GasLimit

GasLimit

GasLimit is measured in units of gas and set by the message sender. It imposes a hard limit on the amount of gas (i.e., number of units of gas) that a message’s execution should be allowed to consume on chain.

A message consumes gas for every fundamental operation it triggers, and a message that runs out of gas fails. When a message fails, every modification to the state that happened as a result of this message’s execution is reverted back to its previous state. Independently of whether a message execution was successful or not, the miner will receive a reward for the resources they consumed to execute the message (see GasPremium below).

GasFeeCap

GasFeeCap is the maximum price that the message sender is willing to pay per unit of gas (measured in attoFIL/gas unit). Together with the GasLimit, the GasFeeCap is setting the maximum amount of FIL that a sender will pay for a message: a sender is guaranteed that a message will never cost them more than GasLimit * GasFeeCap attoFIL (not including any Premium that the message includes for its recipient).