Add EVM stress workload tooling

[codchen]

Summary

• Adds ./scripts/evm_stress.sh, which initializes a local seid node, patches genesis with deterministic sender accounts, starts the node, and runs the transfer workload.
• Adds scripts/evm_stress/main.go, which generates deterministic sender keys, optionally dumps their derived Sei addresses for genesis funding, and sends nonce-0 EVM transfers from unique senders to a shared recipient at the target rate.
• Ignores the local evm_stress build artifact.

This is split out from #3376 so the investigation tooling can be reviewed independently from logging and execution optimizations.

Test Plan

• go test ./scripts/evm_stress
• go run github.com/securego/gosec/v2/cmd/gosec@v2.22.11 ./scripts/evm_stress/...

---

Note

Low Risk
Low risk: adds standalone local stress-test scripts and ignores a new build artifact, without modifying chain runtime logic.

Overview
Adds a local EVM stress-testing workload: scripts/evm_stress.sh initializes a local seid, bulk-patches genesis.json with many pre-funded deterministic sender accounts, starts the node, tails only a couple targeted log lines, waits for the EVM RPC, then runs the workload.

Introduces scripts/evm_stress/main.go, a Go load generator that can dump sender Sei bech32 addresses for genesis funding and then sends single nonce=0 EIP-1559 transfers from 50k unique senders to one recipient at a target rate (500 TPS) using a shared rate limiter across workers.

Updates .gitignore to exclude the evm_stress local build artifact.

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[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	May 11, 2026, 3:20 AM

[codecov]

Codecov Report

❌ Patch coverage is 0% with 73 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.22%. Comparing base (0543e0e) to head (66f51e7).

Files with missing lines	Patch %	Lines
scripts/evm_stress/main.go	0.00%	73 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3404      +/-   ##
==========================================
- Coverage   59.24%   59.22%   -0.03%     
==========================================
  Files        2110     2111       +1     
  Lines      174149   174222      +73     
==========================================
  Hits       103175   103175              
- Misses      62041    62114      +73     
  Partials     8933     8933              

Flag	Coverage Δ
sei-chain-pr	0.00% <0.00%> (?)
sei-db	70.41% <ø> (ø)

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

Files with missing lines	Coverage Δ
scripts/evm_stress/main.go	0.00% <0.00%> (ø)

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[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

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[cursor]

Gitignore pattern matches source directory too broadly

Medium Severity

The evm_stress gitignore pattern (without a leading /) matches any file or directory named evm_stress at any level in the tree, including scripts/evm_stress/. While already-tracked files like main.go remain tracked, any new files added under scripts/evm_stress/ (e.g. test files, additional Go sources) will be silently ignored by git. The pattern likely needs a leading slash (/evm_stress) to restrict the match to the root-level build artifact only.

 

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[cursor]

Infinite loop in waitForBalance lacks timeout

Low Severity

waitForBalance spins in an infinite for loop polling for a positive balance, with no timeout or context cancellation check. If the genesis patching fails or the node doesn't produce a block, this hangs forever with no diagnostic output. Since ctx is context.Background(), there's no external cancellation path either.

 

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