chore: use block_selector in neptune-cli header

THis updates `neptune-cli header` to accept a block_selector instead
of a hash, just like the `block-info` command.

Also:
 * BlockHeader Display prints timestamp with standard_format()
 * BlockHeader Display prints prev_block_digest as hex
 * Adds fields to BlockInfo:
   * prev_block_digest
   * proof_of_work_line
   * proof_of_work_family

src/bin/neptune-cli.rs

@@ -1,6 +1,5 @@
 use neptune_core::models::blockchain::type_scripts::neptune_coins::NeptuneCoins;
 use neptune_core::models::state::wallet::coin_with_possible_timelock::CoinWithPossibleTimeLock;
-use neptune_core::prelude::twenty_first;
 
 use anyhow::{bail, Result};
 use clap::{CommandFactory, Parser};
@@ -20,7 +19,6 @@ use neptune_core::models::blockchain::block::block_selector::BlockSelector;
 use neptune_core::models::state::wallet::wallet_status::WalletStatus;
 use neptune_core::rpc_server::RPCClient;
 use std::io::stdout;
-use twenty_first::math::digest::Digest;
 
 #[derive(Debug, Parser)]
 enum Command {
@@ -33,7 +31,7 @@ enum Command {
     OwnInstanceId,
     BlockHeight,
     BlockInfo {
-        /// one of: genesis, tip, height/N, digest/hex
+        /// one of: genesis, tip, height/<n>, digest/<hex>
         block_selector: BlockSelector,
     },
     Confirmations,
@@ -45,7 +43,8 @@ enum Command {
     },
     TipHeader,
     Header {
-        hash: Digest,
+        /// one of: genesis, tip, height/<n>, digest/<hex>
+        block_selector: BlockSelector,
     },
     SyncedBalance,
     WalletStatus,
@@ -345,8 +344,8 @@ async fn main() -> Result<()> {
                 .expect("Tip header should be found");
             println!("{val}")
         }
-        Command::Header { hash } => {
-            let res = client.header(ctx, BlockSelector::Digest(hash)).await?;
+        Command::Header { block_selector } => {
+            let res = client.header(ctx, block_selector).await?;
             if res.is_none() {
                 println!("Block did not exist in database.");
             } else {

src/models/blockchain/block/block_header.rs

@@ -52,8 +52,8 @@ impl Display for BlockHeader {
             Proof-of-work-line: {}\n\
             Proof-of-work-family: {}",
             self.height,
-            self.timestamp,
-            self.prev_block_digest,
+            self.timestamp.standard_format(),
+            self.prev_block_digest.to_hex(),
             self.proof_of_work_line,
             self.proof_of_work_family
         );

src/models/blockchain/block/block_info.rs

@@ -1,6 +1,7 @@
 //! BlockInfo is a concise summary of a block intended for human
 //! consumption/reporting in block explorers, cli, dashboard, etc.
 
+use super::block_header::PROOF_OF_WORK_COUNT_U32_SIZE;
 use super::block_header::TARGET_DIFFICULTY_U32_SIZE;
 use crate::models::blockchain::block::block_height::BlockHeight;
 use crate::models::blockchain::block::Block;
@@ -16,7 +17,10 @@ use twenty_first::prelude::U32s;
 pub struct BlockInfo {
     pub height: BlockHeight,
     pub digest: Digest,
+    pub prev_block_digest: Digest,
     pub timestamp: Timestamp,
+    pub proof_of_work_line: U32s<PROOF_OF_WORK_COUNT_U32_SIZE>,
+    pub proof_of_work_family: U32s<PROOF_OF_WORK_COUNT_U32_SIZE>,
     pub difficulty: U32s<TARGET_DIFFICULTY_U32_SIZE>,
     pub num_inputs: usize,
     pub num_outputs: usize,
@@ -33,7 +37,10 @@ impl std::fmt::Display for BlockInfo {
         let buf = String::new()
             + &format!("height: {}\n", self.height)
             + &format!("digest: {}\n", self.digest.to_hex())
+            + &format!("prev_block_digest: {}\n", self.prev_block_digest.to_hex())
             + &format!("timestamp: {}\n", self.timestamp.standard_format())
+            + &format!("proof_of_work_line: {}\n", self.proof_of_work_line)
+            + &format!("proof_of_work_family: {}\n", self.proof_of_work_family)
             + &format!("difficulty: {}\n", self.difficulty)
             + &format!("num_inputs: {}\n", self.num_inputs)
             + &format!("num_outputs: {}\n", self.num_outputs)
@@ -58,9 +65,12 @@ impl BlockInfo {
         let digest = block.hash();
         Self {
             digest,
+            prev_block_digest: header.prev_block_digest,
             height: header.height,
             timestamp: header.timestamp,
             difficulty: header.difficulty,
+            proof_of_work_line: header.proof_of_work_line,
+            proof_of_work_family: header.proof_of_work_family,
             num_inputs: body.transaction.kernel.inputs.len(),
             num_outputs: body.transaction.kernel.outputs.len(),
             num_uncle_blocks: body.uncle_blocks.len(),