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0x60806040 | 19668859 | 85 days ago | IN | Create: RolloverVault | 0 ETH | 0.07676517 |
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Contract Name:
RolloverVault
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 750 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.20; import { IERC20Upgradeable, IPerpetualTranche, IBondController, ITranche, IFeePolicy } from "./_interfaces/IPerpetualTranche.sol"; import { IVault } from "./_interfaces/IVault.sol"; import { IRolloverVault } from "./_interfaces/IRolloverVault.sol"; import { IERC20Burnable } from "./_interfaces/IERC20Burnable.sol"; import { TokenAmount, RolloverData, SubscriptionParams } from "./_interfaces/CommonTypes.sol"; import { UnauthorizedCall, UnauthorizedTransferOut, UnexpectedDecimals, UnexpectedAsset, OutOfBounds, UnacceptableSwap, InsufficientDeployment, DeployedCountOverLimit, InvalidPerc, InsufficientLiquidity } from "./_interfaces/ProtocolErrors.sol"; import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol"; import { PausableUpgradeable } from "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol"; import { ReentrancyGuardUpgradeable } from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol"; import { MathUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; import { ERC20BurnableUpgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC20BurnableUpgradeable.sol"; import { EnumerableSetUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol"; import { SafeERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol"; import { BondTranches, BondTranchesHelpers } from "./_utils/BondTranchesHelpers.sol"; import { TrancheHelpers } from "./_utils/TrancheHelpers.sol"; import { BondHelpers } from "./_utils/BondHelpers.sol"; import { PerpHelpers } from "./_utils/PerpHelpers.sol"; /* * @title RolloverVault * * @notice A vault which generates yield (from fees) by performing rollovers on PerpetualTranche (or perp). * The vault takes in AMPL or any other rebasing collateral as the "underlying" asset. * * Vault strategy: * 1) deploy: The vault deposits the underlying asset into perp's current deposit bond * to get tranche tokens in return, it then swaps these fresh tranche tokens for * older tranche tokens (ones mature or approaching maturity) from perp. * 2) recover: The vault redeems the tranches it holds for the underlying asset. * NOTE: It performs both mature and immature redemption. Read more: https://bit.ly/3tuN6OC * * With v2.0, vault provides perp<>underlying swap liquidity and charges a fee. * The swap fees are an additional source of yield for vault note holders. * * @dev When new tranches are added into the system, always double check if they are not malicious * by only accepting one whitelisted by perp (ones part of perp's deposit bond or ones part of the perp reserve). * * We use `_syncAsset` and `_syncDeployedAsset` to keep track of tokens entering and leaving the system. * When ever a tranche token enters or leaves the system, we immediately invoke `_syncDeployedAsset` to update book-keeping. * We call `_syncAsset` at the very end of every external function which changes the vault's underlying or perp balance. * */ contract RolloverVault is ERC20BurnableUpgradeable, OwnableUpgradeable, PausableUpgradeable, ReentrancyGuardUpgradeable, IRolloverVault { // data handling using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet; using BondHelpers for IBondController; using TrancheHelpers for ITranche; using BondTranchesHelpers for BondTranches; // ERC20 operations using SafeERC20Upgradeable for IERC20Upgradeable; // math using MathUpgradeable for uint256; //------------------------------------------------------------------------- // Events /// @notice Emits the vault asset's token balance that's recorded after a change. /// @param token Address of token. /// @param balance The recorded ERC-20 balance of the token. event AssetSynced(IERC20Upgradeable token, uint256 balance); //------------------------------------------------------------------------- // Constants /// @dev Number of decimals for a multiplier of 1.0x (i.e. 100%) uint8 public constant FEE_POLICY_DECIMALS = 8; uint256 public constant FEE_ONE = (10 ** FEE_POLICY_DECIMALS); /// @dev Internal percentages are fixed point numbers with {PERC_DECIMALS} places. uint8 public constant PERC_DECIMALS = 8; uint256 public constant ONE = (10 ** PERC_DECIMALS); // 1.0 or 100% /// @dev Initial exchange rate between the underlying asset and notes. uint256 private constant INITIAL_RATE = 10 ** 6; /// @dev The maximum number of deployed assets that can be held in this vault at any given time. uint8 public constant MAX_DEPLOYED_COUNT = 47; /// @dev Immature redemption may result in some dust tranches when balances are not perfectly divisible by the tranche ratio. /// Based on current the implementation of `computeRedeemableTrancheAmounts`, /// the dust balances which remain after immature redemption will be *at most* {TRANCHE_RATIO_GRANULARITY} or 1000. /// We exclude the vault's dust tranche balances from TVL computation, note redemption and /// during recovery (through recurrent immature redemption). uint256 public constant TRANCHE_DUST_AMT = 10000000; //-------------------------------------------------------------------------- // ASSETS // // The vault's assets are represented by a master list of ERC-20 tokens // => { [underlying] U _deployed } // // /// @notice The ERC20 token that can be deposited into this vault. IERC20Upgradeable public underlying; /// @dev The set of the intermediate ERC-20 tokens when the underlying asset has been put to use. /// In the case of this vault, they represent the tranche tokens held before maturity. EnumerableSetUpgradeable.AddressSet private _deployed; //------------------------------------------------------------------------- // Storage /// @notice Minimum amount of underlying assets that must be deployed, for a deploy operation to succeed. /// @dev The deployment transaction reverts, if the vaults does not have sufficient underlying tokens /// to cover the minimum deployment amount. uint256 public minDeploymentAmt; /// @notice The perpetual token on which rollovers are performed. IPerpetualTranche public perp; //-------------------------------------------------------------------------- // v2.0.0 STORAGE ADDITION /// @notice External contract that orchestrates fees across the spot protocol. IFeePolicy public feePolicy; /// @notice Reference to the address that has the ability to pause/unpause operations. /// @dev The keeper is meant for time-sensitive operations, and may be different from the owner address. /// @return The address of the keeper. address public keeper; /// @notice The enforced minimum absolute balance of underlying tokens to be held by the vault. /// @dev On deployment only the delta greater than this balance is deployed. /// `minUnderlyingBal` is enforced on deployment and swapping operations which reduce the underlying balance. /// This parameter ensures that the vault's tvl is never too low, which guards against the "share" manipulation attack. uint256 public minUnderlyingBal; /// @notice The enforced minimum percentage of the vault's value to be held as underlying tokens. /// @dev The percentage minimum is enforced after swaps which reduce the vault's underlying token liquidity. /// This ensures that the vault has sufficient liquid underlying tokens for upcoming rollovers. uint256 public minUnderlyingPerc; //-------------------------------------------------------------------------- // Modifiers /// @dev Throws if called by any account other than the keeper. modifier onlyKeeper() { if (msg.sender != keeper) { revert UnauthorizedCall(); } _; } //-------------------------------------------------------------------------- // Construction & Initialization /// @custom:oz-upgrades-unsafe-allow constructor constructor() { _disableInitializers(); } /// @notice Contract state initialization. /// @param name ERC-20 Name of the vault token. /// @param symbol ERC-20 Symbol of the vault token. /// @param perp_ ERC-20 address of the perpetual tranche rolled over. /// @param feePolicy_ Address of the fee policy contract. function init( string memory name, string memory symbol, IPerpetualTranche perp_, IFeePolicy feePolicy_ ) external initializer { // initialize dependencies __ERC20_init(name, symbol); __ERC20Burnable_init(); __Ownable_init(); __Pausable_init(); __ReentrancyGuard_init(); // setup underlying collateral underlying = perp_.underlying(); // set reference to perp perp = perp_; // set the reference to the fee policy updateFeePolicy(feePolicy_); // set keeper reference updateKeeper(owner()); // setting initial parameter values minDeploymentAmt = 0; minUnderlyingBal = 0; minUnderlyingPerc = ONE / 3; // 33% // sync underlying _syncAsset(underlying); } //-------------------------------------------------------------------------- // Owner only methods /// @notice Update the reference to the fee policy contract. /// @param feePolicy_ New strategy address. function updateFeePolicy(IFeePolicy feePolicy_) public onlyOwner { if (feePolicy_.decimals() != FEE_POLICY_DECIMALS) { revert UnexpectedDecimals(); } feePolicy = feePolicy_; } /// @notice Transfers a non-vault token out of the contract, which may have been added accidentally. /// @param token The token address. /// @param to The destination address. /// @param amount The amount of tokens to be transferred. function transferERC20(IERC20Upgradeable token, address to, uint256 amount) external onlyOwner nonReentrant { if (isVaultAsset(token)) { revert UnauthorizedTransferOut(); } token.safeTransfer(to, amount); } /// @notice Updates the reference to the keeper. /// @param keeper_ The address of the new keeper. function updateKeeper(address keeper_) public onlyOwner { keeper = keeper_; } //-------------------------------------------------------------------------- // Keeper only methods /// @notice Pauses deposits, withdrawals and vault operations. /// @dev NOTE: ERC-20 functions, like transfers will always remain operational. function pause() external onlyKeeper { _pause(); } /// @notice Unpauses deposits, withdrawals and vault operations. /// @dev NOTE: ERC-20 functions, like transfers will always remain operational. function unpause() external onlyKeeper { _unpause(); } /// @notice Updates the minimum deployment amount requirement. /// @param minDeploymentAmt_ The new minimum deployment amount, denominated in underlying tokens. function updateMinDeploymentAmt(uint256 minDeploymentAmt_) external onlyKeeper { minDeploymentAmt = minDeploymentAmt_; } /// @notice Updates the minimum underlying balance requirement (Absolute number of underlying tokens). /// @param minUnderlyingBal_ The new minimum underlying balance. function updateMinUnderlyingBal(uint256 minUnderlyingBal_) external onlyKeeper { minUnderlyingBal = minUnderlyingBal_; } /// @notice Updates the minimum underlying percentage requirement (Expressed as a percentage). /// @param minUnderlyingPerc_ The new minimum underlying percentage. function updateMinUnderlyingPerc(uint256 minUnderlyingPerc_) external onlyKeeper { if (minUnderlyingPerc_ > ONE) { revert InvalidPerc(); } minUnderlyingPerc = minUnderlyingPerc_; } //-------------------------------------------------------------------------- // External & Public write methods /// @inheritdoc IVault /// @dev Simply batches the `recover` and `deploy` functions. Reverts if there are no funds to deploy. function recoverAndRedeploy() external override { recover(); deploy(); } /// @inheritdoc IVault /// @dev Its safer to call `recover` before `deploy` so the full available balance can be deployed. /// The vault holds `minUnderlyingBal` as underlying tokens and deploys the rest. /// Reverts if no funds are rolled over or enforced deployment threshold is not reached. function deploy() public override nonReentrant whenNotPaused { IERC20Upgradeable underlying_ = underlying; IPerpetualTranche perp_ = perp; // `minUnderlyingBal` worth of underlying liquidity is excluded from the usable balance uint256 usableBal = underlying_.balanceOf(address(this)); if (usableBal <= minUnderlyingBal) { revert InsufficientLiquidity(); } usableBal -= minUnderlyingBal; // We ensure that at-least `minDeploymentAmt` amount of underlying tokens are deployed if (usableBal <= minDeploymentAmt) { revert InsufficientDeployment(); } // We tranche all the underlying held by the vault to create seniors and juniors _tranche(perp_.getDepositBond(), underlying_, usableBal); // Newly minted seniors are rolled into perp if (!_rollover(perp_, underlying_)) { revert InsufficientDeployment(); } // sync underlying _syncAsset(underlying); } /// @inheritdoc IVault function recover() public override nonReentrant whenNotPaused { // Redeem deployed tranches uint8 deployedCount_ = uint8(_deployed.length()); if (deployedCount_ <= 0) { return; } // execute redemption on each deployed asset for (uint8 i = 0; i < deployedCount_; ++i) { ITranche tranche = ITranche(_deployed.at(i)); uint256 trancheBalance = tranche.balanceOf(address(this)); // if the vault has no tranche balance, // we continue to the next one. if (trancheBalance <= 0) { continue; } // get the parent bond IBondController bond = IBondController(tranche.bond()); BondTranches memory bt = bond.getTranches(); // if bond has matured, redeem the tranche token if (bond.secondsToMaturity() <= 0) { // execute redemption _execMatureTrancheRedemption(bond, tranche, trancheBalance); } // if not redeem using proportional balances // redeems this tranche and it's siblings if the vault holds balances. // NOTE: For gas optimization, we perform this operation only once // i.e) when we encounter the most-senior tranche. // We also skip if the tranche balance is too low as immature redemption will be a no-op. else if (tranche == bt.tranches[0] && trancheBalance > TRANCHE_DUST_AMT) { // execute redemption _execImmatureTrancheRedemption(bond, bt); } } // sync deployed tranches // NOTE: We traverse the deployed set in the reverse order // as deletions involve swapping the deleted element to the // end of the set and removing the last element. for (uint8 i = deployedCount_; i > 0; i--) { _syncDeployedAsset(IERC20Upgradeable(_deployed.at(i - 1))); } // sync underlying _syncAsset(underlying); } /// @inheritdoc IVault function recover(IERC20Upgradeable token) public override nonReentrant whenNotPaused { if (_deployed.contains(address(token))) { _redeemTranche(ITranche(address(token))); _syncAsset(underlying); return; } IPerpetualTranche perp_ = perp; if (address(token) == address(perp_)) { // In case the vault holds perp tokens after swaps or if transferred in erroneously, // anyone can execute this function to recover perps into tranches. // This is not part of the regular recovery flow. _meldPerps(perp_); _syncAsset(perp_); _syncAsset(underlying); return; } revert UnexpectedAsset(); } /// @inheritdoc IVault function deposit(uint256 underlyingAmtIn) external override nonReentrant whenNotPaused returns (uint256) { // Calculates the fee adjusted amount of notes minted when depositing `underlyingAmtIn` of underlying tokens. // NOTE: This operation should precede any token transfers. uint256 notes = computeMintAmt(underlyingAmtIn); if (underlyingAmtIn <= 0 || notes <= 0) { return 0; } // transfer user assets in underlying.safeTransferFrom(msg.sender, address(this), underlyingAmtIn); // mint notes _mint(msg.sender, notes); // sync underlying _syncAsset(underlying); return notes; } /// @inheritdoc IVault function redeem(uint256 notes) public override nonReentrant whenNotPaused returns (TokenAmount[] memory) { if (notes <= 0) { return new TokenAmount[](0); } // Calculates the fee adjusted share of vault tokens to be redeemed // NOTE: This operation should precede any token transfers. TokenAmount[] memory redemptions = computeRedemptionAmts(notes); // burn notes _burn(msg.sender, notes); // transfer assets out uint8 redemptionsCount = uint8(redemptions.length); for (uint8 i = 0; i < redemptionsCount; ++i) { if (redemptions[i].amount == 0) { continue; } // Transfer token share out redemptions[i].token.safeTransfer(msg.sender, redemptions[i].amount); // sync balances, wkt i=0 is the underlying and remaining are tranches if (i == 0) { _syncAsset(redemptions[i].token); } else { _syncDeployedAsset(redemptions[i].token); } } return redemptions; } /// @inheritdoc IVault function recoverAndRedeem(uint256 notes) external override returns (TokenAmount[] memory) { recover(); return redeem(notes); } /// @inheritdoc IRolloverVault /// @dev Callers should call `recover` before executing `swapUnderlyingForPerps` to maximize vault liquidity. function swapUnderlyingForPerps(uint256 underlyingAmtIn) external nonReentrant whenNotPaused returns (uint256) { // Calculates the fee adjusted perp amount to transfer to the user. // NOTE: This operation should precede any token transfers. IERC20Upgradeable underlying_ = underlying; IPerpetualTranche perp_ = perp; (uint256 perpAmtOut, uint256 perpFeeAmtToBurn, SubscriptionParams memory s) = computeUnderlyingToPerpSwapAmt( underlyingAmtIn ); // Revert if insufficient tokens are swapped in or out if (perpAmtOut <= 0 || underlyingAmtIn <= 0) { revert UnacceptableSwap(); } // transfer underlying in underlying_.safeTransferFrom(msg.sender, address(this), underlyingAmtIn); // tranche and mint perps as needed _trancheAndMintPerps(perp_, underlying_, s.perpTVL, s.seniorTR, perpAmtOut + perpFeeAmtToBurn); // Pay perp's fee share by burning some of the minted perps if (perpFeeAmtToBurn > 0) { IERC20Burnable(address(perp_)).burn(perpFeeAmtToBurn); } // transfer remaining perps out to the user IERC20Upgradeable(address(perp_)).safeTransfer(msg.sender, perpAmtOut); // NOTE: In case this operation mints slightly more perps than that are required for the swap, // The vault continues to hold the perp dust until the subsequent `swapPerpsForUnderlying` or manual `recover(perp)`. // Revert if vault liquidity is too low. _enforceUnderlyingBalAfterSwap(underlying_, s.vaultTVL); // sync underlying _syncAsset(underlying_); return perpAmtOut; } /// @inheritdoc IRolloverVault function swapPerpsForUnderlying(uint256 perpAmtIn) external nonReentrant whenNotPaused returns (uint256) { // Calculates the fee adjusted underlying amount to transfer to the user. IPerpetualTranche perp_ = perp; IERC20Upgradeable underlying_ = underlying; ( uint256 underlyingAmtOut, uint256 perpFeeAmtToBurn, SubscriptionParams memory s ) = computePerpToUnderlyingSwapAmt(perpAmtIn); // Revert if insufficient tokens are swapped in or out if (underlyingAmtOut <= 0 || perpAmtIn <= 0) { revert UnacceptableSwap(); } // transfer perps in IERC20Upgradeable(perp_).safeTransferFrom(msg.sender, address(this), perpAmtIn); // Pay perp's fee share by burning some of the transferred perps if (perpFeeAmtToBurn > 0) { IERC20Burnable(address(perp_)).burn(perpFeeAmtToBurn); } // Meld incoming perps _meldPerps(perp_); // transfer underlying out underlying_.safeTransfer(msg.sender, underlyingAmtOut); // Revert if vault liquidity is too low. _enforceUnderlyingBalAfterSwap(underlying_, s.vaultTVL); // sync underlying _syncAsset(underlying_); return underlyingAmtOut; } //-------------------------------------------------------------------------- // External & Public methods /// @inheritdoc IRolloverVault function computeUnderlyingToPerpSwapAmt( uint256 underlyingAmtIn ) public returns (uint256, uint256, SubscriptionParams memory) { IPerpetualTranche perp_ = perp; // Compute equal value perps to swap out to the user SubscriptionParams memory s = _querySubscriptionState(perp_); uint256 perpAmtOut = underlyingAmtIn.mulDiv(perp_.totalSupply(), s.perpTVL); //----------------------------------------------------------------------------- // When user swaps underlying for vault's perps -> perps are minted by the vault // We thus compute fees based on the post-mint subscription state. uint256 perpFeePerc = feePolicy.computePerpMintFeePerc(); uint256 vaultFeePerc = feePolicy.computeUnderlyingToPerpVaultSwapFeePerc( feePolicy.computeDeviationRatio(s), feePolicy.computeDeviationRatio( SubscriptionParams({ perpTVL: s.perpTVL + underlyingAmtIn, vaultTVL: s.vaultTVL, seniorTR: s.seniorTR }) ) ); //----------------------------------------------------------------------------- // Calculate perp fee share to be paid by the vault uint256 perpFeeAmtToBurn = perpAmtOut.mulDiv(perpFeePerc, FEE_ONE, MathUpgradeable.Rounding.Up); // We deduct fees by transferring out fewer perp tokens perpAmtOut = perpAmtOut.mulDiv(FEE_ONE - (perpFeePerc + vaultFeePerc), FEE_ONE); return (perpAmtOut, perpFeeAmtToBurn, s); } /// @inheritdoc IRolloverVault function computePerpToUnderlyingSwapAmt( uint256 perpAmtIn ) public returns (uint256, uint256, SubscriptionParams memory) { IPerpetualTranche perp_ = perp; // Compute equal value underlying tokens to swap out SubscriptionParams memory s = _querySubscriptionState(perp_); uint256 underlyingAmtOut = perpAmtIn.mulDiv(s.perpTVL, perp_.totalSupply()); //----------------------------------------------------------------------------- // When user swaps perps for vault's underlying -> perps are redeemed by the vault // We thus compute fees based on the post-burn subscription state. uint256 perpFeePerc = feePolicy.computePerpBurnFeePerc(); uint256 vaultFeePerc = feePolicy.computePerpToUnderlyingVaultSwapFeePerc( feePolicy.computeDeviationRatio(s), feePolicy.computeDeviationRatio( SubscriptionParams({ perpTVL: s.perpTVL - underlyingAmtOut, vaultTVL: s.vaultTVL, seniorTR: s.seniorTR }) ) ); //----------------------------------------------------------------------------- // Calculate perp fee share to be paid by the vault uint256 perpFeeAmtToBurn = perpAmtIn.mulDiv(perpFeePerc, FEE_ONE, MathUpgradeable.Rounding.Up); // We deduct fees by transferring out fewer underlying tokens underlyingAmtOut = underlyingAmtOut.mulDiv(FEE_ONE - (perpFeePerc + vaultFeePerc), FEE_ONE); return (underlyingAmtOut, perpFeeAmtToBurn, s); } //-------------------------------------------------------------------------- // External & Public read methods /// @inheritdoc IVault function computeMintAmt(uint256 underlyingAmtIn) public view returns (uint256) { //----------------------------------------------------------------------------- uint256 feePerc = feePolicy.computeVaultMintFeePerc(); //----------------------------------------------------------------------------- // Compute mint amt uint256 noteSupply = totalSupply(); uint256 notes = (noteSupply > 0) ? noteSupply.mulDiv(underlyingAmtIn, getTVL()) : (underlyingAmtIn * INITIAL_RATE); // The mint fees are settled by simply minting fewer vault notes. notes = notes.mulDiv(FEE_ONE - feePerc, FEE_ONE); return notes; } /// @inheritdoc IVault function computeRedemptionAmts(uint256 noteAmtBurnt) public view returns (TokenAmount[] memory) { uint256 noteSupply = totalSupply(); //----------------------------------------------------------------------------- uint256 feePerc = feePolicy.computeVaultBurnFeePerc(); //----------------------------------------------------------------------------- uint8 assetCount_ = 1 + uint8(_deployed.length()); // aggregating vault assets to be redeemed TokenAmount[] memory redemptions = new TokenAmount[](assetCount_); // underlying share to be redeemed IERC20Upgradeable underlying_ = underlying; redemptions[0] = TokenAmount({ token: underlying_, amount: underlying_.balanceOf(address(this)).mulDiv(noteAmtBurnt, noteSupply) }); redemptions[0].amount = redemptions[0].amount.mulDiv(FEE_ONE - feePerc, FEE_ONE); for (uint8 i = 1; i < assetCount_; ++i) { // tranche token share to be redeemed IERC20Upgradeable token = IERC20Upgradeable(_deployed.at(i - 1)); redemptions[i] = TokenAmount({ token: token, amount: token.balanceOf(address(this)).mulDiv(noteAmtBurnt, noteSupply) }); // deduct redemption fee redemptions[i].amount = redemptions[i].amount.mulDiv(FEE_ONE - feePerc, FEE_ONE); // in case the redemption amount is just dust, we skip if (redemptions[i].amount < TRANCHE_DUST_AMT) { redemptions[i].amount = 0; } } return redemptions; } /// @inheritdoc IVault /// @dev The total value is denominated in the underlying asset. function getTVL() public view override returns (uint256) { // The underlying balance uint256 totalValue = underlying.balanceOf(address(this)); // The deployed asset value denominated in the underlying uint8 deployedCount_ = uint8(_deployed.length()); for (uint8 i = 0; i < deployedCount_; ++i) { ITranche tranche = ITranche(_deployed.at(i)); uint256 balance = tranche.balanceOf(address(this)); if (balance > TRANCHE_DUST_AMT) { totalValue += _computeVaultTrancheValue(tranche, underlying, balance); } } return totalValue; } /// @inheritdoc IVault /// @dev The asset value is denominated in the underlying asset. function getVaultAssetValue(IERC20Upgradeable token) external view override returns (uint256) { uint256 balance = token.balanceOf(address(this)); // Underlying asset if (token == underlying) { return balance; } // Deployed asset else if (_deployed.contains(address(token))) { ITranche tranche = ITranche(address(token)); return (balance > TRANCHE_DUST_AMT) ? _computeVaultTrancheValue(tranche, underlying, balance) : 0; } // Not a vault asset, so returning zero return 0; } /// @inheritdoc IVault function assetCount() external view override returns (uint256) { return _deployed.length() + 1; } /// @inheritdoc IVault function assetAt(uint256 i) external view override returns (IERC20Upgradeable) { if (i == 0) { return underlying; } else if (i <= _deployed.length()) { return IERC20Upgradeable(_deployed.at(i - 1)); } revert OutOfBounds(); } /// @inheritdoc IVault function vaultAssetBalance(IERC20Upgradeable token) external view override returns (uint256) { return isVaultAsset(token) ? token.balanceOf(address(this)) : 0; } /// @inheritdoc IVault function isVaultAsset(IERC20Upgradeable token) public view override returns (bool) { return token == underlying || _deployed.contains(address(token)); } //-------------------------------------------------------------------------- // Private write methods /// @dev Redeems tranche tokens held by the vault, for underlying. /// In the case of immature redemption, this method will recover other sibling tranches as well. /// Performs some book-keeping to keep track of the vault's assets. function _redeemTranche(ITranche tranche) private { uint256 trancheBalance = tranche.balanceOf(address(this)); // if the vault has no tranche balance, // we update our internal book-keeping and return. if (trancheBalance <= 0) { _syncDeployedAsset(tranche); return; } // get the parent bond IBondController bond = IBondController(tranche.bond()); // if bond has matured, redeem the tranche token if (bond.secondsToMaturity() <= 0) { // execute redemption _execMatureTrancheRedemption(bond, tranche, trancheBalance); // sync deployed asset _syncDeployedAsset(tranche); } // if not redeem using proportional balances // redeems this tranche and it's siblings if the vault holds balances. // We skip if the tranche balance is too low as immature redemption will be a no-op. else if (trancheBalance > TRANCHE_DUST_AMT) { // execute redemption BondTranches memory bt = bond.getTranches(); _execImmatureTrancheRedemption(bond, bt); // sync deployed asset, i.e) current tranche and its sibling. _syncDeployedAsset(bt.tranches[0]); _syncDeployedAsset(bt.tranches[1]); } else { _syncDeployedAsset(tranche); } } /// @dev Redeems perp tokens held by the vault for tranches and /// melds them with existing tranches to redeem more underlying tokens. /// Performs some book-keeping to keep track of the vault's assets. function _meldPerps(IPerpetualTranche perp_) private { uint256 perpBalance = perp_.balanceOf(address(this)); if (perpBalance <= 0) { return; } TokenAmount[] memory tranchesRedeemed = perp_.redeem(perpBalance); // sync and meld perp's tranches uint8 tranchesRedeemedCount = uint8(tranchesRedeemed.length); for (uint8 i = 1; i < tranchesRedeemedCount; ++i) { ITranche tranche = ITranche(address(tranchesRedeemed[i].token)); // if possible, meld redeemed tranche with // existing tranches to redeem underlying. _redeemTranche(tranche); } } /// @dev Tranches the vault's underlying to mint perps.. /// Performs some book-keeping to keep track of the vault's assets. function _trancheAndMintPerps( IPerpetualTranche perp_, IERC20Upgradeable underlying_, uint256 perpTVL, uint256 seniorTR, uint256 perpAmtToMint ) private { // Tranche as needed IBondController depositBond = perp_.getDepositBond(); ITranche trancheIntoPerp = perp_.getDepositTranche(); (uint256 underylingAmtToTranche, uint256 seniorAmtToDeposit) = PerpHelpers.estimateUnderlyingAmtToTranche( PerpHelpers.MintEstimationParams({ perpTVL: perpTVL, perpSupply: perp_.totalSupply(), depositBondCollateralBalance: underlying_.balanceOf(address(depositBond)), depositBondTotalDebt: depositBond.totalDebt(), depositTrancheSupply: trancheIntoPerp.totalSupply(), depositTrancheTR: seniorTR }), perpAmtToMint ); _tranche(depositBond, underlying_, underylingAmtToTranche); // Mint perps _checkAndApproveMax(trancheIntoPerp, address(perp_), seniorAmtToDeposit); perp_.deposit(trancheIntoPerp, seniorAmtToDeposit); // sync holdings _syncDeployedAsset(trancheIntoPerp); } /// @dev Given a bond and its tranche data, deposits the provided amount into the bond /// and receives tranche tokens in return. /// Performs some book-keeping to keep track of the vault's assets. function _tranche(IBondController bond, IERC20Upgradeable underlying_, uint256 underlyingAmt) private { // Get bond tranches BondTranches memory bt = bond.getTranches(); // amount is tranched _checkAndApproveMax(underlying_, address(bond), underlyingAmt); bond.deposit(underlyingAmt); // sync holdings _syncDeployedAsset(bt.tranches[0]); _syncDeployedAsset(bt.tranches[1]); } /// @dev Rolls over freshly tranched tokens from the given bond for older tranches (close to maturity) from perp. /// Redeems intermediate tranches for underlying if possible. /// Performs some book-keeping to keep track of the vault's assets. /// @return Flag indicating if any tokens were rolled over. function _rollover(IPerpetualTranche perp_, IERC20Upgradeable underlying_) private returns (bool) { // NOTE: The first element of the list is the mature tranche, // there after the list is NOT ordered by maturity. IERC20Upgradeable[] memory rolloverTokens = perp_.getReserveTokensUpForRollover(); // Batch rollover bool rollover = false; // We query perp's current deposit tranche ITranche trancheIntoPerp = perp_.getDepositTranche(); // Compute available tranche in to rollover uint256 trancheInAmtAvailable = trancheIntoPerp.balanceOf(address(this)); // Approve once for all rollovers _checkAndApproveMax(trancheIntoPerp, address(perp_), trancheInAmtAvailable); // We pair the senior tranche token held by the vault (from the deposit bond) // with each of the perp's tokens available for rollovers and execute a rollover. // We continue to rollover till either the vault's senior tranche balance is exhausted or // there are no more tokens in perp available to be rolled-over. uint8 rolloverTokensCount = uint8(rolloverTokens.length); for (uint8 i = 0; (i < rolloverTokensCount && trancheInAmtAvailable > 0); ++i) { // tokenOutOfPerp is the reserve token coming out of perp into the vault IERC20Upgradeable tokenOutOfPerp = rolloverTokens[i]; // Perform rollover RolloverData memory r = perp_.rollover(trancheIntoPerp, tokenOutOfPerp, trancheInAmtAvailable); // no rollover occurred, skip updating balances if (r.tokenOutAmt <= 0) { continue; } // skip insertion into the deployed list the case of the mature tranche, ie underlying if (rolloverTokens[i] != underlying_) { // Clean up after rollover, merge seniors from perp // with vault held juniors to recover more underlying. _redeemTranche(ITranche(address(tokenOutOfPerp))); } // Calculate trancheIn available amount trancheInAmtAvailable -= r.trancheInAmt; // keep track if "at least" one rolled over operation occurred rollover = true; } // Final cleanup, if there remain excess seniors we recover back to underlying. _redeemTranche(trancheIntoPerp); return (rollover); } /// @dev Low level method that redeems the given mature tranche for the underlying asset. /// It interacts with the button-wood bond contract. /// This function should NOT be called directly, use `recover()` or `_redeemTranche(tranche)` /// which wrap this function with the internal book-keeping necessary, /// to keep track of the vault's assets. function _execMatureTrancheRedemption(IBondController bond, ITranche tranche, uint256 amount) private { if (!bond.isMature()) { bond.mature(); } bond.redeemMature(address(tranche), amount); } /// @dev Low level method that redeems the given tranche for the underlying asset, before maturity. /// If the vault holds sibling tranches with proportional balances, those will also get redeemed. /// It interacts with the button-wood bond contract. /// This function should NOT be called directly, use `recover()` or `recover(tranche)` /// which wrap this function with the internal book-keeping necessary, /// to keep track of the vault's assets. function _execImmatureTrancheRedemption(IBondController bond, BondTranches memory bt) private { uint256[] memory trancheAmts = bt.computeRedeemableTrancheAmounts(address(this)); // NOTE: It is guaranteed that if one tranche amount is zero, all amounts are zeros. if (trancheAmts[0] > 0) { bond.redeem(trancheAmts); } } /// @dev Syncs balance and updates the deployed list based on the vault's token balance. function _syncDeployedAsset(IERC20Upgradeable token) private { uint256 balance = token.balanceOf(address(this)); emit AssetSynced(token, balance); bool inVault = _deployed.contains(address(token)); if (balance > 0 && !inVault) { // Inserts new token into the deployed assets list. _deployed.add(address(token)); if (_deployed.length() > MAX_DEPLOYED_COUNT) { revert DeployedCountOverLimit(); } } else if (balance <= 0 && inVault) { // Removes token into the deployed assets list. _deployed.remove(address(token)); } } /// @dev Logs the token balance held by the vault. function _syncAsset(IERC20Upgradeable token) private { emit AssetSynced(token, token.balanceOf(address(this))); } /// @dev Checks if the spender has sufficient allowance. If not, approves the maximum possible amount. function _checkAndApproveMax(IERC20Upgradeable token, address spender, uint256 amount) private { uint256 allowance = token.allowance(address(this), spender); if (allowance < amount) { token.safeApprove(spender, type(uint256).max); } } /// @dev Queries the current subscription state of the perp and vault systems. function _querySubscriptionState(IPerpetualTranche perp_) private returns (SubscriptionParams memory) { return SubscriptionParams({ perpTVL: perp_.getTVL(), vaultTVL: getTVL(), seniorTR: perp_.getDepositTrancheRatio() }); } //-------------------------------------------------------------------------- // Private methods /// @dev Computes the value of the given amount of tranche tokens, based on it's current CDR. /// Value is denominated in the underlying collateral. function _computeVaultTrancheValue( ITranche tranche, IERC20Upgradeable collateralToken, uint256 trancheAmt ) private view returns (uint256) { (uint256 trancheClaim, uint256 trancheSupply) = tranche.getTrancheCollateralization(collateralToken); return trancheClaim.mulDiv(trancheAmt, trancheSupply, MathUpgradeable.Rounding.Up); } /// @dev Checks if the vault's underlying balance is above admin defined constraints. /// - Absolute balance is strictly greater than `minUnderlyingBal`. /// - Ratio of the balance to the vault's TVL is strictly greater than `minUnderlyingPerc`. /// NOTE: We assume the vault TVL and the underlying to have the same base denomination. function _enforceUnderlyingBalAfterSwap(IERC20Upgradeable underlying_, uint256 vaultTVL) private view { uint256 underlyingBal = underlying_.balanceOf(address(this)); if (underlyingBal <= minUnderlyingBal || underlyingBal.mulDiv(ONE, vaultTVL) <= minUnderlyingPerc) { revert InsufficientLiquidity(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import {Initializable} from "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal onlyInitializing { __Ownable_init_unchained(); } function __Ownable_init_unchained() internal onlyInitializing { _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); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized != type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/ContextUpgradeable.sol"; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract PausableUpgradeable is Initializable, ContextUpgradeable { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ function __Pausable_init() internal onlyInitializing { __Pausable_init_unchained(); } function __Pausable_init_unchained() internal onlyInitializing { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { require(paused(), "Pausable: not paused"); } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @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 ReentrancyGuardUpgradeable is Initializable { // 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; function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { _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; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20Upgradeable.sol"; import "./extensions/IERC20MetadataUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import {Initializable} from "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the default value returned by this function, unless * it's overridden. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer(address from, address to, uint256 amount) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 amount) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {} /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[45] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol) pragma solidity ^0.8.0; import "../ERC20Upgradeable.sol"; import "../../../utils/ContextUpgradeable.sol"; import {Initializable} from "../../../proxy/utils/Initializable.sol"; /** * @dev Extension of {ERC20} that allows token holders to destroy both their own * tokens and those that they have an allowance for, in a way that can be * recognized off-chain (via event analysis). */ abstract contract ERC20BurnableUpgradeable is Initializable, ContextUpgradeable, ERC20Upgradeable { function __ERC20Burnable_init() internal onlyInitializing { } function __ERC20Burnable_init_unchained() internal onlyInitializing { } /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { _spendAllowance(account, _msgSender(), amount); _burn(account, amount); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (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. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20PermitUpgradeable { /** * @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]. * * CAUTION: See Security Considerations above. */ 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/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @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 v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; import "../extensions/IERC20PermitUpgradeable.sol"; import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable { using AddressUpgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20Upgradeable 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( IERC20PermitUpgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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))) && AddressUpgradeable.isContract(address(token)); } }
// 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 AddressUpgradeable { /** * @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 (last updated v4.9.4) (utils/Context.sol) pragma solidity ^0.8.0; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @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 ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// 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 MathUpgradeable { 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 v4.8.0) (utils/math/SafeCast.sol) // This file was procedurally generated from scripts/generate/templates/SafeCast.js. pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCastUpgradeable { /** * @dev Returns the downcasted uint248 from uint256, reverting on * overflow (when the input is greater than largest uint248). * * Counterpart to Solidity's `uint248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toUint248(uint256 value) internal pure returns (uint248) { require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits"); return uint248(value); } /** * @dev Returns the downcasted uint240 from uint256, reverting on * overflow (when the input is greater than largest uint240). * * Counterpart to Solidity's `uint240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toUint240(uint256 value) internal pure returns (uint240) { require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits"); return uint240(value); } /** * @dev Returns the downcasted uint232 from uint256, reverting on * overflow (when the input is greater than largest uint232). * * Counterpart to Solidity's `uint232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toUint232(uint256 value) internal pure returns (uint232) { require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits"); return uint232(value); } /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.2._ */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint216 from uint256, reverting on * overflow (when the input is greater than largest uint216). * * Counterpart to Solidity's `uint216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toUint216(uint256 value) internal pure returns (uint216) { require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits"); return uint216(value); } /** * @dev Returns the downcasted uint208 from uint256, reverting on * overflow (when the input is greater than largest uint208). * * Counterpart to Solidity's `uint208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toUint208(uint256 value) internal pure returns (uint208) { require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits"); return uint208(value); } /** * @dev Returns the downcasted uint200 from uint256, reverting on * overflow (when the input is greater than largest uint200). * * Counterpart to Solidity's `uint200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toUint200(uint256 value) internal pure returns (uint200) { require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits"); return uint200(value); } /** * @dev Returns the downcasted uint192 from uint256, reverting on * overflow (when the input is greater than largest uint192). * * Counterpart to Solidity's `uint192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toUint192(uint256 value) internal pure returns (uint192) { require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits"); return uint192(value); } /** * @dev Returns the downcasted uint184 from uint256, reverting on * overflow (when the input is greater than largest uint184). * * Counterpart to Solidity's `uint184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toUint184(uint256 value) internal pure returns (uint184) { require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits"); return uint184(value); } /** * @dev Returns the downcasted uint176 from uint256, reverting on * overflow (when the input is greater than largest uint176). * * Counterpart to Solidity's `uint176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toUint176(uint256 value) internal pure returns (uint176) { require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits"); return uint176(value); } /** * @dev Returns the downcasted uint168 from uint256, reverting on * overflow (when the input is greater than largest uint168). * * Counterpart to Solidity's `uint168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toUint168(uint256 value) internal pure returns (uint168) { require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits"); return uint168(value); } /** * @dev Returns the downcasted uint160 from uint256, reverting on * overflow (when the input is greater than largest uint160). * * Counterpart to Solidity's `uint160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toUint160(uint256 value) internal pure returns (uint160) { require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits"); return uint160(value); } /** * @dev Returns the downcasted uint152 from uint256, reverting on * overflow (when the input is greater than largest uint152). * * Counterpart to Solidity's `uint152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toUint152(uint256 value) internal pure returns (uint152) { require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits"); return uint152(value); } /** * @dev Returns the downcasted uint144 from uint256, reverting on * overflow (when the input is greater than largest uint144). * * Counterpart to Solidity's `uint144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toUint144(uint256 value) internal pure returns (uint144) { require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits"); return uint144(value); } /** * @dev Returns the downcasted uint136 from uint256, reverting on * overflow (when the input is greater than largest uint136). * * Counterpart to Solidity's `uint136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toUint136(uint256 value) internal pure returns (uint136) { require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits"); return uint136(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v2.5._ */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint120 from uint256, reverting on * overflow (when the input is greater than largest uint120). * * Counterpart to Solidity's `uint120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toUint120(uint256 value) internal pure returns (uint120) { require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits"); return uint120(value); } /** * @dev Returns the downcasted uint112 from uint256, reverting on * overflow (when the input is greater than largest uint112). * * Counterpart to Solidity's `uint112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toUint112(uint256 value) internal pure returns (uint112) { require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits"); return uint112(value); } /** * @dev Returns the downcasted uint104 from uint256, reverting on * overflow (when the input is greater than largest uint104). * * Counterpart to Solidity's `uint104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toUint104(uint256 value) internal pure returns (uint104) { require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits"); return uint104(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.2._ */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint88 from uint256, reverting on * overflow (when the input is greater than largest uint88). * * Counterpart to Solidity's `uint88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toUint88(uint256 value) internal pure returns (uint88) { require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits"); return uint88(value); } /** * @dev Returns the downcasted uint80 from uint256, reverting on * overflow (when the input is greater than largest uint80). * * Counterpart to Solidity's `uint80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toUint80(uint256 value) internal pure returns (uint80) { require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits"); return uint80(value); } /** * @dev Returns the downcasted uint72 from uint256, reverting on * overflow (when the input is greater than largest uint72). * * Counterpart to Solidity's `uint72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toUint72(uint256 value) internal pure returns (uint72) { require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits"); return uint72(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v2.5._ */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint56 from uint256, reverting on * overflow (when the input is greater than largest uint56). * * Counterpart to Solidity's `uint56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toUint56(uint256 value) internal pure returns (uint56) { require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits"); return uint56(value); } /** * @dev Returns the downcasted uint48 from uint256, reverting on * overflow (when the input is greater than largest uint48). * * Counterpart to Solidity's `uint48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toUint48(uint256 value) internal pure returns (uint48) { require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits"); return uint48(value); } /** * @dev Returns the downcasted uint40 from uint256, reverting on * overflow (when the input is greater than largest uint40). * * Counterpart to Solidity's `uint40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toUint40(uint256 value) internal pure returns (uint40) { require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits"); return uint40(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v2.5._ */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint24 from uint256, reverting on * overflow (when the input is greater than largest uint24). * * Counterpart to Solidity's `uint24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toUint24(uint256 value) internal pure returns (uint24) { require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits"); return uint24(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v2.5._ */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v2.5._ */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. * * _Available since v3.0._ */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int248 from int256, reverting on * overflow (when the input is less than smallest int248 or * greater than largest int248). * * Counterpart to Solidity's `int248` operator. * * Requirements: * * - input must fit into 248 bits * * _Available since v4.7._ */ function toInt248(int256 value) internal pure returns (int248 downcasted) { downcasted = int248(value); require(downcasted == value, "SafeCast: value doesn't fit in 248 bits"); } /** * @dev Returns the downcasted int240 from int256, reverting on * overflow (when the input is less than smallest int240 or * greater than largest int240). * * Counterpart to Solidity's `int240` operator. * * Requirements: * * - input must fit into 240 bits * * _Available since v4.7._ */ function toInt240(int256 value) internal pure returns (int240 downcasted) { downcasted = int240(value); require(downcasted == value, "SafeCast: value doesn't fit in 240 bits"); } /** * @dev Returns the downcasted int232 from int256, reverting on * overflow (when the input is less than smallest int232 or * greater than largest int232). * * Counterpart to Solidity's `int232` operator. * * Requirements: * * - input must fit into 232 bits * * _Available since v4.7._ */ function toInt232(int256 value) internal pure returns (int232 downcasted) { downcasted = int232(value); require(downcasted == value, "SafeCast: value doesn't fit in 232 bits"); } /** * @dev Returns the downcasted int224 from int256, reverting on * overflow (when the input is less than smallest int224 or * greater than largest int224). * * Counterpart to Solidity's `int224` operator. * * Requirements: * * - input must fit into 224 bits * * _Available since v4.7._ */ function toInt224(int256 value) internal pure returns (int224 downcasted) { downcasted = int224(value); require(downcasted == value, "SafeCast: value doesn't fit in 224 bits"); } /** * @dev Returns the downcasted int216 from int256, reverting on * overflow (when the input is less than smallest int216 or * greater than largest int216). * * Counterpart to Solidity's `int216` operator. * * Requirements: * * - input must fit into 216 bits * * _Available since v4.7._ */ function toInt216(int256 value) internal pure returns (int216 downcasted) { downcasted = int216(value); require(downcasted == value, "SafeCast: value doesn't fit in 216 bits"); } /** * @dev Returns the downcasted int208 from int256, reverting on * overflow (when the input is less than smallest int208 or * greater than largest int208). * * Counterpart to Solidity's `int208` operator. * * Requirements: * * - input must fit into 208 bits * * _Available since v4.7._ */ function toInt208(int256 value) internal pure returns (int208 downcasted) { downcasted = int208(value); require(downcasted == value, "SafeCast: value doesn't fit in 208 bits"); } /** * @dev Returns the downcasted int200 from int256, reverting on * overflow (when the input is less than smallest int200 or * greater than largest int200). * * Counterpart to Solidity's `int200` operator. * * Requirements: * * - input must fit into 200 bits * * _Available since v4.7._ */ function toInt200(int256 value) internal pure returns (int200 downcasted) { downcasted = int200(value); require(downcasted == value, "SafeCast: value doesn't fit in 200 bits"); } /** * @dev Returns the downcasted int192 from int256, reverting on * overflow (when the input is less than smallest int192 or * greater than largest int192). * * Counterpart to Solidity's `int192` operator. * * Requirements: * * - input must fit into 192 bits * * _Available since v4.7._ */ function toInt192(int256 value) internal pure returns (int192 downcasted) { downcasted = int192(value); require(downcasted == value, "SafeCast: value doesn't fit in 192 bits"); } /** * @dev Returns the downcasted int184 from int256, reverting on * overflow (when the input is less than smallest int184 or * greater than largest int184). * * Counterpart to Solidity's `int184` operator. * * Requirements: * * - input must fit into 184 bits * * _Available since v4.7._ */ function toInt184(int256 value) internal pure returns (int184 downcasted) { downcasted = int184(value); require(downcasted == value, "SafeCast: value doesn't fit in 184 bits"); } /** * @dev Returns the downcasted int176 from int256, reverting on * overflow (when the input is less than smallest int176 or * greater than largest int176). * * Counterpart to Solidity's `int176` operator. * * Requirements: * * - input must fit into 176 bits * * _Available since v4.7._ */ function toInt176(int256 value) internal pure returns (int176 downcasted) { downcasted = int176(value); require(downcasted == value, "SafeCast: value doesn't fit in 176 bits"); } /** * @dev Returns the downcasted int168 from int256, reverting on * overflow (when the input is less than smallest int168 or * greater than largest int168). * * Counterpart to Solidity's `int168` operator. * * Requirements: * * - input must fit into 168 bits * * _Available since v4.7._ */ function toInt168(int256 value) internal pure returns (int168 downcasted) { downcasted = int168(value); require(downcasted == value, "SafeCast: value doesn't fit in 168 bits"); } /** * @dev Returns the downcasted int160 from int256, reverting on * overflow (when the input is less than smallest int160 or * greater than largest int160). * * Counterpart to Solidity's `int160` operator. * * Requirements: * * - input must fit into 160 bits * * _Available since v4.7._ */ function toInt160(int256 value) internal pure returns (int160 downcasted) { downcasted = int160(value); require(downcasted == value, "SafeCast: value doesn't fit in 160 bits"); } /** * @dev Returns the downcasted int152 from int256, reverting on * overflow (when the input is less than smallest int152 or * greater than largest int152). * * Counterpart to Solidity's `int152` operator. * * Requirements: * * - input must fit into 152 bits * * _Available since v4.7._ */ function toInt152(int256 value) internal pure returns (int152 downcasted) { downcasted = int152(value); require(downcasted == value, "SafeCast: value doesn't fit in 152 bits"); } /** * @dev Returns the downcasted int144 from int256, reverting on * overflow (when the input is less than smallest int144 or * greater than largest int144). * * Counterpart to Solidity's `int144` operator. * * Requirements: * * - input must fit into 144 bits * * _Available since v4.7._ */ function toInt144(int256 value) internal pure returns (int144 downcasted) { downcasted = int144(value); require(downcasted == value, "SafeCast: value doesn't fit in 144 bits"); } /** * @dev Returns the downcasted int136 from int256, reverting on * overflow (when the input is less than smallest int136 or * greater than largest int136). * * Counterpart to Solidity's `int136` operator. * * Requirements: * * - input must fit into 136 bits * * _Available since v4.7._ */ function toInt136(int256 value) internal pure returns (int136 downcasted) { downcasted = int136(value); require(downcasted == value, "SafeCast: value doesn't fit in 136 bits"); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128 downcasted) { downcasted = int128(value); require(downcasted == value, "SafeCast: value doesn't fit in 128 bits"); } /** * @dev Returns the downcasted int120 from int256, reverting on * overflow (when the input is less than smallest int120 or * greater than largest int120). * * Counterpart to Solidity's `int120` operator. * * Requirements: * * - input must fit into 120 bits * * _Available since v4.7._ */ function toInt120(int256 value) internal pure returns (int120 downcasted) { downcasted = int120(value); require(downcasted == value, "SafeCast: value doesn't fit in 120 bits"); } /** * @dev Returns the downcasted int112 from int256, reverting on * overflow (when the input is less than smallest int112 or * greater than largest int112). * * Counterpart to Solidity's `int112` operator. * * Requirements: * * - input must fit into 112 bits * * _Available since v4.7._ */ function toInt112(int256 value) internal pure returns (int112 downcasted) { downcasted = int112(value); require(downcasted == value, "SafeCast: value doesn't fit in 112 bits"); } /** * @dev Returns the downcasted int104 from int256, reverting on * overflow (when the input is less than smallest int104 or * greater than largest int104). * * Counterpart to Solidity's `int104` operator. * * Requirements: * * - input must fit into 104 bits * * _Available since v4.7._ */ function toInt104(int256 value) internal pure returns (int104 downcasted) { downcasted = int104(value); require(downcasted == value, "SafeCast: value doesn't fit in 104 bits"); } /** * @dev Returns the downcasted int96 from int256, reverting on * overflow (when the input is less than smallest int96 or * greater than largest int96). * * Counterpart to Solidity's `int96` operator. * * Requirements: * * - input must fit into 96 bits * * _Available since v4.7._ */ function toInt96(int256 value) internal pure returns (int96 downcasted) { downcasted = int96(value); require(downcasted == value, "SafeCast: value doesn't fit in 96 bits"); } /** * @dev Returns the downcasted int88 from int256, reverting on * overflow (when the input is less than smallest int88 or * greater than largest int88). * * Counterpart to Solidity's `int88` operator. * * Requirements: * * - input must fit into 88 bits * * _Available since v4.7._ */ function toInt88(int256 value) internal pure returns (int88 downcasted) { downcasted = int88(value); require(downcasted == value, "SafeCast: value doesn't fit in 88 bits"); } /** * @dev Returns the downcasted int80 from int256, reverting on * overflow (when the input is less than smallest int80 or * greater than largest int80). * * Counterpart to Solidity's `int80` operator. * * Requirements: * * - input must fit into 80 bits * * _Available since v4.7._ */ function toInt80(int256 value) internal pure returns (int80 downcasted) { downcasted = int80(value); require(downcasted == value, "SafeCast: value doesn't fit in 80 bits"); } /** * @dev Returns the downcasted int72 from int256, reverting on * overflow (when the input is less than smallest int72 or * greater than largest int72). * * Counterpart to Solidity's `int72` operator. * * Requirements: * * - input must fit into 72 bits * * _Available since v4.7._ */ function toInt72(int256 value) internal pure returns (int72 downcasted) { downcasted = int72(value); require(downcasted == value, "SafeCast: value doesn't fit in 72 bits"); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64 downcasted) { downcasted = int64(value); require(downcasted == value, "SafeCast: value doesn't fit in 64 bits"); } /** * @dev Returns the downcasted int56 from int256, reverting on * overflow (when the input is less than smallest int56 or * greater than largest int56). * * Counterpart to Solidity's `int56` operator. * * Requirements: * * - input must fit into 56 bits * * _Available since v4.7._ */ function toInt56(int256 value) internal pure returns (int56 downcasted) { downcasted = int56(value); require(downcasted == value, "SafeCast: value doesn't fit in 56 bits"); } /** * @dev Returns the downcasted int48 from int256, reverting on * overflow (when the input is less than smallest int48 or * greater than largest int48). * * Counterpart to Solidity's `int48` operator. * * Requirements: * * - input must fit into 48 bits * * _Available since v4.7._ */ function toInt48(int256 value) internal pure returns (int48 downcasted) { downcasted = int48(value); require(downcasted == value, "SafeCast: value doesn't fit in 48 bits"); } /** * @dev Returns the downcasted int40 from int256, reverting on * overflow (when the input is less than smallest int40 or * greater than largest int40). * * Counterpart to Solidity's `int40` operator. * * Requirements: * * - input must fit into 40 bits * * _Available since v4.7._ */ function toInt40(int256 value) internal pure returns (int40 downcasted) { downcasted = int40(value); require(downcasted == value, "SafeCast: value doesn't fit in 40 bits"); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32 downcasted) { downcasted = int32(value); require(downcasted == value, "SafeCast: value doesn't fit in 32 bits"); } /** * @dev Returns the downcasted int24 from int256, reverting on * overflow (when the input is less than smallest int24 or * greater than largest int24). * * Counterpart to Solidity's `int24` operator. * * Requirements: * * - input must fit into 24 bits * * _Available since v4.7._ */ function toInt24(int256 value) internal pure returns (int24 downcasted) { downcasted = int24(value); require(downcasted == value, "SafeCast: value doesn't fit in 24 bits"); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16 downcasted) { downcasted = int16(value); require(downcasted == value, "SafeCast: value doesn't fit in 16 bits"); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8 downcasted) { downcasted = int8(value); require(downcasted == value, "SafeCast: value doesn't fit in 8 bits"); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. * * _Available since v3.0._ */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ```solidity * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSetUpgradeable { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { ITranche } from "./ITranche.sol"; interface IBondController { function collateralToken() external view returns (address); function maturityDate() external view returns (uint256); function creationDate() external view returns (uint256); function totalDebt() external view returns (uint256); function feeBps() external view returns (uint256); function isMature() external view returns (bool); function tranches(uint256 i) external view returns (ITranche token, uint256 ratio); function trancheCount() external view returns (uint256 count); function trancheTokenAddresses(ITranche token) external view returns (bool); function deposit(uint256 amount) external; function redeem(uint256[] memory amounts) external; function mature() external; function redeemMature(address tranche, uint256 amount) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; interface ITranche is IERC20Upgradeable { function bond() external view returns (address); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.0; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; struct TokenAmount { /// @notice The asset token redeemed. IERC20Upgradeable token; /// @notice The amount redeemed. uint256 amount; } /// @notice The system subscription parameters. struct SubscriptionParams { /// @notice The current TVL of perp denominated in the underlying. uint256 perpTVL; /// @notice The current TVL of the vault denominated in the underlying. uint256 vaultTVL; /// @notice The tranche ratio of seniors accepted by perp. uint256 seniorTR; } struct RolloverData { /// @notice The amount of tokens rolled out. uint256 tokenOutAmt; /// @notice The amount of trancheIn tokens rolled in. uint256 trancheInAmt; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IBondController } from "./buttonwood/IBondController.sol"; interface IBondIssuer { /// @notice Event emitted when a new bond is issued by the issuer. /// @param bond The newly issued bond. event BondIssued(IBondController bond); /// @notice Event emitted when a bond has matured. /// @param bond The matured bond. event BondMature(IBondController bond); /// @notice The address of the underlying collateral token to be used for issued bonds. /// @return Address of the collateral token. function collateral() external view returns (address); /// @notice Invokes `mature` on issued active bonds. function matureActive() external; /// @notice Issues a new bond if sufficient time has elapsed since the last issue. function issue() external; /// @notice Checks if a given bond has been issued by the issuer. /// @param bond Address of the bond to check. /// @return if the bond has been issued by the issuer. function isInstance(IBondController bond) external view returns (bool); /// @notice Fetches the most recently issued bond. /// @return Address of the most recent bond. function getLatestBond() external returns (IBondController); /// @notice Returns the total number of bonds issued by this issuer. /// @return Number of bonds. function issuedCount() external view returns (uint256); /// @notice The bond address from the issued list by index. /// @param index The index of the bond in the issued list. /// @return Address of the bond. function issuedBondAt(uint256 index) external view returns (IBondController); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; interface IERC20Burnable { function burn(uint256 value) external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { SubscriptionParams } from "./CommonTypes.sol"; interface IFeePolicy { /// @return The percentage of the mint perp tokens to be charged as fees, /// as a fixed-point number with {DECIMALS} decimal places. function computePerpMintFeePerc() external view returns (uint256); /// @return The percentage of the burnt perp tokens to be charged as fees, /// as a fixed-point number with {DECIMALS} decimal places. function computePerpBurnFeePerc() external view returns (uint256); /// @param dr The current system deviation ratio. /// @return The applied exchange rate adjustment between tranches into perp and /// tokens out of perp during a rollover, /// as a fixed-point number with {DECIMALS} decimal places. /// @dev - A fee of 0%, implies the rollover exchange rate is unaltered. /// example) 100 tranchesIn for 100 tranchesOut /// - A fee of 1%, implies the exchange rate is adjusted in favor of tranchesIn. /// example) 100 tranchesIn for 99 tranchesOut; i.e) perp enrichment /// - A fee of -1%, implies the exchange rate is adjusted in favor of tranchesOut. /// example) 99 tranchesIn for 100 tranchesOut function computePerpRolloverFeePerc(uint256 dr) external view returns (int256); /// @return The percentage of the mint vault note amount to be charged as fees, /// as a fixed-point number with {DECIMALS} decimal places. function computeVaultMintFeePerc() external view returns (uint256); /// @return The percentage of the burnt vault note amount to be charged as fees, /// as a fixed-point number with {DECIMALS} decimal places. function computeVaultBurnFeePerc() external view returns (uint256); /// @param dr The current system deviation ratio. /// @param dr_ The deviation ratio of the system after the operation is complete. /// @return The percentage of perp tokens out to be charged as swap fees by the vault, /// as a fixed-point numbers with {DECIMALS} decimal places. function computeUnderlyingToPerpVaultSwapFeePerc(uint256 dr, uint256 dr_) external view returns (uint256); /// @param dr The current system deviation ratio. /// @param dr_ The deviation ratio of the system after the operation is complete. /// @return The percentage of underlying tokens out to be charged as swap fees by the vault, /// as a fixed-point numbers with {DECIMALS} decimal places. function computePerpToUnderlyingVaultSwapFeePerc(uint256 dr, uint256 dr_) external view returns (uint256); /// @return Number of decimals representing a multiplier of 1.0. So, 100% = 1*10**decimals. function decimals() external view returns (uint8); /// @param s The subscription parameters of both the perp and vault systems. /// @return The deviation ratio given the system subscription parameters. function computeDeviationRatio(SubscriptionParams memory s) external view returns (uint256); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; import { IBondIssuer } from "./IBondIssuer.sol"; import { IFeePolicy } from "./IFeePolicy.sol"; import { IBondController } from "./buttonwood/IBondController.sol"; import { ITranche } from "./buttonwood/ITranche.sol"; import { IRolloverVault } from "./IRolloverVault.sol"; import { TokenAmount, RolloverData } from "./CommonTypes.sol"; interface IPerpetualTranche is IERC20Upgradeable { //-------------------------------------------------------------------------- // Events /// @notice Event emitted the reserve's current token balance is recorded after change. /// @param token Address of token. /// @param balance The recorded ERC-20 balance of the token held by the reserve. event ReserveSynced(IERC20Upgradeable token, uint256 balance); /// @notice Event emitted when the active deposit bond is updated. /// @param bond Address of the new deposit bond. event UpdatedDepositBond(IBondController bond); //-------------------------------------------------------------------------- // Methods /// @notice Deposits tranche tokens into the system and mint perp tokens. /// @param trancheIn The address of the tranche token to be deposited. /// @param trancheInAmt The amount of tranche tokens deposited. /// @return The amount of perp tokens minted. function deposit(ITranche trancheIn, uint256 trancheInAmt) external returns (uint256); /// @notice Burn perp tokens and redeem the share of reserve assets. /// @param perpAmtBurnt The amount of perp tokens burnt from the caller. /// @return tokensOut The list of reserve tokens and amounts redeemed. function redeem(uint256 perpAmtBurnt) external returns (TokenAmount[] memory tokensOut); /// @notice Rotates newer tranches in for reserve tokens. /// @param trancheIn The tranche token deposited. /// @param tokenOut The reserve token to be redeemed. /// @param trancheInAmt The amount of trancheIn tokens deposited. /// @return r The rollover amounts in various denominations. function rollover( ITranche trancheIn, IERC20Upgradeable tokenOut, uint256 trancheInAmt ) external returns (RolloverData memory r); /// @notice External contract that stores a predefined bond config and frequency, /// and issues new bonds when poked. /// @return The address of the bond issuer. function bondIssuer() external view returns (IBondIssuer); /// @notice Reference to the address that has the ability to pause/unpause operations. /// @return The address of the keeper. function keeper() external view returns (address); /// @notice The address of the underlying rebasing ERC-20 collateral token backing the tranches. /// @return Address of the underlying collateral token. function underlying() external view returns (IERC20Upgradeable); /// @return Address of perp's rollover vault. function vault() external view returns (IRolloverVault); /// @notice The parent bond whose tranches are currently accepted to mint perp tokens. /// @return Address of the deposit bond. function getDepositBond() external returns (IBondController); /// @notice The tranche token contract currently accepted to mint perp tokens. /// @return Address of the deposit tranche ERC-20 token. function getDepositTranche() external returns (ITranche); /// @return The tranche ratio of the current deposit tranche. function getDepositTrancheRatio() external returns (uint256); /// @notice The policy contract with the fee computation logic for the perp and vault systems. /// @return Address of the policy contract. function feePolicy() external view returns (IFeePolicy); /// @notice Total count of tokens held in the reserve. /// @return The reserve token count. function getReserveCount() external returns (uint256); /// @notice The token address from the reserve list by index. /// @param index The index of a token. /// @return The reserve token address. function getReserveAt(uint256 index) external returns (IERC20Upgradeable); /// @notice Checks if the given token is part of the reserve. /// @param token The address of a token to check. /// @return If the token is part of the reserve. function inReserve(IERC20Upgradeable token) external returns (bool); /// @notice Fetches the reserve's token balance. /// @param token The address of the tranche token held by the reserve. /// @return The ERC-20 balance of the reserve token. function getReserveTokenBalance(IERC20Upgradeable token) external returns (uint256); /// @notice Calculates the reserve's token value, /// in a standard denomination as defined by the implementation. /// @param token The address of the tranche token held by the reserve. /// @return The value of the reserve token balance held by the reserve, in a standard denomination. function getReserveTokenValue(IERC20Upgradeable token) external returns (uint256); /// @notice Computes the total value of assets currently held in the reserve. /// @return The total value of the perp system, in a standard denomination. function getTVL() external returns (uint256); /// @notice Fetches the list of reserve tokens which are up for rollover. /// @return The list of reserve tokens up for rollover. function getReserveTokensUpForRollover() external returns (IERC20Upgradeable[] memory); /// @notice Computes the amount of perp tokens minted when `trancheInAmt` `trancheIn` tokens /// are deposited into the system. /// @param trancheIn The tranche token deposited. /// @param trancheInAmt The amount of tranche tokens deposited. /// @return The amount of perp tokens to be minted. function computeMintAmt(ITranche trancheIn, uint256 trancheInAmt) external returns (uint256); /// @notice Computes the amount reserve tokens redeemed when burning given number of perp tokens. /// @param perpAmtBurnt The amount of perp tokens to be burnt. /// @return tokensOut The list of reserve tokens and amounts redeemed. function computeRedemptionAmts(uint256 perpAmtBurnt) external returns (TokenAmount[] memory tokensOut); /// @notice Computes the amount reserve tokens that are rolled out for the given number /// of `trancheIn` tokens rolled in. /// @param trancheIn The tranche token rolled in. /// @param tokenOut The reserve token to be rolled out. /// @param trancheInAmtAvailable The amount of trancheIn tokens rolled in. /// @return r The rollover amounts in various denominations. function computeRolloverAmt( ITranche trancheIn, IERC20Upgradeable tokenOut, uint256 trancheInAmtAvailable ) external returns (RolloverData memory r); /// @notice Updates time dependent storage state. function updateState() external; }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IVault } from "./IVault.sol"; import { SubscriptionParams } from "./CommonTypes.sol"; interface IRolloverVault is IVault { /// @notice Allows users to swap their underlying tokens for perps held by the vault. /// @param underlyingAmtIn The amount of underlying tokens swapped in. /// @return The amount of perp tokens swapped out. function swapUnderlyingForPerps(uint256 underlyingAmtIn) external returns (uint256); /// @notice Allows users to swap their perp tokens for underlying tokens held by the vault. /// @param perpAmtIn The amount of perp tokens swapped in. /// @return The amount of underlying tokens swapped out. function swapPerpsForUnderlying(uint256 perpAmtIn) external returns (uint256); /// @notice Computes the amount of perp tokens that are returned when user swaps a given number of underlying tokens. /// @param underlyingAmtIn The number of underlying tokens the user swaps in. /// @return perpAmtOut The number of perp tokens returned to the user. /// @return perpFeeAmtToBurn The amount of perp tokens to be paid to the perp contract as mint fees. /// @return s The pre-swap perp and vault subscription state. function computeUnderlyingToPerpSwapAmt( uint256 underlyingAmtIn ) external returns (uint256, uint256, SubscriptionParams memory); /// @notice Computes the amount of underlying tokens that are returned when user swaps a given number of perp tokens. /// @param perpAmtIn The number of perp tokens the user swaps in. /// @return underlyingAmtOut The number of underlying tokens returned to the user. /// @return perpFeeAmtToBurn The amount of perp tokens to be paid to the perp contract as burn fees. /// @return s The pre-swap perp and vault subscription state. function computePerpToUnderlyingSwapAmt( uint256 perpAmtIn ) external returns (uint256, uint256, SubscriptionParams memory); }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.0; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; import { TokenAmount } from "./CommonTypes.sol"; /* * @title IVault * * @notice The standard interface for a generic vault as described by the "Vault Framework". * http://thinking.farm/essays/2022-10-05-mechanical-finance/ * * Users deposit a "underlying" asset and mint "notes" (or vault shares). * The vault "deploys" underlying asset in a rules-based fashion (through a hard-coded strategy). * It "recovers" deployed assets once the investment matures. * * The vault operates through two external poke functions which off-chain keepers can execute. * 1) `deploy`: When executed, the vault "puts to work" the underlying assets it holds. The vault * usually returns other ERC-20 tokens which act as receipts of the deployment. * 2) `recover`: When executed, the vault turns in the receipts and retrieves the underlying asset and * usually collects some yield for this work. * * The rules of the deployment and recovery are specific to the vault strategy. * * At any time the vault will hold multiple ERC20 tokens, together referred to as the vault's "assets". * They can be a combination of the underlying asset and the deployed assets (receipts). * * On redemption users burn their "notes" to receive a proportional slice of all the vault's assets. * */ interface IVault is IERC20Upgradeable { /// @notice Recovers deployed funds and redeploys them. function recoverAndRedeploy() external; /// @notice Deploys deposited funds. function deploy() external; /// @notice Recovers deployed funds. function recover() external; /// @notice Recovers a given deployed asset. /// @param token The ERC-20 token address of the deployed asset. function recover(IERC20Upgradeable token) external; /// @notice Deposits the underlying asset from {msg.sender} into the vault and mints notes. /// @param amount The amount tokens to be deposited into the vault. /// @return The amount of notes. function deposit(uint256 amount) external returns (uint256); /// @notice Burns notes and sends a proportional share of vault's assets back to {msg.sender}. /// @param notes The amount of notes to be burnt. /// @return The list of asset tokens and amounts redeemed. function redeem(uint256 notes) external returns (TokenAmount[] memory); /// @notice Batches the recover and redeem functions. /// @param notes The amount of notes to be burnt. /// @return The list of asset tokens and amounts redeemed. function recoverAndRedeem(uint256 notes) external returns (TokenAmount[] memory); /// @return The total value of assets currently held by the vault, denominated in a standard unit of account. function getTVL() external view returns (uint256); /// @param token The address of the asset ERC-20 token held by the vault. /// @return The vault's asset token value, denominated in a standard unit of account. function getVaultAssetValue(IERC20Upgradeable token) external view returns (uint256); /// @notice The ERC20 token that can be deposited into this vault. function underlying() external view returns (IERC20Upgradeable); /// @return Total count of ERC-20 tokens held by the vault. function assetCount() external view returns (uint256); /// @param i The index of a token. /// @return The vault's asset token address by index. function assetAt(uint256 i) external view returns (IERC20Upgradeable); /// @param token The address of the asset ERC-20 token held by the vault. /// @return The vault's asset token balance. function vaultAssetBalance(IERC20Upgradeable token) external view returns (uint256); /// @param token The address of a token to check. /// @return If the given token is held by the vault. function isVaultAsset(IERC20Upgradeable token) external view returns (bool); /// @notice Computes the amount of notes minted when given amount of underlying asset tokens /// are deposited into the system. /// @param amount The amount tokens to be deposited into the vault. /// @return The amount of notes to be minted. function computeMintAmt(uint256 amount) external returns (uint256); /// @notice Computes the amount of asset tokens redeemed when burning given number of vault notes. /// @param notes The amount of notes to be burnt. /// @return The list of asset tokens and amounts redeemed. function computeRedemptionAmts(uint256 notes) external returns (TokenAmount[] memory); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.20; //------------------------------------------------------------------------- // Generic /// @notice Expected contract call to be triggered by authorized caller. error UnauthorizedCall(); /// @notice Expected transfer out asset to not be a reserve asset. error UnauthorizedTransferOut(); /// @notice Expected contract reference to not be `address(0)`. error UnacceptableReference(); /// @notice Expected interface contract to return a fixed point with a different number of decimals. error UnexpectedDecimals(); /// @notice Expected asset to be a valid reserve/vault asset. error UnexpectedAsset(); /// @notice Expected to mint a non-zero amount of notes. error UnacceptableDeposit(); /// @notice Expected to redeem a non-zero amount of notes. error UnacceptableRedemption(); /// @notice Updated parameters violate defined constraints. error UnacceptableParams(); /// @notice Storage array access out of bounds. error OutOfBounds(); /// @notice Expected the number of reserve assets to be under the limit. error ReserveCountOverLimit(); //------------------------------------------------------------------------- // Perp /// @notice Expected rollover to be acceptable. error UnacceptableRollover(); /// @notice Expected supply to be lower than the defined max supply. error ExceededMaxSupply(); /// @notice Expected the total mint amount per tranche to be lower than the limit. error ExceededMaxMintPerTranche(); //------------------------------------------------------------------------- // Vault /// @notice Expected more underlying token liquidity to perform operation. error InsufficientLiquidity(); /// @notice Expected to swap non-zero assets. error UnacceptableSwap(); /// @notice Expected more assets to be deployed. error InsufficientDeployment(); /// @notice Expected the number of vault assets deployed to be under the limit. error DeployedCountOverLimit(); /// @notice Expected parent bond to have only 2 children tranches. error UnacceptableTrancheLength(); //------------------------------------------------------------------------- // Fee Policy /// @notice Expected perc value to be at most (1 * 10**DECIMALS), i.e) 1.0 or 100%. error InvalidPerc(); /// @notice Expected target subscription ratio to be within defined bounds. error InvalidTargetSRBounds(); /// @notice Expected deviation ratio bounds to be valid. error InvalidDRBounds(); /// @notice Expected sigmoid asymptotes to be within defined bounds. error InvalidSigmoidAsymptotes();
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.20; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; import { IBondController } from "../_interfaces/buttonwood/IBondController.sol"; import { ITranche } from "../_interfaces/buttonwood/ITranche.sol"; import { TokenAmount } from "../_interfaces/CommonTypes.sol"; import { UnacceptableDeposit, UnacceptableTrancheLength } from "../_interfaces/ProtocolErrors.sol"; import { SafeCastUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/SafeCastUpgradeable.sol"; import { MathUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; import { BondTranches } from "./BondTranchesHelpers.sol"; /** * @title BondHelpers * * @notice Library with helper functions for ButtonWood's Bond contract. * */ library BondHelpers { using SafeCastUpgradeable for uint256; using MathUpgradeable for uint256; // Replicating value used here: // https://github.com/buttonwood-protocol/tranche/blob/main/contracts/BondController.sol uint256 private constant TRANCHE_RATIO_GRANULARITY = 1000; /// @notice Given a bond, calculates the time remaining to maturity. /// @param b The address of the bond contract. /// @return The number of seconds before the bond reaches maturity. function secondsToMaturity(IBondController b) internal view returns (uint256) { uint256 maturityDate = b.maturityDate(); return maturityDate > block.timestamp ? maturityDate - block.timestamp : 0; } /// @notice Given a bond, retrieves all of the bond's tranches. /// @param b The address of the bond contract. /// @return bt The bond's tranche data. function getTranches(IBondController b) internal view returns (BondTranches memory bt) { if (b.trancheCount() != 2) { revert UnacceptableTrancheLength(); } (bt.tranches[0], bt.trancheRatios[0]) = b.tranches(0); (bt.tranches[1], bt.trancheRatios[1]) = b.tranches(1); } /// @notice Given a bond, returns the tranche at the specified index. /// @param b The address of the bond contract. /// @param i Index of the tranche. /// @return t The tranche address. function trancheAt(IBondController b, uint8 i) internal view returns (ITranche t) { (t, ) = b.tranches(i); } /// @notice Given a bond, returns the address of the most senior tranche. /// @param b The address of the bond contract. /// @return t The senior tranche address. function getSeniorTranche(IBondController b) internal view returns (ITranche t) { (t, ) = b.tranches(0); } /// @notice Given a bond, returns the tranche ratio of the most senior tranche. /// @param b The address of the bond contract. /// @return r The tranche ratio of the senior most tranche. function getSeniorTrancheRatio(IBondController b) internal view returns (uint256 r) { (, r) = b.tranches(0); } /// @notice Helper function to estimate the amount of tranches minted when a given amount of collateral /// is deposited into the bond. /// @dev This function is used off-chain services (using callStatic) to preview tranches minted. /// This function assumes that the no fees are withheld for tranching. /// @param b The address of the bond contract. /// @return The tranche data, an array of tranche amounts. function previewDeposit(IBondController b, uint256 collateralAmount) internal view returns (TokenAmount[] memory) { if (b.isMature()) { revert UnacceptableDeposit(); } BondTranches memory bt = getTranches(b); TokenAmount[] memory tranchesOut = new TokenAmount[](2); uint256 totalDebt = b.totalDebt(); uint256 collateralBalance = IERC20Upgradeable(b.collateralToken()).balanceOf(address(b)); uint256 seniorAmt = collateralAmount.mulDiv(bt.trancheRatios[0], TRANCHE_RATIO_GRANULARITY); if (collateralBalance > 0) { seniorAmt = seniorAmt.mulDiv(totalDebt, collateralBalance); } tranchesOut[0] = TokenAmount({ token: bt.tranches[0], amount: seniorAmt }); uint256 juniorAmt = collateralAmount.mulDiv(bt.trancheRatios[1], TRANCHE_RATIO_GRANULARITY); if (collateralBalance > 0) { juniorAmt = juniorAmt.mulDiv(totalDebt, collateralBalance); } tranchesOut[1] = TokenAmount({ token: bt.tranches[1], amount: juniorAmt }); return tranchesOut; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.20; import { ITranche } from "../_interfaces/buttonwood/ITranche.sol"; import { MathUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; // @dev We assume that all bonds in the system just have 2 tranches, i.e) one senior and one junior. struct BondTranches { ITranche[2] tranches; uint256[2] trancheRatios; } /** * @title BondTranchesHelpers * * @notice Library with helper functions for the bond's retrieved tranche data. * */ library BondTranchesHelpers { using MathUpgradeable for uint256; /// @notice For a given bond's tranche data and user address, computes the maximum number of each of the bond's tranches /// the user is able to redeem before the bond's maturity. These tranche amounts necessarily match the bond's tranche ratios. /// @param bt The bond's tranche data. /// @param u The address to check balance for. /// @return An array of tranche token balances. function computeRedeemableTrancheAmounts( BondTranches memory bt, address u ) internal view returns (uint256[] memory) { uint256[] memory trancheBalsAvailable = new uint256[](2); trancheBalsAvailable[0] = bt.tranches[0].balanceOf(u); trancheBalsAvailable[1] = bt.tranches[1].balanceOf(u); return computeRedeemableTrancheAmounts(bt, trancheBalsAvailable); } /// @notice For a given bond's tranche data and tranche balances available, computes the maximum number of each of the bond's tranches /// the user is able to redeem before the bond's maturity. /// The returned tranche amounts necessarily match the bond's tranche ratios. /// @param bt The bond's tranche data. /// @param trancheBalsAvailable The tranche balance of each bond tranche available to be used for redemption. /// @return An array of tranche token balances. function computeRedeemableTrancheAmounts( BondTranches memory bt, uint256[] memory trancheBalsAvailable ) internal pure returns (uint256[] memory) { uint256[] memory trancheAmtsReq = new uint256[](2); // We compute the amount of seniors required using all the juniors trancheAmtsReq[1] = trancheBalsAvailable[1] - (trancheBalsAvailable[1] % bt.trancheRatios[1]); trancheAmtsReq[0] = (trancheAmtsReq[1] * bt.trancheRatios[0]) / bt.trancheRatios[1]; // If enough seniors aren't available, we compute the amount of juniors required using all the seniors if (trancheAmtsReq[0] > trancheBalsAvailable[0]) { trancheAmtsReq[0] = trancheBalsAvailable[0] - (trancheBalsAvailable[0] % bt.trancheRatios[0]); trancheAmtsReq[1] = (trancheAmtsReq[0] * bt.trancheRatios[1]) / bt.trancheRatios[0]; } return trancheAmtsReq; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.20; import { IBondController } from "../_interfaces/buttonwood/IBondController.sol"; import { MathUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; import { BondHelpers } from "./BondHelpers.sol"; /** * @title PerpHelpers * * @notice Library with helper functions for the Perpetual tranche contract. * */ library PerpHelpers { using MathUpgradeable for uint256; using BondHelpers for IBondController; // Replicating value used here: // https://github.com/buttonwood-protocol/tranche/blob/main/contracts/BondController.sol uint256 private constant TRANCHE_RATIO_GRANULARITY = 1000; /// @dev Input data required to estimate the amount of underlying required to mint perps. struct MintEstimationParams { /// @notice perpTVL The current TVL of perp. uint256 perpTVL; /// @notice perpSupply The total supply of perp tokens. uint256 perpSupply; /// @notice depositBondCollateralBalance The total collateral balance of perp's deposit bond. uint256 depositBondCollateralBalance; /// @notice depositBondTotalDebt The total debt of perp's deposit bond. uint256 depositBondTotalDebt; /// @notice depositTrancheSupply The total supply of perp's deposit tranche. uint256 depositTrancheSupply; /// @notice depositTrancheTR The tranche ratio of perp's deposit tranche. uint256 depositTrancheTR; } /// @notice This function estimates the amount of underlying tokens that need to be tranched /// in order to mint the given amount of perp tokens. /// @dev If this function errs, it is guaranteed to err by overestimating, i.e) when you tranche the estimated amount /// of underlying tokens, then and use the senior tranches to mint perps, /// you might end up minting slightly more than `perpAmtToMint`. /// @param p The estimation input parameters. /// @param perpAmtToMint The required number of perp tokens to mint. /// @return underylingAmtToTranche The number of underlying tokens to tranche. /// @return seniorAmtToDeposit The number of minted seniors to then deposit into perp. function estimateUnderlyingAmtToTranche( MintEstimationParams memory p, uint256 perpAmtToMint ) internal pure returns (uint256, uint256) { // We assume that: // - Perp's deposit tranche is the most senior tranche in the deposit bond. // - The deposit bond is NOT mature. // - No fees are withheld while tranching // Math explanation: // // Given [Y] underlying tokens, // We can create S seniors, // S = Y * seniorRatio / bondCDR // = Y * (depositTrancheTR/TRANCHE_RATIO_GRANULARITY) / (depositBondCollateralBalance/depositBondTotalDebt) // = (Y * depositTrancheTR * depositBondTotalDebt) / (TRANCHE_RATIO_GRANULARITY * depositBondCollateralBalance) // // Given [S] senior tranche tokens, // We can mint X perps, // X = S * price(senior) / price(perp) // X = S * (seniorClaim / seniorSupply) / (perpTVL / perpSupply) // X = (S * seniorClaim * perpSupply) / (seniorSupply * perpTVL) // // Thus given X (perpAmtToMint), we calculate S (seniorAmtToDeposit) and Y (underlyingAmtToTranche) // // S = (X * perpTVL * seniorSupply) / (perpSupply * seniorClaim) // = X * (perpTVL / perpSupply) * (seniorSupply / seniorClaim) // // Y = (S * depositBondCollateralBalance * TRANCHE_RATIO_GRANULARITY) / (depositBondTotalDebt * depositTrancheTR) // = S * (depositBondCollateralBalance / depositBondTotalDebt) * (TRANCHE_RATIO_GRANULARITY / depositTrancheTR) // uint256 seniorAmtToDeposit = (p.perpSupply > 0) ? perpAmtToMint.mulDiv(p.perpTVL, p.perpSupply, MathUpgradeable.Rounding.Up) : perpAmtToMint; uint256 depositTrancheClaim = MathUpgradeable.min(p.depositTrancheSupply, p.depositBondCollateralBalance); seniorAmtToDeposit = (p.depositTrancheSupply > 0) ? seniorAmtToDeposit.mulDiv(p.depositTrancheSupply, depositTrancheClaim, MathUpgradeable.Rounding.Up) : seniorAmtToDeposit; uint256 underlyingAmtToTranche = (p.depositBondTotalDebt > 0) ? seniorAmtToDeposit.mulDiv( p.depositBondCollateralBalance, p.depositBondTotalDebt, MathUpgradeable.Rounding.Up ) : seniorAmtToDeposit; underlyingAmtToTranche = underlyingAmtToTranche.mulDiv( TRANCHE_RATIO_GRANULARITY, p.depositTrancheTR, MathUpgradeable.Rounding.Up ); return (underlyingAmtToTranche, seniorAmtToDeposit); } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.20; import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; import { IBondController } from "../_interfaces/buttonwood/IBondController.sol"; import { ITranche } from "../_interfaces/buttonwood/ITranche.sol"; import { UnacceptableTrancheLength } from "../_interfaces/ProtocolErrors.sol"; import { MathUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol"; import { BondHelpers } from "./BondHelpers.sol"; /** * @title TrancheHelpers * * @notice Library with helper functions for tranche tokens. * */ library TrancheHelpers { using BondHelpers for IBondController; /// @notice Given a tranche, calculates the claimable collateral balance backing the tranche supply. /// @param tranche Address of the tranche token. /// @param collateralToken Address of the tranche's underlying collateral token. /// @return The collateral balance and the tranche token supply. function getTrancheCollateralization( ITranche tranche, IERC20Upgradeable collateralToken ) internal view returns (uint256, uint256) { IBondController bond = IBondController(tranche.bond()); uint256 trancheSupply = tranche.totalSupply(); uint256 trancheClaim = 0; // When the tranche's parent bond is mature if (bond.isMature()) { trancheClaim = collateralToken.balanceOf(address(tranche)); return (trancheClaim, trancheSupply); } // NOTE: This implementation assumes the bond has only two tranches. if (bond.trancheCount() != 2) { revert UnacceptableTrancheLength(); } uint256 bondCollateralBalance = collateralToken.balanceOf(address(bond)); // For junior tranche if (bond.trancheAt(1) == tranche) { uint256 seniorSupply = bond.totalDebt() - trancheSupply; uint256 seniorClaim = MathUpgradeable.min(seniorSupply, bondCollateralBalance); trancheClaim = bondCollateralBalance - seniorClaim; } // For senior tranche else { // require(bond.trancheAt(0) == tranche); trancheClaim = MathUpgradeable.min(trancheSupply, bondCollateralBalance); } return (trancheClaim, trancheSupply); } }
{ "optimizer": { "enabled": true, "runs": 750 }, "evmVersion": "paris", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IERC20Upgradeable","name":"token","type":"address"}],"name":"vaultAssetBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.