diff --git a/rpc.js b/rpc.js
index ebc6ae96d..dad806a5b 100644
--- a/rpc.js
+++ b/rpc.js
@@ -11,6 +11,8 @@ var Path = require("path");
 var Https = require("https");
 const Package = require('./package.json');
 const Pinned = require('./pinned');
+const Saferphore = require("saferphore");
+const nThen = require("nthen");
 
 var RPC = module.exports;
 
@@ -355,6 +357,33 @@ var getMultipleFileSize = function (Env, channels, cb) {
     });
 };
 
+/*  accepts a list, and returns a sublist of channel or file ids which seem
+    to have been deleted from the server (file size 0)
+
+    we might consider that we should only say a file is gone if fs.stat returns
+    ENOENT, but for now it's simplest to just rely on getFileSize...
+*/
+var getDeletedPads = function (Env, channels, cb) {
+    if (!Array.isArray(channels)) { return cb('INVALID_LIST'); }
+    var L = channels.length;
+
+    var sem = Saferphore.create(10);
+    var absentees = [];
+    nThen(function (w) {
+        for (var i = 0; i < L; i++) {
+            let channel = channels[i];
+            sem.take(function (give) {
+                getFileSize(Env, channel, w(give(function (e, size) {
+                    if (e) { return; }
+                    if (size === 0) { absentees.push(channel); }
+                })));
+            });
+        }
+    }).nThen(function () {
+        cb(void 0, absentees);
+    });
+};
+
 var getTotalSize = function (Env, publicKey, cb) {
     var bytes = 0;
     return void getChannelList(Env, publicKey, function (channels) {
@@ -1005,7 +1034,8 @@ var isUnauthenticatedCall = function (call) {
         'GET_MULTIPLE_FILE_SIZE',
         'IS_CHANNEL_PINNED',
         'IS_NEW_CHANNEL',
-        'GET_HISTORY_OFFSET'
+        'GET_HISTORY_OFFSET',
+        'GET_DELETED_PADS',
     ].indexOf(call) !== -1;
 };
 
@@ -1128,6 +1158,14 @@ RPC.create = function (config /*:Config_t*/, cb /*:(?Error, ?Function)=>void*/)
                     }
                     respond(e, [null, dict, null]);
                 });
+            case 'GET_DELETED_PADS':
+                return void getDeletedPads(Env, msg[1], function (e, list) {
+                    if (e) {
+                        WARN(e, msg[1]);
+                        return respond(e);
+                    }
+                    respond(e, [null, list, null]);
+                });
             case 'IS_CHANNEL_PINNED':
                 return void isChannelPinned(Env, msg[1], function (isPinned) {
                     respond(null, [null, isPinned, null]);
diff --git a/www/common/outer/async-store.js b/www/common/outer/async-store.js
index d8fb6ef3b..bf8879d6f 100644
--- a/www/common/outer/async-store.js
+++ b/www/common/outer/async-store.js
@@ -211,16 +211,6 @@ define([
         });
     };
 
-    Store.getDeletedPads = function (data, cb) {
-        if (!store.rpc) { return void cb({error: 'RPC_NOT_READY'}); }
-
-        //var list = getCanonicalChannelList(true);
-
-        // TODO: rpc to get the deleted pads here and send this list in the callback
-
-        cb([]);
-    };
-
     Store.uploadComplete = function (data, cb) {
         if (!store.rpc) { return void cb({error: 'RPC_NOT_READY'}); }
         store.rpc.uploadComplete(function (err, res) {
@@ -337,6 +327,24 @@ define([
         });
     };
 
+    Store.getDeletedPads = function (data, cb) {
+        if (!store.anon_rpc) { return void cb({error: 'ANON_RPC_NOT_READY'}); }
+        var list = getCanonicalChannelList(true);
+        if (!Array.isArray(list)) {
+            return void cb({error: 'INVALID_FILE_LIST'});
+        }
+
+        store.anon_rpc.send('GET_DELETED_PADS', list, function (e, res) {
+            console.log(e, res);
+            if (e) { return void cb({error: e}); }
+            if (res && res.length && Array.isArray(res[0])) {
+                cb(res[0]);
+            } else {
+                cb({error: 'UNEXPECTED_RESPONSE'});
+            }
+        });
+    };
+
     Store.initAnonRpc = function (data, cb) {
         require([
             '/common/rpc.js',
@@ -349,8 +357,6 @@ define([
         });
     };
 
-
-
     //////////////////////////////////////////////////////////////////
     /////////////////////// Store ////////////////////////////////////
     //////////////////////////////////////////////////////////////////
diff --git a/www/common/pinpad.js b/www/common/pinpad.js
index 47eb97892..0bbaddd37 100644
--- a/www/common/pinpad.js
+++ b/www/common/pinpad.js
@@ -145,7 +145,22 @@ define([
                     if (response && response.length) {
                         cb(void 0, response[0]);
                     } else {
-                        cb();
+                        cb('INVALID_RESPONSE');
+                    }
+                });
+            };
+
+            exp.removeOwnedChannel = function (channel, cb) {
+                if (typeof(channel) !== 'string' || channel.length !== 32) {
+                    // can't use this on files because files can't be owned...
+                    return void cb('INVALID_ARGUMENTS');
+                }
+                rpc.send('REMOVE_OWNED_CHANNEL', channel, function (e, response) {
+                    if (e) { return void cb(e); }
+                    if (response && response.length) {
+                        cb(void 0, response[0]); // I haven't tested this...
+                    } else {
+                        cb('INVALID_RESPONSE');
                     }
                 });
             };