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params.go
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params.go
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package types
import (
"errors"
"fmt"
"strings"
sdk "github.com/furyaxyz/fuxchain/libs/cosmos-sdk/types"
"github.com/furyaxyz/fuxchain/libs/cosmos-sdk/x/params"
)
// Parameter store keys
var (
KeyMintDenom = []byte("MintDenom")
//KeyInflationRateChange = []byte("InflationRateChange")
//KeyInflationMax = []byte("InflationMax")
//KeyInflationMin = []byte("InflationMin")
//KeyGoalBonded = []byte("GoalBonded")
KeyBlocksPerYear = []byte("BlocksPerYear")
KeyDeflationRate = []byte("DeflationRate")
KeyDeflationEpoch = []byte("DeflationEpoch")
)
// mint parameters
type Params struct {
MintDenom string `json:"mint_denom" yaml:"mint_denom"` // type of coin to mint
InflationRateChange sdk.Dec `json:"inflation_rate_change" yaml:"inflation_rate_change"` // Deprecated: maximum annual change in inflation rate
InflationMax sdk.Dec `json:"inflation_max" yaml:"inflation_max"` // Deprecated: maximum inflation rate
InflationMin sdk.Dec `json:"inflation_min" yaml:"inflation_min"` // Deprecated: minimum inflation rate
GoalBonded sdk.Dec `json:"goal_bonded" yaml:"goal_bonded"` // Deprecated: goal of percent bonded atoms
BlocksPerYear uint64 `json:"blocks_per_year" yaml:"blocks_per_year"` // blocks per year according to one block per 3s
DeflationRate sdk.Dec `json:"deflation_rate" yaml:"deflation_rate"` // deflation rate every DeflationEpoch
DeflationEpoch uint64 `json:"deflation_epoch" yaml:"deflation_epoch"` // block number to deflate
}
// ParamTable for minting module.
func ParamKeyTable() params.KeyTable {
return params.NewKeyTable().RegisterParamSet(&Params{})
}
func NewParams(
mintDenom string, inflationRateChange, inflationMax, inflationMin, goalBonded sdk.Dec, blocksPerYear uint64,
deflationEpoch uint64, deflationRateChange sdk.Dec,
) Params {
return Params{
MintDenom: mintDenom,
BlocksPerYear: blocksPerYear,
DeflationRate: deflationRateChange,
DeflationEpoch: deflationEpoch,
}
}
// default minting module parameters
func DefaultParams() Params {
return Params{
MintDenom: sdk.DefaultBondDenom,
//InflationRateChange: sdk.NewDecWithPrec(13, 2),
//InflationMax: sdk.NewDecWithPrec(20, 2),
//InflationMin: sdk.NewDecWithPrec(7, 2),
//GoalBonded: sdk.NewDecWithPrec(67, 2),
BlocksPerYear: uint64(8304636), // assuming 3.8 second block times, uint64(60 * 60 * 8766 / 3.8)
DeflationRate: sdk.NewDecWithPrec(5, 1),
DeflationEpoch: 9, // 9 month
}
}
// validate params
func (p Params) Validate() error {
if err := validateMintDenom(p.MintDenom); err != nil {
return err
}
if err := validateDeflationRate(p.DeflationRate); err != nil {
return err
}
if err := validateDeflationEpoch(p.DeflationEpoch); err != nil {
return err
}
if err := validateBlocksPerYear(p.BlocksPerYear); err != nil {
return err
}
return nil
}
func (p Params) String() string {
return fmt.Sprintf(`Minting Params:
Mint Denom: %s
Deflation Rate Every %d Years: %s
Blocks Per Year: %d
`,
p.MintDenom, p.DeflationEpoch, p.DeflationRate, p.BlocksPerYear,
)
}
// Implements params.ParamSet
func (p *Params) ParamSetPairs() params.ParamSetPairs {
return params.ParamSetPairs{
params.NewParamSetPair(KeyMintDenom, &p.MintDenom, validateMintDenom),
params.NewParamSetPair(KeyBlocksPerYear, &p.BlocksPerYear, validateBlocksPerYear),
params.NewParamSetPair(KeyDeflationRate, &p.DeflationRate, validateDeflationRate),
params.NewParamSetPair(KeyDeflationEpoch, &p.DeflationEpoch, validateDeflationEpoch),
}
}
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 validateInflationRateChange(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("inflation rate change cannot be negative: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("inflation rate change too large: %s", v)
}
return nil
}
func validateInflationMax(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("max inflation cannot be negative: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("max inflation too large: %s", v)
}
return nil
}
func validateInflationMin(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("min inflation cannot be negative: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("min inflation too large: %s", v)
}
return nil
}
func validateGoalBonded(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("goal bonded cannot be negative: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("goal bonded too large: %s", v)
}
return nil
}
func validateBlocksPerYear(i interface{}) error {
v, ok := i.(uint64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v == 0 {
return fmt.Errorf("blocks per year must be positive: %d", v)
}
return nil
}
func validateDeflationRate(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("Deflation Rate be negative: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("Deflation Rate too large: %s", v)
}
return nil
}
func validateDeflationEpoch(i interface{}) error {
v, ok := i.(uint64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v == 0 {
return fmt.Errorf("Deflation Epoch must be positive: %d", v)
}
return nil
}