Ethereum Smart Contract Upgradeability Strategies Quiz

1. What ensures that Ethereum smart contracts maintain their original logic after being deployed?

• Immutability
• Flexibility
• Variability
• Adjustability

2. What is the method called that prevents changes in deployed smart contracts?

• Flexibility
• Accessibility
• Modularity
• Immutability

3. What challenge does the immutability of smart contracts present?

• Increased transaction speeds.
• The inability to fix vulnerabilities or bugs.
• Difficulty in writing proper code.
• Lower overall costs of deployment.

4. How would you define an upgrade to a smart contract?

• Changing the business logic of a smart contract while preserving its state.
• Deleting existing logic and state of a smart contract.
• Creating an entirely new smart contract without any prior state.
• Duplicating the contract code without modifying functionality.

5. What are common strategies for upgrading Ethereum smart contracts?

• Contract migration, data separation, and proxy pattern
• Storing new contracts in a single file
• Simple renaming of functions
• Compiling changes into the original contract

6. Can you explain the process of contract migration in smart contract upgrades?

• Modifying the existing smart contract`s code directly to improve functionality.
• Replacing the old contract with a completely blank new contract without transferring any data.
• Deploying a new instance of an existing smart contract and transferring storage and balances to the new contract.
• Creating a temporary contract to handle transactions while upgrading the main contract.

7. In what way does data separation facilitate smart contract upgrades?

• By merging the logic and data into a single contract for efficiency.
• By placing all components into a single contract to simplify the structure.
• By separating business logic and data storage into different contracts, allowing for changes in logic without affecting data.
• By ensuring that all contracts are immutable and cannot be changed.

8. What does the proxy pattern accomplish in smart contract upgradeability?

• Creating static smart contracts that cannot change.
• Using an immutable proxy to point to changeable logic.
• Encrypting the smart contract to secure the code.
• Only allowing public visibility onto the smart contract.

9. What role does the strategy pattern play in upgrading smart contracts?

• By allowing a main contract to interface with and switch between different implementations of satellite contracts.
• By ensuring that all transactions are processed in a single block to reduce costs.
• By enforcing a strict validation of all inputs before any contract execution.
• By making all contract functions automatically executable without user input.

10. How does the diamond pattern enhance the upgrade process for smart contracts?

• It simplifies the structure by using one main contract.
• It merges all functions into a single contract for clarity.
• It allows for delegating function calls from a proxy to multiple logic contracts.
• It restricts contract functionality to a single logic contract.

11. What advantages do upgradeable smart contracts offer to developers?

• They require no external audits after deployment.
• They increase transaction speeds significantly compared to traditional contracts.
• They eliminate all security vulnerabilities present in the original contracts.
• They allow for bug fixes, new features, and improvements without compromising decentralization and security.

12. How can the use of proxy patterns help manage immutable contract logic?

• By allowing state modifications through function delegation.
• By increasing gas costs for every transaction.
• By making all contract functions immutable forever.
• By ensuring all contracts must be rewritten entirely.

13. What is the function of the main contract within the strategy pattern of upgrades?

• It eliminates the need for any satellite contracts.
• It allows the main contract to manage different logic implementations.
• It restricts the main contract to a single implementation.
• It forces the main contract to modify its state upon each change.

14. How does the main contract manage changes to satellite contract implementations?

• By requiring user approval for each change to the satellite contracts.
• By modifying the core business logic of the main contract directly.
• By updating the address of the satellite contract in the main contract configuration.
• By deploying a completely new main contract for every change.

15. Why is the diamond pattern beneficial for more extensive contract upgrades?

• It simplifies the code structure of a single contract.
• It allows for delegating function calls to multiple logic contracts.
• It limits the number of functions in a smart contract.
• It enforces stricter security measures for all contracts.

16. What steps are necessary for successfully migrating a smart contract?

• Writing the original contract code from scratch again.
• Ignoring any changes to interacting contracts or user balances.
• Deploying a new contract, transferring storage and balances, updating interacting contracts, and convincing users to switch.
• Copying and pasting the old contract into a new one without changes.

17. What difficulties arise during the user storage migration phase?

• It simplifies the contract structure and logic.
• It automatically updates all user interfaces and balances.
• It improves transaction speeds and reduces fees.
• It is time-intensive and can incur high gas costs.

18. How does data separation affect the operation of smart contracts?

• It eliminates gas fees associated with contract interactions by centralizing all processes.
• By separating business logic and data storage into different contracts, allowing for changes in logic without affecting data.
• It makes smart contracts faster by reducing the complexity of code execution.
• It ensures all data is stored within the same contract for easier access and modifications.

19. What effects does the proxy pattern have on smooth contract upgrades?

• It allows for seamless upgrades by delegating function calls from an immutable proxy to a modifiable logic contract.
• It permanently locks the contract code, preventing all future changes.
• It makes upgrades impossible, leading to outdated contracts.
• It requires complete redeployment of the entire smart contract every time.

20. What limits does the strategy pattern impose on contract changes?

• By allowing unlimited alterations to both main and satellite contracts.
• By preventing all changes to the main contract entirely.
• By keeping the main contract`s business logic intact and only updating the satellite contracts.
• By permitting changes without any constraints on the contract structure.

21. In what way does EIP-1559 impact smart contract operations?

• It restricts the number of smart contracts that can be deployed on Ethereum.
• It mandates the use of a fixed gas fee for all transactions, removing flexibility.
• It introduces a complex transaction fee mechanism, providing predictability in gas fees and improving transaction efficiency.
• It eliminates the need for gas fees entirely, making transactions free.

22. How can gas costs be minimized during smart contract transactions?

• By using older versions of Ethereum.
• By restricting contract interactions to a single user.
• By writing longer smart contract code.
• By setting an indicator of priority level for transactions.

23. What role does deployment tooling play in smart contract deployment?

• It ensures that smart contracts are immutable and secure.
• It manages user interactions with deployed smart contracts directly.
• It helps in deploying smart contracts by providing necessary configurations and settings.
• It is responsible for auditing and verifying the smart contract code.

24. What essentials are required to deploy a smart contract on Ethereum?

• BTC for transactions, contract storage, execution script, private node
• ETH for gas, contract bytecode, deployment script, public node
• Bitcoin for fees, contract address, testing script, local node
• USD for charges, metadata hash, inspection script, virtual node

25. In what way do verification and testing of smart contracts differ?

• Verification validates transactions whereas testing checks gas limits.
• Verification focuses on user feedback while testing measures execution time.
• Verification involves comparing recompiled bytecode with deployed bytecode, while testing involves analyzing the source code quality.
• Verification tests user interaction while testing checks deployment speed.

26. Why is transparency essential for trust in Ethereum smart contracts?

• Transparency complicates the understanding of how contracts work, leading to mistrust.
• Transparency prevents any updates to the contract, ensuring it remains unchangeable.
• Transparency exposes private keys, risking security and trust in the system.
• Transparency helps establish trust by making the execution of smart contracts open and visible.

27. What techniques are typically employed to test smart contracts effectively?

• Performance benchmarking and profiling.
• Automated and manual testing.
• Continuous integration and delivery.
• Stakeholder interviews and surveys.

28. How can developers secure smart contracts during the upgrading process?

• By implementing manual checks without any tools.
• By using proxy patterns and ensuring that only authorized changes are made to the logic contract.
• By allowing any developer to modify the contract code at any time.
• By avoiding updates until the code becomes outdated.

29. What benefits do smart contract libraries provide to developers?

• It provides reusable code, ensures security through open-source scrutiny, and enhances interoperability and composability.
• It limits developers to only one programming language for coding.
• It guarantees that all contracts will be free of bugs and vulnerabilities.
• It automatically audits every contract for security issues.

30. How does the diamond pattern solve the issue of contract size limitations?

• It reduces the complexity of contract interactions by using a single logic contract.
• It eliminates the need for external dependencies in smart contract design.
• It simplifies the code structure by merging all logic into one contract.
• It allows for larger smart contracts by enabling multiple logic contracts to be used.