# 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    |