fluid-contracts-public/contracts/oracle/interfaces/external/IRedstoneOracle.sol

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// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;
interface IRedstoneOracle {
/// @notice Get the `exchangeRate_` between the underlying asset and the peg asset
// @dev custom Redstone adapter for Instadapp implementation
function getExchangeRate() external view returns (uint256 exchangeRate_);
/**
* @notice Returns the number of decimals for the price feed
* @dev By default, RedStone uses 8 decimals for data feeds
* @return decimals The number of decimals in the price feed values
*/
// see https://github.com/redstone-finance/redstone-oracles-monorepo/blob/main/packages/on-chain-relayer/contracts/price-feeds/PriceFeedBase.sol#L51C12-L51C20
function decimals() external view returns (uint8);
}