feat(pumpfun): add fee_config and fee_program, close #132

learning-examples/manual_buy.py

@@ -33,6 +33,7 @@ PUMP_EVENT_AUTHORITY = Pubkey.from_string(
     "Ce6TQqeHC9p8KetsN6JsjHK7UTZk7nasjjnr7XxXp9F1"
 )
 PUMP_FEE = Pubkey.from_string("CebN5WGQ4jvEPvsVU4EoHEpgzq1VV7AbicfhtW4xC9iM")
+PUMP_FEE_PROGRAM = Pubkey.from_string("pfeeUxB6jkeY1Hxd7CsFCAjcbHA9rWtchMGdZ6VojVZ")
 SYSTEM_PROGRAM = Pubkey.from_string("11111111111111111111111111111111")
 SYSTEM_TOKEN_PROGRAM = Pubkey.from_string("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA")
 SYSTEM_ASSOCIATED_TOKEN_ACCOUNT_PROGRAM = Pubkey.from_string(
@@ -117,6 +118,14 @@ def _find_user_volume_accumulator(user: Pubkey) -> Pubkey:
     return derived_address
 
 
+def _find_fee_config() -> Pubkey:
+    derived_address, _ = Pubkey.find_program_address(
+        [b"fee_config", bytes(PUMP_PROGRAM)],
+        PUMP_FEE_PROGRAM,
+    )
+    return derived_address
+
+
 async def buy_token(
     mint: Pubkey,
     bonding_curve: Pubkey,
@@ -176,6 +185,18 @@ async def buy_token(
                 is_signer=False,
                 is_writable=True,
             ),
+            # Index 14: fee_config (readonly)
+            AccountMeta(
+                pubkey=_find_fee_config(),
+                is_signer=False,
+                is_writable=False,
+            ),
+            # Index 15: fee_program (readonly)
+            AccountMeta(
+                pubkey=PUMP_FEE_PROGRAM,
+                is_signer=False,
+                is_writable=False,
+            ),
         ]
 
         discriminator = struct.pack("<Q", 16927863322537952870)