Bor v2.7.3 is a maintenance release that introduces important improvements for pruning and observability in the private transaction relay system.

Important Notice for Private Transaction Users: This release enforces a 10-minute hard Time-To-Live (TTL) on private transactions. If a transaction is not included in a block within this timeframe, it will be made public to the entire network.

Other key improvements in this version include:

Private Transaction Store Management: The release implements a more aggressive and efficient mechanism for purging transactions from the private store. This fixes a previous issue that could lead to unbounded memory growth on both relay and block producer nodes, thereby improving node stability.

Enhanced Observability and Debugging: The update brings better error tracking and additional logging for the relay process. It can now track the most common transaction submission errors, making it easier for node operators to diagnose and debug communication issues between relay nodes and block producers.