diff --git a/index.js b/index.js
index 1f20314..3f2cb51 100644
--- a/index.js
+++ b/index.js
@@ -46,14 +46,40 @@ function hash256(buffer) {
   return sha256(sha256(buffer));
 };
 
+function sha256_3(buffer) {
+  return crypto.createHash('sha3-256').update(buffer).digest();
+};
+
+function hash256_3(buffer) {
+  return sha256_3(sha256_3(buffer));
+};
+
+function transaction_hash(transaction, forWitness) {
+  if (forWitness && transaction.isCoinbase()) return Buffer.alloc(32, 0);
+  return hash256(transaction.__toBuffer(undefined, undefined, forWitness));
+}
+
+function transaction_hash3(transaction, forWitness) {
+  if (forWitness && transaction.isCoinbase()) return Buffer.alloc(32, 0);
+  return hash256_3(transaction.__toBuffer(undefined, undefined, forWitness));
+}
+
 function getMerkleRoot(transactions) {
   if (transactions.length === 0) return Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex')
   const forWitness = txesHaveWitnessCommit(transactions);
-  const hashes = transactions.map(transaction => transaction.getHash(forWitness));
+  const hashes = transactions.map(transaction => transaction_hash(transaction, forWitness));
   const rootHash = fastMerkleRoot(hashes, hash256);
   return forWitness ? hash256(Buffer.concat([rootHash, transactions[0].ins[0].witness[0]])) : rootHash;
 }
 
+function getMerkleRoot3(transactions) {
+  if (transactions.length === 0) return Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex')
+  const forWitness = txesHaveWitnessCommit(transactions);
+  const hashes = transactions.map(transaction => transaction_hash3(transaction, forWitness));
+  const rootHash = fastMerkleRoot(hashes, hash256_3);
+  return forWitness ? hash256_3(Buffer.concat([rootHash, transactions[0].ins[0].witness[0]])) : rootHash;
+}
+
 let last_epoch_number;
 let last_seed_hash;
 
@@ -169,10 +195,26 @@ function update_merkle_root_hash(offset, payload, blob_in, blob_out) {
   getMerkleRoot(transactions).copy(blob_out, 4 + 32);
 };
 
+function update_merkle_root_hash3(offset, payload, blob_in, blob_out) {
+  const nTransactions = varuint.decode(blob_in, offset);
+  offset += varuint.decode.bytes;
+  let transactions = [];
+  for (let i = 0; i < nTransactions; ++i) {
+    const tx = bitcoin.Transaction.fromBuffer(blob_in.slice(offset), true, payload && i == 0);
+    transactions.push(tx);
+    offset += tx.byteLength();
+  }
+  getMerkleRoot3(transactions).copy(blob_out, 4 + 32);
+};
+
 module.exports.blockHashBuff = function(blobBuffer) {
   return reverseBuffer(hash256(blobBuffer));
 };
 
+module.exports.blockHashBuff3 = function(blobBuffer) {
+  return reverseBuffer(hash256_3(blobBuffer));
+};
+
 module.exports.convertRavenBlob = function(blobBuffer) {
   let header = blobBuffer.slice(0, 80);
   update_merkle_root_hash(80 + 8 + 32, false, blobBuffer, header);
@@ -223,7 +265,7 @@ module.exports.convertRtmBlob = function(blobBuffer) {
 
 module.exports.convertKcnBlob = function(blobBuffer) {
   let header = blobBuffer.slice(0, 80);
-  update_merkle_root_hash(80, false, blobBuffer, header);
+  update_merkle_root_hash3(80, false, blobBuffer, header);
   return header;
 };
 
diff --git a/package.json b/package.json
index d587009..3bc0417 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cryptoforknote-util",
-  "version": "15.3.8",
+  "version": "15.3.9",
   "author": {
     "name": "LucasJones",
     "email": "lucasjonesdev@hotmail.co.uk"
diff --git a/rtm.js b/rtm.js
index e2665fb..c15808e 100644
--- a/rtm.js
+++ b/rtm.js
@@ -240,7 +240,7 @@ module.exports.RtmBlockTemplate = function(rpcData, poolAddress) {
 
   const scriptSigPart2 = serializeString('/nodeStratum/');
 
-  const is_witness = rpcData.default_witness_commitment !== undefined;
+  const is_witness = false; //rpcData.default_witness_commitment !== undefined;
 
   const blob1 = Buffer.concat([
     coinbaseVersion,