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ante.go
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ante.go
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package ante
import (
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
)
type RejectDelegateVolunteerValidatorDecorator struct {
volunteerKeeper VolunteerKeeper
}
func NewRejectDelegateVolunteerValidatorDecorator(vk VolunteerKeeper) RejectDelegateVolunteerValidatorDecorator {
return RejectDelegateVolunteerValidatorDecorator{
volunteerKeeper: vk,
}
}
func (rdvvd RejectDelegateVolunteerValidatorDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (newCtx sdk.Context, err error) {
if ctx.GasMeter().Limit() == 0 && simulate {
return next(ctx, tx, simulate)
}
for _, msg := range tx.GetMsgs() {
switch msg := msg.(type) {
case *stakingtypes.MsgDelegate:
if err := rdvvd.checkVolunteerValidator(ctx, msg.ValidatorAddress, msg.DelegatorAddress); err != nil {
return ctx, err
}
case *stakingtypes.MsgBeginRedelegate:
if err := rdvvd.checkVolunteerValidator(ctx, msg.ValidatorSrcAddress, msg.DelegatorAddress); err != nil {
return ctx, err
}
if err := rdvvd.checkVolunteerValidator(ctx, msg.ValidatorDstAddress, msg.DelegatorAddress); err != nil {
return ctx, err
}
case *stakingtypes.MsgUndelegate:
if err := rdvvd.checkVolunteerValidator(ctx, msg.ValidatorAddress, msg.DelegatorAddress); err != nil {
return ctx, err
}
}
}
return next(ctx, tx, simulate)
}
func (rdvvd RejectDelegateVolunteerValidatorDecorator) checkVolunteerValidator(ctx sdk.Context, validatorAddress, delegatorAddress string) error {
valAddress, err := sdk.ValAddressFromBech32(validatorAddress)
if err != nil {
return sdkerrors.Wrapf(sdkerrors.ErrInvalidAddress, err.Error())
}
if _, found := rdvvd.volunteerKeeper.GetVolunteerValidator(ctx, valAddress); found {
delAddress, err := sdk.AccAddressFromBech32(delegatorAddress)
if err != nil {
return sdkerrors.Wrapf(sdkerrors.ErrInvalidAddress, err.Error())
}
if delAddress.Equals(valAddress) {
return nil
}
return sdkerrors.Wrapf(sdkerrors.ErrInvalidRequest, "cannot delegate to volunteer validator")
}
return nil
}