From 5255093d1cd6ae86c8defe486f890cd17b81519a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1s=20Gr=C3=BCner?=
 <47506558+MegaRedHand@users.noreply.github.com>
Date: Wed, 10 Jun 2026 13:20:27 -0300
Subject: [PATCH] refactor(types): derive MultiMessageAggregateError with
 thiserror

---
 crates/common/types/src/block.rs | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/crates/common/types/src/block.rs b/crates/common/types/src/block.rs
index 788dd845..7a71140e 100644
--- a/crates/common/types/src/block.rs
+++ b/crates/common/types/src/block.rs
@@ -77,22 +77,13 @@ impl MultiMessageAggregate {
 }
 
 /// Errors returned when constructing a [`MultiMessageAggregate`].
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, thiserror::Error)]
 pub enum MultiMessageAggregateError {
     /// Proof bytes exceed `ByteList512KiB`'s cap.
+    #[error("proof {0} bytes exceeds 512 KiB cap")]
     ProofTooLarge(usize),
 }
 
-impl core::fmt::Display for MultiMessageAggregateError {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        match self {
-            Self::ProofTooLarge(n) => write!(f, "proof {n} bytes exceeds 512 KiB cap"),
-        }
-    }
-}
-
-impl std::error::Error for MultiMessageAggregateError {}
-
 // ============================================================================
 // Type-1 multi-signature
 // ============================================================================