diff --git a/src/components/pages/NodeFilesPage.vue b/src/components/pages/NodeFilesPage.vue
index 89382f2..daba4fd 100644
--- a/src/components/pages/NodeFilesPage.vue
+++ b/src/components/pages/NodeFilesPage.vue
@@ -68,9 +68,22 @@
                             </div>
 
                             <!-- incoming file transfer offer -->
-                            <div v-if="fileTransfer.direction === 'incoming' && fileTransfer.status === 'offering'" class="flex space-x-1">
-                                <TextButton @click="acceptFileTransfer(fileTransfer)" class="bg-green-500 hover:bg-green-400">Accept</TextButton>
-                                <TextButton @click="rejectFileTransfer(fileTransfer)" class="bg-red-500 hover:bg-red-400">Reject</TextButton>
+                            <div v-if="fileTransfer.direction === 'incoming' && fileTransfer.status === 'offering'">
+                                <div v-if="!isAcceptingFileTransfer(fileTransfer.id)" class="flex space-x-1">
+                                    <TextButton @click="acceptFileTransfer(fileTransfer)" class="bg-green-500 hover:bg-green-400">Accept</TextButton>
+                                    <TextButton @click="rejectFileTransfer(fileTransfer)" class="bg-red-500 hover:bg-red-400">Reject</TextButton>
+                                </div>
+                                <div v-else class="flex text-gray-500 space-x-1">
+                                    <div class="my-auto">
+                                        <svg class="animate-spin size-5" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24">
+                                            <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
+                                            <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
+                                        </svg>
+                                    </div>
+                                    <div class="my-auto">
+                                        Accepting
+                                    </div>
+                                </div>
                             </div>
 
                             <!-- action buttons -->
@@ -149,6 +162,11 @@ export default {
         }
 
     },
+    data() {
+        return {
+            isAcceptingFileTransferIds: [],
+        };
+    },
     methods: {
         hasPublicKey: (nodeId) => NodeUtils.hasPublicKey(nodeId),
         getNodeLongName: (nodeId) => NodeUtils.getNodeLongName(nodeId),
@@ -188,6 +206,20 @@ export default {
             setTimeout(() => URL.revokeObjectURL(objectUrl), 10000);
 
         },
+        isAcceptingFileTransfer(fileTransferId) {
+            return this.isAcceptingFileTransferIds.includes(fileTransferId);
+        },
+        setIsAcceptingFileTransfer(fileTransferId, isAcceptingFileTransfer) {
+            if(isAcceptingFileTransfer){
+                // add to list of ids
+                this.isAcceptingFileTransferIds.push(fileTransferId);
+            } else {
+                // remove from list of ids
+                this.isAcceptingFileTransferIds = this.isAcceptingFileTransferIds.filter((existingFileTransferId) => {
+                    return existingFileTransferId !== fileTransferId;
+                });
+            }
+        },
         async offerFileTransfer() {
 
             // do nothing if file is not selected
@@ -207,9 +239,12 @@ export default {
         },
         async acceptFileTransfer(fileTransfer) {
             try {
+                this.setIsAcceptingFileTransfer(fileTransfer.id, true);
                 await FileTransferrer.acceptFileTransfer(fileTransfer);
             } catch(e) {
                 DialogUtils.showErrorAlert(e);
+            } finally {
+                this.setIsAcceptingFileTransfer(fileTransfer.id, false);
             }
         },
         async rejectFileTransfer(fileTransfer) {
diff --git a/src/js/Connection.js b/src/js/Connection.js
index 1819fc0..e769337 100644
--- a/src/js/Connection.js
+++ b/src/js/Connection.js
@@ -540,6 +540,12 @@ class Connection {
             return;
         }
 
+        // do nothing if file transfer not in offering state
+        if(fileTransfer.status !== FileTransferrer.STATUS_OFFERING){
+            console.log(`[FileTransfer] ${fileTransfer.id} accepted, but no longer in offering state`);
+            return;
+        }
+
         console.log(`[FileTransfer] ${fileTransfer.id} accepted`);
 
         // determine how many parts will be sent
@@ -568,6 +574,12 @@ class Connection {
             return;
         }
 
+        // do nothing if file transfer not in offering state
+        if(fileTransfer.status !== FileTransferrer.STATUS_OFFERING){
+            console.log(`[FileTransfer] ${fileTransfer.id} rejected, but no longer in offering state`);
+            return;
+        }
+
         console.log(`[FileTransfer] ${fileTransfer.id} rejected`);
 
         // update file transfer status
@@ -587,6 +599,12 @@ class Connection {
             return;
         }
 
+        // do nothing if file transfer in completed state
+        if(fileTransfer.status === FileTransferrer.STATUS_COMPLETED){
+            console.log(`[FileTransfer] ${fileTransfer.id} cancelled, but already in completed state`);
+            return;
+        }
+
         console.log(`[FileTransfer] ${fileTransfer.id} cancelled`);
 
         // remove cancelled file transfer if it was in offering state
@@ -633,6 +651,12 @@ class Connection {
             return;
         }
 
+        // do nothing if file transfer not in accepted or receiving state
+        if(fileTransfer.status !== FileTransferrer.STATUS_ACCEPTED && fileTransfer.status !== FileTransferrer.STATUS_RECEIVING){
+            console.log(`[FileTransfer] ${fileTransfer.id} received part ${filePart.partIndex + 1}/${filePart.totalParts}, but not in accepted or receiving state.`);
+            return;
+        }
+
         console.log(`[FileTransfer] ${fileTransfer.id} received part ${filePart.partIndex + 1}/${filePart.totalParts}`);
 
         // cache received data
@@ -673,6 +697,12 @@ class Connection {
             return;
         }
 
+        // do nothing if file transfer not in accepted or sending state
+        if(fileTransfer.status !== FileTransferrer.STATUS_ACCEPTED && fileTransfer.status !== FileTransferrer.STATUS_SENDING){
+            console.log(`[FileTransfer] ${fileTransfer.id} requested file parts ${requestFileParts.partIndexes}, but not in accepted or sending state.`);
+            return;
+        }
+
         console.log(`[FileTransfer] ${fileTransfer.id} requested file parts ${requestFileParts.partIndexes}.`);
 
         // send parts
diff --git a/src/js/FileTransferrer.js b/src/js/FileTransferrer.js
index c2d14d8..fc760a8 100644
--- a/src/js/FileTransferrer.js
+++ b/src/js/FileTransferrer.js
@@ -8,7 +8,6 @@ class FileTransferrer {
     static DIRECTION_OUTGOING = "outgoing";
 
     static STATUS_OFFERING = "offering";
-    static STATUS_OFFERED = "offered";
     static STATUS_ACCEPTED = "accepted";
     static STATUS_REJECTED = "rejected";
     static STATUS_CANCELLED = "cancelled";
@@ -54,7 +53,6 @@ class FileTransferrer {
                 this.log(`offerFileTransfer attempt ${attempt}`);
                 await FileTransferAPI.sendFileTransferRequest(to, fileTransferId, fileName, fileSize);
                 this.log(`offerFileTransfer attempt ${attempt} success`);
-                fileTransfer.status = this.STATUS_OFFERED;
                 return;
             } catch(e) {
                 console.log(e);
@@ -105,7 +103,7 @@ class FileTransferrer {
         for(var attempt = 1; attempt <= this.MAX_PACKET_ATTEMPTS; attempt++){
             try {
                 this.log(`rejectFileTransfer attempt ${attempt}`);
-                await FileTransferAPI.acceptFileTransfer(fileTransfer.from, fileTransfer.id);
+                await FileTransferAPI.rejectFileTransfer(fileTransfer.from, fileTransfer.id);
                 fileTransfer.status = this.STATUS_ACCEPTED;
                 return;
             } catch(e) {
@@ -154,6 +152,9 @@ class FileTransferrer {
             const end = start + partSize;
             const partData = fileTransfer.data.slice(start, end);
 
+            // update status
+            fileTransfer.status = FileTransferrer.STATUS_SENDING;
+
             // send part to remote node
             for(var attempt = 1; attempt <= this.MAX_PACKET_ATTEMPTS; attempt++){
                 try {