virwox/lib/trading_api.js

virwox trade api for promise

// notest module
var lp = require('./system').lp;
var CONSTANT = require('./constant');

var createHeader = function(user_agent){
    return {
        'Content-Type': 'application/x-www-form-urlencoded',
        'User-Agent': user_agent,
    };
}
var createPostParam = function(objarray){
    var postparams = {};
    objarray.forEach(function(obj){
        Object.keys(obj).forEach(function(key){ postparams[key] = obj[key]; });
    });
    return postparams;
}
var createPostOption = function(url, user_agent, user, pass, appkey, id, method, params){
    var post = {
        method:method,
        id:id,
        params : createPostParam([{user:user, pass:pass, key:appkey}, params]),
    }
    return {
        url: url,
        method: 'POST',
        form: post,
        headers: createHeader(user_agent),
    };
}

var createTradingApi = exports.createTradingApi = function(user, pass, appkey){
    var query = function(id, method, params){
        return lp.req(
            createPostOption(CONSTANT.VIRWOX_TRADINGAPI_URL,
                CONSTANT.USER_AGENT,
                user, pass, appkey, id,
                method,
                params
            )
        ).then(JSON.parse).then(function(v){
            if(v.error) throw new Error(v.error);
            else return v.result;
        })
    }
    return {
        query : query,
        getBalance : function(){ return query(1, 'getBalance', {}) },
        getCommissionDiscount : function(days){ return query(2, 'getCommissionDiscount', {days:days ? days : 30}) },
        getTransactions : function(opt){
            if(!opt) opt = {};
            return query(3, 'getTransactions', opt)
        },
        getOrders : function(opt){
            if(!opt) opt = {};
            return query(4, 'getOrders', opt)
        },
        placeOrder : function(instrument, orderType, amount, price, estimate){
            return query(5, 'placeOrder', {
                instrument:instrument,
                orderType:orderType,
                amount:amount,
                price:price,
                estimate:estimate,
            })
        },
        cancelOrder : function(orderID){
            if(!opt) opt = {};
            return query(6, 'cancelOrder', {
                orderID:orderID,
            })
        },
    }
}