Setup java examples

Author: lealobanov

java-example/src/main/java/org/onflow/examples/java/getAccountBalance/GetAccountBalanceAccessAPIConnector.java

@@ -0,0 +1,34 @@
+package org.onflow.examples.java.getAccountBalance;
+
+import org.onflow.flow.sdk.FlowAccessApi;
+import org.onflow.flow.sdk.FlowAddress;
+
+public class GetAccountBalanceAccessAPIConnector {
+    private final FlowAccessApi accessAPI;
+
+    public GetAccountBalanceAccessAPIConnector(FlowAccessApi accessAPI) {
+        this.accessAPI = accessAPI;
+    }
+
+    public long getBalanceAtLatestBlock(FlowAddress address) {
+        FlowAccessApi.AccessApiCallResponse<Long> response = accessAPI.getAccountBalanceAtLatestBlock(address);
+
+        if (response instanceof FlowAccessApi.AccessApiCallResponse.Success) {
+            return ((FlowAccessApi.AccessApiCallResponse.Success<Long>) response).getData();
+        } else {
+            FlowAccessApi.AccessApiCallResponse.Error errorResponse = (FlowAccessApi.AccessApiCallResponse.Error) response;
+            throw new RuntimeException(errorResponse.getMessage(), errorResponse.getThrowable());
+        }
+    }
+
+    public long getBalanceAtBlockHeight(FlowAddress address, long height) {
+        FlowAccessApi.AccessApiCallResponse<Long> response = accessAPI.getAccountBalanceAtBlockHeight(address, height);
+
+        if (response instanceof FlowAccessApi.AccessApiCallResponse.Success) {
+            return ((FlowAccessApi.AccessApiCallResponse.Success<Long>) response).getData();
+        } else {
+            FlowAccessApi.AccessApiCallResponse.Error errorResponse = (FlowAccessApi.AccessApiCallResponse.Error) response;
+            throw new RuntimeException(errorResponse.getMessage(), errorResponse.getThrowable());
+        }
+    }
+}

java-example/src/test/java/org/onflow/examples/java/getAccountBalance/GetAccountBalanceAccessAPIConnectorTest.java

@@ -0,0 +1,77 @@
+package org.onflow.examples.java.getAccountBalance;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.onflow.flow.common.test.FlowEmulatorProjectTest;
+import org.onflow.flow.common.test.FlowServiceAccountCredentials;
+import org.onflow.flow.common.test.FlowTestClient;
+import org.onflow.flow.common.test.TestAccount;
+import org.onflow.flow.sdk.FlowAccessApi;
+import org.onflow.flow.sdk.FlowAddress;
+import org.onflow.flow.sdk.FlowBlock;
+
+@FlowEmulatorProjectTest(flowJsonLocation = "../flow/flow.json")
+public class GetAccountBalanceAccessAPIConnectorTest {
+
+    @FlowTestClient
+    private FlowAccessApi accessAPI;
+
+    @FlowServiceAccountCredentials
+    private TestAccount serviceAccount;
+
+    private GetAccountBalanceAccessAPIConnector balanceAPIConnector;
+
+    @BeforeEach
+    public void setup() {
+        balanceAPIConnector = new GetAccountBalanceAccessAPIConnector(accessAPI);
+    }
+
+    @Test
+    public void testCanFetchBalanceAtLatestBlock() {
+        FlowAddress address = serviceAccount.getFlowAddress();
+        long balance = balanceAPIConnector.getBalanceAtLatestBlock(address);
+
+        Assertions.assertTrue(balance >= 0, "Balance at the latest block should be non-negative");
+    }
+
+    @Test
+    public void testCanFetchBalanceAtSpecificBlockHeight() {
+        FlowAddress address = serviceAccount.getFlowAddress();
+
+        FlowAccessApi.AccessApiCallResponse<FlowBlock> latestBlockResponse = accessAPI.getLatestBlock(true);
+
+        if (latestBlockResponse instanceof FlowAccessApi.AccessApiCallResponse.Success) {
+            FlowBlock latestBlock = ((FlowAccessApi.AccessApiCallResponse.Success<FlowBlock>) latestBlockResponse).getData();
+            long blockHeight = latestBlock.getHeight();
+            long balanceAtHeight = balanceAPIConnector.getBalanceAtBlockHeight(address, blockHeight);
+
+            Assertions.assertTrue(balanceAtHeight >= 0, "Balance at specific block height should be non-negative");
+        } else {
+            FlowAccessApi.AccessApiCallResponse.Error errorResponse = (FlowAccessApi.AccessApiCallResponse.Error) latestBlockResponse;
+            Assertions.fail("Failed to fetch the latest block: " + errorResponse.getMessage());
+        }
+    }
+
+    @Test
+    public void testBalancesAtLatestBlockAndSpecificHeightShouldMatch() {
+        FlowAddress address = serviceAccount.getFlowAddress();
+
+        long balanceAtLatest = balanceAPIConnector.getBalanceAtLatestBlock(address);
+        FlowAccessApi.AccessApiCallResponse<FlowBlock> latestBlockResponse = accessAPI.getLatestBlock(true);
+
+        if (latestBlockResponse instanceof FlowAccessApi.AccessApiCallResponse.Success) {
+            FlowBlock latestBlock = ((FlowAccessApi.AccessApiCallResponse.Success<FlowBlock>) latestBlockResponse).getData();
+            long blockHeight = latestBlock.getHeight();
+
+            // Fetch balance at the same block height
+            long balanceAtHeight = balanceAPIConnector.getBalanceAtBlockHeight(address, blockHeight);
+
+            // Ensure balances match
+            Assertions.assertEquals(balanceAtLatest, balanceAtHeight, "Balance at latest block and specific block height should match");
+        } else {
+            FlowAccessApi.AccessApiCallResponse.Error errorResponse = (FlowAccessApi.AccessApiCallResponse.Error) latestBlockResponse;
+            Assertions.fail("Failed to fetch the latest block: " + errorResponse.getMessage());
+        }
+    }
+}

sdk/src/intTest/org/onflow/flow/sdk/transaction/TransactionIntegrationTest.kt

@@ -210,7 +210,6 @@ class TransactionIntegrationTest {
         assertThat(normalizedBalance).isEqualTo(account.balance.toBigInteger().longValueExact())
     }
 
-
     @Test
     fun `Can get latest block`() {
         val latestBlock = try {