# Paradigm Shift - P2P2M Model

<figure><img src="/files/ldrKvpiX2PLKcxu4ycy5" alt=""><figcaption></figcaption></figure>

The Mandala upgrade introduces a significant paradigm shift in transaction handling by transitioning from a traditional **peer-to-transaction-processor-to-peer model (P2M2P)** to a **peer-to-peer-to-transaction-processor model (P2P2M)**. This transformation is crucial for achieving unbounded scalability for node clients.

The previous network topology struggled to extract sufficient information from the Teranode due to its optimization for massive throughput. Global listeners and indexers faced prohibitive costs and challenges in keeping pace with the growing transaction volume on BSV. The Mandala upgrade clarifies the roles of specialized actors within the system, **allowing nodes to focus on their essential functions as outlined in the six steps of Section 5 of the Bitcoin whitepaper**.

This architecture minimizes unnecessary data lookups and retrieval processes. The [**BEEF (Background Evaluation Extended Format)**](https://hub.bsvblockchain.org/bsv-skills-center/guides/sdks/concepts/beef) specification plays a pivotal role by enabling users to pass additional data, such as Merkle paths and full parent transactions, thereby alleviating the burden on transaction processors to retrieve data elements from the UTXO set. This enhancement **significantly boosts overall network efficiency.**


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