# State ## Parameters and Genesis State `Parameters` define the rate at which inflationary coins are minted and for how long inflationary periods last. ```go // Params governance parameters for kavadist module type Params struct { Active bool `json:"active" yaml:"active"` Periods Periods `json:"periods" yaml:"periods"` } // Period stores the specified start and end dates, and the inflation, expressed as a decimal representing the yearly APR of tokens that will be minted during that period type Period struct { Start time.Time `json:"start" yaml:"start"` // example "2020-03-01T15:20:00Z" End time.Time `json:"end" yaml:"end"` // example "2020-06-01T15:20:00Z" Inflation sdk.Dec `json:"inflation" yaml:"inflation"` // example "1.000000003022265980" - 10% inflation } ``` `GenesisState` defines the state that must be persisted when the blockchain stops/restarts in order for normal function of the kavadist module to resume. ```go // GenesisState is the state that must be provided at genesis. type GenesisState struct { Params Params `json:"params" yaml:"params"` PreviousBlockTime time.Time `json:"previous_block_time" yaml:"previous_block_time"` } ```