|
1
|
|
|
var _ = require('lodash'); |
|
2
|
|
|
var q = require('q'); |
|
3
|
|
|
var async = require('async'); |
|
4
|
|
|
|
|
5
|
|
|
/** |
|
6
|
|
|
* @param bitcoinDataClient |
|
7
|
|
|
* @param options |
|
8
|
|
|
* @constructor |
|
9
|
|
|
*/ |
|
10
|
|
|
var UnspentOutputFinder = function(bitcoinDataClient, options) { |
|
11
|
|
|
this.defaultSettings = { |
|
12
|
|
|
logging: false, |
|
13
|
|
|
batchChunkSize: 200 |
|
14
|
|
|
}; |
|
15
|
|
|
this.settings = _.merge({}, this.defaultSettings, options); |
|
16
|
|
|
this.dataClient = bitcoinDataClient; |
|
17
|
|
|
}; |
|
18
|
|
|
|
|
19
|
|
|
/** |
|
20
|
|
|
* get unspent outputs for an array of addresses |
|
21
|
|
|
* |
|
22
|
|
|
* @param addresses an array of addresses to find unspent output for |
|
23
|
|
|
* @returns {q.Promise} resolves with an object (associative array) of unspent outputs for each address with a spendable balance |
|
24
|
|
|
*/ |
|
25
|
|
|
UnspentOutputFinder.prototype.getUTXOs = function(addresses) { |
|
26
|
|
|
var self = this; |
|
27
|
|
|
var results = {}; |
|
28
|
|
|
|
|
29
|
|
|
var deferred = q.defer(); |
|
30
|
|
|
|
|
31
|
|
|
//do batch if the bitcoin service supports it... |
|
32
|
|
|
async.eachSeries(_.chunk(addresses, self.settings.batchChunkSize), function(addressBatch, done) { |
|
33
|
|
|
if (self.settings.logging) { |
|
34
|
|
|
console.log("checking batch of " + addressBatch.length + " addresses for UTXOs", addressBatch.join(",")); |
|
|
|
|
|
|
35
|
|
|
} |
|
36
|
|
|
|
|
37
|
|
|
//get the utxos for this address |
|
38
|
|
|
self.dataClient.getBatchUnspentOutputs(addressBatch).done(function(batchResults) { |
|
39
|
|
|
_.each(batchResults, function(utxos, address) { |
|
40
|
|
|
//add the found utxos to the final result |
|
41
|
|
|
if (utxos.length > 0) { |
|
42
|
|
|
results[address] = utxos; |
|
43
|
|
|
} |
|
44
|
|
|
}); |
|
45
|
|
|
//this iteration is complete |
|
46
|
|
|
done(); |
|
47
|
|
|
}, function(err) { |
|
48
|
|
|
done(err); |
|
49
|
|
|
}); |
|
50
|
|
|
|
|
51
|
|
|
}, function(err) { |
|
52
|
|
|
//callback |
|
53
|
|
|
if (err) { |
|
54
|
|
|
//perhaps we should also reject the promise, and stop everything? |
|
55
|
|
|
console.log("error encountered", err); |
|
|
|
|
|
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
|
|
//resolve the promise |
|
59
|
|
|
deferred.resolve(results); |
|
60
|
|
|
}); |
|
61
|
|
|
|
|
62
|
|
|
return deferred.promise; |
|
63
|
|
|
}; |
|
64
|
|
|
|
|
65
|
|
|
module.exports = UnspentOutputFinder; |
|
66
|
|
|
|
blocktrail /
blocktrail-sdk-nodejs
Loading history...