1 files changed, 4 insertions, 1 deletions
diff --git a/lib/lightning.js b/lib/lightning.js
index c9b41533..7ef62cc9 100644
--- a/lib/lightning.js
+++ b/lib/lightning.js
@@ -15,7 +15,7 @@ export async function listenForLightning() {
     pay_index,
     status,
     msatoshi_received,
-    payment_preimage: preimage,
+    payment_preimage: preimage
   } = event;
 
   await s("pay_index", pay_index);
@@ -31,6 +31,9 @@ export async function listenForLightning() {
     let invoice = await g(`invoice:${hash}`);
     if (!invoice) return warn("received lightning with no invoice", bolt11);
 
+    let payment = await g(`payment:${hash}`);
+    if (payment) return warn("already processed", hash);
+
     await credit(hash, received, invoice.memo, preimage, types.lightning);
   } catch (e) {
     console.log(e);