Stream confirmed on-chain file deliveries into the owned cache

core/archipelago/src/api/rpc/content.rs

@@ -1203,6 +1203,28 @@ impl RpcHandler {
             return Err(anyhow::anyhow!("Invalid address"));
         }
 
+        crate::content_owned::validate_identity(onion, content_id)?;
+        let _purchase_lock = crate::content_owned::lock_seller_purchases(onion).await;
+        let cache_only = params
+            .get("cache_only")
+            .and_then(|v| v.as_bool())
+            .unwrap_or(false);
+        if crate::content_owned::list_owned_checked(&self.config.data_dir)
+            .await?
+            .iter()
+            .any(|item| {
+                item.onion == onion && item.content_id == content_id && item.download_complete
+            })
+        {
+            return cached_purchase_response(
+                &self.config.data_dir,
+                onion,
+                content_id,
+                cache_only,
+                0,
+            )
+            .await;
+        }
         let (data, _) = self.state_manager.get_snapshot().await;
         let local_did = crate::identity::did_key_from_pubkey_hex(&data.server_info.pubkey)?;
         let fips_npub = crate::federation::fips_npub_for_onion(&self.config.data_dir, onion).await;
@@ -1251,16 +1273,38 @@ impl RpcHandler {
             }));
         }
 
-        let bytes = response
-            .bytes()
+        let mime = response
+            .headers()
+            .get(reqwest::header::CONTENT_TYPE)
+            .and_then(|v| v.to_str().ok())
+            .unwrap_or("application/octet-stream")
+            .split(';')
+            .next()
+            .unwrap_or("application/octet-stream")
+            .to_string();
+        let filename = params
+            .get("filename")
+            .and_then(|v| v.as_str())
+            .unwrap_or(content_id);
+        let item = cache_peer_response(
+            &self.config.data_dir,
+            onion,
+            content_id,
+            filename,
+            &mime,
+            params
+                .get("price_sats")
+                .and_then(|v| v.as_u64())
+                .unwrap_or(0),
+            "onchain",
+            response,
+        )
         .await
-            .context("Failed to read response body")?;
-        use base64::Engine;
-        let encoded = base64::engine::general_purpose::STANDARD.encode(&bytes);
-        Ok(serde_json::json!({
-            "data": encoded,
-            "size": bytes.len(),
-        }))
+        .context("Paid file could not be saved; retry delivery without paying again")?;
+        if let Err(error) = file_cached_purchase_in_files(&self.config.data_dir, &item).await {
+            tracing::warn!("On-chain purchase cached; optional Files copy failed: {error:#}");
+        }
+        cached_purchase_response(&self.config.data_dir, onion, content_id, cache_only, 0).await
     }
 
     /// Fetch a preview of paid content from a peer (no payment required).

core/archipelago/src/api/rpc/content_tests.rs

@@ -191,3 +191,34 @@ async fn inline_download_limits_known_and_chunked_bodies_without_draining_them()
     assert!(bounded_content_bytes(response, 4).await.is_err());
     assert_eq!(consumed.load(Ordering::SeqCst), 2);
 }
+
+#[tokio::test]
+async fn onchain_delivery_streams_to_owned_cache_and_preserves_incomplete_recovery() {
+    use tokio::io::AsyncReadExt;
+    let dir = tempfile::tempdir().unwrap();
+    let response: reqwest::Response = hyper::Response::builder()
+        .header("content-length", "2097152")
+        .body(hyper::Body::from(vec![71u8; 2 * 1024 * 1024]))
+        .unwrap()
+        .into();
+    let item = cache_peer_response(dir.path(), "seller.onion", "film", "film.mp4", "video/mp4", 1, "onchain", response).await.unwrap();
+    assert!(item.download_complete);
+    assert_eq!(item.ecash_backend, "onchain");
+    let (_, mut file) = crate::content_owned::open_owned(dir.path(), "seller.onion", "film").await.unwrap().unwrap();
+    let mut bytes = Vec::new();
+    file.read_to_end(&mut bytes).await.unwrap();
+    assert_eq!(bytes, vec![71u8; 2 * 1024 * 1024]);
+    let reply = cached_purchase_response(dir.path(), "seller.onion", "film", true, 0).await.unwrap();
+    assert_eq!(reply["owned"], true);
+    assert!(reply.get("data").is_none());
+
+    let truncated: reqwest::Response = hyper::Response::builder()
+        .header("content-length", "100")
+        .body(hyper::Body::from("short"))
+        .unwrap()
+        .into();
+    assert!(cache_peer_response(dir.path(), "seller.onion", "interrupted", "film.mp4", "video/mp4", 1, "onchain", truncated).await.is_err());
+    let entries = crate::content_owned::list_owned_checked(dir.path()).await.unwrap();
+    assert!(!entries.iter().find(|item| item.content_id == "interrupted").unwrap().download_complete);
+    assert!(existing_paid_content(dir.path(), "seller.onion", "interrupted", None, true).await.is_err());
+}

neode-ui/src/views/PeerFiles.vue

@@ -1288,14 +1288,14 @@ async function pollOnchain(address: string) {
       timeout: 30000,
     })
     if (res?.paid) {
-      const dl = await rpcClient.call<{ data?: string; mime_type?: string; error?: string }>({
+      const dl = await rpcClient.call<{ data?: string; owned?: boolean; owned_content_id?: string; mime_type?: string; error?: string }>({
         method: 'content.download-peer-onchain',
-        params: { onion, content_id: item.id, address },
-        timeout: 120000,
+        params: { onion, content_id: item.id, address, filename: item.filename, price_sats: getItemPrice(item.access), cache_only: true },
+        timeout: 960000,
       })
       onchainPaying.value = false
-      if (dl?.data) {
-        openPurchased(item, dl.data, dl.mime_type)
+      if (dl?.data !== undefined || dl?.owned === true) {
+        openPurchased(item, dl.data, dl.mime_type, onion, dl.owned_content_id)
       } else {
         lnError.value = dl?.error || 'Paid, but the download failed. Try again shortly.'
       }

neode-ui/src/views/__tests__/PeerFilesLightning.test.ts

@@ -30,6 +30,21 @@ beforeEach(() => {
   vi.mocked(rpcClient.payLightningInvoice).mockResolvedValue({ status: 'succeeded' } as never)
 })
 describe('Lightning file delivery recovery', () => {
+  it('opens a confirmed on-chain delivery from HTTP cache without another payment', async () => {
+    vi.mocked(rpcClient.call).mockImplementation(async ({ method }) => {
+      if (method === 'content.onchain-status') return { paid: true }
+      if (method === 'content.download-peer-onchain') return { owned: true, mime_type: 'video/mp4', size_bytes: 200000000 }
+      return { items: [] }
+    })
+    const { wrapper, vm } = await open()
+    await vm.pollOnchain('bc1test')
+    expect(vm.viewerUrl).toBe('/api/peer-content/peer.onion/paid-file')
+    expect(vm.viewerMime).toBe('video/mp4')
+    const calls = vi.mocked(rpcClient.call).mock.calls.map(([call]) => call)
+    expect(calls.find(call => call.method === 'content.download-peer-onchain')?.params).toMatchObject({ cache_only: true, address: 'bc1test', filename: 'bought.txt' })
+    expect(calls.some(call => ['lnd.sendcoins', 'content.request-onchain'].includes(call.method))).toBe(false)
+    wrapper.unmount()
+  })
   it('opens a cached ecash purchase without transferring base64 into the UI', async () => {
     vi.mocked(rpcClient.call).mockImplementation(async ({ method }) => {
       if (method === 'content.download-peer-paid') return { owned: true, mime_type: 'video/mp4', size_bytes: 200000000 }