Cli: expose last valid block height (solana-labs#18620)

* Add Fees struct to client

* Add complete RpcClient::get_fees methods

* Switch cli to last_valid_block_height

cli-output/src/cli_output.rs

@@ -1720,6 +1720,7 @@ pub struct CliFeesInner {
     pub blockhash: String,
     pub lamports_per_signature: u64,
     pub last_valid_slot: Option<Slot>,
+    pub last_valid_block_height: Option<Slot>,
 }
 
 impl QuietDisplay for CliFeesInner {}
@@ -1733,11 +1734,11 @@ impl fmt::Display for CliFeesInner {
             "Lamports per signature:",
             &self.lamports_per_signature.to_string(),
         )?;
-        let last_valid_slot = self
-            .last_valid_slot
+        let last_valid_block_height = self
+            .last_valid_block_height
             .map(|s| s.to_string())
             .unwrap_or_default();
-        writeln_name_value(f, "Last valid slot:", &last_valid_slot)
+        writeln_name_value(f, "Last valid block height:", &last_valid_block_height)
     }
 }
 
@@ -1766,13 +1767,15 @@ impl CliFees {
         blockhash: Hash,
         lamports_per_signature: u64,
         last_valid_slot: Option<Slot>,
+        last_valid_block_height: Option<Slot>,
     ) -> Self {
         Self {
             inner: Some(CliFeesInner {
                 slot,
                 blockhash: blockhash.to_string(),
                 lamports_per_signature,
                 last_valid_slot,
+                last_valid_block_height,
             }),
         }
     }

cli/src/cluster_query.rs

@@ -936,18 +936,19 @@ pub fn process_fees(
                 *recent_blockhash,
                 fee_calculator.lamports_per_signature,
                 None,
+                None,
             )
         } else {
             CliFees::none()
         }
     } else {
-        let result = rpc_client.get_recent_blockhash_with_commitment(config.commitment)?;
-        let (recent_blockhash, fee_calculator, last_valid_slot) = result.value;
+        let result = rpc_client.get_fees_with_commitment(config.commitment)?;
         CliFees::some(
             result.context.slot,
-            recent_blockhash,
-            fee_calculator.lamports_per_signature,
-            Some(last_valid_slot),
+            result.value.blockhash,
+            result.value.fee_calculator.lamports_per_signature,
+            None,
+            Some(result.value.last_valid_block_height),
         )
     };
     Ok(config.output_format.formatted_string(&fees))

client/src/fees.rs

@@ -0,0 +1,9 @@
+use crate::{fee_calculator::FeeCalculator, hash::Hash};
+
+#[derive(Serialize, Deserialize, Clone, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Fees {
+    pub blockhash: Hash,
+    pub fee_calculator: FeeCalculator,
+    pub last_valid_block_height: u64,
+}

client/src/rpc_client.rs

@@ -1247,6 +1247,34 @@ impl RpcClient {
         )
     }
 
+    pub fn get_fees(&self) -> ClientResult<Fees> {
+        Ok(self.get_fees_with_commitment(self.commitment())?.value)
+    }
+
+    pub fn get_fees_with_commitment(&self, commitment_config: CommitmentConfig) -> RpcResult<Fees> {
+        let Response {
+            context,
+            value: fees,
+        } = self.send::<Response<RpcFees>>(
+            RpcRequest::GetFees,
+            json!([self.maybe_map_commitment(commitment_config)?]),
+        )?;
+        let blockhash = fees.blockhash.parse().map_err(|_| {
+            ClientError::new_with_request(
+                RpcError::ParseError("Hash".to_string()).into(),
+                RpcRequest::GetFees,
+            )
+        })?;
+        Ok(Response {
+            context,
+            value: Fees {
+                blockhash,
+                fee_calculator: fees.fee_calculator,
+                last_valid_block_height: fees.last_valid_block_height,
+            },
+        })
+    }
+
     pub fn get_recent_blockhash(&self) -> ClientResult<(Hash, FeeCalculator)> {
         let (blockhash, fee_calculator, _last_valid_slot) = self
             .get_recent_blockhash_with_commitment(self.commitment())?

client/src/rpc_response.rs

@@ -4,6 +4,7 @@ use {
     solana_sdk::{
         clock::{Epoch, Slot, UnixTimestamp},
         fee_calculator::{FeeCalculator, FeeRateGovernor},
+        hash::Hash,
         inflation::Inflation,
         transaction::{Result, TransactionError},
     },
@@ -57,6 +58,14 @@ pub struct DeprecatedRpcFees {
     pub last_valid_slot: Slot,
 }
 
+#[derive(Serialize, Deserialize, Clone, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Fees {
+    pub blockhash: Hash,
+    pub fee_calculator: FeeCalculator,
+    pub last_valid_block_height: u64,
+}
+
 #[derive(Serialize, Deserialize, Clone, Debug)]
 #[serde(rename_all = "camelCase")]
 pub struct RpcFeeCalculator {