diff --git a/src/core/lib/Bitcoin.mjs b/src/core/lib/Bitcoin.mjs
index c65699d7..89e229e8 100644
--- a/src/core/lib/Bitcoin.mjs
+++ b/src/core/lib/Bitcoin.mjs
@@ -28,7 +28,7 @@ function validateLengths(input, allowableLengths) {
  * Returns true if input is a valid hex string, false otherwise.
  * @param {*} input
  */
-function isHex(input) {
+export function isHex(input) {
     const re = /^[0-9A-Fa-f]{2,}$/g;
     return re.test(input) && input.length %2 === 0;
 }
@@ -467,6 +467,12 @@ export function getExtendedKeyString(input) {
     return versionString[input];
 }
 
+/**
+ * Returns valid versions as an array.
+ */
+export function getVersions() {
+    return Object.keys(versionBytes);
+}
 
 /**
  * We serialize the extended key based off of the passed in data.
diff --git a/src/core/operations/ChangeExtendedKeyVersion.mjs b/src/core/operations/ChangeExtendedKeyVersion.mjs
index 7f367f5d..94561f5d 100644
--- a/src/core/operations/ChangeExtendedKeyVersion.mjs
+++ b/src/core/operations/ChangeExtendedKeyVersion.mjs
@@ -7,7 +7,7 @@
  */
 
 import Operation from "../Operation.mjs";
-import { deserializeExtendedKeyFunc, serializeExtendedKeyFunc, getExtendedKeyVersion } from "../lib/Bitcoin.mjs";
+import { deserializeExtendedKeyFunc, serializeExtendedKeyFunc, getExtendedKeyVersion, getVersions } from "../lib/Bitcoin.mjs";
 
 
 /**
@@ -31,7 +31,8 @@ class ChangeExtendedKeyVersion extends Operation {
             {
                 "name": "Version Type",
                 "type": "option",
-                "value": ["xpub", "xprv", "ypub", "yprv", "zpub", "zprv", "Zpub", "Zprv", "Ypub", "Yprv", "Ltub", "Ltpv", "Mtub", "Mtpv", "ttub", "ttpv", "tpub", "tprv", "upub", "uprv", "vpub", "vprv", "Upub", "Uprv", "Vpub", "Vprv"]
+                "value": getVersions()
+                // "value": ["xpub", "xprv", "ypub", "yprv", "zpub", "zprv", "Zpub", "Zprv", "Ypub", "Yprv", "Ltub", "Ltpv", "Mtub", "Mtpv", "ttub", "ttpv", "tpub", "tprv", "upub", "uprv", "vpub", "vprv", "Upub", "Uprv", "Vpub", "Vprv"]
             }
         ];
         this.checks = [
diff --git a/src/core/operations/KeyToExtendedKey.mjs b/src/core/operations/KeyToExtendedKey.mjs
index b5b168b2..7c6a1f84 100644
--- a/src/core/operations/KeyToExtendedKey.mjs
+++ b/src/core/operations/KeyToExtendedKey.mjs
@@ -6,7 +6,7 @@
 
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
-import { makeSureIsHex,  serializeExtendedKeyFunc, getExtendedKeyVersion } from "../lib/Bitcoin.mjs";
+import { makeSureIsHex,  serializeExtendedKeyFunc, getExtendedKeyVersion, getVersions } from "../lib/Bitcoin.mjs";
 
 
 /**
@@ -36,7 +36,8 @@ class KeyToExtendedKey extends Operation {
             {
                 "name": "Version Type",
                 "type": "option",
-                "value": ["xpub", "xprv", "ypub", "yprv", "zpub", "zprv", "Zpub", "Zprv", "Ypub", "Yprv", "Ltub", "Ltpv", "Mtub", "Mtpv", "ttub", "ttpv", "tpub", "tprv", "upub", "uprv", "vpub", "vprv", "Upub", "Uprv", "Vpub", "Vprv"]
+                "value": getVersions()
+                // "value": ["xpub", "xprv", "ypub", "yprv", "zpub", "zprv", "Zpub", "Zprv", "Ypub", "Yprv", "Ltub", "Ltpv", "Mtub", "Mtpv", "ttub", "ttpv", "tpub", "tprv", "upub", "uprv", "vpub", "vprv", "Upub", "Uprv", "Vpub", "Vprv"]
             }
             /* Example arguments. See the project wiki for full details.
             {
@@ -60,6 +61,10 @@ class KeyToExtendedKey extends Operation {
      */
     run(input, args) {
         // const [firstArg, secondArg] = args;
+        if (input.trim().length === 0) {
+            return "";
+        }
+        input = input.trim();
 
         const inputAsHex = makeSureIsHex(input);
         const isPublic = inputAsHex.length === 66 && (inputAsHex.startsWith("03") || inputAsHex.startsWith("02"));
diff --git a/src/core/operations/SeedToMPK.mjs b/src/core/operations/SeedToMPK.mjs
index 23f6f878..96182674 100644
--- a/src/core/operations/SeedToMPK.mjs
+++ b/src/core/operations/SeedToMPK.mjs
@@ -7,7 +7,7 @@
  */
 
 import Operation from "../Operation.mjs";
-import { serializeExtendedKeyFunc, getExtendedKeyVersion } from "../lib/Bitcoin.mjs";
+import { serializeExtendedKeyFunc, getExtendedKeyVersion, getVersions, isHex } from "../lib/Bitcoin.mjs";
 import forge from "node-forge";
 import Utils from "../Utils.mjs";
 
@@ -33,7 +33,8 @@ class SeedToMPK extends Operation {
             {
                 "name": "Version Type",
                 "type": "option",
-                "value": ["xprv",  "yprv",  "zprv",  "Zprv",  "Yprv",  "Ltpv",  "Mtpv",  "ttpv",  "tprv", "uprv",  "vprv",  "Uprv",  "Vprv"]
+                "value": getVersions()
+                // "value": ["xprv",  "yprv",  "zprv",  "Zprv",  "Yprv",  "Ltpv",  "Mtpv",  "ttpv",  "tprv", "uprv",  "vprv",  "Uprv",  "Vprv"]
             }
         ];
     }
@@ -50,15 +51,11 @@ class SeedToMPK extends Operation {
         input = input.trim();
 
 
-        // We check to see if the input is hex or not.
-        // If it is not, we convert it back to hex
-        const re = /^[0-9A-Fa-f]{2,}$/g;
-        const isHex = re.test(input) && input.length %2 === 0;
-
+        const isItHex = isHex(input);
         // Create the hmac.
         const hmac = forge.hmac.create();
         hmac.start("sha512", Utils.convertToByteString("Bitcoin seed", "UTF8"));
-        if (isHex) {
+        if (isItHex) {
             hmac.update(Utils.convertToByteString(input, "hex"));
         } else {
             hmac.update(input);