[ConfigManager] Register Sections 3/4

app/params/config.go

@@ -1,6 +1,7 @@
 package params
 
 import (
+	"github.com/sei-protocol/sei-chain/config/registry"
 	evmrpcconfig "github.com/sei-protocol/sei-chain/evmrpc/config"
 	srvconfig "github.com/sei-protocol/sei-chain/sei-cosmos/server/config"
 	"github.com/sei-protocol/sei-chain/sei-cosmos/types/address"
@@ -94,8 +95,11 @@ const (
 )
 
 // IsFullnodeType returns true if the node is a fullnode-like node (full or archive)
+//
+// The rule itself lives in the configuration registry, because a section's own package needs the same
+// fact and cannot import this one.
 func (m NodeMode) IsFullnodeType() bool {
-	return m == NodeModeFull || m == NodeModeArchive
+	return registry.IsFullnodeMode(registry.Mode(m))
 }
 
 // setValidatorTypeTendermintConfig sets common Tendermint config for validator-like nodes

config/registry/detach_test.go

@@ -0,0 +1,65 @@
+package registry_test
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/sei-protocol/sei-chain/config/registry"
+)
+
+// listBearing is a probe whose default is a package-level variable, which is the usual shape.
+type listBearing struct {
+	Allowed []string          `mapstructure:"allowed"`
+	Labels  map[string]string `mapstructure:"labels"`
+	Absent  []string          `mapstructure:"absent"`
+}
+
+var listBearingDefault = listBearing{
+	Allowed: []string{"callTracer", "prestateTracer"},
+	Labels:  map[string]string{"chain": "pacific-1"},
+}
+
+// TestAResolvedListIsTheCallersToWriteInto covers what a caller may do with a resolved value.
+//
+// A section's default is usually a package-level variable, so handing out its slice hands out the array
+// that variable holds. A caller sorting or de-duplicating a resolved list in place, which is what a caller
+// producing deterministic output does, would rewrite that variable for the whole process: every later
+// resolution and every reader that copies the same struct. Two of the lists this reaches in practice are
+// deny lists, so the rewrite is silent and it is a security control.
+func TestAResolvedListIsTheCallersToWriteInto(t *testing.T) {
+	registry.Reset()
+	registry.RegisterSection("probe", &listBearing{}, func(registry.Mode) any { return listBearingDefault })
+	for _, d := range registry.Defects() {
+		t.Fatalf("the probe was refused: %v", d.Err)
+	}
+
+	resolved, err := registry.Resolve(registry.ModeFull, registry.Sources{})
+	if err != nil {
+		t.Fatalf("Resolve: %v", err)
+	}
+
+	resolved.Values["probe.allowed"].([]string)[0] = "written-by-the-caller"
+	resolved.Values["probe.labels"].(map[string]string)["chain"] = "written-by-the-caller"
+
+	if got := listBearingDefault.Allowed[0]; got != "callTracer" {
+		t.Errorf("writing into the resolved list changed the section's own default to %q, so every later "+
+			"resolution and every reader copying that struct carries the caller's value", got)
+	}
+	if got := listBearingDefault.Labels["chain"]; got != "pacific-1" {
+		t.Errorf("writing into the resolved map changed the section's own default to %q", got)
+	}
+
+	again, err := registry.Resolve(registry.ModeFull, registry.Sources{})
+	if err != nil {
+		t.Fatalf("Resolve: %v", err)
+	}
+	if got := again.Values["probe.allowed"]; !reflect.DeepEqual(got, []string{"callTracer", "prestateTracer"}) {
+		t.Errorf("a later resolution carries %v, so one caller's edit reached another's answer", got)
+	}
+
+	// A nil list stays nil rather than becoming an empty one, because absent and empty are different
+	// answers to a reader that checks length.
+	if got := again.Values["probe.absent"]; got == nil || !reflect.ValueOf(got).IsNil() {
+		t.Errorf("an unset list resolved to %#v, want a nil slice of its own type", got)
+	}
+}

config/registry/registry.go

@@ -26,6 +26,17 @@ const (
 // Modes returns every mode a default is asked for, in a fixed order.
 func Modes() []Mode { return []Mode{ModeValidator, ModeFull, ModeSeed, ModeArchive} }
 
+// IsFullnodeMode reports whether a node of this kind serves queries to callers other than itself.
+//
+// Stated here because more than one package needs it and they sit on opposite sides of an import edge.
+// The package that owns the node a binary was started as also owns the type that describes it, and a
+// section's own package needs the same fact to state a default that varies on it while being imported by
+// that package rather than importing it.
+//
+// An archive node counts. It serves queries, which is the property this names, and it is the mode most
+// easily forgotten when the rule is written out by hand.
+func IsFullnodeMode(mode Mode) bool { return mode == ModeFull || mode == ModeArchive }
+
 // Section is one registered configuration section.
 type Section struct {
 	// Name is the section's own segment, and the first segment of every key it declares.

config/registry/resolve.go

@@ -10,6 +10,15 @@ import (
 // Resolved is every declared key's value, plus what a caller has to be told about how it got there.
 type Resolved struct {
 	// Values carries one value per declared key.
+	//
+	// A key's Go type depends on which source answered it, and a caller that type-asserts has to expect
+	// all three. A default arrives as the field's own type, so a duration is a duration and a list is a
+	// list. A file arrives as whatever the file format decodes to, so the same duration is text and the
+	// same list is a list of untyped elements. An environment variable arrives as one string, always. This
+	// resolves values and does not convert them, so the reader that owns a key remains the thing that
+	// turns any of the three into what that key means.
+	//
+	// A value is the caller's to write into. Nothing here shares storage with a section's own default.
 	Values map[string]any
 	// Overrides are the declared keys something other than this node's defaults supplied, sorted.
 	//
@@ -259,11 +268,43 @@ func walkValues(v reflect.Value, prefix string, out map[string]any) error {
 			}
 			continue
 		}
-		out[path] = fv.Interface()
+		out[path] = detach(fv)
 	}
 	return nil
 }
 
+// detach returns a field's value with nothing shared with the struct it came from.
+//
+// A section's default is usually a package-level variable, so a slice or a map field hands out the
+// backing array that variable holds. A caller sorting or de-duplicating a resolved list in place, which is
+// what a caller producing deterministic output does, would rewrite that variable for the whole process:
+// every later resolution, and every reader that copies the same struct. Two of the lists that reach here
+// are deny lists, so the rewrite is silent and it is a security control.
+//
+// Lookup already copies a section's keys for this reason. This is the same guarantee for its values.
+func detach(v reflect.Value) any {
+	switch v.Kind() {
+	case reflect.Slice:
+		if v.IsNil() {
+			return v.Interface()
+		}
+		out := reflect.MakeSlice(v.Type(), v.Len(), v.Len())
+		reflect.Copy(out, v)
+		return out.Interface()
+	case reflect.Map:
+		if v.IsNil() {
+			return v.Interface()
+		}
+		out := reflect.MakeMapWithSize(v.Type(), v.Len())
+		for _, key := range v.MapKeys() {
+			out.SetMapIndex(key, v.MapIndex(key))
+		}
+		return out.Interface()
+	default:
+		return v.Interface()
+	}
+}
+
 // envValues reads the keys an environment supplies, from the caller's declared set.
 //
 // Driven by the declared set rather than by the environment, which is also what makes it complete:

evmrpc/config/register.go

@@ -0,0 +1,36 @@
+package config
+
+import "github.com/sei-protocol/sei-chain/config/registry"
+
+// SectionName is this section's name in the configuration key space.
+const SectionName = "evm"
+
+// Registration puts this package's configuration section in the registry.
+//
+// The owning package registers its own section, so the struct, the values and the keys come from one
+// place. This section's mapstructure tags already spell the keys its reader resolves, so the registry
+// derives what a node reads rather than restating them.
+func init() {
+	registry.RegisterSection(SectionName, &Config{}, defaults)
+}
+
+// defaults is what this section resolves to for a node that has written nothing.
+//
+// The two interface toggles answer per kind of node. A full node and an archive node serve queries, which
+// is what these interfaces are for; a validator and a seed serve none, and leaving them open would put a
+// public request surface on the node that holds a signing key. The rule is read from the registry rather
+// than restated, because the package that owns the node mode imports this one and cannot be imported back.
+//
+// Two values come from the machine rather than from a decision, and they are not one case. The worker pool
+// has a portable answer: the pool re-measures whenever the value it is given is not positive, so a file
+// carrying zero lets every node size itself, and a caller rendering into a file should write that rather
+// than this. The simulation call limit has no portable answer, because zero there is not a request to
+// measure but the absence of a limit, and the limit is the only bound on how many simulations a node runs
+// at once. Both describe the host that resolved them, so neither travels.
+func defaults(mode registry.Mode) any {
+	cfg := DefaultConfig
+	serves := registry.IsFullnodeMode(mode)
+	cfg.HTTPEnabled = serves
+	cfg.WSEnabled = serves
+	return cfg
+}

evmrpc/config/register_test.go

@@ -0,0 +1,121 @@
+package config
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+
+	"github.com/sei-protocol/sei-chain/config/registry"
+)
+
+// TestDeclaredKeysAreTheOnesItsReaderResolves holds the derived keys against the reader's own constants.
+//
+// The section registers the struct its reader fills, so a mapstructure tag is the only spelling of these
+// keys and there is no second list to fall behind. What remains is the constants ReadConfig looks up,
+// which state the same keys again in the same file, and a rename that moves one and not the other
+// compiles.
+//
+// Written out rather than derived from the struct, because a list derived from the same tags would agree
+// with itself whatever those tags said.
+func TestDeclaredKeysAreTheOnesItsReaderResolves(t *testing.T) {
+	for _, defect := range registry.Defects() {
+		if defect.Section == SectionName {
+			t.Fatalf("%s was refused, so none of its keys is declared: %v", SectionName, defect.Err)
+		}
+	}
+	want := []string{
+		flagHTTPEnabled, flagHTTPPort, flagWSEnabled, flagWSPort,
+		flagReadTimeout, flagReadHeaderTimeout, flagWriteTimeout, flagIdleTimeout,
+		flagSimulationGasLimit, flagSimulationEVMTimeout, flagCORSOrigins, flagWSOrigins,
+		flagFilterTimeout, flagMaxTxPoolTxs, flagCheckTxTimeout, flagSlow,
+		flagEnableSimulation, flagDenyList, flagMaxLogNoBlock, flagMaxLogBytes,
+		flagMaxBlocksForLog, flagMaxEstimateGasCalls, flagMaxStateOverrideAccounts,
+		flagMaxStateOverrideSlots, flagMaxSubscriptionsNewHead, flagMaxSubscriptionsLogs,
+		flagEnableTestAPI, flagMaxConcurrentTraceCalls, flagMaxConcurrentSimulationCalls,
+		flagMaxTraceLookbackBlocks, flagTraceTimeout, flagMaxTraceStructLogBytes,
+		flagTraceAllowedTracers, flagTraceAllowJSTracers, flagEnableParallelizedBlockTrace,
+		flagRPCStatsInterval, flagWorkerPoolSize, flagWorkerQueueSize, flagEVMLegacySeiApis,
+		flagTraceBakeEnabled, flagTraceBakeWorkers, flagTraceBakeQueueSize, flagTraceBakeTracers,
+		flagTraceBakeWindowBlocks, flagTraceBakeUseSnapshot, flagTraceBakeSnapshotWindow,
+		flagIPRateLimitRPS, flagIPRateLimitBurst, flagRateLimitingEnabled, flagTrustedProxyCIDRs,
+		flagBatchRequestLimit, flagBatchResponseMaxSize, flagMaxRequestBodyBytes,
+		flagMaxConcurrentRequestBytes, flagWSAdmissionTimeout, flagMaxOpenConnections,
+		flagBodyReadIdleTimeout,
+	}
+	sort.Strings(want)
+
+	section, ok := registry.Lookup(SectionName)
+	if !ok {
+		t.Fatalf("%s is not registered, so nothing resolves its keys", SectionName)
+	}
+	declared := map[string]bool{}
+	for _, key := range section.Keys {
+		declared[key] = true
+	}
+	for _, key := range want {
+		if !declared[key] {
+			t.Errorf("the reader resolves %s and no tag declares it", key)
+		}
+		delete(declared, key)
+	}
+	for key := range declared {
+		t.Errorf("%s is declared and no constant in this file resolves it", key)
+	}
+}
+
+// TestEachKindOfNodeResolvesTheInterfacesItIsFor is the mode-varying part of this section.
+//
+// A full node and an archive node serve queries, which is what these two interfaces are for. A validator
+// and a seed serve none, and an open interface on the node that holds a signing key is a public request
+// surface on the one node meant to expose the least. The values are written out here rather than taken
+// from the same rule the section reads, so a change to that rule fails this and gets looked at.
+func TestEachKindOfNodeResolvesTheInterfacesItIsFor(t *testing.T) {
+	serving := map[registry.Mode]bool{
+		registry.ModeValidator: false,
+		registry.ModeSeed:      false,
+		registry.ModeFull:      true,
+		registry.ModeArchive:   true,
+	}
+	for _, mode := range registry.Modes() {
+		want, named := serving[mode]
+		if !named {
+			t.Fatalf("mode %q has no expectation here, so a mode was added and this was not revisited", mode)
+		}
+		resolved, err := registry.Resolve(mode, registry.Sources{})
+		if err != nil {
+			t.Fatalf("mode %q: %v", mode, err)
+		}
+		for _, key := range []string{flagHTTPEnabled, flagWSEnabled} {
+			if got := resolved.Values[key]; got != want {
+				t.Errorf("mode %q: %s resolves to %v, want %v", mode, key, got, want)
+			}
+		}
+	}
+}
+
+// TestEachKeyResolvesToTheValueItsFieldHolds covers the binding a key set cannot show.
+//
+// Resolving carries the key a tag produced together with the value that tag's field held. Comparing the
+// defaults struct against itself does not: two tags on each other's fields leave the key set identical and
+// every field still holding the value it always did, so a list and a URL change places unnoticed.
+func TestEachKeyResolvesToTheValueItsFieldHolds(t *testing.T) {
+	resolved, err := registry.Resolve(registry.ModeFull, registry.Sources{})
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
+	for key, want := range map[string]any{
+		flagCORSOrigins:         DefaultConfig.CORSOrigins,
+		flagDenyList:            DefaultConfig.DenyList,
+		flagTraceAllowedTracers: DefaultConfig.TraceAllowedTracers,
+		flagEVMLegacySeiApis:    DefaultConfig.EnabledLegacySeiApis,
+		flagTrustedProxyCIDRs:   DefaultConfig.TrustedProxyCIDRs,
+		flagReadTimeout:         DefaultConfig.ReadTimeout,
+		flagHTTPPort:            DefaultConfig.HTTPPort,
+		flagIPRateLimitRPS:      DefaultConfig.IPRateLimitRPS,
+		flagMaxLogBytes:         DefaultConfig.MaxLogBytes,
+	} {
+		if got := resolved.Values[key]; !reflect.DeepEqual(got, want) {
+			t.Errorf("%s resolves to %#v (%T), want %#v (%T)", key, got, got, want, want)
+		}
+	}
+}

x/evm/blocktest/register.go

@@ -0,0 +1,24 @@
+package blocktest
+
+import "github.com/sei-protocol/sei-chain/config/registry"
+
+// SectionName is this section's name in the configuration key space.
+const SectionName = "eth_blocktest"
+
+// Registration puts this package's configuration section in the registry.
+//
+// The owning package registers its own section, so the struct, the values and the keys come from one
+// place. This section's mapstructure tags already spell the keys its reader resolves, so the registry
+// derives what a node reads rather than restating them.
+func init() {
+	registry.RegisterSection(SectionName, &Config{}, defaults)
+}
+
+// defaults is what this section resolves to for a node that has written nothing.
+//
+// The same values for every mode. This section drives a harness against recorded block data, which is
+// not something any kind of node does while serving a chain.
+//
+// The data path is a tilde path, and it resolves as written. Whoever opens it expands the tilde, so a
+// caller that renders this value into a file writes the same text an operator would.
+func defaults(registry.Mode) any { return DefaultConfig }