I am interested in how this works. I started writing a postgres synchronizer. I got as far as hashing the data In the database but I need to write a synchroni

I am interested in how this works. I started writing a postgres synchronizer. I got as far as hashing the data In the database but I need to write a synchronization endpoint that does similar to a rolling hash to determine what data to send to other clients. One problem I encountered is detecting the winning write.