lukas/fix grpc multi user smol bugs (#1995)

* fix: add missing slot check on multi user update slot

* feat: min i64

* feat: only flush grpc multi user subscriber if is multi subscribed

* fix: prettier and lint

Author: LukasDeco

sdk/src/accounts/grpcMultiUserAccountSubscriber.ts

@@ -119,7 +119,10 @@ export class grpcMultiUserAccountSubscriber {
 				this.listeners.set(key, new Set());
 				this.keyToPk.set(key, userAccountPublicKey);
 				this.pendingAddKeys.add(key);
-				this.scheduleFlush();
+				if (this.isMultiSubscribed) {
+					// only schedule flush if already subscribed to the multi-subscriber
+					this.scheduleFlush();
+				}
 			}
 		};
 
@@ -161,6 +164,10 @@ export class grpcMultiUserAccountSubscriber {
 			},
 
 			updateData(userAccount: UserAccount, slot: number): void {
+				const existingData = parent.userData.get(key);
+				if (existingData && existingData.slot > slot) {
+					return;
+				}
 				parent.userData.set(key, { data: userAccount, slot });
 				perUserEmitter.emit('userAccountUpdate', userAccount);
 				perUserEmitter.emit('update');

sdk/src/constants/numericConstants.ts

@@ -1,5 +1,6 @@
 import { LAMPORTS_PER_SOL } from '@solana/web3.js';
 import { BN } from '@coral-xyz/anchor';
+import { BigNum } from '../factory/bigNum';
 
 export const ZERO = new BN(0);
 export const ONE = new BN(1);
@@ -116,3 +117,7 @@ export const FUEL_START_TS = new BN(1723147200); // unix timestamp
 export const MAX_PREDICTION_PRICE = PRICE_PRECISION;
 
 export const GET_MULTIPLE_ACCOUNTS_CHUNK_SIZE = 99;
+
+// integer constants
+export const MAX_I64 = BigNum.fromPrint('9223372036854775807').val;
+export const MIN_I64 = BigNum.fromPrint('-9223372036854775808').val;