dev does not make any special permissions for externally, see
* SimpleReadAccessController for that.
*/
contract SimpleWriteAccessController is AccessControllerInterface, Owned {
bool public checkEnabled;
mapping(address => bool) internal accessList;
event AddedAccess(address user);
event RemovedAccess(address user);
event CheckAccessEnabled();
event CheckAccessDisabled();
constructor()
public
{
checkEnabled = true;
}
/**
* @notice Returns the access of an address
* @param _user The address to query
*/
function hasAccess(
address _user,
bytes memory
)
public
view
virtual
override
returns (bool)
{
return accessList[_user] || !checkEnabled;
}
/**
* @notice Adds an address to the access list
* @param _user The address to add
*/
function addAccess(address _user)
external
onlyOwner()
{
if (!accessList[_user]) {
accessList[_user] = true;
emit AddedAccess(_user);
}
}
/**
* @notice Removes an address from the access list
* @param _user The address to remove
*/
function removeAccess(address _user)
external
onlyOwner()
{
if (accessList[_user]) {
accessList[_user] = false;
emit RemovedAccess(_user);
}
}
/**
* @notice makes the access check enforced
*/
function enableAccessCheck()
external
onlyOwner()
{
if (!checkEnabled) {
checkEnabled = true;
emit CheckAccessEnabled();
}
}
/**
* @notice makes the access check unenforced
*/
function disableAccessCheck()
external
onlyOwner()
{
if (checkEnabled) {
checkEnabled = false;
emit CheckAccessDisabled();
}
}
/**
* @dev reverts if the caller does not have access
*/
modifier checkAccess() {
require(hasAccess(msg.sender, msg.data), "No access");
_;
}
}
Compiler Settings
{"remappings":[],"optimizer":{"runs":1000000,"enabled":true},"metadata":{"bytecodeHash":"ipfs"},"libraries":{},"evmVersion":"istanbul","compilationTarget":{"SimpleWriteAccessController.sol":"SimpleWriteAccessController"}}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[]},{"type":"event","name":"AddedAccess","inputs":[{"type":"address","name":"user","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"CheckAccessDisabled","inputs":[],"anonymous":false},{"type":"event","name":"CheckAccessEnabled","inputs":[],"anonymous":false},{"type":"event","name":"OwnershipTransferRequested","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"address","name":"to","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"address","name":"to","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"RemovedAccess","inputs":[{"type":"address","name":"user","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"acceptOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addAccess","inputs":[{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"checkEnabled","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"disableAccessCheck","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"enableAccessCheck","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"hasAccess","inputs":[{"type":"address","name":"_user","internalType":"address"},{"type":"bytes","name":"","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeAccess","inputs":[{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"_to","internalType":"address"}]}]
Contract Creation Code
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ByteCode
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