From f709083425cdbe832546ab5fa66b76df433431cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20Ludue=C3=B1a?=
 <luduena.nicolas.victorio@gmail.com>
Date: Wed, 28 Jan 2026 11:51:49 -0300
Subject: [PATCH 1/2] feat: configure max dump history

---
 crates/core/src/config.rs |  1 +
 src/serve/grpc/mod.rs     |  4 +++-
 src/serve/grpc/sync.rs    | 19 +++++++++++--------
 3 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/crates/core/src/config.rs b/crates/core/src/config.rs
index 0ad6241c6..fc12f6353 100644
--- a/crates/core/src/config.rs
+++ b/crates/core/src/config.rs
@@ -561,6 +561,7 @@ pub struct GrpcConfig {
     pub listen_address: String,
     pub tls_client_ca_root: Option<PathBuf>,
     pub permissive_cors: Option<bool>,
+    pub max_dump_history_items: Option<u32>,
 }
 
 #[derive(Deserialize, Serialize, Clone)]
diff --git a/src/serve/grpc/mod.rs b/src/serve/grpc/mod.rs
index 2ac6b2644..2e496e2ba 100644
--- a/src/serve/grpc/mod.rs
+++ b/src/serve/grpc/mod.rs
@@ -28,8 +28,10 @@ where
 
     async fn run(cfg: Self::Config, domain: D, cancel: C) -> Result<(), ServeError> {
         let addr = cfg.listen_address.parse().unwrap();
+        let max_history_items = cfg.max_dump_history_items.unwrap_or(100);
 
-        let sync_service = sync::SyncServiceImpl::new(domain.clone(), cancel.clone());
+        let sync_service =
+            sync::SyncServiceImpl::new(domain.clone(), cancel.clone(), max_history_items);
         let sync_service = u5c::sync::sync_service_server::SyncServiceServer::new(sync_service);
 
         let query_service = query::QueryServiceImpl::new(domain.clone());
diff --git a/src/serve/grpc/sync.rs b/src/serve/grpc/sync.rs
index 179920012..f14b30048 100644
--- a/src/serve/grpc/sync.rs
+++ b/src/serve/grpc/sync.rs
@@ -10,8 +10,6 @@ use tonic::{Request, Response, Status};
 
 use crate::prelude::*;
 
-const MAX_DUMP_HISTORY_ITEMS: u32 = 100;
-
 fn u5c_to_chain_point(block_ref: u5c::sync::BlockRef) -> Result<ChainPoint, Status> {
     Ok(ChainPoint::Specific(
         block_ref.slot,
@@ -97,6 +95,7 @@ where
     domain: D,
     mapper: interop::Mapper<D>,
     cancel: C,
+    max_history_items: u32,
 }
 
 impl<D, C> SyncServiceImpl<D, C>
@@ -104,13 +103,14 @@ where
     D: Domain + LedgerContext,
     C: CancelToken,
 {
-    pub fn new(domain: D, cancel: C) -> Self {
+    pub fn new(domain: D, cancel: C, max_history_items: u32) -> Self {
         let mapper = Mapper::new(domain.clone());
 
         Self {
             domain,
             mapper,
             cancel,
+            max_history_items,
         }
     }
 }
@@ -186,9 +186,10 @@ where
 
         let from = msg.start_token.map(|x| x.slot);
 
-        if msg.max_items > MAX_DUMP_HISTORY_ITEMS {
+        if msg.max_items > self.max_history_items {
             return Err(Status::invalid_argument(format!(
-                "max_items must be less than or equal to {MAX_DUMP_HISTORY_ITEMS}"
+                "max_items must be less than or equal to {}",
+                self.max_history_items
             )));
         }
 
@@ -288,7 +289,7 @@ mod tests {
         use dolos_core::ImportExt;
         domain.import_blocks(batch).unwrap();
 
-        let service = SyncServiceImpl::new(domain, cancel);
+        let service = SyncServiceImpl::new(domain, cancel, 100);
 
         let mut start_token = None;
 
@@ -331,11 +332,13 @@ mod tests {
         let domain = ToyDomain::new(None, None);
         let cancel = CancelTokenImpl::default();
 
-        let service = SyncServiceImpl::new(domain, cancel);
+        let max_configurable = 10;
+
+        let service = SyncServiceImpl::new(domain, cancel, max_configurable);
 
         let request = u5c::sync::DumpHistoryRequest {
             start_token: None,
-            max_items: MAX_DUMP_HISTORY_ITEMS + 1,
+            max_items: max_configurable + 1,
             field_mask: None,
         };
 

From 2b6ca208b65442a84de23e9c00f1f97e88814104 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20Ludue=C3=B1a?=
 <luduena.nicolas.victorio@gmail.com>
Date: Wed, 28 Jan 2026 11:58:35 -0300
Subject: [PATCH 2/2] fix: missing config on dolos init

---
 src/bin/dolos/init.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/bin/dolos/init.rs b/src/bin/dolos/init.rs
index 1009469d5..e394ce413 100644
--- a/src/bin/dolos/init.rs
+++ b/src/bin/dolos/init.rs
@@ -310,6 +310,7 @@ impl ConfigEditor {
                     listen_address: "[::]:50051".into(),
                     tls_client_ca_root: None,
                     permissive_cors: Some(true),
+                    max_dump_history_items: None,
                 }
                 .into();
             } else {