TransientReentrancyGuard (V2)

Source reference for public revision e3b9d12. For deployed configuration, select the pool's engine on the parameter page.

Git Source

Authors: Axicon Labs Limited, Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/TransientReentrancyGuard.sol), Modified from Soledge (https://github.com/Vectorized/soledge/blob/main/src/utils/ReentrancyGuard.sol)

Gas optimized reentrancy protection for smart contracts. Leverages Cancun transient storage.

State Variables

REENTRANCY_GUARD_SLOT

uint256 private constant REENTRANCY_GUARD_SLOT = 0x8053dfe21e206073e7d912b6bcd2323894159cfd58d0a607082c42be308afb86

Functions

nonReentrant

Prevents reentrant calls by setting and resetting the reentrancy guard

Sets the guard before function execution and resets it after. Reverts if already entered

modifier nonReentrant() virtual;

ensureNonReentrantView

Guards view functions against read-only reentrancy.

If the reentrancy lock is currently active (meaning we are inside a state-changing function), this modifier will revert. This ensures external callers cannot read inconsistent state.

modifier ensureNonReentrantView() virtual;

_ensureNonReentrantView

Guards view functions against read-only reentrancy

If the reentrancy lock is currently active (meaning we are inside a state-changing function), this modifier will revert. This ensures external callers cannot read inconsistent state

function _ensureNonReentrantView() internal view;

_nonReentrantSet

Sets the reentrancy guard using transient storage

Checks if the guard is already set and reverts if so. Stores a non-zero value (address()) in the guard slot

function _nonReentrantSet() internal;

_nonReentrantReset

Resets the reentrancy guard to zero in transient storage

Must be called to clear the guard as transient storage persists until the end of the transaction, not just the call frame

function _nonReentrantReset() internal;

reentrancyGuardEntered

Returns whether the reentrancy guard is currently entered (a protected function is executing).

function reentrancyGuardEntered() public view returns (bool entered);

Returns

Name	Type	Description
entered	bool	True if the reentrancy guard is active, false otherwise