Quickstart

TIP

If you are new to trading, you can read our tutorial Trading basics.

Create your project

If you don't have an existing spring boot project, you can use our maven archetype (opens new window) to generate one :

mvn archetype:generate \
-DarchetypeGroupId=tech.cassandre.trading.bot \
-DarchetypeArtifactId=cassandre-trading-bot-spring-boot-starter-basic-archetype \
-DarchetypeVersion=4.2.0

(opens new window)

It will ask for the following parameters:

Parameters	Description	Examples
groupId	The id of the project's group	com.mycompany.app
artifactId	The id of the artifact (project)	my-app
version	The version of the artifact under the specified group	1.0-SNAPSHOT
package	The java package	com.mycompany.app

The created project will have the following structure and files :

my-app/
├── pom.xml
└── src
    ├── main
    │   ├── java
    │   │   └── com
    │   │       └── mycompany
    │   │           └── app
    │   │               ├── Application.java
    │   │               ├── package-info.java
    │   │               └── SimpleStrategy.java
    │   └── resources
    │       ├── application.properties
    │       ├── user-main.tsv
    │       └── user-trade.tsv
    └── test
        ├── java
        │   └── com
        │       └── mycompany
        │           └── app
        │               └── SimpleStrategyTest.java
        └── resources
            ├── application.properties
            ├── tickers-btc-usdt.tsv
            ├── user-main.tsv
            └── user-trade.tsv

Review configuration

Your bot configuration is located in src/main/resources/application.properties :

#
# Exchange configuration.
cassandre.trading.bot.exchange.name=kucoin
cassandre.trading.bot.exchange.username=kucoin.cassandre.test@gmail.com
cassandre.trading.bot.exchange.passphrase=cassandre
cassandre.trading.bot.exchange.key=6054ad25365ac6000689a998
cassandre.trading.bot.exchange.secret=af080d55-afe3-47c9-8ec1-4b479fbcc5e7
#
# Modes.
cassandre.trading.bot.exchange.modes.sandbox=true
cassandre.trading.bot.exchange.modes.dry=false
#
# Exchange API calls rates (ms or standard ISO 8601 duration like 'PT5S').
cassandre.trading.bot.exchange.rates.account=2000
cassandre.trading.bot.exchange.rates.ticker=2000
cassandre.trading.bot.exchange.rates.trade=2000
#
# Database configuration.
cassandre.trading.bot.database.datasource.driver-class-name=org.hsqldb.jdbc.JDBCDriver
cassandre.trading.bot.database.datasource.url=jdbc:hsqldb:mem:cassandre
cassandre.trading.bot.database.datasource.username=sa
cassandre.trading.bot.database.datasource.password=

TIP

Please, create and configure your own Kucoin account. You can learn how to do it here.

Explore sources

The src/main/java/com/mycompany/app/Application.java file is a classical spring boot Application.

package com.mycompany.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Application start.
 */
@SpringBootApplication
public class Application {

	public static void main(final String[] args) {
		SpringApplication.run(Application.class, args);
	}

}

The src/main/java/com/mycompany/app/SimpleStrategy.java is the strategy executed by the bot:

package com.mycompany.app;

import tech.cassandre.trading.bot.dto.market.TickerDTO;
import tech.cassandre.trading.bot.dto.position.PositionDTO;
import tech.cassandre.trading.bot.dto.trade.OrderDTO;
import tech.cassandre.trading.bot.dto.trade.TradeDTO;
import tech.cassandre.trading.bot.dto.user.AccountDTO;
import tech.cassandre.trading.bot.strategy.BasicCassandreStrategy;
import tech.cassandre.trading.bot.strategy.CassandreStrategy;
import tech.cassandre.trading.bot.util.dto.CurrencyDTO;
import tech.cassandre.trading.bot.util.dto.CurrencyPairDTO;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

/**
 * Simple strategy.
 */
@CassandreStrategy(strategyName = "Simple strategy")
public final class SimpleStrategy extends BasicCassandreStrategy {

	@Override
	public Set<CurrencyPairDTO> getRequestedCurrencyPairs() {
		// We only ask about ETC/BTC (Base currency : BTC / Quote currency : USDT).
		return Set.of(new CurrencyPairDTO(BTC, USDT));
	}

	@Override
	public Optional<AccountDTO> getTradeAccount(Set<AccountDTO> accounts) {
		// From all the accounts retrieved by the server, we return the one we used for trading.
		return accounts.stream()
				.filter(a -> "trade".equals(a.getName()))
				.findFirst();
	}

	@Override
	public void onAccountUpdate(final AccountDTO account) {
		// Here, we will receive an AccountDTO each time there is a change on your account.
		System.out.println("Received information about an account : " + account);
	}

	@Override
	public void onTickerUpdate(final TickerDTO ticker) {
		// Here we will receive a TickerDTO each time a new one is available.
		System.out.println("Received information about a ticker : " + ticker);
	}

	@Override
	public void onOrderUpdate(final OrderDTO order) {
		// Here, we will receive an OrderDTO each time order data has changed on the exchange.
		System.out.println("Received information about an order : " + order);
	}

	@Override
	public void onTradeUpdate(final TradeDTO trade) {
		// Here, we will receive a TradeDTO each time trade data has changed on the exchange.
		System.out.println("Received information about a trade : " + trade);
	}

	@Override
	public void onPositionUpdate(final PositionDTO position) {
		// Here, we will receive a PositionDTO each time a position has changed.
		System.out.println("Received information about a position : " + position);
	}

	@Override
	public void onPositionStatusUpdate(final PositionDTO position) {
		// Here, we will receive a PositionDTO each time a position status has changed.
		System.out.println("Received information about a position status : " + position);
	}	

}

A Cassandre strategy is a class annotated with @CassandreStrategy (opens new window) and extending BasicCassandreStrategy (opens new window) or BasicTa4jCassandreStrategy (opens new window).

This is how it works :

• In getRequestedCurrencyPairs() (opens new window), you have to return the list of currency pairs updates you want to receive from the exchange.
• On the exchange, you usually have several accounts, and Cassandre needs to know which one of your accounts is the trading one. To do so, you have to implement the getTradeAccount() (opens new window) method, which gives you as a parameter the list of accounts you own, and from that list, you have to return only one.
• If there is a change in your account data, onAccountUpdate() (opens new window) will be called.
• When a new ticker is available, onTickerUpdate() (opens new window) will be called.
• If there is a change in your orders, onOrderUpdate() (opens new window) will be called.
• If there is a change in your trades, onTradeUpdate() (opens new window) will be called.
• If there is a change in your positions, onPositionUpdate() (opens new window) will be called.
• If there is a change in your position status, onPositionStatusUpdate() (opens new window) will be called.

Manage orders and positions

You can create an order like this :

@Override
public void onTickerUpdate(final TickerDTO ticker) {
     createBuyMarketOrder(new CurrencyPairDTO(BTC, USDT), new BigDecimal("0,001"));
}

This is the list of available methods :

• createBuyMarketOrder() (opens new window).
• createSellMarketOrder() (opens new window).
• createBuyLimitOrder() (opens new window).
• createSellLimitOrder() (opens new window).

TIP

Inside your strategy, you can call canBuy() (opens new window) and canSell() (opens new window) methods to see if your account has enough money to buy or sell assets.

Cassandre trading bot also provides positions to manage your trade automatically :

// Create rule.
PositionRulesDTO rules = PositionRulesDTO.builder()
                .stopGainPercentage(10)
                .stopLossPercentage(5)
                .create();
// Create position.
createLongPosition(new CurrencyPairDTO(BTC, USDT),
                new BigDecimal("0,001"),
                rules);

First, we created a rule saying this position should be closed if the gain is more than 10% or if the loss is more than 5%.

Then we called the createLongPosition() (opens new window) method. This will automatically create a buy order. From now, for every ticker received, Cassandre will check the gain or loss made on this position; if it triggers one of the rules, Cassandre will automatically create a sell order to close the position.

TIP

You can learn more about positions in the Position chapter.

Run the bot and the strategy

In the project folder, run :

mvn spring-boot:run

The logs should display something like this :

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.4.0)

19:06:04 - Starting Application using Java 11.0.9.1 on straumat-pc-portable with PID 158157 (/home/straumat/tmp/my-app/target/classes started by straumat in /home/straumat/tmp/my-app)
19:06:04 - No active profile set, falling back to default profiles: default
19:06:04 - Bootstrapping Spring Data JPA repositories in DEFERRED mode.
19:06:04 - Finished Spring Data repository scanning in 4 ms. Found 0 JPA repository interfaces.
19:06:04 - Bootstrapping Spring Data JPA repositories in DEFAULT mode.
19:06:04 - Finished Spring Data repository scanning in 49 ms. Found 5 JPA repository interfaces.
19:06:04 - HikariPool-1 - Starting...
19:06:04 - HikariPool-1 - Driver does not support get/set network timeout for connections. (feature not supported)
19:06:04 - HikariPool-1 - Start completed.
19:06:05 - Successfully acquired change log lock
19:06:05 - Creating database history table with name: PUBLIC.DATABASECHANGELOG
19:06:05 - Reading from PUBLIC.DATABASECHANGELOG
19:06:05 - Table EXCHANGE_ACCOUNTS created
19:06:05 - Auto-increment added to EXCHANGE_ACCOUNTS.ID
19:06:05 - Table STRATEGIES created
19:06:05 - Auto-increment added to STRATEGIES.ID
19:06:05 - Table POSITIONS created
19:06:05 - Auto-increment added to POSITIONS.ID
19:06:05 - Table ORDERS created
19:06:05 - Auto-increment added to ORDERS.ID
19:06:05 - Table TRADES created
19:06:05 - Auto-increment added to TRADES.ID
19:06:05 - Foreign key constraint added to STRATEGIES (FK_EXCHANGE_ACCOUNT_ID)
19:06:05 - Foreign key constraint added to POSITIONS (FK_STRATEGY_ID)
19:06:05 - Foreign key constraint added to POSITIONS (FK_OPENING_ORDER_ID)
19:06:05 - Foreign key constraint added to POSITIONS (FK_CLOSING_ORDER_ID)
19:06:05 - Foreign key constraint added to ORDERS (FK_STRATEGY_ID)
19:06:05 - Foreign key constraint added to TRADES (FK_ORDER_ID)
19:06:05 - Index IDX_STRATEGIES_STRATEGY_ID created
19:06:05 - Index IDX_POSITIONS_POSITION_ID created
19:06:05 - Index IDX_POSITIONS_STATUS created
19:06:05 - Index IDX_POSITIONS_FK_OPENING_ORDER_ID created
19:06:05 - Index IDX_POSITIONS_FK_CLOSING_ORDER_ID created
19:06:05 - Index IDX_ORDERS_ORDER_ID created
19:06:05 - Index IDX_TRADES_TRADE_ID created
19:06:05 - Index IDX_TRADES_ORDER_ID created
19:06:05 - ChangeSet db/changelog/db.changelog-4.0.0.xml::changelog-4.0.0::straumat ran successfully in 34ms
19:06:05 - Successfully released change log lock
19:06:05 - Initializing ExecutorService 'applicationTaskExecutor'
19:06:05 - HHH000204: Processing PersistenceUnitInfo [name: default]
19:06:05 - HHH000412: Hibernate ORM core version 5.4.27.Final
19:06:05 - HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
19:06:05 - HHH000400: Using dialect: org.hibernate.dialect.HSQLDialect
19:06:06 - HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
19:06:06 - Initialized JPA EntityManagerFactory for persistence unit 'default'
19:06:06 - Calling Remote Init...
19:06:07 - ExchangeConfiguration - Dry mode is ON
19:06:07 - Adding account 'main'
19:06:07 - - Adding balance 99.0001 BTC
19:06:07 - Adding account 'trade'
19:06:07 - - Adding balance 1 BTC
19:06:07 - - Adding balance 100000 USDT
19:06:07 - - Adding balance 10 ETH
19:06:08 - ExchangeConfiguration - Connection to kucoin successful
19:06:08 - ExchangeConfiguration - Supported currency pairs : BTC/USDT 
19:06:08 - ExchangeConfiguration - exchange configuration saved in database ExchangeAccount(id=1, exchange=kucoin, account=cassandre.crypto.bot@gmail.com)
19:06:08 - StrategyConfiguration - Running strategy 'Simple strategy'
19:06:08 - StrategyConfiguration - The strategy requires the following currency pair(s) : BTC/USDT
19:06:08 - Triggering deferred initialization of Spring Data repositories…
19:06:08 - Spring Data repositories initialized!
19:06:08 - No TaskScheduler/ScheduledExecutorService bean found for scheduled processing
19:06:08 - Started Application in 4.975 seconds (JVM running for 5.193)
Received information about an account : AccountDTO(accountId=main, name=main, features=[], balances={BTC=BalanceDTO(currency=BTC, total=null, available=99.0001, frozen=null, loaned=null, borrowed=null, withdrawing=null, depositing=null)})
Received information about an account : AccountDTO(accountId=trade, name=trade, features=[], balances={BTC=BalanceDTO(currency=BTC, total=null, available=1, frozen=null, loaned=null, borrowed=null, withdrawing=null, depositing=null), USDT=BalanceDTO(currency=USDT, total=null, available=100000, frozen=null, loaned=null, borrowed=null, withdrawing=null, depositing=null), ETH=BalanceDTO(currency=ETH, total=null, available=10, frozen=null, loaned=null, borrowed=null, withdrawing=null, depositing=null)})
Received information about a ticker : TickerDTO(currencyPair=BTC/USDT, open=null, last=37072.9, bid=37070.3, ask=37072.9, high=37250.3, low=34400, vwap=null, volume=74075.19293933, quoteVolume=2677417785.328956311, bidSize=null, askSize=null, timestamp=2021-02-03T19:06:08.055+01:00[Europe/Paris])