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22 lines
906 B
Solidity
22 lines
906 B
Solidity
// SPDX-License-Identifier: BUSL-1.1
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pragma solidity 0.8.21;
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/// @title Oracle utils library
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/// @notice implements common utility methods for Fluid Oracles
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library OracleUtils {
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/// @dev The scaler for max delta point math (100%)
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uint256 internal constant HUNDRED_PERCENT_DELTA_SCALER = 10_000;
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/// @dev output precision of rates
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uint256 internal constant RATE_OUTPUT_DECIMALS = 27;
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/// @dev checks if `mainSourceRate_` is within a `maxDeltaPercent_` of `checkSourceRate_`. Returns true if so.
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function isRateOutsideDelta(
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uint256 mainSourceRate_,
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uint256 checkSourceRate_,
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uint256 maxDeltaPercent_
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) internal pure returns (bool) {
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uint256 offset_ = (checkSourceRate_ * maxDeltaPercent_) / HUNDRED_PERCENT_DELTA_SCALER;
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return (mainSourceRate_ > (checkSourceRate_ + offset_) || mainSourceRate_ < (checkSourceRate_ - offset_));
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}
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}
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