circlefin · msheth-circle · Apr 10, 2026 · Apr 10, 2026
diff --git a/crates/malachite-app/src/handlers/restream_proposal.rs b/crates/malachite-app/src/handlers/restream_proposal.rs
@@ -32,9 +32,9 @@ use crate::store::repositories::UndecidedBlocksRepository;
 /// Handles the `RestreamProposal` message from the consensus engine.
 ///
 /// This is called when the consensus engine requests to restream a proposal for a specific height and round.
-/// If a valid round is provided, the application first fetches the block from the valid round,
-/// updates its round to the new round, and stores it. Then, it fetches the
-/// block for the specified height and round, streams the proposal parts, and sends them over the network.
+/// The block is looked up by height and block hash (ignoring round), so it will be found
+/// regardless of which round it was originally stored under. The block's round and valid_round
+/// are updated to match the current proposal context before restreaming.
 ///
 /// ## Errors
 /// - If no block is found for the specified height and round
@@ -107,18 +107,17 @@ async fn get_block_to_restream(
     valid_round: Round,
     block_hash: BlockHash,
 ) -> eyre::Result<Option<ConsensusBlock>> {
-    if valid_round.is_defined()
-        && let Some(mut block) = undecided_blocks
-            .get(height, valid_round, block_hash)
-            .await
-            .wrap_err_with(|| {
-                format!(
-                    "Failed to fetch block from valid round for restreaming it \
-                    (height={height}, valid_round={valid_round}, block_hash={block_hash})"
-                )
-            })?
-    {
-        // Update the block for the new round and store it
+    let block = undecided_blocks
+        .get_first(height, block_hash)
+        .await
+        .wrap_err_with(|| {
+            format!(
+                "Failed to fetch block for restreaming \
+                 (height={height}, round={round}, block_hash={block_hash})"
+            )
+        })?;
+
+    if let Some(mut block) = block {
         block.round = round;
         block.valid_round = valid_round;
 
@@ -127,24 +126,14 @@ async fn get_block_to_restream(
             .await
             .wrap_err_with(|| {
                 format!(
-                "Failed to store updated undecided block from valid round before restreaming it \
-                (height={height}, valid_round={valid_round}, block_hash={block_hash})"
-            )
-            })?;
-
-        Ok(Some(block))
-    } else {
-        let block_to_restream = undecided_blocks
-            .get(height, round, block_hash)
-            .await
-            .wrap_err_with(|| {
-                format!(
-                    "Failed to fetch block from round for restreaming it \
+                    "Failed to store updated block before restreaming \
                      (height={height}, round={round}, block_hash={block_hash})"
                 )
             })?;
 
-        Ok(block_to_restream)
+        Ok(Some(block))
+    } else {
+        Ok(None)
     }
 }
 
@@ -179,25 +168,22 @@ mod tests {
     }
 
     #[tokio::test]
-    async fn get_block_from_valid_round_and_store_update() {
+    async fn get_block_found_and_updated() {
         let mut mock_repo = MockUndecidedBlocksRepository::new();
 
         let height = Height::new(10);
-        let round = Round::new(5); // The new round we are proposing in
-        let valid_round = Round::new(3); // The previous round where we saw the block
+        let round = Round::new(5);
+        let valid_round = Round::new(3);
         let block_hash = BlockHash::default();
 
-        // Original block proposed in round 3
-        let original_block = create_dummy_block(height, valid_round, Round::Nil);
+        let original_block = create_dummy_block(height, Round::new(0), Round::Nil);
 
-        // Expectation: Fetch from valid_round (3)
         mock_repo
-            .expect_get()
-            .with(eq(height), eq(valid_round), eq(block_hash))
+            .expect_get_first()
+            .with(eq(height), eq(block_hash))
             .times(1)
-            .returning(move |_, _, _| Ok(Some(original_block.clone())));
+            .returning(move |_, _| Ok(Some(original_block.clone())));
 
-        // Expectation: Store the block updated with the NEW round (5) and valid_round (3)
         mock_repo
             .expect_store()
             .withf(move |b| b.round == round && b.valid_round == valid_round)
@@ -207,79 +193,30 @@ mod tests {
         let result =
             get_block_to_restream(&mock_repo, height, round, valid_round, block_hash).await;
 
-        assert!(result.is_ok());
-        let block = result.unwrap();
-        assert!(block.is_some());
-
-        let b = block.unwrap();
-        assert_eq!(b.round, round); // Ensure returned block has updated round
-        assert_eq!(b.valid_round, valid_round);
-    }
-
-    #[tokio::test]
-    async fn get_block_no_valid_round_fetch_current() {
-        let mut mock_repo = MockUndecidedBlocksRepository::new();
-
-        let height = Height::new(10);
-        let round = Round::new(5);
-        let valid_round = Round::Nil; // No valid round
-        let block_hash = BlockHash::default();
-
-        // A block proposed for the first time at round 5, no valid round
-        let current_block = create_dummy_block(height, round, valid_round);
-
-        // Expectation: we are restreaming this block because we received it at round 5.
-        mock_repo
-            .expect_get()
-            .with(eq(height), eq(round), eq(block_hash))
-            .times(1)
-            .returning(move |_, _, _| Ok(Some(current_block.clone())));
-
-        // Expectation: Store should NOT be called
-        mock_repo.expect_store().times(0);
-
-        let result =
-            get_block_to_restream(&mock_repo, height, round, valid_round, block_hash).await;
-
-        assert!(result.is_ok());
-        assert_eq!(result.unwrap().unwrap().round, round);
+        let block = result.unwrap().expect("block should be found");
+        assert_eq!(block.round, round);
+        assert_eq!(block.valid_round, valid_round);
     }
 
     #[tokio::test]
-    async fn fallback_when_valid_round_block_missing() {
+    async fn get_block_not_found() {
         let mut mock_repo = MockUndecidedBlocksRepository::new();
 
         let height = Height::new(10);
         let round = Round::new(5);
         let valid_round = Round::new(3);
         let block_hash = BlockHash::default();
 
-        let block_at_current = create_dummy_block(height, round, valid_round);
-
-        // 1. First fetch at valid_round returns None
-        // The proposed value can be valid for the proposer but not for us.
-        mock_repo
-            .expect_get()
-            .with(eq(height), eq(valid_round), eq(block_hash))
-            .times(1)
-            .returning(|_, _, _| Ok(None));
-
-        // 2. Fallback: fetch at current round
-        // Since it was restreamed by the proposer, we have it as current's round value.
         mock_repo
-            .expect_get()
-            .with(eq(height), eq(round), eq(block_hash))
+            .expect_get_first()
+            .with(eq(height), eq(block_hash))
             .times(1)
-            .returning(move |_, _, _| Ok(Some(block_at_current.clone())));
-
-        // Store should NOT be called in the fallback path
-        mock_repo.expect_store().times(0);
+            .returning(|_, _| Ok(None));
 
         let result =
             get_block_to_restream(&mock_repo, height, round, valid_round, block_hash).await;
 
-        assert!(result.is_ok());
-        assert!(result.unwrap().is_some());
+        assert!(result.unwrap().is_none());
     }
 
     #[tokio::test]
@@ -290,8 +227,8 @@ mod tests {
         let valid_round = Round::Nil;
 
         mock_repo
-            .expect_get()
-            .returning(|_, _, _| Err(std::io::Error::other("DB connection failed")));
+            .expect_get_first()
+            .returning(|_, _| Err(std::io::Error::other("DB connection failed")));
 
         let result =
             get_block_to_restream(&mock_repo, height, round, valid_round, BlockHash::default())

diff --git a/crates/quake/src/infra/remote.rs b/crates/quake/src/infra/remote.rs
@@ -215,7 +215,7 @@ impl RemoteInfra {
             .map(|node| self.node_private_ip(node).map(String::as_str))
             .collect::<Result<Vec<_>>>()?;
 
-        let pssh_cmd = format!("./pssh.sh \"{cmd}\" {}", node_ips.join(" "));
+        let pssh_cmd = format!("./pssh.sh '{cmd}' {}", node_ips.join(" "));
         self.ssh_cc(&pssh_cmd, false)
             .wrap_err_with(|| format!("Failed to run '{cmd}' on {nodes:?}"))
     }

diff --git a/crates/quake/terraform/cc-data.yaml b/crates/quake/terraform/cc-data.yaml
@@ -39,23 +39,23 @@ write_files:
       # Usage: pssh.sh "command" ip1 ip2 ip3 ...
       # Executes command on all IPs in parallel, fails if any command fails.
       set -euo pipefail
-      CMD="$$1"
+      CMD="$1"
       shift
       SSH_OPTS="-o StrictHostKeyChecking=no -o LogLevel=ERROR"
       USER="${username}"
-      TMPDIR=$$(mktemp -d)
-      trap "rm -rf $$TMPDIR" EXIT
+      TMPDIR=$(mktemp -d)
+      trap "rm -rf $TMPDIR" EXIT
       i=0
-      for IP in "$$@"; do
-          (ssh $$SSH_OPTS $$USER@$$IP "$$CMD"; echo $$? > "$$TMPDIR/$$i") &
-          ((i++))
+      for IP in "$@"; do
+          (ssh $SSH_OPTS $USER@$IP "$CMD"; echo $? > "$TMPDIR/$i") &
+          i="$((i+1))"
       done
       wait
       FAILED=0
-      for f in "$$TMPDIR"/*; do
-          [ -f "$$f" ] && [ "$$(cat "$$f")" != "0" ] && FAILED=1
+      for f in "$TMPDIR"/*; do
+          [ -f "$f" ] && [ "$(cat "$f")" != "0" ] && FAILED=1
       done
-      exit $$FAILED
+      exit $FAILED
 runcmd:
 # Set up 4 GiB swap to prevent hard OOM kills (dd instead of fallocate for XFS compatibility)
   - dd if=/dev/zero of=/swapfile bs=1M count=4096

diff --git a/deployments/blockscout.yaml b/deployments/blockscout.yaml
@@ -0,0 +1,72 @@
+version: '3.9'
+
+name: blockscout
+
+services:
+  proxy:
+    image: nginx
+    container_name: proxy
+    extra_hosts:
+      - 'host.docker.internal:host-gateway'
+    volumes:
+      - "../deployments/monitoring/config-blockscout/proxy:/etc/nginx/templates:ro"
+    environment:
+      BACK_PROXY_PASS: ${BACK_PROXY_PASS:-http://backend:4000}
+      FRONT_PROXY_PASS: ${FRONT_PROXY_PASS:-http://frontend:3000}
+    ports:
+      - target: 80
+        published: 80
+
+  frontend:
+    image: ghcr.io/blockscout/frontend:${BLOCKSCOUT_FRONTEND_TAG:-latest}
+    pull_policy: always
+    restart: always
+    container_name: 'frontend'
+    volumes:
+      - ../deployments/monitoring/config-blockscout/frontend/.curlrc:/home/nextjs/.curlrc:ro
+    env_file:
+      -  ../deployments/monitoring/config-blockscout/frontend/frontend.env
+
+  backend:
+    image: ghcr.io/blockscout/${BLOCKSCOUT_REPO:-blockscout}:${BLOCKSCOUT_TAG:-latest}
+    pull_policy: always
+    restart: always
+    stop_grace_period: 5m
+    container_name: 'backend'
+    command: sh -c "bin/blockscout eval \"Elixir.Explorer.ReleaseTasks.create_and_migrate()\" && bin/blockscout start"
+    extra_hosts:
+      - 'host.docker.internal:host-gateway'
+    env_file:
+      -  ../deployments/monitoring/config-blockscout/backend.env
+    volumes:
+      - ../deployments/volumes/blockscout/logs/:/app/logs/
+      - ../deployments/volumes/blockscout/dets/:/app/dets/
+
+  db-init:
+    image: postgres:17
+    entrypoint:
+      - sh
+      - -c
+      - |
+        chown -R 2000:2000 /var/lib/postgresql/data
+
+  db:
+    image: postgres:17
+    user: 2000:2000
+    shm_size: 256m
+    restart: always
+    container_name: 'db'
+    command: postgres -c 'max_connections=200' -c 'client_connection_check_interval=60000'
+    environment:
+        POSTGRES_DB: 'blockscout'
+        POSTGRES_USER: 'blockscout'
+        POSTGRES_HOST_AUTH_METHOD: 'trust'
+    ports:
+      - target: 5432
+        published: 7432
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U blockscout -d blockscout"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
diff --git a/deployments/monitoring/config-blockscout/backend.env b/deployments/monitoring/config-blockscout/backend.env
@@ -0,0 +1,35 @@
+ETHEREUM_JSONRPC_VARIANT=geth
+DATABASE_URL=postgresql://blockscout:@db:5432/blockscout
+ETHEREUM_JSONRPC_TRANSPORT=http
+ETHEREUM_JSONRPC_DISABLE_ARCHIVE_BALANCES=false
+SECRET_KEY_BASE=0000000000000000000000000000000000000000000000000000000000000000
+PORT=4000
+COIN_NAME=
+COIN=
+DISABLE_MARKET=true
+POOL_SIZE=80
+POOL_SIZE_API=10
+ECTO_USE_SSL=false
+HEART_BEAT_TIMEOUT=30
+RELEASE_LINK=
+ADMIN_PANEL_ENABLED=false
+API_V1_READ_METHODS_DISABLED=false
+API_V1_WRITE_METHODS_DISABLED=false
+TXS_STATS_DAYS_TO_COMPILE_AT_INIT=10
+COIN_BALANCE_HISTORY_DAYS=90
+RE_CAPTCHA_DISABLED=false
+MICROSERVICE_SC_VERIFIER_TYPE=eth_bytecode_db
+MICROSERVICE_VISUALIZE_SOL2UML_ENABLED=true
+MICROSERVICE_VISUALIZE_SOL2UML_URL=http://visualizer:8050/
+MICROSERVICE_SIG_PROVIDER_ENABLED=true
+MICROSERVICE_SIG_PROVIDER_URL=http://sig-provider:8050/
+MICROSERVICE_ACCOUNT_ABSTRACTION_URL=http://user-ops-indexer:8050/
+DECODE_NOT_A_CONTRACT_CALLS=true
+ACCOUNT_CLOAK_KEY=
+ACCOUNT_ENABLED=false
+ACCOUNT_REDIS_URL=redis://redis-db:6379
+NFT_MEDIA_HANDLER_ENABLED=true
+NFT_MEDIA_HANDLER_REMOTE_DISPATCHER_NODE_MODE_ENABLED=true
+RELEASE_NODE=producer@172.18.0.4
+RELEASE_DISTRIBUTION=name
+RELEASE_COOKIE=secret_cookie
diff --git a/docs/installation.md b/docs/installation.md
@@ -27,7 +27,6 @@ https://github.com/circlefin/arc-node repository:
 git clone https://github.com/circlefin/arc-node.git
 cd arc-node
 git checkout $VERSION
-git submodule update --init --recursive
 ```
 
 `$VERSION` is a tag for a released version.
@@ -43,9 +42,17 @@ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 source ~/.cargo/env
 ```
 
+With Rust installed, install the dependencies for your operating system:
+
+- **Ubuntu:** `sudo apt-get install libclang-dev pkg-config build-essential`
+- **macOS:** `brew install llvm pkg-config`
+- **Windows:** `choco install llvm` or `winget install LLVM.LLVM`
+
+These are needed to build bindings for Arc node execution's database.
+
 **3. Build and install:**
 
-The following commands produce three Arc node binaries: 
+The following commands produce three Arc node binaries:
 `arc-node-execution`, `arc-node-consensus`, and `arc-snapshots`:
 
 ```sh
@@ -67,4 +74,3 @@ arc-snapshots --version
 arc-node-execution --version
 arc-node-consensus --version
 ```
-