feat(processor): implement place_order with fund-locking + Order PDA (Ticket 2.2)

Author: AJTECH001

src/instruction.rs

@@ -130,6 +130,8 @@ pub struct PlaceOrderAccounts<'a> {
     pub trader_quote_ata: &'a AccountView,
     pub base_vault: &'a AccountView,
     pub quote_vault: &'a AccountView,
+    pub base_mint: &'a AccountView,
+    pub quote_mint: &'a AccountView,
     pub system_program: &'a AccountView,
     pub token_program: &'a AccountView,
 }
@@ -138,7 +140,10 @@ impl<'a> TryFrom<&'a [AccountView]> for PlaceOrderAccounts<'a> {
     type Error = FluxDexError;
 
     fn try_from(accounts: &'a [AccountView]) -> Result<Self, Self::Error> {
-        if accounts.len() != 9 {
+        // The `base_mint`/`quote_mint` accounts are required (beyond TDD §5.3's
+        // original list) so the token CPI can use `transfer_checked`, which
+        // validates the mint and its decimals (TDD §6.1).
+        if accounts.len() != 11 {
             return Err(FluxDexError::InvalidAccountCount);
         }
 
@@ -150,6 +155,8 @@ impl<'a> TryFrom<&'a [AccountView]> for PlaceOrderAccounts<'a> {
             trader_quote_ata,
             base_vault,
             quote_vault,
+            base_mint,
+            quote_mint,
             system_program,
             token_program,
         ] = accounts
@@ -192,6 +199,8 @@ impl<'a> TryFrom<&'a [AccountView]> for PlaceOrderAccounts<'a> {
             trader_quote_ata,
             base_vault,
             quote_vault,
+            base_mint,
+            quote_mint,
             system_program,
             token_program,
         })