code review

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

programs/mango-v4/src/error.rs

@@ -7,5 +7,7 @@ pub enum MangoError {
     #[msg("")]
     SomeError,
     #[msg("")]
-    UnknownOracle,
+    UnexpectedOracle,
+    #[msg("")]
+    UnknownOracleType,
 }

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

@@ -132,6 +132,8 @@ pub fn withdraw(ctx: Context<Withdraw>, amount: u64, allow_borrow: bool) -> Resu
         // converts the token value to the basis token value for health computations
         // TODO: health basis token == USDC?
         let oracle_type = determine_oracle_type(oracle_ai)?;
+        require!(bank.oracle == oracle_ai.key(), MangoError::UnexpectedOracle);
+
         let price = match oracle_type {
             OracleType::Stub => {
                 AccountLoader::<'_, StubOracle>::try_from(oracle_ai)?

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

@@ -23,5 +23,5 @@ pub fn determine_oracle_type(account: &AccountInfo) -> Result<OracleType> {
         return Ok(OracleType::Stub);
     }
 
-    Err(MangoError::UnknownOracle.into())
+    Err(MangoError::UnknownOracleType.into())
 }

programs/mango-v4/tests/program_test/mango_client.rs

@@ -7,6 +7,7 @@ use solana_program::instruction::Instruction;
 use solana_sdk::instruction;
 use solana_sdk::signature::{Keypair, Signer};
 use solana_sdk::transport::TransportError;
+use std::str::FromStr;
 
 use super::solana::SolanaCookie;
 use mango_v4::state::*;
@@ -294,6 +295,7 @@ impl<'keypair> ClientInstruction for RegisterTokenInstruction<'keypair> {
 pub struct SetStubOracle<'keypair> {
     pub mint: Pubkey,
     pub payer: &'keypair Keypair,
+    pub price: &'static str,
 }
 #[async_trait::async_trait(?Send)]
 impl<'keypair> ClientInstruction for SetStubOracle<'keypair> {
@@ -306,7 +308,7 @@ impl<'keypair> ClientInstruction for SetStubOracle<'keypair> {
     ) -> (Self::Accounts, Instruction) {
         let program_id = mango_v4::id();
         let instruction = Self::Instruction {
-            price: I80F48::from_num(1.0),
+            price: I80F48::from_str(self.price).unwrap(),
         };
 
         let oracle = Pubkey::find_program_address(

programs/mango-v4/tests/test_basic.rs

@@ -65,16 +65,7 @@ async fn test_basic() -> Result<(), TransportError> {
         SetStubOracle {
             mint: mint0.pubkey,
             payer,
-        },
+            price: "1.0",
-    )
-    .await
-    .unwrap();
-
-    send_tx(
-        solana,
-        CreateStubOracle {
-            mint: mint0.pubkey,
-            payer,
         },
     )
     .await