[giga] Add EvmKeeper mode to Giga Executor

[pdrobnjak]

Summary

• Add an alternative mode where the Giga executor uses the original EvmKeeper (x/evm/keeper) instead of GigaEvmKeeper (giga/deps/xevm/keeper)
• This enables comparing behavior between the two keepers for debugging and validation
• Complements PR [giga] Add UseRegularStore flag to GigaEvmKeeper for testing fallback #2745 (store-switching within GigaEvmKeeper) by providing full keeper comparison

Changes

• giga/executor/keeper.go: Define GigaExecutorKeeper interface that abstracts over both keeper implementations
• giga/executor/evmkeeper_adapter.go: Adapter wrapping original EvmKeeper to satisfy the interface (uses ctx.KVStore())
• giga/executor/gigaevmkeeper_wrapper.go: Wrapper for GigaEvmKeeper to satisfy the interface (uses ctx.GigaKVStore())
• giga/deps/xevm/keeper/giga_executor_keeper.go: Add NewStateDB() and WriteReceiptFromInterface() methods
• giga/executor/config/config.go: Add use_evm_keeper config flag
• app/app.go: Add keeper selection logic and update executeEVMTxWithGigaExecutor() to use the interface

Configuration

[giga_executor]
enabled = true
use_evm_keeper = true  # Use original EvmKeeper instead of GigaEvmKeeper

Key Differences Between Modes

Aspect	GigaEvmKeeper (default)	EvmKeeper (use_evm_keeper=true)
Store access	ctx.GigaKVStore()	ctx.KVStore()
StateDB	giga/deps/xevm/state	x/evm/state
StateDB flush	MultiStore + GigaMultiStore	MultiStore only

Test plan

• All existing giga tests pass
• Code compiles successfully
• Manual testing with both keeper modes
• Compare receipts and state between modes

🤖 Generated with Claude Code

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Jan 23, 2026, 3:38 PM

[codecov]

Codecov Report

❌ Patch coverage is 0.75188% with 132 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.83%. Comparing base (c320963) to head (99695a1).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
giga/executor/evmkeeper_adapter.go	0.00%	39 Missing ⚠️
giga/executor/gigaevmkeeper_wrapper.go	0.00%	36 Missing ⚠️
giga/deps/xevm/keeper/giga_executor_keeper.go	0.00%	33 Missing ⚠️
app/app.go	4.54%	21 Missing ⚠️
giga/executor/config/config.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2747      +/-   ##
==========================================
- Coverage   43.86%   43.83%   -0.03%     
==========================================
  Files        1987     1990       +3     
  Lines      163197   163319     +122     
==========================================
+ Hits        71579    71590      +11     
- Misses      85105    85208     +103     
- Partials     6513     6521       +8     

Flag	Coverage Δ
sei-chain	45.96% <0.75%> (-0.09%)	⬇️
sei-cosmos	37.72% <ø> (+<0.01%)	⬆️
sei-db	68.72% <ø> (ø)
sei-tendermint	47.53% <ø> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
giga/executor/config/config.go	0.00% <0.00%> (ø)
app/app.go	56.56% <4.54%> (-0.29%)	⬇️
giga/deps/xevm/keeper/giga_executor_keeper.go	0.00% <0.00%> (ø)
giga/executor/gigaevmkeeper_wrapper.go	0.00% <0.00%> (ø)
giga/executor/evmkeeper_adapter.go	0.00% <0.00%> (ø)

... and 23 files with indirect coverage changes

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