fix(svm): N-04 reset use of PDA signer in multicall handler

Signed-off-by: Reinis Martinsons <[email protected]>

programs/multicall-handler/src/lib.rs

@@ -17,11 +17,13 @@ pub mod multicall_handler {
     pub fn handle_v3_across_message(ctx: Context<HandleV3AcrossMessage>, message: Vec<u8>) -> Result<()> {
         // Some instructions might require being signed by handler PDA.
         let (handler_signer, bump) = Pubkey::find_program_address(&[b"handler_signer"], &crate::ID);
-        let mut use_handler_signer = false;
 
         let compiled_ixs: Vec<CompiledIx> = AnchorDeserialize::deserialize(&mut &message[..])?;
 
         for compiled_ix in compiled_ixs {
+            // Will only sign with handler PDA if it is included in this instruction's accounts (checked below).
+            let mut use_handler_signer = false;
+
             let mut accounts = Vec::with_capacity(compiled_ix.account_key_indexes.len());
             let mut account_infos = Vec::with_capacity(compiled_ix.account_key_indexes.len());