consensus: allow validator error to print validator address

consensus/parlia/parlia.go

@@ -144,7 +144,9 @@ var (
 	errBlockHashInconsistent = errors.New("the block hash is inconsistent")
 
 	// errUnauthorizedValidator is returned if a header is signed by a non-authorized entity.
-	errUnauthorizedValidator = errors.New("unauthorized validator")
+	errUnauthorizedValidator = func(val string) error {
+		return errors.New("unauthorized validator: " + val)
+	}
 
 	// errCoinBaseMisMatch is returned if a header's coinbase do not match with signature
 	errCoinBaseMisMatch = errors.New("coinbase do not match with signature")
@@ -752,7 +754,7 @@ func (p *Parlia) verifySeal(chain consensus.ChainHeaderReader, header *types.Hea
 	}
 
 	if _, ok := snap.Validators[signer]; !ok {
-		return errUnauthorizedValidator
+		return errUnauthorizedValidator(signer.String())
 	}
 
 	if snap.SignRecently(signer) {
@@ -1298,7 +1300,7 @@ func (p *Parlia) Seal(chain consensus.ChainHeaderReader, block *types.Block, res
 
 	// Bail out if we're unauthorized to sign a block
 	if _, authorized := snap.Validators[val]; !authorized {
-		return errUnauthorizedValidator
+		return errUnauthorizedValidator(val.Hex())
 	}
 
 	// If we're amongst the recent signers, wait for the next block
@@ -1408,7 +1410,7 @@ func (p *Parlia) SignRecently(chain consensus.ChainReader, parent *types.Block)
 
 	// Bail out if we're unauthorized to sign a block
 	if _, authorized := snap.Validators[p.val]; !authorized {
-		return true, errUnauthorizedValidator
+		return true, errUnauthorizedValidator(p.val.String())
 	}
 
 	return snap.SignRecently(p.val), nil

consensus/parlia/snapshot.go

@@ -256,7 +256,7 @@ func (s *Snapshot) apply(headers []*types.Header, chain consensus.ChainHeaderRea
 			return nil, err
 		}
 		if _, ok := snap.Validators[validator]; !ok {
-			return nil, errUnauthorizedValidator
+			return nil, errUnauthorizedValidator(validator.String())
 		}
 		for _, recent := range snap.Recents {
 			if recent == validator {

core/rawdb/freezer.go

@@ -597,5 +597,5 @@ func gcKvStore(db ethdb.KeyValueStore, ancients []common.Hash, first uint64, fro
 	if n := len(ancients); n > 0 {
 		context = append(context, []interface{}{"hash", ancients[n-1]}...)
 	}
-	log.Debug("Deep froze chain segment", context...)
+	log.Info("Deep froze chain segment", context...)
 }