diff --git a/domain/consensus/utils/hashes/domains.go b/domain/consensus/utils/hashes/domains.go
index 67f48e507..8cf4148dd 100644
--- a/domain/consensus/utils/hashes/domains.go
+++ b/domain/consensus/utils/hashes/domains.go
@@ -13,6 +13,7 @@ const (
 	transcationSigningECDSADomain = "TransactionSigningHashECDSA"
 	blockDomain                   = "BlockHash"
 	proofOfWorkDomain             = "ProofOfWorkHash"
+	heavyHashDomain               = "HeavyHash"
 	merkleBranchDomain            = "MerkleBranchHash"
 )
 
@@ -73,6 +74,15 @@ func NewPoWHashWriter() HashWriter {
 	return HashWriter{blake}
 }
 
+// NewHeavyHashWriter Returns a new HashWriter used for the HeavyHash function
+func NewHeavyHashWriter() HashWriter {
+	blake, err := blake2b.New256([]byte(heavyHashDomain))
+	if err != nil {
+		panic(errors.Wrapf(err, "this should never happen. %s is less than 64 bytes", heavyHashDomain))
+	}
+	return HashWriter{blake}
+}
+
 // NewMerkleBranchHashWriter Returns a new HashWriter used for a merkle tree branch
 func NewMerkleBranchHashWriter() HashWriter {
 	blake, err := blake2b.New256([]byte(merkleBranchDomain))