Bought something off TR before it went down. Used bitcoin 2 of 3 multisig. Just received the product a few days ago. Obviously the vendor sent it before the market went down. Is there a way I can release the funds to the vendor?
I know my wallet address and its public and private key, but that's about it.
Please contact the vendor (on a different market like Dream, or search his username on Grams, here) is a relevant poston how to find a vendor)
You had to set up a bitcoin public key in your market profile for multisig. It has a private key part, perhaps the easiest way is to send it to the vendor. The private key is corresponding to a bitcoin address, it shouldn't contain any coins but you can check it first.
You could also let the vendor know that they can release the funds even without having the redeemscript, they can more get help here if needed.