package com.xcong.excoin.modules.okxNewPrice.utils;
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import cn.hutool.core.util.StrUtil;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import java.math.BigDecimal;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.Random;
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/**
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* @author Administrator
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*/
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public class WsParamBuild {
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public static String getOrderNum(String prefix) {
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SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
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String dd=df.format(new Date());
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if (StrUtil.isNotBlank(prefix)) {
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return prefix+dd+getRandomNum(5);
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}
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return dd+getRandomNum(5);
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}
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public static String getRandomNum(int length) {
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String str = "0123456789";
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Random random = new Random();
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < length; ++i) {
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int number = random.nextInt(str.length());
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sb.append(str.charAt(number));
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}
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return sb.toString();
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}
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public static JSONObject buildJsonObject(String connId, String option, JSONArray argsArray) {
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JSONObject jsonObject = new JSONObject();
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if (StrUtil.isNotEmpty(connId)){
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jsonObject.put("id", connId);
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}
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jsonObject.put("op", option);
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jsonObject.put("args", argsArray);
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return jsonObject;
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}
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/**
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* 计算购买合约的数量
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*
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* USDT 币本位合约
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* 公式：张数 = 保证金 / (面值 * 标记价格 / 杠杆倍数)
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*
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* @param margin 用户的保证金金额
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* @param leverage 杠杆倍数
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* @param faceValue 合约面值
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* @param markPrice 标记价格
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* @param minLotSz 最小下单精度
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* @return 返回用户可以购买的合约数量
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*/
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public static BigDecimal buyCnt(BigDecimal margin, BigDecimal leverage, BigDecimal faceValue, BigDecimal markPrice, int minLotSz) {
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if (margin.compareTo(BigDecimal.ZERO) <= 0 ||
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leverage.compareTo(BigDecimal.ZERO) <= 0 ||
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faceValue.compareTo(BigDecimal.ZERO) <= 0 ||
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markPrice.compareTo(BigDecimal.ZERO) <= 0) {
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return BigDecimal.ZERO;
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}
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BigDecimal divisor = markPrice.divide(leverage, 10, BigDecimal.ROUND_DOWN);
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BigDecimal denominator = faceValue.multiply(divisor);
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return margin.divide(denominator, minLotSz, BigDecimal.ROUND_DOWN);
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}
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}
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