Java

An FFM (Panama) wrapper over the C ABI. The same Exchange API — a paper account fills through the wickra-backtest engine behind the trait a live venue uses.

xml

<!-- Maven Central -->
<dependency>
  <groupId>org.wickra</groupId>
  <artifactId>wickra-exchange</artifactId>
  <version>0.1.0</version>
</dependency>

java

import java.util.Map;
import org.wickra.exchange.Exchange;

public final class PaperTrade {
    public static void main(String[] args) {
        try (Exchange ex = Exchange.paper(Map.of("USDT", 100_000.0), 1, 5, 10)) {
            System.out.println("venue: " + ex.name());
            ex.setPrice("BTC/USDT", 20_000.0);

            Exchange.OrderInfo order = ex.placeMarket("BTC/USDT", Exchange.Side.BUY, 1.0);
            System.out.println("filled at " + order.averagePrice() + " (status " + order.status() + ")");

            System.out.println("  BTC free: " + ex.balance("BTC"));
        }
    }
}

The binding uses the Java Foreign Function & Memory API, so it needs JDK 22+ and --enable-native-access.

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