mirror of
https://github.com/Instadapp/fluid-contracts-public.git
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65 lines
3.2 KiB
Solidity
65 lines
3.2 KiB
Solidity
// SPDX-License-Identifier: BUSL-1.1
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pragma solidity 0.8.21;
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import { FluidOracle } from "../fluidOracle.sol";
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import { UniV3CheckCLRSOracle } from "./uniV3CheckCLRSOracle.sol";
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import { WeETHOracleImpl } from "../implementations/weETHOracleImpl.sol";
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import { IWeETH } from "../interfaces/external/IWeETH.sol";
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import { OracleUtils } from "../libraries/oracleUtils.sol";
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/// @title weETHOracle combined with a uniV3CheckCLRSOracle.
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/// @notice Gets the exchange rate between the underlying asset and the peg asset by using:
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/// 1. weETH Oracle price for weETH -> eETH = ETH (pegged)
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/// 2. result from 1. combined with a uniV3CheckCLRSOracle to get someToken (e.g. ETH) -> someToken2.
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/// e.g. when going from weETH to USDC:
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/// 1. weETH -> eETH = ETH via weETH Oracle
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/// 2. ETH -> USDC via UniV3 ETH <> USDC pool checked against ETH -> USDC Chainlink feed.
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contract WeETHUniV3CheckCLRSOracle is FluidOracle, WeETHOracleImpl, UniV3CheckCLRSOracle {
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/// @notice constructs a WeETHUniV3CheckCLRSOracle with all inherited contracts
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/// @param infoName_ Oracle identify helper name.
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/// @param weETH_ address of the weETH contract
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/// @param uniV3CheckCLRSParams_ UniV3CheckCLRSOracle constructor params
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constructor(
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string memory infoName_,
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IWeETH weETH_,
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UniV3CheckCLRSConstructorParams memory uniV3CheckCLRSParams_
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) WeETHOracleImpl(weETH_) UniV3CheckCLRSOracle(infoName_, uniV3CheckCLRSParams_) {}
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/// @inheritdoc FluidOracle
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function getExchangeRateOperate()
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public
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view
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override(FluidOracle, UniV3CheckCLRSOracle)
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returns (uint256 exchangeRate_)
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{
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// get rate from UniV3Check Oracle (likely uniV3 / Chainlink checked against for delta). This always returns
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// a price if some rate is valid, with multiple fallbacks. Can not return 0.
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// (super.getExchangeRate() returns UniV3CheckCLRSOracle rate, no other inherited contract has this.)
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// Combine this rate with the weETH -> eETH = ETH rate.
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exchangeRate_ =
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(super.getExchangeRateOperate() * _getWeETHExchangeRate()) /
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(10 ** OracleUtils.RATE_OUTPUT_DECIMALS);
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}
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/// @inheritdoc FluidOracle
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function getExchangeRateLiquidate()
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public
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view
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override(FluidOracle, UniV3CheckCLRSOracle)
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returns (uint256 exchangeRate_)
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{
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// get rate from UniV3Check Oracle (likely uniV3 / Chainlink checked against for delta). This always returns
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// a price if some rate is valid, with multiple fallbacks. Can not return 0.
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// (super.getExchangeRate() returns UniV3CheckCLRSOracle rate, no other inherited contract has this.)
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// Combine this rate with the weETH -> eETH = ETH rate.
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exchangeRate_ =
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(super.getExchangeRateLiquidate() * _getWeETHExchangeRate()) /
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(10 ** OracleUtils.RATE_OUTPUT_DECIMALS);
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}
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/// @inheritdoc FluidOracle
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function getExchangeRate() public view override(FluidOracle, UniV3CheckCLRSOracle) returns (uint256 exchangeRate_) {
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return getExchangeRateOperate();
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}
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}
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