Address Contract Partially Verified
Address
0x2CD26a9AB2630C85D06C9a93338b35da173E4e30
Balance
0 ETH
Nonce
1
Code Size
9023 bytes
Creator
0x967958DB...308f at tx 0x39decf3d...5f38d9
Indexed Transactions
0
Contract Bytecode
9023 bytes
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Verified Source Code Partial Match
Compiler: v0.8.4+commit.c7e474f2
EVM: istanbul
Optimization: Yes (200 runs)
OKLGProduct.sol 54 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import '@openzeppelin/contracts/interfaces/IERC20.sol';
import './interfaces/IOKLGSpend.sol';
import './OKLGWithdrawable.sol';
/**
* @title OKLGProduct
* @dev Contract that every product developed in the OKLG ecosystem should implement
*/
contract OKLGProduct is OKLGWithdrawable {
IERC20 private _token; // OKLG
IOKLGSpend private _spend;
uint8 public productID;
constructor(
uint8 _productID,
address _tokenAddy,
address _spendAddy
) {
productID = _productID;
_token = IERC20(_tokenAddy);
_spend = IOKLGSpend(_spendAddy);
}
function setTokenAddy(address _tokenAddy) external onlyOwner {
_token = IERC20(_tokenAddy);
}
function setSpendAddy(address _spendAddy) external onlyOwner {
_spend = IOKLGSpend(_spendAddy);
}
function setProductID(uint8 _newId) external onlyOwner {
productID = _newId;
}
function getTokenAddress() public view returns (address) {
return address(_token);
}
function getSpendAddress() public view returns (address) {
return address(_spend);
}
function _payForService(uint256 _weiToRemoveFromSpend) internal {
_spend.spendOnProduct{ value: msg.value - _weiToRemoveFromSpend }(
msg.sender,
productID
);
}
}
OKLGWithdrawable.sol 25 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/interfaces/IERC20.sol';
/**
* @title OKLGWithdrawable
* @dev Supports being able to get tokens or ETH out of a contract with ease
*/
contract OKLGWithdrawable is Ownable {
function withdrawTokens(address _tokenAddy, uint256 _amount)
external
onlyOwner
{
IERC20 _token = IERC20(_tokenAddy);
_amount = _amount > 0 ? _amount : _token.balanceOf(address(this));
require(_amount > 0, 'make sure there is a balance available to withdraw');
_token.transfer(owner(), _amount);
}
function withdrawETH() external onlyOwner {
payable(owner()).call{ value: address(this).balance }('');
}
}
IOKLGSpend.sol 10 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/**
* @title IOKLGSpend
* @dev Logic for spending OKLG on products in the product ecosystem.
*/
interface IOKLGSpend {
function spendOnProduct(address _payor, uint8 _product) external payable;
}
OKLGAtomicSwapInstance.sol 275 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import '@openzeppelin/contracts/interfaces/IERC20.sol';
import './OKLGProduct.sol';
interface IERC20Decimals is IERC20 {
function decimals() external view returns (uint8);
}
/**
* @title OKLGAtomicSwapInstance
* @dev This is the main contract that supports holding metadata for OKLG atomic inter and intrachain swapping
*/
contract OKLGAtomicSwapInstance is OKLGProduct {
IERC20Decimals private _token;
address public tokenOwner;
address payable public oracleAddress;
uint256 public maxSwapAmount;
uint8 public targetTokenDecimals;
uint256 public minimumGasForOperation = 2 * 10**15; // 2 finney (0.002 ETH)
bool public isActive = true;
struct Swap {
bytes32 id;
uint256 origTimestamp;
uint256 currentTimestamp;
bool isOutbound;
bool isComplete;
bool isRefunded;
bool isRefundable;
bool isSendGasFunded;
address swapAddress;
uint256 amount;
}
mapping(bytes32 => Swap) public swaps;
mapping(address => Swap) public lastUserSwap;
event ReceiveTokensFromSource(
bytes32 indexed id,
uint256 origTimestamp,
address sender,
uint256 amount
);
event SendTokensToDestination(
bytes32 indexed id,
address receiver,
uint256 amount
);
event RefundTokensToSource(
bytes32 indexed id,
address sender,
uint256 amount
);
event TokenOwnerUpdated(address previousOwner, address newOwner);
constructor(
address _costToken,
address _spendAddress,
address _oracleAddress,
address _tokenOwner,
address _tokenAddy,
uint8 _targetTokenDecimals,
uint256 _maxSwapAmount
) OKLGProduct(uint8(7), _costToken, _spendAddress) {
oracleAddress = payable(_oracleAddress);
tokenOwner = _tokenOwner;
maxSwapAmount = _maxSwapAmount;
targetTokenDecimals = _targetTokenDecimals;
_token = IERC20Decimals(_tokenAddy);
}
function getSwapTokenAddress() external view returns (address) {
return address(_token);
}
function setActiveState(bool _isActive) external {
require(
msg.sender == owner() || msg.sender == tokenOwner,
'setActiveState user must be contract creator'
);
isActive = _isActive;
}
function setOracleAddress(address _oracleAddress) external onlyOwner {
oracleAddress = payable(_oracleAddress);
transferOwnership(oracleAddress);
}
function setTargetTokenDecimals(uint8 _decimals) external onlyOwner {
targetTokenDecimals = _decimals;
}
function setTokenOwner(address newOwner) external {
require(
msg.sender == tokenOwner,
'user must be current token owner to change it'
);
address previousOwner = tokenOwner;
tokenOwner = newOwner;
emit TokenOwnerUpdated(previousOwner, newOwner);
}
function withdrawTokens(uint256 _amount) external {
require(
msg.sender == tokenOwner,
'withdrawTokens user must be token owner'
);
_token.transfer(msg.sender, _amount);
}
function setSwapCompletionStatus(bytes32 _id, bool _isComplete)
external
onlyOwner
{
swaps[_id].isComplete = _isComplete;
}
function setMinimumGasForOperation(uint256 _amountGas) external onlyOwner {
minimumGasForOperation = _amountGas;
}
function receiveTokensFromSource(uint256 _amount)
external
payable
returns (bytes32, uint256)
{
require(isActive, 'this atomic swap instance is not active');
require(
msg.value >= minimumGasForOperation,
'you must also send enough gas to cover the target transaction'
);
require(
maxSwapAmount == 0 || _amount <= maxSwapAmount,
'trying to send more than maxSwapAmount'
);
_payForService(minimumGasForOperation);
if (minimumGasForOperation > 0) {
oracleAddress.call{ value: minimumGasForOperation }('');
}
_token.transferFrom(msg.sender, address(this), _amount);
uint256 _ts = block.timestamp;
bytes32 _id = sha256(abi.encodePacked(msg.sender, _ts, _amount));
swaps[_id] = Swap({
id: _id,
origTimestamp: _ts,
currentTimestamp: _ts,
isOutbound: false,
isComplete: false,
isRefunded: false,
isRefundable: true,
isSendGasFunded: false,
swapAddress: msg.sender,
amount: _amount
});
lastUserSwap[msg.sender] = swaps[_id];
emit ReceiveTokensFromSource(_id, _ts, msg.sender, _amount);
return (_id, _ts);
}
function unsetLastUserSwap(address _addy) external onlyOwner {
delete lastUserSwap[_addy];
}
// msg.sender must be the user who originally created the swap.
// Otherwise, the unique identifier will not match from the originally
// sending txn.
//
// NOTE: We're aware this function can be spoofed by creating a sha256 hash of msg.sender's address
// and _origTimestamp, but it's important to note refundTokensFromSource and sendTokensToDestination
// can only be executed by the owner/oracle. Therefore validation should be done by the oracle before
// executing those and the only possibility of a vulnerability is if someone has compromised the oracle account.
function fundSendToDestinationGas(
bytes32 _id,
uint256 _origTimestamp,
uint256 _amount
) external payable {
require(
msg.value >= minimumGasForOperation,
'you must send enough gas to cover the send transaction'
);
require(
_id == sha256(abi.encodePacked(msg.sender, _origTimestamp, _amount)),
'we do not recognize this swap'
);
require(!swaps[_id].isSendGasFunded, 'cannot fund swap again');
if (minimumGasForOperation > 0) {
oracleAddress.call{ value: minimumGasForOperation }('');
}
swaps[_id] = Swap({
id: _id,
origTimestamp: _origTimestamp,
currentTimestamp: block.timestamp,
isOutbound: true,
isComplete: swaps[_id].isComplete,
isRefunded: swaps[_id].isRefunded,
isRefundable: swaps[_id].isRefundable,
isSendGasFunded: true,
swapAddress: msg.sender,
amount: _amount
});
}
// This must be called AFTER fundSendToDestinationGas has been executed
// for this txn to fund this send operation
function refundTokensFromSource(bytes32 _id) external {
require(isActive, 'this atomic swap instance is not active');
Swap storage swap = swaps[_id];
require(
swap.isRefundable,
'swap must have been initiated from this chain in order to refund'
);
_confirmSwapExistsGasFundedAndSenderValid(swap);
swap.isRefunded = true;
_token.transfer(swap.swapAddress, swap.amount);
emit RefundTokensToSource(_id, swap.swapAddress, swap.amount);
}
// This must be called AFTER fundSendToDestinationGas has been executed
// for this txn to fund this send operation
function sendTokensToDestination(bytes32 _id) external returns (bytes32) {
require(isActive, 'this atomic swap instance is not active');
Swap storage swap = swaps[_id];
_confirmSwapExistsGasFundedAndSenderValid(swap);
// handle if this token and target chain token in bridge have different decimals
// current decimals = 9 -- 100 tokens == 100000000000
// target decimals = 18 -- 100 tokens == 100000000000000000000
// to get current amount to transfer, need to multiply by ratio of 10^currentDecimals / 10^targetDecimals
uint256 _swapAmount = swap.amount;
if (targetTokenDecimals > 0) {
_swapAmount =
(_swapAmount * 10**_token.decimals()) /
10**targetTokenDecimals;
}
_token.transfer(swap.swapAddress, _swapAmount);
swap.currentTimestamp = block.timestamp;
swap.isComplete = true;
emit SendTokensToDestination(_id, swap.swapAddress, _swapAmount);
return _id;
}
function _confirmSwapExistsGasFundedAndSenderValid(Swap memory swap)
private
view
onlyOwner
{
// functions that call this should only be called by the current owner
// or oracle address as they will do the appropriate validation beforehand
// to confirm the receiving swap is valid before sending tokens to the user.
require(
swap.origTimestamp > 0 && swap.amount > 0,
'swap does not exist yet.'
);
// We're just validating here that the swap has not been
// completed and gas has been funded before moving forward.
require(
!swap.isComplete && !swap.isRefunded && swap.isSendGasFunded,
'swap has already been completed, refunded, or gas has not been funded'
);
}
}
Context.sol 24 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
Ownable.sol 76 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
IERC20.sol 6 lines
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol) pragma solidity ^0.8.0; import "../token/ERC20/IERC20.sol";
IERC20.sol 82 lines
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
Read Contract
getSpendAddress 0xdc3aaab5 → address
getSwapTokenAddress 0xeba760d6 → address
getTokenAddress 0x10fe9ae8 → address
isActive 0x22f3e2d4 → bool
lastUserSwap 0x933a59db → bytes32, uint256, uint256, bool, bool, bool, bool, bool, address, uint256
maxSwapAmount 0xcce987d4 → uint256
minimumGasForOperation 0x8d17359e → uint256
oracleAddress 0xa89ae4ba → address
owner 0x8da5cb5b → address
productID 0xf9fb452f → uint8
swaps 0xeb84e7f2 → bytes32, uint256, uint256, bool, bool, bool, bool, bool, address, uint256
targetTokenDecimals 0xad701278 → uint8
tokenOwner 0xa3e67610 → address
Write Contract 19 functions
These functions modify contract state and require a wallet transaction to execute.
fundSendToDestinationGas 0x8a2e386e
bytes32 _id
uint256 _origTimestamp
uint256 _amount
receiveTokensFromSource 0xed8f584b
uint256 _amount
returns: bytes32, uint256
refundTokensFromSource 0xa1734e60
bytes32 _id
renounceOwnership 0x715018a6
No parameters
sendTokensToDestination 0x1028e492
bytes32 _id
returns: bytes32
setActiveState 0xbfe22a01
bool _isActive
setMinimumGasForOperation 0xcd41ced0
uint256 _amountGas
setOracleAddress 0x4c69c00f
address _oracleAddress
setProductID 0x9e9f695d
uint8 _newId
setSpendAddy 0x7c0bf7bb
address _spendAddy
setSwapCompletionStatus 0x565e6d1c
bytes32 _id
bool _isComplete
setTargetTokenDecimals 0xa06bbf08
uint8 _decimals
setTokenAddy 0x4bc10ccb
address _tokenAddy
setTokenOwner 0x18e02bd9
address newOwner
transferOwnership 0xf2fde38b
address newOwner
unsetLastUserSwap 0x113d4e1e
address _addy
withdrawETH 0xe086e5ec
No parameters
withdrawTokens 0x06b091f9
address _tokenAddy
uint256 _amount
withdrawTokens 0x315a095d
uint256 _amount
Recent Transactions
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