From dd8cb5db86a944b7abb4aaef5318b10dbe6eca8b Mon Sep 17 00:00:00 2001
From: s0me0ne-unkn0wn <48632512+s0me0ne-unkn0wn@users.noreply.github.com>
Date: Wed, 22 May 2024 15:20:25 +0200
Subject: [PATCH] Filter out credit purchase call (#312)
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This PR aims to filter out credit purchase calls until the credit system
is implemented. Otherwise, users may have a chance of locking their
funds forever on purchased credits they cannot use.

Closes paritytech/polkadot-sdk#4454

---------

Co-authored-by: Bastian Köcher <git@kchr.de>
---
 CHANGELOG.md                                        |  1 +
 .../coretime/coretime-kusama/src/lib.rs             | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c85b89f7a1..3a90bc1708 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Kusama chains: allow arbitrary XCM execution ([polkadot-fellows/runtimes#261](https://github.com/polkadot-fellows/runtimes/pull/261))
 - Allow everything through XCM SafeCallFilter ([polkadot-fellows/runtimes#285](https://github.com/polkadot-fellows/runtimes/pull/285))
+- Disable Coretime credit purchasing until we have the credit system implemented ([polkadot-fellows/runtimes#312](https://github.com/polkadot-fellows/runtimes/pull/312))
 
 ### Added
 
diff --git a/system-parachains/coretime/coretime-kusama/src/lib.rs b/system-parachains/coretime/coretime-kusama/src/lib.rs
index 2236d41a0f..e6b293b9a7 100644
--- a/system-parachains/coretime/coretime-kusama/src/lib.rs
+++ b/system-parachains/coretime/coretime-kusama/src/lib.rs
@@ -37,7 +37,8 @@ use frame_support::{
 	genesis_builder_helper::{build_config, create_default_config},
 	parameter_types,
 	traits::{
-		ConstBool, ConstU32, ConstU64, ConstU8, EitherOfDiverse, InstanceFilter, TransformOrigin,
+		ConstBool, ConstU32, ConstU64, ConstU8, Contains, EitherOfDiverse, EverythingBut,
+		InstanceFilter, TransformOrigin,
 	},
 	weights::{ConstantMultiplier, Weight},
 	PalletId,
@@ -170,9 +171,19 @@ parameter_types! {
 	pub const SS58Prefix: u8 = 2;
 }
 
+/// Filter out credit purchase calls until the credit system is implemented. Otherwise, users
+/// may have chance of locking their funds forever on purchased credits they cannot use.
+pub struct IsBrokerCreditPurchaseCall;
+impl Contains<RuntimeCall> for IsBrokerCreditPurchaseCall {
+	fn contains(c: &RuntimeCall) -> bool {
+		matches!(c, RuntimeCall::Broker(pallet_broker::Call::purchase_credit { .. }))
+	}
+}
+
 // Configure FRAME pallets to include in runtime.
 #[derive_impl(frame_system::config_preludes::ParaChainDefaultConfig as frame_system::DefaultConfig)]
 impl frame_system::Config for Runtime {
+	type BaseCallFilter = EverythingBut<IsBrokerCreditPurchaseCall>;
 	/// The identifier used to distinguish between accounts.
 	type AccountId = AccountId;
 	/// The nonce type for storing how many extrinsics an account has signed.