diff --git a/lib/blockchain_util.js b/lib/blockchain_util.js
deleted file mode 100644
index 16eca5fa..00000000
--- a/lib/blockchain_util.js
+++ /dev/null
@@ -1,5 +0,0 @@
-'use strict';
-
-exports.addressReceived = function addressReceived(address, confirmations, cb) {
-  cb();
-};
diff --git a/lib/plugins/zero-conf/blockcypher/blockcypher.js b/lib/plugins/zero-conf/blockcypher/blockcypher.js
index adf1ce58..26b93c13 100644
--- a/lib/plugins/zero-conf/blockcypher/blockcypher.js
+++ b/lib/plugins/zero-conf/blockcypher/blockcypher.js
@@ -4,8 +4,10 @@ const _ = require('lodash/fp')
 
 module.exports = {authorize}
 
-function isHighConfidence (confidence, txref) {
-  return txref.confirmations > 0 || txref.confidence * 100 >= confidence ? txref.value : 0
+function highConfidence (confidence, txref) {
+  if (txref.double_spend) return 0
+  if (txref.confirmations > 0 || txref.confidence * 100 >= confidence) return txref.value
+  return 0
 }
 
 function authorize (account, toAddress, cryptoAtoms, cryptoCode) {
@@ -18,15 +20,14 @@ function authorize (account, toAddress, cryptoAtoms, cryptoCode) {
       includeConfidence: true
     })
 
-    const confidence = account.confidence
+    const confidence = account.confidenceFactor
 
     const url = `https://api.blockcypher.com/v1/btc/main/addrs/${toAddress}?${query}`
 
-    console.log(url)
     return axios.get(url)
     .then(r => {
       const data = r.data
-      const sumTxRefs = txrefs => _.sumBy(txref => isHighConfidence(confidence, txref), txrefs)
+      const sumTxRefs = txrefs => _.sumBy(txref => highConfidence(confidence, txref), txrefs)
 
       const authorizedValue = sumTxRefs(data.txrefs) + sumTxRefs(data.unconfirmed_txrefs)
 
diff --git a/lib/routes.js b/lib/routes.js
index 128d4a96..bec55979 100644
--- a/lib/routes.js
+++ b/lib/routes.js
@@ -197,7 +197,7 @@ function errorHandler (err, req, res, next) {
 
   const json = {error: err.message}
 
-  logger.error(err)
+  if (statusCode >= 400) logger.error(err)
 
   return res.status(statusCode).json(json)
 }