Regarding Holding BTC amount while transaction takes place?

Regarding Holding BTC amount while transaction takes place?

I am working with BTC transaction on my web platform and it's working fine and for security concern i am stuck at a point and like to discuss with you. So, my stuff is something like following;

There are 2 sides of my web platform ie (i) Front side and (ii) Admin side.

Now, i want to implement something like whenever any frontend user submit a request to transfer "X" BTC amount to "SOME_ADDRESS", so, that i want to build a secure connection like whenever admin found his requests satisfies all the normal criteria , he will approve this request and transferring funds actual takes place by blockchain.

So, mean while i want to build something like until and unless admin approves/reject the request till that time i want to freeze that BTC amount from user's account.

Thanks in advance...!!!

http://ift.tt/2A2r6Oj

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