From 7c85bfd791b39120229aa6d9612f3da65e724c80 Mon Sep 17 00:00:00 2001
From: Christian Krueger <christian@jito.wtf>
Date: Thu, 24 Oct 2024 15:10:08 -0600
Subject: [PATCH] no zero zero return from mint_to

---
 clients/js/vault_client/errors/jitoVault.ts                  | 4 ++++
 clients/rust/vault_client/src/generated/errors/jito_vault.rs | 3 +++
 idl/jito_vault.json                                          | 5 +++++
 vault_program/src/mint_to.rs                                 | 5 +++++
 vault_sdk/src/error.rs                                       | 2 ++
 5 files changed, 19 insertions(+)

diff --git a/clients/js/vault_client/errors/jitoVault.ts b/clients/js/vault_client/errors/jitoVault.ts
index 0e9eb912..64ce4663 100644
--- a/clients/js/vault_client/errors/jitoVault.ts
+++ b/clients/js/vault_client/errors/jitoVault.ts
@@ -124,6 +124,8 @@ export const JITO_VAULT_ERROR__INVALID_DEPOSIT_TOKEN_ACCOUNT = 0x41c; // 1052
 export const JITO_VAULT_ERROR__NO_SUPPORTED_MINT_BALANCE_CHANGE = 0x41d; // 1053
 /** InvalidEpochLength: InvalidEpochLength */
 export const JITO_VAULT_ERROR__INVALID_EPOCH_LENGTH = 0x41e; // 1054
+/** NoZeroReturnMintTo: NoZeroReturnMintTo */
+export const JITO_VAULT_ERROR__NO_ZERO_RETURN_MINT_TO = 0x41f; // 1055
 /** ArithmeticOverflow: ArithmeticOverflow */
 export const JITO_VAULT_ERROR__ARITHMETIC_OVERFLOW = 0xbb8; // 3000
 /** ArithmeticUnderflow: ArithmeticUnderflow */
@@ -143,6 +145,7 @@ export type JitoVaultError =
   | typeof JITO_VAULT_ERROR__NCN_VAULT_SLASHER_TICKET_UNSLASHABLE
   | typeof JITO_VAULT_ERROR__NCN_VAULT_TICKET_UNSLASHABLE
   | typeof JITO_VAULT_ERROR__NO_SUPPORTED_MINT_BALANCE_CHANGE
+  | typeof JITO_VAULT_ERROR__NO_ZERO_RETURN_MINT_TO
   | typeof JITO_VAULT_ERROR__OPERATOR_OVERFLOW
   | typeof JITO_VAULT_ERROR__OPERATOR_VAULT_TICKET_UNSLASHABLE
   | typeof JITO_VAULT_ERROR__SLASHER_OVERFLOW
@@ -205,6 +208,7 @@ if (process.env.NODE_ENV !== 'production') {
     [JITO_VAULT_ERROR__NCN_VAULT_SLASHER_TICKET_UNSLASHABLE]: `NcnVaultSlasherTicketUnslashable`,
     [JITO_VAULT_ERROR__NCN_VAULT_TICKET_UNSLASHABLE]: `NcnVaultTicketUnslashable`,
     [JITO_VAULT_ERROR__NO_SUPPORTED_MINT_BALANCE_CHANGE]: `NoSupportedMintBalanceChange`,
+    [JITO_VAULT_ERROR__NO_ZERO_RETURN_MINT_TO]: `NoZeroReturnMintTo`,
     [JITO_VAULT_ERROR__OPERATOR_OVERFLOW]: `OperatorOverflow`,
     [JITO_VAULT_ERROR__OPERATOR_VAULT_TICKET_UNSLASHABLE]: `OperatorVaultTicketUnslashable`,
     [JITO_VAULT_ERROR__SLASHER_OVERFLOW]: `SlasherOverflow`,
diff --git a/clients/rust/vault_client/src/generated/errors/jito_vault.rs b/clients/rust/vault_client/src/generated/errors/jito_vault.rs
index 481bb10d..17bc305b 100644
--- a/clients/rust/vault_client/src/generated/errors/jito_vault.rs
+++ b/clients/rust/vault_client/src/generated/errors/jito_vault.rs
@@ -174,6 +174,9 @@ pub enum JitoVaultError {
     /// 1054 - InvalidEpochLength
     #[error("InvalidEpochLength")]
     InvalidEpochLength = 0x41E,
+    /// 1055 - NoZeroReturnMintTo
+    #[error("NoZeroReturnMintTo")]
+    NoZeroReturnMintTo = 0x41F,
     /// 3000 - ArithmeticOverflow
     #[error("ArithmeticOverflow")]
     ArithmeticOverflow = 0xBB8,
diff --git a/idl/jito_vault.json b/idl/jito_vault.json
index 5dc61b17..cfa818bd 100644
--- a/idl/jito_vault.json
+++ b/idl/jito_vault.json
@@ -2456,6 +2456,11 @@
       "name": "InvalidEpochLength",
       "msg": "InvalidEpochLength"
     },
+    {
+      "code": 1055,
+      "name": "NoZeroReturnMintTo",
+      "msg": "NoZeroReturnMintTo"
+    },
     {
       "code": 3000,
       "name": "ArithmeticOverflow",
diff --git a/vault_program/src/mint_to.rs b/vault_program/src/mint_to.rs
index d4f148f2..01062988 100644
--- a/vault_program/src/mint_to.rs
+++ b/vault_program/src/mint_to.rs
@@ -92,6 +92,11 @@ pub fn process_mint(
         vrt_to_fee_wallet,
     } = vault.mint_with_fee(amount_in, min_amount_out)?;
 
+    if vrt_to_depositor == 0 {
+        msg!("Depositor will not receive any VRT");
+        return Err(VaultError::NoZeroReturnMintTo.into());
+    }
+
     // transfer tokens from depositor to vault
     {
         invoke(
diff --git a/vault_sdk/src/error.rs b/vault_sdk/src/error.rs
index 3212f5d6..1b0431a7 100644
--- a/vault_sdk/src/error.rs
+++ b/vault_sdk/src/error.rs
@@ -113,6 +113,8 @@ pub enum VaultError {
     NoSupportedMintBalanceChange,
     #[error("InvalidEpochLength")]
     InvalidEpochLength,
+    #[error("NoZeroReturnMintTo")]
+    NoZeroReturnMintTo,
 
     #[error("ArithmeticOverflow")]
     ArithmeticOverflow = 3000,