Implementing method get slot

lite-rpc/src/bridge.rs

@@ -36,7 +36,7 @@ use solana_rpc_client_api::{
 };
 use solana_sdk::{
     commitment_config::CommitmentConfig, hash::Hash, pubkey::Pubkey, signature::Keypair,
-    transaction::VersionedTransaction,
+    transaction::VersionedTransaction, slot_history::Slot,
 };
 use solana_transaction_status::TransactionStatus;
 use tokio::{
@@ -458,6 +458,22 @@ impl LiteRpcServer for LiteBridge {
         Ok(airdrop_sig)
     }
 
+    async fn get_slot(
+        &self,
+        config: Option<RpcContextConfig>,
+    ) -> crate::rpc::Result<Slot> {
+        let commitment_config = config
+            .map(|config| config.commitment.unwrap_or_default())
+            .unwrap_or_default();
+
+        let (_,
+            BlockInformation {
+                slot, ..
+            }
+        ) = self.block_store.get_latest_block(commitment_config).await;
+        Ok(slot)
+    }
+
     async fn signature_subscribe(
         &self,
         pending: PendingSubscriptionSink,

lite-rpc/src/rpc.rs

@@ -5,6 +5,7 @@ use solana_rpc_client_api::config::{
 };
 use solana_rpc_client_api::response::{Response as RpcResponse, RpcBlockhash, RpcVersionInfo};
 use solana_sdk::commitment_config::CommitmentConfig;
+use solana_sdk::slot_history::Slot;
 use solana_transaction_status::TransactionStatus;
 
 use crate::configs::{IsBlockHashValidConfig, SendTransactionConfig};
@@ -51,6 +52,9 @@ pub trait LiteRpc {
         config: Option<RpcRequestAirdropConfig>,
     ) -> Result<String>;
 
+    #[method(name = "getSlot")]
+    async fn get_slot(&self, config: Option<RpcContextConfig>) -> Result<Slot>;
+
     #[subscription(name = "signatureSubscribe" => "signatureNotification", unsubscribe="signatureUnsubscribe", item=RpcResponse<serde_json::Value>)]
     async fn signature_subscribe(
         &self,