refactor(sdk): musicSdk 全量迁移至 TypeScript

musicSdk/mg/comment.ts

@@ -1,11 +1,12 @@
-import { httpFetch } from '../request.js'
-import getSongId from './songId.js'
-import { dateFormat2 } from '../index.js'
+import { httpFetch } from '../request.ts'
+import getSongId from './songId.ts'
+import { dateFormat2 } from '../index.ts'
+import type { HttpRequestObject } from '../types.ts'
 
 export default {
-  _requestObj: null,
-  _requestObj2: null,
-  _requestObj3: null,
+  _requestObj: null as HttpRequestObject | null,
+  _requestObj2: null as HttpRequestObject | null,
+  _requestObj3: null as HttpRequestObject | null,
   lastCommentIds: new Map(),
   async getComment(musicInfo, page = 1, limit = 20) {
     if (this._requestObj) this._requestObj.cancelHttp()

musicSdk/mg/hotSearch.ts

@@ -1,7 +1,8 @@
-import { httpFetch } from '../request.js'
+import { httpFetch } from '../request.ts'
+import type { HttpRequestObject } from '../types.ts'
 
 export default {
-  _requestObj: null,
+  _requestObj: null as HttpRequestObject | null,
   async getList(retryNum = 0) {
     if (this._requestObj) this._requestObj.cancelHttp()
     if (retryNum > 2) return Promise.reject(new Error('try max num'))

musicSdk/mg/index.ts

@@ -1,12 +1,12 @@
-import { apis } from '../api-source.js'
-import leaderboard from './leaderboard.js'
-import songList from './songList.js'
-import musicSearch from './musicSearch.js'
-import pic from './pic.js'
-import lyric from './lyric.js'
-import hotSearch from './hotSearch.js'
-import comment from './comment.js'
-// import tipSearch from './tipSearch.js'
+import { apis } from '../api-source.ts'
+import leaderboard from './leaderboard.ts'
+import songList from './songList.ts'
+import musicSearch from './musicSearch.ts'
+import pic from './pic.ts'
+import lyric from './lyric.ts'
+import hotSearch from './hotSearch.ts'
+import comment from './comment.ts'
+// import tipSearch from './tipSearch.ts'
 
 const mg = {
   // tipSearch,
@@ -16,7 +16,7 @@ const mg = {
   hotSearch,
   comment,
   getMusicUrl(songInfo, type) {
-    return apis('mg').getMusicUrl(songInfo, type)
+    return apis('mg').getMusicUrl!(songInfo, type)
   },
   getLyric(songInfo) {
     return lyric.getLyric(songInfo)

musicSdk/mg/leaderboard.ts

@@ -1,5 +1,6 @@
-import { httpFetch } from '../request.js'
-import { filterMusicInfoList } from './musicInfo.js'
+import { httpFetch } from '../request.ts'
+import { filterMusicInfoList } from './musicInfo.ts'
+import type { Source, HttpRequestObject } from '../types.ts'
 
 // const boardList = [{ id: 'mg__27553319', name: '咪咕尖叫新歌榜', bangid: '27553319' }, { id: 'mg__27186466', name: '咪咕尖叫热歌榜', bangid: '27186466' }, { id: 'mg__27553408', name: '咪咕尖叫原创榜', bangid: '27553408' }, { id: 'mg__23189800', name: '咪咕港台榜', bangid: '23189800' }, { id: 'mg__23189399', name: '咪咕内地榜', bangid: '23189399' }, { id: 'mg__19190036', name: '咪咕欧美榜', bangid: '19190036' }, { id: 'mg__23189813', name: '咪咕日韩榜', bangid: '23189813' }, { id: 'mg__23190126', name: '咪咕彩铃榜', bangid: '23190126' }, { id: 'mg__15140045', name: '咪咕KTV榜', bangid: '15140045' }, { id: 'mg__15140034', name: '咪咕网络榜', bangid: '15140034' }, { id: 'mg__23217754', name: 'MV榜', bangid: '23217754' }, { id: 'mg__23218151', name: '新专辑榜', bangid: '23218151' }, { id: 'mg__21958042', name: 'iTunes榜', bangid: '21958042' }, { id: 'mg__21975570', name: 'billboard榜', bangid: '21975570' }, { id: 'mg__22272815', name: '台湾Hito中文榜', bangid: '22272815' }, { id: 'mg__22272904', name: '中国TOP排行榜', bangid: '22272904' }, { id: 'mg__22272943', name: '韩国Melon榜', bangid: '22272943' }, { id: 'mg__22273437', name: '英国UK榜', bangid: '22273437' }]
 
@@ -20,7 +21,15 @@ import { filterMusicInfoList } from './musicInfo.js'
 //   // { id: 'mg__22272943', name: '韩国Melon榜', bangid: '22272943', webId: 'mnet' },
 //   // { id: 'mg__22273437', name: '英国UK榜', bangid: '22273437', webId: 'uk' },
 // ]
-const boardList = [
+interface BoardItem {
+  id: string
+  name: string
+  bangid: string
+  source: Source
+  // 旧数据字段，部分条目缺失（缺失时 getDetailPageUrl 拼出 undefined，与原实现一致）
+  webId?: string
+}
+const boardList: BoardItem[] = [
   {
     id: 'mg__27553319',
     name: '新歌榜',
@@ -141,9 +150,9 @@ export default {
     // return `http://m.music.migu.cn/migu/remoting/cms_list_tag?nid=${id}&pageSize=${this.limit}&pageNo=${page - 1}`
   },
   successCode: '000000',
-  requestBoardsObj: null,
+  requestBoardsObj: null as HttpRequestObject | null,
   getBoardsData() {
-    if (this.requestBoardsObj) this._requestBoardsObj.cancelHttp()
+    if (this.requestBoardsObj) (this as any)._requestBoardsObj.cancelHttp()
     this.requestBoardsObj = httpFetch('https://app.c.nf.migu.cn/pc/bmw/rank/rank-index/v1.0', {
     // this.requestBoardsObj = httpFetch('https://app.c.nf.migu.cn/MIGUM3.0/v1.0/template/rank-list/release', {
     // this.requestBoardsObj = httpFetch('https://app.c.nf.migu.cn/MIGUM2.0/v2.0/content/indexrank.do?templateVersion=8', {
@@ -153,7 +162,7 @@ export default {
         channel: '0146921',
       },
     })
-    return this.requestBoardsObj.promise
+    return this.requestBoardsObj!.promise
   },
   getData(url) {
     const requestObj = httpFetch(url)

musicSdk/mg/lyric.ts

@@ -1,6 +1,6 @@
-import { httpFetch } from '../request.js'
-import { getMusicInfo } from './musicInfo.js'
-import { decrypt } from './utils/mrc.js'
+import { httpFetch } from '../request.ts'
+import { getMusicInfo } from './musicInfo.ts'
+import { decrypt } from './utils/mrc.ts'
 
 const mrcTools = {
   rxps: {
@@ -11,8 +11,8 @@ const mrcTools = {
   parseLyric(str) {
     str = str.replace(/\r/g, '')
     const lines = str.split('\n')
-    const lxlrcLines = []
-    const lrcLines = []
+    const lxlrcLines: string[] = []
+    const lrcLines: string[] = []
 
     for (const line of lines) {
       if (line.length < 6) continue
@@ -20,12 +20,12 @@ const mrcTools = {
       if (!result) continue
 
       const startTime = parseInt(result[1])
-      let time = startTime
+      let time: any = startTime
       let ms = time % 1000
       time /= 1000
-      let m = parseInt(time / 60).toString().padStart(2, '0')
+      let m = parseInt((time / 60) as unknown as string).toString().padStart(2, '0')
       time %= 60
-      let s = parseInt(time).toString().padStart(2, '0')
+      let s = parseInt(time as unknown as string).toString().padStart(2, '0')
       time = `${m}:${s}.${ms}`
 
       let words = line.replace(this.rxps.lineTime, '')
@@ -36,7 +36,7 @@ const mrcTools = {
       if (!times) continue
       times = times.map(time => {
         const result = /\((\d+),(\d+)\)/.exec(time)
-        return `<${parseInt(result[1]) - startTime},${result[2]}>`
+        return `<${parseInt(result![1]) - startTime},${result![2]}>`
       })
       const wordArr = words.split(this.rxps.wordTime)
       const newWords = times.map((time, index) => `${time}${wordArr[index]}`).join('')

musicSdk/mg/musicInfo.ts

@@ -1,10 +1,11 @@
-import { sizeFormate, formatPlayTime } from '../index.js'
-import { createHttpFetch } from './utils/index.js'
-import { formatSingerName } from '../utils.js'
+import { sizeFormate, formatPlayTime } from '../index.ts'
+import { createHttpFetch } from './utils/index.ts'
+import { formatSingerName } from '../utils.ts'
+import type { SongInfo, SongType, QualityInfo, Quality } from '../types.ts'
 
-const createGetMusicInfosTask = (ids) => {
+const createGetMusicInfosTask = (ids: Array<string | undefined>) => {
   let list = ids
-  let tasks = []
+  const tasks: Array<Array<string | undefined>> = []
   while (list.length) {
     tasks.push(list.slice(0, 100))
     if (list.length < 100) break
@@ -19,15 +20,15 @@ const createGetMusicInfosTask = (ids) => {
   }).then(data => data.resource)))
 }
 
-export const filterMusicInfoList = (rawList) => {
+export const filterMusicInfoList = (rawList: any[]): SongInfo[] => {
   // console.log(rawList)
   let ids = new Set()
-  const list = []
+  const list: any[] = []
   rawList.forEach(item => {
     if (!item.songId || ids.has(item.songId)) return
     ids.add(item.songId)
-    const types = []
-    const _types = {}
+    const types: SongType[] = []
+    const _types: Partial<Record<Quality, QualityInfo>> = {}
     item.newRateFormats?.forEach(type => {
       let size
       switch (type.formatType) {
@@ -90,12 +91,12 @@ export const filterMusicInfoList = (rawList) => {
 export const filterMusicInfoListV5 = (rawList) => {
   // console.log(rawList)
   let ids = new Set()
-  const list = []
+  const list: any[] = []
   rawList.forEach(item => {
     if (!item.songId || ids.has(item.songId)) return
     ids.add(item.songId)
-    const types = []
-    const _types = {}
+    const types: SongType[] = []
+    const _types: Partial<Record<Quality, QualityInfo>> = {}
     item.audioFormats?.forEach(type => {
       let size
       switch (type.formatType) {
@@ -153,10 +154,10 @@ export const filterMusicInfoListV5 = (rawList) => {
   return list
 }
 
-export const getMusicInfo = async(copyrightId) => {
+export const getMusicInfo = async(copyrightId?: string): Promise<SongInfo | undefined> => {
   return getMusicInfos([copyrightId]).then(data => data[0])
 }
 
-export const getMusicInfos = async(copyrightIds) => {
+export const getMusicInfos = async(copyrightIds: Array<string | undefined>): Promise<SongInfo[]> => {
   return filterMusicInfoList((await createGetMusicInfosTask(copyrightIds)).flat())
 }

musicSdk/mg/musicSearch.ts

@@ -1,8 +1,9 @@
-import { httpFetch } from '../request.js'
-import { sizeFormate, formatPlayTime } from '../index.js'
-import { toMD5, formatSingerName } from '../utils.js'
+import { httpFetch } from '../request.ts'
+import { sizeFormate, formatPlayTime } from '../index.ts'
+import { toMD5, formatSingerName } from '../utils.ts'
+import type { SongType, QualityInfo, Quality } from '../types.ts'
 
-export const createSignature = (time, str) => {
+export const createSignature = (time: string, str: string): { sign: string, deviceId: string } => {
   const deviceId = '963B7AA0D21511ED807EE5846EC87D20'
   const signatureMd5 = '6cdc72a439cef99a3418d2a78aa28c73'
   const sign = toMD5(`${str}${signatureMd5}yyapp2d16148780a1dcc7408e06336b98cfd50${deviceId}${time}`)
@@ -126,7 +127,7 @@ export default {
   },
   filterData(rawData) {
     // console.log(rawData)
-    const list = []
+    const list: any[] = []
     const ids = new Set()
 
     rawData.forEach(item => {
@@ -134,8 +135,8 @@ export default {
         if (!data.songId || !data.copyrightId || ids.has(data.copyrightId)) return
         ids.add(data.copyrightId)
 
-        const types = []
-        const _types = {}
+        const types: SongType[] = []
+        const _types: Partial<Record<Quality, QualityInfo>> = {}
         data.audioFormats && data.audioFormats.forEach(type => {
           let size
           switch (type.formatType) {

musicSdk/mg/pic.ts

@@ -1,5 +1,5 @@
-import { httpFetch } from '../request.js'
-import getSongId from './songId.js'
+import { httpFetch } from '../request.ts'
+import getSongId from './songId.ts'
 
 export default {
   async getPicUrl(songId, tryNum = 0) {
@@ -11,7 +11,7 @@ export default {
     requestObj.promise.then(({ body }) => {
       if (body.returnCode !== '000000') {
         if (tryNum > 5) return Promise.reject(new Error('图片获取失败'))
-        let tryRequestObj = this.getPic(songId, ++tryNum)
+        let tryRequestObj = (this as any).getPic(songId, ++tryNum)
         requestObj.cancelHttp = tryRequestObj.cancelHttp.bind(tryRequestObj)
         return tryRequestObj.promise
       }

musicSdk/mg/songId.ts

@@ -1,10 +1,11 @@
 // import { httpFetch } from '../request.js'
-import { getMusicInfo } from './musicInfo.js'
+import { getMusicInfo } from './musicInfo.ts'
+import type { SongInfo } from '../types.ts'
 
-const getSongId = async(mInfo) => {
+const getSongId = async(mInfo: SongInfo): Promise<string | undefined> => {
   if (mInfo.songmid != mInfo.copyrightId) return mInfo.songmid
   const musicInfo = await getMusicInfo(mInfo.copyrightId)
-  return musicInfo.songmid
+  return musicInfo!.songmid
 }
 
 

musicSdk/mg/songList.ts

@@ -1,14 +1,15 @@
-import { httpFetch } from '../request.js'
-import { formatPlayCount } from '../index.js'
-import { filterMusicInfoListV5 } from './musicInfo.js'
-import { createSignature } from './musicSearch.js'
-import { createHttpFetch } from './utils/index.js'
+import { httpFetch } from '../request.ts'
+import { formatPlayCount } from '../index.ts'
+import { filterMusicInfoListV5 } from './musicInfo.ts'
+import { createSignature } from './musicSearch.ts'
+import { createHttpFetch } from './utils/index.ts'
+import type { HttpRequestObject } from '../types.ts'
 
 // const tagData = { code: '000000', info: 'SUCCESS', columnInfo: { columnTitle: '分类', columnId: '15244430', columnPid: '15031270', opNumItem: { playNum: 0, playNumDesc: '0', keepNum: 0, keepNumDesc: '0', commentNum: 0, commentNumDesc: '0', shareNum: 0, shareNumDesc: '0', orderNumByWeek: 0, orderNumByWeekDesc: '0', orderNumByTotal: 0, orderNumByTotalDesc: '0', thumbNum: 0, thumbNumDesc: '0', followNum: 0, followNumDesc: '0', subscribeNum: 0, subscribeNumDesc: '0', livePlayNum: 0, livePlayNumDesc: '0', popularNum: 0, popularNumDesc: '0', bookingNum: 0, bookingNumDesc: '0' }, contentsCount: 6, columnStatus: 1, columnCreateTime: '2016-11-10 10:53:05.077', columntype: 2011, contents: [{ contentId: '18464615', relationType: 2011, objectInfo: { columnTitle: '热门', columnId: '18464615', columnPid: '15244430', opNumItem: { playNum: 0, playNumDesc: '0', keepNum: 0, keepNumDesc: '0', commentNum: 0, commentNumDesc: '0', shareNum: 0, shareNumDesc: '0', orderNumByWeek: 0, orderNumByWeekDesc: '0', orderNumByTotal: 0, orderNumByTotalDesc: '0', thumbNum: 0, thumbNumDesc: '0', followNum: 0, followNumDesc: '0', subscribeNum: 0, subscribeNumDesc: '0', livePlayNum: 0, livePlayNumDesc: '0', popularNum: 0, popularNumDesc: '0', bookingNum: 0, bookingNumDesc: '0' }, contentsCount: 8, columnStatus: 1, columnCreateTime: '2017-02-20 16:09:13.400', columntype: 2011, contents: [{ contentId: '1000001672', relationType: 4034, objectInfo: { tagId: '1000001672', tagName: '流行', resourceType: '2034' }, relationSort: 9 }, { contentId: '1003449727', relationType: 4034, objectInfo: { tagId: '1003449727', tagName: '厂牌', resourceType: '2034' }, relationSort: 8 }, { contentId: '1000001795', relationType: 4034, objectInfo: { tagId: '1000001795', tagName: '伤感', resourceType: '2034' }, relationSort: 7 }, { contentId: '1001076080', relationType: 4034, objectInfo: { tagId: '1001076080', tagName: '电影', resourceType: '2034' }, relationSort: 6 }, { contentId: '1000001675', relationType: 4034, objectInfo: { tagId: '1000001675', tagName: '中国风', resourceType: '2034' }, relationSort: 5 }, { contentId: '1000001635', relationType: 4034, objectInfo: { tagId: '1000001635', tagName: '经典老歌', resourceType: '2034' }, relationSort: 4 }, { contentId: '1000001831', relationType: 4034, objectInfo: { tagId: '1000001831', tagName: '翻唱', resourceType: '2034' }, relationSort: 3 }, { contentId: '1000001762', relationType: 4034, objectInfo: { tagId: '1000001762', tagName: '国语', resourceType: '2034' }, relationSort: 1 }], dataVersion: '1620410266029', customizedPicUrls: [] }, relationSort: 6 }, { contentId: '15244503', relationType: 2011, objectInfo: { columnTitle: '主题', columnId: '15244503', columnPid: '15244430', opNumItem: { playNum: 0, playNumDesc: '0', keepNum: 0, keepNumDesc: '0', commentNum: 0, commentNumDesc: '0', shareNum: 0, shareNumDesc: '0', orderNumByWeek: 0, orderNumByWeekDesc: '0', orderNumByTotal: 0, orderNumByTotalDesc: '0', thumbNum: 0, thumbNumDesc: '0', followNum: 0, followNumDesc: '0', subscribeNum: 0, subscribeNumDesc: '0', livePlayNum: 0, livePlayNumDesc: '0', popularNum: 0, popularNumDesc: '0', bookingNum: 0, bookingNumDesc: '0' }, contentsCount: 23, columnStatus: 1, columnCreateTime: '2016-11-10 10:54:10.261', columntype: 2011, contents: [{ contentId: '1003449727', relationType: 4034, objectInfo: { tagId: '1003449727', tagName: '厂牌', resourceType: '2034' }, relationSort: 29 }, { contentId: '1001076080', relationType: 4034, objectInfo: { tagId: '1001076080', tagName: '电影', resourceType: '2034' }, relationSort: 28 }, { contentId: '1001076078', relationType: 4034, objectInfo: { tagId: '1001076078', tagName: '电视剧', resourceType: '2034' }, relationSort: 27 }, { contentId: '1001076083', relationType: 4034, objectInfo: { tagId: '1001076083', tagName: '综艺', resourceType: '2034' }, relationSort: 26 }, { contentId: '1000001827', relationType: 4034, objectInfo: { tagId: '1000001827', tagName: 'KTV', resourceType: '2034' }, relationSort: 23 }, { contentId: '1000001698', relationType: 4034, objectInfo: { tagId: '1000001698', tagName: '爱情', resourceType: '2034' }, relationSort: 22 }, { contentId: '1000001635', relationType: 4034, objectInfo: { tagId: '1000001635', tagName: '经典老歌', resourceType: '2034' }, relationSort: 21 }, { contentId: '1001076096', relationType: 4034, objectInfo: { tagId: '1001076096', tagName: '网络热歌', resourceType: '2034' }, relationSort: 20 }, { contentId: '1000001780', relationType: 4034, objectInfo: { tagId: '1000001780', tagName: '儿童歌曲', resourceType: '2034' }, relationSort: 19 }, { contentId: '1000587702', relationType: 4034, objectInfo: { tagId: '1000587702', tagName: '广场舞', resourceType: '2034' }, relationSort: 18 }, { contentId: '1000587717', relationType: 4034, objectInfo: { tagId: '1000587717', tagName: '70后', resourceType: '2034' }, relationSort: 17 }, { contentId: '1000587718', relationType: 4034, objectInfo: { tagId: '1000587718', t
Line truncated
 
 export default {
-  _requestObj_tags: null,
-  _requestObj_list: null,
+  _requestObj_tags: null as HttpRequestObject | null,
+  _requestObj_list: null as HttpRequestObject | null,
   limit_list: 30,
   limit_song: 50,
   successCode: '000000',
@@ -200,7 +201,7 @@ export default {
     //     source: 'mg',
     //   }
     // })
-    return this._requestObj_list.promise.then(({ body }) => {
+    return this._requestObj_list!.promise.then(({ body }) => {
       // console.log(body)
       // if (body.retCode !== '000000') return this.getList(sortId, tagId, page, ++tryNum)
       if (body.code !== '000000') return this.getList(sortId, tagId, page, ++tryNum)
@@ -214,7 +215,7 @@ export default {
       }
     })
   },
-  filterList2(listData, list = [], ids = new Set()) {
+  filterList2(listData, list: any[] = [], ids = new Set()) {
     for (const item of listData) {
       if (item.contents) this.filterList2(item.contents, list, ids)
       else if (item.resType == '2021' && !ids.has(item.resId)) {
@@ -255,7 +256,7 @@ export default {
     if (this._requestObj_tags) this._requestObj_tags.cancelHttp()
     if (tryNum > 2) return Promise.reject(new Error('try max num'))
     this._requestObj_tags = httpFetch(this.tagsUrl, { headers: this.defaultHeaders })
-    return this._requestObj_tags.promise.then(({ body }) => {
+    return this._requestObj_tags!.promise.then(({ body }) => {
       if (body.code !== this.successCode) return this.getTag(++tryNum)
       // console.log(body)
       return this.filterTagInfo(body.data)
@@ -314,7 +315,7 @@ export default {
   },
 
   filterSongListResult(raw) {
-    const list = []
+    const list: any[] = []
     raw.forEach(item => {
       if (!item.id) return
 

musicSdk/mg/tipSearch.ts

@@ -1,7 +1,7 @@
-import { createHttpFetch } from './utils/index.js'
+import { createHttpFetch } from './utils/index.ts'
 
 export default {
-  requestObj: null,
+  requestObj: null as any,
   cancelTipSearch() {
     if (this.requestObj && this.requestObj.cancelHttp) this.requestObj.cancelHttp()
   },

musicSdk/mg/utils/index.ts

@@ -1,4 +1,5 @@
-import { httpFetch } from '../../request.js'
+import { httpFetch } from '../../request.ts'
+import type { HttpOptions } from '../../types.ts'
 
 /**
  * 创建一个适用于MG的Http请求
@@ -6,7 +7,7 @@ import { httpFetch } from '../../request.js'
  * @param {*} options
  * @param {*} retryNum
  */
-export const createHttpFetch = async(url, options, retryNum = 0) => {
+export const createHttpFetch = async(url: string, options?: HttpOptions, retryNum = 0): Promise<any> => {
   if (retryNum > 2) throw new Error('try max num')
   let result
   try {

musicSdk/mg/utils/mrc.ts

@@ -16,7 +16,7 @@ const keyArr = [
 ]
 
 
-const teaDecrypt = (data, key) => {
+const teaDecrypt = (data: bigint[], key: bigint[]): bigint[] => {
   const length = data.length
   const lengthBitint = BigInt(length)
   if (length >= 1) {
@@ -31,14 +31,14 @@ const teaDecrypt = (data, key) => {
       while (true) {
         j6--
         if (j6 > 0n) {
-          let j7 = data[(j6 - 1n)]
-          let i = j6
-          j2 = toLong(data[i] - (toLong(toLong(j2 ^ j4) + toLong(j7 ^ key[toLong(toLong(3n & j6) ^ j5)])) ^ toLong(toLong(toLong(j7 >> 5n) ^ toLong(j2 << 2n)) + toLong(toLong(j2 >> 3n) ^ toLong(j7 << 4n)))))
+          let j7 = data[(j6 - 1n) as unknown as number]
+          let i = j6 as unknown as number
+          j2 = toLong(data[i] - (toLong(toLong(j2 ^ j4) + toLong(j7 ^ key[toLong(toLong(3n & j6) ^ j5) as unknown as number])) ^ toLong(toLong(toLong(j7 >> 5n) ^ toLong(j2 << 2n)) + toLong(toLong(j2 >> 3n) ^ toLong(j7 << 4n)))))
           data[i] = j2
         } else break
       }
-      let j8 = data[lengthBitint - 1n]
-      j2 = toLong(data[0n] - toLong(toLong(toLong(key[toLong(toLong(j6 & 3n) ^ j5)] ^ j8) + toLong(j2 ^ j4)) ^ toLong(toLong(toLong(j8 >> 5n) ^ toLong(j2 << 2n)) + toLong(toLong(j2 >> 3n) ^ toLong(j8 << 4n)))))
+      let j8 = data[lengthBitint - 1n as unknown as number]
+      j2 = toLong(data[0n as unknown as number] - toLong(toLong(toLong(key[toLong(toLong(j6 & 3n) ^ j5) as unknown as number] ^ j8) + toLong(j2 ^ j4)) ^ toLong(toLong(toLong(j8 >> 5n) ^ toLong(j2 << 2n)) + toLong(toLong(j2 >> 3n) ^ toLong(j8 << 4n)))))
       data[0] = j2
       j3 = toLong(j4 - DELTA)
     }
@@ -46,26 +46,26 @@ const teaDecrypt = (data, key) => {
   return data
 }
 
-const longArrToString = (data) => {
-  const arrayList = []
+const longArrToString = (data: bigint[]): string => {
+  const arrayList: string[] = []
   for (const j of data) arrayList.push(longToBytes(j).toString('utf16le'))
   return arrayList.join('')
 }
 
 // https://stackoverflow.com/a/29132118
-const longToBytes = (l) => {
+const longToBytes = (l: bigint): Buffer => {
   const result = Buffer.alloc(8)
   for (let i = 0; i < 8; i++) {
-    result[i] = parseInt(l & 0xFFn)
+    result[i] = parseInt((l & 0xFFn) as unknown as string)
     l >>= 8n
   }
   return result
 }
 
 
-const toBigintArray = (data) => {
+const toBigintArray = (data: string): bigint[] => {
   const length = Math.floor(data.length / 16)
-  const jArr = Array(length)
+  const jArr: bigint[] = Array(length)
   for (let i = 0; i < length; i++) {
     jArr[i] = toLong(data.substring(i * 16, (i * 16) + 16))
   }
@@ -75,14 +75,14 @@ const toBigintArray = (data) => {
 // https://github.com/lyswhut/lx-music-desktop/issues/445#issuecomment-1139338682
 const MAX = 9223372036854775807n
 const MIN = -9223372036854775808n
-const toLong = str => {
+const toLong = (str: string | bigint): bigint => {
   const num = typeof str == 'string' ? BigInt('0x' + str) : str
   if (num > MAX) return toLong(num - (1n << 64n))
   else if (num < MIN) return toLong(num + (1n << 64n))
   return num
 }
 
-export const decrypt = (data) => {
+export const decrypt = (data: string | null): string | null => {
   // console.log(data.length)
   // -3551594764563790630
   // console.log(toLongArrayFromArr(Buffer.from(key)))