用 C# 在去中心化交易所 OceanOne 上挂单买卖任意 ERC20 token

在上一课中，我们介绍了如何在 OceanOne 交易比特币。OceanOne 支持交易任何 Mixin Network 上的 token，包括所有的 ERC20 和 EOS token，不需要任何手续和费用，直接挂单即可。下面介绍如何将将一个 ERC20 token 挂上 OceanOne 交易。掌握了 ERC20 的代币买卖之后，你就可以用同样的方法买卖任何 EOS 以及其他 Mixin Network 上的 token

此处我们用一个叫做 Benz 的 ERC20 token 为例。这个 token 已经被充值进 Mixin Network，你可以在区块链浏览器看到这个 token 在 Mixin Network 内部的总数和交易

预备知识:

先将 Ben 币存入你的钱包，然后使用 getAssets API 读取它的 UUID.

取得该币的 UUID

调用 getAssets API 会返回 json 数据, 如:

• asset_id 币的 UUID.
• public_key 该币的当前钱包的地址.
• symbol 币的名称. 如: Benz.

if (cmd == "aw") {// Console.WriteLine(mixinApi.VerifyPIN(USRCONFIG.PinCode.ToString()).ToString());
    MixinApi mixinApiNewUser = GetWalletSDK();
    var assets = mixinApiNewUser.ReadAssets();
    string wuuid = GetWalletUUID();
    Console.WriteLine("Current wallet uuid is" + wuuid);
    foreach (Asset asset in assets)
    {if (asset.symbol == "EOS") {
       Console.WriteLine(asset.symbol + "Public Address is:" +
                         asset.account_name + " " +
                         asset.account_tag +
                         "Balance is:" + asset.balance);
     } else Console.WriteLine(asset.symbol + "Public Address is:" +
                              asset.public_key + "Balance is:" +
                              asset.balance);
    Console.WriteLine();}
}

调用 getAssets API 的完整输出如下:

Make your choose:
aw
Current wallet uuid is 85d5609d-d93b-3c96-96f6-58357c5d99eb
Benz Public Address is: 0x5fD0F147830a186545e6020F58fEc0c4B39065D4 Balance is: 1

EOS Public Address is: eoswithmixin 30399f17622cb2bfc57efd3393144bf9 Balance is: 0

USDT Public Address is: 1JvQ98N5Y8TvDbXr8eA8DHsNZqEuGbzzng Balance is: 1

BTC Public Address is: 1JvQ98N5Y8TvDbXr8eA8DHsNZqEuGbzzng Balance is: 0

XIN Public Address is: 0x5fD0F147830a186545e6020F58fEc0c4B39065D4 Balance is: 0.01

限价挂单

• 挂限价买单 低于或者等于市场价的单.
• 挂限价卖单 高于或者是等于市场价的单.

OceanOne 支持三种基类价格: USDT, XIN, BTC, 即: Benz/USDT, Benz/XIN, Benz/BTC, 这儿示范 Benz/USDT.

限价挂卖单.

新币挂单后, 需要等一分钟左右，等 OceanOne 来初始化新币的相关数据.

public static string  ERC20_BENZ     = "2b9c216c-ef60-398d-a42a-eba1b298581d";
if (cmdo == "s2") {Console.WriteLine("Please input the price of ERC20/USDT:");
  var pinput = Console.ReadLine();
  Console.WriteLine("Please input the amount of ERC20:");
  var ainput = Console.ReadLine();

  string memo = GenerateOrderMemo("A",USRCONFIG.ASSET_ID_USDT,pinput);
  Console.WriteLine(memo);
  // Console.WriteLine(Convert.ToBase64String(stream3.ToArray()));
  MixinApi mixinApiNewUser = GetWalletSDK();
  var assets = mixinApiNewUser.ReadAsset(USRCONFIG.ERC20_BENZ);
  float balance = float.Parse(assets.balance);
  float amount  = float.Parse(ainput);
  if (( balance >= 0) && (balance >= amount) ) {
    Transfer reqInfo = mixinApiNewUser.Transfer(USRCONFIG.ERC20_BENZ,
                            USRCONFIG.OCEANONE_BOT,
                            ainput,
                            GetWalletPinCode(),
                            System.Guid.NewGuid().ToString(),
                            memo);
    Console.WriteLine(reqInfo);
    Console.WriteLine("Order id is" + reqInfo.trace_id);
  } else Console.WriteLine("Not enough ERC20_BENZ!");
}

限价挂买单.

新币挂单后, 需要等一分钟左右，等 OceanOne 来初始化新币的相关数据.

if (cmdo == "b2") {Console.WriteLine("Please input the price of ERC20_BENZ/USDT:");
  var pinput = Console.ReadLine();
  Console.WriteLine("Please input the amount of USDT:");
  var ainput = Console.ReadLine();

  string memo = GenerateOrderMemo("B",USRCONFIG.ERC20_BENZ,pinput);
  Console.WriteLine(memo);
  MixinApi mixinApiNewUser = GetWalletSDK();
  var assets = mixinApiNewUser.ReadAsset(USRCONFIG.ASSET_ID_USDT);
  Console.WriteLine(assets.balance);
  float balance = float.Parse(assets.balance);
  float amount  = float.Parse(ainput);
  if (( balance >= 1.0) && (balance >= amount) ) {
    Transfer reqInfo = mixinApiNewUser.Transfer(USRCONFIG.ASSET_ID_USDT,
                            USRCONFIG.OCEANONE_BOT,
                            ainput,
                            GetWalletPinCode(),
                            System.Guid.NewGuid().ToString(),
                            memo);
    Console.WriteLine(reqInfo);
    Console.WriteLine("Order id is" + reqInfo.trace_id);
  } else Console.WriteLine("Not enough USDT!");
}

读取币的价格列表

读取币的价格列表，来确认挂单是否成功!

if (cmdo == "2") {string jsonData = FetchOceanMarketPrice(USRCONFIG.ERC20_BENZ,USRCONFIG.ASSET_ID_USDT);
  // string jsonData = FetchMarketPrice("c6d0c728-2624-429b-8e0d-d9d19b6592fa");
  var marketObj = JsonConvert.DeserializeObject<MarketInfoOcean>(jsonData);
  Console.WriteLine("--Price--Amount---Funds---Side----");
  foreach (order value in marketObj.data.data.asks)
  {Console.WriteLine(value.price + "" + value.amount +" "+ value.funds +" " + value.side);
  }
  foreach (order value in marketObj.data.data.bids)
  {Console.WriteLine(value.price + "" + value.amount +" "+ value.funds +" " + value.side);
  }
}
public static string FetchOceanMarketPrice(string asset_id, string base_asset)
{return FetchOceanMarketPriceAsync(asset_id,base_asset).Result;
}
public static async Task<string> FetchOceanMarketPriceAsync(string asset_id, string base_asset)
{HttpClient client = new HttpClient();
  string baseUrl = "https://events.ocean.one/markets/" + asset_id + "-" + base_asset + "/book";
  try
  {HttpResponseMessage response = await client.GetAsync(baseUrl);
     response.EnsureSuccessStatusCode();
     string responseBody = await response.Content.ReadAsStringAsync();
     // Above three lines can be replaced with new helper method below
     // string responseBody = await client.GetStringAsync(uri);
     Console.WriteLine(responseBody);
     return responseBody;
  }
  catch(HttpRequestException e)
  {Console.WriteLine("\nException Caught!");
     Console.WriteLine("Message :{0}",e.Message);
  }
  return null;
}

ERC20 相关的操作指令

Commands list of this source code:

• teb:Transfer ERC20 from Bot to Wallet
• tem:Transfer ERC20 from Wallet to Master
• o: Ocean.One Exchange

Make your choose:

• 1: Fetch XIN/USDT orders
• s1: Sell XIN/USDT
• b1: Buy XIN/USDT
• 2: Fetch ERC20(Benz)/USDT orders
• s2: Sell Benz/USDT
• b2: Buy Benz/USDT
• c: Cancel Order
• q: Exit

完整的代码