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params.go
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params.go
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package types
import (
"errors"
"fmt"
"strings"
yaml "gopkg.in/yaml.v2"
epochtypes "github.com/dymensionxyz/dymension-rdk/x/epochs/types"
sdk "github.com/cosmos/cosmos-sdk/types"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
)
// Parameter store keys.
var (
KeyMintDenom = []byte("MintDenom")
KeyMintEpochIdentifier = []byte("MintEpochIdentifier")
KeyMintStartEpoch = []byte("MintStartEpoch")
KeyInflationChangeEpochIdentifier = []byte("InflationChangeEpochIdentifier")
KeyInflationRateChange = []byte("InflationRateChange")
KeyTargetInflationRate = []byte("TargetInflationRate")
)
// ParamKeyTable for minting module.
func ParamKeyTable() paramtypes.KeyTable {
return paramtypes.NewKeyTable().RegisterParamSet(&Params{})
}
func NewParams(
mintDenom string, mintEpochIdentifier string,
mintStartEpoch int64, inflationEpochIdentifier string,
inflationRateChange sdk.Dec, targetInflationRate sdk.Dec,
) Params {
return Params{
MintDenom: mintDenom,
MintEpochIdentifier: mintEpochIdentifier,
MintStartEpoch: mintStartEpoch,
InflationChangeEpochIdentifier: inflationEpochIdentifier,
InflationRateChange: inflationRateChange,
TargetInflationRate: targetInflationRate,
}
}
// minting params
func DefaultParams() Params {
return Params{
MintDenom: sdk.DefaultBondDenom,
MintEpochIdentifier: "minute",
MintStartEpoch: 1,
InflationChangeEpochIdentifier: "year",
InflationRateChange: sdk.NewDecWithPrec(1, 2), // 1% annual inflation change
TargetInflationRate: sdk.NewDecWithPrec(2, 2), // 2%
}
}
// validate params.
func (p Params) Validate() error {
if err := validateMintDenom(p.MintDenom); err != nil {
return err
}
if err := epochtypes.ValidateEpochIdentifierInterface(p.MintEpochIdentifier); err != nil {
return err
}
if err := epochtypes.ValidateEpochIdentifierInterface(p.InflationChangeEpochIdentifier); err != nil {
return err
}
if err := validateInflationRate(p.InflationRateChange); err != nil {
return err
}
if err := validateInflationRate(p.TargetInflationRate); err != nil {
return err
}
return nil
}
// String implements the Stringer interface.
func (p Params) String() string {
out, _ := yaml.Marshal(p)
return string(out)
}
// Implements params.ParamSet.
func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs {
return paramtypes.ParamSetPairs{
paramtypes.NewParamSetPair(KeyMintDenom, &p.MintDenom, validateMintDenom),
paramtypes.NewParamSetPair(KeyMintEpochIdentifier, &p.MintEpochIdentifier, epochtypes.ValidateEpochIdentifierInterface),
paramtypes.NewParamSetPair(KeyInflationChangeEpochIdentifier, &p.InflationChangeEpochIdentifier, epochtypes.ValidateEpochIdentifierInterface),
paramtypes.NewParamSetPair(KeyMintStartEpoch, &p.MintStartEpoch, validateInt),
paramtypes.NewParamSetPair(KeyInflationRateChange, &p.InflationRateChange, validateInflationRate),
paramtypes.NewParamSetPair(KeyTargetInflationRate, &p.TargetInflationRate, validateInflationRate),
}
}
func validateMintDenom(i interface{}) error {
v, ok := i.(string)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if strings.TrimSpace(v) == "" {
return errors.New("mint denom cannot be blank")
}
if err := sdk.ValidateDenom(v); err != nil {
return err
}
return nil
}
func validateInt(i interface{}) error {
v, ok := i.(int64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v <= 0 {
return fmt.Errorf("value must be positive: %d", v)
}
return nil
}
func validateInflationRate(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.GT(sdk.NewDec(1)) {
return fmt.Errorf("inflation rate cannot be greater than 1")
}
if v.IsNegative() {
return fmt.Errorf("inflation rate cannot be negative")
}
return nil
}