fix: update insufficent funds for fee error (#944)

Author: erictaylor

src/vms/pvm/etna-builder/spend-reducers/handleFeeAndChange.test.ts

@@ -22,7 +22,7 @@ describe('handleFeeAndChange', () => {
         testContext,
       ),
     ).toThrow(
-      `Insufficient funds: provided UTXOs need 4 more nAVAX (asset id: ${testContext.avaxAssetID})`,
+      `Insufficient funds: provided UTXOs need 4 more unlocked nAVAX (asset id: ${testContext.avaxAssetID}) to cover fee.`,
     );
   });
 

src/vms/pvm/etna-builder/spend-reducers/handleFeeAndChange.ts

@@ -19,11 +19,12 @@ const canPayFeeAndNeedsChange = (
   context: Context,
 ): boolean => {
   // Not enough funds to pay the fee.
+  // NOTE: Time locked UTXOs can not be used to pay fees.
   if (excessAVAX < requiredFee) {
     throw new Error(
       `Insufficient funds: provided UTXOs need ${
         requiredFee - excessAVAX
-      } more nAVAX (asset id: ${context.avaxAssetID})`,
+      } more unlocked nAVAX (asset id: ${context.avaxAssetID}) to cover fee.`,
     );
   }
 

src/vms/pvm/etna-builder/spend-reducers/useSpendableLockedUTXOs.ts

@@ -50,6 +50,11 @@ export const getUsableUTXOsFilter =
     return true;
   };
 
+/**
+ * Reducer function that is responsible for spending UTXOs that are locked and stakeable.
+ *
+ * NOTE: Time locked UTXOs can not be used to pay fees.
+ */
 export const useSpendableLockedUTXOs: SpendReducerFunction = (
   state,
   spendHelper,