rebuild config index after loading dynamic config

config/params/config_utils_develop.go

@@ -26,6 +26,15 @@ func BeaconConfig() *BeaconChainConfig {
 func OverrideBeaconConfig(c *BeaconChainConfig) {
 	beaconConfigLock.Lock()
 	defer beaconConfigLock.Unlock()
+	c.InitializeForkSchedule()
+	name, ok := reverseConfigNames[c.ConfigName]
+	// if name collides with an existing config name, override it, because the fork versions probably conflict
+	if !ok {
+		// otherwise define it as the special "Dynamic" name, ie for a config loaded from a file at runtime
+		name = Dynamic
+	}
+	KnownConfigs[name] = func() *BeaconChainConfig { return c }
+	rebuildKnownForkVersions()
 	beaconConfig = c
 }
 

config/params/config_utils_prod.go

@@ -19,6 +19,15 @@ func BeaconConfig() *BeaconChainConfig {
 // OverrideBeaconConfig(c). Any subsequent calls to params.BeaconConfig() will
 // return this new configuration.
 func OverrideBeaconConfig(c *BeaconChainConfig) {
+	c.InitializeForkSchedule()
+	name, ok := reverseConfigNames[c.ConfigName]
+	// if name collides with an existing config name, override it, because the fork versions probably conflict
+	if !ok {
+		// otherwise define it as the special "Dynamic" name, ie for a config loaded from a file at runtime
+		name = Dynamic
+	}
+	KnownConfigs[name] = func() *BeaconChainConfig { return c }
+	rebuildKnownForkVersions()
 	beaconConfig = c
 }
 

config/params/loader.go

@@ -70,7 +70,6 @@ func LoadChainConfigFile(chainConfigFileName string, conf *BeaconChainConfig) {
 	// recompute SqrRootSlotsPerEpoch constant to handle non-standard values of SlotsPerEpoch
 	conf.SqrRootSlotsPerEpoch = types.Slot(math.IntegerSquareRoot(uint64(conf.SlotsPerEpoch)))
 	log.Debugf("Config file values: %+v", conf)
-	conf.InitializeForkSchedule()
 	OverrideBeaconConfig(conf)
 }
 

config/params/values.go

@@ -15,6 +15,7 @@ const (
 	Pyrmont
 	Prater
 	EndToEndMainnet
+	Dynamic
 )
 
 // ConfigName enum describes the type of known network in use.
@@ -36,7 +37,9 @@ var ConfigNames = map[ConfigName]string{
 	Pyrmont:         "pyrmont",
 	Prater:          "prater",
 	EndToEndMainnet: "end-to-end-mainnet",
+	Dynamic:         "dynamic",
 }
+var reverseConfigNames map[string]ConfigName
 
 // KnownConfigs provides an index of all known BeaconChainConfig values.
 var KnownConfigs = map[ConfigName]func() *BeaconChainConfig{
@@ -63,6 +66,18 @@ func ConfigForVersion(version [fieldparams.VersionLength]byte) (*BeaconChainConf
 }
 
 func init() {
+	rebuildKnownForkVersions()
+	buildReverseConfigName()
+}
+
+func buildReverseConfigName() {
+	reverseConfigNames = make(map[string]ConfigName)
+	for cn, s := range ConfigNames {
+		reverseConfigNames[s] = cn
+	}
+}
+
+func rebuildKnownForkVersions() {
 	knownForkVersions = make(map[[fieldparams.VersionLength]byte]ConfigName)
 	for n, cfunc := range KnownConfigs {
 		cfg := cfunc()