BitcoinjRegtestSetup: Implement wallet funding

core/src/integrationTest/java/bisq/core/BitcoinjRegtestSetup.java

@@ -0,0 +1,53 @@
+package bisq.core;
+
+import org.bitcoinj.core.Address;
+import org.bitcoinj.core.Coin;
+import org.bitcoinj.wallet.Wallet;
+import org.bitcoinj.wallet.listeners.WalletCoinsReceivedEventListener;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+
+
+import bisq.wallets.regtest.bitcoind.BitcoindRegtestSetup;
+
+public class BitcoinjRegtestSetup {
+    private final BitcoindRegtestSetup bitcoindRegtestSetup;
+
+    public BitcoinjRegtestSetup(BitcoindRegtestSetup bitcoindRegtestSetup) {
+        this.bitcoindRegtestSetup = bitcoindRegtestSetup;
+    }
+
+    public void fundWallet(Wallet wallet, double amount) throws InterruptedException {
+        var walletReceivedLatch = new CountDownLatch(1);
+        WalletCoinsReceivedEventListener coinsReceivedEventListener =
+                (affectedWallet, tx, prevBalance, newBalance) -> {
+                    walletReceivedLatch.countDown();
+                };
+
+        wallet.addCoinsReceivedEventListener(coinsReceivedEventListener);
+        Coin previousBalance = wallet.getBalance();
+
+        Address currentReceiveAddress = wallet.currentReceiveAddress();
+        String address = currentReceiveAddress.toString();
+        bitcoindRegtestSetup.fundAddress(address, amount);
+        bitcoindRegtestSetup.mineOneBlock();
+
+        boolean isSuccess = walletReceivedLatch.await(30, TimeUnit.SECONDS);
+        wallet.removeCoinsReceivedEventListener(coinsReceivedEventListener);
+        if (!isSuccess) {
+            throw new IllegalStateException("Wallet not funded after 30 seconds.");
+        }
+
+        Coin balance = wallet.getBalance();
+        Coin receivedAmount = balance.minus(previousBalance);
+
+        long receivedAmountAsLong = receivedAmount.value;
+        long fundedAmount = (long) amount * 100_000_000;
+        if (receivedAmount.value != fundedAmount) {
+            throw new IllegalStateException("Wallet balance is " + receivedAmountAsLong +
+                    " but should be " + fundedAmount + ".");
+        }
+    }
+}