refactor: Major SDK architecture refactoring and API consolidation

- Consolidate separate buy/sell modules into unified trading interface
- Remove protocol-specific buy/sell files (bonk, pumpfun, pumpswap)
- Add new trading constants and utility functions
- Simplify API with unified buy/sell methods supporting multiple protocols
- Enhance documentation with comprehensive examples and usage guides
- Add balance checking and token account management utilities
- Improve code organization and maintainability

src/streaming/event_parser/protocols/bonk/events.rs

@@ -1,7 +1,7 @@
 use crate::streaming::event_parser::protocols::bonk::types::{
     CurveParams, MintParams, PoolStatus, TradeDirection, VestingParams,
 };
-use crate::streaming::event_parser::{common::EventMetadata, core::traits::UnifiedEvent};
+use crate::streaming::event_parser::common::EventMetadata;
 use crate::impl_unified_event;
 use borsh::BorshDeserialize;
 use serde::{Deserialize, Serialize};

src/streaming/event_parser/protocols/pumpfun/events.rs

@@ -2,7 +2,7 @@ use borsh::BorshDeserialize;
 use serde::{Deserialize, Serialize};
 use solana_sdk::pubkey::Pubkey;
 
-use crate::streaming::event_parser::{common::EventMetadata, core::traits::UnifiedEvent};
+use crate::streaming::event_parser::common::EventMetadata;
 use crate::impl_unified_event;
 
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]

src/streaming/event_parser/protocols/pumpfun/parser.rs

@@ -2,7 +2,7 @@ use solana_sdk::{instruction::CompiledInstruction, pubkey::Pubkey};
 use solana_transaction_status::UiCompiledInstruction;
 
 use crate::streaming::event_parser::{
-    common::{utils::*, EventMetadata, EventType, ProtocolType},
+    common::{EventMetadata, EventType, ProtocolType},
     core::traits::{EventParser, GenericEventParseConfig, GenericEventParser, UnifiedEvent},
     protocols::pumpfun::{discriminators, PumpFunCreateTokenEvent, PumpFunTradeEvent},
 };

src/streaming/event_parser/protocols/pumpswap/events.rs

@@ -2,7 +2,7 @@ use borsh::BorshDeserialize;
 use serde::{Deserialize, Serialize};
 use solana_sdk::pubkey::Pubkey;
 
-use crate::streaming::event_parser::{common::EventMetadata, core::traits::UnifiedEvent};
+use crate::streaming::event_parser::common::EventMetadata;
 use crate::impl_unified_event;
 
 /// 买入事件

src/streaming/yellowstone_grpc.rs

@@ -4,10 +4,8 @@ use chrono::Local;
 use futures::{channel::mpsc, sink::Sink, SinkExt, Stream, StreamExt};
 use log::{error, info};
 use rustls::crypto::{ring::default_provider, CryptoProvider};
-use solana_sdk::{pubkey, pubkey::Pubkey, signature::Signature};
-use solana_transaction_status::{
-    option_serializer::OptionSerializer, EncodedTransactionWithStatusMeta, UiTransactionEncoding,
-};
+use solana_sdk::{pubkey::Pubkey, signature::Signature};
+use solana_transaction_status::{EncodedTransactionWithStatusMeta, UiTransactionEncoding};
 use tonic::{transport::channel::ClientTlsConfig, Status};
 use yellowstone_grpc_client::{GeyserGrpcClient, Interceptor};
 use yellowstone_grpc_proto::geyser::{
@@ -21,8 +19,6 @@ use crate::streaming::event_parser::{EventParserFactory, Protocol, UnifiedEvent}
 
 type TransactionsFilterMap = HashMap<String, SubscribeRequestFilterTransactions>;
 
-const PUMP_PROGRAM_ID: Pubkey = pubkey!("6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P");
-const SYSTEM_PROGRAM_ID: Pubkey = pubkey!("11111111111111111111111111111111");
 const CONNECT_TIMEOUT: u64 = 10;
 const REQUEST_TIMEOUT: u64 = 60;
 const CHANNEL_SIZE: usize = 1000;