func (_Contract *ContractFilterer) ParseOwnerChanged(log types.Log) (*ContractOwnerChanged, error) {
	event := new(ContractOwnerChanged)
	if err := _Contract.contract.UnpackLog(event, "OwnerChanged", log); err != nil {
		return nil, err
	}
	return event, nil
}
ParseOwnerChanged is a log parse operation binding the contract event 0xa2ea9883a321a3e97b8266c2b078bfeec6d50c711ed71f874a90d500ae2eaf36.

Solidity: event OwnerChanged(address newOwner)
package deed
import (
	"math/big"
	"strings"
	ethereum "github.com/ethereum/go-ethereum"
	"github.com/ethereum/go-ethereum/accounts/abi"
	"github.com/ethereum/go-ethereum/accounts/abi/bind"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/event"
)
var (
	_ = big.NewInt
	_ = strings.NewReader
	_ = ethereum.NotFound
	_ = bind.Bind
	_ = common.Big1
	_ = types.BloomLookup
	_ = event.NewSubscription
)
const ContractABI = "[{\"constant\":true,\"inputs\":[],\"name\":\"creationDate\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"type\":\"function\"},{\"constant\":false,\"inputs\":[],\"name\":\"destroyDeed\",\"outputs\":[],\"payable\":false,\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"setOwner\",\"outputs\":[],\"payable\":false,\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"registrar\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"value\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"previousOwner\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"newValue\",\"type\":\"uint256\"},{\"name\":\"throwOnFailure\",\"type\":\"bool\"}],\"name\":\"setBalance\",\"outputs\":[],\"payable\":false,\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"refundRatio\",\"type\":\"uint256\"}],\"name\":\"closeDeed\",\"outputs\":[],\"payable\":false,\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"newRegistrar\",\"type\":\"address\"}],\"name\":\"setRegistrar\",\"outputs\":[],\"payable\":false,\"type\":\"function\"},{\"inputs\":[{\"name\":\"_owner\",\"type\":\"address\"}],\"payable\":true,\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnerChanged\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[],\"name\":\"DeedClosed\",\"type\":\"event\"}]"
type Contract struct {
	ContractCaller      
	ContractTransactor  
	ContractFilterer    
}
type ContractCaller struct {
	contract *bind.BoundContract  
}
type ContractTransactor struct {
	contract *bind.BoundContract  
}
type ContractFilterer struct {
	contract *bind.BoundContract  
}
type ContractSession struct {
	Contract     *Contract          
	CallOpts     bind.CallOpts      
	TransactOpts bind.TransactOpts  
}
type ContractCallerSession struct {
	Contract *ContractCaller  
	CallOpts bind.CallOpts    
}
type ContractTransactorSession struct {
	Contract     *ContractTransactor  
	TransactOpts bind.TransactOpts    
}
type ContractRaw struct {
	Contract *Contract  
}
type ContractCallerRaw struct {
	Contract *ContractCaller  
}
type ContractTransactorRaw struct {
	Contract *ContractTransactor  
}
func NewContract(address common.Address, backend bind.ContractBackend) (*Contract, error) {
	contract, err := bindContract(address, backend, backend, backend)
	if err != nil {
		return nil, err
	}
	return &Contract{ContractCaller: ContractCaller{contract: contract}, ContractTransactor: ContractTransactor{contract: contract}, ContractFilterer: ContractFilterer{contract: contract}}, nil
}
func NewContractCaller(address common.Address, caller bind.ContractCaller) (*ContractCaller, error) {
	contract, err := bindContract(address, caller, nil, nil)
	if err != nil {
		return nil, err
	}
	return &ContractCaller{contract: contract}, nil
}
func NewContractTransactor(address common.Address, transactor bind.ContractTransactor) (*ContractTransactor, error) {
	contract, err := bindContract(address, nil, transactor, nil)
	if err != nil {
		return nil, err
	}
	return &ContractTransactor{contract: contract}, nil
}
func NewContractFilterer(address common.Address, filterer bind.ContractFilterer) (*ContractFilterer, error) {
	contract, err := bindContract(address, nil, nil, filterer)
	if err != nil {
		return nil, err
	}
	return &ContractFilterer{contract: contract}, nil
}
func bindContract(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
	parsed, err := abi.JSON(strings.NewReader(ContractABI))
	if err != nil {
		return nil, err
	}
	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
}
func (_Contract *ContractRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
	return _Contract.Contract.ContractCaller.contract.Call(opts, result, method, params...)
}
func (_Contract *ContractRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
	return _Contract.Contract.ContractTransactor.contract.Transfer(opts)
}
func (_Contract *ContractRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
	return _Contract.Contract.ContractTransactor.contract.Transact(opts, method, params...)
}
func (_Contract *ContractCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
	return _Contract.Contract.contract.Call(opts, result, method, params...)
}
func (_Contract *ContractTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
	return _Contract.Contract.contract.Transfer(opts)
}
func (_Contract *ContractTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
	return _Contract.Contract.contract.Transact(opts, method, params...)
}
func (_Contract *ContractCaller) CreationDate(opts *bind.CallOpts) (*big.Int, error) {
	var out []interface{}
	err := _Contract.contract.Call(opts, &out, "creationDate")
	if err != nil {
		return *new(*big.Int), err
	}
	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
	return out0, err
}
func (_Contract *ContractSession) CreationDate() (*big.Int, error) {
	return _Contract.Contract.CreationDate(&_Contract.CallOpts)
}
func (_Contract *ContractCallerSession) CreationDate() (*big.Int, error) {
	return _Contract.Contract.CreationDate(&_Contract.CallOpts)
}
func (_Contract *ContractCaller) Owner(opts *bind.CallOpts) (common.Address, error) {
	var out []interface{}
	err := _Contract.contract.Call(opts, &out, "owner")
	if err != nil {
		return *new(common.Address), err
	}
	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
	return out0, err
}
func (_Contract *ContractSession) Owner() (common.Address, error) {
	return _Contract.Contract.Owner(&_Contract.CallOpts)
}
func (_Contract *ContractCallerSession) Owner() (common.Address, error) {
	return _Contract.Contract.Owner(&_Contract.CallOpts)
}
func (_Contract *ContractCaller) PreviousOwner(opts *bind.CallOpts) (common.Address, error) {
	var out []interface{}
	err := _Contract.contract.Call(opts, &out, "previousOwner")
	if err != nil {
		return *new(common.Address), err
	}
	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
	return out0, err
}
func (_Contract *ContractSession) PreviousOwner() (common.Address, error) {
	return _Contract.Contract.PreviousOwner(&_Contract.CallOpts)
}
func (_Contract *ContractCallerSession) PreviousOwner() (common.Address, error) {
	return _Contract.Contract.PreviousOwner(&_Contract.CallOpts)
}
func (_Contract *ContractCaller) Registrar(opts *bind.CallOpts) (common.Address, error) {
	var out []interface{}
	err := _Contract.contract.Call(opts, &out, "registrar")
	if err != nil {
		return *new(common.Address), err
	}
	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
	return out0, err
}
func (_Contract *ContractSession) Registrar() (common.Address, error) {
	return _Contract.Contract.Registrar(&_Contract.CallOpts)
}
func (_Contract *ContractCallerSession) Registrar() (common.Address, error) {
	return _Contract.Contract.Registrar(&_Contract.CallOpts)
}
func (_Contract *ContractCaller) Value(opts *bind.CallOpts) (*big.Int, error) {
	var out []interface{}
	err := _Contract.contract.Call(opts, &out, "value")
	if err != nil {
		return *new(*big.Int), err
	}
	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
	return out0, err
}
func (_Contract *ContractSession) Value() (*big.Int, error) {
	return _Contract.Contract.Value(&_Contract.CallOpts)
}
func (_Contract *ContractCallerSession) Value() (*big.Int, error) {
	return _Contract.Contract.Value(&_Contract.CallOpts)
}
func (_Contract *ContractTransactor) CloseDeed(opts *bind.TransactOpts, refundRatio *big.Int) (*types.Transaction, error) {
	return _Contract.contract.Transact(opts, "closeDeed", refundRatio)
}
func (_Contract *ContractSession) CloseDeed(refundRatio *big.Int) (*types.Transaction, error) {
	return _Contract.Contract.CloseDeed(&_Contract.TransactOpts, refundRatio)
}
func (_Contract *ContractTransactorSession) CloseDeed(refundRatio *big.Int) (*types.Transaction, error) {
	return _Contract.Contract.CloseDeed(&_Contract.TransactOpts, refundRatio)
}
func (_Contract *ContractTransactor) DestroyDeed(opts *bind.TransactOpts) (*types.Transaction, error) {
	return _Contract.contract.Transact(opts, "destroyDeed")
}
func (_Contract *ContractSession) DestroyDeed() (*types.Transaction, error) {
	return _Contract.Contract.DestroyDeed(&_Contract.TransactOpts)
}
func (_Contract *ContractTransactorSession) DestroyDeed() (*types.Transaction, error) {
	return _Contract.Contract.DestroyDeed(&_Contract.TransactOpts)
}
func (_Contract *ContractTransactor) SetBalance(opts *bind.TransactOpts, newValue *big.Int, throwOnFailure bool) (*types.Transaction, error) {
	return _Contract.contract.Transact(opts, "setBalance", newValue, throwOnFailure)
}
func (_Contract *ContractSession) SetBalance(newValue *big.Int, throwOnFailure bool) (*types.Transaction, error) {
	return _Contract.Contract.SetBalance(&_Contract.TransactOpts, newValue, throwOnFailure)
}
func (_Contract *ContractTransactorSession) SetBalance(newValue *big.Int, throwOnFailure bool) (*types.Transaction, error) {
	return _Contract.Contract.SetBalance(&_Contract.TransactOpts, newValue, throwOnFailure)
}
func (_Contract *ContractTransactor) SetOwner(opts *bind.TransactOpts, newOwner common.Address) (*types.Transaction, error) {
	return _Contract.contract.Transact(opts, "setOwner", newOwner)
}
func (_Contract *ContractSession) SetOwner(newOwner common.Address) (*types.Transaction, error) {
	return _Contract.Contract.SetOwner(&_Contract.TransactOpts, newOwner)
}
func (_Contract *ContractTransactorSession) SetOwner(newOwner common.Address) (*types.Transaction, error) {
	return _Contract.Contract.SetOwner(&_Contract.TransactOpts, newOwner)
}
func (_Contract *ContractTransactor) SetRegistrar(opts *bind.TransactOpts, newRegistrar common.Address) (*types.Transaction, error) {
	return _Contract.contract.Transact(opts, "setRegistrar", newRegistrar)
}
func (_Contract *ContractSession) SetRegistrar(newRegistrar common.Address) (*types.Transaction, error) {
	return _Contract.Contract.SetRegistrar(&_Contract.TransactOpts, newRegistrar)
}
func (_Contract *ContractTransactorSession) SetRegistrar(newRegistrar common.Address) (*types.Transaction, error) {
	return _Contract.Contract.SetRegistrar(&_Contract.TransactOpts, newRegistrar)
}
type ContractDeedClosedIterator struct {
	Event *ContractDeedClosed  
	contract *bind.BoundContract  
	event    string               
	logs chan types.Log         
	sub  ethereum.Subscription  
	done bool                   
	fail error                  
}
func (it *ContractDeedClosedIterator) Next() bool {
	if it.fail != nil {
		return false
	}
	if it.done {
		select {
		case log := <-it.logs:
			it.Event = new(ContractDeedClosed)
			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
				it.fail = err
				return false
			}
			it.Event.Raw = log
			return true
		default:
			return false
		}
	}
	select {
	case log := <-it.logs:
		it.Event = new(ContractDeedClosed)
		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
			it.fail = err
			return false
		}
		it.Event.Raw = log
		return true
	case err := <-it.sub.Err():
		it.done = true
		it.fail = err
		return it.Next()
	}
}
func (it *ContractDeedClosedIterator) Error() error {
	return it.fail
}
func (it *ContractDeedClosedIterator) Close() error {
	it.sub.Unsubscribe()
	return nil
}
type ContractDeedClosed struct {
	Raw types.Log  
}
func (_Contract *ContractFilterer) FilterDeedClosed(opts *bind.FilterOpts) (*ContractDeedClosedIterator, error) {
	logs, sub, err := _Contract.contract.FilterLogs(opts, "DeedClosed")
	if err != nil {
		return nil, err
	}
	return &ContractDeedClosedIterator{contract: _Contract.contract, event: "DeedClosed", logs: logs, sub: sub}, nil
}
func (_Contract *ContractFilterer) WatchDeedClosed(opts *bind.WatchOpts, sink chan<- *ContractDeedClosed) (event.Subscription, error) {
	logs, sub, err := _Contract.contract.WatchLogs(opts, "DeedClosed")
	if err != nil {
		return nil, err
	}
	return event.NewSubscription(func(quit <-chan struct{}) error {
		defer sub.Unsubscribe()
		for {
			select {
			case log := <-logs:
				event := new(ContractDeedClosed)
				if err := _Contract.contract.UnpackLog(event, "DeedClosed", log); err != nil {
					return err
				}
				event.Raw = log
				select {
				case sink <- event:
				case err := <-sub.Err():
					return err
				case <-quit:
					return nil
				}
			case err := <-sub.Err():
				return err
			case <-quit:
				return nil
			}
		}
	}), nil
}
func (_Contract *ContractFilterer) ParseDeedClosed(log types.Log) (*ContractDeedClosed, error) {
	event := new(ContractDeedClosed)
	if err := _Contract.contract.UnpackLog(event, "DeedClosed", log); err != nil {
		return nil, err
	}
	return event, nil
}
type ContractOwnerChangedIterator struct {
	Event *ContractOwnerChanged  
	contract *bind.BoundContract  
	event    string               
	logs chan types.Log         
	sub  ethereum.Subscription  
	done bool                   
	fail error                  
}
func (it *ContractOwnerChangedIterator) Next() bool {
	if it.fail != nil {
		return false
	}
	if it.done {
		select {
		case log := <-it.logs:
			it.Event = new(ContractOwnerChanged)
			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
				it.fail = err
				return false
			}
			it.Event.Raw = log
			return true
		default:
			return false
		}
	}
	select {
	case log := <-it.logs:
		it.Event = new(ContractOwnerChanged)
		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
			it.fail = err
			return false
		}
		it.Event.Raw = log
		return true
	case err := <-it.sub.Err():
		it.done = true
		it.fail = err
		return it.Next()
	}
}
func (it *ContractOwnerChangedIterator) Error() error {
	return it.fail
}
func (it *ContractOwnerChangedIterator) Close() error {
	it.sub.Unsubscribe()
	return nil
}
type ContractOwnerChanged struct {
	NewOwner common.Address
	Raw      types.Log  
}
func (_Contract *ContractFilterer) FilterOwnerChanged(opts *bind.FilterOpts) (*ContractOwnerChangedIterator, error) {
	logs, sub, err := _Contract.contract.FilterLogs(opts, "OwnerChanged")
	if err != nil {
		return nil, err
	}
	return &ContractOwnerChangedIterator{contract: _Contract.contract, event: "OwnerChanged", logs: logs, sub: sub}, nil
}
func (_Contract *ContractFilterer) WatchOwnerChanged(opts *bind.WatchOpts, sink chan<- *ContractOwnerChanged) (event.Subscription, error) {
	logs, sub, err := _Contract.contract.WatchLogs(opts, "OwnerChanged")
	if err != nil {
		return nil, err
	}
	return event.NewSubscription(func(quit <-chan struct{}) error {
		defer sub.Unsubscribe()
		for {
			select {
			case log := <-logs:
				event := new(ContractOwnerChanged)
				if err := _Contract.contract.UnpackLog(event, "OwnerChanged", log); err != nil {
					return err
				}
				event.Raw = log
				select {
				case sink <- event:
				case err := <-sub.Err():
					return err
				case <-quit:
					return nil
				}
			case err := <-sub.Err():
				return err
			case <-quit:
				return nil
			}
		}
	}), nil
}