275 lines
8.5 KiB
Go
275 lines
8.5 KiB
Go
package staking
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import (
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"time"
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"github.com/tendermint/tendermint/libs/common"
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tmtypes "github.com/tendermint/tendermint/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cosmos/cosmos-sdk/x/staking/keeper"
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"github.com/cosmos/cosmos-sdk/x/staking/types"
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)
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func NewHandler(k keeper.Keeper) sdk.Handler {
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return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
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ctx = ctx.WithEventManager(sdk.NewEventManager())
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switch msg := msg.(type) {
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case types.MsgCreateValidator:
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return handleMsgCreateValidator(ctx, msg, k)
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case types.MsgEditValidator:
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return handleMsgEditValidator(ctx, msg, k)
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case types.MsgDelegate:
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return handleMsgDelegate(ctx, msg, k)
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case types.MsgBeginRedelegate:
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return handleMsgBeginRedelegate(ctx, msg, k)
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case types.MsgUndelegate:
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return handleMsgUndelegate(ctx, msg, k)
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default:
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return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
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}
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}
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}
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// These functions assume everything has been authenticated,
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// now we just perform action and save
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func handleMsgCreateValidator(ctx sdk.Context, msg types.MsgCreateValidator, k keeper.Keeper) (*sdk.Result, error) {
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// check to see if the pubkey or sender has been registered before
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if _, found := k.GetValidator(ctx, msg.ValidatorAddress); found {
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return nil, ErrValidatorOwnerExists
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}
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if _, found := k.GetValidatorByConsAddr(ctx, sdk.GetConsAddress(msg.PubKey)); found {
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return nil, ErrValidatorPubKeyExists
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}
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if msg.Value.Denom != k.BondDenom(ctx) {
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return nil, ErrBadDenom
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}
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if _, err := msg.Description.EnsureLength(); err != nil {
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return nil, err
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}
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if ctx.ConsensusParams() != nil {
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tmPubKey := tmtypes.TM2PB.PubKey(msg.PubKey)
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if !common.StringInSlice(tmPubKey.Type, ctx.ConsensusParams().Validator.PubKeyTypes) {
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return nil, sdkerrors.Wrapf(
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ErrValidatorPubKeyTypeNotSupported,
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"got: %s, valid: %s", tmPubKey.Type, ctx.ConsensusParams().Validator.PubKeyTypes,
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)
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}
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}
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validator := NewValidator(msg.ValidatorAddress, msg.PubKey, msg.Description)
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commission := NewCommissionWithTime(
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msg.Commission.Rate, msg.Commission.MaxRate,
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msg.Commission.MaxChangeRate, ctx.BlockHeader().Time,
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)
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validator, err := validator.SetInitialCommission(commission)
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if err != nil {
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return nil, err
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}
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validator.MinSelfDelegation = msg.MinSelfDelegation
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k.SetValidator(ctx, validator)
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k.SetValidatorByConsAddr(ctx, validator)
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k.SetNewValidatorByPowerIndex(ctx, validator)
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// call the after-creation hook
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k.AfterValidatorCreated(ctx, validator.OperatorAddress)
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// move coins from the msg.Address account to a (self-delegation) delegator account
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// the validator account and global shares are updated within here
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// NOTE source will always be from a wallet which are unbonded
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_, err = k.Delegate(ctx, msg.DelegatorAddress, msg.Value.Amount, sdk.Unbonded, validator, true)
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if err != nil {
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return nil, err
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}
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeCreateValidator,
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sdk.NewAttribute(types.AttributeKeyValidator, msg.ValidatorAddress.String()),
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sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Value.Amount.String()),
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, msg.DelegatorAddress.String()),
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),
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})
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return &sdk.Result{Events: ctx.EventManager().Events()}, nil
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}
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func handleMsgEditValidator(ctx sdk.Context, msg types.MsgEditValidator, k keeper.Keeper) (*sdk.Result, error) {
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// validator must already be registered
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validator, found := k.GetValidator(ctx, msg.ValidatorAddress)
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if !found {
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return nil, ErrNoValidatorFound
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}
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// replace all editable fields (clients should autofill existing values)
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description, err := validator.Description.UpdateDescription(msg.Description)
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if err != nil {
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return nil, err
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}
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validator.Description = description
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if msg.CommissionRate != nil {
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commission, err := k.UpdateValidatorCommission(ctx, validator, *msg.CommissionRate)
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if err != nil {
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return nil, err
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}
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// call the before-modification hook since we're about to update the commission
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k.BeforeValidatorModified(ctx, msg.ValidatorAddress)
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validator.Commission = commission
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}
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if msg.MinSelfDelegation != nil {
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if !msg.MinSelfDelegation.GT(validator.MinSelfDelegation) {
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return nil, ErrMinSelfDelegationDecreased
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}
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if msg.MinSelfDelegation.GT(validator.Tokens) {
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return nil, ErrSelfDelegationBelowMinimum
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}
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validator.MinSelfDelegation = (*msg.MinSelfDelegation)
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}
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k.SetValidator(ctx, validator)
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeEditValidator,
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sdk.NewAttribute(types.AttributeKeyCommissionRate, validator.Commission.String()),
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sdk.NewAttribute(types.AttributeKeyMinSelfDelegation, validator.MinSelfDelegation.String()),
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, msg.ValidatorAddress.String()),
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),
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})
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return &sdk.Result{Events: ctx.EventManager().Events()}, nil
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}
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func handleMsgDelegate(ctx sdk.Context, msg types.MsgDelegate, k keeper.Keeper) (*sdk.Result, error) {
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validator, found := k.GetValidator(ctx, msg.ValidatorAddress)
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if !found {
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return nil, ErrNoValidatorFound
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}
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if msg.Amount.Denom != k.BondDenom(ctx) {
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return nil, ErrBadDenom
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}
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// NOTE: source funds are always unbonded
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_, err := k.Delegate(ctx, msg.DelegatorAddress, msg.Amount.Amount, sdk.Unbonded, validator, true)
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if err != nil {
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return nil, err
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}
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeDelegate,
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sdk.NewAttribute(types.AttributeKeyValidator, msg.ValidatorAddress.String()),
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sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Amount.Amount.String()),
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, msg.DelegatorAddress.String()),
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),
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})
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return &sdk.Result{Events: ctx.EventManager().Events()}, nil
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}
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func handleMsgUndelegate(ctx sdk.Context, msg types.MsgUndelegate, k keeper.Keeper) (*sdk.Result, error) {
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shares, err := k.ValidateUnbondAmount(
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ctx, msg.DelegatorAddress, msg.ValidatorAddress, msg.Amount.Amount,
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)
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if err != nil {
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return nil, err
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}
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if msg.Amount.Denom != k.BondDenom(ctx) {
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return nil, ErrBadDenom
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}
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completionTime, err := k.Undelegate(ctx, msg.DelegatorAddress, msg.ValidatorAddress, shares)
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if err != nil {
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return nil, err
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}
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completionTimeBz := types.ModuleCdc.MustMarshalBinaryLengthPrefixed(completionTime)
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeUnbond,
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sdk.NewAttribute(types.AttributeKeyValidator, msg.ValidatorAddress.String()),
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sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Amount.Amount.String()),
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sdk.NewAttribute(types.AttributeKeyCompletionTime, completionTime.Format(time.RFC3339)),
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, msg.DelegatorAddress.String()),
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),
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})
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return &sdk.Result{Data: completionTimeBz, Events: ctx.EventManager().Events()}, nil
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}
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func handleMsgBeginRedelegate(ctx sdk.Context, msg types.MsgBeginRedelegate, k keeper.Keeper) (*sdk.Result, error) {
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shares, err := k.ValidateUnbondAmount(
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ctx, msg.DelegatorAddress, msg.ValidatorSrcAddress, msg.Amount.Amount,
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)
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if err != nil {
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return nil, err
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}
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if msg.Amount.Denom != k.BondDenom(ctx) {
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return nil, ErrBadDenom
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}
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completionTime, err := k.BeginRedelegation(
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ctx, msg.DelegatorAddress, msg.ValidatorSrcAddress, msg.ValidatorDstAddress, shares,
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)
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if err != nil {
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return nil, err
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}
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completionTimeBz := types.ModuleCdc.MustMarshalBinaryLengthPrefixed(completionTime)
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ctx.EventManager().EmitEvents(sdk.Events{
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sdk.NewEvent(
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types.EventTypeRedelegate,
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sdk.NewAttribute(types.AttributeKeySrcValidator, msg.ValidatorSrcAddress.String()),
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sdk.NewAttribute(types.AttributeKeyDstValidator, msg.ValidatorDstAddress.String()),
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sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Amount.Amount.String()),
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sdk.NewAttribute(types.AttributeKeyCompletionTime, completionTime.Format(time.RFC3339)),
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),
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, msg.DelegatorAddress.String()),
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),
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})
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return &sdk.Result{Data: completionTimeBz, Events: ctx.EventManager().Events()}, nil
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}
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