Need a programmer for a specific problem (paid work)

[TheOnly1]

I need a solution for this probem:

Transactions from an online wallet (like blockchain wallet) shall only be allowed to BTC addresses with a specific prefix.
Example: A wallet can only send BTC to addresses which starts with 1g9.
Think this should be possible via API, but I am not a specialist.

Please contact me via PM.

[nahtnam]

I need a solution for this probem:

Transactions from an online wallet (like blockchain wallet) shall only be allowed to BTC addresses with a specific prefix.
Example: A wallet can only send BTC to addresses which starts with 1g9.
Think this should be possible via API, but I am not a specialist.

Please contact me via PM.

Its very simple. Get the transaction info. Scrape the addresses. Check if the addresses start with 1g9. Simple!

[TheOnly1]

It must be automatic.
And of course it must prevent transactions before they happen.
Not so simple as you think.

[nahtnam]

It must be automatic.
And of course it must prevent transactions before they happen.
Not so simple as you think.

You cant block people from sending money to you.

[bitsmichel]

You cant block people from sending money to you.

Its from an online wallet ,so it should be possible using client-side and server-side verification.

How much do you offer?

[TheOnly1]

@nahtnam
Please stop writing in this thread. It seems you dont understand what I am talking about and I am sure you cant help me.

@bitsmichel
So you think you are able to realize this? I will pay depending on how much outlay it is for you. I am expectng the most simple, basic and cheap solution. No extras needed. I have offers from other programmers already.
Please answer on PM, will pay in BTC.