January 2026 Vault Upgrade

January 19, 2026

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

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);