stETH Token Smart Contract Audit

Project Background

  • This contract seems to be a part of the Aragon framework, specifically handling proxy contracts for upgradeable apps. Here’s a breakdown of its functionality:
    • Unstructured Storage Library: This library provides functions to interact with unstructured storage. It allows storing and retrieving data at arbitrary storage slots.
    • Interface Definitions:
      • IACL: An interface defining the Access Control List for permissions management.
      • IVaultRecoverable: An interface for contracts that support recovery of tokens to a vault.
    • AppStorage Contract: This contract defines storage slots for storing the kernel address and app ID.
    • IsContract Contract: This contract provides a function isContract to check if an address corresponds to a contract.
    • ERCProxy Contract: This contract defines an interface for proxy contracts, specifying functions to get the proxy type and implementation address.
    • DelegateProxy Contract: This contract extends ERCProxy and provides a function delegatedFwd to perform delegate calls.
    • DepositableStorage Contract: This contract defines a storage slot to indicate whether a contract accepts deposits.
    • DepositableDelegateProxy Contract: This contract combines the functionality of DepositableStorage and DelegateProxy, allowing for delegate calls and handling of deposits.
    • KernelConstants Contract: This contract defines constants related to the Aragon kernel, such as the app IDs for the core kernel, default ACL, and default vault.
    • KernelNamespaceConstants Contract: This contract defines constants related to kernel namespaces.
    • AppProxyBase Contract: This contract is the base contract for Aragon app proxies. It sets up the proxy with a kernel reference, app ID, and optional initialization payload.
    • AppProxyUpgradeable Contract: This contract extends AppProxyBase and implements the ERC897 standard for upgradeable proxies. It defines functions to get the implementation address and proxy type.
  • Overall, these contracts provide a framework for creating upgradeable proxies for Aragon apps, allowing for efficient storage management and upgradeability.

Website: lido.fi

Executive Audit Summary

  • According to the standard audit assessment, the Customer`s solidity smart contracts are “Secured”. This token contract does not have any ownership control, hence it is 100% decentralized.  
  • We used various tools like Slither, Solhint and Remix IDE. At the same time this finding is based on critical analysis of the manual audit.
  • We found 0 critical, 0 high, 0 medium,  0 low and 4 very low-level issues.

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