diff --git a/script/src/verify.rs b/script/src/verify.rs
index 3f4ebc81a8..0ff5aca316 100644
--- a/script/src/verify.rs
+++ b/script/src/verify.rs
@@ -336,8 +336,6 @@ impl<DL: CellDataProvider + HeaderProvider + ExtensionProvider + Send + Sync + C
 pub struct TransactionScriptsVerifier<DL> {
     data_loader: DL,
 
-    debug_printer: DebugPrinter,
-
     rtx: Arc<ResolvedTransaction>,
 
     binaries_by_data_hash: HashMap<Byte32, LazyData>,
@@ -464,7 +462,6 @@ impl<DL: CellDataProvider + HeaderProvider + ExtensionProvider + Send + Sync + C
             rtx,
             lock_groups,
             type_groups,
-            debug_printer,
             #[cfg(test)]
             skip_pause,
             consensus,
@@ -483,7 +480,7 @@ impl<DL: CellDataProvider + HeaderProvider + ExtensionProvider + Send + Sync + C
     /// * `hash: &Byte32`: this is the script hash of currently running script group.
     /// * `message: &str`: message passed to the debug syscall.
     pub fn set_debug_printer<F: Fn(&Byte32, &str) + Sync + Send + 'static>(&mut self, func: F) {
-        self.debug_printer = Arc::new(func);
+        self.generator.debug_printer = Arc::new(func);
     }
 
     #[cfg(test)]
diff --git a/spec/src/consensus.rs b/spec/src/consensus.rs
index a7d053610c..800225209c 100644
--- a/spec/src/consensus.rs
+++ b/spec/src/consensus.rs
@@ -797,9 +797,18 @@ impl Consensus {
                     epoch_duration_in_milliseconds,
                 } => {
                     if self.permanent_difficulty() {
+                        let primary_epoch_reward =
+                            self.primary_epoch_reward_of_next_epoch(&epoch).as_u64();
+                        let block_reward =
+                            Capacity::shannons(primary_epoch_reward / epoch.length());
+                        let remainder_reward =
+                            Capacity::shannons(primary_epoch_reward % epoch.length());
+
                         let dummy_epoch_ext = epoch
                             .clone()
                             .into_builder()
+                            .base_block_reward(block_reward)
+                            .remainder_reward(remainder_reward)
                             .number(epoch.number() + 1)
                             .last_block_hash_in_previous_epoch(header.hash())
                             .start_number(header.number() + 1)
diff --git a/util/app-config/src/cli.rs b/util/app-config/src/cli.rs
index a63a974b86..522d3faee8 100644
--- a/util/app-config/src/cli.rs
+++ b/util/app-config/src/cli.rs
@@ -1,6 +1,6 @@
 //! CKB command line arguments parser.
 use ckb_build_info::Version;
-use ckb_resource::{DEFAULT_P2P_PORT, DEFAULT_RPC_PORT, DEFAULT_SPEC};
+use ckb_resource::{AVAILABLE_SPECS, DEFAULT_P2P_PORT, DEFAULT_RPC_PORT, DEFAULT_SPEC};
 use clap::{Arg, ArgGroup, ArgMatches, Command};
 
 /// binary file name(ckb)
@@ -414,6 +414,12 @@ fn init() -> Command {
             Arg::new(ARG_CHAIN)
                 .short('c')
                 .long(ARG_CHAIN)
+                .value_parser(
+                    AVAILABLE_SPECS
+                        .iter()
+                        .map(|v| v.to_string())
+                        .collect::<Vec<_>>(),
+                )
                 .default_value(DEFAULT_SPEC)
                 .help("Initializes CKB directory for <chain>"),
         )