refactor: IT create token in constructor

pallets/api/src/fungibles/mod.rs

@@ -303,7 +303,7 @@ pub mod pallet {
 		///
 		/// # Parameter
 		/// - `value` - An instance of `Read<T>`, which specifies the type of state query and
-		/// 		  the associated parameters.
+		///   the associated parameters.
 		pub fn read_state(value: Read<T>) -> Vec<u8> {
 			use Read::*;
 

pop-api/integration-tests/contracts/create_token_in_constructor/lib.rs

@@ -22,8 +22,9 @@ mod create_token_in_constructor {
 		#[ink(constructor, payable)]
 		pub fn new(id: AssetId, min_balance: Balance) -> Result<Self> {
 			let contract = Self { id };
-			let account = contract.env().account_id();
-			api::create(id, account, min_balance)?;
+			// AccountId of the contract which will be set to the owner of the fungible token.
+			let owner = contract.env().account_id();
+			api::create(id, owner, min_balance)?;
 			Ok(contract)
 		}
 

pop-api/integration-tests/src/fungibles/mod.rs

@@ -358,8 +358,15 @@ fn instantiate_and_create_fungible_works() {
 		let _ = env_logger::try_init();
 		let contract =
 			"contracts/create_token_in_constructor/target/ink/create_token_in_constructor.wasm";
-		let addr = instantiate_and_create_fungible(contract, ASSET_ID, 1);
-		assert_eq!(asset_exists(addr, ASSET_ID), Ok(Assets::asset_exists(ASSET_ID)));
+		// Asset already exists.
+		create_asset(ALICE, 0, 1);
+		assert_eq!(
+			instantiate_and_create_fungible(contract, 0, 1),
+			Err(Module { index: 52, error: 5 })
+		);
+		// Successfully create an asset when instantiating the contract.
+		assert_ok!(instantiate_and_create_fungible(contract, ASSET_ID, 1));
+		assert!(Assets::asset_exists(ASSET_ID));
 	});
 }
 

pop-api/integration-tests/src/fungibles/utils.rs

@@ -310,7 +310,7 @@ pub(super) fn instantiate_and_create_fungible(
 	contract: &str,
 	asset_id: AssetId,
 	min_balance: Balance,
-) -> AccountId32 {
+) -> Result<(), Error> {
 	let function = function_selector("new");
 	let input = [function, asset_id.encode(), min_balance.encode()].concat();
 	let (wasm_binary, _) =
@@ -327,7 +327,8 @@ pub(super) fn instantiate_and_create_fungible(
 		CollectEvents::Skip,
 	)
 	.result
-	.unwrap();
-	assert!(!result.result.did_revert(), "deploying contract reverted {:?}", result);
-	result.account_id
+	.expect("should work")
+	.result;
+	decoded::<Result<(), Error>>(result.clone())
+		.unwrap_or_else(|_| panic!("Contract reverted: {:?}", result))
 }