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handler.go
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/
handler.go
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package stake
import (
"bytes"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/tendermint/tendermint/libs/common"
tmtypes "github.com/tendermint/tendermint/types"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/stake/keeper"
"github.com/cosmos/cosmos-sdk/x/stake/tags"
"github.com/cosmos/cosmos-sdk/x/stake/types"
)
func NewHandler(k keeper.Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) sdk.Result {
// NOTE msg already has validate basic run
switch msg := msg.(type) {
case types.MsgCreateValidator:
return handleMsgCreateValidator(ctx, msg, k)
case types.MsgEditValidator:
return handleMsgEditValidator(ctx, msg, k)
case types.MsgDelegate:
return handleMsgDelegate(ctx, msg, k)
case types.MsgBeginRedelegate:
return handleMsgBeginRedelegate(ctx, msg, k)
case types.MsgBeginUnbonding:
return handleMsgBeginUnbonding(ctx, msg, k)
default:
return sdk.ErrTxDecode("invalid message parse in staking module").Result()
}
}
}
// Called every block, update validator set
func EndBlocker(ctx sdk.Context, k keeper.Keeper) (validatorUpdates []abci.ValidatorUpdate, endBlockerTags sdk.Tags) {
// Reset the intra-transaction counter.
k.SetIntraTxCounter(ctx, 0)
// Calculate validator set changes.
//
// NOTE: ApplyAndReturnValidatorSetUpdates has to come before
// UnbondAllMatureValidatorQueue.
// This fixes a bug when the unbonding period is instant (is the case in
// some of the tests). The test expected the validator to be completely
// unbonded after the Endblocker (go from Bonded -> Unbonding during
// ApplyAndReturnValidatorSetUpdates and then Unbonding -> Unbonded during
// UnbondAllMatureValidatorQueue).
validatorUpdates = k.ApplyAndReturnValidatorSetUpdates(ctx)
// Unbond all mature validators from the unbonding queue.
k.UnbondAllMatureValidatorQueue(ctx)
// Remove all mature unbonding delegations from the ubd queue.
matureUnbonds := k.DequeueAllMatureUnbondingQueue(ctx, ctx.BlockHeader().Time)
for _, dvPair := range matureUnbonds {
err := k.CompleteUnbonding(ctx, dvPair.DelegatorAddr, dvPair.ValidatorAddr)
if err != nil {
continue
}
endBlockerTags.AppendTags(sdk.NewTags(
tags.Action, ActionCompleteUnbonding,
tags.Delegator, []byte(dvPair.DelegatorAddr.String()),
tags.SrcValidator, []byte(dvPair.ValidatorAddr.String()),
))
}
// Remove all mature redelegations from the red queue.
matureRedelegations := k.DequeueAllMatureRedelegationQueue(ctx, ctx.BlockHeader().Time)
for _, dvvTriplet := range matureRedelegations {
err := k.CompleteRedelegation(ctx, dvvTriplet.DelegatorAddr, dvvTriplet.ValidatorSrcAddr, dvvTriplet.ValidatorDstAddr)
if err != nil {
continue
}
endBlockerTags.AppendTags(sdk.NewTags(
tags.Action, tags.ActionCompleteRedelegation,
tags.Delegator, []byte(dvvTriplet.DelegatorAddr.String()),
tags.SrcValidator, []byte(dvvTriplet.ValidatorSrcAddr.String()),
tags.DstValidator, []byte(dvvTriplet.ValidatorDstAddr.String()),
))
}
return
}
//_____________________________________________________________________
// These functions assume everything has been authenticated,
// now we just perform action and save
func handleMsgCreateValidator(ctx sdk.Context, msg types.MsgCreateValidator, k keeper.Keeper) sdk.Result {
// check to see if the pubkey or sender has been registered before
_, found := k.GetValidator(ctx, msg.ValidatorAddr)
if found {
return ErrValidatorOwnerExists(k.Codespace()).Result()
}
_, found = k.GetValidatorByConsAddr(ctx, sdk.GetConsAddress(msg.PubKey))
if found {
return ErrValidatorPubKeyExists(k.Codespace()).Result()
}
if msg.Delegation.Denom != k.GetParams(ctx).BondDenom {
return ErrBadDenom(k.Codespace()).Result()
}
if ctx.ConsensusParams() != nil {
tmPubKey := tmtypes.TM2PB.PubKey(msg.PubKey)
if !common.StringInSlice(tmPubKey.Type, ctx.ConsensusParams().Validator.PubKeyTypes) {
return ErrValidatorPubKeyTypeUnsupported(k.Codespace(), tmPubKey.Type, ctx.ConsensusParams().Validator.PubKeyTypes).Result()
}
}
validator := NewValidator(msg.ValidatorAddr, msg.PubKey, msg.Description)
commission := NewCommissionWithTime(
msg.Commission.Rate, msg.Commission.MaxRate,
msg.Commission.MaxChangeRate, ctx.BlockHeader().Time,
)
validator, err := validator.SetInitialCommission(commission)
if err != nil {
return err.Result()
}
k.SetValidator(ctx, validator)
k.SetValidatorByConsAddr(ctx, validator)
k.SetNewValidatorByPowerIndex(ctx, validator)
k.OnValidatorCreated(ctx, validator.OperatorAddr)
// move coins from the msg.Address account to a (self-delegation) delegator account
// the validator account and global shares are updated within here
_, err = k.Delegate(ctx, msg.DelegatorAddr, msg.Delegation, validator, true)
if err != nil {
return err.Result()
}
tags := sdk.NewTags(
tags.DstValidator, []byte(msg.ValidatorAddr.String()),
tags.Moniker, []byte(msg.Description.Moniker),
tags.Identity, []byte(msg.Description.Identity),
)
return sdk.Result{
Tags: tags,
}
}
func handleMsgEditValidator(ctx sdk.Context, msg types.MsgEditValidator, k keeper.Keeper) sdk.Result {
// validator must already be registered
validator, found := k.GetValidator(ctx, msg.ValidatorAddr)
if !found {
return ErrNoValidatorFound(k.Codespace()).Result()
}
// replace all editable fields (clients should autofill existing values)
description, err := validator.Description.UpdateDescription(msg.Description)
if err != nil {
return err.Result()
}
validator.Description = description
if msg.CommissionRate != nil {
commission, err := k.UpdateValidatorCommission(ctx, validator, *msg.CommissionRate)
if err != nil {
return err.Result()
}
validator.Commission = commission
k.OnValidatorModified(ctx, msg.ValidatorAddr)
}
k.SetValidator(ctx, validator)
tags := sdk.NewTags(
tags.DstValidator, []byte(msg.ValidatorAddr.String()),
tags.Moniker, []byte(description.Moniker),
tags.Identity, []byte(description.Identity),
)
return sdk.Result{
Tags: tags,
}
}
func handleMsgDelegate(ctx sdk.Context, msg types.MsgDelegate, k keeper.Keeper) sdk.Result {
validator, found := k.GetValidator(ctx, msg.ValidatorAddr)
if !found {
return ErrNoValidatorFound(k.Codespace()).Result()
}
if msg.Delegation.Denom != k.GetParams(ctx).BondDenom {
return ErrBadDenom(k.Codespace()).Result()
}
if validator.Jailed && !bytes.Equal(validator.OperatorAddr, msg.DelegatorAddr) {
return ErrValidatorJailed(k.Codespace()).Result()
}
_, err := k.Delegate(ctx, msg.DelegatorAddr, msg.Delegation, validator, true)
if err != nil {
return err.Result()
}
tags := sdk.NewTags(
tags.Delegator, []byte(msg.DelegatorAddr.String()),
tags.DstValidator, []byte(msg.ValidatorAddr.String()),
)
return sdk.Result{
Tags: tags,
}
}
func handleMsgBeginUnbonding(ctx sdk.Context, msg types.MsgBeginUnbonding, k keeper.Keeper) sdk.Result {
ubd, err := k.BeginUnbonding(ctx, msg.DelegatorAddr, msg.ValidatorAddr, msg.SharesAmount)
if err != nil {
return err.Result()
}
finishTime := types.MsgCdc.MustMarshalBinaryLengthPrefixed(ubd.MinTime)
tags := sdk.NewTags(
tags.Delegator, []byte(msg.DelegatorAddr.String()),
tags.SrcValidator, []byte(msg.ValidatorAddr.String()),
tags.EndTime, finishTime,
)
return sdk.Result{Data: finishTime, Tags: tags}
}
func handleMsgBeginRedelegate(ctx sdk.Context, msg types.MsgBeginRedelegate, k keeper.Keeper) sdk.Result {
red, err := k.BeginRedelegation(ctx, msg.DelegatorAddr, msg.ValidatorSrcAddr,
msg.ValidatorDstAddr, msg.SharesAmount)
if err != nil {
return err.Result()
}
finishTime := types.MsgCdc.MustMarshalBinaryLengthPrefixed(red.MinTime)
tags := sdk.NewTags(
tags.Delegator, []byte(msg.DelegatorAddr.String()),
tags.SrcValidator, []byte(msg.ValidatorSrcAddr.String()),
tags.DstValidator, []byte(msg.ValidatorDstAddr.String()),
tags.EndTime, finishTime,
)
return sdk.Result{Data: finishTime, Tags: tags}
}