Files that changed from the base of the PR and between f943af3 and 716192e.

• CHANGELOG.md (1 hunks)
• app/app.go (1 hunks)
• precompiles/gov/IGov.sol (1 hunks)
• precompiles/gov/abi.json (1 hunks)
• precompiles/gov/errors.go (1 hunks)
• precompiles/gov/events.go (1 hunks)
• precompiles/gov/events_test.go (1 hunks)
• precompiles/gov/gov.go (1 hunks)
• precompiles/gov/gov_test.go (1 hunks)
• precompiles/gov/integration_test.go (1 hunks)
• precompiles/gov/setup_test.go (1 hunks)
• precompiles/gov/tx.go (1 hunks)
• precompiles/gov/tx_test.go (1 hunks)
• precompiles/gov/types.go (1 hunks)
• x/evm/keeper/static_precompiles.go (4 hunks)
• x/evm/types/params.go (1 hunks)
• x/evm/types/precompiles.go (2 hunks)

precompiles/gov/errors.go (1)

5-16: LGTM!

The error constants are well-defined, covering important scenarios related to governance operations. The error messages are clear, concise, and properly formatted using placeholders for dynamic values. Exporting these constants allows them to be used in other packages, promoting code reuse and maintainability.

x/evm/types/precompiles.go (2)

17-17: LGTM!

The addition of the GovPrecompileAddress constant is valid and follows the existing pattern for precompile addresses.

---

32-32: Verify the precompile implementation.

Adding the GovPrecompileAddress to the AvailableStaticPrecompiles slice is necessary and done correctly. However, please ensure that the corresponding precompile implementation is provided and functions as intended.

Run the following script to verify the precompile implementation:

Verification successful

---

Governance precompile implementation verified and approved.

The governance precompile is correctly implemented in precompiles/gov/gov.go. Key points:

• The Precompile struct implements the vm.PrecompiledContract interface.
• The Run method serves as the entry point for executing the precompile's functionality.
• The GovPrecompileAddress is properly set in the NewPrecompile function.
• Currently supports the VoteMethod, with more methods planned for future PRs.

The implementation follows the expected structure for a precompiled contract in the EVM, ensuring that the governance precompile will be recognized and accessible within the system as intended.

Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the governance precompile implementation.

# Test: Search for the precompile implementation. Expect: The implementation to be found.
rg --type go -A 10 $'func \(gp GovPrecompile\) Run'

Length of output: 52

---

Script:

#!/bin/bash
# Description: Search for governance precompile implementation

# Search for any mentions of "GovPrecompile"
echo "Searching for GovPrecompile mentions:"
rg --type go "GovPrecompile"

# Search for governance-related precompile implementations
echo -e "\nSearching for governance-related precompile implementations:"
rg --type go "func \(.*\) Run.*governance"

# Search for files that might contain the precompile implementation
echo -e "\nSearching for potential precompile implementation files:"
fd -e go "(gov|governance).*precompile"

Length of output: 783

---

Script:

#!/bin/bash
# Description: Examine the contents of precompiles/gov/gov.go

# Display the contents of precompiles/gov/gov.go
echo "Contents of precompiles/gov/gov.go:"
cat precompiles/gov/gov.go

# Search for potential Run function or similar implementation
echo -e "\nSearching for potential Run function or similar implementation:"
rg --type go -A 10 "func \(.*\) (Run|Execute|Call)" precompiles/gov/gov.go

# Search for struct definition that might implement the precompile
echo -e "\nSearching for struct definition:"
rg --type go "type.*struct" precompiles/gov/gov.go

Length of output: 4913

precompiles/gov/events.go (1)

25-47: LGTM!

The EmitVoteEvent function correctly emits an event on a Vote transaction. The function prepares the event topics and data, and adds a log entry to the state database. The implementation is accurate and enhances the governance module by enabling the tracking of voting events.

precompiles/gov/tx.go (1)

24-54: Excellent implementation of the governance voting precompile!

The Vote function is well-structured and effectively integrates Ethereum's capabilities with Cosmos SDK governance mechanisms. It correctly handles the construction of the vote message, performs the necessary checks on the caller's address, and utilizes the governance message server to process the vote.

The inclusion of smart contracts in the voting process enhances the versatility and inclusivity of the governance system. The function also demonstrates best practices by appropriately handling errors and emitting events for transparency.

Overall, this implementation is a valuable addition to the Evmos blockchain's governance functionality.

precompiles/gov/abi.json (2)

6-30: LGTM!

The Vote event captures all the necessary information about a vote cast, including the voter's address, proposal ID, and the chosen option. The parameter types are appropriate for their intended use.

---

31-64: LGTM!

The vote function has a well-defined signature that captures all the necessary information for a voting operation. The use of an enum for the option parameter provides type safety and clarity. The metadata parameter allows flexibility for voters to provide additional context about their vote. The boolean return value provides a clear indication of the success or failure of the voting operation.

precompiles/gov/types.go (3)

18-21: LGTM!

The EventSetWithdrawAddress struct is well-defined with appropriate field names and types to capture the event data for the SetWithdrawAddress transaction.

---

24-28: LGTM!

The EventVote struct is well-defined with appropriate field names and types to capture the event data for the Vote transaction.

---

31-64: LGTM!

The NewMsgVote function is well-implemented with proper validation checks on the input arguments. It creates a new MsgVote instance only if all the required data is provided and is of the correct type. The function handles errors appropriately and returns the MsgVote object, the voter's address, and a nil error upon successful validation.

precompiles/gov/IGov.sol (5)

1-2: LGTM!

The SPDX license identifier and Solidity version pragma are correctly specified.

---

4-13: LGTM!

The constant GOV_PRECOMPILE_ADDRESS and the instance GOV_CONTRACT are correctly defined, allowing interaction with the governance precompile contract using the IGov interface.

---

15-29: LGTM!

The enum VoteOption is well-defined with clear and self-explanatory voting options.

---

35-44: LGTM!

The event Vote is well-defined with relevant parameters, and the voter parameter is correctly marked as indexed for efficient event filtering.

---

48-59: LGTM!

The function vote is well-defined with relevant parameters and is correctly marked as external. Returning a boolean value to indicate the success of the vote is a good practice.

precompiles/gov/setup_test.go (1)

1-76: LGTM!

The code segment introduces a well-structured test suite for the governance precompile functionality. It follows the standard practices for setting up a test suite using the testify package.

The PrecompileTestSuite struct encapsulates the necessary components for testing, and the SetupTest method initializes the test environment with a sample governance proposal and the precompile instance.

The code segment does not contain any apparent issues with the logic or syntax. It provides a solid foundation for testing the governance precompile functionality.

precompiles/gov/events_test.go (1)

18-86: Excellent test coverage for the voting event functionality!

The TestVoteEvent function is a well-structured and comprehensive test suite for the voting event functionality of the governance precompile. It covers both the success and error scenarios, ensuring thorough testing of the voting mechanism.

Some notable strengths of this test function include:

1. Clear and readable structure with setup, execution, and verification phases.
2. Table-driven test cases that allow for easy addition of new test cases and improve readability.
3. Appropriate assertions to verify the expected behavior and event details.
4. Use of constants for method names and event types, enhancing code maintainability.
5. Utilization of helper functions for common tasks like unpacking event logs, promoting code reuse and reducing duplication.

Overall, this test function provides a solid foundation for ensuring the reliability of the voting event functionality and facilitates future additions and modifications.

precompiles/gov/tx_test.go (1)

18-129: Excellent test coverage for the Vote method!

The TestVote function provides a comprehensive set of test cases to validate the behavior of the Vote method in various scenarios. The test cases cover important aspects such as invalid input handling, address verification, and successful voting.

Some key strengths of the test function:

• Well-structured and follows a clear pattern for defining and executing test cases.
• Each test case is properly named and includes setup (malleate), validation (postCheck), and expected error conditions.
• Uses the testutil.NewPrecompileContract helper function to set up the precompile contract for each test case.
• Properly asserts the expected outcomes using the s.Require() assertions.

The test function provides good coverage and helps ensure the correctness and robustness of the Vote method. Great job!

precompiles/gov/gov_test.go (1)

16-39: LGTM!

The TestIsTransaction function is well-structured and covers the necessary test cases. It correctly verifies that the IsTransaction method of the precompile identifies the VoteMethod as a transaction and marks an invalid method as not a transaction.

precompiles/gov/gov.go (1)

1-142: LGTM! The code segment introduces a well-structured and modular precompiled contract for governance functionalities.

The implementation follows best practices and effectively handles key aspects such as:

1. Loading the ABI from an embedded JSON file for seamless interaction with the EVM.
2. Initializing the precompile instance with necessary configurations like gas settings and approval expiration.
3. Calculating the required gas for executing methods and handling insufficient input length scenarios.
4. Orchestrating the execution of governance methods, managing gas consumption, and handling errors gracefully.
5. Distinguishing between transaction and query methods, currently supporting the voting operation.
6. Providing a precompile-specific logger for better traceability during execution.

The code segment is modular, with clear separation of concerns and responsibilities, making it maintainable and extensible.

precompiles/gov/integration_test.go (3)

86-100: LGTM!

The test case correctly checks the behavior when the provided gas limit is too low. It verifies that the precompile returns an out-of-gas error and ensures that the tally result remains unchanged.

---

102-111: LGTM!

The test case correctly checks the behavior when the origin address is different than the voter. It verifies that the precompile returns the expected error with the correct error message and addresses.

---

113-129: LGTM!

The test case correctly checks the behavior of a successful vote. It verifies that the precompile returns no error and emits the expected event. It also ensures that the tally result is updated correctly after the vote.

x/evm/keeper/static_precompiles.go (3)

14-14: LGTM!

The import statement for the govkeeper package is necessary and looks good.

---

20-20: LGTM!

The import statement for the govprecompile package is necessary and looks good.

---

46-46: Excellent work!

The changes to introduce the new governance precompile are implemented correctly:

• The NewAvailableStaticPrecompiles function is updated to accept the govKeeper parameter.
• The govPrecompile instance is created using the govKeeper and authzKeeper.
• Error handling is done appropriately by panicking with a descriptive error message if the precompile instantiation fails.
• The new govPrecompile is added to the precompiles map, making it available for use within the EVM.

These changes expand the capabilities of the EVM by allowing governance-related operations to be executed through precompiles.

Also applies to: 93-97, 108-108

x/evm/types/params.go (1)

36-36: Approve the addition of the governance precompile address.

The code change looks good and adds the GovPrecompileAddress to the list of default active precompiles.

However, it would be helpful to provide more context about the specific functionality and capabilities of the governance precompile.

• What are the key features and operations supported by the governance precompile?
• How does the introduction of this precompile enhance the overall governance capabilities of the Evmos platform?
• Are there any potential security or performance implications that need to be considered with the addition of this precompile?

Providing this additional information in the PR description or linked documentation would help reviewers better understand the impact and scope of this change.

CHANGELOG.md (4)

47-47: LGTM!

The addition of the governance precompile for voting transactions in the precompiles module looks good. It's appropriately categorized as a state machine breaking change.

---

Line range hint 1-46: Looks good!

The unreleased section of the changelog is well structured and documents the various changes across different modules appropriately. The categorization of the changes into improvements, state machine breaking changes, and bug fixes provides good clarity.

Tools

Markdownlint

44-44: Expected: 120; Actual: 136
Line length

(MD013, line-length)

---

Line range hint 48-91: Looks good!

The changelog for the v19.2.0 release is well documented. The improvements and state machine breaking changes are clearly listed and categorized appropriately.

Tools

Markdownlint

44-44: Expected: 120; Actual: 136
Line length

(MD013, line-length)

---

Line range hint 92-97: Looks good!

The changelog for the v19.1.0 release is well documented. The listed improvements are clear and concise.

Tools

Markdownlint

44-44: Expected: 120; Actual: 136
Line length

(MD013, line-length)