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How to list any ERC20 token on decentralized market through Java

Author
Mixin Network
Published
2022/04/29
Updated
2019/05/25
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How to list any ERC20 token on decentralized market through Java

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OceanOne is introduced in last chapter, you can trade Bitcoin. All kinds of crypto asset on Mixin Network can be listed on OceanOne.All ERC20 token and EOS token can be listed. Following example will show you how to list a ERC20 token.

There is a ERC20 token called Benz. It is deposited into Mixin Network. You can search all transaction history from Mixin Network browser

Pre-request:

Deposit some coin to your wallet, and then use getAssets API fetch the asset UUID which Mixin Network gave it.

Get the ERC-20 compliant coin UUID

The getAssets API return json data, for example:

  • asset_id UUID of this coin
  • public_key The wallet address for this coin
  • symbol Coin name, Eg: Benz.
if ( input.equals("aw") ) {
  MixinAPI mixinApiUser = generateAPI_FromCSV();
  JsonArray assets = mixinApiUser.getAssets();
  System.out.println("------------------------All Assets Information---------------------------");
  System.out.println(assets);
  assets.forEach((element) ->  {
     JsonObject jsonObj = element.getAsJsonObject();
     System.out.println(jsonObj.get("asset_id").getAsString() + " " +
                        jsonObj.get("symbol").getAsString() + " " +
                        jsonObj.get("public_key").getAsString() + " " +
                        jsonObj.get("balance").getAsString() );
  });
  System.out.println("-----------------------------------------------------------------------");
}

The detail information of getAssets is output like below:

Make your choose(eg: q for Exit!): aw
aw
------------------------All Assets Information---------------------------
[{"type":"asset","asset_id":"2b9c216c-ef60-398d-a42a-eba1b298581d","chain_id":"43d61dcd-e413-450d-80b8-101d5e903357","symbol":"Benz","name":"Benz coin","icon_url":"https://images.mixin.one/yH_I5b0GiV2zDmvrXRyr3bK5xusjfy5q7FX3lw3mM2Ryx4Dfuj6Xcw8SHNRnDKm7ZVE3_LvpKlLdcLrlFQUBhds=s128","balance":"1000","public_key":"0x62F20013472a72b8Fe3f9a99f36e5802E6e93c15","account_name":"","account_tag":"","price_btc":"0","price_usd":"0","change_btc":"0","change_usd":"0","asset_key":"0xc409b5696c5f9612e194a582e14c8cd41ecdbc67","confirmations":100,"capitalization":0},{"type":"asset","asset_id":"6cfe566e-4aad-470b-8c9a-2fd35b49c68d","chain_id":"6cfe566e-4aad-470b-8c9a-2fd35b49c68d","symbol":"EOS","name":"EOS","icon_url":"https://images.mixin.one/a5dtG-IAg2IO0Zm4HxqJoQjfz-5nf1HWZ0teCyOnReMd3pmB8oEdSAXWvFHt2AJkJj5YgfyceTACjGmXnI-VyRo=s128","balance":"0","public_key":"","account_name":"eoswithmixin","account_tag":"889ed66a1059bc3dab60e2ee44d0f993","price_btc":"0.0008953","price_usd":"4.73591781","change_btc":"-0.004161988128557199","change_usd":"0.00012182287348895748","asset_key":"eosio.token:EOS","confirmations":64,"capitalization":0},{"type":"asset","asset_id":"965e5c6e-434c-3fa9-b780-c50f43cd955c","chain_id":"43d61dcd-e413-450d-80b8-101d5e903357","symbol":"CNB","name":"Chui Niu Bi","icon_url":"https://images.mixin.one/0sQY63dDMkWTURkJVjowWY6Le4ICjAFuu3ANVyZA4uI3UdkbuOT5fjJUT82ArNYmZvVcxDXyNjxoOv0TAYbQTNKS=s128","balance":"0.99984","public_key":"0x62F20013472a72b8Fe3f9a99f36e5802E6e93c15","account_name":"","account_tag":"","price_btc":"0","price_usd":"0","change_btc":"0","change_usd":"0","asset_key":"0xec2a0550a2e4da2a027b3fc06f70ba15a94a6dac","confirmations":100,"capitalization":0},{"type":"asset","asset_id":"c6d0c728-2624-429b-8e0d-d9d19b6592fa","chain_id":"c6d0c728-2624-429b-8e0d-d9d19b6592fa","symbol":"BTC","name":"Bitcoin","icon_url":"https://images.mixin.one/HvYGJsV5TGeZ-X9Ek3FEQohQZ3fE9LBEBGcOcn4c4BNHovP4fW4YB97Dg5LcXoQ1hUjMEgjbl1DPlKg1TW7kK6XP=s128","balance":"0","public_key":"15RNBb5GzoXWRoEMT5MJL3pqzSjdPoXf6J","account_name":"","account_tag":"","price_btc":"1","price_usd":"5289.7409549","change_btc":"0","change_usd":"0.004160319338628907","asset_key":"c6d0c728-2624-429b-8e0d-d9d19b6592fa","confirmations":6,"capitalization":0}]
2b9c216c-ef60-398d-a42a-eba1b298581d Benz 0x62F20013472a72b8Fe3f9a99f36e5802E6e93c15 1000
6cfe566e-4aad-470b-8c9a-2fd35b49c68d EOS  0
965e5c6e-434c-3fa9-b780-c50f43cd955c CNB 0x62F20013472a72b8Fe3f9a99f36e5802E6e93c15 0.99984
c6d0c728-2624-429b-8e0d-d9d19b6592fa BTC 15RNBb5GzoXWRoEMT5MJL3pqzSjdPoXf6J 0

Make the limit order

  • Limit Order to Buy at or below the market.
  • Limit Order to Sell at or above the market.

OceanOne support three base coin: USDT, XIN, BTC, that mean you can sell or buy it between USDT, XIN, BTC, so, you have there order: Benz/USDT, Benz/XIN, Benz/BTC, here show you how to make the sell order with USDT.

Make the limit order to sell.

if ( subinput.equals("x2") ) {
  MakeTheSellOrder(ERC20_BENZ,USDT_ASSET_ID);
}
public static void MakeTheSellOrder(String AssetID, String BaseAssetID) {
  System.out.print(String.format("Please input the %s price of %s: ",AssetID,BaseAssetID));
  String pinput = System.console().readLine();
  System.out.println(pinput);

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

  String OrderMemo = GenerateOrderMemo("A",BaseAssetID,pinput);
  MixinAPI mixinApiUser = generateAPI_FromCSV();
  // UUID usdtUUID         =  UUID.fromString(USDT_ASSET_ID);
  // String memoTarget     = encodeUUID(usdtUUID);
  System.out.println("------------------Ocean.one-EXCHANGE----------------------------");
  System.out.println(OrderMemo);
  JsonObject asset = mixinApiUser.getAsset(AssetID);
  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(AssetID, OCEANONE_BOT,
                                                   aminput,
                                                   OrderMemo);
      System.out.println(String.format("--------------%s Transfer To EXCHANGE Information---------",AssetID));
      System.out.println(transInfo);
      System.out.println(String.format("---Order is %s: ------",transInfo.get("trace_id").getAsString()));
   } else System.out.println(String.format("----------------Not enough %s--------------------------",AssetID));
}

Make the limit order to buy.

After the order commit, wait 1 minute to let the OceanOne exchange initialize it.

if ( subinput.equals("x1") ) {
  MakeTheBuyOrder(ERC20_BENZ,USDT_ASSET_ID);
}
public static void MakeTheBuyOrder(String AssetID, String BaseAssetID) {
  System.out.print(String.format("Please input the %s price of %s: ",AssetID,BaseAssetID));
  String pinput = System.console().readLine();
  System.out.println(pinput);

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

  String OrderMemo = GenerateOrderMemo("B",AssetID,pinput);
  MixinAPI mixinApiUser = generateAPI_FromCSV();
  // UUID usdtUUID         =  UUID.fromString(USDT_ASSET_ID);
  // String memoTarget     = encodeUUID(usdtUUID);
  System.out.println("------------------Ocean.one--EXCHANGE----------------------------");
  System.out.println(OrderMemo);
  JsonObject asset = mixinApiUser.getAsset(BaseAssetID);
  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(BaseAssetID, OCEANONE_BOT,
                                                   aminput,
                                                   OrderMemo);
       System.out.println(String.format("--------------%s Transfer To EXCHANGE Information---------",BaseAssetID));
       System.out.println(transInfo);
       System.out.println(String.format("---Order is %s: ------",transInfo.get("trace_id").getAsString()));
    } else System.out.println(String.format("----------------Not enough %s--------------------------",BaseAssetID));
}

Read orders book from Ocean.one

Now, check the orders-book.

if ( subinput.equals("x") ) {
  FetchOceanMarketInfos(ERC20_BENZ,XIN_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;
}

Command of make orders

Commands list of this source code:

  • trb:Transfer ERC20 from Bot to Wallet
  • trm:Transfer ERC20 from Wallet to Master
  • o: Ocean.One Exchange

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

  • x: Orders-Book of ERC20/USDT
  • x1: Buy ERC20 pay USDT
  • x2: Sell ERC20 get USDT
  • c: Cancel the order
  • q: Exit

Full source code

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