fix: #605

src/core/packet/transformer/proto/message/message.ts

@@ -54,12 +54,20 @@ export const PushMsg = {
     generalFlag: ProtoField(9, ScalarType.INT32, true),
 };
 
+export const GroupChangeInfo = {
+    operator: ProtoField(1, () => GroupChangeOperator, true),
+};
+
+export const GroupChangeOperator = {
+    operatorUid: ProtoField(1, ScalarType.STRING, true),
+};
+
 export const GroupChange = {
     groupUin: ProtoField(1, ScalarType.UINT32),
     flag: ProtoField(2, ScalarType.UINT32),
     memberUid: ProtoField(3, ScalarType.STRING, true),
     decreaseType: ProtoField(4, ScalarType.UINT32),
-    operatorUid: ProtoField(5, ScalarType.STRING, true),
+    operatorInfo: ProtoField(5, ScalarType.BYTES, true),
     increaseType: ProtoField(6, ScalarType.UINT32),
     field7: ProtoField(7, ScalarType.BYTES, true),
 };

src/onebot/api/msg.ts

@@ -28,12 +28,12 @@ import { RequestUtil } from '@/common/request';
 import fsPromise, { constants } from 'node:fs/promises';
 import { OB11FriendAddNoticeEvent } from '@/onebot/event/notice/OB11FriendAddNoticeEvent';
 import { ForwardMsgBuilder } from "@/common/forward-msg-builder";
-import { GroupChange, PushMsgBody } from "@/core/packet/transformer/proto";
 import { NapProtoMsg } from '@napneko/nap-proto-core';
 import { OB11GroupIncreaseEvent } from '../event/notice/OB11GroupIncreaseEvent';
 import { OB11GroupDecreaseEvent, GroupDecreaseSubType } from '../event/notice/OB11GroupDecreaseEvent';
 import { GroupAdmin } from '@/core/packet/transformer/proto/message/groupAdmin';
 import { OB11GroupAdminNoticeEvent } from '../event/notice/OB11GroupAdminNoticeEvent';
+import { GroupChange, GroupChangeInfo, PushMsgBody } from '@/core/packet/transformer/proto';
 
 type RawToOb11Converters = {
     [Key in keyof MessageElement as Key extends `${string}Element` ? Key : never]: (
@@ -986,15 +986,20 @@ export class OneBotMsgApi {
         if (SysMessage.contentHead.type == 33 && SysMessage.body?.msgContent) {
             const groupChange = new NapProtoMsg(GroupChange).decode(SysMessage.body.msgContent);
             this.core.apis.GroupApi.refreshGroupMemberCache(groupChange.groupUin.toString()).then().catch();
+            const operatorUid = groupChange.operatorInfo?.toString();
             return new OB11GroupIncreaseEvent(
                 this.core,
                 groupChange.groupUin,
                 groupChange.memberUid ? +await this.core.apis.UserApi.getUinByUidV2(groupChange.memberUid) : 0,
-                groupChange.operatorUid ? +await this.core.apis.UserApi.getUinByUidV2(groupChange.operatorUid) : 0,
+                operatorUid ? +await this.core.apis.UserApi.getUinByUidV2(operatorUid) : 0,
                 groupChange.decreaseType == 131 ? 'invite' : 'approve',
             );
         } else if (SysMessage.contentHead.type == 34 && SysMessage.body?.msgContent) {
             const groupChange = new NapProtoMsg(GroupChange).decode(SysMessage.body.msgContent);
+            // 自身被踢出时operatorInfo会是一个protobuf 否则大多数情况为一个string
+            const operatorUid = groupChange.decreaseType === 3 && groupChange.operatorInfo ?
+                new NapProtoMsg(GroupChangeInfo).decode(groupChange.operatorInfo).operator?.operatorUid :
+                groupChange.operatorInfo?.toString();
             if (groupChange.memberUid === this.core.selfInfo.uid) {
                 setTimeout(() => {
                     this.core.apis.GroupApi.groupMemberCache.delete(groupChange.groupUin.toString());
@@ -1007,7 +1012,7 @@ export class OneBotMsgApi {
                 this.core,
                 groupChange.groupUin,
                 groupChange.memberUid ? +await this.core.apis.UserApi.getUinByUidV2(groupChange.memberUid) : 0,
-                groupChange.operatorUid ? +await this.core.apis.UserApi.getUinByUidV2(groupChange.operatorUid) : 0,
+                operatorUid ? +await this.core.apis.UserApi.getUinByUidV2(operatorUid) : 0,
                 this.groupChangDecreseType2String(groupChange.decreaseType),
             );
         } else if (SysMessage.contentHead.type == 44 && SysMessage.body?.msgContent) {