From 61ad26c17a0585f7562fe2d5c1573ec2e7d1e946 Mon Sep 17 00:00:00 2001
From: kayibal <alan@propellerheads.xyz>
Date: Wed, 3 Sep 2025 12:29:52 +0100
Subject: [PATCH] feat: Add previous_value field to ContractSlot

This change is required by the DCI to properly detect potential address changes (retriggers) on packed storage slots.
---
 substreams/crates/tycho-substreams/src/models.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/substreams/crates/tycho-substreams/src/models.rs b/substreams/crates/tycho-substreams/src/models.rs
index 81cdce1..f7d38bd 100644
--- a/substreams/crates/tycho-substreams/src/models.rs
+++ b/substreams/crates/tycho-substreams/src/models.rs
@@ -72,7 +72,7 @@ impl TransactionChangesBuilder {
     }
 
     /// Unique contract/account addresses that have been changed so far.
-    pub fn changed_contracts(&self) -> impl Iterator<Item=&[u8]> {
+    pub fn changed_contracts(&self) -> impl Iterator<Item = &[u8]> {
         self.contract_changes
             .keys()
             .map(|k| k.as_slice())