Revert: removal of deprecated flashblock.enabled flag

crates/op-rbuilder/src/args/op.rs

@@ -95,6 +95,14 @@ fn expand_path(s: &str) -> Result<PathBuf> {
 /// Parameters for Flashblocks configuration
 #[derive(Debug, Clone, PartialEq, Eq, clap::Args)]
 pub struct FlashblocksArgs {
+    /// DEPRECATED. Will be removed in next minor release
+    #[arg(
+        long = "flashblocks.enabled",
+        default_value = "true",
+        env = "ENABLE_FLASHBLOCKS"
+    )]
+    pub enabled: bool,
+
     /// The port that we bind to for the websocket server that provides flashblocks
     #[arg(
         long = "flashblocks.port",

crates/op-rbuilder/src/builder/config.rs

@@ -5,6 +5,7 @@ use core::{
     net::{Ipv4Addr, SocketAddr},
     time::Duration,
 };
+use tracing::warn;
 
 /// Configuration values that are specific to the flashblocks builder.
 #[derive(Debug, Clone)]
@@ -86,6 +87,12 @@ impl TryFrom<OpRbuilderArgs> for FlashblocksConfig {
     type Error = eyre::Report;
 
     fn try_from(args: OpRbuilderArgs) -> Result<Self, Self::Error> {
+        if !args.flashblocks.enabled {
+            warn!(
+                "Standard building mode is deprecated and this flag will be removed in a future release. Running in flashblocks mode"
+            )
+        }
+
         let interval = Duration::from_millis(args.flashblocks.flashblocks_block_time);
 
         let ws_addr = SocketAddr::new(