[giga] honor configured sstore gas values

[stevenlanders]

Describe your changes and provide context

• sstore should cost the same on non-giga as giga
• we recently made this a chain param, so it needs to be the same

Testing performed to validate your change

• new unit tests
• existing integration tests

[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 26, 2026, 5:38 PM

[codecov]

Codecov Report

❌ Patch coverage is 79.31034% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.02%. Comparing base (77cc04e) to head (35bea23).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
giga/executor/internal/interpreter.go	33.33%	3 Missing and 1 partial ⚠️
giga/executor/internal/host_context.go	90.47%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2753      +/-   ##
==========================================
+ Coverage   57.00%   57.02%   +0.01%     
==========================================
  Files        2004     2004              
  Lines      164603   164629      +26     
==========================================
+ Hits        93838    93884      +46     
+ Misses      62560    62541      -19     
+ Partials     8205     8204       -1     

Flag	Coverage Δ
sei-chain	41.79% <79.31%> (+<0.01%)	⬆️
sei-cosmos	48.03% <ø> (ø)
sei-db	68.72% <ø> (ø)
sei-tendermint	58.99% <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/executor.go	57.89% <100.00%> (+2.33%)	⬆️
giga/executor/internal/host_context.go	33.01% <90.47%> (+5.55%)	⬆️
giga/executor/internal/interpreter.go	52.08% <33.33%> (-2.68%)	⬇️

... and 16 files with indirect coverage changes

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[yzang2019]

Rather than passing the SSTORE into HostContext which requires to change the constructor, would it be easier to just add a function within HostContext to get the SStoreGas from chainConfig.SeiSstoreSetGasEIP2200 directly?

[stevenlanders]

I gave it some thought - i'm thinking there will likely be other things like this, so i adjusted the constructor to accept a HostContextConfig which will pre-render a gas sstore delta, avoid the pointer dereferences for SeiSstoreSetGasEIP2200 per tx sstore.