/
params.go
219 lines (176 loc) · 5.87 KB
/
params.go
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package types
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
"github.com/petri-labs/kaiju/types"
"gopkg.in/yaml.v2"
)
// Parameter keys
var (
KeyVotePeriod = []byte("VotePeriod")
KeyVoteThreshold = []byte("VoteThreshold")
KeyRewardBand = []byte("RewardBand")
KeyRewardDistributionWindow = []byte("RewardDistributionWindow")
KeySlashFraction = []byte("SlashFraction")
KeySlashWindow = []byte("SlashWindow")
KeyMinValidPerWindow = []byte("MinValidPerWindow")
)
// Default parameter values
const (
DefaultVotePeriod = types.BlocksPerMinute // 60 seconds
DefaultSlashWindow = types.BlocksPerWeek // slash window for a week
DefaultRewardDistributionWindow = types.BlocksPerYear // reward distribution window for a year
)
// Default parameter values
var (
DefaultVoteThreshold = sdk.NewDecWithPrec(50, 2) // 50%
DefaultRewardBand = sdk.NewDecWithPrec(2, 2) // 2% (-1, 1)
DefaultSlashFraction = sdk.NewDecWithPrec(1, 4) // 0.01%
DefaultMinValidPerWindow = sdk.NewDecWithPrec(5, 2) // 5%
)
var _ paramtypes.ParamSet = (*Params)(nil)
// ParamKeyTable the param key table for launch module
func ParamKeyTable() paramtypes.KeyTable {
return paramtypes.NewKeyTable().RegisterParamSet(&Params{})
}
// NewParams creates a new Params instance
func NewParams() Params {
return Params{}
}
// DefaultParams returns a default set of parameters
func DefaultParams() Params {
return Params{
VotePeriod: DefaultVotePeriod,
VoteThreshold: DefaultVoteThreshold,
RewardBand: DefaultRewardBand,
RewardDistributionWindow: DefaultRewardDistributionWindow,
SlashFraction: DefaultSlashFraction,
SlashWindow: DefaultSlashWindow,
MinValidPerWindow: DefaultMinValidPerWindow,
}
}
// ParamSetPairs get the params.ParamSet
func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs {
return paramtypes.ParamSetPairs{
paramtypes.NewParamSetPair(KeyVotePeriod, &p.VotePeriod, validateVotePeriod),
paramtypes.NewParamSetPair(KeyVoteThreshold, &p.VoteThreshold, validateVoteThreshold),
paramtypes.NewParamSetPair(KeyRewardBand, &p.RewardBand, validateRewardBand),
paramtypes.NewParamSetPair(KeyRewardDistributionWindow, &p.RewardDistributionWindow, validateRewardDistributionWindow),
paramtypes.NewParamSetPair(KeySlashFraction, &p.SlashFraction, validateSlashFraction),
paramtypes.NewParamSetPair(KeySlashWindow, &p.SlashWindow, validateSlashWindow),
paramtypes.NewParamSetPair(KeyMinValidPerWindow, &p.MinValidPerWindow, validateMinValidPerWindow),
}
}
// Validate validates the set of params
func (p Params) Validate() error {
if p.VotePeriod == 0 {
return fmt.Errorf("oracle parameter VotePeriod must be > 0, is %d", p.VotePeriod)
}
if p.VoteThreshold.LTE(sdk.NewDecWithPrec(33, 2)) {
return fmt.Errorf("oracle parameter VoteThreshold must be greater than 33 percent")
}
if p.RewardBand.GT(sdk.OneDec()) || p.RewardBand.IsNegative() {
return fmt.Errorf("oracle parameter RewardBand must be between [0, 1]")
}
if p.RewardDistributionWindow < p.VotePeriod {
return fmt.Errorf("oracle parameter RewardDistributionWindow must be greater than or equal with VotePeriod")
}
if p.SlashFraction.GT(sdk.OneDec()) || p.SlashFraction.IsNegative() {
return fmt.Errorf("oracle parameter SlashFraction must be between [0, 1]")
}
if p.SlashWindow < p.VotePeriod {
return fmt.Errorf("oracle parameter SlashWindow must be greater than or equal with VotePeriod")
}
if p.MinValidPerWindow.GT(sdk.OneDec()) || p.MinValidPerWindow.IsNegative() {
return fmt.Errorf("oracle parameter MinValidPerWindow must be between [0, 1]")
}
return nil
}
// String implements the Stringer interface.
func (p Params) String() string {
out, _ := yaml.Marshal(p)
return string(out)
}
func validateVotePeriod(i interface{}) error {
v, ok := i.(uint64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v == 0 {
return fmt.Errorf("vote period must be positive: %d", v)
}
return nil
}
func validateVoteThreshold(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.LT(sdk.NewDecWithPrec(33, 2)) {
return fmt.Errorf("vote threshold must be bigger than 33%%: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("vote threshold too large: %s", v)
}
return nil
}
func validateRewardBand(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("reward band must be positive: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("reward band is too large: %s", v)
}
return nil
}
func validateRewardDistributionWindow(i interface{}) error {
v, ok := i.(uint64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v == 0 {
return fmt.Errorf("reward distribution window must be positive: %d", v)
}
return nil
}
func validateSlashFraction(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("slash fraction must be positive: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("slash fraction is too large: %s", v)
}
return nil
}
func validateSlashWindow(i interface{}) error {
v, ok := i.(uint64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v == 0 {
return fmt.Errorf("slash window must be positive: %d", v)
}
return nil
}
func validateMinValidPerWindow(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 valid per window must be positive: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("min valid per window is too large: %s", v)
}
return nil
}