PriceValidationLibrary

Git Source

Title: PriceValidationLibrary

Author: Quantillon Labs - Nicolas Bellengé - @chewbaccoin

Library for price validation and deviation checks

Main characteristics:

• Price deviation checks to prevent flash loan attacks
• Block-based validation for price freshness
• Reduces code duplication across contracts

Note: security-contact: team@quantillon.money

Functions

checkPriceDeviation

Checks if price deviation exceeds maximum allowed

Only checks deviation if enough blocks have passed since last update

Notes:

• security: Prevents flash loan attacks by validating price deviations

• validation: Validates price changes are within acceptable bounds

• state-changes: No state changes - view function

• events: No events emitted

• errors: No errors thrown - returns boolean flag

• reentrancy: Not applicable - view function

• access: Internal library function - no access restrictions

• oracle: Uses provided price parameters (no direct oracle calls)

function checkPriceDeviation(
    uint256 currentPrice,
    uint256 lastValidPrice,
    uint256 maxDeviation,
    uint256 lastUpdateBlock,
    uint256 minBlocksBetweenUpdates
) internal view returns (bool shouldRevert, uint256 deviationBps);

Parameters

Returns