feat: Add support for buy_exact_sol_in and buy_exact_quote_in instructions

PumpFun and PumpSwap have additional buy instruction variants that were not being parsed:

- PumpFun: `buy_exact_sol_in` (discriminator: [56, 252, 116, 8, 158, 223, 205, 95])
- PumpSwap: `buy_exact_quote_in` (discriminator: [198, 46, 21, 82, 180, 217, 232, 112])

These discriminators are from the official PumpFun IDL:
https://github.com/pump-fun/pump-public-docs/tree/main/idl

Without this fix, approximately 4-5% of trades were being missed.

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

@@ -366,6 +366,7 @@ pub mod discriminators {
     pub const CREATE_TOKEN_IX: &[u8] = &[24, 30, 200, 40, 5, 28, 7, 119];
     pub const CREATE_V2_TOKEN_IX: &[u8] = &[214, 144, 76, 236, 95, 139, 49, 180];
     pub const BUY_IX: &[u8] = &[102, 6, 61, 18, 1, 218, 235, 234];
+    pub const BUY_EXACT_SOL_IN_IX: &[u8] = &[56, 252, 116, 8, 158, 223, 205, 95];
     pub const SELL_IX: &[u8] = &[51, 230, 133, 164, 1, 127, 131, 173];
     pub const MIGRATE_IX: &[u8] = &[155, 234, 231, 146, 236, 158, 162, 30];
 

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

@@ -27,7 +27,7 @@ pub fn parse_pumpfun_instruction_data(
         discriminators::CREATE_V2_TOKEN_IX => {
             parse_create_v2_token_instruction(data, accounts, metadata)
         }
-        discriminators::BUY_IX => parse_buy_instruction(data, accounts, metadata),
+        discriminators::BUY_IX | discriminators::BUY_EXACT_SOL_IN_IX => parse_buy_instruction(data, accounts, metadata),
         discriminators::SELL_IX => parse_sell_instruction(data, accounts, metadata),
         discriminators::MIGRATE_IX => parse_migrate_instruction(data, accounts, metadata),
         _ => None,

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

@@ -289,6 +289,7 @@ pub mod discriminators {
 
     // 指令鉴别器
     pub const BUY_IX: &[u8] = &[102, 6, 61, 18, 1, 218, 235, 234];
+    pub const BUY_EXACT_QUOTE_IN_IX: &[u8] = &[198, 46, 21, 82, 180, 217, 232, 112];
     pub const SELL_IX: &[u8] = &[51, 230, 133, 164, 1, 127, 131, 173];
     pub const CREATE_POOL_IX: &[u8] = &[233, 146, 209, 142, 207, 104, 64, 188];
     pub const DEPOSIT_IX: &[u8] = &[242, 35, 198, 137, 82, 225, 242, 182];

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

@@ -24,7 +24,7 @@ pub fn parse_pumpswap_instruction_data(
     metadata: EventMetadata,
 ) -> Option<DexEvent> {
     match discriminator {
-        discriminators::BUY_IX => parse_buy_instruction(data, accounts, metadata),
+        discriminators::BUY_IX | discriminators::BUY_EXACT_QUOTE_IN_IX => parse_buy_instruction(data, accounts, metadata),
         discriminators::SELL_IX => parse_sell_instruction(data, accounts, metadata),
         discriminators::CREATE_POOL_IX => {
             parse_create_pool_instruction(data, accounts, metadata)