> For the complete documentation index, see [llms.txt](https://documentation.depinsubnet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.depinsubnet.com/subnet-node-type/master-node.md).

# 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.*