[feat] android support

src/ts/storage/mobileStorage.ts

@@ -0,0 +1,43 @@
+import * as CapFS from '@capacitor/filesystem'
+import { get } from 'svelte/store';
+import { DataBase } from './database';
+import { getUnpargeables } from './globalApi';
+
+export class MobileStorage{
+    async setItem(key:string, value:Uint8Array) {
+        await CapFS.Filesystem.writeFile({
+            path: key,
+            data: Buffer.from(value).toString('base64'),
+            directory: CapFS.Directory.External,
+            recursive: true,
+        })
+    }
+    async getItem(key:string):Promise<Buffer> {
+        try {
+            const b64 = await CapFS.Filesystem.readFile({
+                path: key,
+                directory: CapFS.Directory.External,   
+            })
+            return Buffer.from(b64.data as string, 'base64')
+        } catch (error) {
+            if(error){
+                if(error.message.includes(`does not exist`)){
+                    return null
+                }
+            }
+            throw error
+        }
+    }
+    async keys():Promise<string[]>{
+        let db = get(DataBase)
+        return getUnpargeables(db, 'pure')
+    }
+    async removeItem(key:string){
+        await CapFS.Filesystem.deleteFile({
+            path: key,
+            directory: CapFS.Directory.External,   
+        })
+    }
+
+    listItem = this.keys
+}