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handler.go
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handler.go
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package stake
import (
"bytes"
"encoding/json"
"fmt"
"github.com/cosmos/cosmos-sdk/baseapp"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/gov"
"github.com/cosmos/cosmos-sdk/x/stake/keeper"
"github.com/cosmos/cosmos-sdk/x/stake/tags"
"github.com/cosmos/cosmos-sdk/x/stake/types"
"github.com/tendermint/tendermint/crypto/ed25519"
)
func NewHandler(k keeper.Keeper, govKeeper gov.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.MsgCreateValidatorProposal:
if sdk.IsUpgrade(sdk.BEP159) {
return sdk.ErrMsgNotSupported("MsgCreateValidatorProposal disabled in BEP-159").Result()
}
return handleMsgCreateValidatorAfterProposal(ctx, msg, k, govKeeper)
case types.MsgRemoveValidator:
return handleMsgRemoveValidatorAfterProposal(ctx, msg, k, govKeeper)
// Beacon Chain New Staking in BEP-159
case types.MsgCreateValidatorOpen:
if !sdk.IsUpgrade(sdk.BEP159Phase2) {
return sdk.ErrMsgNotSupported("BEP-159 Phase 2 not activated yet").Result()
}
return handleMsgCreateValidatorOpen(ctx, msg, k)
case types.MsgEditValidator:
return handleMsgEditValidator(ctx, msg, k)
case types.MsgDelegate:
return handleMsgDelegateV1(ctx, msg, k)
case types.MsgUndelegate:
return handleMsgUndelegate(ctx, msg, k)
//case MsgSideChain
case types.MsgCreateSideChainValidator:
return handleMsgCreateSideChainValidator(ctx, msg, k)
case types.MsgEditSideChainValidator:
return handleMsgEditSideChainValidator(ctx, msg, k)
case types.MsgSideChainDelegate:
return handleMsgSideChainDelegate(ctx, msg, k)
case types.MsgSideChainRedelegate:
return handleMsgSideChainRedelegate(ctx, msg, k)
case types.MsgSideChainUndelegate:
return handleMsgSideChainUndelegate(ctx, msg, k)
default:
return sdk.ErrTxDecode("invalid message parse in staking module").Result()
}
}
}
func NewStakeHandler(k 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.MsgRedelegate:
return handleMsgRedelegate(ctx, msg, k)
case types.MsgBeginUnbonding:
return handleMsgBeginUnbonding(ctx, msg, k)
default:
return sdk.ErrTxDecode("invalid message parse in staking module").Result()
}
}
}
//_____________________________________________________________________
// These functions assume everything has been authenticated,
// now we just perform action and save
func handleMsgCreateValidatorAfterProposal(ctx sdk.Context, msg MsgCreateValidatorProposal, k keeper.Keeper, govKeeper gov.Keeper) sdk.Result {
height := ctx.BlockHeader().Height
// do not checkProposal for the genesis txs
if height != 0 {
if err := checkCreateProposal(ctx, k, govKeeper, msg); err != nil {
return ErrInvalidProposal(k.Codespace(), err.Error()).Result()
}
}
return handleMsgCreateValidator(ctx, msg.MsgCreateValidator, k)
}
func handleMsgRemoveValidatorAfterProposal(ctx sdk.Context, msg MsgRemoveValidator, k keeper.Keeper, govKeeper gov.Keeper) sdk.Result {
if err := checkRemoveProposal(ctx, k, govKeeper, msg); err != nil {
return ErrInvalidProposal(k.Codespace(), err.Error()).Result()
}
var tags sdk.Tags
var result sdk.Result
k.IterateDelegationsToValidator(ctx, msg.ValAddr, func(del sdk.Delegation) (stop bool) {
msgBeginUnbonding := MsgBeginUnbonding{
ValidatorAddr: del.GetValidatorAddr(),
DelegatorAddr: del.GetDelegatorAddr(),
SharesAmount: del.GetShares(),
}
result = handleMsgBeginUnbonding(ctx, msgBeginUnbonding, k)
// handleMsgBeginUnbonding return error, abort execution
if !result.IsOK() {
return true
}
tags = tags.AppendTags(result.Tags)
return false
})
// If there is a failure in handling MsgBeginUnbonding, return an error
if !result.IsOK() {
return result
}
return sdk.Result{Tags: tags}
}
func handleMsgCreateValidatorOpen(ctx sdk.Context, msg MsgCreateValidatorOpen, k keeper.Keeper) sdk.Result {
pubkey, err := sdk.GetConsPubKeyBech32(msg.PubKey)
if err != nil {
return ErrInvalidPubKey(k.Codespace()).Result()
}
msgCreateValidator := MsgCreateValidator{
Description: msg.Description,
Commission: msg.Commission,
DelegatorAddr: msg.DelegatorAddr,
ValidatorAddr: msg.ValidatorAddr,
PubKey: pubkey,
Delegation: msg.Delegation,
}
return handleMsgCreateValidator(ctx, msgCreateValidator, k)
}
func handleMsgCreateValidator(ctx sdk.Context, msg MsgCreateValidator, k keeper.Keeper) sdk.Result {
// consensus pubkey only support ed25519
if _, ok := msg.PubKey.(ed25519.PubKeyEd25519); !ok {
return ErrInvalidPubKey(k.Codespace()).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.BondDenom(ctx) {
return ErrBadDenom(k.Codespace()).Result()
}
if sdk.IsUpgrade(sdk.BEP159) {
minSelfDelegation := k.MinSelfDelegation(ctx)
if msg.Delegation.Amount < minSelfDelegation {
return ErrBadDelegationAmount(DefaultCodespace,
fmt.Sprintf("self delegation must not be less than %d", minSelfDelegation)).Result()
}
}
// self-delegate address will be used to collect fees.
feeAddr := msg.DelegatorAddr
validator := NewValidatorWithFeeAddr(feeAddr, 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 checkCreateProposal(ctx sdk.Context, keeper keeper.Keeper, govKeeper gov.Keeper, msg MsgCreateValidatorProposal) error {
proposal := govKeeper.GetProposal(ctx, msg.ProposalId)
if proposal == nil {
return fmt.Errorf("proposal %d does not exist", msg.ProposalId)
}
if proposal.GetProposalType() != gov.ProposalTypeCreateValidator {
return fmt.Errorf("proposal type %s is not equal to %s",
proposal.GetProposalType().String(), gov.ProposalTypeCreateValidator.String())
}
if proposal.GetStatus() != gov.StatusPassed {
return fmt.Errorf("proposal status %s is not not passed",
proposal.GetStatus().String())
}
var createValidatorJson CreateValidatorJsonMsg
err := json.Unmarshal([]byte(proposal.GetDescription()), &createValidatorJson)
if err != nil {
return fmt.Errorf("unmarshal createValidator params failed, err=%s", err.Error())
}
createValidatorMsgProposal, err := createValidatorJson.ToMsgCreateValidator()
if err != nil {
return fmt.Errorf("invalid pubkey, err=%s", err.Error())
}
if !msg.MsgCreateValidator.Equals(createValidatorMsgProposal) {
return fmt.Errorf("createValidator msg is not identical to the proposal one")
}
return nil
}
func checkRemoveProposal(ctx sdk.Context, keeper keeper.Keeper, govKeeper gov.Keeper, msg MsgRemoveValidator) error {
proposal := govKeeper.GetProposal(ctx, msg.ProposalId)
if proposal == nil {
return fmt.Errorf("proposal %d does not exist", msg.ProposalId)
}
if proposal.GetProposalType() != gov.ProposalTypeRemoveValidator {
return fmt.Errorf("proposal type %s is not equal to %s",
proposal.GetProposalType().String(), gov.ProposalTypeRemoveValidator.String())
}
if proposal.GetStatus() != gov.StatusPassed {
return fmt.Errorf("proposal status %s is not not passed",
proposal.GetStatus().String())
}
// Check proposal description
var proposalRemoveValidator MsgRemoveValidator
err := json.Unmarshal([]byte(proposal.GetDescription()), &proposalRemoveValidator)
if err != nil {
return fmt.Errorf("unmarshal removeValidator params failed, err=%s", err.Error())
}
if !msg.ValAddr.Equals(proposalRemoveValidator.ValAddr) || !msg.ValConsAddr.Equals(proposalRemoveValidator.ValConsAddr) {
return fmt.Errorf("removeValidator msg is not identical to the proposal one")
}
// Check validator information
validatorToRemove, ok := keeper.GetValidator(ctx, msg.ValAddr)
if !ok {
return fmt.Errorf("trying to remove a non-existing validator")
}
if !validatorToRemove.ConsAddress().Equals(msg.ValConsAddr) {
return fmt.Errorf("consensus address can't match actual validator consensus address")
}
// Check launcher authority
if sdk.ValAddress(msg.LauncherAddr).Equals(msg.ValAddr) {
return nil
}
// If the launcher isn't the target validator operator, then the launcher must be the operator of other active validator
launcherValidator, ok := keeper.GetValidator(ctx, sdk.ValAddress(msg.LauncherAddr))
if !ok {
return fmt.Errorf("the launcher is not a validator operator")
}
if launcherValidator.Status != sdk.Bonded {
return fmt.Errorf("the status of launcher validator is not bonded")
}
return nil
}
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()
}
onValidatorModified := false
if len(msg.PubKey) != 0 {
pubkey, err := sdk.GetConsPubKeyBech32(msg.PubKey)
if err != nil {
return ErrInvalidPubKey(k.Codespace()).Result()
}
// consensus pubkey only support ed25519
if _, ok := pubkey.(ed25519.PubKeyEd25519); !ok {
return ErrInvalidPubKey(k.Codespace()).Result()
}
_, found = k.GetValidatorByConsAddr(ctx, sdk.GetConsAddress(pubkey))
if found {
return ErrValidatorPubKeyExists(k.Codespace()).Result()
}
k.UpdateValidatorPubKey(ctx, validator, pubkey)
validator.ConsPubKey = pubkey
onValidatorModified = true
}
// 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
onValidatorModified = true
}
if onValidatorModified {
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,
}
}
// handleMsgDelegateV1 is used before we open staking to common users
func handleMsgDelegateV1(ctx sdk.Context, msg types.MsgDelegate, k keeper.Keeper) sdk.Result {
if selfDelegate, err := k.IsSelfDelegator(ctx, msg.DelegatorAddr, msg.ValidatorAddr); err != nil {
return err.Result()
} else if !selfDelegate {
return ErrNotSelfDelegate(k.Codespace()).Result()
}
return handleMsgDelegate(ctx, msg, k)
}
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.BondDenom(ctx) {
return ErrBadDenom(k.Codespace()).Result()
}
// we need this lower limit to prevent too many delegation records.
minDelegationChange := k.MinDelegationChange(ctx)
if msg.Delegation.Amount < minDelegationChange {
return ErrBadDelegationAmount(DefaultCodespace, fmt.Sprintf("delegation must not be less than %d", minDelegationChange)).Result()
}
if bytes.Equal(msg.DelegatorAddr.Bytes(), validator.OperatorAddr.Bytes()) {
// if validator uses a different self-delegator address, the operator address is not allowed to delegate to itself.
if !bytes.Equal(validator.OperatorAddr.Bytes(), validator.FeeAddr.Bytes()) {
return ErrInvalidDelegator(k.Codespace()).Result()
}
}
if validator.Jailed && !bytes.Equal(validator.FeeAddr, msg.DelegatorAddr) {
return ErrValidatorJailed(k.Codespace()).Result()
}
_, err := k.Delegate(ctx, msg.DelegatorAddr, msg.Delegation, validator, true)
if err != nil {
return err.Result()
}
// publish delegate event
if k.PbsbServer != nil && ctx.IsDeliverTx() {
event := types.ChainDelegateEvent{
DelegateEvent: types.DelegateEvent{
StakeEvent: types.StakeEvent{
IsFromTx: true,
},
Delegator: msg.DelegatorAddr,
Validator: msg.ValidatorAddr,
Amount: msg.Delegation.Amount,
Denom: msg.Delegation.Denom,
TxHash: ctx.Value(baseapp.TxHashKey).(string),
},
ChainId: ChainIDForBeaconChain,
}
k.PbsbServer.Publish(event)
}
tags := sdk.NewTags(
tags.Delegator, []byte(msg.DelegatorAddr.String()),
tags.DstValidator, []byte(msg.ValidatorAddr.String()),
)
return sdk.Result{
Tags: tags,
}
}
func handleMsgUndelegate(ctx sdk.Context, msg types.MsgUndelegate, k keeper.Keeper) sdk.Result {
if msg.Amount.Denom != k.BondDenom(ctx) {
return ErrBadDenom(k.Codespace()).Result()
}
shares, err := k.ValidateUnbondAmount(ctx, msg.DelegatorAddr, msg.ValidatorAddr, msg.Amount.Amount)
if err != nil {
return err.Result()
}
msgBeginUnbonding := types.MsgBeginUnbonding{
DelegatorAddr: msg.DelegatorAddr,
ValidatorAddr: msg.ValidatorAddr,
SharesAmount: shares,
}
res := handleMsgBeginUnbonding(ctx, msgBeginUnbonding, k)
if k.PbsbServer != nil && ctx.IsDeliverTx() {
event := types.ChainUndelegateEvent{
UndelegateEvent: types.UndelegateEvent{
StakeEvent: types.StakeEvent{
IsFromTx: true,
},
Delegator: msg.DelegatorAddr,
Validator: msg.ValidatorAddr,
Amount: msg.Amount.Amount,
Denom: msg.Amount.Denom,
TxHash: ctx.Value(baseapp.TxHashKey).(string),
},
ChainId: ChainIDForBeaconChain,
}
k.PbsbServer.Publish(event)
}
return res
}
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 handleMsgRedelegate(ctx sdk.Context, msg types.MsgRedelegate, k keeper.Keeper) sdk.Result {
if msg.Amount.Denom != k.BondDenom(ctx) {
return ErrBadDenom(k.Codespace()).Result()
}
dstValidator, found := k.GetValidator(ctx, msg.ValidatorDstAddr)
if !found {
return types.ErrBadRedelegationDst(k.Codespace()).Result()
}
if err := checkOperatorAsDelegator(k, msg.DelegatorAddr, dstValidator); err != nil {
return err.Result()
}
shares, err := k.ValidateUnbondAmount(ctx, msg.DelegatorAddr, msg.ValidatorSrcAddr, msg.Amount.Amount)
if err != nil {
return err.Result()
}
red, err := k.BeginRedelegation(ctx, msg.DelegatorAddr, msg.ValidatorSrcAddr,
msg.ValidatorDstAddr, shares)
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,
)
if k.PbsbServer != nil && ctx.IsDeliverTx() {
event := types.ChainRedelegateEvent{
RedelegateEvent: types.RedelegateEvent{
StakeEvent: types.StakeEvent{
IsFromTx: true,
},
Delegator: msg.DelegatorAddr,
SrcValidator: msg.ValidatorSrcAddr,
DstValidator: msg.ValidatorDstAddr,
Amount: msg.Amount.Amount,
Denom: msg.Amount.Denom,
TxHash: ctx.Value(baseapp.TxHashKey).(string),
},
ChainId: ChainIDForBeaconChain,
}
k.PbsbServer.Publish(event)
}
return sdk.Result{Data: finishTime, Tags: tags}
}