From b6d21fccd50c9bb052e2d2b750155c4a9ceca3ad Mon Sep 17 00:00:00 2001
From: Marian Vanderka <vanderka.marian@gmail.com>
Date: Thu, 5 Dec 2024 14:29:04 +0100
Subject: [PATCH] adds a check that only single ferry can happen on a deposit
 request

---
 pallets/rolldown/src/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pallets/rolldown/src/lib.rs b/pallets/rolldown/src/lib.rs
index 6c598a7e9..2a6d769f9 100644
--- a/pallets/rolldown/src/lib.rs
+++ b/pallets/rolldown/src/lib.rs
@@ -525,6 +525,8 @@ pub mod pallet {
 		UninitializedChainId,
 		// Asset can be withdrawn only to sender's address
 		NontransferableToken,
+		// the deposit was already ferried
+		AlreadyFerried,
 	}
 
 	#[cfg(feature = "runtime-benchmarks")]
@@ -1843,6 +1845,11 @@ impl<T: Config> Pallet<T> {
 			return Err(Error::<T>::AlreadyExecuted);
 		}
 
+		ensure!(
+			!FerriedDeposits::<T>::contains_key((chain, deposit_hash)),
+			Error::<T>::AlreadyFerried
+		);
+
 		let amount = deposit
 			.amount
 			.checked_sub(deposit.ferryTip)