Implement mint fee collection deduct correctly from protocol and coll…

…ection owner

pallets/nft/src/tests.rs

@@ -1090,3 +1090,43 @@ fn pre_signed_mint_should_work_with_only_account() {
 		assert_eq!(OrmlNft::tokens_by_owner((account(2), 0, 0)), ());
 	})
 }
+
+#[test]
+fn pre_signed_mint_should_collect_fee_with_mint_price() {
+	ExtBuilder::default().build().execute_with(|| {
+		let alice = account(1);
+		let user_1_pair = sp_core::sr25519::Pair::from_string("//Alice", None).unwrap();
+		let user_1_signer = MultiSigner::Sr25519(user_1_pair.public());
+		let user_1 = user_1_signer.clone().into_account();
+		let mint_data: PreSignedMint<ClassId, TokenId, AccountId, Balance> = PreSignedMint {
+			class_id: 0,
+			attributes: test_attributes(1),
+			metadata: vec![],
+			only_account: None,
+			mint_price: Some(50),
+			token_id: None,
+		};
+		let message = Encode::encode(&mint_data);
+		let signature = MultiSignature::Sr25519(user_1_pair.sign(&message));
+		assert_ok!(Balances::transfer(
+			RuntimeOrigin::signed(alice.clone()),
+			user_1.clone(),
+			100
+		));
+		assert_eq!(Balances::free_balance(user_1.clone()), 100);
+		assert_eq!(Balances::free_balance(alice.clone()), 99900);
+
+		init_test_nft(RuntimeOrigin::signed(user_1.clone()));
+		assert_eq!(Balances::free_balance(user_1.clone()), 96); // Deduct fee
+
+		assert_ok!(Nft::mint_pre_signed(
+			RuntimeOrigin::signed(alice.clone()),
+			Box::new(mint_data.clone()),
+			signature.clone(),
+			user_1.clone(),
+		));
+		assert_eq!(Balances::free_balance(user_1.clone()), 146); // Get 50 mint fees from NFT
+		assert_eq!(Balances::free_balance(alice.clone()), 99849); // Pay 1 mint fee for protocol and 50 mint price = 99900 - 51
+		assert_eq!(OrmlNft::tokens_by_owner((account(2), 0, 0)), ());
+	})
+}