Source Code
Latest 16 from a total of 16 transactions
| Transaction Hash |
|
Block
|
From
|
To
|
|||||
|---|---|---|---|---|---|---|---|---|---|
| Purchase Credits | 409762473 | 50 days ago | IN | 0 ETH | 0.00000089 | ||||
| Transfer Ownersh... | 396754195 | 87 days ago | IN | 0 ETH | 0.00000136 | ||||
| Withdraw | 396750280 | 87 days ago | IN | 0 ETH | 0.00000322 | ||||
| Withdraw | 396749950 | 87 days ago | IN | 0 ETH | 0.00000419 | ||||
| Purchase Credits | 396722109 | 87 days ago | IN | 0 ETH | 0.00000105 | ||||
| Purchase Credits | 388069952 | 112 days ago | IN | 0 ETH | 0.00000172 | ||||
| Withdraw | 385603075 | 119 days ago | IN | 0 ETH | 0.00000051 | ||||
| Purchase Credits | 385602513 | 119 days ago | IN | 0 ETH | 0.00000069 | ||||
| Withdraw | 381784135 | 131 days ago | IN | 0 ETH | 0.00000057 | ||||
| Purchase Credits | 381779317 | 131 days ago | IN | 0 ETH | 0.00000071 | ||||
| Withdraw | 380815640 | 133 days ago | IN | 0 ETH | 0.00000055 | ||||
| Purchase Credits | 380444130 | 134 days ago | IN | 0 ETH | 0.00000083 | ||||
| Withdraw | 380441869 | 134 days ago | IN | 0 ETH | 0.00000081 | ||||
| Purchase Credits | 380441647 | 134 days ago | IN | 0 ETH | 0.0000009 | ||||
| Withdraw | 380440913 | 134 days ago | IN | 0 ETH | 0.00000077 | ||||
| Purchase Credits | 380438990 | 134 days ago | IN | 0 ETH | 0.00000086 |
Cross-Chain Transactions
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Contract Name:
CreditsExchange
Compiler Version
v0.8.28+commit.7893614a
Optimization Enabled:
No with 200 runs
Other Settings:
cancun EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.28;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
contract CreditsExchange is Ownable {
/// @dev SafeERC20 is a wrapper around IERC20 that reverts if the transfer fails
using SafeERC20 for IERC20;
/// @dev The address of the USDC token that is used to purchase credits
IERC20 public immutable usdc;
/**
* @notice Emitted on credits purchase
* @param buyer The address of the buyer
* @param amount The amount of credits
* @param timestamp The timestamp of the purchase
*/
event CreditsPurchased(address buyer, uint256 amount, uint256 timestamp);
/**
* @dev Emitted when a tokens (ERC20 and native) is withdrawn from the contract
* @notice To withdraw native tokens, set `token` to `address(0)`
* @dev Callable only by the owner
* @param token The address of the token
* @param amount The amount of the token
* @param recipient The address of the recipient
*/
event Withdrawn(address token, uint256 amount, address recipient);
/// @dev Revert if the address is the zero address
error ZeroAddress();
/// @dev Revert if the amount is zero
error ZeroAmount();
/// @dev Function to receive ETH
receive() external payable { }
/**
* @notice Constructor
* @param _initialOwner The address of the initial owner
* @param _usdc The address of the USDC token
*/
constructor(address _initialOwner, address _usdc) Ownable(_initialOwner) {
require(_usdc != address(0), ZeroAddress());
usdc = IERC20(_usdc);
}
/**
* @notice Purchases credits
* @dev Emits a CreditsPurchased event
* @param amount The amount of credits to be purchased
*/
function purchaseCredits(uint256 amount) external {
require(amount > 0, ZeroAmount());
emit CreditsPurchased(msg.sender, amount, block.timestamp);
usdc.safeTransferFrom(msg.sender, address(this), amount);
}
/**
* @notice Withdraws tokens from the contract
* @dev To withdraw native tokens, set `token` to `address(0)`
* @dev Callable only by the owner
* @dev Emits a Withdrawn event
* @param token The address of the token to be withdrawn
* @param amount The amount of the token to be withdrawn
* @param recipient The address of the recipient
*/
function withdraw(address token, uint256 amount, address recipient) external onlyOwner {
require(recipient != address(0), ZeroAddress());
if (token == address(0)) {
Address.sendValue(payable(recipient), amount);
} else {
IERC20(token).safeTransfer(recipient, amount);
}
emit Withdrawn(token, amount, recipient);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)
pragma solidity >=0.4.16;
/**
* @dev Interface of the ERC-20 standard as defined in the ERC.
*/
interface IERC20 {
/**
* @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);
/**
* @dev Returns the value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 value) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../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.
*
* The initial owner is set to the address provided by the deployer. 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;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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 {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_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);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC-20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
/**
* @dev An operation with an ERC-20 token failed.
*/
error SafeERC20FailedOperation(address token);
/**
* @dev Indicates a failed `decreaseAllowance` request.
*/
error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
if (!_safeTransfer(token, to, value, true)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
if (!_safeTransferFrom(token, from, to, value, true)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
*/
function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
return _safeTransfer(token, to, value, false);
}
/**
* @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
*/
function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
return _safeTransferFrom(token, from, to, value, false);
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*
* IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
* smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
* this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
* that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
forceApprove(token, spender, oldAllowance + value);
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
* value, non-reverting calls are assumed to be successful.
*
* IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
* smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
* this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
* that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
unchecked {
uint256 currentAllowance = token.allowance(address(this), spender);
if (currentAllowance < requestedDecrease) {
revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
}
forceApprove(token, spender, currentAllowance - requestedDecrease);
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*
* NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
* only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
* set here.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
if (!_safeApprove(token, spender, value, false)) {
if (!_safeApprove(token, spender, 0, true)) revert SafeERC20FailedOperation(address(token));
if (!_safeApprove(token, spender, value, true)) revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
* code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* Reverts if the returned value is other than `true`.
*/
function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
if (to.code.length == 0) {
safeTransfer(token, to, value);
} else if (!token.transferAndCall(to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
* has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* Reverts if the returned value is other than `true`.
*/
function transferFromAndCallRelaxed(
IERC1363 token,
address from,
address to,
uint256 value,
bytes memory data
) internal {
if (to.code.length == 0) {
safeTransferFrom(token, from, to, value);
} else if (!token.transferFromAndCall(from, to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
* code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
* Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
* once without retrying, and relies on the returned value to be true.
*
* Reverts if the returned value is other than `true`.
*/
function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
if (to.code.length == 0) {
forceApprove(token, to, value);
} else if (!token.approveAndCall(to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Imitates a Solidity `token.transfer(to, value)` call, relaxing the requirement on the return value: the
* return value is optional (but if data is returned, it must not be false).
*
* @param token The token targeted by the call.
* @param to The recipient of the tokens
* @param value The amount of token to transfer
* @param bubble Behavior switch if the transfer call reverts: bubble the revert reason or return a false boolean.
*/
function _safeTransfer(IERC20 token, address to, uint256 value, bool bubble) private returns (bool success) {
bytes4 selector = IERC20.transfer.selector;
assembly ("memory-safe") {
let fmp := mload(0x40)
mstore(0x00, selector)
mstore(0x04, and(to, shr(96, not(0))))
mstore(0x24, value)
success := call(gas(), token, 0, 0, 0x44, 0, 0x20)
// if call success and return is true, all is good.
// otherwise (not success or return is not true), we need to perform further checks
if iszero(and(success, eq(mload(0x00), 1))) {
// if the call was a failure and bubble is enabled, bubble the error
if and(iszero(success), bubble) {
returndatacopy(fmp, 0, returndatasize())
revert(fmp, returndatasize())
}
// if the return value is not true, then the call is only successful if:
// - the token address has code
// - the returndata is empty
success := and(success, and(iszero(returndatasize()), gt(extcodesize(token), 0)))
}
mstore(0x40, fmp)
}
}
/**
* @dev Imitates a Solidity `token.transferFrom(from, to, value)` call, relaxing the requirement on the return
* value: the return value is optional (but if data is returned, it must not be false).
*
* @param token The token targeted by the call.
* @param from The sender of the tokens
* @param to The recipient of the tokens
* @param value The amount of token to transfer
* @param bubble Behavior switch if the transfer call reverts: bubble the revert reason or return a false boolean.
*/
function _safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value,
bool bubble
) private returns (bool success) {
bytes4 selector = IERC20.transferFrom.selector;
assembly ("memory-safe") {
let fmp := mload(0x40)
mstore(0x00, selector)
mstore(0x04, and(from, shr(96, not(0))))
mstore(0x24, and(to, shr(96, not(0))))
mstore(0x44, value)
success := call(gas(), token, 0, 0, 0x64, 0, 0x20)
// if call success and return is true, all is good.
// otherwise (not success or return is not true), we need to perform further checks
if iszero(and(success, eq(mload(0x00), 1))) {
// if the call was a failure and bubble is enabled, bubble the error
if and(iszero(success), bubble) {
returndatacopy(fmp, 0, returndatasize())
revert(fmp, returndatasize())
}
// if the return value is not true, then the call is only successful if:
// - the token address has code
// - the returndata is empty
success := and(success, and(iszero(returndatasize()), gt(extcodesize(token), 0)))
}
mstore(0x40, fmp)
mstore(0x60, 0)
}
}
/**
* @dev Imitates a Solidity `token.approve(spender, value)` call, relaxing the requirement on the return value:
* the return value is optional (but if data is returned, it must not be false).
*
* @param token The token targeted by the call.
* @param spender The spender of the tokens
* @param value The amount of token to transfer
* @param bubble Behavior switch if the transfer call reverts: bubble the revert reason or return a false boolean.
*/
function _safeApprove(IERC20 token, address spender, uint256 value, bool bubble) private returns (bool success) {
bytes4 selector = IERC20.approve.selector;
assembly ("memory-safe") {
let fmp := mload(0x40)
mstore(0x00, selector)
mstore(0x04, and(spender, shr(96, not(0))))
mstore(0x24, value)
success := call(gas(), token, 0, 0, 0x44, 0, 0x20)
// if call success and return is true, all is good.
// otherwise (not success or return is not true), we need to perform further checks
if iszero(and(success, eq(mload(0x00), 1))) {
// if the call was a failure and bubble is enabled, bubble the error
if and(iszero(success), bubble) {
returndatacopy(fmp, 0, returndatasize())
revert(fmp, returndatasize())
}
// if the return value is not true, then the call is only successful if:
// - the token address has code
// - the returndata is empty
success := and(success, and(iszero(returndatasize()), gt(extcodesize(token), 0)))
}
mstore(0x40, fmp)
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/Address.sol)
pragma solidity ^0.8.20;
import {Errors} from "./Errors.sol";
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev There's no code at `target` (it is not a contract).
*/
error AddressEmptyCode(address target);
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
if (address(this).balance < amount) {
revert Errors.InsufficientBalance(address(this).balance, amount);
}
(bool success, bytes memory returndata) = recipient.call{value: amount}("");
if (!success) {
_revert(returndata);
}
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason or custom error, it is bubbled
* up by this function (like regular Solidity function calls). However, if
* the call reverted with no returned reason, this function reverts with a
* {Errors.FailedCall} error.
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
if (address(this).balance < value) {
revert Errors.InsufficientBalance(address(this).balance, value);
}
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
* was not a contract or bubbling up the revert reason (falling back to {Errors.FailedCall}) in case
* of an unsuccessful call.
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata
) internal view returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
// only check if target is a contract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
if (returndata.length == 0 && target.code.length == 0) {
revert AddressEmptyCode(target);
}
return returndata;
}
}
/**
* @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
* revert reason or with a default {Errors.FailedCall} error.
*/
function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
return returndata;
}
}
/**
* @dev Reverts with returndata if present. Otherwise reverts with {Errors.FailedCall}.
*/
function _revert(bytes memory returndata) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly ("memory-safe") {
revert(add(returndata, 0x20), mload(returndata))
}
} else {
revert Errors.FailedCall();
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)
pragma solidity >=0.6.2;
import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";
/**
* @title IERC1363
* @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
*
* Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
* after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
*/
interface IERC1363 is IERC20, IERC165 {
/*
* Note: the ERC-165 identifier for this interface is 0xb0202a11.
* 0xb0202a11 ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferAndCall(address to, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @param data Additional data with no specified format, sent in call to `to`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param from The address which you want to send tokens from.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferFromAndCall(address from, address to, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param from The address which you want to send tokens from.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @param data Additional data with no specified format, sent in call to `to`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function approveAndCall(address spender, uint256 value) external returns (bool);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
* @param data Additional data with no specified format, sent in call to `spender`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Errors.sol)
pragma solidity ^0.8.20;
/**
* @dev Collection of common custom errors used in multiple contracts
*
* IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
* It is recommended to avoid relying on the error API for critical functionality.
*
* _Available since v5.1._
*/
library Errors {
/**
* @dev The ETH balance of the account is not enough to perform the operation.
*/
error InsufficientBalance(uint256 balance, uint256 needed);
/**
* @dev A call to an address target failed. The target may have reverted.
*/
error FailedCall();
/**
* @dev The deployment failed.
*/
error FailedDeployment();
/**
* @dev A necessary precompile is missing.
*/
error MissingPrecompile(address);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)
pragma solidity >=0.4.16;
import {IERC20} from "../token/ERC20/IERC20.sol";// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)
pragma solidity >=0.4.16;
import {IERC165} from "../utils/introspection/IERC165.sol";// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)
pragma solidity >=0.4.16;
/**
* @dev Interface of the ERC-165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[ERC].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}{
"remappings": [
"@openzeppelin/contracts/=dependencies/openzeppelin-contracts/contracts/",
"@openzeppelin/contracts-upgradeable/=dependencies/openzeppelin-contracts-upgradeable/contracts/",
"forge-std/=lib/forge-std/src/",
"openzeppelin-foundry-upgrades/=lib/openzeppelin-foundry-upgrades/src/",
"ds-test/=dependencies/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/",
"erc4626-tests/=dependencies/openzeppelin-contracts/lib/erc4626-tests/",
"halmos-cheatcodes/=dependencies/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
"openzeppelin-contracts-upgradeable/=dependencies/openzeppelin-contracts-upgradeable/",
"openzeppelin-contracts/=dependencies/openzeppelin-contracts/"
],
"optimizer": {
"enabled": false,
"runs": 200
},
"metadata": {
"useLiteralContent": false,
"bytecodeHash": "ipfs",
"appendCBOR": true
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"evmVersion": "cancun",
"viaIR": true
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"address","name":"_initialOwner","type":"address"},{"internalType":"address","name":"_usdc","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"FailedCall","type":"error"},{"inputs":[{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"uint256","name":"needed","type":"uint256"}],"name":"InsufficientBalance","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"ZeroAddress","type":"error"},{"inputs":[],"name":"ZeroAmount","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"buyer","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"CreditsPurchased","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"}],"name":"Withdrawn","type":"event"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"purchaseCredits","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"usdc","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000002af8fdada65c88e62561d2680ceae9578c187669000000000000000000000000af88d065e77c8cc2239327c5edb3a432268e5831
-----Decoded View---------------
Arg [0] : _initialOwner (address): 0x2AF8FdadA65c88E62561d2680cEaE9578c187669
Arg [1] : _usdc (address): 0xaf88d065e77c8cC2239327C5EDb3A432268e5831
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000002af8fdada65c88e62561d2680ceae9578c187669
Arg [1] : 000000000000000000000000af88d065e77c8cc2239327c5edb3a432268e5831
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Net Worth in USD
$9.99
Net Worth in ETH
0.003783
Token Allocations
USDC
100.00%
Multichain Portfolio | 35 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
|---|---|---|---|---|---|
| ARB | 100.00% | $0.999701 | 9.99 | $9.99 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.