Java比特幣開發教程：在開放式交易所限價買賣比特幣

時間  2019-12-05
標籤 java 比特 開發 教程 開放 交易所 限價 買賣 欄目 Java 简体版
原文   原文鏈接

上一章介紹了Exincore，你能夠1秒完成資產的市價買賣。若是你想限訂價格買賣，或者買賣一些exincore不支持的資產，你須要OceanOne。java

方案二: 掛單Ocean.One交易所

Ocean.one是基於Mixin Network的去中心化交易所，它中心化交易所同樣友好。 你能夠在OceanOne上交易任何資產，只須要將你的幣轉給OceanOne, 將交易信息寫在交易的memo裏，OceanOne會在市場裏列出你的交易需求， 交易成功後，會將目標幣轉入到你的MixinNetwork賬上，它有三大特色與優點：git

  • 不須要在OceanOne註冊
  • 不須要存幣到交易所
  • 支持全部Mixin Network上可以轉帳的資產，全部的ERC20 EOS代幣。

預備知識:

你先須要建立一個機器人, 方法在 教程一.github

安裝依賴包

正如教程一里咱們介紹過的， 咱們須要依賴 mixin-java-sdk, 你應該先安裝過它了，zhang/mixin_labs-java-bot/blob/master/README.md).json

Install required packages

第四課, 在上一課中已經安裝好了.api

充幣到 Mixin Network, 並讀出它的餘額.

此處演示用 USDT購買BTC 或者 用BTC購買USDT。交易前，先檢查一下錢包地址。 完整的步驟以下:bash

  • 檢查比特幣或USDT的餘額，錢包地址。並記下錢包地址。
  • 從第三方交易所或者你的冷錢包中，將幣充到上述錢包地址。
  • 再檢查一下幣的餘額，看到賬與否。(比特幣的到賬時間是5個區塊的高度，約100分鐘)。

比特幣與USDT的充值地址是同樣的。ide

private static final String BTC_ASSET_ID     = "c6d0c728-2624-429b-8e0d-d9d19b6592fa";
  private static final String EOS_ASSET_ID     = "6cfe566e-4aad-470b-8c9a-2fd35b49c68d";
  private static final String USDT_ASSET_ID    = "815b0b1a-2764-3736-8faa-42d694fa620a";

  MixinAPI mixinApiUser = generateAPI_FromCSV();
  JsonObject asset = mixinApiUser.getAsset(BTC_ASSET_ID);
  System.out.println(asset);
  System.out.println("------------------------BTC------Information---------------------------");
  System.out.println("The BTC wallet address is " + asset.get("public_key").getAsString());
  System.out.println("The BTC wallet balance is " + asset.get("balance").getAsString());
  System.out.println("-----------------------------------------------------------------------");
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取得Ocean.one的市場價格信息

如何來查詢Ocean.one市場的價格信息呢？你要先了解你交易的基礎幣是什麼，若是你想買比特幣，賣出USDT,那麼基礎貨幣就是USDT;若是你想買USDT,賣出比特幣，那麼基礎貨幣就是比特幣.學習

if ( subinput.equals("1") ) {
  FetchOceanMarketInfos(BTC_ASSET_ID,USDT_ASSET_ID);
}
private static void FetchOceanMarketInfos(String targetAssetID, String baseAssetID) {
  OkHttpClient client = new OkHttpClient();
  String baseUrl = "https://events.ocean.one/markets/%s-%s/book ";
  String fullUrl = String.format(baseUrl,targetAssetID,baseAssetID);
  // String fullUrl = baseUrl + url;
  System.out.println(fullUrl);
  Request request = new Request.Builder()
                             .url(fullUrl)
                             .build();
  try {
     Response response = client.newCall(request).execute();
     if (!response.isSuccessful()) {
       throw new IOException("Unexpected code " + response);
     }
     String res = response.body().string();
     // System.out.println(res);
     JsonParser parser = new JsonParser();
     JsonElement jsonTree = parser.parse(res);
     JsonObject orders;
     orders =  jsonTree.getAsJsonObject();
     JsonArray asksOrders = orders.get("data").getAsJsonObject().
                                   get("data").getAsJsonObject().
                                   get("asks").getAsJsonArray();
     JsonArray bidsOrders = orders.get("data").getAsJsonObject().
                                   get("data").getAsJsonObject().
                                   get("bids").getAsJsonArray();
     // System.out.println(orders.get("data").getAsJsonObject().get("data").getAsJsonObject().get("bids").getAsJsonArray());
     System.out.println("--Side--Price--Amount--Funds---");
     asksOrders.forEach((element) ->  {
        JsonObject jsonObj = element.getAsJsonObject();
        System.out.println(jsonObj.get("side").getAsString() + " " +
                           jsonObj.get("price").getAsString() + " " +
                           jsonObj.get("amount").getAsString() + " " +
                           jsonObj.get("funds").getAsString() );
     });
     bidsOrders.forEach((element) ->  {
        JsonObject jsonObj = element.getAsJsonObject();
        System.out.println(jsonObj.get("side").getAsString() + " " +
                           jsonObj.get("price").getAsString() + " " +
                           jsonObj.get("amount").getAsString() + " " +
                           jsonObj.get("funds").getAsString() );
     });
     System.out.println("----endo--of--btc/usdt----");
     return;
   } catch(Exception e) { e.printStackTrace(); }
   return;
}
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交易前，建立一個Memo!

在第二章裏,基於Mixin Network的 Java 比特幣開發教程: 機器人接受比特幣並當即退還用戶, 咱們學習過轉賬，這兒咱們介紹如何告訴Ocean.one，咱們給它轉賬的目的是什麼，信息所有放在memo裏.gradle

  • Side 方向,"B" 或者 "A", "B"是購買, "A"是出售.
  • AssetUUID 目標虛擬資產的UUID.
  • Price 價格，若是操做方向是"B", 價格就是AssetUUID的價格; 若是操做方向是"B", 價格就是轉給Ocean.one幣的價格.
public static String GenerateOrderMemo(String Side, String AssetUUID, String Price) {
  try {
    MessageBufferPacker m = MessagePack.newDefaultBufferPacker();
    UUID myAssetUUID  =  UUID.fromString(AssetUUID);
    Value map = ValueFactory.newMap(ValueFactory.newString("S"), ValueFactory.newString(Side),
                                    ValueFactory.newString("A"), ValueFactory.newBinary(asBytes(myAssetUUID)),
                                    ValueFactory.newString("P"), ValueFactory.newString(Price),
                                    ValueFactory.newString("T"), ValueFactory.newString("L") );
    m.packValue(map);
    return Base64.getEncoder().encodeToString(m.toByteArray());
  } catch (Exception e) { e.printStackTrace(); }
    return "";
}
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出售BTC的例子

轉打算出售的BTC給Ocean.one(OCEANONE_BOT),將你打算換回來的目標虛擬資產的UUID放入memo.ui

private static final String OCEANONE_BOT     = "aaff5bef-42fb-4c9f-90e0-29f69176b7d4";
private static final String BTC_ASSET_ID     = "c6d0c728-2624-429b-8e0d-d9d19b6592fa";
private static final String EOS_ASSET_ID     = "6cfe566e-4aad-470b-8c9a-2fd35b49c68d";
private static final String USDT_ASSET_ID    = "815b0b1a-2764-3736-8faa-42d694fa620a";
private static final String BTC_WALLET_ADDR  = "14T129GTbXXPGXXvZzVaNLRFPeHXD1C25C";
private static final String MASTER_UUID      = "0b4f49dc-8fb4-4539-9a89-fb3afc613747";

if ( subinput.equals("s1") ) {
  System.out.print("Please input the BTC price base USDT: ");
  String pinput = System.console().readLine();
  System.out.println(pinput);

  System.out.print("Please input the BTC amount: ");
  String aminput = System.console().readLine();
  System.out.println(aminput);
  float amountf = Float.valueOf(aminput.trim()).floatValue();

  String buyMemo = GenerateOrderMemo("A",USDT_ASSET_ID,pinput);
  MixinAPI mixinApiUser = generateAPI_FromCSV();
  // UUID usdtUUID = UUID.fromString(USDT_ASSET_ID);
  // String memoTarget = encodeUUID(usdtUUID);
  System.out.println("------------------Ocean.one-USDT-BTC-EXCHANGE----------------------------");
  System.out.println(buyMemo);
  JsonObject asset = mixinApiUser.getAsset(BTC_ASSET_ID);
  System.out.println(asset);
  System.out.println(asset.get("balance").getAsFloat());
  if ( asset.get("balance").getAsFloat()  > 0 && asset.get("balance").getAsFloat() >= amountf ) {
      JsonObject transInfo = mixinApiUser.transfer(BTC_ASSET_ID, OCEANONE_BOT,
                                                 aminput,
                                                 buyMemo);
      System.out.println("------------------------BTC Transfer To EXCHANGE Information----------------------");
      System.out.println(transInfo);
      System.out.println("-----------------------------------------------------------------------");
   } else System.out.println("----------------Not enough BTC--------------------------------------------");
}
複製代碼

若是你是打算買BTC,操做以下:

if ( subinput.equals("b1") ) {
  System.out.print("Please input the BTC price base USDT: ");
  String pinput = System.console().readLine();
  System.out.println(pinput);

  System.out.print("Please input the USDT amount: ");
  String aminput = System.console().readLine();
  System.out.println(aminput);
  float amountf = Float.valueOf(aminput.trim()).floatValue();
  String buyMemo = GenerateOrderMemo("B",BTC_ASSET_ID,pinput);
  MixinAPI mixinApiUser = generateAPI_FromCSV();
  // UUID usdtUUID = UUID.fromString(USDT_ASSET_ID);
  // String memoTarget = encodeUUID(usdtUUID);
  System.out.println("------------------Ocean.one-USDT-BTC-EXCHANGE----------------------------");
  System.out.println(buyMemo);
  JsonObject asset = mixinApiUser.getAsset(USDT_ASSET_ID);
  System.out.println(asset);
  System.out.println(asset.get("balance").getAsFloat());
  if ( asset.get("balance").getAsFloat()  >= 1 && asset.get("balance").getAsFloat() >= amountf ) {
      JsonObject transInfo = mixinApiUser.transfer(USDT_ASSET_ID, OCEANONE_BOT,
                                                 aminput,
                                                 buyMemo);
      System.out.println("------------------------BTC Transfer To EXCHANGE Information----------------------");
      System.out.println(transInfo);
      System.out.println("-----------------------------------------------------------------------");
   } else System.out.println("----------------Not enough USDT--------------------------------------------");
}
複製代碼

一個成功的掛單以下：

------------------Ocean.one--EXCHANGE----------------------------
hKFToUKhQcQQyUrIj0ZxOXa2CgkGTxgR6KFQojExoVShTA==
{"type":"asset","asset_id":"815b0b1a-2764-3736-8faa-42d694fa620a","chain_id":"c6d0c728-2624-429b-8e0d-d9d19b6592fa","symbol":"USDT","name":"Tether USD","icon_url":"https://images.mixin.one/ndNBEpObYs7450U08oAOMnSEPzN66SL8Mh-f2pPWBDeWaKbXTPUIdrZph7yj8Z93Rl8uZ16m7Qjz-E-9JFKSsJ-F=s128","balance":"2","public_key":"15RNBb5GzoXWRoEMT5MJL3pqzSjdPoXf6J","account_name":"","account_tag":"","price_btc":"0.00018747","price_usd":"0.98731224","change_btc":"0.021985715750932774","change_usd":"-0.01843154053058167","asset_key":"815b0b1a-2764-3736-8faa-42d694fa620a","confirmations":6,"capitalization":0}
2.0
--------------815b0b1a-2764-3736-8faa-42d694fa620a Transfer To EXCHANGE Information---------
{"type":"transfer","snapshot_id":"f526fd18-c3d2-4a6d-a0f0-3a720e93c48e","opponent_id":"aaff5bef-42fb-4c9f-90e0-29f69176b7d4","asset_id":"815b0b1a-2764-3736-8faa-42d694fa620a","amount":"-2","trace_id":"6cf37ca6-4efa-4e78-bea1-53c5c5d54d2b","memo":"hKFToUKhQcQQyUrIj0ZxOXa2CgkGTxgR6KFQojExoVShTA==","created_at":"2019-04-26T01:56:00.803572612Z","counter_user_id":"0b4f49dc-8fb4-4539-9a89-fb3afc613747"}
---Order is 6cf37ca6-4efa-4e78-bea1-53c5c5d54d2b: ------
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取消掛單

Ocean.one將trace_id當作訂單，好比上面的例子， 6cf37ca6-4efa-4e78-bea1-53c5c5d54d2b 就是訂單號，咱們用他來取消訂單。

public static String GenerateOrderCancelMemo(String myUuid) {
  try {
    MessageBufferPacker m = MessagePack.newDefaultBufferPacker();
    UUID AssetUUID  =  UUID.fromString(myUuid);
    Value map = ValueFactory.newMap(
                                    ValueFactory.newString("O"), ValueFactory.newBinary(asBytes(AssetUUID)) );
    m.packValue(map);
    return Base64.getEncoder().encodeToString(m.toByteArray());
  } catch (Exception e) { e.printStackTrace(); }
    return "";
}
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經過讀取資產餘額，來確認到賬狀況

Check the wallet's balance.

MixinAPI mixinApiUser = generateAPI_FromCSV();
JsonObject asset = mixinApiUser.getAsset(BTC_ASSET_ID);
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源代碼執行

編譯執行，便可開始交易了.

  • gradle build 編譯項目.
  • java -cp 運行項目.
java -cp .:build/libs/bitcoin_wallet-java.jar:libs/* bitcoin_wallet.java.App
複製代碼

注意：不能使用gradle run來運行，由於咱們使用的System.console().readLine()不被Gradle支持，只能使用java -cp 來運行！

本代碼執行時的命令列表:

  • 1: Create Bitcoin Wallet and update PIN
  • 2: Read Bitcoin balance & address
  • 3: Read USDT balance & address
  • 4: Read EOS balance & address
  • tbb:Transfer BTC from Bot to Wallet
  • tbm:Transfer BTC from Wallet to Master
  • teb:Transfer EOS from Bot to Wallet
  • tem:Transfer EOS from Wallet to Master
  • tub:Transfer USDT from Bot to Wallet
  • tum:Transfer USDT from Wallet to Master
  • 5: pay 0.0001 BTC buy USDT
  • 6: pay $1 USDT buy BTC
  • 7: Read Snapshots
  • 8: Fetch market price(USDT)
  • 9: Fetch market price(BTC)
  • v: Verify Wallet Pin
  • wb: Withdraw BTC
  • we: WitchDraw EOS
  • a: Read All Assets Infos
  • o: Ocean.One Exchange
  • q: Exit

Make your choose(eg: q for Exit!):

  • 1: Orders-Book of BTC/USDT
  • b1: Buy BTC pay USDT
  • s1: Sell BTC get USDT
  • 2: Orders-Book of EOS/USDT
  • b2: Buy EOS pay USDT
  • s2: Sell EOS get USDT
  • 3: Orders-Book of XIN/USDT
  • b3: Buy XIN pay USDT
  • s3: Sell XIN get USDT
  • 4: Orders-Book of XIN/BTC
  • b4: Buy XIN pay BTC
  • s4: Sell XIN get BTC
  • 5: Orders-Book of EOS/BTC
  • b4: Buy EOS pay BTC
  • s4: Sell EOS get BTC
  • 6: Orders-Book of SC/BTC
  • b6: Buy SC pay BTC
  • s6: Sell SC get BTC
  • 7: Orders-Book of EOS/XIN
  • b7: Buy EOS pay XIN
  • s7: Sell EOS get XIN
  • 8: Orders-Book of ETH/XIN
  • b8: Buy ETH pay XIN
  • s8: Sell EOS get XIN
  • 9: Orders-Book of SC/XIN
  • b9: Buy SC pay XIN
  • s9: Sell SC get XIN
  • c: Cancel the order
  • q: Exit

完整代碼

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