From 8105b761edc96e00ea44aa8bdb30d0953ac86c1e Mon Sep 17 00:00:00 2001
From: Brooks Prumo <brooks@solana.com>
Date: Thu, 21 Jul 2022 07:23:18 -0500
Subject: [PATCH] Add CLI to get stake minimum delegation (#26645)

---
 cli/src/cli.rs     |  7 +++++++
 cli/src/stake.rs   | 36 +++++++++++++++++++++++++++++++++++-
 cli/tests/stake.rs | 15 +++++++++++++++
 3 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/cli/src/cli.rs b/cli/src/cli.rs
index 6e360dee0..d4e580d7e 100644
--- a/cli/src/cli.rs
+++ b/cli/src/cli.rs
@@ -416,6 +416,9 @@ pub enum CliCommand {
         derived_address_seed: Option<String>,
         derived_address_program_id: Option<Pubkey>,
     },
+    StakeMinimumDelegation {
+        use_lamports_unit: bool,
+    },
 }
 
 #[derive(Debug, PartialEq)]
@@ -706,6 +709,7 @@ pub fn parse_command(
         }
         ("stake-account", Some(matches)) => parse_show_stake_account(matches, wallet_manager),
         ("stake-history", Some(matches)) => parse_show_stake_history(matches),
+        ("stake-minimum-delegation", Some(matches)) => parse_stake_minimum_delegation(matches),
         // Validator Info Commands
         ("validator-info", Some(matches)) => match matches.subcommand() {
             ("publish", Some(matches)) => {
@@ -1301,6 +1305,9 @@ pub fn process_command(config: &CliConfig) -> ProcessResult {
             seed.as_ref(),
             *fee_payer,
         ),
+        CliCommand::StakeMinimumDelegation { use_lamports_unit } => {
+            process_stake_minimum_delegation(&rpc_client, config, *use_lamports_unit)
+        }
 
         // Validator Info Commands
 
diff --git a/cli/src/stake.rs b/cli/src/stake.rs
index f6a76f7e9..51686d66d 100644
--- a/cli/src/stake.rs
+++ b/cli/src/stake.rs
@@ -21,7 +21,7 @@ use {
         ArgConstant,
     },
     solana_cli_output::{
-        return_signers_with_config, CliEpochReward, CliStakeHistory, CliStakeHistoryEntry,
+        self, return_signers_with_config, CliEpochReward, CliStakeHistory, CliStakeHistoryEntry,
         CliStakeState, CliStakeType, OutputFormat, ReturnSignersConfig,
     },
     solana_client::{
@@ -656,6 +656,16 @@ impl StakeSubCommands for App<'_, '_> {
                         .help("Display NUM recent epochs worth of stake history in text mode. 0 for all")
                 )
         )
+        .subcommand(
+            SubCommand::with_name("stake-minimum-delegation")
+                .about("Get the stake minimum delegation amount")
+                .arg(
+                    Arg::with_name("lamports")
+                        .long("lamports")
+                        .takes_value(false)
+                        .help("Display minimum delegation in lamports instead of SOL")
+                )
+        )
     }
 }
 
@@ -1195,6 +1205,16 @@ pub fn parse_show_stake_history(matches: &ArgMatches<'_>) -> Result<CliCommandIn
     })
 }
 
+pub fn parse_stake_minimum_delegation(
+    matches: &ArgMatches<'_>,
+) -> Result<CliCommandInfo, CliError> {
+    let use_lamports_unit = matches.is_present("lamports");
+    Ok(CliCommandInfo {
+        command: CliCommand::StakeMinimumDelegation { use_lamports_unit },
+        signers: vec![],
+    })
+}
+
 #[allow(clippy::too_many_arguments)]
 pub fn process_create_stake_account(
     rpc_client: &RpcClient,
@@ -2501,6 +2521,20 @@ pub fn process_delegate_stake(
     }
 }
 
+pub fn process_stake_minimum_delegation(
+    rpc_client: &RpcClient,
+    config: &CliConfig,
+    use_lamports_unit: bool,
+) -> ProcessResult {
+    let stake_minimum_delegation =
+        rpc_client.get_stake_minimum_delegation_with_commitment(config.commitment)?;
+    Ok(solana_cli_output::display::build_balance_message(
+        stake_minimum_delegation,
+        use_lamports_unit,
+        true,
+    ))
+}
+
 #[cfg(test)]
 mod tests {
     use {
diff --git a/cli/tests/stake.rs b/cli/tests/stake.rs
index edcebd317..2fda3af9b 100644
--- a/cli/tests/stake.rs
+++ b/cli/tests/stake.rs
@@ -1982,3 +1982,18 @@ fn test_stake_checked_instructions() {
     assert_eq!(current_lockup.epoch, lockup.epoch.unwrap());
     assert_eq!(current_lockup.custodian, custodian_pubkey);
 }
+
+#[test]
+fn test_stake_minimum_delegation() {
+    let test_validator =
+        TestValidator::with_no_fees(Pubkey::new_unique(), None, SocketAddrSpace::Unspecified);
+    let mut config = CliConfig::recent_for_tests();
+    config.json_rpc_url = test_validator.rpc_url();
+
+    config.command = CliCommand::StakeMinimumDelegation {
+        use_lamports_unit: true,
+    };
+
+    let result = process_command(&config);
+    assert!(matches!(result, Ok(..)));
+}