Detect and notify when deserializable shreds are available (#11816)

* Add logic to check for complete data ranges

* Add RPC signature notification

Co-authored-by: Carl <carl@solana.com>

client/src/rpc_config.rs

@@ -69,6 +69,14 @@ pub enum RpcTokenAccountsFilter {
     ProgramId(String),
 }
 
+#[derive(Debug, Clone, Default, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RpcSignatureSubscribeConfig {
+    #[serde(flatten)]
+    pub commitment: Option<CommitmentConfig>,
+    pub enable_received_notification: Option<bool>,
+}
+
 #[derive(Debug, Clone, Default, PartialEq, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct RpcGetConfirmedSignaturesForAddress2Config {