mirror of
https://github.com/Instadapp/fluid-contracts-public.git
synced 2024-07-29 21:57:37 +00:00
34 lines
1.6 KiB
Solidity
34 lines
1.6 KiB
Solidity
// SPDX-License-Identifier: BUSL-1.1
|
|
pragma solidity 0.8.21;
|
|
|
|
import { FluidOracle } from "../fluidOracle.sol";
|
|
import { ChainlinkOracleImpl } from "../implementations/chainlinkOracleImpl.sol";
|
|
import { UniV3OracleImpl } from "../implementations/uniV3OracleImpl.sol";
|
|
import { ErrorTypes } from "../errorTypes.sol";
|
|
|
|
/// @title Chainlink with Fallback to UniV3 Oracle
|
|
/// @notice Gets the exchange rate between the underlying asset and the peg asset by using:
|
|
/// the price from a Chainlink price feed or, if that feed fails, the price from a UniV3 TWAP delta checked Oracle.
|
|
contract CLFallbackUniV3Oracle is FluidOracle, ChainlinkOracleImpl, UniV3OracleImpl {
|
|
/// @notice sets the Chainlink and UniV3 Oracle configs.
|
|
/// @param chainlinkParams_ ChainlinkOracle constructor params struct.
|
|
/// @param uniV3Params_ UniV3Oracle constructor params struct.
|
|
constructor(
|
|
ChainlinkConstructorParams memory chainlinkParams_,
|
|
UniV3ConstructorParams memory uniV3Params_
|
|
) ChainlinkOracleImpl(chainlinkParams_) UniV3OracleImpl(uniV3Params_) {}
|
|
|
|
/// @inheritdoc FluidOracle
|
|
function getExchangeRate() external view override returns (uint256 exchangeRate_) {
|
|
exchangeRate_ = _getChainlinkExchangeRate();
|
|
if (exchangeRate_ == 0) {
|
|
// if Chainlink fails, use UniV3 rate (TWAP checked)
|
|
exchangeRate_ = _getUniV3ExchangeRate();
|
|
|
|
if (exchangeRate_ == 0) {
|
|
revert FluidOracleError(ErrorTypes.CLFallbackUniV3Oracle__ExchangeRateZero);
|
|
}
|
|
}
|
|
}
|
|
}
|