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Overview
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0 ETH
Eth Value
$0.00More Info
Private Name Tags
ContractCreator
Latest 25 from a total of 690 transactions
| Transaction Hash |
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| Unstake | 17446026 | 595 days ago | IN | 0 ETH | 0.00483871 | ||||
| Unstake | 17445958 | 596 days ago | IN | 0 ETH | 0.00464381 | ||||
| Unstake | 17445923 | 596 days ago | IN | 0 ETH | 0.00477396 | ||||
| Unstake | 17394114 | 603 days ago | IN | 0 ETH | 0.0157956 | ||||
| Stake | 17013760 | 657 days ago | IN | 0 ETH | 0.00523942 | ||||
| Unstake | 16840356 | 681 days ago | IN | 0 ETH | 0.00709103 | ||||
| Unstake | 16840348 | 681 days ago | IN | 0 ETH | 0.00748556 | ||||
| Stake | 16829727 | 682 days ago | IN | 0 ETH | 0.00525682 | ||||
| Stake | 16605781 | 714 days ago | IN | 0 ETH | 0.00398183 | ||||
| Stake | 16605750 | 714 days ago | IN | 0 ETH | 0.00401768 | ||||
| Unstake | 16605668 | 714 days ago | IN | 0 ETH | 0.00364877 | ||||
| Unstake | 16605614 | 714 days ago | IN | 0 ETH | 0.0038237 | ||||
| Stake | 16505753 | 728 days ago | IN | 0 ETH | 0.00366047 | ||||
| Unstake | 16505691 | 728 days ago | IN | 0 ETH | 0.00365387 | ||||
| Stake | 16500579 | 729 days ago | IN | 0 ETH | 0.00524398 | ||||
| Unstake | 16500558 | 729 days ago | IN | 0 ETH | 0.00542788 | ||||
| Unstake | 16500486 | 729 days ago | IN | 0 ETH | 0.00534995 | ||||
| Unstake | 16500477 | 729 days ago | IN | 0 ETH | 0.00525322 | ||||
| Unstake | 16500393 | 729 days ago | IN | 0 ETH | 0.00555392 | ||||
| Unstake | 16500185 | 729 days ago | IN | 0 ETH | 0.00367013 | ||||
| Stake | 16498211 | 729 days ago | IN | 0 ETH | 0.00362839 | ||||
| Unstake | 16494764 | 729 days ago | IN | 0 ETH | 0.00434838 | ||||
| Unstake | 16439507 | 737 days ago | IN | 0 ETH | 0.00432495 | ||||
| Stake | 16381542 | 745 days ago | IN | 0 ETH | 0.00350637 | ||||
| Unstake | 16376517 | 746 days ago | IN | 0 ETH | 0.00412129 |
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Contract Source Code Verified (Exact Match)
Contract Name:
TokenGeyserManager
Compiler Version
v0.6.6+commit.6c089d02
Contract Source Code (Solidity)
/**
*Submitted for verification at Etherscan.io on 2021-02-11
*/
pragma solidity ^0.6.0;
// SPDX-License-Identifier: MIT
interface ITokenGeyserManager {
/**
@dev Retrieves total rewards earned for a specific staking token
@param token - address of the ERC20 token
*/
function getEarned(address token) external view returns (uint256);
/**
@dev Retrieves staked amount for a specific token address
@param token - address of the ERC20 token
*/
function getStake(address token) external view returns (uint256);
/**
@dev Retrieves total rewards earned for all the staking tokens
*/
function getEarnings()
external
view
returns (address[] memory, uint256[] memory);
/**
@dev Retrieves all stakes for sender
*/
function getStakes()
external
view
returns (address[] memory, uint256[] memory);
/**
@dev Stakes all tokens sent
@param tokens - array of tokens' addresses you want to stake
@param amounts - stake amount you want for each token
*/
function stake(
address[] calldata tokens,
uint256[] calldata amounts,
int256 nftId
) external returns (bool);
/**
@dev Unstakes all tokens sent
@param tokens - array of tokens' addresses you want to unstake
@param amounts - unstake amount you want for each token
*/
function unstake(address[] calldata tokens, uint256[] calldata amounts)
external;
/**
@dev Adds a new geyser in the team
@param token - address of the staking token for which the geyser was created
@param geyser - address of the geyser
*/
function addGeyser(address token, address geyser) external returns (bool);
event Staked(address indexed sender, address indexed token, uint256 amount);
event Unstaked(
address indexed sender,
address indexed token,
uint256 amount
);
event GeyserAdded(
address indexed sender,
address indexed geyser,
address token
);
event GeyserManagerCreated(
address indexed sender,
address indexed geyserManager
);
}
// SPDX-License-Identifier: MIT
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
/*
* @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 GSN 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 payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
/**
* @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 guidelines: functions revert instead
* of 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 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view 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 {_setupDecimals} is
* called.
*
* 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 returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, 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}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), 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}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, 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:
*
* - `to` 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 = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(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);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(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 Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @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 to 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 { }
}
// SPDX-License-Identifier: MIT
/**
* @title Staking interface, as defined by EIP-900.
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-900.md
*/
interface IStaking {
event Staked(
address indexed user,
uint256 amount,
uint256 total,
bytes data
);
event Unstaked(
address indexed user,
uint256 amount,
uint256 total,
bytes data
);
function unstake(address staker, uint256 amount, bytes calldata data) external;
function totalStakedFor(address addr) external view returns (uint256);
function totalStaked() external view returns (uint256);
function token() external view returns (address);
function supportsHistory() external pure returns (bool);
}
// SPDX-License-Identifier: MIT
/**
* @title Staking interface, as defined by EIP-900.
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-900.md
*/
interface IStakeWithNFT {
function stake(
address staker,
uint256 amount,
bytes calldata data,
int256 nftId
) external;
function stakeFor(
address staker,
address user,
uint256 amount,
bytes calldata data,
int256 nftId
) external;
}
// SPDX-License-Identifier: MIT
/**
* @title A simple holder of tokens.
* This is a simple contract to hold tokens. It's useful in the case where a separate contract
* needs to hold multiple distinct pools of the same token.
*/
contract TokenPool is Ownable {
IERC20 public token;
bool private _isTokenRescuable;
constructor(IERC20 _token) public {
token = _token;
_isTokenRescuable = false;
}
function balance() public view returns (uint256) {
return token.balanceOf(address(this));
}
function setRescuable(bool rescuable) public onlyOwner {
_isTokenRescuable = rescuable;
}
function transfer(address to, uint256 value)
external
onlyOwner
returns (bool)
{
return token.transfer(to, value);
}
function rescueFunds(
address tokenToRescue,
address to,
uint256 amount
) external onlyOwner returns (bool) {
if (!_isTokenRescuable) {
require(
address(token) != tokenToRescue,
"TokenPool: Cannot claim token held by the contract"
);
}
return IERC20(tokenToRescue).transfer(to, amount);
}
}
// SPDX-License-Identifier: MIT
/**
* @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
/**
* @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
/**
* @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
/**
* @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 tokenId);
/**
* @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
/**
* @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
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// SPDX-License-Identifier: MIT
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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");
// solhint-disable-next-line avoid-low-level-calls
(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");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
/**
* @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;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
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] = toDeleteIndex + 1; // All indexes are 1-based
// 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) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// 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);
}
// 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(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(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(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(uint256(_at(set._inner, index)));
}
// 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));
}
}
// SPDX-License-Identifier: MIT
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
return _get(map, key, "EnumerableMap: nonexistent key");
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element 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(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint256(value)));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key), errorMessage)));
}
}
// SPDX-License-Identifier: MIT
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` 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);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = byte(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// 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;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// If there is no base URI, return the token URI.
if (bytes(_baseURI).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(_baseURI, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(_baseURI, tokenId.toString()));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = 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 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 {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view 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 returns (bool) {
return _tokenOwners.contains(tokenId);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `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);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(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 = ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(tokenId);
emit Transfer(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(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @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()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
function _approve(address to, uint256 tokenId) private {
_tokenApprovals[tokenId] = to;
emit Approval(ownerOf(tokenId), to, tokenId);
}
/**
* @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 { }
}
// SPDX-License-Identifier: MIT
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () internal {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
/**
* @dev ERC721 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC721Pausable is ERC721, Pausable {
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
require(!paused(), "ERC721Pausable: token transfer while paused");
}
}
/*
uint256 public constant socialNftIdentifier = uint256(1);
uint256 public constant rareNftIdentifier = uint256(2);
uint256 public constant epicNftIdentifier = uint256(4);
uint256 public constant legendaryNftIdentifier = uint256(8);
*/
contract WarpNFT is Ownable, ERC721Pausable {
uint256 public idTracker;
// converts id -> token type
mapping(uint256 => uint256) public tokenType;
/**
@notice the constructor function is fired only once during contract deployment
@dev assuming all NFT URI metadata is based on a URL he baseURI would be something like https://
**/
constructor() public ERC721("Warp Finance", "WNFT") {
idTracker = 0;
}
/**
@notice mintNewNFT allows the owner of this contract to mint an input address a newNFT
@param _to is the address the NFT is being minted to
**/
function mintNewNFT(
address _to,
uint256 _type,
string memory _tokenURI
) public onlyOwner {
_safeMint(_to, idTracker);
_setTokenURI(idTracker, _tokenURI);
tokenType[idTracker] = _type;
idTracker++;
}
function burn(uint256 tokenId) public onlyOwner {
_burn(tokenId);
}
function setTokenURI(uint256 tokenId, string memory _tokenURI)
public
onlyOwner
{
_setTokenURI(tokenId, _tokenURI);
}
function setBaseURI(string memory baseURI_) public onlyOwner {
_setBaseURI(baseURI_);
}
function pause() public onlyOwner {
_pause();
}
function unpause() public onlyOwner {
_unpause();
}
}
// SPDX-License-Identifier: MIT
/**
* @title Token Geyser
* @dev A smart-contract based mechanism to distribute tokens over time, inspired loosely by
* Compound and Uniswap.
*
* Distribution tokens are added to a locked pool in the contract and become unlocked over time
* according to a once-configurable unlock schedule. Once unlocked, they are available to be
* claimed by users.
*
* A user may deposit tokens to accrue ownership share over the unlocked pool. This owner share
* is a function of the number of tokens deposited as well as the length of time deposited.
* Specifically, a user's share of the currently-unlocked pool equals their "deposit-seconds"
* divided by the global "deposit-seconds". This aligns the new token distribution with long
* term supporters of the project, addressing one of the major drawbacks of simple airdrops.
*
* More background and motivation available at:
* https://github.com/ampleforth/RFCs/blob/master/RFCs/rfc-1.md
*/
contract TokenGeyser is IStaking, IStakeWithNFT, Ownable {
using SafeMath for uint256;
event Staked(
address indexed user,
uint256 amount,
uint256 total,
bytes data
);
event Unstaked(
address indexed user,
uint256 amount,
uint256 total,
bytes data
);
event TokensClaimed(address indexed user, uint256 amount);
event TokensLocked(uint256 amount, uint256 durationSec, uint256 total);
// amount: Unlocked tokens, total: Total locked tokens
event TokensUnlocked(uint256 amount, uint256 total);
TokenPool private _stakingPool;
TokenPool private _unlockedPool;
TokenPool private _lockedPool;
//
// Time-bonus params
//
uint256 public bonusDecimals = 2;
uint256 public startBonus = 0;
uint256 public bonusPeriodSec = 0;
//
// Global accounting state
//
uint256 public totalLockedShares = 0;
uint256 public totalStakingShares = 0;
uint256 private _totalStakingShareSeconds = 0;
uint256 private _lastAccountingTimestampSec = now;
uint256 private _maxUnlockSchedules = 0;
uint256 private _initialSharesPerToken = 0;
//
// User accounting state
//
// Represents a single stake for a user. A user may have multiple.
struct Stake {
uint256 stakingShares;
uint256 timestampSec;
}
// Caches aggregated values from the User->Stake[] map to save computation.
// If lastAccountingTimestampSec is 0, there's no entry for that user.
struct UserTotals {
uint256 stakingShares;
uint256 stakingShareSeconds;
uint256 lastAccountingTimestampSec;
}
// Aggregated staking values per user
mapping(address => UserTotals) private _userTotals;
// The collection of stakes for each user. Ordered by timestamp, earliest to latest.
mapping(address => Stake[]) private _userStakes;
//
// Locked/Unlocked Accounting state
//
struct UnlockSchedule {
uint256 initialLockedShares;
uint256 unlockedShares;
uint256 lastUnlockTimestampSec;
uint256 endAtSec;
uint256 durationSec;
}
UnlockSchedule[] public unlockSchedules;
WarpNFT public _warpNFT;
address public geyserManager;
mapping(address => uint256) public originalAmounts;
mapping(address => uint256) public extraAmounts;
uint256 public totalExtra;
mapping(address => uint256) userEarnings;
/**
* @param stakingToken The token users deposit as stake.
* @param distributionToken The token users receive as they unstake.
* @param maxUnlockSchedules Max number of unlock stages, to guard against hitting gas limit.
* @param startBonus_ Starting time bonus
* e.g. 25% means user gets 25% of max distribution tokens.
* @param bonusPeriodSec_ Length of time for bonus to increase linearly to max.
* @param initialSharesPerToken Number of shares to mint per staking token on first stake.
* @param bonusDecimals_ The number of decimals for shares
*/
constructor(
IERC20 stakingToken,
IERC20 distributionToken,
uint256 maxUnlockSchedules,
uint256 startBonus_,
uint256 bonusPeriodSec_,
uint256 initialSharesPerToken,
uint256 bonusDecimals_,
address warpNFT,
address managerAddress
) public {
// The start bonus must be some fraction of the max. (i.e. <= 100%)
require(
startBonus_ <= 10**bonusDecimals_,
"TokenGeyser: start bonus too high"
);
// If no period is desired, instead set startBonus = 100%
// and bonusPeriod to a small value like 1sec.
require(bonusPeriodSec_ != 0, "TokenGeyser: bonus period is zero");
require(
initialSharesPerToken > 0,
"TokenGeyser: initialSharesPerToken is zero"
);
require(bonusDecimals_ > 0, "TokenGeyser: bonusDecimals_ is zero");
_stakingPool = new TokenPool(stakingToken);
_unlockedPool = new TokenPool(distributionToken);
_lockedPool = new TokenPool(distributionToken);
_unlockedPool.setRescuable(true);
geyserManager = managerAddress;
startBonus = startBonus_;
bonusDecimals = bonusDecimals_;
bonusPeriodSec = bonusPeriodSec_;
_maxUnlockSchedules = maxUnlockSchedules;
_initialSharesPerToken = initialSharesPerToken;
_warpNFT = WarpNFT(warpNFT);
}
/**
* @return Total earnings for a user
*/
function getEarnings(address user) public view returns (uint256) {
return userEarnings[user];
}
/**
* @dev Rescue rewards
*/
function rescueRewards(address user) external onlyOwner {
require(totalUnlocked() > 0, "TokenGeyser: Nothing to rescue");
require(
_unlockedPool.transfer(user, _unlockedPool.balance()),
"TokenGeyser: rescue rewards from rewards pool failed"
);
}
/**
* @return The token users deposit as stake.
*/
function getStakingToken() public view returns (IERC20) {
return _stakingPool.token();
}
/**
* @return The token users receive as they unstake.
*/
function getDistributionToken() public view returns (IERC20) {
assert(_unlockedPool.token() == _lockedPool.token());
return _unlockedPool.token();
}
/**
* @dev Transfers amount of deposit tokens from the user.
* @param amount Number of deposit tokens to stake.
* @param data Not used.
*/
function stake(
address staker,
uint256 amount,
bytes calldata data,
int256 nftId
) external override {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
_stakeFor(staker, staker, amount, nftId);
}
/**
* @dev Transfers amount of deposit tokens from the caller on behalf of user.
* @param user User address who gains credit for this stake operation.
* @param amount Number of deposit tokens to stake.
* @param data Not used.
*/
function stakeFor(
address staker,
address user,
uint256 amount,
bytes calldata data,
int256 nftId
) external override onlyOwner {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
_stakeFor(staker, user, amount, nftId);
}
/**
* @dev Retrieves the boost you get for a specific NFT
* @param beneficiary The address who receives the bonus
* @param amount The amount for which the bonus is calculated
* @param nftId The NFT identifier
*/
function getNftBoost(
address beneficiary,
uint256 amount,
int256 nftId
) public view returns (uint256) {
if (nftId < 0) return 0;
if (_warpNFT.ownerOf(uint256(nftId)) != beneficiary) return 0;
uint256 nftType = _warpNFT.tokenType(uint256(nftId));
if (nftType == uint256(1)) return 0;
// 1 | Social - no boost
// 2 | Rare - 15% boost
// 4 | Epic - 75% boost
// 8 | Legendary - 150% boost
uint256 bonus = 1;
if (nftType == uint256(2)) {
bonus = 15;
}
if (nftType == uint256(4)) {
bonus = 75;
}
if (nftType == uint256(8)) {
bonus = 150;
}
uint256 result = (amount * bonus) / 100;
return result;
}
/**
* @dev Private implementation of staking methods.
* @param staker User address who deposits tokens to stake.
* @param beneficiary User address who gains credit for this stake operation.
* @param amount Number of deposit tokens to stake.
*/
function _stakeFor(
address staker,
address beneficiary,
uint256 amount,
int256 nftId
) private {
require(amount > 0, "TokenGeyser: stake amount is zero");
require(
beneficiary != address(0),
"TokenGeyser: beneficiary is zero address"
);
require(
totalStakingShares == 0 || totalStaked() > 0,
"TokenGeyser: Invalid state. Staking shares exist, but no staking tokens do"
);
uint256 sentAmount = 0;
sentAmount += amount;
uint256 extra = getNftBoost(beneficiary, amount, nftId);
originalAmounts[beneficiary] += amount;
extraAmounts[beneficiary] += extra;
amount += extra;
uint256 mintedStakingShares =
(totalStakingShares > 0)
? totalStakingShares.mul(amount).div(totalStaked())
: amount.mul(_initialSharesPerToken);
totalExtra += extra;
require(
mintedStakingShares > 0,
"TokenGeyser: Stake amount is too small"
);
updateAccounting(beneficiary);
// 1. User Accounting
UserTotals storage totals = _userTotals[beneficiary];
totals.stakingShares = totals.stakingShares.add(mintedStakingShares);
totals.lastAccountingTimestampSec = now;
Stake memory newStake = Stake(mintedStakingShares, now);
_userStakes[beneficiary].push(newStake);
// 2. Global Accounting
totalStakingShares = totalStakingShares.add(mintedStakingShares);
// Already set in updateAccounting()
// _lastAccountingTimestampSec = now;
// interactions
require(
_stakingPool.token().transferFrom(
staker,
address(_stakingPool),
sentAmount
),
"TokenGeyser: transfer into staking pool failed"
);
emit Staked(beneficiary, sentAmount, totalStakedFor(beneficiary), "");
}
/**
* @dev Unstakes a certain amount of previously deposited tokens. User also receives their
* alotted number of distribution tokens.
* @param amount Number of deposit tokens to unstake / withdraw.
* @param data Not used.
*/
function unstake(address staker, uint256 amount, bytes calldata data) external override {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
_unstake(staker, amount);
}
/**
* @param amount Number of deposit tokens to unstake / withdraw.
* @return The total number of distribution tokens that would be rewarded.
*/
function unstakeQuery(address staker, uint256 amount) public returns (uint256) {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
return _unstake(staker, amount);
}
/**
* @dev Unstakes a certain amount of previously deposited tokens. User also receives their
* alotted number of distribution tokens.
* @param amount Number of deposit tokens to unstake / withdraw.
* @return The total number of distribution tokens rewarded.
*/
function _unstake(address user, uint256 amount) private returns (uint256) {
updateAccounting(user);
// checks
require(amount == 0, "TokenGeyser: only full unstake is allowed");
amount = originalAmounts[user] + extraAmounts[user];
uint256 stakingSharesToBurn =
totalStakingShares.mul(amount).div(totalStaked());
require(
stakingSharesToBurn > 0,
"TokenGeyser: Unable to unstake amount this small"
);
// 1. User Accounting
UserTotals storage totals = _userTotals[user];
Stake[] storage accountStakes = _userStakes[user];
// Redeem from most recent stake and go backwards in time.
uint256 stakingShareSecondsToBurn = 0;
uint256 sharesLeftToBurn = stakingSharesToBurn;
uint256 rewardAmount = 0;
while (sharesLeftToBurn > 0) {
Stake storage lastStake = accountStakes[accountStakes.length - 1];
uint256 stakeTimeSec = now.sub(lastStake.timestampSec);
uint256 newStakingShareSecondsToBurn = 0;
if (lastStake.stakingShares <= sharesLeftToBurn) {
newStakingShareSecondsToBurn = lastStake.stakingShares.mul(
stakeTimeSec
);
rewardAmount = computeNewReward(
rewardAmount,
newStakingShareSecondsToBurn,
stakeTimeSec
);
stakingShareSecondsToBurn = stakingShareSecondsToBurn.add(
newStakingShareSecondsToBurn
);
sharesLeftToBurn = sharesLeftToBurn.sub(
lastStake.stakingShares
);
accountStakes.pop();
} else {
newStakingShareSecondsToBurn = sharesLeftToBurn.mul(
stakeTimeSec
);
rewardAmount = computeNewReward(
rewardAmount,
newStakingShareSecondsToBurn,
stakeTimeSec
);
stakingShareSecondsToBurn = stakingShareSecondsToBurn.add(
newStakingShareSecondsToBurn
);
lastStake.stakingShares = lastStake.stakingShares.sub(
sharesLeftToBurn
);
sharesLeftToBurn = 0;
}
}
totals.stakingShareSeconds = totals.stakingShareSeconds.sub(
stakingShareSecondsToBurn
);
totals.stakingShares = totals.stakingShares.sub(stakingSharesToBurn);
// Already set in updateAccounting
// totals.lastAccountingTimestampSec = now;
// 2. Global Accounting
_totalStakingShareSeconds = _totalStakingShareSeconds.sub(
stakingShareSecondsToBurn
);
totalStakingShares = totalStakingShares.sub(stakingSharesToBurn);
// Already set in updateAccounting
// _lastAccountingTimestampSec = now;
// interactions
require(
_stakingPool.transfer(user, originalAmounts[user]),
"TokenGeyser: transfer out of staking pool failed"
);
//in case rescueRewards was called, there are no rewards to be transfered
if (totalUnlocked() >= rewardAmount) {
require(
_unlockedPool.transfer(user, rewardAmount),
"TokenGeyser: transfer out of unlocked pool failed"
);
emit TokensClaimed(user, rewardAmount);
userEarnings[user] += rewardAmount;
}
emit Unstaked(user, amount, totalStakedFor(user), "");
require(
totalStakingShares == 0 || totalStaked() > 0,
"TokenGeyser: Error unstaking. Staking shares exist, but no staking tokens do"
);
totalExtra -= extraAmounts[user];
originalAmounts[user] = 0;
extraAmounts[user] = 0;
return rewardAmount;
}
/**
* @dev Applies an additional time-bonus to a distribution amount. This is necessary to
* encourage long-term deposits instead of constant unstake/restakes.
* The bonus-multiplier is the result of a linear function that starts at startBonus and
* ends at 100% over bonusPeriodSec, then stays at 100% thereafter.
* @param currentRewardTokens The current number of distribution tokens already alotted for this
* unstake op. Any bonuses are already applied.
* @param stakingShareSeconds The stakingShare-seconds that are being burned for new
* distribution tokens.
* @param stakeTimeSec Length of time for which the tokens were staked. Needed to calculate
* the time-bonus.
* @return Updated amount of distribution tokens to award, with any bonus included on the
* newly added tokens.
*/
function computeNewReward(
uint256 currentRewardTokens,
uint256 stakingShareSeconds,
uint256 stakeTimeSec
) private view returns (uint256) {
uint256 newRewardTokens =
totalUnlocked().mul(stakingShareSeconds).div(
_totalStakingShareSeconds
);
if (stakeTimeSec >= bonusPeriodSec) {
return currentRewardTokens.add(newRewardTokens);
}
uint256 oneHundredPct = 10**bonusDecimals;
uint256 bonusedReward =
startBonus
.add(
oneHundredPct.sub(startBonus).mul(stakeTimeSec).div(
bonusPeriodSec
)
)
.mul(newRewardTokens)
.div(oneHundredPct);
return currentRewardTokens.add(bonusedReward);
}
/**
* @param addr The user to look up staking information for.
* @return The number of staking tokens deposited for addr.
*/
function totalStakedFor(address addr)
public
view
override
returns (uint256)
{
uint256 amountWithExtra =
totalStakingShares > 0
? totalStaked().mul(_userTotals[addr].stakingShares).div(
totalStakingShares
)
: 0;
if (amountWithExtra == 0) return amountWithExtra;
return amountWithExtra - extraAmounts[addr];
}
/**
* @return The total number of deposit tokens staked globally, by all users.
*/
function totalStaked() public view override returns (uint256) {
return _stakingPool.balance() + totalExtra;
}
/**
* @dev Note that this application has a staking token as well as a distribution token, which
* may be different. This function is required by EIP-900.
* @return The deposit token used for staking.
*/
function token() external view override returns (address) {
return address(getStakingToken());
}
/**
* @dev A globally callable function to update the accounting state of the system.
* Global state and state for the caller are updated.
* @return [0] balance of the locked pool
* @return [1] balance of the unlocked pool
* @return [2] caller's staking share seconds
* @return [3] global staking share seconds
* @return [4] Rewards caller has accumulated, optimistically assumes max time-bonus.
* @return [5] block timestamp
*/
function updateAccounting(address user)
public
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
_unlockTokens();
// Global accounting
uint256 newStakingShareSeconds =
now.sub(_lastAccountingTimestampSec).mul(totalStakingShares);
_totalStakingShareSeconds = _totalStakingShareSeconds.add(
newStakingShareSeconds
);
_lastAccountingTimestampSec = now;
// User Accounting
UserTotals storage totals = _userTotals[user];
uint256 newUserStakingShareSeconds =
now.sub(totals.lastAccountingTimestampSec).mul(
totals.stakingShares
);
totals.stakingShareSeconds = totals.stakingShareSeconds.add(
newUserStakingShareSeconds
);
totals.lastAccountingTimestampSec = now;
uint256 totalUserRewards =
(_totalStakingShareSeconds > 0)
? totalUnlocked().mul(totals.stakingShareSeconds).div(
_totalStakingShareSeconds
)
: 0;
return (
totalLocked(),
totalUnlocked(),
totals.stakingShareSeconds,
_totalStakingShareSeconds,
totalUserRewards,
now
);
}
/**
* @return Total number of locked distribution tokens.
*/
function totalLocked() public view returns (uint256) {
return _lockedPool.balance();
}
/**
* @return Total number of unlocked distribution tokens.
*/
function totalUnlocked() public view returns (uint256) {
return _unlockedPool.balance();
}
/**
* @return Number of unlock schedules.
*/
function unlockScheduleCount() public view returns (uint256) {
return unlockSchedules.length;
}
/**
* @dev This funcion allows the contract owner to add more locked distribution tokens, along
* with the associated "unlock schedule". These locked tokens immediately begin unlocking
* linearly over the duraction of durationSec timeframe.
* @param amount Number of distribution tokens to lock. These are transferred from the caller.
* @param durationSec Length of time to linear unlock the tokens.
*/
function lockTokens(uint256 amount, uint256 durationSec)
external
onlyOwner
{
require(
unlockSchedules.length < _maxUnlockSchedules,
"TokenGeyser: reached maximum unlock schedules"
);
// Update lockedTokens amount before using it in computations after.
updateAccounting(msg.sender);
uint256 lockedTokens = totalLocked();
uint256 mintedLockedShares =
(lockedTokens > 0)
? totalLockedShares.mul(amount).div(lockedTokens)
: amount.mul(_initialSharesPerToken);
UnlockSchedule memory schedule;
schedule.initialLockedShares = mintedLockedShares;
schedule.lastUnlockTimestampSec = now;
schedule.endAtSec = now.add(durationSec);
schedule.durationSec = durationSec;
unlockSchedules.push(schedule);
totalLockedShares = totalLockedShares.add(mintedLockedShares);
require(
_lockedPool.token().transferFrom(
msg.sender,
address(_lockedPool),
amount
),
"TokenGeyser: transfer into locked pool failed"
);
emit TokensLocked(amount, durationSec, totalLocked());
}
/**
* @dev Moves distribution tokens from the locked pool to the unlocked pool, according to the
* previously defined unlock schedules. Publicly callable.
* @return Number of newly unlocked distribution tokens.
*/
function unlockTokens() public onlyOwner returns (uint256) {
_unlockTokens();
}
function _unlockTokens() private returns (uint256) {
uint256 unlockedTokens = 0;
uint256 lockedTokens = totalLocked();
if (totalLockedShares == 0) {
unlockedTokens = lockedTokens;
} else {
uint256 unlockedShares = 0;
for (uint256 s = 0; s < unlockSchedules.length; s++) {
unlockedShares = unlockedShares.add(unlockScheduleShares(s));
}
unlockedTokens = unlockedShares.mul(lockedTokens).div(
totalLockedShares
);
totalLockedShares = totalLockedShares.sub(unlockedShares);
}
if (unlockedTokens > 0) {
require(
_lockedPool.transfer(address(_unlockedPool), unlockedTokens),
"TokenGeyser: transfer out of locked pool failed"
);
emit TokensUnlocked(unlockedTokens, totalLocked());
}
return unlockedTokens;
}
/**
* @dev Returns the number of unlockable shares from a given schedule. The returned value
* depends on the time since the last unlock. This function updates schedule accounting,
* but does not actually transfer any tokens.
* @param s Index of the unlock schedule.
* @return The number of unlocked shares.
*/
function unlockScheduleShares(uint256 s) private returns (uint256) {
UnlockSchedule storage schedule = unlockSchedules[s];
if (schedule.unlockedShares >= schedule.initialLockedShares) {
return 0;
}
uint256 sharesToUnlock = 0;
// Special case to handle any leftover dust from integer division
if (now >= schedule.endAtSec) {
sharesToUnlock = (
schedule.initialLockedShares.sub(schedule.unlockedShares)
);
schedule.lastUnlockTimestampSec = schedule.endAtSec;
} else {
sharesToUnlock = now
.sub(schedule.lastUnlockTimestampSec)
.mul(schedule.initialLockedShares)
.div(schedule.durationSec);
schedule.lastUnlockTimestampSec = now;
}
schedule.unlockedShares = schedule.unlockedShares.add(sharesToUnlock);
return sharesToUnlock;
}
/**
* @dev Lets the owner rescue funds air-dropped to the staking pool.
* @param tokenToRescue Address of the token to be rescued.
* @param to Address to which the rescued funds are to be sent.
* @param amount Amount of tokens to be rescued.
* @return Transfer success.
*/
function rescueFundsFromStakingPool(
address tokenToRescue,
address to,
uint256 amount
) public onlyOwner returns (bool) {
return _stakingPool.rescueFunds(tokenToRescue, to, amount);
}
function supportsHistory() external pure override returns (bool) {
return false;
}
}
// SPDX-License-Identifier: MIT
/**
* @title Staking interface, as defined by EIP-900.
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-900.md
*/
interface IStake {
function stake(
address staker,
uint256 amount,
bytes calldata data
) external;
function stakeFor(
address staker,
address user,
uint256 amount,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
/**
* @title Non Nft Token Geyser
* @dev A smart-contract based mechanism to distribute tokens over time, inspired loosely by
* Compound and Uniswap.
*
* Distribution tokens are added to a locked pool in the contract and become unlocked over time
* according to a once-configurable unlock schedule. Once unlocked, they are available to be
* claimed by users.
*
* A user may deposit tokens to accrue ownership share over the unlocked pool. This owner share
* is a function of the number of tokens deposited as well as the length of time deposited.
* Specifically, a user's share of the currently-unlocked pool equals their "deposit-seconds"
* divided by the global "deposit-seconds". This aligns the new token distribution with long
* term supporters of the project, addressing one of the major drawbacks of simple airdrops.
*
* More background and motivation available at:
* https://github.com/ampleforth/RFCs/blob/master/RFCs/rfc-1.md
*/
contract TokenGeyserWithoutNFT is IStaking, IStake, Ownable {
using SafeMath for uint256;
event Staked(
address indexed user,
uint256 amount,
uint256 total,
bytes data
);
event Unstaked(
address indexed user,
uint256 amount,
uint256 total,
bytes data
);
event TokensClaimed(address indexed user, uint256 amount);
event TokensLocked(uint256 amount, uint256 durationSec, uint256 total);
// amount: Unlocked tokens, total: Total locked tokens
event TokensUnlocked(uint256 amount, uint256 total);
TokenPool private _stakingPool;
TokenPool private _unlockedPool;
TokenPool private _lockedPool;
//
// Time-bonus params
//
uint256 public bonusDecimals = 2;
uint256 public startBonus = 0;
uint256 public bonusPeriodSec = 0;
//
// Global accounting state
//
uint256 public totalLockedShares = 0;
uint256 public totalStakingShares = 0;
uint256 private _totalStakingShareSeconds = 0;
uint256 private _lastAccountingTimestampSec = now;
uint256 private _maxUnlockSchedules = 0;
uint256 private _initialSharesPerToken = 0;
//
// User accounting state
//
// Represents a single stake for a user. A user may have multiple.
struct Stake {
uint256 stakingShares;
uint256 timestampSec;
}
// Caches aggregated values from the User->Stake[] map to save computation.
// If lastAccountingTimestampSec is 0, there's no entry for that user.
struct UserTotals {
uint256 stakingShares;
uint256 stakingShareSeconds;
uint256 lastAccountingTimestampSec;
}
// Aggregated staking values per user
mapping(address => UserTotals) private _userTotals;
// The collection of stakes for each user. Ordered by timestamp, earliest to latest.
mapping(address => Stake[]) private _userStakes;
mapping(address => uint256) userEarnings;
//
// Locked/Unlocked Accounting state
//
struct UnlockSchedule {
uint256 initialLockedShares;
uint256 unlockedShares;
uint256 lastUnlockTimestampSec;
uint256 endAtSec;
uint256 durationSec;
}
UnlockSchedule[] public unlockSchedules;
address public geyserManager;
/**
* @param stakingToken The token users deposit as stake.
* @param distributionToken The token users receive as they unstake.
* @param maxUnlockSchedules Max number of unlock stages, to guard against hitting gas limit.
* @param startBonus_ Starting time bonus
* e.g. 25% means user gets 25% of max distribution tokens.
* @param bonusPeriodSec_ Length of time for bonus to increase linearly to max.
* @param initialSharesPerToken Number of shares to mint per staking token on first stake.
* @param bonusDecimals_ The number of decimals for shares
*/
constructor(
IERC20 stakingToken,
IERC20 distributionToken,
uint256 maxUnlockSchedules,
uint256 startBonus_,
uint256 bonusPeriodSec_,
uint256 initialSharesPerToken,
uint256 bonusDecimals_,
address managerAddress
) public {
// The start bonus must be some fraction of the max. (i.e. <= 100%)
require(
startBonus_ <= 10**bonusDecimals_,
"TokenGeyser: start bonus too high"
);
// If no period is desired, instead set startBonus = 100%
// and bonusPeriod to a small value like 1sec.
require(bonusPeriodSec_ != 0, "TokenGeyser: bonus period is zero");
require(
initialSharesPerToken > 0,
"TokenGeyser: initialSharesPerToken is zero"
);
require(bonusDecimals_ > 0, "TokenGeyser: bonusDecimals_ is zero");
_stakingPool = new TokenPool(stakingToken);
_unlockedPool = new TokenPool(distributionToken);
_lockedPool = new TokenPool(distributionToken);
_unlockedPool.setRescuable(true);
geyserManager = managerAddress;
startBonus = startBonus_;
bonusDecimals = bonusDecimals_;
bonusPeriodSec = bonusPeriodSec_;
_maxUnlockSchedules = maxUnlockSchedules;
_initialSharesPerToken = initialSharesPerToken;
}
/**
* @return Total earnings for a user
*/
function getEarnings(address user) public view returns (uint256) {
return userEarnings[user];
}
/**
* @dev Rescue rewards
*/
function rescueRewards(address user) external onlyOwner {
require(totalUnlocked() > 0, "TokenGeyser: Nothing to rescue");
require(
_unlockedPool.transfer(user, _unlockedPool.balance()),
"TokenGeyser: rescue rewards from rewards pool failed"
);
}
/**
* @return The token users deposit as stake.
*/
function getStakingToken() public view returns (IERC20) {
return _stakingPool.token();
}
/**
* @return The token users receive as they unstake.
*/
function getDistributionToken() public view returns (IERC20) {
assert(_unlockedPool.token() == _lockedPool.token());
return _unlockedPool.token();
}
event log(string s);
event log(uint256 s);
event log(address s);
/**
* @dev Transfers amount of deposit tokens from the user.
* @param amount Number of deposit tokens to stake.
* @param data Not used.
*/
function stake(
address staker,
uint256 amount,
bytes calldata data
) external override {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
_stakeFor(staker, staker, amount);
}
/**
* @dev Transfers amount of deposit tokens from the caller on behalf of user.
* @param user User address who gains credit for this stake operation.
* @param amount Number of deposit tokens to stake.
* @param data Not used.
*/
function stakeFor(
address staker,
address user,
uint256 amount,
bytes calldata data
) external override onlyOwner {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
_stakeFor(staker, user, amount);
}
/**
* @dev Private implementation of staking methods.
* @param staker User address who deposits tokens to stake.
* @param beneficiary User address who gains credit for this stake operation.
* @param amount Number of deposit tokens to stake.
*/
function _stakeFor(
address staker,
address beneficiary,
uint256 amount
) private {
require(amount > 0, "TokenGeyser: stake amount is zero");
require(
beneficiary != address(0),
"TokenGeyser: beneficiary is zero address"
);
require(
totalStakingShares == 0 || totalStaked() > 0,
"TokenGeyser: Invalid state. Staking shares exist, but no staking tokens do"
);
uint256 mintedStakingShares =
(totalStakingShares > 0)
? totalStakingShares.mul(amount).div(totalStaked())
: amount.mul(_initialSharesPerToken);
require(
mintedStakingShares > 0,
"TokenGeyser: Stake amount is too small"
);
updateAccounting(beneficiary);
// 1. User Accounting
UserTotals storage totals = _userTotals[beneficiary];
totals.stakingShares = totals.stakingShares.add(mintedStakingShares);
totals.lastAccountingTimestampSec = now;
Stake memory newStake = Stake(mintedStakingShares, now);
_userStakes[beneficiary].push(newStake);
// 2. Global Accounting
totalStakingShares = totalStakingShares.add(mintedStakingShares);
// Already set in updateAccounting()
// _lastAccountingTimestampSec = now;
// interactions
require(
_stakingPool.token().transferFrom(
staker,
address(_stakingPool),
amount
),
"TokenGeyser: transfer into staking pool failed"
);
emit Staked(beneficiary, amount, totalStakedFor(beneficiary), "");
}
/**
* @dev Unstakes a certain amount of previously deposited tokens. User also receives their
* alotted number of distribution tokens.
* @param amount Number of deposit tokens to unstake / withdraw.
* @param data Not used.
*/
function unstake(
address staker,
uint256 amount,
bytes calldata data
) external override {
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
_unstake(staker, amount);
}
/**
* @param amount Number of deposit tokens to unstake / withdraw.
* @return The total number of distribution tokens that would be rewarded.
*/
function unstakeQuery(address staker, uint256 amount)
public
returns (uint256)
{
require(
geyserManager == msg.sender,
"This method can be called by the geyser manager only"
);
return _unstake(staker, amount);
}
/**
* @dev Unstakes a certain amount of previously deposited tokens. User also receives their
* alotted number of distribution tokens.
* @param amount Number of deposit tokens to unstake / withdraw.
* @return The total number of distribution tokens rewarded.
*/
function _unstake(address user, uint256 amount) private returns (uint256) {
updateAccounting(user);
uint256 stakingSharesToBurn =
totalStakingShares.mul(amount).div(totalStaked());
require(
stakingSharesToBurn > 0,
"TokenGeyser: Unable to unstake amount this small"
);
// 1. User Accounting
UserTotals storage totals = _userTotals[user];
Stake[] storage accountStakes = _userStakes[user];
// Redeem from most recent stake and go backwards in time.
uint256 stakingShareSecondsToBurn = 0;
uint256 sharesLeftToBurn = stakingSharesToBurn;
uint256 rewardAmount = 0;
while (sharesLeftToBurn > 0) {
Stake storage lastStake = accountStakes[accountStakes.length - 1];
uint256 stakeTimeSec = now.sub(lastStake.timestampSec);
uint256 newStakingShareSecondsToBurn = 0;
if (lastStake.stakingShares <= sharesLeftToBurn) {
newStakingShareSecondsToBurn = lastStake.stakingShares.mul(
stakeTimeSec
);
rewardAmount = computeNewReward(
rewardAmount,
newStakingShareSecondsToBurn,
stakeTimeSec
);
stakingShareSecondsToBurn = stakingShareSecondsToBurn.add(
newStakingShareSecondsToBurn
);
sharesLeftToBurn = sharesLeftToBurn.sub(
lastStake.stakingShares
);
accountStakes.pop();
} else {
newStakingShareSecondsToBurn = sharesLeftToBurn.mul(
stakeTimeSec
);
rewardAmount = computeNewReward(
rewardAmount,
newStakingShareSecondsToBurn,
stakeTimeSec
);
stakingShareSecondsToBurn = stakingShareSecondsToBurn.add(
newStakingShareSecondsToBurn
);
lastStake.stakingShares = lastStake.stakingShares.sub(
sharesLeftToBurn
);
sharesLeftToBurn = 0;
}
}
totals.stakingShareSeconds = totals.stakingShareSeconds.sub(
stakingShareSecondsToBurn
);
totals.stakingShares = totals.stakingShares.sub(stakingSharesToBurn);
// Already set in updateAccounting
// totals.lastAccountingTimestampSec = now;
// 2. Global Accounting
_totalStakingShareSeconds = _totalStakingShareSeconds.sub(
stakingShareSecondsToBurn
);
totalStakingShares = totalStakingShares.sub(stakingSharesToBurn);
// Already set in updateAccountingF
// _lastAccountingTimestampSec = now;
// interactions
require(
_stakingPool.transfer(user, amount),
"TokenGeyser: transfer out of staking pool failed"
);
//in case rescueRewards was called, there are no rewards to be transfered
if (totalUnlocked() >= rewardAmount) {
require(
_unlockedPool.transfer(user, rewardAmount),
"TokenGeyser: transfer out of unlocked pool failed"
);
emit TokensClaimed(user, rewardAmount);
userEarnings[user] += rewardAmount;
}
emit Unstaked(user, amount, totalStakedFor(user), "");
require(
totalStakingShares == 0 || totalStaked() > 0,
"TokenGeyser: Error unstaking. Staking shares exist, but no staking tokens do"
);
return rewardAmount;
}
/**
* @dev Applies an additional time-bonus to a distribution amount. This is necessary to
* encourage long-term deposits instead of constant unstake/restakes.
* The bonus-multiplier is the result of a linear function that starts at startBonus and
* ends at 100% over bonusPeriodSec, then stays at 100% thereafter.
* @param currentRewardTokens The current number of distribution tokens already alotted for this
* unstake op. Any bonuses are already applied.
* @param stakingShareSeconds The stakingShare-seconds that are being burned for new
* distribution tokens.
* @param stakeTimeSec Length of time for which the tokens were staked. Needed to calculate
* the time-bonus.
* @return Updated amount of distribution tokens to award, with any bonus included on the
* newly added tokens.
*/
function computeNewReward(
uint256 currentRewardTokens,
uint256 stakingShareSeconds,
uint256 stakeTimeSec
) private view returns (uint256) {
uint256 newRewardTokens =
totalUnlocked().mul(stakingShareSeconds).div(
_totalStakingShareSeconds
);
if (stakeTimeSec >= bonusPeriodSec) {
return currentRewardTokens.add(newRewardTokens);
}
uint256 oneHundredPct = 10**bonusDecimals;
uint256 bonusedReward =
startBonus
.add(
oneHundredPct.sub(startBonus).mul(stakeTimeSec).div(
bonusPeriodSec
)
)
.mul(newRewardTokens)
.div(oneHundredPct);
return currentRewardTokens.add(bonusedReward);
}
/**
* @param addr The user to look up staking information for.
* @return The number of staking tokens deposited for addr.
*/
function totalStakedFor(address addr)
public
view
override
returns (uint256)
{
return
totalStakingShares > 0
? totalStaked().mul(_userTotals[addr].stakingShares).div(
totalStakingShares
)
: 0;
}
/**
* @return The total number of deposit tokens staked globally, by all users.
*/
function totalStaked() public view override returns (uint256) {
return _stakingPool.balance();
}
/**
* @dev Note that this application has a staking token as well as a distribution token, which
* may be different. This function is required by EIP-900.
* @return The deposit token used for staking.
*/
function token() external view override returns (address) {
return address(getStakingToken());
}
/**
* @dev A globally callable function to update the accounting state of the system.
* Global state and state for the caller are updated.
* @return [0] balance of the locked pool
* @return [1] balance of the unlocked pool
* @return [2] caller's staking share seconds
* @return [3] global staking share seconds
* @return [4] Rewards caller has accumulated, optimistically assumes max time-bonus.
* @return [5] block timestamp
*/
function updateAccounting(address user)
public
returns (
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
_unlockTokens();
// Global accounting
uint256 newStakingShareSeconds =
now.sub(_lastAccountingTimestampSec).mul(totalStakingShares);
_totalStakingShareSeconds = _totalStakingShareSeconds.add(
newStakingShareSeconds
);
_lastAccountingTimestampSec = now;
// User Accounting
UserTotals storage totals = _userTotals[user];
uint256 newUserStakingShareSeconds =
now.sub(totals.lastAccountingTimestampSec).mul(
totals.stakingShares
);
totals.stakingShareSeconds = totals.stakingShareSeconds.add(
newUserStakingShareSeconds
);
totals.lastAccountingTimestampSec = now;
uint256 totalUserRewards =
(_totalStakingShareSeconds > 0)
? totalUnlocked().mul(totals.stakingShareSeconds).div(
_totalStakingShareSeconds
)
: 0;
return (
totalLocked(),
totalUnlocked(),
totals.stakingShareSeconds,
_totalStakingShareSeconds,
totalUserRewards,
now
);
}
/**
* @return Total number of locked distribution tokens.
*/
function totalLocked() public view returns (uint256) {
return _lockedPool.balance();
}
/**
* @return Total number of unlocked distribution tokens.
*/
function totalUnlocked() public view returns (uint256) {
return _unlockedPool.balance();
}
/**
* @return Number of unlock schedules.
*/
function unlockScheduleCount() public view returns (uint256) {
return unlockSchedules.length;
}
/**
* @dev This funcion allows the contract owner to add more locked distribution tokens, along
* with the associated "unlock schedule". These locked tokens immediately begin unlocking
* linearly over the duraction of durationSec timeframe.
* @param amount Number of distribution tokens to lock. These are transferred from the caller.
* @param durationSec Length of time to linear unlock the tokens.
*/
function lockTokens(uint256 amount, uint256 durationSec)
external
onlyOwner
{
require(
unlockSchedules.length < _maxUnlockSchedules,
"TokenGeyser: reached maximum unlock schedules"
);
// Update lockedTokens amount before using it in computations after.
updateAccounting(msg.sender);
uint256 lockedTokens = totalLocked();
uint256 mintedLockedShares =
(lockedTokens > 0)
? totalLockedShares.mul(amount).div(lockedTokens)
: amount.mul(_initialSharesPerToken);
UnlockSchedule memory schedule;
schedule.initialLockedShares = mintedLockedShares;
schedule.lastUnlockTimestampSec = now;
schedule.endAtSec = now.add(durationSec);
schedule.durationSec = durationSec;
unlockSchedules.push(schedule);
totalLockedShares = totalLockedShares.add(mintedLockedShares);
require(
_lockedPool.token().transferFrom(
msg.sender,
address(_lockedPool),
amount
),
"TokenGeyser: transfer into locked pool failed"
);
emit TokensLocked(amount, durationSec, totalLocked());
}
/**
* @dev Moves distribution tokens from the locked pool to the unlocked pool, according to the
* previously defined unlock schedules. Publicly callable.
* @return Number of newly unlocked distribution tokens.
*/
function unlockTokens() public onlyOwner returns (uint256) {
_unlockTokens();
}
function _unlockTokens() private returns (uint256) {
uint256 unlockedTokens = 0;
uint256 lockedTokens = totalLocked();
if (totalLockedShares == 0) {
unlockedTokens = lockedTokens;
} else {
uint256 unlockedShares = 0;
for (uint256 s = 0; s < unlockSchedules.length; s++) {
unlockedShares = unlockedShares.add(unlockScheduleShares(s));
}
unlockedTokens = unlockedShares.mul(lockedTokens).div(
totalLockedShares
);
totalLockedShares = totalLockedShares.sub(unlockedShares);
}
if (unlockedTokens > 0) {
require(
_lockedPool.transfer(address(_unlockedPool), unlockedTokens),
"TokenGeyser: transfer out of locked pool failed"
);
emit TokensUnlocked(unlockedTokens, totalLocked());
}
return unlockedTokens;
}
/**
* @dev Returns the number of unlockable shares from a given schedule. The returned value
* depends on the time since the last unlock. This function updates schedule accounting,
* but does not actually transfer any tokens.
* @param s Index of the unlock schedule.
* @return The number of unlocked shares.
*/
function unlockScheduleShares(uint256 s) private returns (uint256) {
UnlockSchedule storage schedule = unlockSchedules[s];
if (schedule.unlockedShares >= schedule.initialLockedShares) {
return 0;
}
uint256 sharesToUnlock = 0;
// Special case to handle any leftover dust from integer division
if (now >= schedule.endAtSec) {
sharesToUnlock = (
schedule.initialLockedShares.sub(schedule.unlockedShares)
);
schedule.lastUnlockTimestampSec = schedule.endAtSec;
} else {
sharesToUnlock = now
.sub(schedule.lastUnlockTimestampSec)
.mul(schedule.initialLockedShares)
.div(schedule.durationSec);
schedule.lastUnlockTimestampSec = now;
}
schedule.unlockedShares = schedule.unlockedShares.add(sharesToUnlock);
return sharesToUnlock;
}
/**
* @dev Lets the owner rescue funds air-dropped to the staking pool.
* @param tokenToRescue Address of the token to be rescued.
* @param to Address to which the rescued funds are to be sent.
* @param amount Amount of tokens to be rescued.
* @return Transfer success.
*/
function rescueFundsFromStakingPool(
address tokenToRescue,
address to,
uint256 amount
) public onlyOwner returns (bool) {
return _stakingPool.rescueFunds(tokenToRescue, to, amount);
}
function supportsHistory() external pure override returns (bool) {
return false;
}
}
// SPDX-License-Identifier: MIT
/** @title Token Geyser Manager */
contract TokenGeyserManager is Ownable, ITokenGeyserManager {
bool public hasNFTBonus;
mapping(address => address) public geysers;
address[] public tokens;
/**
@dev Creates an empty Geyser token managers
*/
constructor(bool _hasNftBonus) public {
hasNFTBonus = _hasNftBonus;
emit GeyserManagerCreated(msg.sender, address(this));
}
/**
@dev Adds a new geyser in the team
@param token - address of the staking token for which the geyser was created
@param geyser - address of the geyser
*/
function addGeyser(address token, address geyser)
public
override
onlyOwner
returns (bool)
{
require(token != address(0), "TokenGeyserManager: token is invalid");
require(geyser != address(0), "TokenGeyserManager: geyser is invalid");
tokens.push(token);
geysers[token] = geyser;
emit GeyserAdded(msg.sender, geyser, token);
return true;
}
/**
@dev Retrieves total rewards earned for a specific staking token
@param token - address of the ERC20 token
*/
function getEarned(address token) public view override returns (uint256) {
if (hasNFTBonus) {
return TokenGeyser(geysers[token]).getEarnings(msg.sender);
}
return TokenGeyserWithoutNFT(geysers[token]).getEarnings(msg.sender);
}
/**
@dev Retrieves total rewards earned for all the staking tokens
*/
function getEarnings() public view override returns (address[] memory, uint256[] memory){
address[] memory addresses = new address[](tokens.length);
uint256[] memory amounts = new uint256[](tokens.length);
for (uint8 i = 0; i < tokens.length; i++) {
addresses[i] = tokens[i];
if (hasNFTBonus) {
amounts[i] = TokenGeyser(geysers[tokens[i]]).getEarnings(
msg.sender
);
} else {
amounts[i] = TokenGeyserWithoutNFT(geysers[tokens[i]])
.getEarnings(msg.sender);
}
}
return (addresses, amounts);
}
/**
@dev Retrieves staked amount for a specific token address
@param token - address of the ERC20 token
*/
function getStake(address token) public view override returns (uint256) {
if (hasNFTBonus) {
return TokenGeyser(geysers[token]).totalStakedFor(msg.sender);
}
return TokenGeyserWithoutNFT(geysers[token]).totalStakedFor(msg.sender);
}
/**
@dev Retrieves all stakes for sender
*/
function getStakes()
public
view
override
returns (address[] memory, uint256[] memory)
{
address[] memory addresses = new address[](tokens.length);
uint256[] memory amounts = new uint256[](tokens.length);
for (uint8 i = 0; i < tokens.length; i++) {
addresses[i] = tokens[i];
if (hasNFTBonus) {
amounts[i] = TokenGeyser(geysers[tokens[i]]).totalStakedFor(
msg.sender
);
} else {
amounts[i] = TokenGeyserWithoutNFT(geysers[tokens[i]])
.totalStakedFor(msg.sender);
}
}
return (addresses, amounts);
}
/**
@dev Stakes all tokens sent
@param _tokens - array of tokens' addresses you want to stake
@param amounts - stake amount you want for each token
*/
function stake(
address[] calldata _tokens,
uint256[] calldata amounts,
int256 nftId
) external override returns (bool) {
//validation
require(tokens.length > 0, "TokenGeyserManager: _tokens is empty");
require(amounts.length > 0, "TokenGeyserManager: amounts is empty");
require(
_tokens.length == amounts.length,
"TokenGeyserManager: tokens and amounts need to be the same length"
);
for (uint8 i = 0; i < _tokens.length; i++) {
ERC20 currentToken = ERC20(_tokens[i]);
uint256 currentTokenBalance = currentToken.balanceOf(msg.sender);
uint256 sentAmount = amounts[i];
string memory tokenName = currentToken.name();
require(
currentTokenBalance >= sentAmount,
string(
abi.encodePacked(
"TokenGeyserManager: Token ",
tokenName,
" balance is lower than the amount sent"
)
)
);
}
//actions
for (uint8 i = 0; i < _tokens.length; i++) {
if (hasNFTBonus) {
TokenGeyser(geysers[_tokens[i]]).stake(
msg.sender,
amounts[i],
"",
nftId
);
} else {
TokenGeyserWithoutNFT(geysers[_tokens[i]]).stake(
msg.sender,
amounts[i],
""
);
}
emit Staked(msg.sender, tokens[i], amounts[i]);
}
return true;
}
/**
@dev Unstakes all tokens sent
@param _tokens - array of tokens' addresses you want to unstake
@param amounts - unstake amount you want for each token
*/
function unstake(address[] calldata _tokens, uint256[] calldata amounts)
external
override
{
//validation
require(tokens.length > 0, "TokenGeyserManager: _tokens is empty");
require(amounts.length > 0, "TokenGeyserManager: amounts is empty");
require(
_tokens.length == amounts.length,
"TokenGeyserManager: tokens and amounts need to be the same length"
);
for (uint8 i = 0; i < _tokens.length; i++) {
if (hasNFTBonus) {
require(
amounts[i] == 0,
"TokenGeyserManager: only full unstake is allowed"
);
TokenGeyser(geysers[_tokens[i]]).unstake(
msg.sender,
amounts[i],
""
);
} else {
TokenGeyserWithoutNFT(geysers[_tokens[i]]).unstake(
msg.sender,
amounts[i],
""
);
}
emit Unstaked(msg.sender, _tokens[i], amounts[i]);
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000000000000000000000000000000000000000001
-----Decoded View---------------
Arg [0] : _hasNftBonus (bool): True
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000001
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://78c670e005b88cbe47a3cf1560bf0528341277d46cd244d7fddd49c65ce9f73d
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Multichain Portfolio | 30 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
|---|
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.