Hello guys,

I am in the works of creating a bitcoin auction site.

I'm having a lot of trouble understanding how to make a multi signature escrow system.

Heres what Im looking for:

When a user wants to purchase item he has to pay 1% commision fee then he sends his bitcoins to a escrow address. I want there to be 3 possible signatures, with two being enough to send the payment through to the vendor.

The buyer gets 1 signature, the vendor gets 1 signature, and we get 1 signature.

Are there wallets that support this?

Does a system like this already exist?

Would anyone be interested in building one, or explaining to me how to do it for some Bitcoins?

Appreciate it!