Fix transfer-fee mint_size and metadata MetadataPointer COption flags

- transfer-fee: correct mint_size from 378 to 278 (165+1+4+108 bytes;
  TransferFeeConfig is 108 bytes with no struct padding)
- metadata: add 1-byte COption flags to InitializeMetadataPointer
  instruction (66→68 bytes): [39, 0, 1, authority(32), 1, addr(32)]

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mikemaccana

tokens/token-2022/metadata/quasar/src/lib.rs

@@ -99,11 +99,14 @@ pub fn handle_initialize(
         .invoke()?;
 
     // InitializeMetadataPointer: opcode 39, sub-opcode 0.
-    let mut mp_data = [0u8; 66];
+    // Layout: [39, 0, COption_flag(1), authority(32), COption_flag(1), metadata_address(32)]
+    let mut mp_data = [0u8; 68];
     mp_data[0] = 39;
     mp_data[1] = 0;
-    mp_data[2..34].copy_from_slice(accounts.payer.to_account_view().address().as_ref());
-    mp_data[34..66]
+    mp_data[2] = 1; // COption::Some for authority
+    mp_data[3..35].copy_from_slice(accounts.payer.to_account_view().address().as_ref());
+    mp_data[35] = 1; // COption::Some for metadata_address
+    mp_data[36..68]
         .copy_from_slice(accounts.mint_account.to_account_view().address().as_ref());
 
     CpiCall::new(

tokens/token-2022/transfer-fee/quasar/src/lib.rs

@@ -70,8 +70,8 @@ pub struct Initialize<'info> {
 
 #[inline(always)]
 pub fn handle_initialize(accounts: &Initialize, basis_points: u16, max_fee: u64) -> Result<(), ProgramError> {
-    // Mint + TransferFeeConfig extension = 378 bytes
-    let mint_size: u64 = 378;
+    // 165 (base) + 1 (AccountType) + 4 (TLV header) + 108 (TransferFeeConfig data) = 278 bytes
+    let mint_size: u64 = 278;
     let lamports = Rent::get()?.try_minimum_balance(mint_size as usize)?;
 
     accounts.system_program