From cc2d46bf4aef45f9a7e831286a28792951d0a777 Mon Sep 17 00:00:00 2001
From: microwavedcola1 <microwavedcola@gmail.com>
Date: Fri, 27 May 2022 14:52:03 +0200
Subject: [PATCH] add support for mint decimals on bank, for easy look up

Signed-off-by: microwavedcola1 <microwavedcola@gmail.com>
---
 programs/mango-v4/src/instructions/register_token.rs |  1 +
 programs/mango-v4/src/state/bank.rs                  |  4 +++-
 ts/client/src/accounts/bank.ts                       |  3 +++
 ts/client/src/mango_v4.ts                            | 12 ++++++++++--
 4 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/programs/mango-v4/src/instructions/register_token.rs b/programs/mango-v4/src/instructions/register_token.rs
index 4a4544889..f88f15ac4 100644
--- a/programs/mango-v4/src/instructions/register_token.rs
+++ b/programs/mango-v4/src/instructions/register_token.rs
@@ -131,6 +131,7 @@ pub fn register_token(
         token_index,
         bump: *ctx.bumps.get("bank").ok_or(MangoError::SomeError)?,
         reserved: Default::default(),
+        mint_decimals: ctx.accounts.mint.decimals,
     };
 
     // TODO: ALTs are unavailable
diff --git a/programs/mango-v4/src/state/bank.rs b/programs/mango-v4/src/state/bank.rs
index 1949382d9..2d0b7af76 100644
--- a/programs/mango-v4/src/state/bank.rs
+++ b/programs/mango-v4/src/state/bank.rs
@@ -61,7 +61,9 @@ pub struct Bank {
 
     pub bump: u8,
 
-    pub reserved: [u8; 5],
+    pub mint_decimals: u8,
+
+    pub reserved: [u8; 4],
 }
 const_assert_eq!(size_of::<Bank>(), 16 + 32 * 4 + 8 + 16 * 18 + 3 + 5);
 const_assert_eq!(size_of::<Bank>() % 8, 0);
diff --git a/ts/client/src/accounts/bank.ts b/ts/client/src/accounts/bank.ts
index 537ed8efc..f777a8d50 100644
--- a/ts/client/src/accounts/bank.ts
+++ b/ts/client/src/accounts/bank.ts
@@ -39,6 +39,7 @@ export class Bank {
       liquidationFee: I80F48Dto;
       dust: Object;
       tokenIndex: number;
+      mintDecimals: number;
     },
   ) {
     return new Bank(
@@ -68,6 +69,7 @@ export class Bank {
       obj.liquidationFee,
       obj.dust,
       obj.tokenIndex,
+      obj.mintDecimals,
     );
   }
 
@@ -98,6 +100,7 @@ export class Bank {
     liquidationFee: I80F48Dto,
     dust: Object,
     public tokenIndex: number,
+    public mintDecimals: number,
   ) {
     this.name = utf8.decode(new Uint8Array(name)).split('\x00')[0];
     this.depositIndex = I80F48.from(depositIndex);
diff --git a/ts/client/src/mango_v4.ts b/ts/client/src/mango_v4.ts
index 82b141a22..36ccd3fb7 100644
--- a/ts/client/src/mango_v4.ts
+++ b/ts/client/src/mango_v4.ts
@@ -1730,12 +1730,16 @@ export type MangoV4 = {
             "name": "bump",
             "type": "u8"
           },
+          {
+            "name": "mintDecimals",
+            "type": "u8"
+          },
           {
             "name": "reserved",
             "type": {
               "array": [
                 "u8",
-                5
+                4
               ]
             }
           }
@@ -4626,12 +4630,16 @@ export const IDL: MangoV4 = {
             "name": "bump",
             "type": "u8"
           },
+          {
+            "name": "mintDecimals",
+            "type": "u8"
+          },
           {
             "name": "reserved",
             "type": {
               "array": [
                 "u8",
-                5
+                4
               ]
             }
           }