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

# State

The x/feemarket module keeps in the state variable needed to the fee calculation:

Only BlockGasUsed in previous block needs to be tracked in state for the next base fee calculation.

| -            | Description           | Key         | Value              | Store |
| ------------ | --------------------- | ----------- | ------------------ | ----- |
| BlockGasUsed | gas used in the block | `[]byte{1}` | `[]byte{gas_used}` | KV    |