Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- Lottery
- Optimization enabled
- true
- Compiler version
- v0.8.19+commit.7dd6d404
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2024-09-26T15:32:28.715456Z
Contract source code
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 value) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 value) external returns (bool);
}
abstract contract Entropy_interface {
function get_entropy() public virtual view returns (uint256);
function new_round() virtual external;
function deposit_entropy_reward() external virtual payable;
function get_entropy_collateral() public view virtual returns (uint256);
function get_number_of_revealed() public view virtual returns(uint256);
}
contract Lottery {
event NewRound(uint256 indexed round_id);
event RoundFinished(uint256 indexed round_id, address indexed winner, uint256 reward, uint256 rng);
event Deposit(address indexed depositor, uint256 amount_deposited, uint256 amount_credited);
event Refund(address indexed receiver, uint256 indexed round_id, uint256 amount);
address public owner = msg.sender;
address payable public entropy_contract;
address payable public reward_pool_contract; // Token rewards go to the special "staking contract"
//uint256 public deposits_phase_duration = 3 days; // The length of a phase when deposits are accepted;
//uint256 public entropy_phase_duration = 1 days; // The length of a phase when entropy providers reveal their entropy inputs;
uint256 public deposits_phase_duration = 10 minutes;
uint256 public entropy_phase_duration = 5 minutes;
uint256 public entropy_fee = 30; // (will be divided by 1000 during calculations i.e. 1 means 0.1%) | this reward goes to the entropy providers reward pool
// 30 is 3%
uint256 public token_reward_fee = 100; // This reward goes to staked tokens reward pool
// 100 is 10%
uint256 public min_allowed_bet = 1000 ether; // 1K CLO for now
uint8 public max_allowed_deposits = 20; // A user can make 20 bets during a single round
uint256 public max_deposit_pool_threshold = 0; // Specifies the maximal amount the lottery will accept.
// After the amount is reached
// the lottery will no longer accept deposits.
// 0 means "unlimited".
uint256 public current_round;
uint256 public round_start_timestamp;
uint256 public round_reward;
bool public round_reward_paid = false;
mapping (uint256 => bool) public round_failed; // Allows "refunds" of not succesful rounds.
uint256 public current_interval_end; // Used for winner calculations
bool public debug_mode = true;
modifier only_debug
{
require(debug_mode);
_;
}
struct interval
{
uint256 interval_start;
uint256 interval_end;
}
struct player
{
mapping (uint256 => uint8) num_deposits;
uint256 last_round;
mapping (uint256 => mapping (uint8 => interval)) win_conditions; // This player is considered to be a winner when RNG provides a number that matches this intervals
mapping (uint256 => bool) round_refunded;
}
mapping (address => player) public players;
receive() external payable
{
if(get_phase() == 0)
{
start_new_round();
}
else if(get_phase() == 1)
{
deposit();
}
else
{
revert();
}
}
function get_round() public view returns (uint256)
{
return current_round;
}
function get_max_deposit_threshold() public view returns (uint256)
{
return max_deposit_pool_threshold;
}
function get_win_conditions(address _player, uint256 _round, uint8 _depoindex) public view returns(uint256 _start, uint256 _end)
{
_start = players[_player].win_conditions[_round][_depoindex].interval_start;
_end = players[_player].win_conditions[_round][_depoindex].interval_end;
}
function is_winner(address _user) public view returns (bool)
{
bool winner = false;
for (uint8 i = 0; i <= players[_user].num_deposits[current_round]; i++)
{
if(players[_user].win_conditions[current_round][i].interval_start < RNG() && players[_user].win_conditions[current_round][i].interval_end > RNG())
{
winner = true;
}
}
return winner;
}
function get_phase() public view returns (uint8)
{
// 0 - the lottery is not active / pending new round start
// 1 - a lottery round is in progress / acquiring deposits
// 2 - deposits are acquired / entropy revealing phase
// 3 - entropy is revealed, but winner is not paid / it is the time to pay the winner
// 4 - round is finished and the winner is paid / anyone can start a new round
uint8 _status = 0;
if(round_start_timestamp <= block.timestamp && block.timestamp <= round_start_timestamp + deposits_phase_duration)
{
_status = 1;
}
else if (round_start_timestamp < block.timestamp && block.timestamp < round_start_timestamp + deposits_phase_duration + entropy_phase_duration)
{
_status = 2;
}
else if (round_start_timestamp != 0 && round_start_timestamp < block.timestamp && block.timestamp > round_start_timestamp + deposits_phase_duration + entropy_phase_duration && !round_reward_paid)
{
_status = 3;
}
/*
else if (round_start_timestamp < block.timestamp && block.timestamp > round_start_timestamp + deposits_phase_duration + entropy_phase_duration && round_reward_paid)
{
_status = 4;
}
*/
return _status;
}
function deposit() public payable
{
require (msg.value >= min_allowed_bet, "Minimum bet condition is not met");
require (players[msg.sender].num_deposits[current_round] < max_allowed_deposits || players[msg.sender].last_round < current_round, "Too much deposits during this round");
require (get_phase() == 1, "Deposits are only allowed during the depositing phase");
if(max_deposit_pool_threshold != 0)
{
require(msg.value + round_reward <= max_deposit_pool_threshold, "Round reward threshold exceeded");
}
if(players[msg.sender].last_round < current_round)
{
players[msg.sender].last_round = current_round;
players[msg.sender].num_deposits[current_round] = 0;
}
else
{
players[msg.sender].num_deposits[current_round]++;
}
// Assign the "winning interval" for the player
players[msg.sender].win_conditions[current_round][players[msg.sender].num_deposits[current_round]].interval_start = current_interval_end;
players[msg.sender].win_conditions[current_round][players[msg.sender].num_deposits[current_round]].interval_end = current_interval_end + msg.value;
current_interval_end += msg.value;
uint256 _reward_after_fees = msg.value;
// TODO: replace it with SafeMath
// TODO: update the contract to only send rewards upon completion of the round
send_token_reward(msg.value * token_reward_fee / 1000);
_reward_after_fees -= (msg.value * token_reward_fee / 1000);
send_entropy_reward(msg.value * entropy_fee / 1000);
_reward_after_fees -= msg.value * entropy_fee / 1000;
round_reward += _reward_after_fees;
emit Deposit(msg.sender, msg.value, _reward_after_fees);
}
function refund(uint256 _round) external
{
//require(current_round > _round, "Only refunds of finished rounds are allowed");
require(round_failed[_round], "Only refunds of FAILED rounds are allowed");
// Calculating the refund amount
uint256 _reward = 0;
for (uint8 i = 0; i <= players[msg.sender].num_deposits[_round]; i++)
{
_reward += players[msg.sender].win_conditions[_round][i].interval_end - players[msg.sender].win_conditions[_round][i].interval_start;
}
uint256 _reward_before_fees = _reward;
// Subtract the entropy fee
_reward -= _reward_before_fees * entropy_fee / 1000;
_reward -= _reward_before_fees * token_reward_fee / 1000;
players[msg.sender].round_refunded[_round] = true;
payable(msg.sender).transfer(_reward);
emit Refund(msg.sender, _round, _reward);
}
function send_entropy_reward(uint256 _reward) internal
{
//entropy_contract.transfer(msg.value * entropy_fee / 1000);
//entropy_contract.transfer(_reward);
Entropy_interface(entropy_contract).deposit_entropy_reward{value: _reward}();
}
function send_token_reward(uint256 _reward) internal
{
//reward_pool_contract.transfer(msg.value * token_reward_fee / 1000);
//reward_pool_contract.transfer(_reward);
reward_pool_contract.call{value: _reward};
}
function start_new_round() public payable
{
require(current_round == 0 || round_reward_paid, "Cannot start a new round while reward for the previous one is not paid. Call finish_round function");
current_round++;
emit NewRound(current_round);
round_start_timestamp = block.timestamp;
current_interval_end = 0;
round_reward_paid = false;
Entropy_interface(entropy_contract).new_round();
//require_entropy_provider(msg.sender); // Request the starter of a new round to also provide initial entropy
// Initiate the first deposit of the round
deposit();
}
function finish_round(address payable _winner) public
{
// Important: finishing an active round does not automatically start a new one
require(block.timestamp > round_start_timestamp + deposits_phase_duration + entropy_phase_duration, "Round can be finished after the entropy reveal phase only");
//require(check_entropy_criteria(), "There is not enough entropy to ensure a fair winner calculation");
if(check_entropy_criteria())
{
// Round is succsefully completed and there was enough entropy provided
// Paying the winner
// Safe loop, cannot be more than 20 iterations
for (uint8 i = 0; i <= players[_winner].num_deposits[current_round]; i++)
{
if(players[_winner].win_conditions[current_round][i].interval_start < RNG() && players[_winner].win_conditions[current_round][i].interval_end >= RNG())
{
_winner.transfer(round_reward);
round_reward_paid = true;
}
}
emit RoundFinished(current_round, _winner, round_reward, RNG());
}
else
{
// Round is completed without sufficient entropy => allow refunds and increase the round counter
// round_successful[current_round] = false; // This values are `false` by default in solidity
round_failed[current_round] = true;
round_reward_paid = true;
emit RoundFinished(current_round, address(0), 0, 0);
}
require(round_reward_paid, "The provided address is not a winner of the current round");
}
function pay_fees() internal
{
}
function RNG() public view returns (uint256)
{
// Primitive random number generator dependant on both `entropy` and `interval` for testing reasons
uint256 _entropy = Entropy_interface(entropy_contract).get_entropy();
uint256 _timestamp = round_start_timestamp + deposits_phase_duration + entropy_phase_duration;
uint256 _result;
assembly
{
let x := sload(min_allowed_bet.slot)
_entropy := mul(_entropy, _timestamp)
_entropy := mul(_entropy, x)
_entropy := mul(_entropy, 115792089237316195423570985008687907853269984665640564039457584007913129639935)
}
// `entropy` is a random value; can be greater or less than `current_interval_end`
if(_entropy > current_interval_end)
{
_result = _entropy % current_interval_end;
}
else
{
_result = current_interval_end % _entropy;
}
return _result;
}
function check_entropy_criteria() public returns (bool)
{
// Needs to check the sufficiency of entropy for the round reward prizepool size
//return true;
return Entropy_interface(entropy_contract).get_number_of_revealed() > 0;
}
modifier only_owner
{
require(msg.sender == owner);
_;
}
modifier only_entropy_contract
{
require(msg.sender == entropy_contract);
_;
}
function set_entropy_contract(address payable _new_contract) public only_owner
{
entropy_contract = _new_contract;
}
function set_reward_contract(address payable _new_contract) public only_owner
{
reward_pool_contract = _new_contract;
}
function rescueERC20(address token, address to) external only_owner {
uint256 value = IERC20(token).balanceOf(address(this));
IERC20(token).transfer(to, value);
}
function configure(uint256 _min_bet, uint8 _max_deposits, uint256 _max_deposit_threshold, uint256 _deposit_phase_duration, uint256 _reveal_phase_duration) public only_owner
{
min_allowed_bet = _min_bet;
max_allowed_deposits = _max_deposits;
max_deposit_pool_threshold = _max_deposit_threshold;
deposits_phase_duration = _deposit_phase_duration;
entropy_phase_duration = _reveal_phase_duration;
}
function configureFees(uint256 _entropy_fee, uint256 _token_reward_fee) public only_owner
{
entropy_fee = _entropy_fee;
token_reward_fee = _token_reward_fee;
}
function forceWithdraw(uint256 _amount) only_owner only_debug public
{
payable(msg.sender).transfer(_amount);
}
function disableDebug() only_debug only_owner public
{
debug_mode = false;
}
}
Contract ABI
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payable"}],"name":"entropy_contract","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"entropy_fee","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"entropy_phase_duration","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"finish_round","inputs":[{"type":"address","name":"_winner","internalType":"address payable"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"forceWithdraw","inputs":[{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"get_max_deposit_threshold","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"get_phase","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"get_round","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"_start","internalType":"uint256"},{"type":"uint256","name":"_end","internalType":"uint256"}],"name":"get_win_conditions","inputs":[{"type":"address","name":"_player","internalType":"address"},{"type":"uint256","name":"_round","internalType":"uint256"},{"type":"uint8","name":"_depoindex","internalType":"uint8"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"is_winner","inputs":[{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"max_allowed_deposits","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"max_deposit_pool_threshold","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"min_allowed_bet","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"last_round","internalType":"uint256"}],"name":"players","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"refund","inputs":[{"type":"uint256","name":"_round","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"rescueERC20","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"address","name":"to","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address 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payable"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"set_reward_contract","inputs":[{"type":"address","name":"_new_contract","internalType":"address payable"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"start_new_round","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"token_reward_fee","inputs":[]},{"type":"receive","stateMutability":"payable"}]
Contract Creation Code
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