Identify invalid signature within batch verification (#11582) (#11741)

* Identify invalid signature within batch verification (#11582)

* Fix issues found by linter

* Make deepsource happy

* Add signature description enums

* Make descriptions a mandatory field

* More readable error message of invalid signatures

* Add 'enable-verbose-sig-verification' option

* Fix format

* Move descriptions to package signing

* Add more validation and test cases

* Fix build failure

Co-authored-by: Nishant Das <nishdas93@gmail.com>

config/features/config.go

@@ -72,6 +72,8 @@ type Flags struct {
 
 	DisableStakinContractCheck bool // Disables check for deposit contract when proposing blocks
 
+	EnableVerboseSigVerification bool // EnableVerboseSigVerification specifies whether to verify individual signature if batch verification fails
+
 	// KeystoreImportDebounceInterval specifies the time duration the validator waits to reload new keys if they have
 	// changed on disk. This feature is for advanced use cases only.
 	KeystoreImportDebounceInterval time.Duration
@@ -257,6 +259,10 @@ func ConfigureBeaconChain(ctx *cli.Context) error {
 		logEnabled(enableFullSSZDataLogging)
 		cfg.EnableFullSSZDataLogging = true
 	}
+	if ctx.IsSet(enableVerboseSigVerification.Name) {
+		logEnabled(enableVerboseSigVerification)
+		cfg.EnableVerboseSigVerification = true
+	}
 	Init(cfg)
 	return nil
 }