ARCHIVE/xahaud
3
0
Fork 0
mirror of https://github.com/Xahau/xahaud.git synced 2025-12-06 17:27:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

JS: Emit orderbook events when trades happen.

Browse Source
This commit is contained in:
Stefan Thomas
2013-03-12 13:59:21 +01:00
parent 0963263f15
commit 7a65dbdcf4
2 changed files with 19 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/js/amount.js
View File

@@ -98,6 +98,8 @@ Amount.prototype.abs = function () {
Amount.prototype.add = function (v) {
var result;
v = Amount.from_json(v);
if (!this.is_comparable(v)) {
result = Amount.NaN();
}
@@ -779,7 +781,7 @@ Amount.prototype.set_issuer = function (issuer) {
// Result in terms of this' currency and issuer.
Amount.prototype.subtract = function (v) {
// Correctness over speed, less code has less bugs, reuse add code.
return this.add(v.negate());
return this.add(Amount.from_json(v).negate());
};
Amount.prototype.to_number = function (allow_nan) {

17
src/js/orderbook.js
View File

@@ -77,7 +77,7 @@ OrderBook.prototype = new EventEmitter;
/**
* List of events that require a remote subscription to the orderbook.
*/
OrderBook.subscribe_events = ['transaction', 'model'];
OrderBook.subscribe_events = ['transaction', 'model', 'trade'];
/**
* Subscribes to orderbook.
@@ -147,6 +147,13 @@ OrderBook.prototype.notifyTx = function (message)
var changed = false;
var trade_gets = Amount.from_json("0" + ((this._currency_gets === 'XRP') ? "" :
"/" + this._currency_gets +
"/" + this._issuer_gets));
var trade_pays = Amount.from_json("0" + ((this._currency_pays === 'XRP') ? "" :
"/" + this._currency_pays +
"/" + this._issuer_pays));
message.mmeta.each(function (an) {
if (an.entryType !== 'Offer') return;
@@ -164,6 +171,13 @@ OrderBook.prototype.notifyTx = function (message)
break;
}
}
trade_gets = trade_gets.add(an.fieldsPrev.TakerGets);
trade_pays = trade_pays.add(an.fieldsPrev.TakerPays);
if (an.diffType === 'ModifiedNode') {
trade_gets = trade_gets.subtract(an.fieldsFinal.TakerGets);
trade_pays = trade_pays.subtract(an.fieldsFinal.TakerPays);
}
} else if (an.diffType === 'CreatedNode') {
var price = Amount.from_json(an.fields.TakerPays).ratio_human(an.fields.TakerGets);
for (i = 0, l = self._offers.length; i < l; i++) {
@@ -187,6 +201,7 @@ OrderBook.prototype.notifyTx = function (message)
if (this._subs) {
this.emit('transaction', message);
if (changed) this.emit('model', this._offers);
if (!trade_gets.is_zero()) this.emit('trade', trade_pays, trade_gets);
}
};