From 3def18a6dc97e4f46b912b084251d6cf8744c004 Mon Sep 17 00:00:00 2001
From: kozyrevdev <73348153+kozyrevdev@users.noreply.github.com>
Date: Thu, 25 Nov 2021 18:31:17 +0000
Subject: [PATCH] Merge pull request #245 from UniqueNetwork/CORE-243


Core 243

---
--- a/pallets/fungible/src/lib.rs
+++ b/pallets/fungible/src/lib.rs
@@ -285,7 +285,11 @@
 		spender: &T::CrossAccountId,
 		amount: u128,
 	) {
-		<Allowance<T>>::insert((collection.id, owner, spender), amount);
+		if amount == 0 {
+			<Allowance<T>>::remove((collection.id, owner, spender));
+		} else {
+			<Allowance<T>>::insert((collection.id, owner, spender), amount);
+		}
 
 		collection.log_infallible(ERC20Events::Approval {
 			owner: *owner.as_eth(),
--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -467,7 +467,11 @@
 		token: TokenId,
 		amount: u128,
 	) {
-		<Allowance<T>>::insert((collection.id, token, sender, spender), amount);
+		if amount == 0 {
+			<Allowance<T>>::remove((collection.id, token, sender, spender));
+		} else {
+			<Allowance<T>>::insert((collection.id, token, sender, spender), amount);
+		}
 		// TODO: ERC20 approval event
 		<PalletCommon<T>>::deposit_event(CommonEvent::Approved(
 			collection.id,

-- 
gitstuff