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handler.go
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handler.go
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package staking
import (
"fmt"
sdk "github.com/furyaxyz/fuxchain/libs/cosmos-sdk/types"
tmtypes "github.com/furyaxyz/fuxchain/libs/tendermint/types"
"github.com/furyaxyz/fuxchain/x/staking/keeper"
"github.com/furyaxyz/fuxchain/x/staking/types"
)
// NewHandler manages all tx treatment
func NewHandler(k keeper.Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
ctx.SetEventManager(sdk.NewEventManager())
errMsg := fmt.Sprintf("unrecognized staking message type: %T", msg)
if !k.CheckEnabled(ctx) {
return nil, types.ErrCodeDisabledOperate()
}
if !k.ParamsEnableDposOp(ctx) && ctx.BlockHeight() != 0 {
switch msg.(type) {
case types.MsgCreateValidator, types.MsgEditValidatorCommissionRate,
types.MsgDeposit, types.MsgAddShares, types.MsgDepositMinSelfDelegation:
return nil, types.ErrDisableOperation
}
}
switch msg := msg.(type) {
case types.MsgCreateValidator:
return handleMsgCreateValidator(ctx, msg, k)
case types.MsgEditValidator:
return handleMsgEditValidator(ctx, msg, k)
case types.MsgEditValidatorCommissionRate:
return handleMsgEditValidatorCommissionRate(ctx, msg, k)
case types.MsgDeposit:
return handleMsgDeposit(ctx, msg, k)
case types.MsgWithdraw:
return handleMsgWithdraw(ctx, msg, k)
case types.MsgAddShares:
return handleMsgAddShares(ctx, msg, k)
case types.MsgDestroyValidator:
return handleMsgDestroyValidator(ctx, msg, k)
case types.MsgDepositMinSelfDelegation:
return handleMsgDepositMinSelfDelegation(ctx, msg, k)
default:
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
// StringInSlice returns true if a is found the list.
func StringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
// These functions assumes everything has been authenticated, now we just perform action and save
func handleMsgCreateValidator(ctx sdk.Context, msg types.MsgCreateValidator, k keeper.Keeper) (*sdk.Result, error) {
if _, found := k.GetValidator(ctx, msg.ValidatorAddress); found {
return nil, ErrValidatorOwnerExists()
}
if _, found := k.GetValidatorByConsAddr(ctx, sdk.GetConsAddress(msg.PubKey)); found {
return nil, ErrValidatorPubKeyExists()
}
if msg.MinSelfDelegation.Denom != k.BondDenom(ctx) {
return nil, ErrBadDenom()
}
if _, err := msg.Description.EnsureLength(); err != nil {
return nil, err
}
if ctx.ConsensusParams() != nil {
tmPubKey := tmtypes.TM2PB.PubKey(msg.PubKey)
if !StringInSlice(tmPubKey.Type, ctx.ConsensusParams().Validator.PubKeyTypes) {
return nil, ErrValidatorPubKeyTypeNotSupported(tmPubKey.Type,
ctx.ConsensusParams().Validator.PubKeyTypes)
}
}
minSelfDelegation := k.ParamsMinSelfDelegation(ctx)
validator := NewValidator(msg.ValidatorAddress, msg.PubKey, msg.Description, minSelfDelegation)
commission := NewCommission(sdk.NewDec(1), sdk.NewDec(1), sdk.NewDec(0))
validator, err := validator.SetInitialCommission(commission)
if err != nil {
return nil, err
}
k.SetValidator(ctx, validator)
k.SetValidatorByConsAddr(ctx, validator)
k.SetNewValidatorByPowerIndex(ctx, validator)
// add shares of equal value of msd for validator itself
defaultMinSelfDelegationToken := sdk.NewDecCoinFromDec(k.BondDenom(ctx), validator.MinSelfDelegation)
if err = k.AddSharesAsMinSelfDelegation(ctx, msg.DelegatorAddress, &validator, defaultMinSelfDelegationToken); err != nil {
return nil, err
}
k.AfterValidatorCreated(ctx, validator.OperatorAddress)
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(types.EventTypeCreateValidator,
sdk.NewAttribute(types.AttributeKeyValidator, msg.ValidatorAddress.String()),
sdk.NewAttribute(sdk.AttributeKeyAmount, validator.MinSelfDelegation.String())),
sdk.NewEvent(sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.DelegatorAddress.String())),
})
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgEditValidator(ctx sdk.Context, msg types.MsgEditValidator, k keeper.Keeper) (*sdk.Result, error) {
// validator must already be registered
validator, found := k.GetValidator(ctx, msg.ValidatorAddress)
if !found {
return nil, ErrNoValidatorFound(msg.ValidatorAddress.String())
}
// replace all editable fields (clients should autofill existing values)
description, err := validator.Description.UpdateDescription(msg.Description)
if err != nil {
return nil, err
}
validator.Description = description
k.SetValidator(ctx, validator)
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(types.EventTypeEditValidator,
sdk.NewAttribute(types.AttributeKeyMinSelfDelegation, validator.MinSelfDelegation.String()),
),
sdk.NewEvent(sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.ValidatorAddress.String()),
),
})
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgDepositMinSelfDelegation(ctx sdk.Context, msg types.MsgDepositMinSelfDelegation, k keeper.Keeper) (*sdk.Result, error) {
validator, found := k.GetValidator(ctx, msg.ValidatorAddress)
if !found {
return nil, ErrNoValidatorFound(msg.ValidatorAddress.String())
}
minSelfDelegation := k.ParamsMinSelfDelegation(ctx)
if validator.MinSelfDelegation.GTE(minSelfDelegation) {
return nil, types.ErrMinSelfDelegationEnough
}
depositAmount := minSelfDelegation.Sub(validator.MinSelfDelegation)
depositCoin := sdk.NewDecCoinFromDec(k.BondDenom(ctx), depositAmount)
if err := k.DepositMinSelfDelegation(ctx, sdk.AccAddress(validator.OperatorAddress),
&validator, depositCoin); err != nil {
return nil, err
}
validator.MinSelfDelegation = minSelfDelegation
k.SetValidator(ctx, validator)
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(types.EventTypeDepositMinSelfDelegation,
sdk.NewAttribute(types.AttributeKeyMinSelfDelegation, validator.MinSelfDelegation.String()),
),
sdk.NewEvent(sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeyAmount, depositAmount.String()),
),
})
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}