Add wait for max stake command (#13532)

cli/src/cli.rs

@@ -149,6 +149,9 @@ pub enum CliCommand {
         limit: usize,
         show_transactions: bool,
     },
+    WaitForMaxStake {
+        max_stake_percent: f32,
+    },
     // Nonce commands
     AuthorizeNonceAccount {
         nonce_account: Pubkey,
@@ -624,6 +627,13 @@ pub fn parse_command(
                 signers,
             })
         }
+        ("wait-for-max-stake", Some(matches)) => {
+            let max_stake_percent = value_t_or_exit!(matches, "max_percent", f32);
+            Ok(CliCommandInfo {
+                command: CliCommand::WaitForMaxStake { max_stake_percent },
+                signers: vec![],
+            })
+        }
         // Stake Commands
         ("create-stake-account", Some(matches)) => {
             parse_stake_create_account(matches, default_signer, wallet_manager)
@@ -1565,6 +1575,9 @@ pub fn process_command(config: &CliConfig) -> ProcessResult {
             *use_lamports_unit,
             vote_account_pubkeys.as_deref(),
         ),
+        CliCommand::WaitForMaxStake { max_stake_percent } => {
+            process_wait_for_max_stake(&rpc_client, config, *max_stake_percent)
+        }
         CliCommand::ShowValidators { use_lamports_unit } => {
             process_show_validators(&rpc_client, config, *use_lamports_unit)
         }

cli/src/cluster_query.rs

@@ -318,6 +318,17 @@ impl ClusterQuerySubCommands for App<'_, '_> {
                         .help("Display the full transactions"),
                 )
         )
+        .subcommand(
+            SubCommand::with_name("wait-for-max-stake")
+                .about("Wait for the max stake of any one node to drop below a percentage of total.")
+                .arg(
+                    Arg::with_name("max_percent")
+                        .long("max-percent")
+                        .value_name("PERCENT")
+                        .takes_value(true)
+                        .index(1),
+                ),
+        )
     }
 }
 
@@ -1400,6 +1411,16 @@ pub fn process_show_stakes(
         .formatted_string(&CliStakeVec::new(stake_accounts)))
 }
 
+pub fn process_wait_for_max_stake(
+    rpc_client: &RpcClient,
+    config: &CliConfig,
+    max_stake_percent: f32,
+) -> ProcessResult {
+    let now = std::time::Instant::now();
+    rpc_client.wait_for_max_stake(config.commitment, max_stake_percent)?;
+    Ok(format!("Done waiting, took: {}s", now.elapsed().as_secs()))
+}
+
 pub fn process_show_validators(
     rpc_client: &RpcClient,
     config: &CliConfig,