feat: Add block metadata event support

- Implement BlockMetaEvent and SDKSystemEventParser
- Support block metadata subscription and processing
- Optimize event handling with separate tokio tasks
- Add commitment parameter support
- Upgrade version to 0.1.3

src/streaming/event_parser/core/traits.rs

@@ -1,4 +1,6 @@
 use anyhow::Result;
+use borsh::BorshDeserialize;
+use serde::{Deserialize, Serialize};
 use solana_sdk::{
     instruction::CompiledInstruction, pubkey::Pubkey, transaction::VersionedTransaction,
 };
@@ -7,7 +9,9 @@ use solana_transaction_status::{
 };
 use std::fmt::Debug;
 use std::{collections::HashMap, str::FromStr};
+use yellowstone_grpc_proto::geyser::SubscribeUpdateBlockMeta;
 
+use crate::impl_unified_event;
 use crate::streaming::event_parser::common::{
     parse_transfer_datas_from_next_instructions, TransferData,
 };
@@ -53,6 +57,18 @@ pub trait UnifiedEvent: Debug + Send + Sync {
     fn set_transfer_datas(&mut self, transfer_datas: Vec<TransferData>);
 }
 
+/// block meta 事件
+#[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
+pub struct BlockMetaEvent {
+    pub metadata: EventMetadata,
+    pub slot: u64,
+    pub blockhash: String,
+    pub block_time: i64,
+}
+
+// 使用宏生成UnifiedEvent实现，指定需要合并的字段
+impl_unified_event!(BlockMetaEvent,);
+
 /// 事件解析器trait - 定义了事件解析的核心方法
 #[async_trait::async_trait]
 pub trait EventParser: Send + Sync {
@@ -534,3 +550,26 @@ impl EventParser for GenericEventParser {
         vec![self.program_id]
     }
 }
+
+pub struct SDKSystemEventParser {}
+impl SDKSystemEventParser {
+    pub fn parse_block(block: SubscribeUpdateBlockMeta) -> Box<dyn UnifiedEvent> {
+        Box::new(BlockMetaEvent {
+            metadata: EventMetadata::new(
+                block.blockhash.to_string(),
+                "".to_string(),
+                block.slot,
+                ProtocolType::SDKSystem,
+                EventType::SDKSystem,
+                Pubkey::default(),
+            ),
+            slot: block.slot,
+            blockhash: block.blockhash.to_string(),
+            block_time: if let Some(block_time) = block.block_time {
+                block_time.timestamp
+            } else {
+                0
+            },
+        })
+    }
+}