January 2026 Vault Upgrade

Vault contract upgrades are deployed to improve security, efficiency, and functionality. Each upgrade undergoes thorough auditing and governance approval before deployment.

Scheduled: January 19, 2026

Upgrade In
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Local: January 19, 2026 at 3:00 PM

UTC: January 19, 2026 at 3:00 PM

Summary

Adds getImplementation() function to retrieve the proxy implementation address, improving transparency for vault contract upgrades and verification.

baseImplementationethereumImplementation

Code Changes

contracts/YoVault_V2.sol
+17
@@ -33,6 +33,14 @@
3333 using Address for address;
3434 using SafeERC20 for IERC20;
3535
36+ /// @dev A slot for storing an address value.
37+ struct AddressSlot {
38+ address value;
39+ }
40+
41+ /// @dev The slot for the implementation contract.
42+ bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
43+
3644 /// @dev Assume requests are non-fungible and all have ID = 0, so we can differentiate between a request ID and the
3745 /// assets amount.
3846 uint256 internal constant REQUEST_ID = 0;
@@ -288,6 +296,15 @@
288296 return shares.mulDiv(pricePerShare, 10 ** decimals(), rounding);
289297 }
290298
299+ /// @notice Get the implementation contract address of a proxy.
300+ function getImplementation() external view returns (address) {
301+ AddressSlot storage r;
302+ assembly ("memory-safe") {
303+ r.slot := _IMPLEMENTATION_SLOT
304+ }
305+ return r.value;
306+ }
307+
291308 /// @dev Preview taking an entry fee on deposit. See {IERC4626-previewDeposit}.
292309 function previewDeposit(uint256 assets) public view virtual override returns (uint256) {
293310 uint256 fee = _feeOnTotal(assets, feeOnDeposit);