func (_Datatrust *DatatrustSession) GetBackendUrl() (string, error) {
	return _Datatrust.Contract.GetBackendUrl(&_Datatrust.CallOpts)
}
GetBackendUrl is a free data retrieval call binding the contract method 0x76e12635.

Solidity: function getBackendUrl() constant returns(string out)
package datatrust
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
	_ = abi.U256
	_ = bind.Bind
	_ = common.Big1
	_ = types.BloomLookup
	_ = event.NewSubscription
)
const DatatrustABI = "[{\"name\":\"Registered\",\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\",\"indexed\":true},{\"type\":\"address\",\"name\":\"registrant\",\"indexed\":true}],\"anonymous\":false,\"type\":\"event\"},{\"name\":\"RegistrationSucceeded\",\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\",\"indexed\":true},{\"type\":\"address\",\"name\":\"registrant\",\"indexed\":true}],\"anonymous\":false,\"type\":\"event\"},{\"name\":\"RegistrationFailed\",\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\",\"indexed\":true},{\"type\":\"address\",\"name\":\"registrant\",\"indexed\":true}],\"anonymous\":false,\"type\":\"event\"},{\"name\":\"DeliveryRequested\",\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\",\"indexed\":true},{\"type\":\"address\",\"name\":\"requester\",\"indexed\":true},{\"type\":\"uint256\",\"name\":\"amount\",\"indexed\":false}],\"anonymous\":false,\"type\":\"event\"},{\"name\":\"Delivered\",\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\",\"indexed\":true},{\"type\":\"address\",\"name\":\"owner\",\"indexed\":true},{\"type\":\"bytes32\",\"name\":\"url\",\"indexed\":false}],\"anonymous\":false,\"type\":\"event\"},{\"name\":\"ListingAccessed\",\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\",\"indexed\":true},{\"type\":\"bytes32\",\"name\":\"delivery\",\"indexed\":true},{\"type\":\"uint256\",\"name\":\"amount\",\"indexed\":false}],\"anonymous\":false,\"type\":\"event\"},{\"outputs\":[],\"inputs\":[{\"type\":\"address\",\"name\":\"ether_token_addr\"},{\"type\":\"address\",\"name\":\"voting_addr\"},{\"type\":\"address\",\"name\":\"p11r_addr\"},{\"type\":\"address\",\"name\":\"res_addr\"}],\"constant\":false,\"payable\":false,\"type\":\"constructor\"},{\"name\":\"getPrivileged\",\"outputs\":[{\"type\":\"address\",\"name\":\"out\"}],\"inputs\":[],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":551},{\"name\":\"getReserve\",\"outputs\":[{\"type\":\"address\",\"name\":\"out\"}],\"inputs\":[],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":581},{\"name\":\"setPrivileged\",\"outputs\":[],\"inputs\":[{\"type\":\"address\",\"name\":\"listing\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":35998},{\"name\":\"getHash\",\"outputs\":[{\"type\":\"bytes32\",\"name\":\"out\"}],\"inputs\":[{\"type\":\"string\",\"name\":\"url\"}],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":665},{\"name\":\"getBackendAddress\",\"outputs\":[{\"type\":\"address\",\"name\":\"out\"}],\"inputs\":[],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":671},{\"name\":\"getBackendUrl\",\"outputs\":[{\"type\":\"string\",\"name\":\"out\"}],\"inputs\":[],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":22831},{\"name\":\"setBackendUrl\",\"outputs\":[],\"inputs\":[{\"type\":\"string\",\"name\":\"url\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":176987},{\"name\":\"getDataHash\",\"outputs\":[{\"type\":\"bytes32\",\"name\":\"out\"}],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"}],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":876},{\"name\":\"setDataHash\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"listing\"},{\"type\":\"bytes32\",\"name\":\"data\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":35963},{\"name\":\"removeDataHash\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":20990},{\"name\":\"register\",\"outputs\":[],\"inputs\":[{\"type\":\"string\",\"name\":\"url\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":10292},{\"name\":\"resolveRegistration\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":68704},{\"name\":\"requestDelivery\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"},{\"type\":\"uint256\",\"name\":\"amount\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":225422},{\"name\":\"getBytesPurchased\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"out\"}],\"inputs\":[{\"type\":\"address\",\"name\":\"addr\"}],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":1095},{\"name\":\"getDelivery\",\"outputs\":[{\"type\":\"address\",\"name\":\"out\"},{\"type\":\"uint256\",\"name\":\"out\"},{\"type\":\"uint256\",\"name\":\"out\"}],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"}],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":2037},{\"name\":\"listingAccessed\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"listing\"},{\"type\":\"bytes32\",\"name\":\"delivery\"},{\"type\":\"uint256\",\"name\":\"amount\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":120067},{\"name\":\"getAccessRewardEarned\",\"outputs\":[{\"type\":\"uint256\",\"unit\":\"wei\",\"name\":\"out\"}],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"}],\"constant\":true,\"payable\":false,\"type\":\"function\",\"gas\":1146},{\"name\":\"accessRewardClaimed\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"hash\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":24131},{\"name\":\"delivered\",\"outputs\":[],\"inputs\":[{\"type\":\"bytes32\",\"name\":\"delivery\"},{\"type\":\"bytes32\",\"name\":\"url\"}],\"constant\":false,\"payable\":false,\"type\":\"function\",\"gas\":136010}]"
const DatatrustBin = `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func DeployDatatrust(auth *bind.TransactOpts, backend bind.ContractBackend, ether_token_addr common.Address, voting_addr common.Address, p11r_addr common.Address, res_addr common.Address) (common.Address, *types.Transaction, *Datatrust, error) {
	parsed, err := abi.JSON(strings.NewReader(DatatrustABI))
	if err != nil {
		return common.Address{}, nil, nil, err
	}
	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(DatatrustBin), backend, ether_token_addr, voting_addr, p11r_addr, res_addr)
	if err != nil {
		return common.Address{}, nil, nil, err
	}
	return address, tx, &Datatrust{DatatrustCaller: DatatrustCaller{contract: contract}, DatatrustTransactor: DatatrustTransactor{contract: contract}, DatatrustFilterer: DatatrustFilterer{contract: contract}}, nil
}
type Datatrust struct {
	DatatrustCaller      
	DatatrustTransactor  
	DatatrustFilterer    
}
type DatatrustCaller struct {
	contract *bind.BoundContract  
}
type DatatrustTransactor struct {
	contract *bind.BoundContract  
}
type DatatrustFilterer struct {
	contract *bind.BoundContract  
}
type DatatrustSession struct {
	Contract     *Datatrust         
	CallOpts     bind.CallOpts      
	TransactOpts bind.TransactOpts  
}
type DatatrustCallerSession struct {
	Contract *DatatrustCaller  
	CallOpts bind.CallOpts     
}
type DatatrustTransactorSession struct {
	Contract     *DatatrustTransactor  
	TransactOpts bind.TransactOpts     
}
type DatatrustRaw struct {
	Contract *Datatrust  
}
type DatatrustCallerRaw struct {
	Contract *DatatrustCaller  
}
type DatatrustTransactorRaw struct {
	Contract *DatatrustTransactor  
}
func NewDatatrust(address common.Address, backend bind.ContractBackend) (*Datatrust, error) {
	contract, err := bindDatatrust(address, backend, backend, backend)
	if err != nil {
		return nil, err
	}
	return &Datatrust{DatatrustCaller: DatatrustCaller{contract: contract}, DatatrustTransactor: DatatrustTransactor{contract: contract}, DatatrustFilterer: DatatrustFilterer{contract: contract}}, nil
}
func NewDatatrustCaller(address common.Address, caller bind.ContractCaller) (*DatatrustCaller, error) {
	contract, err := bindDatatrust(address, caller, nil, nil)
	if err != nil {
		return nil, err
	}
	return &DatatrustCaller{contract: contract}, nil
}
func NewDatatrustTransactor(address common.Address, transactor bind.ContractTransactor) (*DatatrustTransactor, error) {
	contract, err := bindDatatrust(address, nil, transactor, nil)
	if err != nil {
		return nil, err
	}
	return &DatatrustTransactor{contract: contract}, nil
}
func NewDatatrustFilterer(address common.Address, filterer bind.ContractFilterer) (*DatatrustFilterer, error) {
	contract, err := bindDatatrust(address, nil, nil, filterer)
	if err != nil {
		return nil, err
	}
	return &DatatrustFilterer{contract: contract}, nil
}
func bindDatatrust(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
	parsed, err := abi.JSON(strings.NewReader(DatatrustABI))
	if err != nil {
		return nil, err
	}
	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
}
func (_Datatrust *DatatrustRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
	return _Datatrust.Contract.DatatrustCaller.contract.Call(opts, result, method, params...)
}
func (_Datatrust *DatatrustRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
	return _Datatrust.Contract.DatatrustTransactor.contract.Transfer(opts)
}
func (_Datatrust *DatatrustRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
	return _Datatrust.Contract.DatatrustTransactor.contract.Transact(opts, method, params...)
}
func (_Datatrust *DatatrustCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
	return _Datatrust.Contract.contract.Call(opts, result, method, params...)
}
func (_Datatrust *DatatrustTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
	return _Datatrust.Contract.contract.Transfer(opts)
}
func (_Datatrust *DatatrustTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
	return _Datatrust.Contract.contract.Transact(opts, method, params...)
}
func (_Datatrust *DatatrustCaller) GetAccessRewardEarned(opts *bind.CallOpts, hash [32]byte) (*big.Int, error) {
	var (
		ret0 = new(*big.Int)
	)
	out := ret0
	err := _Datatrust.contract.Call(opts, out, "getAccessRewardEarned", hash)
	return *ret0, err
}
func (_Datatrust *DatatrustSession) GetAccessRewardEarned(hash [32]byte) (*big.Int, error) {
	return _Datatrust.Contract.GetAccessRewardEarned(&_Datatrust.CallOpts, hash)
}
func (_Datatrust *DatatrustCallerSession) GetAccessRewardEarned(hash [32]byte) (*big.Int, error) {
	return _Datatrust.Contract.GetAccessRewardEarned(&_Datatrust.CallOpts, hash)
}
func (_Datatrust *DatatrustCaller) GetBackendAddress(opts *bind.CallOpts) (common.Address, error) {
	var (
		ret0 = new(common.Address)
	)
	out := ret0
	err := _Datatrust.contract.Call(opts, out, "getBackendAddress")
	return *ret0, err
}
func (_Datatrust *DatatrustSession) GetBackendAddress() (common.Address, error) {
	return _Datatrust.Contract.GetBackendAddress(&_Datatrust.CallOpts)
}
func (_Datatrust *DatatrustCallerSession) GetBackendAddress() (common.Address, error) {
	return _Datatrust.Contract.GetBackendAddress(&_Datatrust.CallOpts)
}
func (_Datatrust *DatatrustCaller) GetBackendUrl(opts *bind.CallOpts) (string, error) {
	var (
		ret0 = new(string)
	)
	out := ret0
	err := _Datatrust.contract.Call(opts, out, "getBackendUrl")
	return *ret0, err
}