diff --git a/lib/plugins/zero-conf/blockcypher/blockcypher.js b/lib/plugins/zero-conf/blockcypher/blockcypher.js
index 3b0829ed..7e35e9d7 100644
--- a/lib/plugins/zero-conf/blockcypher/blockcypher.js
+++ b/lib/plugins/zero-conf/blockcypher/blockcypher.js
@@ -13,21 +13,24 @@ function highConfidence (confidence, txref) {
 }
 
 function authorize (account, toAddress, cryptoAtoms, cryptoCode, isBitcoindAvailable) {
-  var promise = []
+  let promise = []
   return Promise.resolve()
     .then(() => {
       if (cryptoCode !== 'BTC') throw new Error('Unsupported crypto: ' + cryptoCode)
+
       const query = qs.stringify({
         token: account.token,
         includeConfidence: true
       })
+
       const confidence = account.confidenceFactor
-      const verifyRBF = account.rbf
+      const isRBFEnabled = account.rbf
       const url = `https://api.blockcypher.com/v1/btc/main/addrs/${toAddress}?${query}`
+
       return axios.get(url)
         .then(r => {
           const data = r.data
-          if (isBitcoindAvailable && verifyRBF && data.unconfirmed_txrefs) {
+          if (isBitcoindAvailable && isRBFEnabled && data.unconfirmed_txrefs) {
             _.map(unconfirmedTxref => {
               promise.push(new Promise((resolve, reject) => { resolve(fetchRBF(unconfirmedTxref.tx_hash)) }))
             }, data.unconfirmed_txrefs)
@@ -49,4 +52,4 @@ function authorize (account, toAddress, cryptoAtoms, cryptoCode, isBitcoindAvail
           }
         })
     })
-}
\ No newline at end of file
+}