Java比特幣開發教程：在開放式交易所限價買賣比特幣

lanffy 發布于2019-06-27 19:16 / 2588人閱讀

摘要：如果你想限定價格買賣，或者買賣一些不支持的資產，你需要。完整的步驟如下檢查比特幣或的余額，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。比特幣的到帳時間是個區塊的高度，約分鐘。

上一章介紹了Exincore，你可以1秒完成資產的市價買賣。如果你想限定價格買賣，或者買賣一些exincore不支持的資產，你需要OceanOne。

方案二: 掛單Ocean.One交易所

Ocean.one是基于Mixin Network的去中心化交易所，它中心化交易所一樣友好。
你可以在OceanOne上交易任何資產，只需要將你的幣轉給OceanOne, 將交易信息寫在交易的memo里，OceanOne會在市場里列出你的交易需求，
交易成功后，會將目標幣轉入到你的MixinNetwork帳上，它有三大特點與優勢：

不需要在OceanOne注冊

不需要存幣到交易所

支持所有Mixin Network上能夠轉賬的資產，所有的ERC20 EOS代幣。

預備知識:

你先需要創建一個機器人, 方法在教程一.

安裝依賴包

正如教程一里我們介紹過的，我們需要依賴 mixin-java-sdk, 你應該先安裝過它了，zhang/mixin_labs-java-bot/blob/master/README.md).

Install required packages

第四課, 在上一課中已經安裝好了.

充幣到 Mixin Network, 并讀出它的余額.

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。
完整的步驟如下:

檢查比特幣或USDT的余額，錢包地址。并記下錢包地址。

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。

再檢查一下幣的余額，看到帳與否。(比特幣的到帳時間是5個區塊的高度，約100分鐘)。

比特幣與USDT的充值地址是一樣的。

  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("-----------------------------------------------------------------------");

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么，如果你想買比特幣，賣出USDT,那么基礎貨幣就是USDT;如果你想買USDT,賣出比特幣，那么基礎貨幣就是比特幣.

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;
}

交易前，創建一個Memo!

在第二章里,基于Mixin Network的 Java 比特幣開發教程: 機器人接受比特幣并立即退還用戶, 我們學習過轉帳，這兒我們介紹如何告訴Ocean.one，我們給它轉帳的目的是什么，信息全部放在memo里.

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，如果操作方向是"B", 價格就是AssetUUID的價格; 如果操作方向是"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 "";
}

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.

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--------------------------------------------");
}

如果你是打算買BTC,操作如下:

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--------------------------------------------");
}

一個成功的掛單如下：

------------------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: ------

取消掛單

Ocean.one將trace_id當做訂單，比如上面的例子， 6cf37ca6-4efa-4e78-bea1-53c5c5d54d2b 就是訂單號，我們用他來取消訂單。

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 "";
}

通過讀取資產余額，來確認到帳情況

Check the wallet"s balance.

MixinAPI mixinApiUser = generateAPI_FromCSV();
JsonObject asset = mixinApiUser.getAsset(BTC_ASSET_ID);

源代碼執行

編譯執行，即可開始交易了.

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

注意：不能使用gradle run來運行，因為我們使用的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

GPU云服務器云服務器比特幣機在云服務器上跑以太幣和比特幣比特幣比特幣勒索

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