fix: distribution precompile 32-byte withdraw address inflates native…

[matteyu]

Description

Fixes the distribution-precompile 32-byte withdraw address supply-inflation bug. When a balance event's account is not exactly 20 bytes (e.g. a 32-byte bech32 withdraw, module, or CosmWasm contract account), common.BytesToAddress truncates it to the trailing 20 bytes, causing the StateDB commit to mint a duplicate balance and inflate native supply.

AfterBalanceChange now skips mirroring any non-20-byte account (isMirrorableEVMAddress guard) in the CoinSpent, CoinReceived, and FractionalBalanceChange cases, so only bijective SDK↔EVM accounts are mirrored.

Most critical to review: precompiles/common/balance_handler.go

---

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• tackled an existing issue or discussed with a team member
• left instructions on how to review the changes
• targeted the main branch — N/A: targets feat/v0.6.0 (the v0.6.0-fork.1 release lineage kiichain pins); a v0.6.0-fork.2 tag will follow

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 8808e47f-690e-4177-a319-ae3783a2695e

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/distribution-32byte-withdraw

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}