> For the complete documentation index, see [llms.txt](https://docs.infrablockchain.net/infrablockchain-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.infrablockchain.net/infrablockchain-docs/infrablockchain/learn/protocol.md).

# Protocol

### [System Token](/infrablockchain-docs/infrablockchain/learn/protocol/system-token.md)

All enterprises and public institutions using ***InfraBlockchain*** can issue a stable token backed by legal currency, known as the **system token**. This document covers the overall content regarding the system token, which plays an important role in the operation and consensus of InfraBlockchain.

### [Transaction Fee Model](/infrablockchain-docs/infrablockchain/learn/protocol/transaction-fee.md)

InfraBlockchain uses a token based on legal currency as a transaction fee. This document covers the overall content regarding InfraBlockchain's unique **transaction fee model**.

### [Proof of Transaction (PoT)](/infrablockchain-docs/infrablockchain/learn/protocol/proof-of-transaction.md)

This document covers the overall content regarding **Proof of Transaction (PoT)**, InfraBlockchain's unique consensus mechanism.