Add inflation subcommand

cli/src/inflation.rs

@@ -0,0 +1,89 @@
+use crate::cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult};
+use clap::{App, ArgMatches, SubCommand};
+use console::style;
+use solana_clap_utils::keypair::*;
+use solana_client::rpc_client::RpcClient;
+use solana_remote_wallet::remote_wallet::RemoteWalletManager;
+use std::sync::Arc;
+
+#[derive(Debug, PartialEq)]
+pub enum InflationCliCommand {
+    Show,
+}
+
+pub trait InflationSubCommands {
+    fn inflation_subcommands(self) -> Self;
+}
+
+impl InflationSubCommands for App<'_, '_> {
+    fn inflation_subcommands(self) -> Self {
+        self.subcommand(SubCommand::with_name("inflation").about("Show inflation information"))
+    }
+}
+
+pub fn parse_inflation_subcommand(
+    _matches: &ArgMatches<'_>,
+    _default_signer: &DefaultSigner,
+    _wallet_manager: &mut Option<Arc<RemoteWalletManager>>,
+) -> Result<CliCommandInfo, CliError> {
+    Ok(CliCommandInfo {
+        command: CliCommand::Inflation(InflationCliCommand::Show),
+        signers: vec![],
+    })
+}
+
+pub fn process_inflation_subcommand(
+    rpc_client: &RpcClient,
+    _config: &CliConfig,
+    inflation_subcommand: &InflationCliCommand,
+) -> ProcessResult {
+    assert_eq!(*inflation_subcommand, InflationCliCommand::Show);
+
+    let governor = rpc_client.get_inflation_governor()?;
+    let current_inflation_rate = rpc_client.get_inflation_rate()?;
+
+    println!("{}", style("Inflation Governor:").bold());
+    if (governor.initial - governor.terminal).abs() < f64::EPSILON {
+        println!(
+            "Fixed APR:               {:>5.2}%",
+            governor.terminal * 100.
+        );
+    } else {
+        println!("Initial APR:             {:>5.2}%", governor.initial * 100.);
+        println!(
+            "Terminal APR:            {:>5.2}%",
+            governor.terminal * 100.
+        );
+        println!("Rate reduction per year: {:>5.2}%", governor.taper * 100.);
+    }
+    if governor.foundation_term > 0. {
+        println!("Foundation percentage:   {:>5.2}%", governor.foundation);
+        println!(
+            "Foundation term:         {:.1} years",
+            governor.foundation_term
+        );
+    }
+
+    println!(
+        "\n{}",
+        style(format!(
+            "Inflation for Epoch {}:",
+            current_inflation_rate.epoch
+        ))
+        .bold()
+    );
+    println!(
+        "Total APR:               {:>5.2}%",
+        current_inflation_rate.total * 100.
+    );
+    println!(
+        "Staking APR:             {:>5.2}%",
+        current_inflation_rate.validator * 100.
+    );
+    println!(
+        "Foundation APR:          {:>5.2}%",
+        current_inflation_rate.foundation * 100.
+    );
+
+    Ok("".to_string())
+}