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Security

UUPS Proxies

In order to be able to improve and secure the protocol, the following smart-contracts use UUPS Proxy pattern to make them upgradeable:
  • AccessManager
  • FeesManager
  • KYCToken
The UUPS proxy pattern was first documented in EIP-1822. Unlike Transparent pattern, in UUPS the upgrade logic is handled by the implementation contract itself. The UUPS implementation used by Shprd smart-contracts is the OpenZeppelin UUPSUpgradeable interface.
Proxies - OpenZeppelin Docs
OpenZeppelin UUPSUpgradeable interface

Beacon Proxy

Vault smart-contracts use Beacon proxy pattern to be able to change the logic of all the vaults created at once. The beacon proxy pattern was first documented in EIP-1967. The Beacon implementation used by Shprd smart-contracts is the OpenZeppelin UpgradeableBeacon interface.
Proxies - OpenZeppelin Docs
OpenZeppelin UpgradeableBeacon interface