Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.15;
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/finance/PaymentSplitter.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
contract JobBoard is ReentrancyGuard {
// The amount of ETH to be paid per block for a job ad
uint256 public amountPerBlock;
using EnumerableSet for EnumerableSet.AddressSet;
using SafeERC20 for IERC20;
address public owner;
// The struct for a job ad
struct JobAd {
// The ID of the job ad
uint256 id;
// The title of the job ad
string title;
// The description of the job ad
string description;
// The URL where users can apply for the job
string apply_url;
// The expiring date of the job ad
uint256 expiring_date;
// Whether the job ad has been validated or not
bool validated;
//address of ad owner
address owner;
string tags;
}
struct Application {
uint256 id;
string github;
string linkedin;
uint256 jobId;
bool validated;
address owner;
}
// The mapping from job ad IDs to job ads
mapping(uint256 => JobAd) public jobAds;
mapping(uint256 => Application) public applications;
//trustedAddresses are allowed to validate ads
//and applications
EnumerableSet.AddressSet trustedAddresses;
// The counter for generating unique job ad IDs
uint256 public jobAdCounter;
uint256 public applicationCounter;
// The constructor function
constructor() {
// Set the amountPerBlock to a default value of 1 ETH per block
amountPerBlock = 1 ether;
}
modifier onlyOwner() {
require(address(msg.sender) == owner, "!owner");
_;
}
// The function to create a new job ad
function createApplication(
//this info (github and linkedin) will be encrypted in the frontend using
//the public key of the ad owner and the the public key
//of each validator
string memory _github,
string memory _linkedin,
uint _jobId
) public payable {
// Generate a unique ID for the job ad
uint256 applicationId = applicationCounter++;
// Create a new job ad with the specified parameters
Application memory application = Application({
id: applicationId,
github: _github,
linkedin: _linkedin,
jobId: _jobId,
validated: false,
owner: msg.sender
});
applications[applicationId] = application;
}
// The function to create a new job ad
function createAd(
string memory _title,
string memory _description,
string memory _apply_url,
uint256 _expiring_date,
string memory _tags
) public payable {
// Generate a unique ID for the job ad
uint256 adId = jobAdCounter++;
// Create a new job ad with the specified parameters
JobAd memory ad = JobAd({
id: adId,
title: _title,
description: _description,
apply_url: _apply_url,
expiring_date: _expiring_date,
validated: true,
tags: _tags,
owner: msg.sender
});
// Save the new job ad
jobAds[adId] = ad;
// Calculate the fee to be paid for the job ad
uint256 fee = amountPerBlock * (ad.expiring_date - block.number);
// Require the user to pay the fee in ETH
require(msg.value >= fee, "Insufficient ETH");
}
// The function to bump the expiring date of a job ad
function bumpExpiringDate(
uint256 _ad_id,
uint256 _new_expiring_date
) public payable {
// Get the job ad to bump the expiring date for
JobAd storage ad = jobAds[_ad_id];
// Update the expiring date of the job ad
ad.expiring_date = _new_expiring_date;
// Calculate the fee to be paid for extending the expiring date
uint256 fee = amountPerBlock * (ad.expiring_date - block.number);
// Require the user to pay the fee in ETH
require(msg.value >= fee, "Insufficient ETH");
}
// The function to check if a job ad has expired
function isExpired(uint256 _ad_id) public view returns (bool) {
// Get the job ad to check
JobAd storage ad = jobAds[_ad_id];
// Return whether the job ad has expired or not
return (ad.expiring_date <= block.number);
}
// The function to check if a job ad has been validated
function isValidatedAd(uint256 _ad_id) public view returns (bool) {
// Get the job ad to check
JobAd storage ad = jobAds[_ad_id];
return ad.validated;
}
// The function to check if an application has been validated
function isValidatedApplication(
uint256 _application_id
) public view returns (bool) {
// Get the job ad to check
Application storage application = applications[_application_id];
return application.validated;
}
function validateAd(uint256 _ad_id) public {
if (trustedAddresses.contains(msg.sender)) {
JobAd storage ad = jobAds[_ad_id];
}
}
function validateApplication(uint256 _application_id) public {
if (trustedAddresses.contains(msg.sender)) {
Application storage application = applications[_application_id];
// application.confirmations += application.confirmations;
}
}
function distributeGains() public {}
/***
* @notice withdraw funds
* This function allows owner to withdraw funds from contracts
* @param _token address of token to withdraw
* @param _amount amount to withdraw
**/
function withdraw(address _token, uint256 _amount) external onlyOwner {
if (_token != address(0)) {
IERC20(_token).safeTransfer(address(owner), _amount);
} else {
(bool ok, ) = owner.call{value: _amount}("");
require(ok, "Failed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
if (lastIndex != toDeleteIndex) {
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
}
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (finance/PaymentSplitter.sol)
pragma solidity ^0.8.0;
import "../token/ERC20/utils/SafeERC20.sol";
import "../utils/Address.sol";
import "../utils/Context.sol";
/**
* @title PaymentSplitter
* @dev This contract allows to split Ether payments among a group of accounts. The sender does not need to be aware
* that the Ether will be split in this way, since it is handled transparently by the contract.
*
* The split can be in equal parts or in any other arbitrary proportion. The way this is specified is by assigning each
* account to a number of shares. Of all the Ether that this contract receives, each account will then be able to claim
* an amount proportional to the percentage of total shares they were assigned.
*
* `PaymentSplitter` follows a _pull payment_ model. This means that payments are not automatically forwarded to the
* accounts but kept in this contract, and the actual transfer is triggered as a separate step by calling the {release}
* function.
*
* NOTE: This contract assumes that ERC20 tokens will behave similarly to native tokens (Ether). Rebasing tokens, and
* tokens that apply fees during transfers, are likely to not be supported as expected. If in doubt, we encourage you
* to run tests before sending real value to this contract.
*/
contract PaymentSplitter is Context {
event PayeeAdded(address account, uint256 shares);
event PaymentReleased(address to, uint256 amount);
event ERC20PaymentReleased(IERC20 indexed token, address to, uint256 amount);
event PaymentReceived(address from, uint256 amount);
uint256 private _totalShares;
uint256 private _totalReleased;
mapping(address => uint256) private _shares;
mapping(address => uint256) private _released;
address[] private _payees;
mapping(IERC20 => uint256) private _erc20TotalReleased;
mapping(IERC20 => mapping(address => uint256)) private _erc20Released;
/**
* @dev Creates an instance of `PaymentSplitter` where each account in `payees` is assigned the number of shares at
* the matching position in the `shares` array.
*
* All addresses in `payees` must be non-zero. Both arrays must have the same non-zero length, and there must be no
* duplicates in `payees`.
*/
constructor(address[] memory payees, uint256[] memory shares_) payable {
require(payees.length == shares_.length, "PaymentSplitter: payees and shares length mismatch");
require(payees.length > 0, "PaymentSplitter: no payees");
for (uint256 i = 0; i < payees.length; i++) {
_addPayee(payees[i], shares_[i]);
}
}
/**
* @dev The Ether received will be logged with {PaymentReceived} events. Note that these events are not fully
* reliable: it's possible for a contract to receive Ether without triggering this function. This only affects the
* reliability of the events, and not the actual splitting of Ether.
*
* To learn more about this see the Solidity documentation for
* https://solidity.readthedocs.io/en/latest/contracts.html#fallback-function[fallback
* functions].
*/
receive() external payable virtual {
emit PaymentReceived(_msgSender(), msg.value);
}
/**
* @dev Getter for the total shares held by payees.
*/
function totalShares() public view returns (uint256) {
return _totalShares;
}
/**
* @dev Getter for the total amount of Ether already released.
*/
function totalReleased() public view returns (uint256) {
return _totalReleased;
}
/**
* @dev Getter for the total amount of `token` already released. `token` should be the address of an IERC20
* contract.
*/
function totalReleased(IERC20 token) public view returns (uint256) {
return _erc20TotalReleased[token];
}
/**
* @dev Getter for the amount of shares held by an account.
*/
function shares(address account) public view returns (uint256) {
return _shares[account];
}
/**
* @dev Getter for the amount of Ether already released to a payee.
*/
function released(address account) public view returns (uint256) {
return _released[account];
}
/**
* @dev Getter for the amount of `token` tokens already released to a payee. `token` should be the address of an
* IERC20 contract.
*/
function released(IERC20 token, address account) public view returns (uint256) {
return _erc20Released[token][account];
}
/**
* @dev Getter for the address of the payee number `index`.
*/
function payee(uint256 index) public view returns (address) {
return _payees[index];
}
/**
* @dev Triggers a transfer to `account` of the amount of Ether they are owed, according to their percentage of the
* total shares and their previous withdrawals.
*/
function release(address payable account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = address(this).balance + totalReleased();
uint256 payment = _pendingPayment(account, totalReceived, released(account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_released[account] += payment;
_totalReleased += payment;
Address.sendValue(account, payment);
emit PaymentReleased(account, payment);
}
/**
* @dev Triggers a transfer to `account` of the amount of `token` tokens they are owed, according to their
* percentage of the total shares and their previous withdrawals. `token` must be the address of an IERC20
* contract.
*/
function release(IERC20 token, address account) public virtual {
require(_shares[account] > 0, "PaymentSplitter: account has no shares");
uint256 totalReceived = token.balanceOf(address(this)) + totalReleased(token);
uint256 payment = _pendingPayment(account, totalReceived, released(token, account));
require(payment != 0, "PaymentSplitter: account is not due payment");
_erc20Released[token][account] += payment;
_erc20TotalReleased[token] += payment;
SafeERC20.safeTransfer(token, account, payment);
emit ERC20PaymentReleased(token, account, payment);
}
/**
* @dev internal logic for computing the pending payment of an `account` given the token historical balances and
* already released amounts.
*/
function _pendingPayment(
address account,
uint256 totalReceived,
uint256 alreadyReleased
) private view returns (uint256) {
return (totalReceived * _shares[account]) / _totalShares - alreadyReleased;
}
/**
* @dev Add a new payee to the contract.
* @param account The address of the payee to add.
* @param shares_ The number of shares owned by the payee.
*/
function _addPayee(address account, uint256 shares_) private {
require(account != address(0), "PaymentSplitter: account is the zero address");
require(shares_ > 0, "PaymentSplitter: shares are 0");
require(_shares[account] == 0, "PaymentSplitter: account already has shares");
_payees.push(account);
_shares[account] = shares_;
_totalShares = _totalShares + shares_;
emit PayeeAdded(account, shares_);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 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 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), 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 data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @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://diligence.consensys.net/posts/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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @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, it is bubbled up by this
* function (like regular Solidity function calls).
*
* 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.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @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`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// 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 {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// 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;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
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);
}
// SPDX-License-Identifier: MIT
//vedb25b
pragma solidity 0.8.15;
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
contract ISRTickets {
mapping(address => Counters.Counter) public attendeesCount;
}
contract NFTRemote {
function mintItem(
address attendee,
string memory ticketName,
string memory social
) public returns (uint256) {}
function setCancelled(uint256 itemId) public {}
function setSRTicketsDiscountsAddress(address _srtdiscount) public {}
function setSocialTicket(
string memory ticketName,
string memory social,
uint256 itemId
) public {}
}
contract SRTicketsDiscounts {
using Counters for Counters.Counter;
struct DiscountResponse {
bool hasDiscountCode;
bool hasDiscountAddress;
bool hasTokenDiscount;
uint256 discountAmount;
}
struct SenderAndTokenDiscountBuyer {
address sender;
bool tokenDiscountBuyer;
}
mapping(address => mapping(uint256 => Attendee)) private attendees;
mapping(address => Counters.Counter) public attendeesCount;
// attendee details, fields are encrypted on the frontend
struct Attendee {
string email;
string fname;
string lname;
string bio;
string job;
string company;
string social;
string ticket;
string discountCode;
address tokenDiscount;
address sender;
address buyToken;
uint256 pricePaid;
uint256 pricePaidInToken;
bool cancelled;
uint256 refunded;
bool allowResell;
uint256 resellPrice;
string code;
uint256 boughtOn;
bool resold;
uint256 nftId;
}
// discount code details
struct DiscountCode {
uint256 qty;
Counters.Counter used;
uint256 amount;
string code;
uint256 endDate;
uint256 startDate;
}
// discount address details, discount based on buyer address
struct DiscountAddress {
address buyer;
uint256 qty;
Counters.Counter used;
uint256 amount;
string code;
uint256 endDate;
uint256 startDate;
}
// discount token details, discount based on a buyer's token balance
// can be used once only per buyer
struct TokenDiscount {
address token;
uint256 minAmount;
uint256 qty;
Counters.Counter used;
uint256 amount;
uint256 endDate;
uint256 startDate;
}
// @notice store address of ticket contract
address public SRTicketsAddress;
// @notice store address of contract owner
address public owner;
/// @notice stores address of nft contract
address private nftContract;
constructor() {
owner = msg.sender;
}
event LogAttendee(
address indexed attendeeAddress,
uint256 attendeeIndex,
string message
);
event LogResell(
address indexed buyerAddress,
address sellerAddress,
uint256 buyerIndex,
uint256 sellerIndex,
string message
);
/***
* @notice set ticket contract address
* This function allows owner to set contract ticket address
* @param _newAddr contract address
**/
function setSRTicketsAddress(address _newAddr) public {
require(msg.sender == owner, "not owner");
SRTicketsAddress = _newAddr;
}
/***
* @notice set nft contract address
* This function allows owner to set nft contract address
* @param _newAddr contract address
**/
function setNFTContract(address _newAddr) public {
require(msg.sender == owner, "not owner");
nftContract = _newAddr;
}
/***
* @notice set attendee details
* This function sets Attendee details by address and index
* @param _attendeeIndex index of attendee
* @param _newAttendee new attendee struct
* @param _attendee current attendee struct
* @param _sender Address of attendee
* @param _resell true if this operation is a resell of the attendee's ticket
* @param _isRefund true if this operation is a refund of the attendee's ticket
**/
function setAttendee(
uint256 attendeeIndex,
Attendee memory newAttendee,
Attendee memory attendee,
address sender,
bool resell,
bool refund
) public {
require(
msg.sender == SRTicketsAddress,
string.concat(
Strings.toHexString(uint160(msg.sender), 20),
" not allowed, required ",
Strings.toHexString(uint160(SRTicketsAddress), 20)
)
);
Attendee memory exAttendee = attendee;
bool updateSocialTicket = false;
if (
!stringsEquals(exAttendee.social, newAttendee.social) ||
!stringsEquals(exAttendee.ticket, newAttendee.ticket)
) {
updateSocialTicket = true;
}
attendee.email = newAttendee.email;
attendee.fname = newAttendee.fname;
attendee.lname = newAttendee.lname;
attendee.social = newAttendee.social;
attendee.bio = newAttendee.bio;
attendee.job = newAttendee.job;
attendee.company = newAttendee.company;
attendee.allowResell = newAttendee.allowResell;
attendee.resellPrice = newAttendee.resellPrice;
attendee.ticket = newAttendee.ticket;
if (refund) {
attendee.refunded = newAttendee.refunded;
attendee.cancelled = newAttendee.cancelled;
}
if (resell) {
attendees[exAttendee.sender][attendeeIndex].cancelled = true;
attendees[exAttendee.sender][attendeeIndex].allowResell = false;
//set old attendee nft as cancelled
NFTRemote nc = NFTRemote(nftContract);
nc.setCancelled(attendees[exAttendee.sender][attendeeIndex].nftId);
uint256 oldAttendeeIndex = attendeeIndex;
attendee.code = newAttendee.code;
attendee.sender = sender;
attendee.cancelled = false;
attendee.allowResell = false;
attendee.resellPrice = 0;
attendee.resold = true;
// mint new nft for new owner
uint256 nftId = nc.mintItem(
attendee.sender,
attendee.ticket,
attendee.social
);
attendee.nftId = nftId;
emit LogResell(
sender,
exAttendee.sender,
attendeeIndex,
oldAttendeeIndex,
"resell"
);
}
if (updateSocialTicket) {
NFTRemote ncupdated = NFTRemote(nftContract);
ncupdated.setSocialTicket(
attendee.ticket,
attendee.social,
attendee.nftId
);
}
attendees[sender][attendeeIndex] = attendee;
emit LogAttendee(sender, attendeeIndex, "setAttendee");
}
/***
* @notice get discount code amount for an attendee
* This function checks discount code amount
* @params _discountCodeTicketAttendee defines whether attendee has a discount code
* @params _dcQty how many discount in total
* @params _dcStartDate Timestamp of date at which discount can start being used
* @params _dcEndDate Timestamp of date at which discount won't be available anymore
* @params _dcUsed Amount of discount used
* @params _dcAmount Amount of the discount in percentage (eg. 5 for a 5% discount)
**/
function getDiscountCodeAmount(
bool _discountCodeTicketAttendee,
uint256 _dcQty,
uint256 _dcStartDate,
uint256 _dcEndDate,
uint256 _dcUsed,
uint256 _dcAmount
) public view returns (uint256, bool found) {
uint256 discountAmount = 0;
if (_discountCodeTicketAttendee) {
if (
_dcUsed < _dcQty &&
_dcStartDate < block.timestamp &&
_dcEndDate > block.timestamp
) {
discountAmount = _dcAmount;
found = true;
}
}
return (discountAmount, found);
}
/***
* @notice get discount address amount for an attendee
* This function checks discount address amount (discount based on sender address)
* @params _discountAddressTicketAttendee true if attendee has a discount based on address
* @params _dcQty how many discount in total
* @params _dcStartDate Timestamp of date at which discount can start being used
* @params _dcEndDate Timestamp of date at which discount won't be available anymore
* @params _dcUsed Amount of discount used
* @params _dcAmount Amount of the discount in percentage (eg. 5 for a 5% discount)
**/
function getDiscountAddressAmount(
bool _discountAddressTicketAttendee,
uint256 _daQty,
uint256 _daStartDate,
uint256 _daEndDate,
uint256 _daUsed,
uint256 _daAmount,
uint256 _discountAmount
) public view returns (uint256, bool found) {
if (_discountAddressTicketAttendee) {
if (
_daQty > _daUsed &&
_daStartDate < block.timestamp &&
_daEndDate > block.timestamp &&
_daAmount > _discountAmount &&
_daAmount > 0
) {
return (_daAmount, true);
}
}
return (_discountAmount, found);
}
/***
* @notice get token discount amount for an attendee
* This function checks token discount amount (discount based on sender token balance)
* @params _stdb struct with attendee address and whether it has a token discount
* @params _discountAmount Amount of the discount in percentage (eg. 5 for a 5% discount)
* @params _tokenDiscountTicketAttendee checks if a ticket has a token discount associated
* @params _ts token discount struct
* @params _tokenDiscountAttendee address of the token used for discount
**/
function getTokenDiscountAmount(
SenderAndTokenDiscountBuyer memory _stdb,
uint256 _discountAmount,
bool _tokenDiscountTicketAttendee,
TokenDiscount memory _ts,
address _tokenDiscountAttendee
) public view returns (uint256, bool found) {
if (
_tokenDiscountAttendee != address(0) && _tokenDiscountTicketAttendee
) {
//check sender balance
IERC20 tokenDiscount = IERC20(_tokenDiscountAttendee);
uint256 balance = tokenDiscount.balanceOf(_stdb.sender);
if (
(balance > _ts.minAmount &&
_ts.used._value < _ts.qty &&
_ts.startDate < block.timestamp &&
_ts.endDate > block.timestamp &&
_ts.amount > _discountAmount &&
!_stdb.tokenDiscountBuyer)
) {
return (_ts.amount, true);
}
}
return (_discountAmount, found);
}
/***
* @notice get discount amount for an attendee
* This function checks each kind of discount and returns total discount amount
* @params _stdb struct with attendee address and whether it has a token discount
* @params _discountCodeTicketAttendee true if a discount code applies to a given ticket
* @params _dc discount code
* @params _discountAddressTicketAttendee true if attendee has a discount based on address
* @params _da discount address
* @params _tokenDiscountTicketAttendee address of the token used for discount
* @params _ts token discount struct
* @params _tokenDiscountAttendee address of the token used for discount
**/
function getDiscountView(
SenderAndTokenDiscountBuyer memory _stdb,
bool _discountCodeTicketAttendee,
DiscountCode memory _dc,
bool _discountAddressTicketAttendee,
DiscountAddress memory _da,
bool _tokenDiscountTicketAttendee,
TokenDiscount memory _ts,
address _tokenDiscountAttendee
) public view returns (DiscountResponse memory) {
//check sender Discount code
uint256 discountAmount = 0;
DiscountResponse memory dr;
(discountAmount, dr.hasDiscountCode) = getDiscountCodeAmount(
_discountCodeTicketAttendee,
_dc.qty,
_dc.startDate,
_dc.endDate,
_dc.used._value,
_dc.amount
);
(discountAmount, dr.hasDiscountAddress) = getDiscountAddressAmount(
_discountAddressTicketAttendee,
_da.qty,
_da.startDate,
_da.endDate,
_da.used._value,
_da.amount,
discountAmount
);
if (dr.hasDiscountAddress) {
dr.hasDiscountCode = false;
}
(discountAmount, dr.hasTokenDiscount) = getTokenDiscountAmount(
_stdb,
discountAmount,
_tokenDiscountTicketAttendee,
_ts,
_tokenDiscountAttendee
);
if (dr.hasTokenDiscount) {
dr.hasDiscountAddress = false;
dr.hasDiscountCode = false;
}
dr.discountAmount = discountAmount;
return dr;
}
/***
* @notice retrieve attendee details
* This function gets Attendee details by address and index
* @param _sender Address of attendee
* @param _index Attendee ticket index (each attendee can have more than one ticket)
**/
function getAttendee(
address sender,
uint256 index
) public view returns (Attendee memory) {
//SRTicketsRemote str = SRTicketsRemote(sender);
//Attendee memory x = str.attendees(sender, index);
return attendees[sender][index];
}
/***
* @notice retrieve attendee's total spent
* This function gets Attendee total spent on tickets
* @param _sender Address of attendee
**/
function getAttendeeSpent(address sender) public view returns (uint256) {
ISRTickets sr = ISRTickets(SRTicketsAddress);
uint256 count = sr.attendeesCount(sender);
uint256 totalPaidInToken = 0;
for (uint256 i = 0; i < count; i++) {
totalPaidInToken += attendees[sender][i].pricePaidInToken;
}
return totalPaidInToken;
}
}
function stringsEquals(string memory s1, string memory s2) pure returns (bool) {
bytes memory b1 = bytes(s1);
bytes memory b2 = bytes(s2);
uint256 l1 = b1.length;
if (l1 != b2.length) return false;
for (uint256 i = 0; i < l1; i++) {
if (b1[i] != b2[i]) return false;
}
return true;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* 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[EIP 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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
//vedb52
pragma solidity 0.8.15;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
contract SRTicketsNFT is ERC721Enumerable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
mapping(uint256 => string) public socials;
mapping(uint256 => string) public cancelled;
mapping(uint256 => string) public ticketNames;
mapping(uint256 => address) public owners;
string public baseURI;
string public chainName;
address public coowner;
address public owner;
// @notice store address of ticket contract
address public SRTicketsDiscountsAddress;
constructor(string memory _chainName) ERC721("ETHDubai 2025", "EDB25") {
baseURI = "https://ed2025.vercel.app/nftimage.svg";
chainName = _chainName;
owner = msg.sender;
}
function addressToString(
address _addr
) public pure returns (string memory) {
bytes memory buffer = new bytes(40);
for (uint256 i = 0; i < 20; i++) {
bytes1 b = bytes1(uint8(uint160(_addr) / (2 ** (8 * (19 - i)))));
bytes1 hi = bytes1(uint8(b) / 16);
bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
buffer[2 * i] = char(hi);
buffer[2 * i + 1] = char(lo);
}
return string(abi.encodePacked("0x", buffer));
}
function char(bytes1 b) internal pure returns (bytes1) {
if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
else return bytes1(uint8(b) + 0x57);
}
function setOwner(address _owner) public {
require(msg.sender == coowner || msg.sender == owner, "not allowed1");
owner = _owner;
}
function setCoOwner(address _coowner) public {
require(msg.sender == coowner || msg.sender == owner, "not allowed2");
coowner = _coowner;
}
function setSRTicketsDiscountsAddress(address _srtdiscount) public {
require(msg.sender == coowner || msg.sender == owner, "not allowed3");
SRTicketsDiscountsAddress = _srtdiscount;
}
function setChain(string memory _chainName) public {
require(msg.sender == coowner || msg.sender == owner, "not allowed4");
chainName = _chainName;
}
function setBaseURI(string memory _baseURI) public {
require(msg.sender == coowner || msg.sender == owner, "not allowed5");
baseURI = _baseURI;
}
function setCancelled(uint256 itemId) public {
require(
msg.sender == coowner ||
msg.sender == owner ||
msg.sender == SRTicketsDiscountsAddress,
"not allowed6"
);
cancelled[itemId] = "true";
}
function setSocialTicket(
string memory ticketName,
string memory social,
uint256 itemId
) public {
require(
msg.sender == coowner ||
msg.sender == owner ||
msg.sender == SRTicketsDiscountsAddress,
"not allowed7"
);
ticketNames[itemId] = ticketName;
socials[itemId] = social;
}
function mintItem(
address _attendee,
string memory _ticketName,
string memory _social
) public returns (uint256) {
require(
msg.sender == coowner ||
msg.sender == owner ||
msg.sender == SRTicketsDiscountsAddress,
addressToString(msg.sender)
);
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(_attendee, newItemId);
socials[newItemId] = _social;
owners[newItemId] = _attendee;
ticketNames[newItemId] = _ticketName;
cancelled[newItemId] = "false";
return newItemId;
}
function tokenURI(
uint256 tokenId
) public view virtual override returns (string memory) {
require(
tokenId <= _tokenIds.current(),
"ERC721Metadata: URI query for nonexistent token"
);
string memory uri = string.concat(
baseURI,
"?c=",
chainName,
"&id=",
Strings.toString(tokenId),
"&s=",
socials[tokenId],
"&t=",
ticketNames[tokenId],
"&cl=",
cancelled[tokenId]
);
return uri;
}
}
// SPDX-License-Identifier: MIT
//vedb25sonic2
pragma solidity 0.8.15;
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
contract NFTRemote {
function mintItem(
address attendee,
string memory ticketName,
string memory social
) public returns (uint256) {}
function setCancelled(uint256 itemId) public {}
}
contract SRTicketsDiscountsRemote {
struct DiscountResponse {
bool hasDiscountCode;
bool hasDiscountAddress;
bool hasTokenDiscount;
uint256 discountAmount;
}
address public SRTicketsAddress;
struct SenderAndTokenDiscountBuyer {
address sender;
bool tokenDiscountBuyer;
}
function getAttendee(
address sender,
uint256 index
) public view returns (SRTickets.Attendee memory) {}
function getDiscountView(
SenderAndTokenDiscountBuyer memory stdb,
bool discountCodeTicketAttendee,
SRTickets.DiscountCode memory,
bool discountAddressTicketAttendee,
SRTickets.DiscountAddress memory,
bool tokenDiscountTicketAttendee,
SRTickets.TokenDiscount memory,
address tokenDiscountAttendee
) public view returns (DiscountResponse memory) {}
function setAttendee(
uint256 attendeeIndex,
SRTickets.Attendee memory newAttendee,
SRTickets.Attendee memory attendee,
address sender,
bool resell,
bool refund
) public {}
}
contract SRTickets is ReentrancyGuard {
using Counters for Counters.Counter;
using SafeERC20 for IERC20;
/**********
* Events
**********/
event LMint(
address indexed attendeeAddress,
Attendee attendee,
string message
);
event LogBuy(
address indexed attendee,
uint256 amount,
uint256 amountUSD,
address token
);
event LogRefund(
address indexed attendee,
uint256 amount,
uint256 attendeesIndex,
address buyToken
);
event LogSetOwner(address indexed sender, address newOwner);
/***********
* Variables
***********/
// an address of the owner
address public owner;
// an address of the to be confirmed owner
address public tbcOwner;
// when true, people can call the selfRefund function to get a refund
bool public allowSelfRefund;
// when true, people can buy resellable tickets
bool public allowBuyResellable;
// amount by which self-refund decrease every x second
uint256 public refundIncFee;
// time lapse between each self-refund amount decrease
uint256 public refundIncLapse;
// refund fee
uint256 public refundFee;
// fee charged when reselling ticket
uint256 public resellFee;
// ticket struct details
struct Ticket {
uint256 qty;
Counters.Counter used;
uint256 price;
uint256 endDate;
uint256 startDate;
}
// discount code details
struct DiscountCode {
uint256 qty;
Counters.Counter used;
uint256 amount;
string code;
uint256 endDate;
uint256 startDate;
}
// discount address details, discount based on buyer address
struct DiscountAddress {
address buyer;
uint256 qty;
Counters.Counter used;
uint256 amount;
string code;
uint256 endDate;
uint256 startDate;
}
// discount token details, discount based on a buyer's token balance
// can be used once only per buyer
struct TokenDiscount {
address token;
uint256 minAmount;
uint256 qty;
Counters.Counter used;
uint256 amount;
uint256 endDate;
uint256 startDate;
}
// attendee details, fields are encrypted on the frontend
struct Attendee {
string email;
string fname;
string lname;
string bio;
string job;
string company;
string social;
string ticket;
string discountCode;
address tokenDiscount;
address sender;
address buyToken;
uint256 pricePaid;
uint256 pricePaidInToken;
bool cancelled;
uint256 refunded;
bool allowResell;
uint256 resellPrice;
string code;
uint256 boughtOn;
bool resold;
uint256 nftId;
}
/**********
* Mappings
**********/
/// @notice keeps track of list of tickets
mapping(string => Ticket) public tickets;
/// @notice keeps track of list of discount codes
mapping(string => DiscountCode) public discountCodes;
/// @notice keeps track of list of discount addresses
mapping(address => DiscountAddress) public discountAddresses;
/// @notice keeps track of list of token discounts
mapping(address => TokenDiscount) public tokenDiscounts;
/// @notice keeps track of list of token discounts for each ticket
/// @dev mapping(token address => mapping(ticket => bool))
mapping(address => mapping(string => bool)) public tokenDiscountTickets;
/// @notice keeps track of list of token discounts for each buyer. Can be used once only per buyer.
/// @dev mapping(token address => mapping(buyer address => bool))
mapping(address => mapping(address => bool)) public tokenDiscountBuyer;
/// @notice keeps track of list of discounts code for each ticket
/// @dev mapping(discount code => mapping(ticket => bool))
mapping(string => mapping(string => bool)) public discountCodeTickets;
/// @notice keeps track of list of address discounts for each ticket
/// @dev mapping(discount address => mapping(ticket => bool))
mapping(address => mapping(string => bool)) public discountAddressTickets;
/// @notice keeps track of list of chainlink price feeds
mapping(address => address) public priceFeeds;
/// @notice stores address of discount contract
address private discountContract;
/// @notice stores address of nft contract
address private nftContract;
/// @notice store total number of tickets per attendee
mapping(address => Counters.Counter) public attendeesCount;
constructor(address _discountContract, address _nftContract) {
discountContract = _discountContract;
nftContract = _nftContract;
owner = address(msg.sender);
allowSelfRefund = true;
refundFee = 15;
resellFee = 15;
refundIncFee = 3;
refundIncLapse = 1 days;
//remove for prod
//setTicket(100, 100 * 10**8, 9949326229, 1, "conference-only");
//setTicket(25, 50, 9949326229, 1, "iftar-meetup");
//priceFeeds[address(0)] = 0x7f8847242a530E809E17bF2DA5D2f9d2c4A43261; //kovan optimism
//priceFeeds[address(0)] = 0x13e3Ee699D1909E989722E753853AE30b17e08c5; //mainnet optimism
//priceFeeds[address(0)] = 0x639Fe6ab55C921f74e7fac1ee960C0B6293ba612; //mainnet arbitrum
/* setTicket(100, 28750 * 10**6, 9949326229, 1, "modular-blockchain-conf");
setTicket(
100,
46000 * 10**6,
9949326229,
1,
"modular-blockchain-conf-party"
);
setTicket(
100,
138000 * 10**6,
9949326229,
1,
"modular-blockchain-vc-conf-party"
);
setTicket(
100,
149500 * 10**6,
9949326229,
1,
"modular-blockchain-conf-hotel"
);
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"modular-blockchain-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"modular-blockchain-vc-conf-party-hotel"
);
setTicket(100, 28750 * 10**6, 9949326229, 1, "metamask-conf");
setTicket(100, 46000 * 10**6, 9949326229, 1, "metamask-conf-party");
setTicket(100, 138000 * 10**6, 9949326229, 1, "metamask-vc-conf-party");
setTicket(100, 149500 * 10**6, 9949326229, 1, "metamask-conf-hotel");
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"metamask-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"metamask-vc-conf-party-hotel"
);
setTicket(100, 28750 * 10**6, 9949326229, 1, "verilog-conf");
setTicket(100, 46000 * 10**6, 9949326229, 1, "verilog-conf-party");
setTicket(100, 138000 * 10**6, 9949326229, 1, "verilog-vc-conf-party");
setTicket(100, 149500 * 10**6, 9949326229, 1, "verilog-conf-hotel");
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"verilog-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"verilog-vc-conf-party-hotel"
);
setTicket(
100,
28750 * 10**6,
9949326229,
1,
"build-fuelvm-exchange-conf"
);
setTicket(
100,
46000 * 10**6,
9949326229,
1,
"build-fuelvm-exchange-conf-party"
);
setTicket(
100,
138000 * 10**6,
9949326229,
1,
"build-fuelvm-exchange-vc-conf-party"
);
setTicket(
100,
149500 * 10**6,
9949326229,
1,
"build-fuelvm-exchange-conf-hotel"
);
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"build-fuelvm-exchange-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"build-fuelvm-exchange-vc-conf-party-hotel"
);
*/
/*
setTicket(100, 28750 * 10**6, 9949326229, 1, "web3-intro-conf");
setTicket(100, 46000 * 10**6, 9949326229, 1, "web3-intro-conf-party");
setTicket(
100,
138000 * 10**6,
9949326229,
1,
"web3-intro-vc-conf-party"
);
setTicket(100, 149500 * 10**6, 9949326229, 1, "web3-intro-conf-hotel");
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"web3-intro-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"web3-intro-vc-conf-party-hotel"
);
setTicket(100, 28750 * 10**6, 9949326229, 1, "moralis-conf");
setTicket(100, 46000 * 10**6, 9949326229, 1, "moralis-conf-party");
setTicket(100, 138000 * 10**6, 9949326229, 1, "moralis-vc-conf-party");
setTicket(100, 149500 * 10**6, 9949326229, 1, "moralis-conf-hotel");
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"moralis-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"moralis-vc-conf-party-hotel"
);
setTicket(
100,
0x1010b87200,
9949326229,
1,
"modular-blockchain-vc-conf"
);
setTicket(100, 0x1010b87200, 9949326229, 1, "verilog-vc-conf");
setTicket(100, 0x1010b87200, 9949326229, 1, "web3-intro-vc-conf");
setTicket(
100,
0x1010b87200,
9949326229,
1,
"build-fuelvm-exchange-vc-conf"
);
setTicket(
100,
28750 * 10**6,
9949326229,
1,
"partnering-with-giants-conf"
);
setTicket(
100,
138000 * 10**6,
9949326229,
1,
"partnering-with-giants-vc-conf-party"
);
setTicket(
100,
149500 * 10**6,
9949326229,
1,
"partnering-with-giants-conf-hotel"
);
setTicket(
100,
207000 * 10**6,
9949326229,
1,
"partnering-with-giants-conf-party-hotel"
);
setTicket(
100,
287500 * 10**6,
9949326229,
1,
"partnering-with-giants-vc-conf-party-hotel"
);
*/
////mainnet
/*
priceFeeds[address(0)] = 0x4BAD96DD1C7D541270a0C92e1D4e5f12EEEA7a57; //mainnet
//WETH
priceFeeds[
0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
] = 0x4BAD96DD1C7D541270a0C92e1D4e5f12EEEA7a57; //WETH mainnet
//usdt
priceFeeds[
0xdAC17F958D2ee523a2206206994597C13D831ec7
] = 0x3E7d1eAB13ad0104d2750B8863b489D65364e32D;
//dai
priceFeeds[
0x6B175474E89094C44Da98b954EedeAC495271d0F
] = 0xAed0c38402a5d19df6E4c03F4E2DceD6e29c1ee9;
//usdc
priceFeeds[
0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
] = 0x986b5E1e1755e3C2440e960477f25201B0a8bbD4;
//rai
priceFeeds[
0x03ab458634910AaD20eF5f1C8ee96F1D6ac54919
] = 0x483d36F6a1d063d580c7a24F9A42B346f3a69fbb;
//sushi
priceFeeds[
0x6B3595068778DD592e39A122f4f5a5cF09C90fE2
] = 0xCc70F09A6CC17553b2E31954cD36E4A2d89501f7;
//LUSD
priceFeeds[
0x5f98805A4E8be255a32880FDeC7F6728C6568bA0
] = 0x3D7aE7E594f2f2091Ad8798313450130d0Aba3a0;
//MIM
priceFeeds[
0x99D8a9C45b2ecA8864373A26D1459e3Dff1e17F3
] = 0x7A364e8770418566e3eb2001A96116E6138Eb32F;
//xsushi
priceFeeds[
0x8798249c2E607446EfB7Ad49eC89dD1865Ff4272
] = 0xCC1f5d9e6956447630d703C8e93b2345c2DE3D13;
//mkr
priceFeeds[
0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2
] = 0xec1D1B3b0443256cc3860e24a46F108e699484Aa;
//yfi
priceFeeds[
0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e
] = 0xA027702dbb89fbd58938e4324ac03B58d812b0E1;
//comp
priceFeeds[
0xc00e94Cb662C3520282E6f5717214004A7f26888
] = 0xdbd020CAeF83eFd542f4De03e3cF0C28A4428bd5;
//matic
priceFeeds[
0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0
] = 0x7bAC85A8a13A4BcD8abb3eB7d6b4d632c5a57676;
//1inch
priceFeeds[
0x111111111117dC0aa78b770fA6A738034120C302
] = 0xc929ad75B72593967DE83E7F7Cda0493458261D9;
//busd
priceFeeds[
0x4Fabb145d64652a948d72533023f6E7A623C7C53
] = 0x833D8Eb16D306ed1FbB5D7A2E019e106B960965A;
OPTIMISM
priceFeeds[address(0)] = 0x13e3Ee699D1909E989722E753853AE30b17e08c5; //mainnet
//WETH
priceFeeds[
0x4200000000000000000000000000000000000006
] = 0x13e3Ee699D1909E989722E753853AE30b17e08c5; //WETH mainnet
//usdt
priceFeeds[
0x94b008aA00579c1307B0EF2c499aD98a8ce58e58
] = 0xECef79E109e997bCA29c1c0897ec9d7b03647F5E;
//dai
priceFeeds[
0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1
] = 0x8dBa75e83DA73cc766A7e5a0ee71F656BAb470d6;
//usdc
priceFeeds[
0x7F5c764cBc14f9669B88837ca1490cCa17c31607
] = 0x16a9FA2FDa030272Ce99B29CF780dFA30361E0f3;
/*ARBITRUM*
priceFeeds[address(0)] = 0x639Fe6ab55C921f74e7fac1ee960C0B6293ba612;
//WETH
priceFeeds[
0x82aF49447D8a07e3bd95BD0d56f35241523fBab1
] = 0x639Fe6ab55C921f74e7fac1ee960C0B6293ba612; //WETH mainnet
//usdt
priceFeeds[
0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9
] = 0x3f3f5dF88dC9F13eac63DF89EC16ef6e7E25DdE7;
//dai
priceFeeds[
0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1
] = 0xc5C8E77B397E531B8EC06BFb0048328B30E9eCfB;
//usdc
priceFeeds[
0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8
] = 0x50834F3163758fcC1Df9973b6e91f0F0F0434aD3;
//sushi
priceFeeds[
0xd4d42F0b6DEF4CE0383636770eF773390d85c61A
] = 0xb2A8BA74cbca38508BA1632761b56C897060147C;
//MIM
priceFeeds[
0xFEa7a6a0B346362BF88A9e4A88416B77a57D6c2A
] = 0x87121F6c9A9F6E90E59591E4Cf4804873f54A95b;
arbitrum*/
/****polygon
priceFeeds[address(0)] = 0xAB594600376Ec9fD91F8e885dADF0CE036862dE0; //mainnet
//WETH
priceFeeds[
0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619
] = 0xF9680D99D6C9589e2a93a78A04A279e509205945; //WETH mainnet
//usdt
priceFeeds[
0xc2132D05D31c914a87C6611C10748AEb04B58e8F
] = 0x0A6513e40db6EB1b165753AD52E80663aeA50545;
//dai
priceFeeds[
0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063
] = 0x4746DeC9e833A82EC7C2C1356372CcF2cfcD2F3D;
//usdc
priceFeeds[
0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174
] = 0xfE4A8cc5b5B2366C1B58Bea3858e81843581b2F7;
//rai
priceFeeds[
0x00e5646f60AC6Fb446f621d146B6E1886f002905
] = 0x7f45273fD7C644714825345670414Ea649b50b16;
//sushi
priceFeeds[
0x0b3F868E0BE5597D5DB7fEB59E1CADBb0fdDa50a
] = 0x49B0c695039243BBfEb8EcD054EB70061fd54aa0;
polygon */
/******bsc
priceFeeds[address(0)] = 0x0567F2323251f0Aab15c8dFb1967E4e8A7D42aeE; //mainnet
//WETH
priceFeeds[
0x2170Ed0880ac9A755fd29B2688956BD959F933F8
] = 0x9ef1B8c0E4F7dc8bF5719Ea496883DC6401d5b2e; //WETH mainnet
//usdt
priceFeeds[
0x55d398326f99059fF775485246999027B3197955
] = 0xB97Ad0E74fa7d920791E90258A6E2085088b4320;
//dai
priceFeeds[
0x1AF3F329e8BE154074D8769D1FFa4eE058B1DBc3
] = 0x132d3C0B1D2cEa0BC552588063bdBb210FDeecfA;
//usdc
priceFeeds[
0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d
] = 0x51597f405303C4377E36123cBc172b13269EA163;
//sushi
priceFeeds[
0x947950BcC74888a40Ffa2593C5798F11Fc9124C4
] = 0x49B0c695039243BBfEb8EcD054EB70061fd54aa0;
//MIM
priceFeeds[
0xfE19F0B51438fd612f6FD59C1dbB3eA319f433Ba
] = 0xc9D267542B23B41fB93397a93e5a1D7B80Ea5A01;
bsc*/
/******ftm
priceFeeds[address(0)] = 0xf4766552D15AE4d256Ad41B6cf2933482B0680dc; //mainnet
//WETH
priceFeeds[
0xA59982c7A272839cBd93e02Bd8978E9a78189AB5
] = 0x11DdD3d147E5b83D01cee7070027092397d63658; //WETH mainnet
//usdt
priceFeeds[
0x049d68029688eAbF473097a2fC38ef61633A3C7A
] = 0xF64b636c5dFe1d3555A847341cDC449f612307d0;
//dai
priceFeeds[
0x8D11eC38a3EB5E956B052f67Da8Bdc9bef8Abf3E
] = 0x91d5DEFAFfE2854C7D02F50c80FA1fdc8A721e52;
//usdc
priceFeeds[
0x04068DA6C83AFCFA0e13ba15A6696662335D5B75
] = 0x2553f4eeb82d5A26427b8d1106C51499CBa5D99c;
//MIM
priceFeeds[
0x82f0B8B456c1A451378467398982d4834b6829c1
] = 0x28de48D3291F31F839274B8d82691c77DF1c5ceD;
ftm*/
/***avax
priceFeeds[address(0)] = 0x0A77230d17318075983913bC2145DB16C7366156; //mainnet
//WETH
priceFeeds[
0x49D5c2BdFfac6CE2BFdB6640F4F80f226bc10bAB
] = 0x976B3D034E162d8bD72D6b9C989d545b839003b0; //WETH mainnet
//usdt
priceFeeds[
0xde3A24028580884448a5397872046a019649b084
] = 0xEBE676ee90Fe1112671f19b6B7459bC678B67e8a;
//dai
priceFeeds[
0xbA7dEebBFC5fA1100Fb055a87773e1E99Cd3507a
] = 0x51D7180edA2260cc4F6e4EebB82FEF5c3c2B8300;
//usdc
priceFeeds[
0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E
] = 0xF096872672F44d6EBA71458D74fe67F9a77a23B9;
//sushi
priceFeeds[
0x39cf1BD5f15fb22eC3D9Ff86b0727aFc203427cc
] = 0x449A373A090d8A1e5F74c63Ef831Ceff39E94563;
//MIM
priceFeeds[
0x130966628846BFd36ff31a822705796e8cb8C18D
] = 0x54EdAB30a7134A16a54218AE64C73e1DAf48a8Fb;
/* //btc
priceFeeds[
0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
] = 0xF4030086522a5bEEa4988F8cA5B36dbC97BeE88c;
//usdt
priceFeeds[
0xdAC17F958D2ee523a2206206994597C13D831ec7
] = 0x3E7d1eAB13ad0104d2750B8863b489D65364e32D;
//dai
priceFeeds[
0x6B175474E89094C44Da98b954EedeAC495271d0F
] = 0xAed0c38402a5d19df6E4c03F4E2DceD6e29c1ee9;
//bnb
priceFeeds[
0xB8c77482e45F1F44dE1745F52C74426C631bDD52
] = 0x14e613AC84a31f709eadbdF89C6CC390fDc9540A;
//usdc
priceFeeds[
0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
] = 0x986b5E1e1755e3C2440e960477f25201B0a8bbD4;
//link
priceFeeds[
0x514910771AF9Ca656af840dff83E8264EcF986CA
] = 0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c;
//aave
priceFeeds[
0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9
] = 0x547a514d5e3769680Ce22B2361c10Ea13619e8a9;
//tusd
priceFeeds[
0x0000000000085d4780B73119b644AE5ecd22b376
] = 0xec746eCF986E2927Abd291a2A1716c940100f8Ba;
//mim
priceFeeds[
0x99D8a9C45b2ecA8864373A26D1459e3Dff1e17F3
] = 0x7A364e8770418566e3eb2001A96116E6138Eb32F;
//rai
priceFeeds[
0x03ab458634910AaD20eF5f1C8ee96F1D6ac54919
] = 0x483d36F6a1d063d580c7a24F9A42B346f3a69fbb;
//fei
priceFeeds[
0x956F47F50A910163D8BF957Cf5846D573E7f87CA
] = 0x31e0a88fecB6eC0a411DBe0e9E76391498296EE9;
//uni
priceFeeds[
0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984
] = 0x553303d460EE0afB37EdFf9bE42922D8FF63220e;
//sushi
priceFeeds[
0x6B3595068778DD592e39A122f4f5a5cF09C90fE2
] = 0xCc70F09A6CC17553b2E31954cD36E4A2d89501f7;
//xsushi
priceFeeds[
0x8798249c2E607446EfB7Ad49eC89dD1865Ff4272
] = 0xCC1f5d9e6956447630d703C8e93b2345c2DE3D13;
//mkr
priceFeeds[
0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2
] = 0xec1D1B3b0443256cc3860e24a46F108e699484Aa;
//yfi
priceFeeds[
0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e
] = 0xA027702dbb89fbd58938e4324ac03B58d812b0E1;
//comp
priceFeeds[
0xc00e94Cb662C3520282E6f5717214004A7f26888
] = 0xdbd020CAeF83eFd542f4De03e3cF0C28A4428bd5;
//matic
priceFeeds[
0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0
] = 0x7bAC85A8a13A4BcD8abb3eB7d6b4d632c5a57676;
//1inch
priceFeeds[
0x111111111117dC0aa78b770fA6A738034120C302
] = 0xc929ad75B72593967DE83E7F7Cda0493458261D9;
//busd
priceFeeds[
0x4Fabb145d64652a948d72533023f6E7A623C7C53
] = 0x833D8Eb16D306ed1FbB5D7A2E019e106B960965A;
*/
}
/***********
* Modifiers
***********/
modifier validNameSlug(string memory _slug) {
bytes memory tmpSlug = bytes(_slug); // Uses memory
require(tmpSlug.length > 0, "Not valid slug");
_;
}
modifier onlyOwner() {
require(address(msg.sender) == owner, "!owner");
_;
}
/***********
* Functions
***********/
/***
* @notice Allow to set the chainlink feed address of a token
* This function will be called by owner to add support for new tokens to buy tickets
* @param _token The address of the ERC20 token to be used to pay for a ticket
* @param _feed The address of the chainlink feed of the token
**/
function setPriceFeed(address _token, address _feed) public onlyOwner {
priceFeeds[_token] = _feed;
}
/***
* @notice Allow to set refund settings
* This function will be called by owner to set refunds parameters
* @param _allow Sets whether self refunds are enabled or not
* @param _refundFee Percentage of the refunds fee
* @param _resellFee Percentage of resell fee
* @param _refundIncFee Amount by which refund fee gets incremented for self refunds
* @param _refundIncLapse Time lapse between each self refund fee increment for self refunds
**/
function setRefund(
bool _allow,
uint256 _refundFee,
uint256 _resellFee,
uint256 _refundIncFee,
uint256 _refundIncLapse
) public onlyOwner {
allowSelfRefund = _allow;
refundFee = _refundFee;
resellFee = _resellFee;
refundIncFee = _refundIncFee;
refundIncLapse = _refundIncLapse;
}
/***
* @notice Allow to enable or disable reselling globally
* This function will be called by owner to set allowBuyResellable
* @param _allow Sets whether buying resellable is enabled or not
**/
function setResellable(bool _allow) public onlyOwner {
allowBuyResellable = _allow;
}
/***
* @notice Allow to set tickets
* This function will be called by owner to set new or update tickets
* @param _qty Amount of tickets available (eg. 1000 tickets)
* @param _price Price of ticket in USD (eg 100)
* @param _endDate Timestamp of date at which tickets won't be available anymore
* @param _startDate Timestamp of date at which tickets can start being bought
* @param _slug Name of ticket (eg. early_bird)
**/
function setTicket(
uint256 _qty,
uint256 _price,
uint256 _endDate,
uint256 _startDate,
string memory slug
) public validNameSlug(slug) onlyOwner {
Ticket memory t;
t.qty = _qty;
t.price = _price;
t.endDate = _endDate;
t.startDate = _startDate;
tickets[slug] = t;
}
/***
* @notice Allow to set discounts based on buyer's token balance
* This function will be called by owner to set token balance based discounts
* @param _discountToken Address of the token address that will be used (eg. address of $YFI)
* @param _minAmount Minimum amount of tokens buyer must have to get discount (eg. 1 $YFI)
* @param _qty How many times can this discount be used (eg. 10 transactions only)
* @param _amount Amount of the discount in percentage (eg. 5 for a 5% discount)
* @param _endDate Timestamp of date at which discount won't be available anymore
* @param _startDate Timestamp of date at which discount can start being used
* @param _ticketsToAdd Tickets the discount will apply to
* @param _ticketsToRemove Tickets the discount will not apply to anymore
**/
function setTokenDiscount(
address _discountToken,
uint256 _minAmount,
uint256 _qty,
uint256 _amount,
uint256 _endDate,
uint256 _startDate,
string[] memory ticketsToAdd,
string[] memory ticketsToRemove
) public onlyOwner {
TokenDiscount memory td;
td.token = _discountToken;
td.minAmount = _minAmount;
td.qty = _qty;
td.amount = _amount;
td.endDate = _endDate;
td.startDate = _startDate;
tokenDiscounts[_discountToken] = td;
for (uint256 i = 0; i < ticketsToAdd.length; i++) {
tokenDiscountTickets[_discountToken][ticketsToAdd[i]] = true;
}
for (uint256 i = 0; i < ticketsToRemove.length; i++) {
tokenDiscountTickets[_discountToken][ticketsToRemove[i]] = false;
}
}
/***
* @notice Allow to set discounts codes
* This function will be called by owner to set a discount code
* @param _code Value of code that can be used
* @param _qty How many times can this discount be used (eg. 10 transactions only)
* @param _amount Amount of the discount in percentage (eg. 5 for a 5% discount)
* @param _endDate Timestamp of date at which discount won't be available anymore
* @param _startDate Timestamp of date at which discount can start being used
* @param _ticketsToAdd Tickets the discount will apply to
* @param _ticketsToRemote Tickets the discount will not apply to anymore
**/
function setDiscountCodes(
string memory _code,
uint256 _qty,
uint256 _amount,
uint256 _endDate,
uint256 _startDate,
string[] memory _ticketsToAdd,
string[] memory _ticketsToRemove
) public onlyOwner {
DiscountCode memory td;
td.qty = _qty;
td.amount = _amount;
td.endDate = _endDate;
td.startDate = _startDate;
discountCodes[_code] = td;
for (uint256 i = 0; i < _ticketsToAdd.length; i++) {
discountCodeTickets[_code][_ticketsToAdd[i]] = true;
}
for (uint256 i = 0; i < _ticketsToRemove.length; i++) {
discountCodeTickets[_code][_ticketsToRemove[i]] = false;
}
}
/***
* @notice Allow to set discounts based on buyer address
* This function will be called by owner to set address based discounts
* @param _buyer Address of buyer that can use the code
* @param _qty How many times can this discount be used (eg. 10 transactions only)
* @param _amount Amount of the discount in percentage (eg. 5 for a 5% discount)
* @param _endDate Timestamp of date at which discount won't be available anymore
* @param _startDate Timestamp of date at which discount can start being used
* @param _ticketsToAdd Tickets the discount will apply to
* @param _ticketsToRemote Tickets the discount will not apply to anymore
**/
function setDiscountAddresses(
address buyer,
uint256 qty,
uint256 amount,
uint256 endDate,
uint256 startDate,
string[] memory ticketsToAdd,
string[] memory ticketsToRemove
) public onlyOwner {
DiscountAddress memory td;
td.qty = qty;
td.amount = amount;
td.endDate = endDate;
td.startDate = startDate;
discountAddresses[buyer] = td;
for (uint256 i = 0; i < ticketsToAdd.length; i++) {
discountAddressTickets[buyer][ticketsToAdd[i]] = true;
}
for (uint256 i = 0; i < ticketsToRemove.length; i++) {
discountAddressTickets[buyer][ticketsToRemove[i]] = false;
}
}
/***
* @notice Buy ticket function
* This function will be called by tickets buyers to buy tickets
* @param _buyAttendees mapping of Attendee details
* @param _buyToken address of token being used to buy tickets (eg DAI, USDC, if ETH use 0x0)
**/
function mintTicket(
Attendee[] memory _buyAttendees,
address _buyToken
) public payable nonReentrant {
uint256 total = 0;
uint256 discount = 0;
//AggregatorV3Interface priceFeed;
uint256 valueToken = 0;
require(priceFeeds[_buyToken] != address(0), "token not supported");
for (uint256 i = 0; i < _buyAttendees.length; i++) {
require(
tickets[_buyAttendees[i].ticket].used.current() <
tickets[_buyAttendees[i].ticket].qty,
"sold out"
);
require(
tickets[_buyAttendees[i].ticket].startDate < block.timestamp,
"not available yet"
);
require(
tickets[_buyAttendees[i].ticket].endDate > block.timestamp,
"not available anymore"
);
discount = getDiscount(msg.sender, _buyAttendees[i]);
uint256 priceToPay = getPrice(discount, _buyAttendees[i].ticket);
total += priceToPay;
_buyAttendees[i].sender = msg.sender;
_buyAttendees[i].pricePaid = priceToPay;
_buyAttendees[i].pricePaidInToken = getPriceFromUSD(
priceToPay,
_buyToken
);
_buyAttendees[i].boughtOn = block.timestamp;
_buyAttendees[i].buyToken = _buyToken;
NFTRemote nc = NFTRemote(nftContract);
uint256 nftId = nc.mintItem(
msg.sender,
_buyAttendees[i].ticket,
_buyAttendees[i].social
);
_buyAttendees[i].nftId = nftId;
setAttendee(
attendeesCount[msg.sender].current(),
_buyAttendees[i],
_buyAttendees[i],
msg.sender,
false,
false
);
tickets[_buyAttendees[i].ticket].used.increment();
attendeesCount[msg.sender].increment();
emit LMint(msg.sender, _buyAttendees[i], "buy");
}
valueToken = getPriceFromUSD(total, _buyToken);
require(valueToken > 0 || total == 0, "total 0");
if (_buyToken == address(0)) {
require(msg.value >= valueToken, "price too low");
if (msg.value > valueToken) {
(bool ok, ) = msg.sender.call{value: msg.value - valueToken}(
""
);
require(ok, "Failed");
}
} else {
require(
IERC20(_buyToken).transferFrom(
address(msg.sender),
address(this),
uint256(valueToken)
),
"transfer failed"
);
}
emit LogBuy(msg.sender, msg.value, valueToken, _buyToken);
}
/***
* @notice get pricing in USD for a given token
* This function gets pricing from chainlink in USD for a token
* @param _priceUSD amount in USD
* @param _token token address
**/
function getPriceFromUSD(
uint256 _priceUSD,
address _token
) private view returns (uint256) {
AggregatorV3Interface priceFeed;
priceFeed = AggregatorV3Interface(priceFeeds[_token]);
(, int256 latestPrice, , , ) = priceFeed.latestRoundData();
//int256 latestPrice = 326393000000;
uint256 decimals = 18;
if (_token != 0x0000000000000000000000000000000000000000) {
IERC20Metadata ercToken = IERC20Metadata(_token);
decimals = ercToken.decimals();
}
uint256 price = uint256(
(int256(_priceUSD) * int256(10 ** decimals)) / latestPrice
);
return price;
}
/***
* @notice get price minus discount
* This function caluculates price minus discount
* @param _discount discount amount
* @param _ticket ticket slug name
**/
function getPrice(
uint256 _discount,
string memory _ticket
) public view returns (uint256) {
uint256 price = tickets[_ticket].price;
return price - (price * _discount) / 100;
}
/***
* @notice retrieve attendee details
* This function gets Attendee details by address and index
* @param _sender Address of attendee
* @param _index Attendee ticket index (each attendee can have more than one ticket)
**/
function getAttendee(
address _sender,
uint256 _index
) private view returns (Attendee memory attendee) {
SRTicketsDiscountsRemote dc = SRTicketsDiscountsRemote(
discountContract
);
attendee = dc.getAttendee(_sender, _index);
}
/***
* @notice set attendee details
* This function sets Attendee details by address and index
* @param _attendeeIndex index of attendee
* @param _newAttendee new attendee struct
* @param _attendee current attendee struct
* @param _sender Address of attendee
* @param _resell true if this operation is a resell of the attendee's ticket
* @param _isRefund true if this operation is a refund of the attendee's ticket
**/
function setAttendee(
uint256 _attendeeIndex,
Attendee memory _newAttendee,
Attendee memory _attendee,
address _sender,
bool _resell,
bool _isRefund
) private {
SRTicketsDiscountsRemote dc = SRTicketsDiscountsRemote(
discountContract
);
dc.setAttendee(
_attendeeIndex,
_newAttendee,
_attendee,
_sender,
_resell,
_isRefund
);
}
/***
* @notice get discount for an attendee
* This view function checks if an attendee gets a discount
* @param _sender Address of attendee
* @param _attendee current attendee struct
**/
function getDiscountView(
address _sender,
Attendee memory _attendee
) public view returns (uint256) {
SRTicketsDiscountsRemote.DiscountResponse memory dr = getDiscountAmount(
_sender,
_attendee
);
return dr.discountAmount; //discountCodeTickets["50pc-discount"]["conference-only"];
}
/***
* @notice get discount for all attendees
* This view function checks if each attendee gets a discount
* @param _sender Address of buyer
* @param _attendees attendees array
**/
function getDiscountsView(
address _sender,
Attendee[] memory _attendees
) public view returns (uint256) {
uint256 total = 0;
for (uint256 i = 0; i < _attendees.length; i++) {
SRTicketsDiscountsRemote.DiscountResponse
memory dr = getDiscountAmount(_sender, _attendees[i]);
total = total + dr.discountAmount; //discountCodeTickets["50pc-discount"]["conference-only"];
}
return total;
}
/***
* @notice get discount amount for an attendee
* This function checks if an attendee gets a discount and apllies it if true
* @param _sender Address of attendee
* @param _attendee current attendee struct
**/
function getDiscount(
address _sender,
Attendee memory _attendee
) private returns (uint256) {
SRTicketsDiscountsRemote.DiscountResponse memory dr = getDiscountAmount(
_sender,
_attendee
);
if (dr.hasDiscountCode) {
discountCodes[_attendee.discountCode].used.increment();
}
if (dr.hasDiscountAddress) {
discountAddresses[_sender].used.increment();
}
if (dr.hasTokenDiscount) {
tokenDiscounts[_attendee.tokenDiscount].used.increment();
tokenDiscountBuyer[_attendee.tokenDiscount][_sender] = true;
}
return dr.discountAmount;
}
/***
* @notice get discount amount for an attendee
* This function computes discount amount for an attendee if any
* @param _sender Address of attendee
* @param _attendee current attendee struct
**/
function getDiscountAmount(
address _sender,
Attendee memory _attendee
) private view returns (SRTicketsDiscountsRemote.DiscountResponse memory) {
//check sender Discount code
SRTicketsDiscountsRemote dc = SRTicketsDiscountsRemote(
discountContract
);
SRTicketsDiscountsRemote.SenderAndTokenDiscountBuyer memory stdb;
stdb.sender = _sender;
stdb.tokenDiscountBuyer = tokenDiscountBuyer[_attendee.tokenDiscount][
_sender
];
SRTicketsDiscountsRemote.DiscountResponse memory dr = dc
.getDiscountView(
stdb,
discountCodeTickets[_attendee.discountCode][_attendee.ticket],
discountCodes[_attendee.discountCode],
discountAddressTickets[_attendee.sender][_attendee.ticket],
discountAddresses[_attendee.sender],
tokenDiscountTickets[_attendee.tokenDiscount][_attendee.ticket],
tokenDiscounts[_attendee.tokenDiscount],
_attendee.tokenDiscount
);
return dr;
}
/***
* @notice update attendee details
* This function allows an attendee to update their own ticket
* if new ticket is more expensive, attendee needs to pay the difference
* @param _attendeeIndex attendee index
* @param _newAttendee new attendee details
**/
function updateAttendee(
uint256 _attendeeIndex,
address _attendeeAddress,
Attendee memory _newAttendee
) public payable nonReentrant {
Attendee memory oldAttendee = getAttendee(
_attendeeAddress,
_attendeeIndex
);
require(
oldAttendee.sender == msg.sender || msg.sender == owner,
"not allowed to update"
);
require(!oldAttendee.cancelled, "already cancelled");
//if attendee is just updating eg. their name but same ticket, skip even if ticket has gone up in price
if (
(oldAttendee.sender == msg.sender || msg.sender == owner) &&
!stringsEquals(_newAttendee.ticket, oldAttendee.ticket)
) {
require(
tickets[_newAttendee.ticket].used.current() <
tickets[_newAttendee.ticket].qty,
"sold out"
);
require(
tickets[_newAttendee.ticket].startDate < block.timestamp,
"not available yet"
);
require(
tickets[_newAttendee.ticket].endDate > block.timestamp,
"not available anymore"
);
//only charge more if attendee is updating to a different more expensive ticket
if (tickets[_newAttendee.ticket].price > oldAttendee.pricePaid) {
uint256 newAmountPaidInToken = getPriceFromUSD(
tickets[_newAttendee.ticket].price - oldAttendee.pricePaid,
oldAttendee.buyToken
);
if (oldAttendee.buyToken == address(0)) {
require(
msg.value >= newAmountPaidInToken,
"new ticket more expensive"
);
} else {
require(
IERC20(oldAttendee.buyToken).transferFrom(
address(msg.sender),
address(this),
newAmountPaidInToken
),
"transfer failed"
);
}
//increase number of tickets used with this update
tickets[_newAttendee.ticket].used.increment();
//decrease number of tickets used for attendee ticket pre-update
tickets[oldAttendee.ticket].used.decrement();
oldAttendee.pricePaid = tickets[_newAttendee.ticket].price;
oldAttendee.pricePaidInToken =
oldAttendee.pricePaidInToken +
newAmountPaidInToken;
}
}
setAttendee(
_attendeeIndex,
_newAttendee,
oldAttendee,
_attendeeAddress,
false,
false
);
}
/***
* @notice refund attendee
* This function allows owner to refund attendee
* @param _buyer buyer's address
* @param _attendeeIndex attendee index
* @param _amount amount to refund
**/
function refund(
address _buyer,
uint256 _attendeeIndex,
uint256 _amount
) public onlyOwner nonReentrant {
Attendee memory attendee = getAttendee(_buyer, _attendeeIndex);
require(
attendee.pricePaidInToken >= _amount,
"refund higher than paid price"
);
require(!attendee.cancelled, "already cancelled");
//set attendee nft as cancelled
NFTRemote nc = NFTRemote(nftContract);
nc.setCancelled(attendee.nftId);
tickets[attendee.ticket].used.decrement();
if (attendee.buyToken != address(0)) {
IERC20(attendee.buyToken).safeTransfer(
address(attendee.sender),
_amount
);
attendee.refunded = _amount;
attendee.cancelled = true;
setAttendee(
_attendeeIndex,
attendee,
attendee,
attendee.sender,
false,
true
);
} else {
(bool ok, ) = address(_buyer).call{value: _amount}("");
require(ok, "Failed");
attendee.refunded = _amount;
attendee.cancelled = true;
setAttendee(
_attendeeIndex,
attendee,
attendee,
attendee.sender,
false,
true
);
}
emit LogRefund(_buyer, _amount, _attendeeIndex, attendee.buyToken);
}
/***
* @notice self-refund attendee
* This function allows attendee to get a refund automatically
* as time passes by, every x seconds the refundable amount decreases by y
* x is refundIncLapse and y refundIncFee
* @param _attendeeIndex attendee index
**/
function selfRefund(uint256 _attendeeIndex) public nonReentrant {
Attendee memory attendee = getAttendee(msg.sender, _attendeeIndex);
require(attendee.sender == msg.sender, "sender is not buyer");
require(allowSelfRefund, "refund not possible");
require(!attendee.cancelled, "already cancelled");
require(!attendee.resold, "resold, see refund with reseller");
require(
tickets[attendee.ticket].endDate > block.timestamp,
"refund not possible anymore"
);
uint256 feePercentage = (refundIncFee *
(block.timestamp - attendee.boughtOn)) / refundIncLapse;
require(feePercentage < 100, "refund not possible");
uint256 amount = attendee.pricePaidInToken -
((feePercentage * attendee.pricePaidInToken) / 100);
//set attendee nft as cancelled
NFTRemote nc = NFTRemote(nftContract);
nc.setCancelled(attendee.nftId);
tickets[attendee.ticket].used.decrement();
if (attendee.buyToken != address(0)) {
IERC20(attendee.buyToken).safeTransfer(
address(attendee.sender),
amount
);
attendee.refunded = amount;
attendee.cancelled = true;
setAttendee(
_attendeeIndex,
attendee,
attendee,
attendee.sender,
false,
true
);
} else {
(bool ok, ) = address(attendee.sender).call{value: amount}("");
require(ok, "Failed");
attendee.refunded = amount;
attendee.cancelled = true;
setAttendee(
_attendeeIndex,
attendee,
attendee,
attendee.sender,
false,
true
);
}
}
/***
* @notice buy a resellable ticket
* This function allows anyone to buy someone's else ticket as long as allowResell is true
* @param _attendeeIndex attendee index
* @param _newAttendee newAttendee details
**/
function buyResellable(
uint256 _attendeeIndex,
Attendee memory _newAttendee
) public payable nonReentrant {
Attendee memory attendee = getAttendee(
_newAttendee.sender,
_attendeeIndex
);
bool canUpdate = false;
require(attendee.allowResell, "not for sell");
require(allowBuyResellable, "reselling desabled");
require(!attendee.cancelled, "already cancelled");
require(
stringsEquals(_newAttendee.ticket, attendee.ticket),
"different ticket"
);
if (attendee.buyToken != address(0)) {
require(
IERC20(attendee.buyToken).transferFrom(
address(msg.sender),
address(this),
uint256((attendee.resellPrice * resellFee) / 100)
),
"transfer failed"
);
require(
IERC20(attendee.buyToken).transferFrom(
address(msg.sender),
address(attendee.sender),
uint256(
attendee.resellPrice -
(attendee.resellPrice * resellFee) /
100
)
),
"transfer failed"
);
canUpdate = true;
} else {
require(msg.value == attendee.resellPrice, "not enough fund");
(bool ok, ) = attendee.sender.call{
value: attendee.resellPrice -
(attendee.resellPrice * resellFee) /
100
}("");
require(ok, "Failed");
canUpdate = true;
}
if (canUpdate) {
setAttendee(
attendeesCount[msg.sender].current(),
_newAttendee,
attendee,
msg.sender,
true,
false
);
attendeesCount[msg.sender].increment();
}
}
/***
* @notice withdraw funds
* This function allows owner to withdraw funds from contracts
* @param _token address of token to withdraw
* @param _amount amount to withdraw
**/
function withdraw(address _token, uint256 _amount) external onlyOwner {
if (_token != address(0)) {
IERC20(_token).safeTransfer(address(owner), _amount);
} else {
(bool ok, ) = owner.call{value: _amount}("");
require(ok, "Failed");
}
}
function setOwner(address _newOwner) public onlyOwner {
tbcOwner = _newOwner;
emit LogSetOwner(msg.sender, _newOwner);
}
function confirmOwner(address _newOwner) public onlyOwner {
require(_newOwner == tbcOwner, "not confirmed");
require(
_newOwner != 0x0000000000000000000000000000000000000000,
"address cant be 0"
);
owner = _newOwner;
}
/* function getThing() public view returns (uint256) {
// return discountAddressTickets[attendee.sender][attendee.ticket];
//return discountAddresses[0x70997970C51812dc3A010C7d01b50e0d17dc79C8];
AggregatorV3Interface priceFeed;
priceFeed = AggregatorV3Interface(
priceFeeds[0x0000000000000000000000000000000000000000]
);
(, int256 latestPrice, , , ) = priceFeed.latestRoundData();
//int256 latestPrice = 326393000000;
//uint256 price = uint256((int256(100 * 10**8) * 10**18) / latestPrice);
return uint256(latestPrice);
}
*/
}
function stringsEquals(string memory s1, string memory s2) pure returns (bool) {
bytes memory b1 = bytes(s1);
bytes memory b2 = bytes(s2);
uint256 l1 = b1.length;
if (l1 != b2.length) return false;
for (uint256 i = 0; i < l1; i++) {
if (b1[i] != b2[i]) return false;
}
return true;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
pragma solidity ^0.8.15;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract TestToken is ERC20 {
constructor() ERC20("TestToken", "TT") {
mintTokens();
}
function mintTokens() public {
_mint(msg.sender, 100000000000000000000000);
}
function mintTokensTo(address beneficiary) public {
_mint(beneficiary, 100000000000000000000000);
}
}