From d2ae088d8eb76912658123286a1f3fc42d504877 Mon Sep 17 00:00:00 2001
From: Chris Kleeschulte <chrisk@bitpay.com>
Date: Mon, 13 Nov 2017 14:13:22 -0500
Subject: [PATCH] Removed utxo cache and removed max addresses limiting.

---
 lib/addresses.js | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/lib/addresses.js b/lib/addresses.js
index 854a718..17c42e7 100644
--- a/lib/addresses.js
+++ b/lib/addresses.js
@@ -6,7 +6,6 @@ var async = require('async');
 var TxController = require('./transactions');
 var Common = require('./common');
 var _ = require('lodash');
-var LRU = require('lru-cache');
 
 function AddressController(node) {
   this.node = node;
@@ -15,14 +14,6 @@ function AddressController(node) {
   this.txController = new TxController(node);
   this.common = new Common({log: this.node.log});
   this._block = this.node.services.block;
-  this._utxoCache = new LRU({
-    max: 250,
-    maxAge: 1000 * 10
-  });
-  // limit the size of the request to about 100,000 bytes
-  // we'll use 34 bytes as the size of each address.
-  this._maxAddresses = Math.floor(100000/34);
-
 }
 
 AddressController.prototype.show = function(req, res) {
@@ -151,12 +142,6 @@ AddressController.prototype.check = function(addresses) {
 AddressController.prototype.utxo = function(req, res) {
   var self = this;
 
-  var cachedUtxos = this._utxoCache.get(req.addr);
-
-  if (cachedUtxos) {
-    return res.jsonp(cachedUtxos);
-  }
-
   this._address.getAddressUnspentOutputs(req.addr, {}, function(err, utxos) {
     var results;
     if(err) {
@@ -165,7 +150,6 @@ AddressController.prototype.utxo = function(req, res) {
       results = [];
     }
     results = utxos.map(self.transformUtxo.bind(self));
-    self._utxoCache.set(req.addr, results);
     res.jsonp(results);
   });
 };
@@ -214,18 +198,6 @@ AddressController.prototype.multiutxo = function(req, res) {
     addresses = _.compact(req.addrs.split(','));
   }
 
-  var cacheKey  = addresses.join('');
-
-  if (addresses.length > this._maxAddresses) {
-    return self.common.handleErrors(new Error('Too many addresses.'), res);
-  }
-
-  var cachedUtxos = this._utxoCache.get(cacheKey);
-
-  if (cachedUtxos) {
-    return res.jsonp(cachedUtxos);
-  }
-
   var addressesLeft = addresses.length;
   var startedWriting = false;
   var cache = [];
@@ -266,8 +238,6 @@ AddressController.prototype.multiutxo = function(req, res) {
         return self.common.handleErrors(err, res);
       }
 
-      self._utxoCache.set(cacheKey, cache);
-
       res.write(']');
       res.end();
   });