Run nitro with rust validator

[pmikolajczyk41]

Replace the Go validation node (nitro-val) with the Rust validation server (crates/validator) in the nitro-testnode setup. The Rust server is fully compatible with the Go validation client and exposes JIT validation over HTTP JSON-RPC.

Changes

Dockerfile

• Build the Rust validator binary in the prover-builder stage (alongside jit, prover-lib, prover-bin)
• Copy validator binary into the nitro-node-dev image at /usr/local/bin/
• Symlink legacy machine directories from /home/user/nitro-legacy/machines/ into /home/user/target/machines/ so the Rust validator can serve all module roots (latest + legacy) from a single --root-path
• Bump Go version from 1.25.1 to 1.25.8 (I had some problems with fetching the old version)

staker/block_validator.go

• Allow http:// and https:// URL schemes for validation server configs (previously only ws:///wss:// were accepted)
• Upgrade "result validated" log from Trace to Info level with additional fields (batch, posInBatch) for easier debugging

nitro-testnode (submodule)

• docker-compose.yaml: Replace nitro-val with validator as entrypoint for the validation_node service, configure it with CLI args (--address, --root-path), add RUST_LOG=tower_http=debug,info for HTTP-level request tracing, and add a healthcheck so dependent services wait for the server to be ready
• scripts/config.ts: Remove jwtsecret from block-validator config (Rust server doesn't use JWT auth)
• scripts/index.ts: Change default validation node URL from ws://validation_node:8549 to http://validation_node:4141

Reproduction

cd nitro-testnode
./test-node.bash --dev --init-force --validate

Expected output

# validation_node (Rust server) — HTTP request/response traces from tower_http:
DEBUG tower_http: started processing request method=POST uri=/
DEBUG tower_http: finished processing request latency=42ms status=200

# validator (Go node) — Block validation confirmations:
INFO block validated count=42 blockHash=0x... batch=1 posInBatch=0

companion PR: OffchainLabs/nitro-testnode#181

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 32.57%. Comparing base (e89bc08) to head (627ffff).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4497      +/-   ##
==========================================
- Coverage   32.93%   32.57%   -0.37%     
==========================================
  Files         495      495              
  Lines       58648    58648              
==========================================
- Hits        19317    19103     -214     
- Misses      35912    36187     +275     
+ Partials     3419     3358      -61     

[github-actions]

❌ 9 Tests Failed:

Tests completed	Failed	Passed	Skipped
4366	9	4357	0

View the top 3 failed tests by shortest run time

TestEndToEnd_ManyEvilValidators

Stack Traces | -0.000s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210761
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

goroutine 5417675 [select]:
github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast.func1()
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:107 +0xd9
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210758
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

goroutine 5417671 [select]:
github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast.func1()
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:107 +0xd9
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210758
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

goroutine 5417196 [select]:
github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast.func1()
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:107 +0xd9
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210764
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

TestEndToEnd_ManyEvilValidators/honest_essential_edges_confirmed_by_challenge_win

Stack Traces | -0.000s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210761
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

goroutine 5417675 [select]:
github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast.func1()
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:107 +0xd9
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210758
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

goroutine 5417671 [select]:
github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast.func1()
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:107 +0xd9
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210758
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

goroutine 5417196 [select]:
github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast.func1()
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:107 +0xd9
created by github.com/offchainlabs/nitro/bold/containers/events.(*Producer[...]).Broadcast in goroutine 210764
	/home/runner/work/nitro/nitro/bold/containers/events/producer.go:106 +0x10a

TestMultigasStylus_StorageWrite/out_of_gas

Stack Traces | 0.010s run time

=== RUN   TestMultigasStylus_StorageWrite/out_of_gas
INFO [03-11|16:52:48.150] Starting peer-to-peer node               instance=test-stack-name/linux-amd64/go1.25.7
WARN [03-11|16:52:48.150] P2P server will be useless, neither dialing nor listening
INFO [03-11|16:52:48.150] Started log indexer
INFO [03-11|16:52:48.150] message position already seen in l1 price data cache, ignoring
INFO [03-11|16:52:48.150] New local node record                    seq=1,773,247,968,150 id=a755d9b0059fe476   ip=127.0.0.1 udp=0 tcp=0
INFO [03-11|16:52:48.150] Started P2P networking                   self=enode://2c8e78ac144185098327b3d1fb7ee9b1aa6c96e5d58037453b229a7fa3115915e4f3366781c7ca978fc12190ae99bf3d367653de9cb6141cc6a50a5298b514c1@127.0.0.1:0
INFO [03-11|16:52:48.151] Log index head rendering in progress     firstblock=0 lastblock=1 processed=2 remaining=0 elapsed=1.432s
INFO [03-11|16:52:48.151] Log index head rendering finished        firstblock=0 lastblock=1 processed=2 elapsed=1.432s
    multigas_stylus_program_test.go:380: 
        	Error Trace:	/home/runner/work/nitro/nitro/system_tests/multigas_stylus_program_test.go:380
        	Error:      	An error is expected but got nil.
        	Test:       	TestMultigasStylus_StorageWrite/out_of_gas
--- FAIL: TestMultigasStylus_StorageWrite/out_of_gas (0.01s)

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