// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
import {Trustus} from "../../protocol/Trustus/Trustus.sol";
/// @title DataTypes library
/// @author leNFT
/// @notice Defines the data types used in the protocol
/// @dev Library with the data types used in the protocol
library DataTypes {
/// @notice Struct to store the price data of an array of assets from the same collection
/// @param collection The address of the collection
/// @param tokenIds The tokenIds of the assets
/// @param amount The price of the assets
struct AssetsPrice {
address collection;
uint256[] tokenIds;
uint256 amount;
}
/// @notice Struct to store the risk parameters for a collection
/// @param maxLTV The maximum loan to value ratio
/// @param liquidationThreshold The threshold at which the loan can be liquidated
struct CollectionRiskParameters {
uint16 maxLTV;
uint16 liquidationThreshold;
}
/// @notice Enum of the liquidity pair types
/// @dev Trade: Can buy and sell and price can increase and decrease
/// @dev TradeUp: Can buy and sell and price can only increase
/// @dev TradeDown: Can buy and sell and price can only decrease
/// @dev Buy: Can only buy (price will only decrease)
/// @dev Sell: Can only sell (price will only increase)
enum LPType {
Trade,
TradeUp,
TradeDown,
Buy,
Sell
}
/// @notice Struct to store the liquidity pair data
/// @param nftIds The tokenIds of the assets
/// @param tokenAmount The amount of tokens in the liquidity pair
/// @param spotPrice The spot price of the liquidity pair
/// @param curve The address of the curve
/// @param delta The delta of the curve
/// @param fee The fee for the buy/sell trades
/// @param lpType The type of liquidity pair
struct LiquidityPair {
uint256[] nftIds;
uint128 tokenAmount;
uint128 spotPrice;
uint128 delta;
address curve;
uint16 fee;
LPType lpType;
}
/// @notice Struct serving as a pointer from an NFT to a liquidity pair
/// @param liquidityPair The index of the liquidity pair
/// @param index The index of the NFT in the liquidity pair
struct NftToLp {
uint128 liquidityPair;
uint128 index;
}
/// @notice Struct to store the working balance in gauges
/// @param amount The amount of tokens
/// @param weight The weight of the tokens
/// @param timestamp The timestamp of the update
struct WorkingBalance {
uint128 amount;
uint128 weight;
uint40 timestamp;
}
/// @notice Struct to store the locked balance in the voting escrow
/// @param amount The amount of tokens
/// @param end The timestamp of the end of the lock
struct LockedBalance {
uint128 amount;
uint40 end;
}
/// @notice Struct to store an abstract point in a weight curve
/// @param bias The bias of the point
/// @param slope The slope of the point
/// @param timestamp The timestamp of the point
struct Point {
uint128 bias;
uint128 slope;
uint40 timestamp;
}
/// @notice Enum of all the states a loan can be in
/// @dev State change flow: None -> Active -> Repaid -> Auction -> Liquidated
/// @dev None (Default Value): We need a default that is not 'Active' - this is the zero value
/// @dev Active: The loan has been initialized; funds have been delivered to the borrower and the collateral is held.
/// @dev Repaid: The loan has been repaid; and the collateral has been returned to the borrower.
/// @dev Auctioned: The loan's collateral has been auctioned off and its in the process of being liquidated.
/// @dev Liquidated: The loan's collateral was claimed by the liquidator.
enum LoanState {
None,
Active,
Repaid,
Auctioned,
Liquidated
}
/// @notice Stores the data for a loan
/// @param owner The owner of the loan
/// @param amount The amount borrowed
/// @param nftTokenIds The tokenIds of the NFT collaterals
/// @param nftAsset The address of the NFT asset
/// @param borrowRate The interest rate at which the loan was written
/// @param initTimestamp The timestamp for the initial creation of the loan
/// @param debtTimestamp The timestamp for debt computation
/// @param pool The address of the lending pool associated with the loan
/// @param genesisNFTId The genesis NFT id for the boost (0 if not used)
/// @param state The current state of the loan
struct LoanData {
address owner;
uint256 amount;
uint256[] nftTokenIds;
address nftAsset;
uint16 borrowRate;
uint40 initTimestamp;
uint40 debtTimestamp;
address pool;
uint16 genesisNFTId;
LoanState state;
}
/// @notice Stores the data for a loan auction
/// @param auctioneer The address of the auctioneer (user who first auctioned the loan)
/// @param liquidator The address of the liquidator (user with the highest bid)
/// @param auctionStartTimestamp The timestamp for the start of the auction
/// @param auctionMaxBid The maximum bid for the auction
struct LoanLiquidationData {
address auctioneer;
address liquidator;
uint40 auctionStartTimestamp;
uint256 auctionMaxBid;
}
/// @notice Struct to store mint details for each Genesis NFT
/// @param timestamp The timestamp of the mint
/// @param locktime The locktime of the mint
/// @param lpAmount The amount of LP tokens minted
struct MintDetails {
uint40 timestamp;
uint40 locktime;
uint128 lpAmount;
}
/// @notice Struct to store the parameters for a borrow call
/// @param caller The caller of the borrow function
/// @param onBehalfOf The address of the user on whose behalf the caller is borrowing
/// @param asset The address of the asset being borrowed
/// @param amount The amount of the asset being borrowed
/// @param nftAddress The address of the NFT asset
/// @param nftTokenIds The tokenIds of the NFT collaterals
/// @param genesisNFTId The genesis NFT id for the boost (0 if not used)
/// @param request The request ID for the borrow
/// @param packet The Trustus packet for the borrow
struct BorrowParams {
address caller;
address onBehalfOf;
address asset;
uint256 amount;
address nftAddress;
uint256[] nftTokenIds;
uint256 genesisNFTId;
bytes32 request;
Trustus.TrustusPacket packet;
}
/// @notice Struct to store the parameters for a repay call
/// @param caller The caller of the repay function
/// @param loanId The ID of the loan being repaid
/// @param amount The amount of debt being repaid
struct RepayParams {
address caller;
uint256 loanId;
uint256 amount;
}
/// @notice Struct to store the parameters for a create auction (liquidate) call
/// @param caller The caller of the create auction function
/// @param onBehalfOf The address of the user on whose behalf the caller is liquidating
/// @param loanId The ID of the loan being liquidated
/// @param bid The bid for the auction
/// @param request The request ID for the liquidation
/// @param packet The Trustus packet for the liquidation
struct CreateAuctionParams {
address caller;
address onBehalfOf;
uint256 loanId;
uint256 bid;
bytes32 request;
Trustus.TrustusPacket packet;
}
/// @notice Struct to store the parameters for an auction bid call
/// @param caller The caller of the auction bid function
/// @param onBehalfOf The address of the user on whose behalf the caller is bidding
/// @param loanId The ID of the loan being liquidated
/// @param bid The bid for the auction
struct BidAuctionParams {
address caller;
address onBehalfOf;
uint256 loanId;
uint256 bid;
}
/// @notice Struct to store the parameters for a claim liquidation call
/// @param loanId The ID of the loan whose liquidation is being claimed
struct ClaimLiquidationParams {
uint256 loanId;
}
/// @notice Struct to store the parameters a user's VestingParams
/// @param timestamp The timestamp of the vesting start
/// @param period The vesting period
/// @param cliff The vesting cliff
/// @param amount The amount of tokens to vest
struct VestingParams {
uint256 timestamp;
uint256 period;
uint256 cliff;
uint256 amount;
}
/// @notice Struct to store the parameters for the Genesis NFT balancer pool
/// @param poolId The ID of the balancer pool
/// @param pool The address of the balancer pool
/// @param vault The address of the balancer vault
/// @param queries The address of the balancer queries contract
struct BalancerDetails {
bytes32 poolId;
address pool;
address vault;
address queries;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: address zero is not a valid owner");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _ownerOf(tokenId);
require(owner != address(0), "ERC721: invalid token ID");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
_requireMinted(tokenId);
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not token owner or approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
_requireMinted(tokenId);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or 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: caller is not token owner or 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 the owner of the `tokenId`. Does NOT revert if token doesn't exist
*/
function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
return _owners[tokenId];
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _ownerOf(tokenId) != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId, 1);
// Check that tokenId was not minted by `_beforeTokenTransfer` hook
require(!_exists(tokenId), "ERC721: token already minted");
unchecked {
// Will not overflow unless all 2**256 token ids are minted to the same owner.
// Given that tokens are minted one by one, it is impossible in practice that
// this ever happens. Might change if we allow batch minting.
// The ERC fails to describe this case.
_balances[to] += 1;
}
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
* This is an internal function that does not check if the sender is authorized to operate on the token.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId, 1);
// Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
owner = ERC721.ownerOf(tokenId);
// Clear approvals
delete _tokenApprovals[tokenId];
unchecked {
// Cannot overflow, as that would require more tokens to be burned/transferred
// out than the owner initially received through minting and transferring in.
_balances[owner] -= 1;
}
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId, 1);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId, 1);
// Check that tokenId was not transferred by `_beforeTokenTransfer` hook
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
// Clear approvals from the previous owner
delete _tokenApprovals[tokenId];
unchecked {
// `_balances[from]` cannot overflow for the same reason as described in `_burn`:
// `from`'s balance is the number of token held, which is at least one before the current
// transfer.
// `_balances[to]` could overflow in the conditions described in `_mint`. That would require
// all 2**256 token ids to be minted, which in practice is impossible.
_balances[from] -= 1;
_balances[to] += 1;
}
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits an {ApprovalForAll} event.
*/
function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Reverts if the `tokenId` has not been minted yet.
*/
function _requireMinted(uint256 tokenId) internal view virtual {
require(_exists(tokenId), "ERC721: invalid token ID");
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
/// @solidity memory-safe-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
* - When `from` is zero, the tokens will be minted for `to`.
* - When `to` is zero, ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}
/**
* @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
* - When `from` is zero, the tokens were minted for `to`.
* - When `to` is zero, ``from``'s tokens were burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}
/**
* @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
*
* WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
* being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
* that `ownerOf(tokenId)` is `a`.
*/
// solhint-disable-next-line func-name-mixedcase
function __unsafe_increaseBalance(address account, uint256 amount) internal {
_balances[account] += amount;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize
) internal virtual override {
super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
if (batchSize > 1) {
// Will only trigger during construction. Batch transferring (minting) is not available afterwards.
revert("ERC721Enumerable: consecutive transfers not supported");
}
uint256 tokenId = firstTokenId;
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/utils/ERC721Holder.sol)
pragma solidity ^0.8.0;
import "../IERC721Receiver.sol";
/**
* @dev Implementation of the {IERC721Receiver} interface.
*
* Accepts all token transfers.
* Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
*/
contract ERC721Holder is IERC721Receiver {
/**
* @dev See {IERC721Receiver-onERC721Received}.
*
* Always returns `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
interface IAddressProvider {
function setLendingMarket(address market) external;
function getLendingMarket() external view returns (address);
function setTradingPoolFactory(address tradingPoolFactory) external;
function getTradingPoolFactory() external view returns (address);
function setSwapRouter(address swapRouter) external;
function getSwapRouter() external view returns (address);
function setGaugeController(address gaugeController) external;
function getGaugeController() external view returns (address);
function setLoanCenter(address loancenter) external;
function getLoanCenter() external view returns (address);
function setVotingEscrow(address nativeTokenVault) external;
function getVotingEscrow() external view returns (address);
function setNativeToken(address nativeToken) external;
function getNativeToken() external view returns (address);
function getNativeTokenVesting() external view returns (address);
function setInterestRate(address interestRate) external;
function getInterestRate() external view returns (address);
function setNFTOracle(address nftOracle) external;
function getNFTOracle() external view returns (address);
function setTokenOracle(address tokenOracle) external;
function getTokenOracle() external view returns (address);
function setFeeDistributor(address feeDistributor) external;
function getFeeDistributor() external view returns (address);
function setGenesisNFT(address genesisNFT) external;
function getGenesisNFT() external view returns (address);
function setWETH(address weth) external;
function getWETH() external view returns (address);
function setBribes(address bribes) external;
function getBribes() external view returns (address);
function setLiquidityPairMetadata(address liquidityPairMetadata) external;
function getLiquidityPairMetadata() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* 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;
/**
* @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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* 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 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 the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
interface IFeeDistributor {
event SalvageFees(
address indexed token,
uint256 indexed epoch,
uint256 amount
);
event ClaimFees(
address indexed receiver,
address indexed token,
uint256 indexed tokenId,
uint256 amount
);
function checkpoint(address token) external;
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
interface ILiquidityPairMetadata {
function tokenURI(
address tradingPool,
uint256 tokenId
) external view returns (string memory);
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
interface IPricingCurve {
function priceAfterBuy(
uint256 price,
uint256 delta,
uint256 fee
) external view returns (uint256);
function priceAfterSell(
uint256 price,
uint256 delta,
uint256 fee
) external view returns (uint256);
function validateLpParameters(
uint256 spotPrice,
uint256 delta,
uint256 fee
) external view;
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
import {DataTypes} from "../libraries/types/DataTypes.sol";
interface ITradingPool {
event AddLiquidity(
address indexed user,
uint256 indexed id,
DataTypes.LPType indexed lpType,
uint256[] nftIds,
uint256 tokenAmount,
uint256 spotPrice,
address curve,
uint256 delta,
uint256 fee
);
event RemoveLiquidity(address indexed user, uint256 indexed lpId);
event Buy(address indexed user, uint256[] nftIds, uint256 price);
event Sell(address indexed user, uint256[] nftIds, uint256 price);
event SetLpSpotPrice(
address indexed user,
uint256 indexed lpId,
uint256 spotPrice
);
event SetLpPricingCurve(
address indexed user,
uint256 indexed lpId,
address curve,
uint256 delta
);
event SetLpFee(address indexed user, uint256 indexed lpId, uint256 fee);
function addLiquidity(
address receiver,
DataTypes.LPType lpType,
uint256[] memory nftIds,
uint256 tokenAmount,
uint256 initialPrice,
address curve,
uint256 delta,
uint256 fee
) external;
function removeLiquidity(uint256 lpId) external;
function removeLiquidityBatch(uint256[] memory lpIds) external;
function buy(
address onBehalfOf,
uint256[] memory nftIds,
uint256 maximumPrice
) external returns (uint256);
function sell(
address onBehalfOf,
uint256[] memory nftIds,
uint256[] memory liquidityPairs,
uint256 minimumPrice
) external returns (uint256);
function getLP(
uint256 lpId
) external view returns (DataTypes.LiquidityPair memory);
function getLpCount() external view returns (uint256);
function nftToLp(uint256 nftId) external view returns (uint256);
function getToken() external view returns (address);
function getNFT() external view returns (address);
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.8.19;
interface ITradingPoolFactory {
event CreateTradingPool(
address indexed pool,
address indexed nft,
address indexed token
);
event SetTradingPool(
address indexed pool,
address indexed nft,
address indexed token
);
function getProtocolFeePercentage() external view returns (uint256);
function getTVLSafeguard() external view returns (uint256);
function isTradingPool(address pool) external view returns (bool);
function isPriceCurve(address priceCurve) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.19;
/**
* @title PercentageMath library
* @author Aave
* @notice Provides functions to perform percentage calculations
* @dev Percentages are defined by default with 2 decimals of precision (100.00). The precision is indicated by PERCENTAGE_FACTOR
* @dev Operations are rounded. If a value is >=.5, will be rounded up, otherwise rounded down.
**/
library PercentageMath {
// Maximum percentage factor (100.00%)
uint256 internal constant PERCENTAGE_FACTOR = 1e4;
// Half percentage factor (50.00%)
uint256 internal constant HALF_PERCENTAGE_FACTOR = 0.5e4;
/**
* @notice Executes a percentage multiplication
* @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
* @param value The value of which the percentage needs to be calculated
* @param percentage The percentage of the value to be calculated
* @return result value percentmul percentage
**/
function percentMul(
uint256 value,
uint256 percentage
) internal pure returns (uint256 result) {
// to avoid overflow, value <= (type(uint256).max - HALF_PERCENTAGE_FACTOR) / percentage
// solhint-disable-next-line no-inline-assembly
assembly {
if iszero(
or(
iszero(percentage),
iszero(
gt(
value,
div(sub(not(0), HALF_PERCENTAGE_FACTOR), percentage)
)
)
)
) {
revert(0, 0)
}
result := div(
add(mul(value, percentage), HALF_PERCENTAGE_FACTOR),
PERCENTAGE_FACTOR
)
}
}
/**
* @notice Executes a percentage division
* @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
* @param value The value of which the percentage needs to be calculated
* @param percentage The percentage of the value to be calculated
* @return result value percentdiv percentage
**/
function percentDiv(
uint256 value,
uint256 percentage
) internal pure returns (uint256 result) {
// to avoid overflow, value <= (type(uint256).max - halfPercentage) / PERCENTAGE_FACTOR
// solhint-disable-next-line no-inline-assembly
assembly {
if or(
iszero(percentage),
iszero(
iszero(
gt(
value,
div(
sub(not(0), div(percentage, 2)),
PERCENTAGE_FACTOR
)
)
)
)
) {
revert(0, 0)
}
result := div(
add(mul(value, PERCENTAGE_FACTOR), div(percentage, 2)),
percentage
)
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.19;
/// @title SafeCast library
/// @author leNFT
/// @notice Casting utilities
/// @dev This library is used to safely cast between uint256 and smaller sized unsigned integers
library SafeCast {
/// @notice Cast a uint256 to a uint32, revert on overflow
/// @param value The uint256 value to be casted
/// @return The uint32 value casted from uint256
function toUint16(uint256 value) internal pure returns (uint16) {
require(value <= type(uint16).max, "SC:CAST16_OVERFLOW");
return uint16(value);
}
/// @notice Cast a uint256 to a uint40, revert on overflow
/// @param value The uint256 value to be casted
/// @return The uint40 value casted from uint256
function toUint40(uint256 value) internal pure returns (uint40) {
require(value <= type(uint40).max, "SC:CAST40_OVERFLOW");
return uint40(value);
}
/// @notice Cast a uint256 to a uint64, revert on overflow
/// @param value The uint256 value to be casted
/// @return The uint64 value casted from uint256
function toUint64(uint256 value) internal pure returns (uint64) {
require(value <= type(uint64).max, "SC:CAST64_OVERFLOW");
return uint64(value);
}
function toUint128(uint256 value) internal pure returns (uint128) {
require(value <= type(uint128).max, "SC:CAST128_OVERFLOW");
return uint128(value);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to
* 0 before setting it to a non-zero value.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMath {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/Math.sol";
import "./math/SignedMath.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toString(int256 value) internal pure returns (string memory) {
return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return keccak256(bytes(a)) == keccak256(bytes(b));
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.19;
import {ITradingPool} from "../../interfaces/ITradingPool.sol";
import {IAddressProvider} from "../../interfaces/IAddressProvider.sol";
import {IPricingCurve} from "../../interfaces/IPricingCurve.sol";
import {IFeeDistributor} from "../../interfaces/IFeeDistributor.sol";
import {ITradingPoolFactory} from "../../interfaces/ITradingPoolFactory.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import {ERC721Enumerable} from "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import {ERC721Holder} from "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ERC165} from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {DataTypes} from "../../libraries/types/DataTypes.sol";
import {PercentageMath} from "../../libraries/utils/PercentageMath.sol";
import {ILiquidityPairMetadata} from "../../interfaces/ILiquidityPairMetadata.sol";
import {SafeCast} from "../../libraries/utils/SafeCast.sol";
/// @title Trading Pool Contract
/// @author leNFT
/// @notice A contract that enables the creation of liquidity pools and the trading of NFTs and ERC20 tokens.
/// @dev This contract manages liquidity pairs, each consisting of a set of NFTs and an ERC20 token, as well as the trading of these pairs.
contract TradingPool is
ERC165,
ERC721Enumerable,
ERC721Holder,
ITradingPool,
Ownable,
ReentrancyGuard
{
uint public constant MAX_FEE = 8000; // 80%
IAddressProvider private immutable _addressProvider;
bool private _paused;
address private immutable _token;
address private immutable _nft;
mapping(uint256 => DataTypes.LiquidityPair) private _liquidityPairs;
mapping(uint256 => DataTypes.NftToLp) private _nftToLp;
uint256 private _lpCount;
using SafeERC20 for IERC20;
modifier poolNotPaused() {
_requirePoolNotPaused();
_;
}
modifier lpExists(uint256 lpId) {
_requireLpExists(lpId);
_;
}
/// @notice Trading Pool constructor.
/// @dev The constructor should only be called by the Trading Pool Factory contract.
/// @param addressProvider The address provider contract.
/// @param owner The owner of the Trading Pool contract.
/// @param token The ERC20 token used in the trading pool.
/// @param nft The address of the ERC721 contract.
/// @param name The name of the ERC721 token.
/// @param symbol The symbol of the ERC721 token.
constructor(
IAddressProvider addressProvider,
address owner,
address token,
address nft,
string memory name,
string memory symbol
) ERC721(name, symbol) {
require(
msg.sender == addressProvider.getTradingPoolFactory(),
"TP:C:MUST_BE_FACTORY"
);
_addressProvider = addressProvider;
_token = token;
_nft = nft;
_transferOwnership(owner);
}
/// @notice Returns the token URI for a specific liquidity pair
/// @param tokenId The ID of the liquidity pair.
/// @return The token URI.
function tokenURI(
uint256 tokenId
) public view override lpExists(tokenId) returns (string memory) {
return
ILiquidityPairMetadata(_addressProvider.getLiquidityPairMetadata())
.tokenURI(address(this), tokenId);
}
/// @notice Gets the address of the ERC721 traded in the pool.
/// @return The address of the ERC721 token.
function getNFT() external view override returns (address) {
return _nft;
}
/// @notice Gets the address of the ERC20 token traded in the pool.
/// @return The address of the ERC20 token.
function getToken() external view override returns (address) {
return _token;
}
/// @notice Gets the liquidity pair with the specified ID.
/// @param lpId The ID of the liquidity pair.
/// @return The liquidity pair.
function getLP(
uint256 lpId
)
external
view
override
lpExists(lpId)
returns (DataTypes.LiquidityPair memory)
{
return _liquidityPairs[lpId];
}
/// @notice Gets the number of liquidity pairs ever created in the trading pool.
/// @return The number of liquidity pairs.
function getLpCount() external view override returns (uint256) {
return _lpCount;
}
/// @notice Gets the ID of the liquidity pair associated with the specified NFT.
/// @param nftId The ID of the NFT.
/// @return The ID of the liquidity pair.
function nftToLp(uint256 nftId) external view override returns (uint256) {
require(
IERC721(_nft).ownerOf(nftId) == address(this),
"TP:NTL:NOT_OWNED"
);
return _nftToLp[nftId].liquidityPair;
}
/// @notice Adds liquidity to the trading pool.
/// @dev At least one of nftIds or tokenAmount must be greater than zero.
/// @dev The caller must approve the Trading Pool contract to transfer the NFTs and ERC20 tokens.
/// @param receiver The recipient of the liquidity pool tokens.
/// @param nftIds The IDs of the NFTs being deposited.
/// @param tokenAmount The amount of the ERC20 token being deposited.
/// @param spotPrice The spot price of the liquidity pair being created.
/// @param curve The pricing curve for the liquidity pair being created.
/// @param delta The delta for the liquidity pair being created.
/// @param fee The fee for the liquidity pair being created.
function addLiquidity(
address receiver,
DataTypes.LPType lpType,
uint256[] calldata nftIds,
uint256 tokenAmount,
uint256 spotPrice,
address curve,
uint256 delta,
uint256 fee
) external override nonReentrant poolNotPaused {
ITradingPoolFactory tradingPoolFactory = ITradingPoolFactory(
_addressProvider.getTradingPoolFactory()
);
// Check if pool will exceed maximum permitted amount
require(
tokenAmount + IERC20(_token).balanceOf(address(this)) <
tradingPoolFactory.getTVLSafeguard(),
"TP:AL:SAFEGUARD_EXCEEDED"
);
// Different types of liquidity pairs have different requirements
// Trade: Can contain NFTs and/or tokens
// TradeUp: Can contain NFTs and/or tokens, delta must be > 0
// TradeDown: Can contain NFTs and/or tokens, delta must be > 0
// Buy: Can only contain tokens
// Sell: Can only contain NFTs
if (
lpType == DataTypes.LPType.Trade ||
lpType == DataTypes.LPType.TradeUp ||
lpType == DataTypes.LPType.TradeDown
) {
require(
tokenAmount > 0 || nftIds.length > 0,
"TP:AL:DEPOSIT_REQUIRED"
);
} else if (lpType == DataTypes.LPType.Buy) {
require(tokenAmount > 0 && nftIds.length == 0, "TP:AL:TOKENS_ONLY");
} else if (lpType == DataTypes.LPType.Sell) {
require(nftIds.length > 0 && tokenAmount == 0, "TP:AL:NFTS_ONLY");
}
// Directional LPs must have a positive delta in order for the price to move or else
// they degenerate into a Trade LPs with delta = 0
if (
lpType == DataTypes.LPType.TradeUp ||
lpType == DataTypes.LPType.TradeDown
) {
require(delta > 0, "TP:AL:DELTA_0");
}
if (lpType == DataTypes.LPType.Buy || lpType == DataTypes.LPType.Sell) {
// Validate fee
require(fee == 0, "TP:AL:INVALID_LIMIT_FEE");
} else {
// require that the fee is higher than 0 and less than the maximum fee
require(fee > 0 && fee <= MAX_FEE, "TP:AL:INVALID_FEE");
}
// Require that the curve conforms to the curve interface
require(tradingPoolFactory.isPriceCurve(curve), "TP:AL:INVALID_CURVE");
// Validate LP params for chosen curve
IPricingCurve(curve).validateLpParameters(spotPrice, delta, fee);
// Add user nfts to the pool
for (uint i = 0; i < nftIds.length; i++) {
IERC721(_nft).safeTransferFrom(
msg.sender,
address(this),
nftIds[i]
);
_nftToLp[nftIds[i]] = DataTypes.NftToLp({
liquidityPair: SafeCast.toUint128(_lpCount),
index: SafeCast.toUint128(i)
});
}
// Send user token to the pool
if (tokenAmount > 0) {
IERC20(_token).safeTransferFrom(
msg.sender,
address(this),
tokenAmount
);
}
// Save the user deposit info
_liquidityPairs[_lpCount] = DataTypes.LiquidityPair({
lpType: lpType,
nftIds: nftIds,
tokenAmount: SafeCast.toUint128(tokenAmount),
spotPrice: SafeCast.toUint128(spotPrice),
curve: curve,
delta: SafeCast.toUint128(delta),
fee: SafeCast.toUint16(fee)
});
// Mint liquidity position NFT
ERC721._safeMint(receiver, _lpCount);
emit AddLiquidity(
receiver,
_lpCount,
lpType,
nftIds,
tokenAmount,
spotPrice,
curve,
delta,
fee
);
_lpCount++;
}
/// @notice Removes liquidity pair, sending back deposited tokens and transferring the NFTs to the user
/// @param lpId The ID of the LP token to remove
function removeLiquidity(uint256 lpId) external override nonReentrant {
_removeLiquidity(lpId);
}
/// @notice Removes liquidity pairs in batches by calling the removeLiquidity function for each LP token ID in the lpIds array
/// @param lpIds The IDs of the LP tokens to remove liquidity from
function removeLiquidityBatch(
uint256[] calldata lpIds
) external override nonReentrant {
for (uint i = 0; i < lpIds.length; i++) {
_removeLiquidity(lpIds[i]);
}
}
/// @notice Private function that removes a liquidity pair, sending back deposited tokens and transferring the NFTs to the user
/// @param lpId The ID of the LP token to remove
function _removeLiquidity(uint256 lpId) private {
//Require the caller owns LP
require(msg.sender == ERC721.ownerOf(lpId), "TP:RL:NOT_OWNER");
// Send pool nfts to the user
uint256 nftIdsLength = _liquidityPairs[lpId].nftIds.length;
for (uint i = 0; i < nftIdsLength; i++) {
IERC721(_nft).safeTransferFrom(
address(this),
msg.sender,
_liquidityPairs[lpId].nftIds[i]
);
delete _nftToLp[_liquidityPairs[lpId].nftIds[i]];
}
// Send pool token back to user
IERC20(_token).safeTransfer(
msg.sender,
_liquidityPairs[lpId].tokenAmount
);
// delete the user deposit info
delete _liquidityPairs[lpId];
// Burn liquidity position NFT
ERC721._burn(lpId);
emit RemoveLiquidity(msg.sender, lpId);
}
/// @notice Buys NFTs in exchange for pool tokens
/// @param onBehalfOf The address to deposit the NFTs to
/// @param nftIds The IDs of the NFTs to buy
/// @param maximumPrice The maximum price the user is willing to pay for the NFTs
/// @return finalPrice The final price paid for the NFTs
function buy(
address onBehalfOf,
uint256[] calldata nftIds,
uint256 maximumPrice
)
external
override
nonReentrant
poolNotPaused
returns (uint256 finalPrice)
{
require(nftIds.length > 0, "TP:B:NFTS_0");
uint256 lpIndex;
uint256 fee;
uint256 totalProtocolFee;
uint256 protocolFee;
DataTypes.LiquidityPair memory lp;
uint256 protocolFeePercentage = ITradingPoolFactory(
_addressProvider.getTradingPoolFactory()
).getProtocolFeePercentage();
for (uint i = 0; i < nftIds.length; i++) {
// Check if the pool contract owns the NFT
require(
IERC721(_nft).ownerOf(nftIds[i]) == address(this),
"TP:B:NOT_OWNER"
);
lpIndex = _nftToLp[nftIds[i]].liquidityPair;
lp = _liquidityPairs[lpIndex];
// Can't buy from buy LP
require(lp.lpType != DataTypes.LPType.Buy, "TP:B:IS_BUY_LP");
fee = PercentageMath.percentMul(lp.spotPrice, lp.fee);
protocolFee = PercentageMath.percentMul(fee, protocolFeePercentage);
// Remove nft from liquidity pair nft list
_liquidityPairs[lpIndex].nftIds[_nftToLp[nftIds[i]].index] = lp
.nftIds[lp.nftIds.length - 1];
// Update NFT to lp tracker
_nftToLp[lp.nftIds[lp.nftIds.length - 1]].index = _nftToLp[
nftIds[i]
].index;
delete _nftToLp[nftIds[i]];
_liquidityPairs[lpIndex].nftIds.pop();
_liquidityPairs[lpIndex].tokenAmount += SafeCast.toUint128(
(lp.spotPrice + fee - protocolFee)
);
// Increase total price and fee sum
finalPrice += (lp.spotPrice + fee);
totalProtocolFee += protocolFee;
// Update liquidity pair price
if (lp.lpType != DataTypes.LPType.TradeDown) {
_liquidityPairs[lpIndex].spotPrice = SafeCast.toUint128(
IPricingCurve(lp.curve).priceAfterBuy(
lp.spotPrice,
lp.delta,
lp.fee
)
);
}
// Send NFT to user
IERC721(_nft).safeTransferFrom(
address(this),
onBehalfOf,
nftIds[i]
);
}
require(finalPrice <= maximumPrice, "TP:B:MAX_PRICE_EXCEEDED");
// Get tokens from user
IERC20(_token).safeTransferFrom(msg.sender, address(this), finalPrice);
// Send protocol fee to protocol fee distributor
address feeDistributor = _addressProvider.getFeeDistributor();
IERC20(_token).safeTransfer(feeDistributor, totalProtocolFee);
IFeeDistributor(feeDistributor).checkpoint(_token);
emit Buy(onBehalfOf, nftIds, finalPrice);
}
/// @notice Allows an address to sell one or more NFTs in exchange for a token amount.
/// @param onBehalfOf The address that owns the NFT(s) and will receive the token amount.
/// @param nftIds An array of the IDs of the NFTs to sell.
/// @param liquidityPairs An array of the IDs of the liquidity pairs to use for the sale.
/// @param minimumPrice The minimum acceptable price in tokens for the sale.
/// @return finalPrice The final price in tokens received from the sale.
function sell(
address onBehalfOf,
uint256[] calldata nftIds,
uint256[] calldata liquidityPairs,
uint256 minimumPrice
)
external
override
nonReentrant
poolNotPaused
returns (uint256 finalPrice)
{
require(nftIds.length == liquidityPairs.length, "TP:S:NFT_LP_MISMATCH");
require(nftIds.length > 0, "TP:S:NFTS_0");
// Only the swap router can call this function on behalf of another address
if (onBehalfOf != msg.sender) {
require(
msg.sender == _addressProvider.getSwapRouter(),
"TP:S:NOT_SWAP_ROUTER"
);
}
uint256 totalProtocolFee;
uint256 fee;
DataTypes.LiquidityPair memory lp;
uint256 lpIndex;
uint256 protocolFeePercentage = ITradingPoolFactory(
_addressProvider.getTradingPoolFactory()
).getProtocolFeePercentage();
// Transfer the NFTs to the pool
for (uint i = 0; i < nftIds.length; i++) {
// Check if the LP exists
lpIndex = liquidityPairs[i];
require(_exists(lpIndex), "TP:S:LP_NOT_FOUND");
// Get the LP details
lp = _liquidityPairs[lpIndex];
// Send NFT to the pool
IERC721(_nft).safeTransferFrom(
onBehalfOf,
address(this),
nftIds[i]
);
// Can't sell to sell LP
require(lp.lpType != DataTypes.LPType.Sell, "TP:S:IS_SELL_LP");
// Calculate the fee and protocol fee for the sale
fee = PercentageMath.percentMul(lp.spotPrice, lp.fee);
require(
lp.tokenAmount >=
lp.spotPrice -
fee +
PercentageMath.percentMul(fee, protocolFeePercentage),
"TP:S:INSUFFICIENT_TOKENS_IN_LP"
);
// Add nft to liquidity pair nft list
_liquidityPairs[lpIndex].nftIds.push(nftIds[i]);
//Update NFT tracker
_nftToLp[nftIds[i]] = DataTypes.NftToLp({
liquidityPair: SafeCast.toUint128(lpIndex),
index: SafeCast.toUint128(
_liquidityPairs[lpIndex].nftIds.length - 1
)
});
// Update token amount in liquidity pair
_liquidityPairs[lpIndex].tokenAmount -= SafeCast.toUint128(
(lp.spotPrice -
fee +
PercentageMath.percentMul(fee, protocolFeePercentage))
);
// Update total price quote and fee sum
finalPrice += (lp.spotPrice - fee);
totalProtocolFee += PercentageMath.percentMul(
fee,
protocolFeePercentage
);
// Update liquidity pair price
if (lp.lpType != DataTypes.LPType.TradeUp) {
_liquidityPairs[lpIndex].spotPrice = SafeCast.toUint128(
IPricingCurve(lp.curve).priceAfterSell(
lp.spotPrice,
lp.delta,
lp.fee
)
);
}
}
// Make sure the final price is greater than or equal to the minimum price set by the user
require(finalPrice >= minimumPrice, "TP:S:MINIMUM_PRICE_NOT_REACHED");
// Send tokens to user
IERC20(_token).safeTransfer(msg.sender, finalPrice);
// Send protocol fee to protocol fee distributor and call a checkpoint
address feeDistributor = _addressProvider.getFeeDistributor();
IERC20(_token).safeTransfer(feeDistributor, totalProtocolFee);
IFeeDistributor(feeDistributor).checkpoint(_token);
emit Sell(onBehalfOf, nftIds, finalPrice);
}
/// @notice Allows the owner of the contract to pause or unpause the contract.
/// @param paused A boolean indicating whether to pause or unpause the contract.
function setPause(bool paused) external onlyOwner {
_paused = paused;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId,
uint256 batchSize
) internal override(ERC721Enumerable) {
ERC721Enumerable._beforeTokenTransfer(from, to, tokenId, batchSize);
}
function supportsInterface(
bytes4 interfaceId
) public view override(ERC165, ERC721Enumerable) returns (bool) {
return
type(ITradingPool).interfaceId == interfaceId ||
ERC721Enumerable.supportsInterface(interfaceId) ||
ERC165.supportsInterface(interfaceId);
}
function _requirePoolNotPaused() internal view {
require(!_paused, "TP:POOL_PAUSED");
}
function _requireLpExists(uint256 lpIndex) internal view {
require(_exists(lpIndex), "TP:LP_NOT_FOUND");
}
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.19;
/// @title Trustus
/// @author zefram.eth
/// @notice Trust-minimized method for accessing offchain data onchain
abstract contract Trustus {
/// -----------------------------------------------------------------------
/// Structs
/// -----------------------------------------------------------------------
/// @param v Part of the ECDSA signature
/// @param r Part of the ECDSA signature
/// @param s Part of the ECDSA signature
/// @param request Identifier for verifying the packet is what is desired
/// , rather than a packet for some other function/contract
/// @param deadline The Unix timestamp (in seconds) after which the packet
/// should be rejected by the contract
/// @param payload The payload of the packet
struct TrustusPacket {
uint8 v;
bytes32 r;
bytes32 s;
bytes32 request;
uint256 deadline;
bytes payload;
}
/// -----------------------------------------------------------------------
/// Immutable parameters
/// -----------------------------------------------------------------------
/// @notice The chain ID used by EIP-712
// solhint-disable-next-line var-name-mixedcase
uint256 internal immutable INITIAL_CHAIN_ID;
/// @notice The domain separator used by EIP-712
// solhint-disable-next-line var-name-mixedcase
bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;
/// -----------------------------------------------------------------------
/// Storage variables
/// -----------------------------------------------------------------------
/// @notice Records whether an address is trusted as a packet provider
/// @dev provider => value
mapping(address => bool) internal isTrusted;
/// -----------------------------------------------------------------------
/// Modifiers
/// -----------------------------------------------------------------------
/// @notice Verifies whether a packet is valid and returns the result.
/// Will revert if the packet is invalid.
/// @dev The deadline, request, and signature are verified.
/// @param request The identifier for the requested payload
/// @param packet The packet provided by the offchain data provider
modifier verifyPacket(bytes32 request, TrustusPacket calldata packet) {
_verifyPacket(request, packet);
_;
}
/// -----------------------------------------------------------------------
/// Constructor
/// -----------------------------------------------------------------------
constructor() {
INITIAL_CHAIN_ID = block.chainid;
INITIAL_DOMAIN_SEPARATOR = _computeDomainSeparator();
}
/// -----------------------------------------------------------------------
/// Packet verification
/// -----------------------------------------------------------------------
/// @notice Verifies whether a packet is valid and returns the result.
/// @dev The deadline, request, and signature are verified.
/// @param request The identifier for the requested payload
/// @param packet The packet provided by the offchain data provider
function _verifyPacket(
bytes32 request,
TrustusPacket calldata packet
) internal view virtual {
// verify deadline
require(block.timestamp < packet.deadline, "T:V:DEADLINE_EXCEEDED");
// verify request
require(request == packet.request, "T:V:INVALID_REQUEST");
// verify signature
address recoveredAddress = ecrecover(
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR(),
keccak256(
abi.encode(
keccak256(
"VerifyPacket(bytes32 request,uint256 deadline,bytes payload)"
),
packet.request,
packet.deadline,
keccak256(packet.payload)
)
)
)
),
packet.v,
packet.r,
packet.s
);
require(
recoveredAddress != address(0) && isTrusted[recoveredAddress],
"T:V:INVALID_SIGNATURE"
);
}
/// @notice Sets the trusted status of an offchain data provider.
/// @param signer The data provider's ECDSA public key as an Ethereum address
/// @param isTrusted_ The desired trusted status to set
function _setIsTrusted(address signer, bool isTrusted_) internal virtual {
isTrusted[signer] = isTrusted_;
}
function _isTrusted(address signer) internal view virtual returns (bool) {
return (isTrusted[signer]);
}
/// -----------------------------------------------------------------------
/// EIP-712 compliance
/// -----------------------------------------------------------------------
/// @notice The domain separator used by EIP-712
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
return
block.chainid == INITIAL_CHAIN_ID
? INITIAL_DOMAIN_SEPARATOR
: _computeDomainSeparator();
}
/// @notice Computes the domain separator used by EIP-712
function _computeDomainSeparator() internal view virtual returns (bytes32) {
return
keccak256(
abi.encode(
keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
),
keccak256("leNFT"),
keccak256("1"),
block.chainid,
address(this)
)
);
}
}
{
"compilationTarget": {
"contracts/protocol/Trading/TradingPool.sol": "TradingPool"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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