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stake.go
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stake.go
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package keeper
import (
"fmt"
"strings"
"time"
sdkerrors "cosmossdk.io/errors"
"cosmossdk.io/math"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
"github.com/celinium-network/restaking_protocol/x/multitokenstaking/types"
)
func (k Keeper) MTStakingDelegate(
ctx sdk.Context, delegatorAccAddr sdk.AccAddress, validatorAddr sdk.ValAddress, balance sdk.Coin,
) (newShares math.Int, err error) {
defaultBondDenom := k.stakingKeeper.BondDenom(ctx)
if strings.Compare(balance.Denom, defaultBondDenom) == 0 {
return newShares, sdkerrors.Wrapf(types.ErrForbidStakingDenom, "denom: %s is native token", balance.Denom)
}
if !k.denomInWhiteList(ctx, balance.Denom) {
return newShares, sdkerrors.Wrapf(types.ErrForbidStakingDenom, "denom: %s not in white list", balance.Denom)
}
agent := k.GetOrCreateMTStakingAgent(ctx, balance.Denom, validatorAddr)
agentAccAddr := sdk.MustAccAddressFromBech32(agent.AgentAddress)
if err := k.depositAndDelegate(ctx, delegatorAccAddr, agentAccAddr, validatorAddr, balance); err != nil {
return newShares, err
}
newShares = agent.CalculateShareFromCoin(balance.Amount)
agent.Shares = agent.Shares.Add(newShares)
agent.StakedAmount = agent.StakedAmount.Add(balance.Amount)
k.SetMTStakingAgent(ctx, agentAccAddr, agent)
k.SetMTStakingDenomAndValWithAgentAddress(ctx, agentAccAddr, agent.StakeDenom, validatorAddr)
err = k.IncreaseDelegatorAgentShares(ctx, newShares, agentAccAddr, delegatorAccAddr)
if err != nil {
return newShares, err
}
return newShares, nil
}
// depositAndDelegate defines a method deposit coin for delegator to agent and mint shares to delegator.
func (k Keeper) depositAndDelegate(ctx sdk.Context, delegator, agentAccAddr sdk.AccAddress, validatorAddr sdk.ValAddress, balance sdk.Coin) error {
validator, err := k.getValidator(ctx, validatorAddr)
if err != nil {
return err
}
if err := k.sendCoinsFromAccountToAccount(ctx, delegator, agentAccAddr, sdk.Coins{balance}); err != nil {
return err
}
eqNativeCoin, err := k.CalculateEquivalentNativeCoin(ctx, balance)
if err != nil {
return err
}
// mint equivalent coin to agent account then agent delegate to validator.
return k.mintAndDelegate(ctx, agentAccAddr, validator, eqNativeCoin)
}
// depositAndDelegate defines a method mint coin to agent account and delegate to a validator.
func (k Keeper) mintAndDelegate(ctx sdk.Context, agentAccAddr sdk.AccAddress, validator *stakingtypes.Validator, balance sdk.Coin) error {
if err := k.bankKeeper.MintCoins(ctx, types.ModuleName, sdk.Coins{balance}); err != nil {
return err
}
if err := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, agentAccAddr, sdk.Coins{balance}); err != nil {
return err
}
if _, err := k.stakingKeeper.Delegate(ctx, agentAccAddr, balance.Amount, stakingtypes.Unbonded, *validator, true); err != nil {
return err
}
return nil
}
// MTStakingUndelegate defines a method for performing an undelegation from a delegate and a validator.
// Delegator burn the shares of the agents. Then agent account begin undelegate.
func (k Keeper) MTStakingUndelegate(
ctx sdk.Context, delegatorAccAddr sdk.AccAddress, valAddr sdk.ValAddress, balance sdk.Coin,
) (completeTime time.Time, err error) {
agent, found := k.GetMTStakingAgent(ctx, balance.Denom, valAddr)
if !found {
return completeTime, types.ErrNotExistedAgent
}
if err := k.Unbond(ctx, delegatorAccAddr, valAddr, balance); err != nil {
return completeTime, err
}
agentAccAddr := sdk.MustAccAddressFromBech32(agent.AgentAddress)
unbonding := k.GetOrCreateMTStakingUnbonding(ctx, agentAccAddr, delegatorAccAddr)
unbondingTime := k.stakingKeeper.GetParams(ctx).UnbondingTime
// TODO Whether the length of the entries should be limited ?
completeTime = ctx.BlockTime().Add(unbondingTime)
unbonding.Entries = append(unbonding.Entries, types.MTStakingUnbondingDelegationEntry{
CreatedHeight: ctx.BlockHeight(),
CompletionTime: completeTime,
InitialBalance: balance,
Balance: balance,
})
k.SetMTStakingUnbondingDelegation(ctx, unbonding)
k.InsertUBDQueue(ctx, unbonding, completeTime)
return completeTime, nil
}
// Unbond defines a method for removing shares from an agent by a delegator then agent undelegate funds from a validator.
func (k Keeper) Unbond(ctx sdk.Context, delegatorAccAddr sdk.AccAddress, valAddr sdk.ValAddress, balance sdk.Coin) error {
var removeShares math.Int
agent, found := k.GetMTStakingAgent(ctx, balance.Denom, valAddr)
if !found {
return types.ErrNotExistedAgent
}
agentAccAddr := sdk.MustAccAddressFromBech32(agent.AgentAddress)
// delegator withdraw all staking reward by owner shares
k.distributeDelegatorReward(ctx, delegatorAccAddr, agentAccAddr, valAddr, agent)
eqNativeBalance, err := k.CalculateEquivalentNativeCoin(ctx, balance)
if err != nil {
return err
}
if err := k.undelegateAndBurn(ctx, agentAccAddr, valAddr, eqNativeBalance); err != nil {
return err
}
removeShares = agent.CalculateShareFromCoin(balance.Amount)
if err := k.DecreaseDelegatorAgentShares(ctx, removeShares, agentAccAddr, delegatorAccAddr); err != nil {
return err
}
agent.Shares = agent.Shares.Sub(removeShares)
agent.StakedAmount = agent.StakedAmount.Sub(balance.Amount)
k.SetMTStakingAgent(ctx, agentAccAddr, agent)
return nil
}
// undelegateAndBurn performs immediate undelegation from the staking module and burns the undelegated funds.
func (k Keeper) undelegateAndBurn(ctx sdk.Context, agentAccAddr sdk.AccAddress, valAddr sdk.ValAddress, balance sdk.Coin) error {
stakedShares, err := k.stakingKeeper.ValidateUnbondAmount(ctx, agentAccAddr, valAddr, balance.Amount)
if err != nil {
return err
}
undelegationCoins, err := k.instantUndelegate(ctx, agentAccAddr, valAddr, stakedShares)
if err != nil {
return err
}
if err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, agentAccAddr, types.ModuleName, undelegationCoins); err != nil {
return err
}
if err := k.bankKeeper.BurnCoins(ctx, types.ModuleName, undelegationCoins); err != nil {
return err
}
return nil
}
func (k Keeper) getValidator(ctx sdk.Context, valAddr sdk.ValAddress) (*stakingtypes.Validator, error) {
validator, found := k.stakingKeeper.GetValidator(ctx, valAddr)
if !found {
return nil, sdkerrors.Wrapf(stakingtypes.ErrNoValidatorFound, "address %s", valAddr)
}
return &validator, nil
}
func (k Keeper) denomInWhiteList(ctx sdk.Context, denom string) bool {
whiteList, found := k.GetMTStakingDenomWhiteList(ctx)
if !found {
return false
}
for _, wd := range whiteList.DenomList {
if wd == denom {
return true
}
}
return false
}
func (k Keeper) GetOrCreateMTStakingAgent(ctx sdk.Context, denom string, validatorAddr sdk.ValAddress) *types.MTStakingAgent {
agent, found := k.GetMTStakingAgent(ctx, denom, validatorAddr)
if found {
return agent
}
valAddr := validatorAddr.String()
newAccount := k.GenerateAccount(ctx, denom, valAddr)
agent = &types.MTStakingAgent{
AgentAddress: newAccount.Address,
StakeDenom: denom,
ValidatorAddress: valAddr,
RewardAddress: newAccount.Address,
StakedAmount: math.ZeroInt(),
Shares: math.ZeroInt(),
RewardAmount: math.ZeroInt(),
CreatedBlockHeight: ctx.BlockHeight(),
}
return agent
}
func (k Keeper) GenerateAccount(ctx sdk.Context, prefix, suffix string) *authtypes.ModuleAccount {
header := ctx.BlockHeader()
buf := []byte(types.ModuleName + prefix)
buf = append(buf, header.AppHash...)
buf = append(buf, header.DataHash...)
addrBuf := string(buf) + suffix
return authtypes.NewEmptyModuleAccount(addrBuf, authtypes.Staking)
}
// instantUndelegate define a method for immediately undelegate from staking module
func (k Keeper) instantUndelegate(ctx sdk.Context, delegatorAccAddr sdk.AccAddress, validatorAddr sdk.ValAddress, sharesAmount sdk.Dec) (sdk.Coins, error) {
validator, found := k.stakingKeeper.GetValidator(ctx, validatorAddr)
if !found {
return nil, stakingtypes.ErrNoValidatorFound
}
unbondAmount, err := k.stakingKeeper.Unbond(ctx, delegatorAccAddr, validatorAddr, sharesAmount)
if err != nil {
return nil, err
}
bondDenom := k.stakingKeeper.BondDenom(ctx)
unbondCoin := sdk.NewCoin(bondDenom, unbondAmount)
unbondCoins := sdk.NewCoins(unbondCoin)
moduleName := stakingtypes.NotBondedPoolName
if validator.IsBonded() {
moduleName = stakingtypes.BondedPoolName
}
err = k.bankKeeper.UndelegateCoinsFromModuleToAccount(ctx, moduleName, delegatorAccAddr, unbondCoins)
if err != nil {
return nil, err
}
return unbondCoins, nil
}
// UpdateEquivalentNativeCoinMultiplier defines a method for updating the equivalent
// native coin multiplier for all token in white list
func (k Keeper) UpdateEquivalentNativeCoinMultiplier(ctx sdk.Context, epoch int64) {
store := ctx.KVStore(k.storeKey)
prefixStore := prefix.NewStore(store, types.DenomWhiteListKey)
iterator := sdk.KVStorePrefixIterator(prefixStore, nil)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
denom := iterator.Value()
multiplier, err := k.EquivalentNativeCoinMultiplier(ctx, string(denom))
if err != nil {
ctx.Logger().Error(fmt.Sprintf("get equivalent native coin multiplier of %s failed", denom))
continue
}
k.SetEquivalentNativeCoinMultiplier(ctx, epoch, string(denom), multiplier)
}
}
// RefreshAllAgentDelegation defines a method for updating all agent delegation amount base on current multiplier.
func (k Keeper) RefreshAllAgentDelegation(ctx sdk.Context) {
agents := k.GetAllAgent(ctx)
for i := 0; i < len(agents); i++ {
err := k.RefreshAgentDelegation(ctx, &agents[i])
if err != nil {
ctx.Logger().Error(fmt.Sprintf("refreshAgentDelegation failed, agentAddress %s", err))
}
}
}
func (k Keeper) RefreshAgentDelegation(ctx sdk.Context, agent *types.MTStakingAgent) error {
valAddress, err := sdk.ValAddressFromBech32(agent.ValidatorAddress)
if err != nil {
return err
}
validator, found := k.stakingKeeper.GetValidator(ctx, valAddress)
if !found {
return stakingtypes.ErrNoValidatorFound
}
var currentAmount math.Int
agentAccAddr := sdk.MustAccAddressFromBech32(agent.AgentAddress)
agentDelegation, found := k.stakingKeeper.GetDelegation(ctx, agentAccAddr, valAddress)
if !found {
return stakingtypes.ErrNoDelegation
} else {
currentAmount = validator.TokensFromShares(agentDelegation.Shares).RoundInt()
}
refreshedAmount, err := k.CalculateEquivalentNativeCoin(ctx, sdk.NewCoin(agent.StakeDenom, agent.StakedAmount))
if err != nil {
return err
}
if refreshedAmount.Amount.GT(currentAmount) {
adjustment := refreshedAmount.Amount.Sub(currentAmount)
err = k.mintAndDelegate(ctx, agentAccAddr, &validator, sdk.NewCoin(refreshedAmount.Denom, adjustment))
} else if refreshedAmount.Amount.LT(currentAmount) {
adjustment := currentAmount.Sub(refreshedAmount.Amount)
err = k.undelegateAndBurn(ctx, agentAccAddr, valAddress, sdk.NewCoin(refreshedAmount.Denom, adjustment))
}
return err
}
// CollectAgentsReward defines a method for withdraw staking reward for all agents.
// TODO let user call it.
func (k Keeper) CollectAgentsReward(ctx sdk.Context) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.AgentPrefix)
defer iterator.Close()
nativeCoinDenom := k.stakingKeeper.BondDenom(ctx)
for ; iterator.Valid(); iterator.Next() {
var agent types.MTStakingAgent
// TODO panic or continue ?
err := k.cdc.Unmarshal(iterator.Value(), &agent)
if err != nil {
ctx.Logger().Error(err.Error())
continue
}
delegator := sdk.MustAccAddressFromBech32(agent.AgentAddress)
valAddr, err := sdk.ValAddressFromBech32(agent.ValidatorAddress)
if err != nil {
ctx.Logger().Error(fmt.Sprintf("convert validator address from bech32:%s failed, err: %s", agent.ValidatorAddress, err))
continue
}
rewards, err := k.distributionKeeper.WithdrawDelegationRewards(ctx, delegator, valAddr)
if err != nil {
ctx.Logger().Error(fmt.Sprintf("Withdraw delegation reward failed. AgentID: %s", agent.AgentAddress))
continue
}
agent.RewardAmount = agent.RewardAmount.Add(rewards.AmountOf(nativeCoinDenom))
agentBz, err := k.cdc.Marshal(&agent)
if err != nil {
ctx.Logger().Error(err.Error())
continue
}
store.Set(iterator.Key(), agentBz)
}
}