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min_self_delegation.go
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min_self_delegation.go
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package keeper
import (
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/zenchainprotocol/zenchain-node/x/staking/types"
)
// WithdrawMinSelfDelegation withdraws the msd from validator
func (k Keeper) WithdrawMinSelfDelegation(ctx sdk.Context, delAddr sdk.AccAddress, validator types.Validator,
) (completionTime time.Time, err error) {
// 0.check the msd on validator
if validator.MinSelfDelegation.IsZero() {
return completionTime, types.ErrNoMinSelfDelegation(validator.OperatorAddress.String())
}
// 1.check the remained shares on the validator
remainShares := validator.GetDelegatorShares().Sub(k.getSharesFromDefaultMinSelfDelegation())
if remainShares.LT(sdk.ZeroDec()) {
return completionTime, types.ErrMoreMinSelfDelegation(validator.OperatorAddress.String())
}
// 2.unbond msd
k.bondedTokensToNotBonded(ctx, sdk.NewDecCoinFromDec(sdk.DefaultBondDenom, validator.MinSelfDelegation))
completionTime = ctx.BlockHeader().Time.Add(k.UnbondingTime(ctx))
minSelfUndelegation := types.NewUndelegationInfo(delAddr, validator.MinSelfDelegation, completionTime)
k.SetUndelegating(ctx, minSelfUndelegation)
k.SetAddrByTimeKeyWithNilValue(ctx, minSelfUndelegation.CompletionTime, minSelfUndelegation.DelegatorAddress)
// 3.clear the msd
validator.MinSelfDelegation = sdk.ZeroDec()
// 4.jail the validator
validator.Jailed = true
// 5.call the hooks of slashing module
k.AfterValidatorDestroyed(ctx, validator.ConsAddress(), validator.OperatorAddress)
// 6.change status of validator
switch validator.Status {
case sdk.Bonded:
// set the validator info to enforce the update of validator-set
k.AppendAbandonedValidatorAddrs(ctx, validator.ConsAddress())
case sdk.Unbonding:
case sdk.Unbonded:
// if there is no shares on the validator, remove it
if remainShares.IsZero() && validator.GetMinSelfDelegation().IsZero() {
k.RemoveValidator(ctx, validator.OperatorAddress)
return
}
}
// kick out the val from the vals-set
k.DeleteValidatorByPowerIndex(ctx, validator)
// ATTENTION:update DelegatorShares must go after DeleteValidatorByPowerIndex
validator.DelegatorShares = remainShares
k.SetValidator(ctx, validator)
return
}
// AddSharesAsMinSelfDelegation adds shares of equal value of default msd (0.001okt) to validator itself during the creation
func (k Keeper) AddSharesAsMinSelfDelegation(ctx sdk.Context, delAddr sdk.AccAddress, validator *types.Validator,
defaultMSDToken sdk.SysCoin) (err error) {
// 0. transfer account's okt (0.001okt as default) into bondPool
coins := sdk.SysCoins{defaultMSDToken}
err = k.supplyKeeper.DelegateCoinsFromAccountToModule(ctx, delAddr, types.BondedPoolName, coins)
if err != nil {
return err
}
// 1. add shares for default msd to validator itself
k.addSharesAsDefaultMinSelfDelegation(ctx, validator)
return nil
}
func (k Keeper) addSharesAsDefaultMinSelfDelegation(ctx sdk.Context, pValidator *types.Validator) {
k.DeleteValidatorByPowerIndex(ctx, *pValidator)
//TODO: current rule: any msd -> 1 shares
shares := k.getSharesFromDefaultMinSelfDelegation()
pValidator.DelegatorShares = pValidator.GetDelegatorShares().Add(shares)
k.SetValidator(ctx, *pValidator)
k.SetValidatorByPowerIndex(ctx, *pValidator)
}
// RULES: any msd -> 1 shares
func (k Keeper) getSharesFromDefaultMinSelfDelegation() sdk.Dec {
return sdk.OneDec()
}