feat: add --dev-tx-interval-ms CLI option

cli/src/commands/start.rs

@@ -37,7 +37,7 @@ use colored::Colorize;
 use core::str::FromStr;
 use rand::SeedableRng;
 use rand_chacha::ChaChaRng;
-use std::{net::SocketAddr, path::PathBuf};
+use std::{net::SocketAddr, path::PathBuf, time::Duration};
 use tokio::runtime::{self, Runtime};
 
 /// The recommended minimum number of 'open files' limit for a validator.
@@ -117,6 +117,9 @@ pub struct Start {
     /// If development mode is enabled, specify the number of genesis validators (default: 4)
     #[clap(long)]
     pub dev_num_validators: Option<u16>,
+    /// If development mode is enabled, specify the interval of mock transaction generation in milliseconds (default: 500ms if dev=0, None otherwise)
+    #[clap(long)]
+    pub dev_tx_interval_ms: Option<u16>,
 }
 
 impl Start {
@@ -430,8 +433,10 @@ impl Start {
 
         // Initialize the node.
         let bft_ip = if self.dev.is_some() { self.bft } else { None };
+        // Treat dev_tx_interval_ms=0 as Option<Duration>::None
+        let dev_tx_interval = self.dev_tx_interval_ms.filter(|msec| *msec > 0).map(|msec| Duration::from_millis(msec as u64));
         match node_type {
-            NodeType::Validator => Node::new_validator(self.node, rest_ip, bft_ip, account, &trusted_peers, &trusted_validators, genesis, cdn, self.dev).await,
+            NodeType::Validator => Node::new_validator(self.node, rest_ip, bft_ip, account, &trusted_peers, &trusted_validators, genesis, cdn, self.dev, dev_tx_interval).await,
             NodeType::Prover => Node::new_prover(self.node, account, &trusted_peers, genesis, self.dev).await,
             NodeType::Client => Node::new_client(self.node, rest_ip, account, &trusted_peers, genesis, cdn, self.dev).await,
         }

node/src/node.rs

@@ -25,7 +25,7 @@ use snarkvm::prelude::{
 };
 
 use anyhow::Result;
-use std::{net::SocketAddr, sync::Arc};
+use std::{net::SocketAddr, sync::Arc, time::Duration};
 
 pub enum Node<N: Network> {
     /// A validator is a full node, capable of validating blocks.
@@ -48,10 +48,22 @@ impl<N: Network> Node<N> {
         genesis: Block<N>,
         cdn: Option<String>,
         dev: Option<u16>,
+        dev_tx_interval: Option<Duration>,
     ) -> Result<Self> {
         Ok(Self::Validator(Arc::new(
-            Validator::new(node_ip, rest_ip, bft_ip, account, trusted_peers, trusted_validators, genesis, cdn, dev)
-                .await?,
+            Validator::new(
+                node_ip,
+                rest_ip,
+                bft_ip,
+                account,
+                trusted_peers,
+                trusted_validators,
+                genesis,
+                cdn,
+                dev,
+                dev_tx_interval,
+            )
+            .await?,
         )))
     }
 

node/src/validator/mod.rs

@@ -81,6 +81,7 @@ impl<N: Network, C: ConsensusStorage<N>> Validator<N, C> {
         genesis: Block<N>,
         cdn: Option<String>,
         dev: Option<u16>,
+        dev_tx_interval: Option<Duration>,
     ) -> Result<Self> {
         // Initialize the signal handler.
         let signal_node = Self::handle_signals();
@@ -132,7 +133,7 @@ impl<N: Network, C: ConsensusStorage<N>> Validator<N, C> {
             shutdown: Default::default(),
         };
         // Initialize the transaction pool.
-        node.initialize_transaction_pool(dev)?;
+        node.initialize_transaction_pool(dev, dev_tx_interval)?;
 
         // Initialize the REST server.
         if let Some(rest_ip) = rest_ip {
@@ -331,24 +332,29 @@ impl<N: Network, C: ConsensusStorage<N>> Validator<N, C> {
     // }
 
     /// Initialize the transaction pool.
-    fn initialize_transaction_pool(&self, dev: Option<u16>) -> Result<()> {
+    fn initialize_transaction_pool(&self, dev: Option<u16>, dev_tx_interval: Option<Duration>) -> Result<()> {
         use snarkvm::console::{
             program::{Identifier, Literal, ProgramID, Value},
             types::U64,
         };
         use std::str::FromStr;
 
+        // The default transaction generation interval (overrideable with --dev-tx-interval-ms)
+        const DEFAULT_INTERVAL: Duration = Duration::from_millis(500);
+
         // Initialize the locator.
         let locator = (ProgramID::from_str("credits.aleo")?, Identifier::from_str("transfer_public")?);
 
-        // Determine whether to start the loop.
-        match dev {
+        // Determine whether to start the loop and resolve generation interval.
+        let interval = match dev {
             // If the node is running in development mode, only generate if you are allowed.
             Some(dev) => {
-                // If the node is not the first node, do not start the loop.
-                if dev != 0 {
+                // If the node is not the first node and tx interval is not explicitly set, do not start the loop.
+                if dev != 0 && dev_tx_interval.is_none() {
                     return Ok(());
                 }
+
+                dev_tx_interval.unwrap_or(DEFAULT_INTERVAL)
             }
             None => {
                 // Retrieve the genesis committee.
@@ -362,9 +368,10 @@ impl<N: Network, C: ConsensusStorage<N>> Validator<N, C> {
                 // If the node is not the first member, do not start the loop.
                 if self.address() != *first_member {
                     return Ok(());
-                }
+                };
+                DEFAULT_INTERVAL
             }
-        }
+        };
 
         let self_ = self.clone();
         self.spawn(async move {
@@ -373,7 +380,7 @@ impl<N: Network, C: ConsensusStorage<N>> Validator<N, C> {
 
             // Start the transaction loop.
             loop {
-                tokio::time::sleep(Duration::from_millis(500)).await;
+                tokio::time::sleep(interval).await;
 
                 // Prepare the inputs.
                 let inputs = [Value::from(Literal::Address(self_.address())), Value::from(Literal::U64(U64::new(1)))];
@@ -486,6 +493,7 @@ mod tests {
             genesis,
             None,
             dev,
+            None,
         )
         .await
         .unwrap();