check empty ids before querying validator set contract

consensus/bor/heimdall/span/spanner.go

@@ -111,7 +111,7 @@ func (c *ChainSpanner) GetCurrentValidatorsByBlockNrOrHash(ctx context.Context,
 	return valz, nil
 }
 
-// Try to get bor validators with Id from ValidatorSet contract by querying each element on mapping(uint256 => Validator[]) public producers
+// tryGetBorValidatorsWithId Try to get bor validators with Id from ValidatorSet contract by querying each element on mapping(uint256 => Validator[]) public producers
 // If fails then returns GetBorValidators without id
 func (c *ChainSpanner) tryGetBorValidatorsWithId(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash, blockNumber uint64, toAddress common.Address, gas hexutil.Uint64) ([]*valset.Validator, error) {
 	firstEndBlock, err := c.getFirstEndBlock(ctx, blockNrOrHash, toAddress, gas)

consensus/bor/snapshot.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 
 	"github.com/ethereum/go-ethereum/consensus/bor/valset"
+	"github.com/ethereum/go-ethereum/log"
 
 	lru "github.com/hashicorp/golang-lru"
 
@@ -159,8 +160,11 @@ func (s *Snapshot) apply(headers []*types.Header, c *Bor) (*Snapshot, error) {
 			v := getUpdatedValidatorSet(snap.ValidatorSet.Copy(), newVals)
 			v.IncrementProposerPriority(1)
 
+			if v.CheckEmptyId() {
+				log.Warn("Empty id found on validator set. Querying on the validatorSet contract")
 				valsWithId, _ := c.spanner.GetCurrentValidatorsByHash(context.Background(), header.Hash(), header.Number.Uint64())
 				v.IncludeIds(valsWithId)
+			}
 			snap.ValidatorSet = v
 		}
 	}

consensus/bor/valset/validator_set.go

@@ -128,6 +128,18 @@ func (vals *ValidatorSet) IncludeIds(valsWithId []*Validator) {
 	}
 }
 
+// CheckEmptyId checks if any validator in the ValidatorSet has an empty ID (ID == 0).
+// Returns true if at least one validator has an empty ID.
+// Returns false if all validators have non-zero IDs or if the ValidatorSet is empty.
+func (vals *ValidatorSet) CheckEmptyId() bool {
+	for _, val := range vals.Validators {
+		if val.ID == 0 {
+			return true
+		}
+	}
+	return false
+}
+
 func (vals *ValidatorSet) RescalePriorities(diffMax int64) {
 	if vals.IsNilOrEmpty() {
 		panic("empty validator set")

consensus/bor/valset/validator_set_test.go

@@ -257,3 +257,59 @@ func TestValidatorSet_IncludeIds_EmptySet(t *testing.T) {
 
 	assert.Equal(t, 0, valSet.Size(), "ValidatorSet remains empty")
 }
+
+func TestCheckEmptyId(t *testing.T) {
+	tests := []struct {
+		name         string
+		validatorSet ValidatorSet
+		expected     bool
+	}{
+		{
+			name:         "Empty ValidatorSet",
+			validatorSet: ValidatorSet{Validators: []*Validator{}},
+			expected:     false,
+		},
+		{
+			name: "All Validators with Non-Zero IDs",
+			validatorSet: ValidatorSet{
+				Validators: []*Validator{
+					{ID: 1},
+					{ID: 2},
+					{ID: 3},
+				},
+			},
+			expected: false,
+		},
+		{
+			name: "One Validator with ID Zero",
+			validatorSet: ValidatorSet{
+				Validators: []*Validator{
+					{ID: 0},
+					{ID: 2},
+					{ID: 3},
+				},
+			},
+			expected: true,
+		},
+		{
+			name: "All Validators with ID Zero",
+			validatorSet: ValidatorSet{
+				Validators: []*Validator{
+					{ID: 0},
+					{ID: 0},
+					{ID: 0},
+				},
+			},
+			expected: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.validatorSet.CheckEmptyId()
+			if result != tt.expected {
+				t.Errorf("expected %v, got %v", tt.expected, result)
+			}
+		})
+	}
+}