Bump sei go-ethereum to v1.15.7-sei-20

[amir-deris]

Describe your changes and provide context

Bumps the sei-protocol/go-ethereum fork dependency from v1.15.7-sei-19 to v1.15.7-sei-20.

Notable changes picked up in this bump:
https://github.com/sei-protocol/go-ethereum/releases/tag/v1.15.7-sei-20

Testing performed to validate your change

• go mod tidy / go mod verify against the new fork tag.

[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	Aug 14, 2026, 8:56 AM

[cursor]

PR Summary

Medium Risk
Bumping the Sei go-ethereum fork can change EVM execution, state, and transaction validation across the chain even though this PR only touches module files; review the fork release notes before merging.

Overview
Updates the github.com/ethereum/go-ethereum replace in go.mod from github.com/sei-protocol/go-ethereum v1.15.7-sei-19 to v1.15.7-sei-20, and refreshes the matching go.sum entries. There are no application source changes in this repo—only dependency resolution.

Behavioral changes come from the fork release (v1.15.7-sei-20); anything that imports github.com/ethereum/go-ethereum (EVM ante, execution, types, etc.) will pick up that version at build time.

^{Reviewed by Cursor Bugbot for commit 4e1b4ec. Bugbot is set up for automated code reviews on this repo. Configure here.}

[seidroid]

Mechanical 3-line bump of the sei-protocol/go-ethereum fork from v1.15.7-sei-19 to v1.15.7-sei-20: the go.mod replace directive and both go.sum lines are updated consistently, no other module or file in the tree pins the fork version, and the unchanged /go.mod hash matches a fork tag whose own go.mod did not change. Nothing to flag; checksum validity against the upstream tag is verified by CI.

Findings: 0 blocking | 0 non-blocking | 0 posted inline

Blockers

• None at the file/PR level.

Non-blocking

• None at the file/PR level.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.47%. Comparing base (fcde0b0) to head (4e1b4ec).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3920      +/-   ##
==========================================
- Coverage   59.49%   58.47%   -1.02%     
==========================================
  Files        2325     2229      -96     
  Lines      198659   188027   -10632     
==========================================
- Hits       118187   109956    -8231     
+ Misses      69230    67670    -1560     
+ Partials    11242    10401     -841     

Flag	Coverage Δ
sei-db	70.62% <ø> (ø)
sei-db-state-db	?

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