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params.go
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params.go
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package slashing
import (
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/params"
)
// Default parameter namespace
const (
DefaultParamspace = "slashing"
)
// Parameter store key
var (
KeyMaxEvidenceAge = []byte("MaxEvidenceAge")
KeySignedBlocksWindow = []byte("SignedBlocksWindow")
KeyMinSignedPerWindow = []byte("MinSignedPerWindow")
KeyDoubleSignUnbondDuration = []byte("DoubleSignUnbondDuration")
KeyDowntimeUnbondDuration = []byte("DowntimeUnbondDuration")
KeySlashFractionDoubleSign = []byte("SlashFractionDoubleSign")
KeySlashFractionDowntime = []byte("SlashFractionDowntime")
)
// ParamTypeTable for slashing module
func ParamTypeTable() params.TypeTable {
return params.NewTypeTable().RegisterParamSet(&Params{})
}
// Params - used for initializing default parameter for slashing at genesis
type Params struct {
MaxEvidenceAge time.Duration `json:"max-evidence-age"`
SignedBlocksWindow int64 `json:"signed-blocks-window"`
MinSignedPerWindow sdk.Dec `json:"min-signed-per-window"`
DoubleSignUnbondDuration time.Duration `json:"double-sign-unbond-duration"`
DowntimeUnbondDuration time.Duration `json:"downtime-unbond-duration"`
SlashFractionDoubleSign sdk.Dec `json:"slash-fraction-double-sign"`
SlashFractionDowntime sdk.Dec `json:"slash-fraction-downtime"`
}
// Implements params.ParamStruct
func (p *Params) KeyValuePairs() params.KeyValuePairs {
return params.KeyValuePairs{
{KeyMaxEvidenceAge, &p.MaxEvidenceAge},
{KeySignedBlocksWindow, &p.SignedBlocksWindow},
{KeyMinSignedPerWindow, &p.MinSignedPerWindow},
{KeyDoubleSignUnbondDuration, &p.DoubleSignUnbondDuration},
{KeyDowntimeUnbondDuration, &p.DowntimeUnbondDuration},
{KeySlashFractionDoubleSign, &p.SlashFractionDoubleSign},
{KeySlashFractionDowntime, &p.SlashFractionDowntime},
}
}
// Default parameters used by Cosmos Hub
func DefaultParams() Params {
return Params{
// defaultMaxEvidenceAge = 60 * 60 * 24 * 7 * 3
// TODO Temporarily set to 2 minutes for testnets.
MaxEvidenceAge: 60 * 2 * time.Second,
// TODO Temporarily set to five minutes for testnets
DoubleSignUnbondDuration: 60 * 5 * time.Second,
// TODO Temporarily set to 100 blocks for testnets
SignedBlocksWindow: 100,
// TODO Temporarily set to 10 minutes for testnets
DowntimeUnbondDuration: 60 * 10 * time.Second,
MinSignedPerWindow: sdk.NewDecWithPrec(5, 1),
SlashFractionDoubleSign: sdk.OneDec().Quo(sdk.NewDecWithoutFra(20)),
SlashFractionDowntime: sdk.OneDec().Quo(sdk.NewDecWithoutFra(100)),
}
}
// MaxEvidenceAge - Max age for evidence - 21 days (3 weeks)
// MaxEvidenceAge = 60 * 60 * 24 * 7 * 3
func (k Keeper) MaxEvidenceAge(ctx sdk.Context) (res time.Duration) {
k.paramspace.Get(ctx, KeyMaxEvidenceAge, &res)
return
}
// SignedBlocksWindow - sliding window for downtime slashing
func (k Keeper) SignedBlocksWindow(ctx sdk.Context) (res int64) {
k.paramspace.Get(ctx, KeySignedBlocksWindow, &res)
return
}
// Downtime slashing thershold - default 50% of the SignedBlocksWindow
func (k Keeper) MinSignedPerWindow(ctx sdk.Context) int64 {
var minSignedPerWindow sdk.Dec
k.paramspace.Get(ctx, KeyMinSignedPerWindow, &minSignedPerWindow)
signedBlocksWindow := k.SignedBlocksWindow(ctx)
return sdk.NewDec(signedBlocksWindow).Mul(minSignedPerWindow).RawInt()
}
// Double-sign unbond duration
func (k Keeper) DoubleSignUnbondDuration(ctx sdk.Context) (res time.Duration) {
k.paramspace.Get(ctx, KeyDoubleSignUnbondDuration, &res)
return
}
// Downtime unbond duration
func (k Keeper) DowntimeUnbondDuration(ctx sdk.Context) (res time.Duration) {
k.paramspace.Get(ctx, KeyDowntimeUnbondDuration, &res)
return
}
// SlashFractionDoubleSign - currently default 5%
func (k Keeper) SlashFractionDoubleSign(ctx sdk.Context) (res sdk.Dec) {
k.paramspace.Get(ctx, KeySlashFractionDoubleSign, &res)
return
}
// SlashFractionDowntime - currently default 1%
func (k Keeper) SlashFractionDowntime(ctx sdk.Context) (res sdk.Dec) {
k.paramspace.Get(ctx, KeySlashFractionDowntime, &res)
return
}