Check BIC before sending a candidacy announcement to avoid blocking t…

…he accounts

components/validator/issuer.go

@@ -9,7 +9,10 @@ import (
 	"github.com/iotaledger/iota.go/v4/builder"
 )
 
-var ErrBlockTooRecent = ierrors.New("block is too recent compared to latest commitment")
+var (
+	ErrBlockTooRecent                = ierrors.New("block is too recent compared to latest commitment")
+	ErrNotEnoughBlockIssuanceCredits = ierrors.New("not enough block issuance credits")
+)
 
 type TaskType uint8
 
@@ -154,6 +157,20 @@ func issueCandidateBlock(ctx context.Context, blockIssuingTime time.Time, curren
 		return ierrors.Wrap(err, "error creating block")
 	}
 
+	nodeClient, err := deps.NodeBridge.INXNodeClient()
+	if err != nil {
+		return ierrors.Wrap(err, "error getting node client")
+	}
+
+	congestionResp, err := nodeClient.Congestion(ctx, validatorAccount.ID().ToAddress().(*iotago.AccountAddress), 0, addressableCommitment.MustID())
+	if err != nil {
+		return ierrors.Wrap(err, "error getting congestion")
+	}
+
+	if congestionResp.BlockIssuanceCredits < 0 || iotago.Mana(congestionResp.BlockIssuanceCredits) < candidacyBlock.Body.(*iotago.BasicBlockBody).MaxBurnedMana {
+		return ierrors.WithMessagef(ErrNotEnoughBlockIssuanceCredits, "account BIC %d is not enough to send candidacy announcement with MaxBurnedMana %d", congestionResp.BlockIssuanceCredits, candidacyBlock.Body.(*iotago.BasicBlockBody).MaxBurnedMana)
+	}
+
 	blockID, err := submitBlock(ctx, candidacyBlock)
 	if err != nil {
 		return ierrors.Wrap(err, "error issuing candidacy announcement block")