[contracts] Stabilize "seal0" is_contract and caller_is_origin (#10971)

* stabilize `seal_is_contract`

* stabilize `seal_caller_is_origin`

substrate/frame/contracts/src/benchmarking/mod.rs

@@ -409,7 +409,7 @@ benchmarks! {
 		let code = WasmModule::<T>::from(ModuleDefinition {
 			memory: Some(ImportedMemory::max::<T>()),
 			imported_functions: vec![ImportedFunction {
-				module: "__unstable__",
+				module: "seal0",
 				name: "seal_is_contract",
 				params: vec![ValueType::I32],
 				return_type: Some(ValueType::I32),
@@ -441,7 +441,7 @@ benchmarks! {
 		let code = WasmModule::<T>::from(ModuleDefinition {
 			memory: Some(ImportedMemory::max::<T>()),
 			imported_functions: vec![ImportedFunction {
-				module: "__unstable__",
+				module: "seal0",
 				name: "seal_caller_is_origin",
 				params: vec![],
 				return_type: Some(ValueType::I32),

substrate/frame/contracts/src/wasm/mod.rs

@@ -2321,12 +2321,11 @@ mod tests {
 	}
 
 	#[test]
-	#[cfg(feature = "unstable-interface")]
 	fn is_contract_works() {
 		const CODE_IS_CONTRACT: &str = r#"
 ;; This runs `is_contract` check on zero account address
 (module
-	(import "__unstable__" "seal_is_contract" (func $seal_is_contract (param i32) (result i32)))
+	(import "seal0" "seal_is_contract" (func $seal_is_contract (param i32) (result i32)))
 	(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
 	(import "env" "memory" (memory 1 1))
 
@@ -2362,12 +2361,11 @@ mod tests {
 	}
 
 	#[test]
-	#[cfg(feature = "unstable-interface")]
 	fn caller_is_origin_works() {
 		const CODE_CALLER_IS_ORIGIN: &str = r#"
 ;; This runs `caller_is_origin` check on zero account address
 (module
-	(import "__unstable__" "seal_caller_is_origin" (func $seal_caller_is_origin (result i32)))
+	(import "seal0" "seal_caller_is_origin" (func $seal_caller_is_origin (result i32)))
 	(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
 	(import "env" "memory" (memory 1 1))
 

substrate/frame/contracts/src/wasm/runtime.rs

@@ -143,10 +143,8 @@ pub enum RuntimeCosts {
 	/// Weight of calling `seal_caller`.
 	Caller,
 	/// Weight of calling `seal_is_contract`.
-	#[cfg(feature = "unstable-interface")]
 	IsContract,
 	/// Weight of calling `seal_caller_is_origin`.
-	#[cfg(feature = "unstable-interface")]
 	CallerIsOrigin,
 	/// Weight of calling `seal_address`.
 	Address,
@@ -236,9 +234,7 @@ impl RuntimeCosts {
 			CopyFromContract(len) => s.return_per_byte.saturating_mul(len.into()),
 			CopyToContract(len) => s.input_per_byte.saturating_mul(len.into()),
 			Caller => s.caller,
-			#[cfg(feature = "unstable-interface")]
 			IsContract => s.is_contract,
-			#[cfg(feature = "unstable-interface")]
 			CallerIsOrigin => s.caller_is_origin,
 			Address => s.address,
 			GasLeft => s.gas_left,
@@ -1372,7 +1368,7 @@ define_env!(Env, <E: Ext>,
 	//   Should be decodable as an `T::AccountId`. Traps otherwise.
 	//
 	// Returned value is a u32-encoded boolean: (0 = false, 1 = true).
-	[__unstable__] seal_is_contract(ctx, account_ptr: u32) -> u32 => {
+	[seal0] seal_is_contract(ctx, account_ptr: u32) -> u32 => {
 		ctx.charge_gas(RuntimeCosts::IsContract)?;
 		let address: <<E as Ext>::T as frame_system::Config>::AccountId =
 			ctx.read_sandbox_memory_as(account_ptr)?;
@@ -1390,7 +1386,7 @@ define_env!(Env, <E: Ext>,
 	// and `false` indicates that the caller is another contract.
 	//
 	// Returned value is a u32-encoded boolean: (0 = false, 1 = true).
-	[__unstable__] seal_caller_is_origin(ctx) -> u32 => {
+	[seal0] seal_caller_is_origin(ctx) -> u32 => {
 		ctx.charge_gas(RuntimeCosts::CallerIsOrigin)?;
 		Ok(ctx.ext.caller_is_origin() as u32)
 	},