cmd, ethconfig: consolidate flag reading and remove global statecfg side effects#20390
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Add tests that capture the exact ethconfig.Config produced by the full flag parsing pipeline (SetEthConfig + ApplyFlagsForEthConfig). These tests serve as a safety net for the upcoming flag consolidation refactor: - TestConfigDefaults: verifies default config values (no flags) - TestConfigWithFlags: verifies 6 common flag combinations - TestConfigSnapshotStability: JSON snapshot of full config for diff Any change to the flag reading code that alters the resulting config will cause these tests to fail with a clear diff.
SetEthConfig previously called statecfg.EnableHistoricalCommitment() and set statecfg.ExperimentalConcurrentCommitment directly as side effects of flag parsing. This made config non-deterministic — the same config struct could produce different behavior depending on whether it was built by SetEthConfig or constructed programmatically. - Add ExperimentalConcurrentCommitment field to ethconfig.Sync - Remove statecfg global writes from SetEthConfig (cmd/utils/flags.go) - Apply globals from config fields in eth.New (single init point) - Config fields are now the source of truth; globals are derived The 80+ call sites that read statecfg.Schema are unchanged — they still read the globals, which are now set from config in eth.New.
The ethconfig was previously built by two separate functions called sequentially: utils.SetEthConfig() and erigoncli.ApplyFlagsForEthConfig(). The split was historical (erigon-lib vs turbo boundaries) and made it unclear where a given flag was read. Add BuildEthConfig() in node/cli that calls both in sequence, providing a single entry point for flag-to-config mapping. NewEthConfigUrfave now calls only BuildEthConfig. ApplyFlagsForEthConfig is kept as a deprecated wrapper for the cobra-based integration commands that call it independently. The import direction (node/cli → cmd/utils) prevents consolidating the other way. Flag definitions remain in their current packages.
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Pull request overview
Refactors CLI flag → ethconfig.Config construction to a single entry point and moves statecfg global mutations out of flag parsing and into node startup, laying groundwork for future componentization.
Changes:
- Introduces
BuildEthConfigas the consolidated flag-to-config builder and updates node setup to use it. - Moves commitment/trie related
statecfgglobal mutations fromcmd/utils.SetEthConfigintonode/eth.Newbased on config fields. - Adds config snapshot tests to exercise common flag combinations (and a new config field for concurrent commitment).
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.
Show a summary per file
| File | Description |
|---|---|
| node/ethconfig/config.go | Adds ExperimentalConcurrentCommitment to Sync config. |
| node/eth/backend.go | Applies config-driven statecfg globals during backend initialization. |
| node/cli/flags.go | Adds BuildEthConfig and refactors eth flag application flow. |
| cmd/utils/flags.go | Removes statecfg side effects from flag parsing; sets config fields instead. |
| cmd/erigon/node/node.go | Switches eth config construction to BuildEthConfig. |
| cmd/erigon/node/config_snapshot_test.go | Adds snapshot-style tests for config defaults and selected flag combos. |
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| if config.ExperimentalConcurrentCommitment { | ||
| statecfg.ExperimentalConcurrentCommitment = true | ||
| } |
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statecfg.ExperimentalConcurrentCommitment is treated as config-driven global state, but it's only ever set to true here. If any earlier code path sets the global to true (e.g., tests/backtester/integration commands in the same process), starting a node with config.ExperimentalConcurrentCommitment == false will not restore the intended default. Consider assigning the global explicitly from the config (set to config.ExperimentalConcurrentCommitment) rather than conditionally setting it to true.
| if config.ExperimentalConcurrentCommitment { | |
| statecfg.ExperimentalConcurrentCommitment = true | |
| } | |
| statecfg.ExperimentalConcurrentCommitment = config.ExperimentalConcurrentCommitment |
| logger := log.Root() | ||
| nodeCfg := &nodecfg.Config{} | ||
| nodeCfg.Dirs.DataDir = t.TempDir() | ||
| ethCfg := ethconfig.Defaults | ||
| erigoncli.BuildEthConfig(ctx, nodeCfg, ðCfg, logger) |
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The test initializes nodeCfg with an empty nodecfg.Config and only sets Dirs.DataDir. utils.SetEthConfig uses other Dirs fields (e.g., Dirs.Snap, Dirs.DataDir/logs) when building the downloader config, so leaving them empty can cause the snapshot tests to write/read from unexpected paths and/or emit errors. Prefer setting nodeCfg.Dirs = datadir.New(t.TempDir()) (or datadir.Open + dir.MustExist) to fully populate the directory layout used by production code.
| // TestConfigSnapshotStability creates a full JSON snapshot of the config | ||
| // from default flags. This test exists to detect ANY config field change | ||
| // during the consolidation refactor — if this test fails, the diff shows | ||
| // exactly which fields changed. | ||
| func TestConfigSnapshotStability(t *testing.T) { | ||
| cfg := buildEthConfig(t, nil) | ||
| snap := snapshotConfig(cfg) | ||
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| // Marshal to JSON for readable diffs | ||
| got, err := json.MarshalIndent(snap, "", " ") | ||
| require.NoError(t, err) | ||
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| // If this test fails during refactoring, the diff shows which field changed. | ||
| // Update the expected JSON only after verifying the change is intentional. | ||
| t.Logf("Config snapshot (update expected if intentional):\n%s", string(got)) | ||
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| // Verify key structural invariants rather than exact JSON match, | ||
| // since some defaults depend on runtime (CPU count, etc.) |
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This test is described as a "full JSON snapshot" / "detect ANY config field change" and the PR description mentions golden-file snapshot testing, but the implementation only logs JSON and asserts a small set of invariants. Either add an actual golden-file comparison (e.g., testdata/*.golden.json with an update workflow) or adjust the test name/comments to reflect that it's an invariant-based smoke test over a subset of fields.
## Summary Second PR in the componentization series (after #20390). Adds the core component framework under `node/app/`: - **Component lifecycle**: `node/app/component/` — typed components with dependency tracking, hierarchical domains, and ordered activation/deactivation - **Event bus**: `node/app/event/` — typed publish/subscribe for inter-component communication, replacing direct callback coupling - **Worker pool**: `node/app/workerpool/` — work-stealing pool for component task execution - **Utilities**: `node/app/util/` — Result types, await helpers, execution pool This is a pure addition — no existing code is modified (except go.mod/go.sum). The framework will be used by subsequent PRs to extract backend.go subsystems (downloader, txpool, sentry, etc.) into independent components. Ported from the `app_components` branch, with the stale `erigon-lib` test file removed. ## Test plan - [x] `make lint` passes - [x] `make erigon integration` builds - [x] `go test ./node/app/...` — all component/event/workerpool tests pass - [ ] CI (unit tests, lint) --------- Co-authored-by: Alexey Sharov <AskAlexSharov@gmail.com>
Summary
First step in the componentization series. Removes global side effects from flag
parsing and consolidates config construction:
Config snapshot tests: adds golden-file tests that capture the exact
EthConfigproduced by flag combinations, preventing accidental regressionsas config wiring is refactored.
statecfg globals → config fields: moves
statecfg.OverridePragueTimeandsimilar package-level variables into
EthConfigfields, eliminatinginit-order-dependent side effects during flag reading.
BuildEthConfig consolidation: introduces a single entry point for building
EthConfigfrom CLI flags, replacing scattered calls across node setup.These are safe, incremental refactors — no behavior changes, no new features.
Foundation for subsequent component extraction PRs.
Test plan
make lintcleanmake erigon integrationbuilds