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handler.go
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handler.go
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package slash
import (
"fmt"
"github.com/celer-network/sgn/seal"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
// NewHandler returns a handler for "slash" type messages.
func NewHandler(keeper Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
logEntry := seal.NewMsgLog()
ctx = ctx.WithEventManager(sdk.NewEventManager())
var res *sdk.Result
var err error
switch msg := msg.(type) {
case MsgSignPenalty:
res, err = handleMsgSignPenalty(ctx, keeper, msg, logEntry)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
}
if err != nil {
logEntry.Error = append(logEntry.Error, err.Error())
}
seal.CommitMsgLog(logEntry)
return res, err
}
}
// Handle a message to sign penalty
func handleMsgSignPenalty(ctx sdk.Context, keeper Keeper, msg MsgSignPenalty, logEntry *seal.MsgLog) (*sdk.Result, error) {
logEntry.Type = msg.Type()
logEntry.Sender = msg.Sender.String()
logEntry.Penalty.Nonce = msg.Nonce
res := &sdk.Result{}
validator, found := keeper.validatorKeeper.GetValidator(ctx, sdk.ValAddress(msg.Sender))
if !found {
return res, fmt.Errorf("Sender is not validator")
}
if validator.Status != sdk.Bonded {
return res, fmt.Errorf("Validator is not bonded")
}
penalty, found := keeper.GetPenalty(ctx, msg.Nonce)
if !found {
return res, fmt.Errorf("Penalty does not exist")
}
logEntry.Penalty.Validator = penalty.ValidatorAddr
logEntry.Penalty.Reason = penalty.Reason
err := penalty.AddSig(msg.Sig, validator.Description.Identity)
if err != nil {
return res, fmt.Errorf(fmt.Sprintf("Failed to add sig: %s", err))
}
keeper.SetPenalty(ctx, penalty)
return res, nil
}