Add option to wait for a specific epoch length to bench-tps (#10083)

sdk/src/client.rs

@@ -11,6 +11,7 @@ use crate::{
     account::Account,
     clock::Slot,
     commitment_config::CommitmentConfig,
+    epoch_info::EpochInfo,
     fee_calculator::{FeeCalculator, FeeRateGovernor},
     hash::Hash,
     instruction::Instruction,
@@ -106,6 +107,8 @@ pub trait SyncClient {
         commitment_config: CommitmentConfig,
     ) -> Result<u64>;
 
+    fn get_epoch_info(&self) -> Result<EpochInfo>;
+
     /// Poll until the signature has been confirmed by at least `min_confirmed_blocks`
     fn poll_for_signature_confirmation(
         &self,