add memo

src/experimental-bots/filler/fillerMultithreaded.ts

@@ -61,6 +61,7 @@ import {
 	// getStaleOracleMarketIndexes,
 	handleSimResultError,
 	logMessageForNodeToFill,
+	MEMO_PROGRAM_ID,
 	removePythIxs,
 	simulateAndGetTxWithCUs,
 	SimulateAndGetTxWithCUsResponse,
@@ -1680,6 +1681,13 @@ export class FillerMultithreaded {
 					ixs = removePythIxs(ixs);
 				}
 
+				ixs.push(
+					new TransactionInstruction({
+						programId: MEMO_PROGRAM_ID,
+						keys: [],
+						data: Buffer.from(`mm-perp ${fillTxId} ${makers.length}`, 'utf-8'),
+					})
+				);
 				const simResult = await simulateAndGetTxWithCUs({
 					ixs,
 					connection: this.driftClient.connection,
@@ -1893,6 +1901,14 @@ export class FillerMultithreaded {
 			ixs = removePythIxs(ixs);
 		}
 
+		ixs.push(
+			new TransactionInstruction({
+				programId: MEMO_PROGRAM_ID,
+				keys: [],
+				data: Buffer.from(`ff-perp ${fillTxId}`, 'utf-8'),
+			})
+		);
+
 		const simResult = await simulateAndGetTxWithCUs({
 			ixs,
 			connection: this.driftClient.connection,

src/experimental-bots/spotFiller/spotFillerMultithreaded.ts

@@ -48,6 +48,7 @@ import {
 	RuntimeSpec,
 } from '../../metrics';
 import {
+	MEMO_PROGRAM_ID,
 	SimulateAndGetTxWithCUsResponse,
 	getAllPythOracleUpdateIxs,
 	getFillSignatureFromUserAccountAndOrderId,
@@ -1023,6 +1024,15 @@ export class SpotFillerMultithreaded {
 						await this.driftClient.getRevertFillIx(user.userAccountPublicKey)
 					);
 				}
+
+				ixs.push(
+					new TransactionInstruction({
+						programId: MEMO_PROGRAM_ID,
+						keys: [],
+						data: Buffer.from(`mm-spot ${fillTxId} ${makers.length}`, 'utf-8'),
+					})
+				);
+
 				const simResult = await simulateAndGetTxWithCUs({
 					ixs,
 					connection: this.driftClient.connection,
@@ -1254,6 +1264,15 @@ export class SpotFillerMultithreaded {
 				await this.driftClient.getRevertFillIx(user.userAccountPublicKey)
 			);
 		}
+
+		ixs.push(
+			new TransactionInstruction({
+				programId: MEMO_PROGRAM_ID,
+				keys: [],
+				data: Buffer.from(`ff-spot ${fillTxId}`, 'utf-8'),
+			})
+		);
+
 		const simResult = await simulateAndGetTxWithCUs({
 			ixs,
 			connection: this.driftClient.connection,

src/utils.ts

@@ -70,6 +70,10 @@ export const TOKEN_FAUCET_PROGRAM_ID = new PublicKey(
 	'V4v1mQiAdLz4qwckEb45WqHYceYizoib39cDBHSWfaB'
 );
 
+export const MEMO_PROGRAM_ID = new PublicKey(
+	'MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr'
+);
+
 const JUPITER_SLIPPAGE_BPS = 100;
 export const PRIORITY_FEE_SERVER_RATE_LIMIT_PER_MIN = 300;