func (k Keeper) CheckPausedZRC20(ctx sdk.Context, receipt *ethtypes.Receipt) error {
-	if receipt == nil {
-		return nil
-	}

	// get non-duplicated list of all addresses that emitted logs
	var addresses []ethcommon.Address
	if !res.Failed() {
		receipt.Status = ethtypes.ReceiptStatusSuccessful
		// Only call hooks if tx executed successfully.
		if err = k.PostTxProcessing(tmpCtx, msg, receipt); err != nil {
			// If hooks return error, revert the whole tx.
			res.VmError = types.ErrPostTxProcessing.Error()
			k.Logger(ctx).Error("tx post processing failed", "error", err)
                        ...
