Add Uniswap v3 swap event streaming

- Added SwapEventLog data stream to DataStreamJob
- Created SwapEventLog DTO for swap event processing
- Added JSON mapping and printing for swap events

src/main/java/stream/DataStreamJob.java

@@ -76,6 +76,7 @@ public class DataStreamJob {
 
         DataStream<MintEventLog> mintStream = getEventStream(env, webSocketUri, MintEventLog.SIGNATURE, MintEventLog.class, "Uniswap v3 Mint Events");
         DataStream<BurnEventLog> burnStream = getEventStream(env, webSocketUri, BurnEventLog.SIGNATURE, BurnEventLog.class, "Uniswap v3 Burn Events");
+        DataStream<SwapEventLog> swapStream = getEventStream(env, webSocketUri, SwapEventLog.SIGNATURE, SwapEventLog.class, "Uniswap v3 Swap Events");
 
         // Map the blocks to pretty-printed JSON strings
 /*
@@ -130,6 +131,16 @@ public class DataStreamJob {
                 })
                 .print("Burn Event: ");
 
+        swapStream
+                .map(event -> {
+                    try {
+                        return mapper.writeValueAsString(event);
+                    } catch (Exception e) {
+                        return "Error converting swap event to JSON: " + e.getMessage();
+                    }
+                })
+                .print("Swap Event: ");
+
         env.execute("Ethereum Block Stream");
     }
 

src/main/java/stream/dto/SwapEventLog.java

@@ -0,0 +1,42 @@
+package stream.dto;
+
+import java.io.Serializable;
+import java.math.BigInteger;
+
+
+/*
+/// @notice Emitted by the pool for any swaps between token0 and token1
+/// @param sender The address that initiated the swap call
+/// @param recipient The address that received the output of the swap
+/// @param amount0 The delta of the token0 balance of the pool
+/// @param amount1 The delta of the token1 balance of the pool
+/// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
+/// @param liquidity The liquidity of the pool after the swap
+/// @param tick The log base 1.0001 of price of the pool after the swap
+event Swap(
+    address sender,
+    address recipient,
+    int256 amount0,
+    int256 amount1,
+    uint160 sqrtPriceX96,
+    uint128 liquidity,
+    int24 tick
+);
+*/
+
+public class SwapEventLog extends EventLog implements Serializable {
+    public static final String SIGNATURE = "Swap(address indexed sender, address indexed recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)";
+
+    public String sender;
+    public String recipient;
+    @BigInt
+    public BigInteger amount0;
+    @BigInt
+    public BigInteger amount1;
+    @BigInt
+    public BigInteger sqrtPriceX96;
+    @BigInt
+    public BigInteger liquidity;
+    public int tick;
+
+}