What is the correct way to turn off upgradeability in a UUPSUpgradeable V5 contract?

[mrsalitre]

also thought about this, but the final goal its to not display the ‘upgradeToAndCall’ function at all, and to modify the ‘_authorizeUpgrade’ in that way will probably cause an update error.

UUPS Proxies: Tutorial (Solidity + JavaScript)

Regarding killing the upgradeability: Can I kill it with only one upgrade by implementing an impossible check in the _authorizeUpgrade method? For example if I upgrade to a new implementation which contains this function: function _authorizeUpgrade(address) internal override { require(false, "no more upgrades allowed"); } Or does the upgrade then fail, because of the security checks in the function _upgradeToAndCallSecure and I should just override the UUPS functions to directly call t…