diff --git a/lib/commands/pin-rpc.js b/lib/commands/pin-rpc.js
index d77732ce9..27a8ae28d 100644
--- a/lib/commands/pin-rpc.js
+++ b/lib/commands/pin-rpc.js
@@ -142,23 +142,9 @@ var getFreeSpace = Pinning.getFreeSpace = function (Env, safeKey, cb) {
     });
 };
 
-var hashChannelList = function (A) {
-    var uniques = [];
-
-    A.forEach(function (a) {
-        if (uniques.indexOf(a) === -1) { uniques.push(a); }
-    });
-    uniques.sort();
-
-    var hash = Nacl.util.encodeBase64(Nacl.hash(Nacl
-        .util.decodeUTF8(JSON.stringify(uniques))));
-
-    return hash;
-};
-
 var getHash = Pinning.getHash = function (Env, safeKey, cb) {
     getChannelList(Env, safeKey, function (channels) {
-        cb(void 0, hashChannelList(channels));
+        Env.hashChannelList(channels, cb);
     });
 };
 
diff --git a/lib/hk-util.js b/lib/hk-util.js
index 57e0afe36..799ec547f 100644
--- a/lib/hk-util.js
+++ b/lib/hk-util.js
@@ -951,7 +951,7 @@ HK.initializeValidationWorkers = function (Env) {
         worker.on('message', function (res) {
             if (!res || !res.txid) { return; }
             //console.log(+new Date(), "Received verification response");
-            response.handle(res.txid, [res.error]);
+            response.handle(res.txid, [res.error, res.value]);
         });
         // Spawn a new process in one ends
         worker.on('exit', function () {
@@ -1001,6 +1001,13 @@ HK.initializeValidationWorkers = function (Env) {
             key: publicKey,
         }, cb);
     };
+
+    Env.hashChannelList = function (channels, cb) {
+        send({
+            command: 'HASH_CHANNEL_LIST',
+            channels: channels,
+        }, cb);
+    };
 };
 
 /*  onChannelMessage
diff --git a/lib/workers/check-signature.js b/lib/workers/check-signature.js
index 846f41d3b..5ed58ac7c 100644
--- a/lib/workers/check-signature.js
+++ b/lib/workers/check-signature.js
@@ -73,17 +73,34 @@ COMMANDS.DETACHED = function (data, cb) {
     cb();
 };
 
+COMMANDS.HASH_CHANNEL_LIST = function (data, cb) {
+    var channels = data.channels;
+    if (!Array.isArray(channels)) { return void cb('INVALID_CHANNEL_LIST'); }
+    var uniques = [];
+
+    channels.forEach(function (a) {
+        if (uniques.indexOf(a) === -1) { uniques.push(a); }
+    });
+    uniques.sort();
+
+    var hash = Nacl.util.encodeBase64(Nacl.hash(Nacl
+        .util.decodeUTF8(JSON.stringify(uniques))));
+
+    cb(void 0, hash);
+};
+
 process.on('message', function (data) {
-    if (!data || !data.key || !data.msg || !data.txid) {
+    if (!data || !data.txid) {
         return void process.send({
             error:'E_INVAL'
         });
     }
 
-    const cb = function (err) {
+    const cb = function (err, value) {
         process.send({
             txid: data.txid,
             error: err,
+            value: value,
         });
     };