Base Fee and Priority Fee

Base fee and priority fee are the two primary components of transaction costs on the Ethereum network. The base fee is a mandatory protocol-level charge required to include a transaction in a block, and it is burned to manage network supply.

The priority fee, often called a tip, is an optional amount paid directly to the validator to incentivize them to prioritize your specific transaction over others in the mempool. Together, these fees create a dynamic market where users can pay more to ensure faster inclusion during periods of high network congestion.

The base fee fluctuates automatically based on block demand, while the priority fee is determined by the user. This structure ensures that block space is allocated efficiently while maintaining economic security.

It prevents spam by making it costly to flood the network, as the base fee rises when blocks are full. Validators receive the priority fee as a reward for their work in proposing and validating blocks.

Understanding these fees is essential for managing gas costs effectively when interacting with decentralized applications. Proper fee estimation is crucial for avoiding failed transactions or overpaying during quiet periods.

This dual-fee model effectively separates the cost of network usage from the cost of expedited processing.