diff --git a/lib/primitives/tx.js b/lib/primitives/tx.js
index 5882f79e..b6606736 100644
--- a/lib/primitives/tx.js
+++ b/lib/primitives/tx.js
@@ -50,7 +50,7 @@ class TX {
     this.outputs = [];
     this.locktime = 0;
 
-    this.strFloData = "";
+    this.floData = Buffer.alloc(0);
 
     this.mutable = false;
 
@@ -145,7 +145,7 @@ class TX {
     for (const output of tx.outputs)
       this.outputs.push(output.clone());
 
-    this.strFloData = tx.strFloData;
+    this.floData = tx.floData;
 
     this.locktime = tx.locktime;
 
@@ -577,7 +577,7 @@ class TX {
     bw.writeU32(this.locktime);
 
     if (this.version >= 2 && includeFloData) {
-      bw.writeVarBytes(Buffer.from(this.strFloData));
+      bw.writeVarBytes(this.floData);
     }
 
     // Append the hash type.
@@ -629,8 +629,8 @@ class TX {
         break;
     }
 
-    if (includeFloData){
-      let bufferLength = Buffer.from(this.strFloData).length;
+    if (this.version >= 2 && includeFloData){
+      let bufferLength = this.floData.length;
 
       size += encoding.sizeVarint(bufferLength);
       size += bufferLength
@@ -735,7 +735,7 @@ class TX {
 
     // Add the FloData to the transaction
     if (this.version >= 2 && includeFloData) {
-      bw.writeVarBytes(Buffer.from(this.strFloData));
+      bw.writeVarBytes(this.floData);
     }
 
     bw.writeU32(type);
@@ -2157,7 +2157,7 @@ class TX {
       }),
       outputs: this.outputs,
       locktime: this.locktime,
-      floData: this.strFloData
+      floData: this.floData.toString()
     };
   }
 
@@ -2225,7 +2225,7 @@ class TX {
       }),
       locktime: this.locktime,
       hex: this.toRaw().toString('hex'),
-      floData: this.strFloData
+      floData: this.floData
     };
   }
 
@@ -2251,7 +2251,7 @@ class TX {
     for (const output of json.outputs)
       this.outputs.push(Output.fromJSON(output));
 
-    this.strFloData = json.floData
+    this.floData = json.floData
 
     this.locktime = json.locktime;
 
@@ -2336,8 +2336,7 @@ class TX {
     }
 
     if (this.version >= 2){
-      let floDataBuffer = br.readVarBytes();
-      this.strFloData = Buffer.from(floDataBuffer).toString();
+      this.floData = br.readVarBytes();
     }
 
     if (!this.mutable) {
@@ -2408,9 +2407,7 @@ class TX {
 
     this.locktime = br.readU32();
     if (this.version >= 2){
-      var floDataLength = br.readVarint();
-      var floDataBuffer = br.readBytes(floDataLength);
-      this.strFloData = Buffer.from(floDataBuffer).toString();
+      this.floData = br.readVarBytes();
     }
 
     if (block) {
@@ -2484,7 +2481,7 @@ class TX {
     bw.writeU32(this.locktime);
 
     if (this.version >= 2){
-      bw.writeVarBytes(Buffer.from(this.strFloData));
+      bw.writeVarBytes(this.floData);
     }
 
     return bw;
@@ -2526,7 +2523,7 @@ class TX {
     bw.writeU32(this.locktime);
 
     if (this.version >= 2){
-      bw.writeVarBytes(Buffer.from(this.strFloData));
+      bw.writeVarBytes(this.floData);
     }
 
     if (witness === this.inputs.length)
@@ -2557,14 +2554,8 @@ class TX {
       base += output.getSize();
 
     if (this.version >= 2){
-      let bufferLength = Buffer.from(this.strFloData).length;
-
-      if (this.strFloData.length > 0){
-        base += encoding.sizeVarint(bufferLength);
-        base += bufferLength
-      } else {
-        base += encoding.sizeVarint(0);
-      }
+      base += encoding.sizeVarint(this.floData.length);
+      base += this.floData.length
     }
 
     base += 4;
@@ -2598,14 +2589,8 @@ class TX {
       base += output.getSize();
 
     if (this.version >= 2){
-      let bufferLength = Buffer.from(this.strFloData).length;
-
-      if (this.strFloData.length > 0){
-        base += encoding.sizeVarint(bufferLength);
-        base += bufferLength
-      } else {
-        base += encoding.sizeVarint(0);
-      }
+      base += encoding.sizeVarint(this.floData.length);
+      base += this.floData.length
     }
 
     base += 4;