cli: add block and first-available-block commands (bp #12083) (#12084)

* Add first-available-block command

(cherry picked from commit 6677996369)

* Add block command

(cherry picked from commit 27752c4e4d)

Co-authored-by: Michael Vines <mvines@gmail.com>

cli/src/cluster_query.rs

@@ -57,6 +57,19 @@ pub trait ClusterQuerySubCommands {
 impl ClusterQuerySubCommands for App<'_, '_> {
     fn cluster_query_subcommands(self) -> Self {
         self.subcommand(
+            SubCommand::with_name("block")
+                .about("Get a confirmed block")
+                .arg(
+                    Arg::with_name("slot")
+                        .long("slot")
+                        .validator(is_slot)
+                        .value_name("SLOT")
+                        .takes_value(true)
+                        .index(1)
+                        .required(true),
+                ),
+        )
+        .subcommand(
             SubCommand::with_name("catchup")
                 .about("Wait for a validator to catch up to the cluster")
                 .arg(
@@ -91,6 +104,10 @@ impl ClusterQuerySubCommands for App<'_, '_> {
                 .about("Get the version of the cluster entrypoint"),
         )
         .subcommand(SubCommand::with_name("fees").about("Display current cluster fees"))
+        .subcommand(
+            SubCommand::with_name("first-available-block")
+                .about("Get the first available block in the storage"),
+        )
         .subcommand(SubCommand::with_name("block-time")
             .about("Get estimated production time of a block")
             .alias("get-block-time")
@@ -342,6 +359,14 @@ pub fn parse_cluster_ping(
     })
 }
 
+pub fn parse_get_block(matches: &ArgMatches<'_>) -> Result<CliCommandInfo, CliError> {
+    let slot = value_t_or_exit!(matches, "slot", Slot);
+    Ok(CliCommandInfo {
+        command: CliCommand::GetBlock { slot },
+        signers: vec![],
+    })
+}
+
 pub fn parse_get_block_time(matches: &ArgMatches<'_>) -> Result<CliCommandInfo, CliError> {
     let slot = value_of(matches, "slot");
     Ok(CliCommandInfo {
@@ -614,6 +639,11 @@ pub fn process_fees(rpc_client: &RpcClient, config: &CliConfig) -> ProcessResult
     Ok(config.output_format.formatted_string(&fees))
 }
 
+pub fn process_first_available_block(rpc_client: &RpcClient) -> ProcessResult {
+    let first_available_block = rpc_client.get_first_available_block()?;
+    Ok(format!("{}", first_available_block))
+}
+
 pub fn process_leader_schedule(rpc_client: &RpcClient) -> ProcessResult {
     let epoch_info = rpc_client.get_epoch_info()?;
     let first_slot_in_epoch = epoch_info.absolute_slot - epoch_info.slot_index;
@@ -649,6 +679,42 @@ pub fn process_leader_schedule(rpc_client: &RpcClient) -> ProcessResult {
     Ok("".to_string())
 }
 
+pub fn process_get_block(rpc_client: &RpcClient, _config: &CliConfig, slot: Slot) -> ProcessResult {
+    let block =
+        rpc_client.get_confirmed_block_with_encoding(slot, UiTransactionEncoding::Base64)?;
+
+    println!("Slot: {}", slot);
+    println!("Parent Slot: {}", block.parent_slot);
+    println!("Blockhash: {}", block.blockhash);
+    println!("Previous Blockhash: {}", block.previous_blockhash);
+    if block.block_time.is_some() {
+        println!("Block Time: {:?}", block.block_time);
+    }
+    if !block.rewards.is_empty() {
+        println!("Rewards:",);
+        for reward in block.rewards {
+            println!(
+                "  {:<44}: {}",
+                reward.pubkey,
+                if reward.lamports > 0 {
+                    format!("◎{}", lamports_to_sol(reward.lamports as u64))
+                } else {
+                    format!("◎-{}", lamports_to_sol(reward.lamports.abs() as u64))
+                }
+            );
+        }
+    }
+    for (index, transaction_with_meta) in block.transactions.iter().enumerate() {
+        println!("Transaction {}:", index);
+        println_transaction(
+            &transaction_with_meta.transaction.decode().unwrap(),
+            &transaction_with_meta.meta,
+            "  ",
+        );
+    }
+    Ok("".to_string())
+}
+
 pub fn process_get_block_time(
     rpc_client: &RpcClient,
     config: &CliConfig,