Added a utxo cache.
This commit is contained in:
Chris Kleeschulte
parent
95d5441031
commit
bdea9e8517
154
lib/addresses.js
154
lib/addresses.js
@ -6,6 +6,7 @@ var async = require('async');
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var TxController = require('./transactions');
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var Common = require('./common');
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var _ = require('lodash');
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var LRU = require('lru-cache');
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function AddressController(node) {
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this.node = node;
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@ -14,6 +15,14 @@ function AddressController(node) {
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this.txController = new TxController(node);
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this.common = new Common({log: this.node.log});
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this._block = this.node.services.block;
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this._utxoCache = new LRU({
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max: 250,
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maxAge: 1000 * 10
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});
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// limit the size of the request to about 100,000 bytes
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// we'll use 34 bytes as the size of each address.
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this._maxAddresses = Math.floor(100000/34);
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}
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AddressController.prototype.show = function(req, res) {
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@ -142,73 +151,25 @@ AddressController.prototype.check = function(addresses) {
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AddressController.prototype.utxo = function(req, res) {
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var self = this;
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var cachedUtxos = this._utxoCache.get(req.addr);
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if (cachedUtxos) {
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return res.jsonp(cachedUtxos);
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}
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this._address.getAddressUnspentOutputs(req.addr, {}, function(err, utxos) {
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var results;
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if(err) {
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return self.common.handleErrors(err, res);
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} else if (!utxos.length) {
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return res.jsonp([]);
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results = [];
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}
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res.jsonp(utxos.map(self.transformUtxo.bind(self)));
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results = utxos.map(self.transformUtxo.bind(self));
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self._utxoCache.set(req.addr, results);
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res.jsonp(results);
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});
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};
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// this call could take a while to run depending on what addresses are used
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// considering memory constraints, we will streaming out the results for addresses
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// not necessarily in the order we received them
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AddressController.prototype.multiutxo = function(req, res) {
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var self = this;
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var addresses;
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if (_.isArray(req.addrs)) {
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addresses = _.uniq(req.addrs);
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} else {
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addresses = req.addrs.split(',');
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}
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var addressesLeft = addresses.length;
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var startedWriting = false;
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res.write('[');
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var sep = ',';
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async.eachLimit(addresses, 4, function(addr, next) {
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self._address.getAddressUnspentOutputs(addr, {}, function(err, utxos) {
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if (err) {
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return next(err);
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}
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if (addressesLeft-- > 0 && utxos.length > 0 && startedWriting) {
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res.write(sep);
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}
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for(var i = 0; i < utxos.length; i++) {
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startedWriting = true;
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if (utxos.length - 1 === i) {
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sep = '';
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}
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res.write(JSON.stringify(self.transformUtxo(utxos[i])) + sep);
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}
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sep = ',';
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next();
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});
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}, function(err) {
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if (err) {
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return self.common.handleErrors(err, res);
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}
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res.write(']');
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res.end();
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});
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};
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AddressController.prototype.transformUtxo = function(utxoArg) {
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var utxo = {
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address: utxoArg.address,
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@ -238,6 +199,81 @@ AddressController.prototype._getTransformOptions = function(req) {
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};
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};
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// this call could take a while to run depending on what addresses are used
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// considering memory constraints, we will streaming out the results for addresses
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// not necessarily in the order we received them
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AddressController.prototype.multiutxo = function(req, res) {
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var self = this;
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var addresses;
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if (_.isArray(req.addrs)) {
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addresses = _.uniq(req.addrs);
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} else {
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addresses = _.compact(req.addrs.split(','));
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}
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var cacheKey = addresses.join('');
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if (addresses.length > this._maxAddresses) {
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return self.common.handleErrors(new Error('Too many addresses.'), res);
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}
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var cachedUtxos = this._utxoCache.get(cacheKey);
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if (cachedUtxos) {
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return res.jsonp(cachedUtxos);
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}
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var addressesLeft = addresses.length;
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var startedWriting = false;
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var cache = [];
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res.write('[');
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var sep = ',';
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async.eachLimit(addresses, 4, function(addr, next) {
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self._address.getAddressUnspentOutputs(addr, {}, function(err, utxos) {
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if (err) {
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return next(err);
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}
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if (addressesLeft-- > 0 && utxos.length > 0 && startedWriting) {
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res.write(sep);
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}
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for(var i = 0; i < utxos.length; i++) {
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startedWriting = true;
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if (utxos.length - 1 === i) {
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sep = '';
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}
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cache.push(utxos[i]);
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res.write(JSON.stringify(self.transformUtxo(utxos[i])) + sep);
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}
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sep = ',';
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next();
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});
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}, function(err) {
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if (err) {
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return self.common.handleErrors(err, res);
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}
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self._utxoCache.set(cacheKey, cache);
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res.write(']');
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res.end();
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});
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};
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AddressController.prototype.multitxs = function(req, res) {
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var self = this;
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30
package-lock.json
generated
30
package-lock.json
generated
@ -1063,24 +1063,12 @@
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"integrity": "sha1-+t2DS5aDBz2hebPq5tnA0VBT9z4="
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},
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"lru-cache": {
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"version": "4.0.1",
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"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.0.1.tgz",
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"integrity": "sha1-E0OVXtry432bnn7nJB4nxLn7cr4=",
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"version": "4.1.1",
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"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.1.tgz",
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"integrity": "sha512-q4spe4KTfsAS1SUHLO0wz8Qiyf1+vMIAgpRYioFYDMNqKfHQbg+AVDH3i4fvpl71/P1L0dBl+fQi+P37UYf0ew==",
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"requires": {
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"pseudomap": "1.0.2",
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"yallist": "2.0.0"
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},
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"dependencies": {
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"pseudomap": {
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"version": "1.0.2",
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"resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
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"integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM="
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},
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"yallist": {
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"version": "2.0.0",
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"resolved": "https://registry.npmjs.org/yallist/-/yallist-2.0.0.tgz",
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"integrity": "sha1-MGxUODXwnuGkyyO3vOmrNByRzdQ="
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}
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"yallist": "2.1.2"
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}
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},
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"mime-db": {
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@ -1542,6 +1530,11 @@
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}
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}
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},
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"pseudomap": {
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"version": "1.0.2",
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"resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
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"integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM="
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},
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"pump": {
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"version": "1.0.2",
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"resolved": "https://registry.npmjs.org/pump/-/pump-1.0.2.tgz",
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@ -2417,6 +2410,11 @@
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"resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
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"integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
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},
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"yallist": {
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"version": "2.1.2",
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"resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
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"integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
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},
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"yeast": {
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"version": "0.1.2",
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"resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
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@ -36,7 +36,7 @@
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"body-parser": "^1.13.3",
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"compression": "^1.6.1",
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"lodash": "^2.4.1",
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"lru-cache": "^4.0.1",
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"lru-cache": "^4.1.1",
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"morgan": "^1.7.0",
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"request": "^2.64.0"
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},
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