Merge pull request #1636 from RafaelTaranto/feat/mempool-space-fees

LAM-1012 feat: mempool.space fee estimation

lib/blockexplorers/mempool.space.js

@@ -0,0 +1,8 @@
+const axios = require("axios");
+
+const getEstimateFeeBtc = () => {
+  return axios.get('https://mempool.space/api/v1/fees/recommended')
+    .then(r => r.data.hourFee)
+}
+
+module.exports = { getEstimateFeeBtc }

lib/plugins/wallet/bitcoind/bitcoind.js

@@ -1,5 +1,6 @@
 const _ = require('lodash/fp')
 const jsonRpc = require('../../common/json-rpc')
+const { getEstimateFeeBtc } = require('../../../blockexplorers/mempool.space')
 
 const BN = require('../../../bn')
 const E = require('../../../error')
@@ -55,9 +56,11 @@ function balance (account, cryptoCode, settings, operatorId) {
 }
 
 function estimateFee () {
-  return fetch('estimatesmartfee', [6, 'unset'])
-    .then(result => BN(result.feerate))
-    .catch(() => {})
+  return getEstimateFeeBtc()
+    .then(result => BN(result))
+    .catch(err => {
+      logger.error('failure estimating fes', err)
+    })
 }
 
 function calculateFeeDiscount (feeMultiplier) {