Return Promise from another action in store.js

Questions
1

Hello,
i’m call a store action from my view:

this.$store.dispatch('sync_db')
        .then(function (response) {
          self.$f7.dialog.close();
          console.log('finish-last');
        })
        .catch(function (error) {
          console.log(error);
        })

and in store.js have this:

sync_db({dispatch}){
				var rows_to_upd = [];
				return new Promise((resolve, reject) => {
					myDB.transaction(function(transaction) {
					transaction.executeSql('SELECT * FROM requests WHERE is_sync=0', [], function (tx, results) {
	          var len = results.rows.length, i;
	          for (i = 0; i < len; i++){
	           	rows_to_upd.push({ data: results.rows.item(i) });
	          }
						dispatch('sync_mysql', {rows_to_upd});
	        }, null);
					});
				})
			},
			sync_mysql({dispatch}, rows_to_upd){
					// return new Promise((resolve, reject) => {
							axios({url: 'http://xxx.php', data: rows_to_upd,
							auth: {
									username: 'xxx',
									password: 'xxx'
										},
							method: 'POST' })
							.then(function (response) {
								// console.log(response.data);
								dispatch('update_sqlite_sync', response.data);
								// resolve(response)
						})
							.catch(
								function (error) {
									// reject(error)
						})
					// })
			},
			update_sqlite_sync({dispatch}, sqlite_to_upd){
				const self = this;
				var rows = sqlite_to_upd.length, i;
				myDB.transaction(function(transaction) {
					console.log(rows);
					for(i=0; i < rows; i++){
						transaction.executeSql('UPDATE requests SET is_sync=1 WHERE uuid="'+sqlite_to_upd[i]+'"', [], function (tx, results) {
							console.log('ok update row sqlite');
						}, null);
					} // fine foreach
					return new Promise((resolve, reject) => {
						resolve('ok')
					})
					console.log('finish-update');
					resolve('ok');

				}); // fine myDB
			},

I need to return promise after action “update_sync” when have finished the loop and after i need to refresh page for display new info.

Thanks in advance

2 
let rows = results.rows
for(const row of rows) {
  await myAsyncFnc()
}
cosole.log('this will be called AFTER for loop')

edit:

you function must be async
eg

async function myfnc () {
  ...
  for(...) {
    await myFnc2()
  }
  ...
}
3

Thanks, i try your solution.