use noop instead of memo

src/crank.rs

@@ -2,6 +2,7 @@ use crate::{
     helpers::to_sp_pk,
     mango::GroupConfig,
     mango_v3_perp_crank_sink::MangoV3PerpCrankSink,
+    noop,
     states::{KeeperInstruction, TransactionSendRecord},
     tpu_manager::TpuManager,
 };
@@ -18,7 +19,6 @@ use solana_sdk::{
     hash::Hash, instruction::Instruction, pubkey::Pubkey, signature::Keypair, signer::Signer,
     transaction::Transaction,
 };
-use solana_transaction_status::extract_memos::{ExtractMemos, spl_memo_id_v3};
 use std::{
     str::FromStr,
     sync::{
@@ -81,9 +81,16 @@ pub fn start(
             }
 
             if let Ok((market, mut ixs)) = instruction_receiver.recv().await {
-                // TODO add priority fee
-
-                ixs.push(Instruction { program_id: spl_memo_id_v3(), accounts: vec![], data: Utc::now().timestamp_micros().to_le_bytes().into() });
+                // add priority fees
+                ixs.push(
+                    solana_sdk::compute_budget::ComputeBudgetInstruction::set_compute_unit_price(
+                        prioritization_fee,
+                    ),
+                );
+                // add timestamp to guarantee unique transactions
+                ixs.push(noop::instruction(
+                    Utc::now().timestamp_micros().to_le_bytes().into(),
+                ));
 
                 let tx = Transaction::new_signed_with_payer(
                     &ixs,

src/keeper.rs

@@ -1,8 +1,7 @@
-use solana_transaction_status::extract_memos::spl_memo_id_v3;
-
 use {
     crate::{
         helpers::to_sdk_instruction,
+        noop,
         states::{KeeperInstruction, PerpMarketCache, TransactionSendRecord},
         tpu_manager::TpuManager,
     },
@@ -111,12 +110,8 @@ pub async fn send_transaction(
     prioritization_fee: u64,
     keeper_instruction: KeeperInstruction,
 ) {
-    // add a memo with a current timestamp to ensure unique txs
-    ixs.push(Instruction {
-        program_id: spl_memo_id_v3(),
-        accounts: vec![],
-        data: Utc::now().timestamp_micros().to_le_bytes().into(),
-    });
+    // add a noop with a current timestamp to ensure unique txs
+    ixs.push(noop::instruction(Utc::now().timestamp_micros().to_le_bytes().into()));
     // add priority fees
     ixs.push(
         solana_sdk::compute_budget::ComputeBudgetInstruction::set_compute_unit_price(

src/lib.rs

@@ -6,6 +6,7 @@ pub mod keeper;
 pub mod mango;
 pub mod mango_v3_perp_crank_sink;
 pub mod market_markers;
+pub mod noop;
 pub mod result_writer;
 pub mod rotating_queue;
 pub mod states;

src/mango_v3_perp_crank_sink.rs

@@ -1,4 +1,4 @@
-use std::{cell::RefCell, collections::{BTreeMap, HashSet}, convert::TryFrom, mem::size_of, sync::Arc};
+use std::{cell::RefCell, collections::{BTreeMap, HashSet}, convert::TryFrom, mem::size_of};
 
 use arrayref::array_ref;
 use async_channel::Sender;

src/noop.rs

@@ -0,0 +1,11 @@
+use std::str::FromStr;
+
+use solana_sdk::{pubkey::Pubkey, instruction::Instruction};
+
+pub fn instruction(data: Vec<u8>) -> Instruction {
+  Instruction {
+      program_id: Pubkey::from_str("noopb9bkMVfRPU8AsbpTUg8AQkHtKwMYZiFUjNRtMmV").unwrap(),
+      accounts: vec![],
+      data,
+  }
+}