fix: remove cash-in transaction retry

lib/cash-in/cash-in-tx.js

@@ -150,16 +150,15 @@ function postProcess (r, pi, isBlacklisted, addressReuse, walletScore) {
     .catch(err => {
       // Important: We don't know what kind of error this is
       // so not safe to assume that funds weren't sent.
-    // Therefore, don't set sendPending to false except for
-    // errors (like InsufficientFundsError) that are guaranteed
-    // not to send.
-      const sendPending = err.name !== 'InsufficientFundsError'
+
+      // Setting sendPending to true ensures that the transaction gets
+      // silently terminated and no retries are done
 
       return {
         sendTime: 'now()^',
         error: err.message,
         errorCode: err.name,
-        sendPending
+        sendPending: true
       }
     })
     .then(sendRec => {