refactor: inline one step

lib/plugins.js

@@ -161,20 +161,18 @@ function plugins (settings, deviceId) {
       return _.map(([acc, bill]) => acc + bill.provisioned, _.zip(sum, bills))
     }
 
-    const counts = _.flow(
+    recyclers = _.flow(
+      // Sum "used" bills per recycler
       _.reduce(sumTxs, _.map(_.constant(0), recyclers)),
-      _.zip(_.map('count', recyclers)),
-      _.map(([count, provisioned]) => count - provisioned),
+      _.zip(recyclers),
+      // Remove used bills from recycler counts
+      _.map(([recycler, provisioned]) => _.set('count', recycler.count - provisioned, recycler)),
     )(redeemableTxs)
 
-    if (_.some(_.lt(_, 0), counts)) {
+    if (_.some(({ count }) => count < 0, recyclers))
       throw new Error('Negative note count: %j', counts)
-    }
 
-    return _.map(
-      recycler => _.set('count', counts[recycler.number], recycler),
-      recyclers
-    )
+    return recyclers
   }
 
   function buildAvailableCassettes (excludeTxId) {