refactor: avoid converting origin coin to ERC20 during crosschain refund

[zakir-code]

Summary by CodeRabbit

Release Notes

• New Features

  • Introduced caching capabilities in the Erc20Keeper interface, allowing retrieval and setting of cached values.
  • Enhanced refund process with improved validation and error handling for outgoing bridge calls.

• Bug Fixes

  • Streamlined error handling in the IBCCoinRefund method for better clarity and efficiency.

• Tests

  • Updated test cases to include new caching logic for IBC transfers, ensuring proper error handling.

These updates improve the overall functionality and reliability of the cross-chain interactions within the application.

[coderabbitai]

Walkthrough

The pull request introduces several modifications across multiple files in the crosschain and erc20 packages. Key changes include enhancements to error handling and validation logic in the RefundOutgoingBridgeCall method, updates to caching mechanisms in the MockErc20Keeper, and the addition of new caching methods in both the Erc20Keeper interface and the Keeper struct. The overall structure of existing methods is maintained, with a focus on improving clarity and efficiency in the codebase.

Changes

File Path	Change Summary
x/crosschain/keeper/bridge_call_out.go	Updated RefundOutgoingBridgeCall method with new validation for origin amount and enhanced error handling.
x/crosschain/keeper/many_to_one.go	Altered logic in IBCCoinRefund method; streamlined error handling without changing core functionality.
x/crosschain/mock/expected_keepers_mocks.go	Added GetCache and SetCache methods to MockErc20Keeper for improved caching in tests.
x/crosschain/types/expected_keepers.go	Introduced GetCache method to Erc20Keeper interface for retrieving cached values.
x/erc20/keeper/cache.go	Added GetCache method to Keeper struct for retrieving cache values.
x/ibc/middleware/keeper/relay_test.go	Added import for crosschaintypes and modified TestOnAcknowledgementPacket to set cache for IBC transfers.

Possibly related PRs

• feat: add bridge call refund callback #484: Changes in bridge_call_refund.go related to refund processes connect with updates in RefundOutgoingBridgeCall.
• refactor(crosschain): remove refundCallback #528: Refactoring in bridge_call_refund.go aligns with modifications in RefundOutgoingBridgeCall.
• test: many to one test #705: New test cases in many_to_one_test.go relate to cross-chain operations and token handling.
• refactor: improve many-to-one logic for SendToFxExecuted #710: Improvements in SendToFxExecuted may connect with logic refactoring in many_to_one.go.
• refactor(x/crosschain): move base to bridgeToken to AddToOutgoingPool #716: Updates in addToOutgoingPool relate to token management changes in the main PR.
• refactor(bridgecall): token conversion logic #717: Error handling updates in bridge_call_in.go are relevant to changes in token handling.
• refactor(ibc): refine the conversion logic between ibc coin and base coin during ibc transfer #723: Refinements in IBC and base coin conversion logic align with changes in many_to_one.go.
• refactor(crosschain): simplify interface references for the erc20 module #731: Simplification of interface references relates to modifications in expected_keepers.go.
• refactor(precompile): migrate cross-chain logic to cosmos code #741: Migration of cross-chain logic connects with updates in keeper.go.
• perf: cache origin token amount during crosschain #755: Caching of origin token amounts relates to changes in bridge_call_out.go.
• chore: migrate bridge balances #760: Migration of bridge balances is relevant to updates in upgrade.go.

🐰 In the meadow where bunnies play,
New methods hop in, brightening the day.
Caches are set, and errors are tamed,
With each little change, our code is acclaimed!
So let’s dance and rejoice, for the work is done,
In the world of crosschain, we’ve just begun! 🌼

---

Thank you for using CodeRabbit. We offer it for free to the OSS community and would appreciate your support in helping us grow. If you find it useful, would you consider giving us a shout-out on your favorite social media?

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

• Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  • I pushed a fix in commit <commit_id>, please review it.
  • Generate unit testing code for this file.
  • Open a follow-up GitHub issue for this discussion.
• Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
  • @coderabbitai generate unit testing code for this file.
  • @coderabbitai modularize this function.
• PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
  • @coderabbitai read src/utils.ts and generate unit testing code.
  • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.
  • @coderabbitai help me debug CodeRabbit configuration file.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (Invoked using PR comments)

• @coderabbitai pause to pause the reviews on a PR.
• @coderabbitai resume to resume the paused reviews.
• @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
• @coderabbitai full review to do a full review from scratch and review all the files again.
• @coderabbitai summary to regenerate the summary of the PR.
• @coderabbitai resolve resolve all the CodeRabbit review comments.
• @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
• @coderabbitai help to get help.

Other keywords and placeholders

• Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
• Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
• Add @coderabbitai anywhere in the PR title to generate the title automatically.

CodeRabbit Configuration File (.coderabbit.yaml)

• You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
• Please see the configuration documentation for more information.
• If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json

Documentation and Community

• Visit our Documentation for detailed information on how to use CodeRabbit.
• Join our Discord Community to get help, request features, and share feedback.
• Follow us on X/Twitter for updates and announcements.

[coderabbitai]

Actionable comments posted: 3

🧹 Outside diff range and nitpick comments (2)

x/crosschain/types/expected_keepers.go (1)

52-52: LGTM! Consider adding a comment for consistency.

The addition of the GetCache method completes the set of CRUD operations for the cache, which is a good improvement. The method signature is appropriate and follows Go conventions.

Consider adding a brief comment describing the method's purpose, similar to the other methods in this interface, for consistency and improved readability. For example:

// GetCache retrieves a cached value associated with the given key
GetCache(ctx context.Context, key string) (sdkmath.Int, error)

x/crosschain/keeper/bridge_call_out.go (1)

144-157: Add unit tests for the new refund logic

The new logic introduced in lines 144-157 adds important validation steps in the RefundOutgoingBridgeCall method. To ensure reliability, unit tests should be added to cover these new cases.

Please add unit tests for the following scenarios:

• When originAmount is retrieved successfully from the cache.
• When originAmount is not found and defaults to zero.
• When baseCoins are less than originAmount, and the method returns the expected error.
• When baseCoins correctly subtract originCoin, and the subsequent refund process works as intended.

This will help prevent future regressions and maintain code quality.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 378231d and 21bdc48.

📒 Files selected for processing (6)

• x/crosschain/keeper/bridge_call_out.go (3 hunks)
• x/crosschain/keeper/many_to_one.go (1 hunks)
• x/crosschain/mock/expected_keepers_mocks.go (1 hunks)
• x/crosschain/types/expected_keepers.go (1 hunks)
• x/erc20/keeper/cache.go (1 hunks)
• x/ibc/middleware/keeper/relay_test.go (2 hunks)

🧰 Additional context used

🔇 Additional comments (5)

x/erc20/keeper/cache.go (1)

21-23: LGTM! Well-integrated cache retrieval method.

The new GetCache method is a valuable addition to the Keeper struct. It complements the existing cache-related methods (HasCache, SetCache, DeleteCache) and provides a consistent way to retrieve cached values. The method signature and implementation align well with the established patterns in this file.

x/ibc/middleware/keeper/relay_test.go (3)

15-15: LGTM: New import added correctly.

The new import for crosschaintypes is properly formatted and follows Go conventions. The alias is clear and descriptive, which enhances code readability.

---

84-84: Approve with clarification: New cache setting for IBC transfers.

The addition of caching for IBC transfers aligns with the PR objective of refactoring the crosschain refund process. This change appears to be correct and consistent with the modifications mentioned in other files.

However, could you please clarify the purpose of the hardcoded value 1 in NewIBCTransferKey(packet.SourceChannel, 1)? If this represents a dynamic value (e.g., a sequence number), it might be better to derive it from the packet or other context.

---

Line range hint 1-184: Summary: Minimal changes enhance IBC transfer testing.

The changes in this file are minimal but significant. They introduce caching for IBC transfers, which aligns with the PR objective of refactoring the crosschain refund process. The new import and the additional cache setting in the test case for error acknowledgments are well-integrated into the existing test structure. These modifications enhance the test coverage by ensuring that the new caching mechanism is verified in error scenarios.

Overall, the changes appear to be correct and do not introduce any obvious issues. They contribute to a more robust testing framework for the IBC middleware keeper.

x/crosschain/mock/expected_keepers_mocks.go (1)

421-434: LGTM: GetCache method implementation looks good.

The GetCache method is correctly implemented using the gomock framework. It properly mocks the cache retrieval operation with appropriate parameters and return types.