I nees flutter app developer

I have a website online wallet and I have its app. a website has already have escrow module now I need to add escrow module on the App too where by the money will be folded until the sender press on release payment for the meantime the receiver will see the pending payment which waits for release on his wallet, but also on the current transaction which wait for release there must be dispute button where by when clicked the sender, receiver and admin will be in the same chat where admin will listen to everyone explanation with ability to upload file, also admin will be able to release the money either to the sender or receiver in order to solve the dispute.