insurance fund for trustless vs not trustful

Signed-off-by: microwavedcola1 <microwavedcola@gmail.com>

programs/mango-v4/src/instructions/liq_token_bankruptcy.rs

@@ -31,6 +31,7 @@ pub struct LiqTokenBankruptcy<'info> {
     #[account(
         has_one = group,
         constraint = liab_mint_info.load()?.token_index == liab_token_index,
+        constraint = liab_mint_info.load()?.elligible_for_group_insurance_fund()
     )]
     pub liab_mint_info: AccountLoader<'info, MintInfo>,
 

programs/mango-v4/src/instructions/token_register.rs

@@ -153,7 +153,8 @@ pub fn token_register(
         vaults: Default::default(),
         oracle: ctx.accounts.oracle.key(),
         registration_time: Clock::get()?.unix_timestamp,
-        reserved: [0; 256],
+        group_insurance_fund: 1,
+        reserved: [0; 255],
     };
 
     mint_info.banks[0] = ctx.accounts.bank.key();

programs/mango-v4/src/instructions/token_register_trustless.rs

@@ -123,7 +123,8 @@ pub fn token_register_trustless(
         vaults: Default::default(),
         oracle: ctx.accounts.oracle.key(),
         registration_time: Clock::get()?.unix_timestamp,
-        reserved: [0; 256],
+        group_insurance_fund: 0,
+        reserved: [0; 255],
     };
 
     mint_info.banks[0] = ctx.accounts.bank.key();

programs/mango-v4/src/state/mint_info.rs

@@ -28,12 +28,13 @@ pub struct MintInfo {
     pub oracle: Pubkey,
 
     pub registration_time: i64,
+    pub group_insurance_fund: u8,
 
-    pub reserved: [u8; 256],
+    pub reserved: [u8; 255],
 }
 const_assert_eq!(
     size_of::<MintInfo>(),
-    MAX_BANKS * 2 * 32 + 3 * 32 + 2 + 8 + 6 + 256
+    MAX_BANKS * 2 * 32 + 3 * 32 + 2 + 8 + 6 + 1 + 255
 );
 const_assert_eq!(size_of::<MintInfo>() % 8, 0);
 
@@ -67,4 +68,8 @@ impl MintInfo {
         );
         Ok(())
     }
+
+    pub fn elligible_for_group_insurance_fund(&self) -> bool {
+        self.group_insurance_fund == 1
+    }
 }