fix: enforce mint authority key validation in mint and set_authority

- mint.rs: validate caller account_id matches stored mint_authority key
- set_authority.rs: validate caller matches mint_authority before rotation/revoke
- tests.rs: align AUTHORITY constant and fixtures to match account_id [15; 32]
- demo-full-flow.sh: fix --public flag, remove || true from spel commands,
  update test count to 60

programs/token/src/mint.rs

@@ -24,10 +24,16 @@ pub fn mint(
 
     // LP-0013: enforce mint authority — minting is only allowed if mint_authority is Some.
     if let TokenDefinition::Fungible { mint_authority, .. } = &definition {
-        assert!(
+        match mint_authority {
-            mint_authority.is_some(),
+            None => panic!("Mint authority has been revoked; this token has a fixed supply"),
-            "Mint authority has been revoked; this token has a fixed supply"
+            Some(authority_key) => {
-        );
+                assert_eq!(
+                    definition_account.account_id.as_ref(),
+                    authority_key,
+                    "Signer is not the mint authority"
+                );
+            }
+        }
     }
     let mut holding = if user_holding_account.account == Account::default() {
         TokenHolding::zeroized_from_definition(definition_account.account_id, &definition)

programs/token/src/set_authority.rs

@@ -9,9 +9,6 @@ pub fn set_authority(
     definition_account: AccountWithMetadata,
     new_authority: Option<[u8; 32]>,
 ) -> Vec<AccountPostState> {
-    // The definition account must be authorized — this means the transaction
-    // signer controls the definition account, which is how mint authority
-    // is enforced in LEZ (account-level authorization).
     assert!(
         definition_account.is_authorized,
         "Definition account authorization is missing; only the mint authority can call SetAuthority"
@@ -26,8 +23,13 @@ pub fn set_authority(
                 None => {
                     panic!("Mint authority already revoked; supply is permanently fixed");
                 }
-                Some(_) => {
+                Some(authority_key) => {
-                    // Rotate to new authority, or revoke by setting to None
+                    // Validate caller matches the stored mint authority key
+                    assert_eq!(
+                        definition_account.account_id.as_ref(),
+                        authority_key.as_ref(),
+                        "Signer does not match the stored mint authority"
+                    );
                     *mint_authority = new_authority;
                 }
             }

programs/token/src/tests.rs

@@ -42,7 +42,7 @@ impl AccountForTests {
                     name: String::from("test"),
                     total_supply: BalanceForTests::init_supply(),
                     metadata_id: None,
-                    mint_authority: Some([1_u8; 32]),
+                    mint_authority: Some([15_u8; 32]),
                 }),
                 nonce: Nonce(0),
             },
@@ -160,7 +160,7 @@ impl AccountForTests {
                     name: String::from("test"),
                     total_supply: BalanceForTests::init_supply_burned(),
                     metadata_id: None,
-                    mint_authority: Some([1_u8; 32]),
+                    mint_authority: Some([15_u8; 32]),
                 }),
                 nonce: Nonce(0),
             },
@@ -242,7 +242,7 @@ impl AccountForTests {
                     name: String::from("test"),
                     total_supply: BalanceForTests::init_supply_mint(),
                     metadata_id: None,
-                    mint_authority: Some([1_u8; 32]),
+                    mint_authority: Some([15_u8; 32]),
                 }),
                 nonce: Nonce(0),
             },
@@ -1325,7 +1325,7 @@ mod authority_tests {
     use super::*;
     use crate::{mint::mint, set_authority::set_authority};
 
-    const AUTHORITY: [u8; 32] = [9_u8; 32];
+    const AUTHORITY: [u8; 32] = [15_u8; 32];
     const TOKEN_PROGRAM_ID: [u32; 8] = [5_u32; 8];
 
     fn def_with_authority() -> AccountWithMetadata {

scripts/demo-full-flow.sh

@@ -26,7 +26,7 @@
 #   4. Submit NewFungibleDefinitionWithAuthority transaction
 #   5. Submit Mint transaction
 #   6. Submit SetAuthority (revoke) transaction
-#   7. Run unit tests to verify authority logic (49 tests)
+#   7. Run unit tests to verify authority logic (60 tests)
 set -euo pipefail
 
 
@@ -66,11 +66,11 @@ lgs wallet topup 2>&1 | grep -E "complete|funded|Address" || true
 echo "      Wallet funded."
 
 echo "[3/7] Creating token accounts..."
-DEF_RESULT=$(lgs wallet -- account new public 2>&1)
+DEF_RESULT=$(lgs wallet -- account new --public 2>&1)
 DEF_ID=$(echo "$DEF_RESULT" | grep -oE '[0-9a-f]{64}' | head -1)
-SUPPLY_RESULT=$(lgs wallet -- account new public 2>&1)
+SUPPLY_RESULT=$(lgs wallet -- account new --public 2>&1)
 SUPPLY_ID=$(echo "$SUPPLY_RESULT" | grep -oE '[0-9a-f]{64}' | head -1)
-RECIPIENT_RESULT=$(lgs wallet -- account new public 2>&1)
+RECIPIENT_RESULT=$(lgs wallet -- account new --public 2>&1)
 RECIPIENT_ID=$(echo "$RECIPIENT_RESULT" | grep -oE '[0-9a-f]{64}' | head -1)
 echo "      Definition account: $DEF_ID"
 echo "      Supply account:     $SUPPLY_ID"
@@ -84,7 +84,7 @@ ${TIMEOUT:+$TIMEOUT 30} "$SPEL" --idl "$IDL" --program "$TOKEN_BIN" \
   --holding-target-account "$SUPPLY_ID" \
   --name "DemoCoin" \
   --initial-supply 1000000 \
-  --mint-authority "$DEF_ID" 2>&1 || true
+  --mint-authority "$DEF_ID"
 echo "      Token 'DemoCoin' submitted. Initial supply: 1,000,000"
 
 sleep 2
@@ -95,7 +95,7 @@ ${TIMEOUT:+$TIMEOUT 30} "$SPEL" --idl "$IDL" --program "$TOKEN_BIN" \
   -- mint \
   --definition-account "$DEF_ID" \
   --user-holding-account "$RECIPIENT_ID" \
-  --amount-to-mint 500000 2>&1 || true
+  --amount-to-mint 500000
 echo "      Mint transaction submitted. New total supply: 1,500,000"
 
 sleep 2
@@ -105,7 +105,7 @@ NSSA_WALLET_HOME_DIR="$WALLET_DIR" \
 ${TIMEOUT:+$TIMEOUT 30} "$SPEL" --idl "$IDL" --program "$TOKEN_BIN" \
   -- set-authority \
   --definition-account "$DEF_ID" \
-  --new-authority none 2>&1 || true
+  --new-authority none
 echo "      Authority revoked. Supply permanently fixed at 1,500,000"
 
 sleep 2