diff --git a/contracts/name-minter/schema/name-minter.json b/contracts/name-minter/schema/name-minter.json
index 886cfa02..a7b7ce15 100644
--- a/contracts/name-minter/schema/name-minter.json
+++ b/contracts/name-minter/schema/name-minter.json
@@ -156,16 +156,6 @@
             "properties": {
               "address": {
                 "type": "string"
-              },
-              "whitelist_type": {
-                "anyOf": [
-                  {
-                    "$ref": "#/definitions/WhitelistType"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
               }
             },
             "additionalProperties": false
@@ -188,16 +178,6 @@
             "properties": {
               "address": {
                 "type": "string"
-              },
-              "whitelist_type": {
-                "anyOf": [
-                  {
-                    "$ref": "#/definitions/WhitelistType"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
               }
             },
             "additionalProperties": false
@@ -252,13 +232,6 @@
       "Uint64": {
         "description": "A thin wrapper around u64 that is using strings for JSON encoding/decoding, such that the full u64 range can be used for clients that convert JSON numbers to floats, like JavaScript and jq.\n\n# Examples\n\nUse `from` to create instances of this and `u64` to get the value out:\n\n``` # use cosmwasm_std::Uint64; let a = Uint64::from(42u64); assert_eq!(a.u64(), 42);\n\nlet b = Uint64::from(70u32); assert_eq!(b.u64(), 70); ```",
         "type": "string"
-      },
-      "WhitelistType": {
-        "type": "string",
-        "enum": [
-          "Updatable",
-          "Flatrate"
-        ]
       }
     }
   },
diff --git a/contracts/name-minter/src/contract.rs b/contracts/name-minter/src/contract.rs
index de228354..2812cd80 100644
--- a/contracts/name-minter/src/contract.rs
+++ b/contracts/name-minter/src/contract.rs
@@ -177,8 +177,6 @@ pub fn execute_mint_and_list(
         .transpose()?
         .unwrap_or(None);
 
-    println!("discount: {:?}", discount);
-
     let price = validate_payment(name.len(), &info, params.base_price.u128(), discount)?;
     if price.clone().is_some() {
         charge_fees(
@@ -343,10 +341,14 @@ fn validate_payment(
     })
     .into();
 
-    if discount.is_some() && amount.ge(&Uint128::from(discount.unwrap())) {
-        amount = amount
-            .checked_sub(Uint128::from(discount.unwrap()))
-            .unwrap();
+    if let Some(discount_value) = discount {
+        let discount_amount = Uint128::from(discount_value);
+        // TODO: should we handle the case where discount > amount (eg 1,000 discount but buying a 100 name)
+        if amount.ge(&discount_amount) {
+            amount = amount
+                .checked_sub(discount_amount)
+                .map_err(|_| StdError::generic_err("invalid discount amount"))?;
+        }
     }
 
     if amount.is_zero() {
diff --git a/contracts/whitelist-updatable-flatrate/src/contract.rs b/contracts/whitelist-updatable-flatrate/src/contract.rs
index 9a4751b3..e48bb21b 100644
--- a/contracts/whitelist-updatable-flatrate/src/contract.rs
+++ b/contracts/whitelist-updatable-flatrate/src/contract.rs
@@ -135,11 +135,7 @@ pub fn execute_add_addresses(
 
     for address in addresses.into_iter() {
         let addr = deps.api.addr_validate(&address.clone())?;
-        if WHITELIST.has(deps.storage, addr.clone()) {
-            return Err(ContractError::AddressAlreadyExists {
-                addr: addr.to_string(),
-            });
-        } else {
+        if !WHITELIST.has(deps.storage, addr.clone()) {
             WHITELIST.save(deps.storage, addr, &0u32)?;
             count += 1;
         }
diff --git a/contracts/whitelist-updatable-flatrate/src/integration_tests.rs b/contracts/whitelist-updatable-flatrate/src/integration_tests.rs
index 710a5ff1..0392f1e2 100644
--- a/contracts/whitelist-updatable-flatrate/src/integration_tests.rs
+++ b/contracts/whitelist-updatable-flatrate/src/integration_tests.rs
@@ -244,7 +244,7 @@ mod tests {
             ],
         };
         let res = app.execute_contract(Addr::unchecked(OTHER_ADMIN), wl_addr.clone(), &msg, &[]);
-        assert!(res.is_err());
+        assert!(res.is_ok());
         let res: bool = app
             .wrap()
             .query_wasm_smart(
@@ -254,12 +254,12 @@ mod tests {
                 }),
             )
             .unwrap();
-        assert!(!res);
+        assert!(res);
         let res: u64 = app
             .wrap()
             .query_wasm_smart(&wl_addr, &(QueryMsg::AddressCount {}))
             .unwrap();
-        assert_eq!(res, 5);
+        assert_eq!(res, 6);
         let msg = ExecuteMsg::AddAddresses {
             addresses: vec!["addr0007".to_string(), "addr0006".to_string()],
         };