fix(pumpfun): resolve creator_vault with fee-sharing PDA (mint-aware)

- Add get_fee_sharing_config_pda per @pump-fun/pump-sdk (sharing-config + mint under pump-fees)
- resolve_creator_vault_for_ix now takes mint: accept gRPC creator_vault when it matches either
  PDA(creator) or PDA(fee_sharing_config(mint)) for migrated / fee-sharing bonding curves
- Mayhem uses the same Pump buy/sell account layout (IDL); Token-2022 + fee pool differ, not creator_vault seeds

Made-with: Cursor

src/instruction/pumpfun.rs

@@ -46,13 +46,17 @@ impl InstructionBuilder for PumpFunInstructionBuilder {
         // creator_vault must be PDA(creator) per bonding curve. Event vault: use only if == derived;
         // if stream sends a mismatched vault (wrong token / stale), fall back to derived.
         let creator = bonding_curve.creator;
-        let creator_vault_pda = resolve_creator_vault_for_ix(&creator, protocol_params.creator_vault)
-            .ok_or_else(|| {
-                anyhow!(
-                    "creator_vault PDA derivation failed (creator={})",
-                    creator
-                )
-            })?;
+        let creator_vault_pda = resolve_creator_vault_for_ix(
+            &creator,
+            protocol_params.creator_vault,
+            &params.output_mint,
+        )
+        .ok_or_else(|| {
+            anyhow!(
+                "creator_vault PDA derivation failed (creator={})",
+                creator
+            )
+        })?;
 
         // ========================================
         // Trade calculation and account address preparation
@@ -206,13 +210,17 @@ impl InstructionBuilder for PumpFunInstructionBuilder {
 
         let bonding_curve = &protocol_params.bonding_curve;
         let creator = bonding_curve.creator;
-        let creator_vault_pda = resolve_creator_vault_for_ix(&creator, protocol_params.creator_vault)
-            .ok_or_else(|| {
-                anyhow!(
-                    "creator_vault PDA derivation failed (creator={})",
-                    creator
-                )
-            })?;
+        let creator_vault_pda = resolve_creator_vault_for_ix(
+            &creator,
+            protocol_params.creator_vault,
+            &params.input_mint,
+        )
+        .ok_or_else(|| {
+            anyhow!(
+                "creator_vault PDA derivation failed (creator={})",
+                creator
+            )
+        })?;
 
         // ========================================
         // Trade calculation and account address preparation

src/instruction/utils/pumpfun.rs

@@ -55,6 +55,9 @@ pub mod seeds {
     pub const GLOBAL_VOLUME_ACCUMULATOR_SEED: &[u8] = b"global_volume_accumulator";
 
     pub const FEE_CONFIG_SEED: &[u8] = b"fee_config";
+
+    /// `feeSharingConfig` PDA under pump-fees (`@pump-fun/pump-sdk` `feeSharingConfigPda`)
+    pub const SHARING_CONFIG_SEED: &[u8] = b"sharing-config";
 }
 
 pub mod global_constants {
@@ -342,18 +345,39 @@ pub fn get_creator_vault_pda(creator: &Pubkey) -> Option<Pubkey> {
     )
 }
 
-/// Creator vault for buy/sell must be `PDA(["creator-vault", bonding_curve.creator])` (same as on-chain).
-/// Use gRPC `from_event` only when it equals that PDA; if it differs (wrong mint / stale parse), use derived.
+/// `feeSharingConfig` PDA per mint (`pump-sdk` `feeSharingConfigPda` → `pump-fees` program).
 #[inline]
-pub fn resolve_creator_vault_for_ix(creator: &Pubkey, from_event: Pubkey) -> Option<Pubkey> {
-    let derived = get_creator_vault_pda(creator)?;
+pub fn get_fee_sharing_config_pda(mint: &Pubkey) -> Option<Pubkey> {
+    Pubkey::try_find_program_address(
+        &[seeds::SHARING_CONFIG_SEED, mint.as_ref()],
+        &accounts::FEE_PROGRAM,
+    )
+    .map(|(p, _)| p)
+}
+
+/// Creator vault for buy/sell must be `PDA(["creator-vault", bonding_curve.creator])` (IDL `bonding_curve.creator`).
+/// After fee-sharing migration, on-chain `creator` may be [`get_fee_sharing_config_pda`]`(mint)` while gRPC
+/// still sends the wallet — accept `from_event` when it matches either `PDA(wallet)` or `PDA(sharing_cfg)`.
+#[inline]
+pub fn resolve_creator_vault_for_ix(
+    creator: &Pubkey,
+    from_event: Pubkey,
+    mint: &Pubkey,
+) -> Option<Pubkey> {
+    let v_creator = get_creator_vault_pda(creator)?;
+    let sharing = get_fee_sharing_config_pda(mint)?;
+    let v_sharing = get_creator_vault_pda(&sharing)?;
+
     if from_event == Pubkey::default() {
-        Some(derived)
-    } else if from_event == derived {
-        Some(from_event)
-    } else {
-        Some(derived)
+        return Some(v_creator);
     }
+    if from_event == v_creator || from_event == v_sharing {
+        return Some(from_event);
+    }
+    if v_creator == v_sharing {
+        return Some(v_creator);
+    }
+    Some(v_creator)
 }
 
 #[inline]
@@ -436,4 +460,12 @@ mod tests {
         let b = get_creator_vault_pda(&creator).unwrap();
         assert_eq!(a, b);
     }
+
+    #[test]
+    fn fee_sharing_config_pda_deterministic() {
+        let mint = Pubkey::new_unique();
+        let a = get_fee_sharing_config_pda(&mint).unwrap();
+        let b = get_fee_sharing_config_pda(&mint).unwrap();
+        assert_eq!(a, b);
+    }
 }

src/trading/core/params.rs

@@ -185,6 +185,7 @@ impl PumpFunParams {
         let creator_vault_resolved = crate::instruction::utils::pumpfun::resolve_creator_vault_for_ix(
             &bonding_curve_account.creator,
             creator_vault,
+            &mint,
         )
         .unwrap_or_default();
         Self {
@@ -232,6 +233,7 @@ impl PumpFunParams {
         let creator_vault_resolved = crate::instruction::utils::pumpfun::resolve_creator_vault_for_ix(
             &bonding_curve.creator,
             creator_vault,
+            &mint,
         )
         .unwrap_or_default();
         Self {