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SizeView.sol
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SizeView.sol
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;
import {SizeStorage, State, User} from "@src/SizeStorage.sol";
import {VariablePoolBorrowRateParams} from "@src/libraries/YieldCurveLibrary.sol";
import {
CREDIT_POSITION_ID_START,
CreditPosition,
DEBT_POSITION_ID_START,
DebtPosition,
LoanLibrary,
LoanStatus,
RESERVED_ID
} from "@src/libraries/LoanLibrary.sol";
import {UpdateConfig} from "@src/libraries/actions/UpdateConfig.sol";
import {AccountingLibrary} from "@src/libraries/AccountingLibrary.sol";
import {RiskLibrary} from "@src/libraries/RiskLibrary.sol";
import {DataView, UserView} from "@src/SizeViewData.sol";
import {ISizeView} from "@src/interfaces/ISizeView.sol";
import {Errors} from "@src/libraries/Errors.sol";
import {BorrowOffer, LoanOffer, OfferLibrary} from "@src/libraries/OfferLibrary.sol";
import {
InitializeDataParams,
InitializeFeeConfigParams,
InitializeOracleParams,
InitializeRiskConfigParams
} from "@src/libraries/actions/Initialize.sol";
/// @title SizeView
/// @custom:security-contact security@size.credit
/// @author Size (https://size.credit/)
/// @notice View methods for the Size protocol
abstract contract SizeView is SizeStorage, ISizeView {
using OfferLibrary for LoanOffer;
using OfferLibrary for BorrowOffer;
using LoanLibrary for DebtPosition;
using LoanLibrary for CreditPosition;
using LoanLibrary for State;
using RiskLibrary for State;
using AccountingLibrary for State;
using UpdateConfig for State;
/// @inheritdoc ISizeView
function collateralRatio(address user) external view returns (uint256) {
return state.collateralRatio(user);
}
/// @inheritdoc ISizeView
function isUserUnderwater(address user) external view returns (bool) {
return state.isUserUnderwater(user);
}
/// @inheritdoc ISizeView
function isDebtPositionLiquidatable(uint256 debtPositionId) external view returns (bool) {
return state.isDebtPositionLiquidatable(debtPositionId);
}
/// @inheritdoc ISizeView
function debtTokenAmountToCollateralTokenAmount(uint256 borrowATokenAmount) external view returns (uint256) {
return state.debtTokenAmountToCollateralTokenAmount(borrowATokenAmount);
}
/// @inheritdoc ISizeView
function feeConfig() external view returns (InitializeFeeConfigParams memory) {
return state.feeConfigParams();
}
/// @inheritdoc ISizeView
function riskConfig() external view returns (InitializeRiskConfigParams memory) {
return state.riskConfigParams();
}
/// @inheritdoc ISizeView
function oracle() external view returns (InitializeOracleParams memory) {
return state.oracleParams();
}
/// @inheritdoc ISizeView
function data() external view returns (DataView memory) {
return DataView({
nextDebtPositionId: state.data.nextDebtPositionId,
nextCreditPositionId: state.data.nextCreditPositionId,
underlyingCollateralToken: state.data.underlyingCollateralToken,
underlyingBorrowToken: state.data.underlyingBorrowToken,
variablePool: state.data.variablePool,
collateralToken: state.data.collateralToken,
borrowAToken: state.data.borrowAToken,
debtToken: state.data.debtToken
});
}
/// @inheritdoc ISizeView
function getUserView(address user) external view returns (UserView memory) {
return UserView({
user: state.data.users[user],
account: user,
collateralTokenBalance: state.data.collateralToken.balanceOf(user),
borrowATokenBalance: state.data.borrowAToken.balanceOf(user),
debtBalance: state.data.debtToken.balanceOf(user)
});
}
/// @inheritdoc ISizeView
function isDebtPositionId(uint256 debtPositionId) external view returns (bool) {
return state.isDebtPositionId(debtPositionId);
}
/// @inheritdoc ISizeView
function isCreditPositionId(uint256 creditPositionId) external view returns (bool) {
return state.isCreditPositionId(creditPositionId);
}
/// @inheritdoc ISizeView
function getDebtPosition(uint256 debtPositionId) external view returns (DebtPosition memory) {
return state.getDebtPosition(debtPositionId);
}
/// @inheritdoc ISizeView
function getCreditPosition(uint256 creditPositionId) external view returns (CreditPosition memory) {
return state.getCreditPosition(creditPositionId);
}
/// @inheritdoc ISizeView
function getLoanStatus(uint256 positionId) external view returns (LoanStatus) {
return state.getLoanStatus(positionId);
}
/// @inheritdoc ISizeView
function getPositionsCount() external view returns (uint256, uint256) {
return (
state.data.nextDebtPositionId - DEBT_POSITION_ID_START,
state.data.nextCreditPositionId - CREDIT_POSITION_ID_START
);
}
/// @inheritdoc ISizeView
function getBorrowOfferAPR(address borrower, uint256 tenor) external view returns (uint256) {
BorrowOffer memory offer = state.data.users[borrower].borrowOffer;
if (offer.isNull()) {
revert Errors.NULL_OFFER();
}
return offer.getAPRByTenor(
VariablePoolBorrowRateParams({
variablePoolBorrowRate: state.oracle.variablePoolBorrowRate,
variablePoolBorrowRateUpdatedAt: state.oracle.variablePoolBorrowRateUpdatedAt,
variablePoolBorrowRateStaleRateInterval: state.oracle.variablePoolBorrowRateStaleRateInterval
}),
tenor
);
}
/// @inheritdoc ISizeView
function getLoanOfferAPR(address lender, uint256 tenor) external view returns (uint256) {
LoanOffer memory offer = state.data.users[lender].loanOffer;
if (offer.isNull()) {
revert Errors.NULL_OFFER();
}
return offer.getAPRByTenor(
VariablePoolBorrowRateParams({
variablePoolBorrowRate: state.oracle.variablePoolBorrowRate,
variablePoolBorrowRateUpdatedAt: state.oracle.variablePoolBorrowRateUpdatedAt,
variablePoolBorrowRateStaleRateInterval: state.oracle.variablePoolBorrowRateStaleRateInterval
}),
tenor
);
}
/// @inheritdoc ISizeView
function getDebtPositionAssignedCollateral(uint256 debtPositionId) external view returns (uint256) {
DebtPosition memory debtPosition = state.getDebtPosition(debtPositionId);
return state.getDebtPositionAssignedCollateral(debtPosition);
}
/// @inheritdoc ISizeView
function getSwapFee(uint256 cash, uint256 tenor) public view returns (uint256) {
if (tenor == 0) {
revert Errors.NULL_TENOR();
}
return state.getSwapFee(cash, tenor);
}
}