minor fixups in cash_in_txs

lib/cash-in-tx.js

@@ -83,6 +83,7 @@ function ensureRatchet (oldField, newField, fieldKey) {
     return true
   }
 
+  if (_.isNil(newField)) return false
   if (oldField.isBigNumber && newField.isBigNumber) return BN(oldField).eq(newField)
   if (oldField.toString() === newField.toString()) return true
 
@@ -231,35 +232,33 @@ function isClearToSend (oldTx, newTx) {
 function postProcess (r, pi) {
   registerTrades(pi, r.newBills)
 
-  if (isClearToSend(r.dbTx, r.tx)) {
-    return pi.sendCoins(r.tx)
-    .then(txHash => ({
-      txHash,
-      sendConfirmed: true,
+  if (!isClearToSend(r.dbTx, r.tx)) return Promise.resolve({})
+
+  return pi.sendCoins(r.tx)
+  .then(txHash => ({
+    txHash,
+    sendConfirmed: true,
+    sendTime: 'now()^',
+    sendPending: false,
+    error: null,
+    errorCode: null
+  }))
+  .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'
+
+    return {
       sendTime: 'now()^',
-      sendPending: false,
-      error: null,
-      errorCode: null
-    }))
-    .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'
-
-      return {
-        sendTime: 'now()^',
-        error: err.message,
-        errorCode: err.name,
-        sendPending
-      }
-    })
-    .then(sendRec => logAction(sendRec, r.tx))
-  }
-
-  return Promise.resolve({})
+      error: err.message,
+      errorCode: err.name,
+      sendPending
+    }
+  })
+  .then(sendRec => logAction(sendRec, r.tx))
 }
 
 function preProcess (dbTx, machineTx, pi) {