# Master Node

Master Nodes are integral components of the Subnet infrastructure, performing several critical functions:

**Transaction Management:**

* Store all Subnet transactions
* Validate all Subnet transactions

**Data Availability Layer (DAL):**

* Serve as the DAL for all Subnet Decentralized Applications
* Ensure data accessibility and integrity for the Subnet Ecosystem

**Cross-Network Operations:**

* Submit and Verify proofs between the Subnet and Mainnet
* Data Transmission between Subnet Protocols

**Reward Structure: Master Nodes receive compensation for their services through:**

* A portion of Subnet transaction fees
* Rewards for proof submission and verification between Subnet and Mainnet

*By fulfilling these roles, Master Nodes contribute to the security, reliability, and interoperability of the Subnet network, while also maintaining a connection with the main blockchain.*