From cfc246a3a12ee53e8874398e54402594a9a64038 Mon Sep 17 00:00:00 2001
From: bahadylbekov <33404905+bahadylbekov@users.noreply.github.com>
Date: Tue, 4 Aug 2020 20:19:42 +0200
Subject: [PATCH] add: ethereum rpc wallet operation, send transaction method,
 smart contracts golang artifacts

---
 .gitignore                                    |    3 +-
 contracts/Aggregator.go                       |  193 +
 contracts/Mediator.go                         |  573 ++
 contracts/OracleEmitter.go                    |  329 ++
 contracts/Ownable.go                          |  397 ++
 contracts/Whitelist.go                        |  491 ++
 eth-contracts/.env-sample                     |    6 +
 eth-contracts/README.md                       |    3 +
 eth-contracts/build/Aggregator.abi            |    1 +
 eth-contracts/build/Mediator.abi              |    1 +
 eth-contracts/build/OracleEmitter.abi         |    1 +
 eth-contracts/build/Ownable.abi               |    1 +
 eth-contracts/build/Whitelist.abi             |    1 +
 eth-contracts/contracts/Aggregator.sol        |   25 +
 eth-contracts/contracts/Mediator.sol          |   29 +
 eth-contracts/contracts/OracleEmitter.sol     |   19 +
 eth-contracts/contracts/Whitelist.sol         |   34 +
 .../migrations/1_initial_migration.js         |   18 +
 eth-contracts/package-lock.json               | 4631 +++++++++++++++++
 eth-contracts/package.json                    |   19 +
 eth-contracts/test/.gitkeep                   |    0
 eth-contracts/truffle-config.js               |   41 +
 go.mod                                        |   13 +-
 go.sum                                        |   58 +
 main.go => p2p-oracle-node.go                 |    0
 rpcclient/ethereum.go                         |  132 +-
 rpcclient/lotus.go                            |    1 +
 27 files changed, 7005 insertions(+), 15 deletions(-)
 create mode 100644 contracts/Aggregator.go
 create mode 100644 contracts/Mediator.go
 create mode 100644 contracts/OracleEmitter.go
 create mode 100644 contracts/Ownable.go
 create mode 100644 contracts/Whitelist.go
 create mode 100644 eth-contracts/.env-sample
 create mode 100644 eth-contracts/README.md
 create mode 100644 eth-contracts/build/Aggregator.abi
 create mode 100644 eth-contracts/build/Mediator.abi
 create mode 100644 eth-contracts/build/OracleEmitter.abi
 create mode 100644 eth-contracts/build/Ownable.abi
 create mode 100644 eth-contracts/build/Whitelist.abi
 create mode 100644 eth-contracts/contracts/Aggregator.sol
 create mode 100644 eth-contracts/contracts/Mediator.sol
 create mode 100644 eth-contracts/contracts/OracleEmitter.sol
 create mode 100644 eth-contracts/contracts/Whitelist.sol
 create mode 100644 eth-contracts/migrations/1_initial_migration.js
 create mode 100644 eth-contracts/package-lock.json
 create mode 100644 eth-contracts/package.json
 create mode 100644 eth-contracts/test/.gitkeep
 create mode 100644 eth-contracts/truffle-config.js
 rename main.go => p2p-oracle-node.go (100%)
 create mode 100644 rpcclient/lotus.go

diff --git a/.gitignore b/.gitignore
index cec8ed6..9109806 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,4 +16,5 @@ vendor/
 .vscode/
 
 # Environment files
-.env
\ No newline at end of file
+.env
+eth-contracts/node_modules
\ No newline at end of file
diff --git a/contracts/Aggregator.go b/contracts/Aggregator.go
new file mode 100644
index 0000000..3c37eb6
--- /dev/null
+++ b/contracts/Aggregator.go
@@ -0,0 +1,193 @@
+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package contracts
+
+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"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// SmartcontractsABI is the input ABI used to generate the binding from.
+const SmartcontractsABI = "[{\"inputs\":[{\"internalType\":\"contractWhitelist\",\"name\":\"_whitelist\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"reqID\",\"type\":\"uint256\"},{\"internalType\":\"string\",\"name\":\"data\",\"type\":\"string\"},{\"internalType\":\"address\",\"name\":\"callbackAddress\",\"type\":\"address\"},{\"internalType\":\"bytes4\",\"name\":\"callbackMethodID\",\"type\":\"bytes4\"}],\"name\":\"collectData\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// Smartcontracts is an auto generated Go binding around an Ethereum contract.
+type Smartcontracts struct {
+	SmartcontractsCaller     // Read-only binding to the contract
+	SmartcontractsTransactor // Write-only binding to the contract
+	SmartcontractsFilterer   // Log filterer for contract events
+}
+
+// SmartcontractsCaller is an auto generated read-only Go binding around an Ethereum contract.
+type SmartcontractsCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type SmartcontractsFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type SmartcontractsSession struct {
+	Contract     *Smartcontracts   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type SmartcontractsCallerSession struct {
+	Contract *SmartcontractsCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// SmartcontractsTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type SmartcontractsTransactorSession struct {
+	Contract     *SmartcontractsTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsRaw is an auto generated low-level Go binding around an Ethereum contract.
+type SmartcontractsRaw struct {
+	Contract *Smartcontracts // Generic contract binding to access the raw methods on
+}
+
+// SmartcontractsCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type SmartcontractsCallerRaw struct {
+	Contract *SmartcontractsCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// SmartcontractsTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactorRaw struct {
+	Contract *SmartcontractsTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewSmartcontracts creates a new instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontracts(address common.Address, backend bind.ContractBackend) (*Smartcontracts, error) {
+	contract, err := bindSmartcontracts(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &Smartcontracts{SmartcontractsCaller: SmartcontractsCaller{contract: contract}, SmartcontractsTransactor: SmartcontractsTransactor{contract: contract}, SmartcontractsFilterer: SmartcontractsFilterer{contract: contract}}, nil
+}
+
+// NewSmartcontractsCaller creates a new read-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsCaller(address common.Address, caller bind.ContractCaller) (*SmartcontractsCaller, error) {
+	contract, err := bindSmartcontracts(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsCaller{contract: contract}, nil
+}
+
+// NewSmartcontractsTransactor creates a new write-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsTransactor(address common.Address, transactor bind.ContractTransactor) (*SmartcontractsTransactor, error) {
+	contract, err := bindSmartcontracts(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsTransactor{contract: contract}, nil
+}
+
+// NewSmartcontractsFilterer creates a new log filterer instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsFilterer(address common.Address, filterer bind.ContractFilterer) (*SmartcontractsFilterer, error) {
+	contract, err := bindSmartcontracts(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsFilterer{contract: contract}, nil
+}
+
+// bindSmartcontracts binds a generic wrapper to an already deployed contract.
+func bindSmartcontracts(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(SmartcontractsABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.SmartcontractsCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transact(opts, method, params...)
+}
+
+// CollectData is a paid mutator transaction binding the contract method 0x05187092.
+//
+// Solidity: function collectData(uint256 reqID, string data, address callbackAddress, bytes4 callbackMethodID) returns()
+func (_Smartcontracts *SmartcontractsTransactor) CollectData(opts *bind.TransactOpts, reqID *big.Int, data string, callbackAddress common.Address, callbackMethodID [4]byte) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "collectData", reqID, data, callbackAddress, callbackMethodID)
+}
+
+// CollectData is a paid mutator transaction binding the contract method 0x05187092.
+//
+// Solidity: function collectData(uint256 reqID, string data, address callbackAddress, bytes4 callbackMethodID) returns()
+func (_Smartcontracts *SmartcontractsSession) CollectData(reqID *big.Int, data string, callbackAddress common.Address, callbackMethodID [4]byte) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.CollectData(&_Smartcontracts.TransactOpts, reqID, data, callbackAddress, callbackMethodID)
+}
+
+// CollectData is a paid mutator transaction binding the contract method 0x05187092.
+//
+// Solidity: function collectData(uint256 reqID, string data, address callbackAddress, bytes4 callbackMethodID) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) CollectData(reqID *big.Int, data string, callbackAddress common.Address, callbackMethodID [4]byte) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.CollectData(&_Smartcontracts.TransactOpts, reqID, data, callbackAddress, callbackMethodID)
+}
diff --git a/contracts/Mediator.go b/contracts/Mediator.go
new file mode 100644
index 0000000..bc3332c
--- /dev/null
+++ b/contracts/Mediator.go
@@ -0,0 +1,573 @@
+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package contracts
+
+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"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// SmartcontractsABI is the input ABI used to generate the binding from.
+const SmartcontractsABI = "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_oracleEmitter\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_aggregator\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"reqID\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"string\",\"name\":\"data\",\"type\":\"string\"}],\"name\":\"DataReceived\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"reqID\",\"type\":\"uint256\"},{\"internalType\":\"string\",\"name\":\"data\",\"type\":\"string\"}],\"name\":\"_receiveDataCallback\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"isOwner\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"requestType\",\"type\":\"string\"}],\"name\":\"request\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// Smartcontracts is an auto generated Go binding around an Ethereum contract.
+type Smartcontracts struct {
+	SmartcontractsCaller     // Read-only binding to the contract
+	SmartcontractsTransactor // Write-only binding to the contract
+	SmartcontractsFilterer   // Log filterer for contract events
+}
+
+// SmartcontractsCaller is an auto generated read-only Go binding around an Ethereum contract.
+type SmartcontractsCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type SmartcontractsFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type SmartcontractsSession struct {
+	Contract     *Smartcontracts   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type SmartcontractsCallerSession struct {
+	Contract *SmartcontractsCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// SmartcontractsTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type SmartcontractsTransactorSession struct {
+	Contract     *SmartcontractsTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsRaw is an auto generated low-level Go binding around an Ethereum contract.
+type SmartcontractsRaw struct {
+	Contract *Smartcontracts // Generic contract binding to access the raw methods on
+}
+
+// SmartcontractsCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type SmartcontractsCallerRaw struct {
+	Contract *SmartcontractsCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// SmartcontractsTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactorRaw struct {
+	Contract *SmartcontractsTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewSmartcontracts creates a new instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontracts(address common.Address, backend bind.ContractBackend) (*Smartcontracts, error) {
+	contract, err := bindSmartcontracts(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &Smartcontracts{SmartcontractsCaller: SmartcontractsCaller{contract: contract}, SmartcontractsTransactor: SmartcontractsTransactor{contract: contract}, SmartcontractsFilterer: SmartcontractsFilterer{contract: contract}}, nil
+}
+
+// NewSmartcontractsCaller creates a new read-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsCaller(address common.Address, caller bind.ContractCaller) (*SmartcontractsCaller, error) {
+	contract, err := bindSmartcontracts(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsCaller{contract: contract}, nil
+}
+
+// NewSmartcontractsTransactor creates a new write-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsTransactor(address common.Address, transactor bind.ContractTransactor) (*SmartcontractsTransactor, error) {
+	contract, err := bindSmartcontracts(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsTransactor{contract: contract}, nil
+}
+
+// NewSmartcontractsFilterer creates a new log filterer instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsFilterer(address common.Address, filterer bind.ContractFilterer) (*SmartcontractsFilterer, error) {
+	contract, err := bindSmartcontracts(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsFilterer{contract: contract}, nil
+}
+
+// bindSmartcontracts binds a generic wrapper to an already deployed contract.
+func bindSmartcontracts(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(SmartcontractsABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.SmartcontractsCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transact(opts, method, params...)
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsCaller) IsOwner(opts *bind.CallOpts) (bool, error) {
+	var (
+		ret0 = new(bool)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "isOwner")
+	return *ret0, err
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsSession) IsOwner() (bool, error) {
+	return _Smartcontracts.Contract.IsOwner(&_Smartcontracts.CallOpts)
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsCallerSession) IsOwner() (bool, error) {
+	return _Smartcontracts.Contract.IsOwner(&_Smartcontracts.CallOpts)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsCaller) Owner(opts *bind.CallOpts) (common.Address, error) {
+	var (
+		ret0 = new(common.Address)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "owner")
+	return *ret0, err
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsSession) Owner() (common.Address, error) {
+	return _Smartcontracts.Contract.Owner(&_Smartcontracts.CallOpts)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsCallerSession) Owner() (common.Address, error) {
+	return _Smartcontracts.Contract.Owner(&_Smartcontracts.CallOpts)
+}
+
+// ReceiveDataCallback is a paid mutator transaction binding the contract method 0xfd55592a.
+//
+// Solidity: function _receiveDataCallback(uint256 reqID, string data) returns()
+func (_Smartcontracts *SmartcontractsTransactor) ReceiveDataCallback(opts *bind.TransactOpts, reqID *big.Int, data string) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "_receiveDataCallback", reqID, data)
+}
+
+// ReceiveDataCallback is a paid mutator transaction binding the contract method 0xfd55592a.
+//
+// Solidity: function _receiveDataCallback(uint256 reqID, string data) returns()
+func (_Smartcontracts *SmartcontractsSession) ReceiveDataCallback(reqID *big.Int, data string) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.ReceiveDataCallback(&_Smartcontracts.TransactOpts, reqID, data)
+}
+
+// ReceiveDataCallback is a paid mutator transaction binding the contract method 0xfd55592a.
+//
+// Solidity: function _receiveDataCallback(uint256 reqID, string data) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) ReceiveDataCallback(reqID *big.Int, data string) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.ReceiveDataCallback(&_Smartcontracts.TransactOpts, reqID, data)
+}
+
+// Request is a paid mutator transaction binding the contract method 0x2c199889.
+//
+// Solidity: function request(string requestType) returns(uint256)
+func (_Smartcontracts *SmartcontractsTransactor) Request(opts *bind.TransactOpts, requestType string) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "request", requestType)
+}
+
+// Request is a paid mutator transaction binding the contract method 0x2c199889.
+//
+// Solidity: function request(string requestType) returns(uint256)
+func (_Smartcontracts *SmartcontractsSession) Request(requestType string) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.Request(&_Smartcontracts.TransactOpts, requestType)
+}
+
+// Request is a paid mutator transaction binding the contract method 0x2c199889.
+//
+// Solidity: function request(string requestType) returns(uint256)
+func (_Smartcontracts *SmartcontractsTransactorSession) Request(requestType string) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.Request(&_Smartcontracts.TransactOpts, requestType)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsTransactor) TransferOwnership(opts *bind.TransactOpts, newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "transferOwnership", newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.TransferOwnership(&_Smartcontracts.TransactOpts, newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.TransferOwnership(&_Smartcontracts.TransactOpts, newOwner)
+}
+
+// SmartcontractsDataReceivedIterator is returned from FilterDataReceived and is used to iterate over the raw logs and unpacked data for DataReceived events raised by the Smartcontracts contract.
+type SmartcontractsDataReceivedIterator struct {
+	Event *SmartcontractsDataReceived // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *SmartcontractsDataReceivedIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(SmartcontractsDataReceived)
+			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
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(SmartcontractsDataReceived)
+		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()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *SmartcontractsDataReceivedIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *SmartcontractsDataReceivedIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// SmartcontractsDataReceived represents a DataReceived event raised by the Smartcontracts contract.
+type SmartcontractsDataReceived struct {
+	ReqID *big.Int
+	Data  string
+	Raw   types.Log // Blockchain specific contextual infos
+}
+
+// FilterDataReceived is a free log retrieval operation binding the contract event 0x761d45cf346740607c4bed1616ffece636d5449d76d1213886d4a76b76318653.
+//
+// Solidity: event DataReceived(uint256 reqID, string data)
+func (_Smartcontracts *SmartcontractsFilterer) FilterDataReceived(opts *bind.FilterOpts) (*SmartcontractsDataReceivedIterator, error) {
+
+	logs, sub, err := _Smartcontracts.contract.FilterLogs(opts, "DataReceived")
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsDataReceivedIterator{contract: _Smartcontracts.contract, event: "DataReceived", logs: logs, sub: sub}, nil
+}
+
+// WatchDataReceived is a free log subscription operation binding the contract event 0x761d45cf346740607c4bed1616ffece636d5449d76d1213886d4a76b76318653.
+//
+// Solidity: event DataReceived(uint256 reqID, string data)
+func (_Smartcontracts *SmartcontractsFilterer) WatchDataReceived(opts *bind.WatchOpts, sink chan<- *SmartcontractsDataReceived) (event.Subscription, error) {
+
+	logs, sub, err := _Smartcontracts.contract.WatchLogs(opts, "DataReceived")
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(SmartcontractsDataReceived)
+				if err := _Smartcontracts.contract.UnpackLog(event, "DataReceived", 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
+}
+
+// ParseDataReceived is a log parse operation binding the contract event 0x761d45cf346740607c4bed1616ffece636d5449d76d1213886d4a76b76318653.
+//
+// Solidity: event DataReceived(uint256 reqID, string data)
+func (_Smartcontracts *SmartcontractsFilterer) ParseDataReceived(log types.Log) (*SmartcontractsDataReceived, error) {
+	event := new(SmartcontractsDataReceived)
+	if err := _Smartcontracts.contract.UnpackLog(event, "DataReceived", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
+
+// SmartcontractsOwnershipTransferredIterator is returned from FilterOwnershipTransferred and is used to iterate over the raw logs and unpacked data for OwnershipTransferred events raised by the Smartcontracts contract.
+type SmartcontractsOwnershipTransferredIterator struct {
+	Event *SmartcontractsOwnershipTransferred // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *SmartcontractsOwnershipTransferredIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(SmartcontractsOwnershipTransferred)
+			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
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(SmartcontractsOwnershipTransferred)
+		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()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *SmartcontractsOwnershipTransferredIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *SmartcontractsOwnershipTransferredIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// SmartcontractsOwnershipTransferred represents a OwnershipTransferred event raised by the Smartcontracts contract.
+type SmartcontractsOwnershipTransferred struct {
+	PreviousOwner common.Address
+	NewOwner      common.Address
+	Raw           types.Log // Blockchain specific contextual infos
+}
+
+// FilterOwnershipTransferred is a free log retrieval operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) FilterOwnershipTransferred(opts *bind.FilterOpts, previousOwner []common.Address, newOwner []common.Address) (*SmartcontractsOwnershipTransferredIterator, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _Smartcontracts.contract.FilterLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsOwnershipTransferredIterator{contract: _Smartcontracts.contract, event: "OwnershipTransferred", logs: logs, sub: sub}, nil
+}
+
+// WatchOwnershipTransferred is a free log subscription operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) WatchOwnershipTransferred(opts *bind.WatchOpts, sink chan<- *SmartcontractsOwnershipTransferred, previousOwner []common.Address, newOwner []common.Address) (event.Subscription, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _Smartcontracts.contract.WatchLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(SmartcontractsOwnershipTransferred)
+				if err := _Smartcontracts.contract.UnpackLog(event, "OwnershipTransferred", 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
+}
+
+// ParseOwnershipTransferred is a log parse operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) ParseOwnershipTransferred(log types.Log) (*SmartcontractsOwnershipTransferred, error) {
+	event := new(SmartcontractsOwnershipTransferred)
+	if err := _Smartcontracts.contract.UnpackLog(event, "OwnershipTransferred", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
diff --git a/contracts/OracleEmitter.go b/contracts/OracleEmitter.go
new file mode 100644
index 0000000..5af7ac3
--- /dev/null
+++ b/contracts/OracleEmitter.go
@@ -0,0 +1,329 @@
+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package contracts
+
+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"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// SmartcontractsABI is the input ABI used to generate the binding from.
+const SmartcontractsABI = "[{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"string\",\"name\":\"requestType\",\"type\":\"string\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"callbackAddress\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bytes4\",\"name\":\"callbackMethodID\",\"type\":\"bytes4\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"requestID\",\"type\":\"uint256\"}],\"name\":\"NewOracleRequest\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"requestType\",\"type\":\"string\"},{\"internalType\":\"address\",\"name\":\"callbackAddress\",\"type\":\"address\"},{\"internalType\":\"bytes4\",\"name\":\"callbackMethodID\",\"type\":\"bytes4\"}],\"name\":\"requestOracles\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// Smartcontracts is an auto generated Go binding around an Ethereum contract.
+type Smartcontracts struct {
+	SmartcontractsCaller     // Read-only binding to the contract
+	SmartcontractsTransactor // Write-only binding to the contract
+	SmartcontractsFilterer   // Log filterer for contract events
+}
+
+// SmartcontractsCaller is an auto generated read-only Go binding around an Ethereum contract.
+type SmartcontractsCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type SmartcontractsFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type SmartcontractsSession struct {
+	Contract     *Smartcontracts   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type SmartcontractsCallerSession struct {
+	Contract *SmartcontractsCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// SmartcontractsTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type SmartcontractsTransactorSession struct {
+	Contract     *SmartcontractsTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsRaw is an auto generated low-level Go binding around an Ethereum contract.
+type SmartcontractsRaw struct {
+	Contract *Smartcontracts // Generic contract binding to access the raw methods on
+}
+
+// SmartcontractsCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type SmartcontractsCallerRaw struct {
+	Contract *SmartcontractsCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// SmartcontractsTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactorRaw struct {
+	Contract *SmartcontractsTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewSmartcontracts creates a new instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontracts(address common.Address, backend bind.ContractBackend) (*Smartcontracts, error) {
+	contract, err := bindSmartcontracts(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &Smartcontracts{SmartcontractsCaller: SmartcontractsCaller{contract: contract}, SmartcontractsTransactor: SmartcontractsTransactor{contract: contract}, SmartcontractsFilterer: SmartcontractsFilterer{contract: contract}}, nil
+}
+
+// NewSmartcontractsCaller creates a new read-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsCaller(address common.Address, caller bind.ContractCaller) (*SmartcontractsCaller, error) {
+	contract, err := bindSmartcontracts(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsCaller{contract: contract}, nil
+}
+
+// NewSmartcontractsTransactor creates a new write-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsTransactor(address common.Address, transactor bind.ContractTransactor) (*SmartcontractsTransactor, error) {
+	contract, err := bindSmartcontracts(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsTransactor{contract: contract}, nil
+}
+
+// NewSmartcontractsFilterer creates a new log filterer instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsFilterer(address common.Address, filterer bind.ContractFilterer) (*SmartcontractsFilterer, error) {
+	contract, err := bindSmartcontracts(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsFilterer{contract: contract}, nil
+}
+
+// bindSmartcontracts binds a generic wrapper to an already deployed contract.
+func bindSmartcontracts(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(SmartcontractsABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.SmartcontractsCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transact(opts, method, params...)
+}
+
+// RequestOracles is a paid mutator transaction binding the contract method 0xcae2f480.
+//
+// Solidity: function requestOracles(string requestType, address callbackAddress, bytes4 callbackMethodID) returns(uint256)
+func (_Smartcontracts *SmartcontractsTransactor) RequestOracles(opts *bind.TransactOpts, requestType string, callbackAddress common.Address, callbackMethodID [4]byte) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "requestOracles", requestType, callbackAddress, callbackMethodID)
+}
+
+// RequestOracles is a paid mutator transaction binding the contract method 0xcae2f480.
+//
+// Solidity: function requestOracles(string requestType, address callbackAddress, bytes4 callbackMethodID) returns(uint256)
+func (_Smartcontracts *SmartcontractsSession) RequestOracles(requestType string, callbackAddress common.Address, callbackMethodID [4]byte) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.RequestOracles(&_Smartcontracts.TransactOpts, requestType, callbackAddress, callbackMethodID)
+}
+
+// RequestOracles is a paid mutator transaction binding the contract method 0xcae2f480.
+//
+// Solidity: function requestOracles(string requestType, address callbackAddress, bytes4 callbackMethodID) returns(uint256)
+func (_Smartcontracts *SmartcontractsTransactorSession) RequestOracles(requestType string, callbackAddress common.Address, callbackMethodID [4]byte) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.RequestOracles(&_Smartcontracts.TransactOpts, requestType, callbackAddress, callbackMethodID)
+}
+
+// SmartcontractsNewOracleRequestIterator is returned from FilterNewOracleRequest and is used to iterate over the raw logs and unpacked data for NewOracleRequest events raised by the Smartcontracts contract.
+type SmartcontractsNewOracleRequestIterator struct {
+	Event *SmartcontractsNewOracleRequest // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *SmartcontractsNewOracleRequestIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(SmartcontractsNewOracleRequest)
+			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
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(SmartcontractsNewOracleRequest)
+		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()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *SmartcontractsNewOracleRequestIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *SmartcontractsNewOracleRequestIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// SmartcontractsNewOracleRequest represents a NewOracleRequest event raised by the Smartcontracts contract.
+type SmartcontractsNewOracleRequest struct {
+	RequestType      string
+	CallbackAddress  common.Address
+	CallbackMethodID [4]byte
+	RequestID        *big.Int
+	Raw              types.Log // Blockchain specific contextual infos
+}
+
+// FilterNewOracleRequest is a free log retrieval operation binding the contract event 0xc1a7df69ed0404441720a3eb710f322985ecbbe4f31934587bee703efe04427a.
+//
+// Solidity: event NewOracleRequest(string requestType, address callbackAddress, bytes4 callbackMethodID, uint256 requestID)
+func (_Smartcontracts *SmartcontractsFilterer) FilterNewOracleRequest(opts *bind.FilterOpts) (*SmartcontractsNewOracleRequestIterator, error) {
+
+	logs, sub, err := _Smartcontracts.contract.FilterLogs(opts, "NewOracleRequest")
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsNewOracleRequestIterator{contract: _Smartcontracts.contract, event: "NewOracleRequest", logs: logs, sub: sub}, nil
+}
+
+// WatchNewOracleRequest is a free log subscription operation binding the contract event 0xc1a7df69ed0404441720a3eb710f322985ecbbe4f31934587bee703efe04427a.
+//
+// Solidity: event NewOracleRequest(string requestType, address callbackAddress, bytes4 callbackMethodID, uint256 requestID)
+func (_Smartcontracts *SmartcontractsFilterer) WatchNewOracleRequest(opts *bind.WatchOpts, sink chan<- *SmartcontractsNewOracleRequest) (event.Subscription, error) {
+
+	logs, sub, err := _Smartcontracts.contract.WatchLogs(opts, "NewOracleRequest")
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(SmartcontractsNewOracleRequest)
+				if err := _Smartcontracts.contract.UnpackLog(event, "NewOracleRequest", 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
+}
+
+// ParseNewOracleRequest is a log parse operation binding the contract event 0xc1a7df69ed0404441720a3eb710f322985ecbbe4f31934587bee703efe04427a.
+//
+// Solidity: event NewOracleRequest(string requestType, address callbackAddress, bytes4 callbackMethodID, uint256 requestID)
+func (_Smartcontracts *SmartcontractsFilterer) ParseNewOracleRequest(log types.Log) (*SmartcontractsNewOracleRequest, error) {
+	event := new(SmartcontractsNewOracleRequest)
+	if err := _Smartcontracts.contract.UnpackLog(event, "NewOracleRequest", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
diff --git a/contracts/Ownable.go b/contracts/Ownable.go
new file mode 100644
index 0000000..0872446
--- /dev/null
+++ b/contracts/Ownable.go
@@ -0,0 +1,397 @@
+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package contracts
+
+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"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// SmartcontractsABI is the input ABI used to generate the binding from.
+const SmartcontractsABI = "[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"isOwner\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// Smartcontracts is an auto generated Go binding around an Ethereum contract.
+type Smartcontracts struct {
+	SmartcontractsCaller     // Read-only binding to the contract
+	SmartcontractsTransactor // Write-only binding to the contract
+	SmartcontractsFilterer   // Log filterer for contract events
+}
+
+// SmartcontractsCaller is an auto generated read-only Go binding around an Ethereum contract.
+type SmartcontractsCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type SmartcontractsFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type SmartcontractsSession struct {
+	Contract     *Smartcontracts   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type SmartcontractsCallerSession struct {
+	Contract *SmartcontractsCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// SmartcontractsTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type SmartcontractsTransactorSession struct {
+	Contract     *SmartcontractsTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsRaw is an auto generated low-level Go binding around an Ethereum contract.
+type SmartcontractsRaw struct {
+	Contract *Smartcontracts // Generic contract binding to access the raw methods on
+}
+
+// SmartcontractsCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type SmartcontractsCallerRaw struct {
+	Contract *SmartcontractsCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// SmartcontractsTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactorRaw struct {
+	Contract *SmartcontractsTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewSmartcontracts creates a new instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontracts(address common.Address, backend bind.ContractBackend) (*Smartcontracts, error) {
+	contract, err := bindSmartcontracts(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &Smartcontracts{SmartcontractsCaller: SmartcontractsCaller{contract: contract}, SmartcontractsTransactor: SmartcontractsTransactor{contract: contract}, SmartcontractsFilterer: SmartcontractsFilterer{contract: contract}}, nil
+}
+
+// NewSmartcontractsCaller creates a new read-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsCaller(address common.Address, caller bind.ContractCaller) (*SmartcontractsCaller, error) {
+	contract, err := bindSmartcontracts(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsCaller{contract: contract}, nil
+}
+
+// NewSmartcontractsTransactor creates a new write-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsTransactor(address common.Address, transactor bind.ContractTransactor) (*SmartcontractsTransactor, error) {
+	contract, err := bindSmartcontracts(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsTransactor{contract: contract}, nil
+}
+
+// NewSmartcontractsFilterer creates a new log filterer instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsFilterer(address common.Address, filterer bind.ContractFilterer) (*SmartcontractsFilterer, error) {
+	contract, err := bindSmartcontracts(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsFilterer{contract: contract}, nil
+}
+
+// bindSmartcontracts binds a generic wrapper to an already deployed contract.
+func bindSmartcontracts(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(SmartcontractsABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.SmartcontractsCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transact(opts, method, params...)
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsCaller) IsOwner(opts *bind.CallOpts) (bool, error) {
+	var (
+		ret0 = new(bool)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "isOwner")
+	return *ret0, err
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsSession) IsOwner() (bool, error) {
+	return _Smartcontracts.Contract.IsOwner(&_Smartcontracts.CallOpts)
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsCallerSession) IsOwner() (bool, error) {
+	return _Smartcontracts.Contract.IsOwner(&_Smartcontracts.CallOpts)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsCaller) Owner(opts *bind.CallOpts) (common.Address, error) {
+	var (
+		ret0 = new(common.Address)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "owner")
+	return *ret0, err
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsSession) Owner() (common.Address, error) {
+	return _Smartcontracts.Contract.Owner(&_Smartcontracts.CallOpts)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsCallerSession) Owner() (common.Address, error) {
+	return _Smartcontracts.Contract.Owner(&_Smartcontracts.CallOpts)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsTransactor) TransferOwnership(opts *bind.TransactOpts, newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "transferOwnership", newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.TransferOwnership(&_Smartcontracts.TransactOpts, newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.TransferOwnership(&_Smartcontracts.TransactOpts, newOwner)
+}
+
+// SmartcontractsOwnershipTransferredIterator is returned from FilterOwnershipTransferred and is used to iterate over the raw logs and unpacked data for OwnershipTransferred events raised by the Smartcontracts contract.
+type SmartcontractsOwnershipTransferredIterator struct {
+	Event *SmartcontractsOwnershipTransferred // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *SmartcontractsOwnershipTransferredIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(SmartcontractsOwnershipTransferred)
+			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
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(SmartcontractsOwnershipTransferred)
+		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()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *SmartcontractsOwnershipTransferredIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *SmartcontractsOwnershipTransferredIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// SmartcontractsOwnershipTransferred represents a OwnershipTransferred event raised by the Smartcontracts contract.
+type SmartcontractsOwnershipTransferred struct {
+	PreviousOwner common.Address
+	NewOwner      common.Address
+	Raw           types.Log // Blockchain specific contextual infos
+}
+
+// FilterOwnershipTransferred is a free log retrieval operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) FilterOwnershipTransferred(opts *bind.FilterOpts, previousOwner []common.Address, newOwner []common.Address) (*SmartcontractsOwnershipTransferredIterator, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _Smartcontracts.contract.FilterLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsOwnershipTransferredIterator{contract: _Smartcontracts.contract, event: "OwnershipTransferred", logs: logs, sub: sub}, nil
+}
+
+// WatchOwnershipTransferred is a free log subscription operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) WatchOwnershipTransferred(opts *bind.WatchOpts, sink chan<- *SmartcontractsOwnershipTransferred, previousOwner []common.Address, newOwner []common.Address) (event.Subscription, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _Smartcontracts.contract.WatchLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(SmartcontractsOwnershipTransferred)
+				if err := _Smartcontracts.contract.UnpackLog(event, "OwnershipTransferred", 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
+}
+
+// ParseOwnershipTransferred is a log parse operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) ParseOwnershipTransferred(log types.Log) (*SmartcontractsOwnershipTransferred, error) {
+	event := new(SmartcontractsOwnershipTransferred)
+	if err := _Smartcontracts.contract.UnpackLog(event, "OwnershipTransferred", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
diff --git a/contracts/Whitelist.go b/contracts/Whitelist.go
new file mode 100644
index 0000000..afb0aeb
--- /dev/null
+++ b/contracts/Whitelist.go
@@ -0,0 +1,491 @@
+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package contracts
+
+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"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// SmartcontractsABI is the input ABI used to generate the binding from.
+const SmartcontractsABI = "[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"nodeAccount\",\"type\":\"address\"}],\"name\":\"addNode\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getNodes\",\"outputs\":[{\"internalType\":\"address[]\",\"name\":\"\",\"type\":\"address[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"isOwner\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"nodes\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"nodeAccount\",\"type\":\"address\"}],\"name\":\"removeNode\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// Smartcontracts is an auto generated Go binding around an Ethereum contract.
+type Smartcontracts struct {
+	SmartcontractsCaller     // Read-only binding to the contract
+	SmartcontractsTransactor // Write-only binding to the contract
+	SmartcontractsFilterer   // Log filterer for contract events
+}
+
+// SmartcontractsCaller is an auto generated read-only Go binding around an Ethereum contract.
+type SmartcontractsCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type SmartcontractsFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// SmartcontractsSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type SmartcontractsSession struct {
+	Contract     *Smartcontracts   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type SmartcontractsCallerSession struct {
+	Contract *SmartcontractsCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// SmartcontractsTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type SmartcontractsTransactorSession struct {
+	Contract     *SmartcontractsTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// SmartcontractsRaw is an auto generated low-level Go binding around an Ethereum contract.
+type SmartcontractsRaw struct {
+	Contract *Smartcontracts // Generic contract binding to access the raw methods on
+}
+
+// SmartcontractsCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type SmartcontractsCallerRaw struct {
+	Contract *SmartcontractsCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// SmartcontractsTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type SmartcontractsTransactorRaw struct {
+	Contract *SmartcontractsTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewSmartcontracts creates a new instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontracts(address common.Address, backend bind.ContractBackend) (*Smartcontracts, error) {
+	contract, err := bindSmartcontracts(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &Smartcontracts{SmartcontractsCaller: SmartcontractsCaller{contract: contract}, SmartcontractsTransactor: SmartcontractsTransactor{contract: contract}, SmartcontractsFilterer: SmartcontractsFilterer{contract: contract}}, nil
+}
+
+// NewSmartcontractsCaller creates a new read-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsCaller(address common.Address, caller bind.ContractCaller) (*SmartcontractsCaller, error) {
+	contract, err := bindSmartcontracts(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsCaller{contract: contract}, nil
+}
+
+// NewSmartcontractsTransactor creates a new write-only instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsTransactor(address common.Address, transactor bind.ContractTransactor) (*SmartcontractsTransactor, error) {
+	contract, err := bindSmartcontracts(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsTransactor{contract: contract}, nil
+}
+
+// NewSmartcontractsFilterer creates a new log filterer instance of Smartcontracts, bound to a specific deployed contract.
+func NewSmartcontractsFilterer(address common.Address, filterer bind.ContractFilterer) (*SmartcontractsFilterer, error) {
+	contract, err := bindSmartcontracts(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsFilterer{contract: contract}, nil
+}
+
+// bindSmartcontracts binds a generic wrapper to an already deployed contract.
+func bindSmartcontracts(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(SmartcontractsABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.SmartcontractsCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.SmartcontractsTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_Smartcontracts *SmartcontractsCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
+	return _Smartcontracts.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_Smartcontracts *SmartcontractsTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.contract.Transact(opts, method, params...)
+}
+
+// GetNodes is a free data retrieval call binding the contract method 0xe29581aa.
+//
+// Solidity: function getNodes() view returns(address[])
+func (_Smartcontracts *SmartcontractsCaller) GetNodes(opts *bind.CallOpts) ([]common.Address, error) {
+	var (
+		ret0 = new([]common.Address)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "getNodes")
+	return *ret0, err
+}
+
+// GetNodes is a free data retrieval call binding the contract method 0xe29581aa.
+//
+// Solidity: function getNodes() view returns(address[])
+func (_Smartcontracts *SmartcontractsSession) GetNodes() ([]common.Address, error) {
+	return _Smartcontracts.Contract.GetNodes(&_Smartcontracts.CallOpts)
+}
+
+// GetNodes is a free data retrieval call binding the contract method 0xe29581aa.
+//
+// Solidity: function getNodes() view returns(address[])
+func (_Smartcontracts *SmartcontractsCallerSession) GetNodes() ([]common.Address, error) {
+	return _Smartcontracts.Contract.GetNodes(&_Smartcontracts.CallOpts)
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsCaller) IsOwner(opts *bind.CallOpts) (bool, error) {
+	var (
+		ret0 = new(bool)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "isOwner")
+	return *ret0, err
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsSession) IsOwner() (bool, error) {
+	return _Smartcontracts.Contract.IsOwner(&_Smartcontracts.CallOpts)
+}
+
+// IsOwner is a free data retrieval call binding the contract method 0x8f32d59b.
+//
+// Solidity: function isOwner() view returns(bool)
+func (_Smartcontracts *SmartcontractsCallerSession) IsOwner() (bool, error) {
+	return _Smartcontracts.Contract.IsOwner(&_Smartcontracts.CallOpts)
+}
+
+// Nodes is a free data retrieval call binding the contract method 0x1c53c280.
+//
+// Solidity: function nodes(uint256 ) view returns(address)
+func (_Smartcontracts *SmartcontractsCaller) Nodes(opts *bind.CallOpts, arg0 *big.Int) (common.Address, error) {
+	var (
+		ret0 = new(common.Address)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "nodes", arg0)
+	return *ret0, err
+}
+
+// Nodes is a free data retrieval call binding the contract method 0x1c53c280.
+//
+// Solidity: function nodes(uint256 ) view returns(address)
+func (_Smartcontracts *SmartcontractsSession) Nodes(arg0 *big.Int) (common.Address, error) {
+	return _Smartcontracts.Contract.Nodes(&_Smartcontracts.CallOpts, arg0)
+}
+
+// Nodes is a free data retrieval call binding the contract method 0x1c53c280.
+//
+// Solidity: function nodes(uint256 ) view returns(address)
+func (_Smartcontracts *SmartcontractsCallerSession) Nodes(arg0 *big.Int) (common.Address, error) {
+	return _Smartcontracts.Contract.Nodes(&_Smartcontracts.CallOpts, arg0)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsCaller) Owner(opts *bind.CallOpts) (common.Address, error) {
+	var (
+		ret0 = new(common.Address)
+	)
+	out := ret0
+	err := _Smartcontracts.contract.Call(opts, out, "owner")
+	return *ret0, err
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsSession) Owner() (common.Address, error) {
+	return _Smartcontracts.Contract.Owner(&_Smartcontracts.CallOpts)
+}
+
+// Owner is a free data retrieval call binding the contract method 0x8da5cb5b.
+//
+// Solidity: function owner() view returns(address)
+func (_Smartcontracts *SmartcontractsCallerSession) Owner() (common.Address, error) {
+	return _Smartcontracts.Contract.Owner(&_Smartcontracts.CallOpts)
+}
+
+// AddNode is a paid mutator transaction binding the contract method 0x9d95f1cc.
+//
+// Solidity: function addNode(address nodeAccount) returns()
+func (_Smartcontracts *SmartcontractsTransactor) AddNode(opts *bind.TransactOpts, nodeAccount common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "addNode", nodeAccount)
+}
+
+// AddNode is a paid mutator transaction binding the contract method 0x9d95f1cc.
+//
+// Solidity: function addNode(address nodeAccount) returns()
+func (_Smartcontracts *SmartcontractsSession) AddNode(nodeAccount common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.AddNode(&_Smartcontracts.TransactOpts, nodeAccount)
+}
+
+// AddNode is a paid mutator transaction binding the contract method 0x9d95f1cc.
+//
+// Solidity: function addNode(address nodeAccount) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) AddNode(nodeAccount common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.AddNode(&_Smartcontracts.TransactOpts, nodeAccount)
+}
+
+// RemoveNode is a paid mutator transaction binding the contract method 0xb2b99ec9.
+//
+// Solidity: function removeNode(address nodeAccount) returns()
+func (_Smartcontracts *SmartcontractsTransactor) RemoveNode(opts *bind.TransactOpts, nodeAccount common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "removeNode", nodeAccount)
+}
+
+// RemoveNode is a paid mutator transaction binding the contract method 0xb2b99ec9.
+//
+// Solidity: function removeNode(address nodeAccount) returns()
+func (_Smartcontracts *SmartcontractsSession) RemoveNode(nodeAccount common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.RemoveNode(&_Smartcontracts.TransactOpts, nodeAccount)
+}
+
+// RemoveNode is a paid mutator transaction binding the contract method 0xb2b99ec9.
+//
+// Solidity: function removeNode(address nodeAccount) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) RemoveNode(nodeAccount common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.RemoveNode(&_Smartcontracts.TransactOpts, nodeAccount)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsTransactor) TransferOwnership(opts *bind.TransactOpts, newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.contract.Transact(opts, "transferOwnership", newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.TransferOwnership(&_Smartcontracts.TransactOpts, newOwner)
+}
+
+// TransferOwnership is a paid mutator transaction binding the contract method 0xf2fde38b.
+//
+// Solidity: function transferOwnership(address newOwner) returns()
+func (_Smartcontracts *SmartcontractsTransactorSession) TransferOwnership(newOwner common.Address) (*types.Transaction, error) {
+	return _Smartcontracts.Contract.TransferOwnership(&_Smartcontracts.TransactOpts, newOwner)
+}
+
+// SmartcontractsOwnershipTransferredIterator is returned from FilterOwnershipTransferred and is used to iterate over the raw logs and unpacked data for OwnershipTransferred events raised by the Smartcontracts contract.
+type SmartcontractsOwnershipTransferredIterator struct {
+	Event *SmartcontractsOwnershipTransferred // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *SmartcontractsOwnershipTransferredIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(SmartcontractsOwnershipTransferred)
+			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
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(SmartcontractsOwnershipTransferred)
+		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()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *SmartcontractsOwnershipTransferredIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *SmartcontractsOwnershipTransferredIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// SmartcontractsOwnershipTransferred represents a OwnershipTransferred event raised by the Smartcontracts contract.
+type SmartcontractsOwnershipTransferred struct {
+	PreviousOwner common.Address
+	NewOwner      common.Address
+	Raw           types.Log // Blockchain specific contextual infos
+}
+
+// FilterOwnershipTransferred is a free log retrieval operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) FilterOwnershipTransferred(opts *bind.FilterOpts, previousOwner []common.Address, newOwner []common.Address) (*SmartcontractsOwnershipTransferredIterator, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _Smartcontracts.contract.FilterLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return &SmartcontractsOwnershipTransferredIterator{contract: _Smartcontracts.contract, event: "OwnershipTransferred", logs: logs, sub: sub}, nil
+}
+
+// WatchOwnershipTransferred is a free log subscription operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) WatchOwnershipTransferred(opts *bind.WatchOpts, sink chan<- *SmartcontractsOwnershipTransferred, previousOwner []common.Address, newOwner []common.Address) (event.Subscription, error) {
+
+	var previousOwnerRule []interface{}
+	for _, previousOwnerItem := range previousOwner {
+		previousOwnerRule = append(previousOwnerRule, previousOwnerItem)
+	}
+	var newOwnerRule []interface{}
+	for _, newOwnerItem := range newOwner {
+		newOwnerRule = append(newOwnerRule, newOwnerItem)
+	}
+
+	logs, sub, err := _Smartcontracts.contract.WatchLogs(opts, "OwnershipTransferred", previousOwnerRule, newOwnerRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(SmartcontractsOwnershipTransferred)
+				if err := _Smartcontracts.contract.UnpackLog(event, "OwnershipTransferred", 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
+}
+
+// ParseOwnershipTransferred is a log parse operation binding the contract event 0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0.
+//
+// Solidity: event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
+func (_Smartcontracts *SmartcontractsFilterer) ParseOwnershipTransferred(log types.Log) (*SmartcontractsOwnershipTransferred, error) {
+	event := new(SmartcontractsOwnershipTransferred)
+	if err := _Smartcontracts.contract.UnpackLog(event, "OwnershipTransferred", log); err != nil {
+		return nil, err
+	}
+	return event, nil
+}
diff --git a/eth-contracts/.env-sample b/eth-contracts/.env-sample
new file mode 100644
index 0000000..026e4e6
--- /dev/null
+++ b/eth-contracts/.env-sample
@@ -0,0 +1,6 @@
+# Ropsten
+WEB3_NETWORK_ID=3
+WEB3_INFURA_ID=please provide
+MNEMONIC=please provide
+ACCOUNT_ADDR=please provide
+PRIVATE_KEY=please provie
diff --git a/eth-contracts/README.md b/eth-contracts/README.md
new file mode 100644
index 0000000..2156b89
--- /dev/null
+++ b/eth-contracts/README.md
@@ -0,0 +1,3 @@
+# P2P Oracle Smart Contracts
+
+Smart contracts to work with Secured Finance P2P oracle network.
diff --git a/eth-contracts/build/Aggregator.abi b/eth-contracts/build/Aggregator.abi
new file mode 100644
index 0000000..bdb4429
--- /dev/null
+++ b/eth-contracts/build/Aggregator.abi
@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"contract Whitelist","name":"_whitelist","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"uint256","name":"reqID","type":"uint256"},{"internalType":"string","name":"data","type":"string"},{"internalType":"address","name":"callbackAddress","type":"address"},{"internalType":"bytes4","name":"callbackMethodID","type":"bytes4"}],"name":"collectData","outputs":[],"stateMutability":"nonpayable","type":"function"}]
\ No newline at end of file
diff --git a/eth-contracts/build/Mediator.abi b/eth-contracts/build/Mediator.abi
new file mode 100644
index 0000000..7abe973
--- /dev/null
+++ b/eth-contracts/build/Mediator.abi
@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"address","name":"_oracleEmitter","type":"address"},{"internalType":"address","name":"_aggregator","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"reqID","type":"uint256"},{"indexed":false,"internalType":"string","name":"data","type":"string"}],"name":"DataReceived","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"uint256","name":"reqID","type":"uint256"},{"internalType":"string","name":"data","type":"string"}],"name":"_receiveDataCallback","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"requestType","type":"string"}],"name":"request","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
\ No newline at end of file
diff --git a/eth-contracts/build/OracleEmitter.abi b/eth-contracts/build/OracleEmitter.abi
new file mode 100644
index 0000000..2dd330a
--- /dev/null
+++ b/eth-contracts/build/OracleEmitter.abi
@@ -0,0 +1 @@
+[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"requestType","type":"string"},{"indexed":false,"internalType":"address","name":"callbackAddress","type":"address"},{"indexed":false,"internalType":"bytes4","name":"callbackMethodID","type":"bytes4"},{"indexed":false,"internalType":"uint256","name":"requestID","type":"uint256"}],"name":"NewOracleRequest","type":"event"},{"inputs":[{"internalType":"string","name":"requestType","type":"string"},{"internalType":"address","name":"callbackAddress","type":"address"},{"internalType":"bytes4","name":"callbackMethodID","type":"bytes4"}],"name":"requestOracles","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]
\ No newline at end of file
diff --git a/eth-contracts/build/Ownable.abi b/eth-contracts/build/Ownable.abi
new file mode 100644
index 0000000..f7e62d2
--- /dev/null
+++ b/eth-contracts/build/Ownable.abi
@@ -0,0 +1 @@
+[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
\ No newline at end of file
diff --git a/eth-contracts/build/Whitelist.abi b/eth-contracts/build/Whitelist.abi
new file mode 100644
index 0000000..3742564
--- /dev/null
+++ b/eth-contracts/build/Whitelist.abi
@@ -0,0 +1 @@
+[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"address","name":"nodeAccount","type":"address"}],"name":"addNode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getNodes","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"nodes","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"nodeAccount","type":"address"}],"name":"removeNode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
\ No newline at end of file
diff --git a/eth-contracts/contracts/Aggregator.sol b/eth-contracts/contracts/Aggregator.sol
new file mode 100644
index 0000000..952681a
--- /dev/null
+++ b/eth-contracts/contracts/Aggregator.sol
@@ -0,0 +1,25 @@
+//SPDX-License-Identifier: MIT
+pragma solidity >= 0.5.0 < 0.7.0;
+
+import "./Whitelist.sol";
+
+contract Aggregator {
+  Whitelist whitelist;
+
+  constructor(Whitelist _whitelist) public {
+    whitelist = _whitelist;
+  }
+
+  function collectData(uint256 reqID, string memory data, address callbackAddress, bytes4 callbackMethodID) public {
+    address[] memory nodes = whitelist.getNodes();
+    bool nodeInTheList = false;
+    for (uint256 i = 0; i < nodes.length-1; i++) {
+      if (nodes[i] == msg.sender) {
+        nodeInTheList = true;
+      }
+    }
+    require(nodeInTheList);
+    (bool success,) = callbackAddress.call(abi.encode(callbackMethodID, reqID, data));
+    require(success);
+  }
+}
diff --git a/eth-contracts/contracts/Mediator.sol b/eth-contracts/contracts/Mediator.sol
new file mode 100644
index 0000000..dee3819
--- /dev/null
+++ b/eth-contracts/contracts/Mediator.sol
@@ -0,0 +1,29 @@
+//SPDX-License-Identifier: MIT
+pragma solidity >= 0.5.0 < 0.7.0;
+
+import "./vendor/Ownable.sol";
+import "./OracleEmitter.sol";
+
+contract Mediator is Ownable {
+  event DataReceived(
+    uint256 reqID,
+    string data
+  );
+
+  OracleEmitter oracleEmitter;
+  address aggregator;
+
+  constructor(address _oracleEmitter, address _aggregator) public Ownable() {
+    oracleEmitter = OracleEmitter(_oracleEmitter);
+    aggregator = _aggregator;
+  }
+
+  function request(string memory requestType) public returns (uint256) {
+    return oracleEmitter.requestOracles(requestType, address(this), bytes4(keccak256("_receiveDataCallback(uint256, string)")));
+  }
+
+  function _receiveDataCallback(uint256 reqID, string memory data) public {
+    require(msg.sender == aggregator);
+    emit DataReceived(reqID, data);
+  }
+}
diff --git a/eth-contracts/contracts/OracleEmitter.sol b/eth-contracts/contracts/OracleEmitter.sol
new file mode 100644
index 0000000..d3acc97
--- /dev/null
+++ b/eth-contracts/contracts/OracleEmitter.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.4.21 <0.7.0;
+
+contract OracleEmitter {
+  uint256 requestCounter;
+
+  event NewOracleRequest(
+    string requestType,
+    address callbackAddress,
+    bytes4 callbackMethodID,
+    uint256 requestID
+  );
+
+  function requestOracles(string memory requestType, address callbackAddress, bytes4 callbackMethodID) public returns (uint256) {
+    requestCounter++;
+    emit NewOracleRequest(requestType, callbackAddress, callbackMethodID, requestCounter);
+    return requestCounter;
+  }
+}
diff --git a/eth-contracts/contracts/Whitelist.sol b/eth-contracts/contracts/Whitelist.sol
new file mode 100644
index 0000000..4987317
--- /dev/null
+++ b/eth-contracts/contracts/Whitelist.sol
@@ -0,0 +1,34 @@
+//SPDX-License-Identifier: MIT
+pragma solidity >= 0.5.0 < 0.7.0;
+
+import "./vendor/Ownable.sol";
+
+contract Whitelist is Ownable {
+  address[] public nodes;
+
+  constructor() public Ownable() {
+  }
+
+  function addNode(address nodeAccount) public onlyOwner {
+    nodes.push(nodeAccount);
+  }
+
+  function removeNode(address nodeAccount) public onlyOwner {
+    for (uint256 i = 0; i <= nodes.length-1; i++){
+      if (nodes[i] == nodeAccount) {
+        for (uint256 j = i; j < nodes.length-1; j++){
+          nodes[j] = nodes[j+1];
+        }
+        delete nodes[nodes.length-1];
+        if (nodes.length == 1) {
+          delete nodes;
+        }
+        break;
+      }
+    }
+  }
+
+  function getNodes() public view returns (address[] memory) {
+    return nodes;
+  }
+}
diff --git a/eth-contracts/migrations/1_initial_migration.js b/eth-contracts/migrations/1_initial_migration.js
new file mode 100644
index 0000000..77c5969
--- /dev/null
+++ b/eth-contracts/migrations/1_initial_migration.js
@@ -0,0 +1,18 @@
+const Whitelist = artifacts.require("Whitelist");
+const OracleEmitter = artifacts.require("OracleEmitter");
+const Aggregator = artifacts.require("Aggregator");
+const Mediator = artifacts.require("Mediator");
+
+module.exports = function (deployer) {
+  return deployer
+    .then(() => {
+      return deployer.deploy(Whitelist);
+    })
+    .then(() => {
+      return deployer.deploy(OracleEmitter);
+    }).then(() => {
+      return deployer.deploy(Aggregator, Whitelist.address);
+    }).then(() => {
+      return deployer.deploy(Mediator, OracleEmitter.address, Aggregator.address);
+    });
+};
diff --git a/eth-contracts/package-lock.json b/eth-contracts/package-lock.json
new file mode 100644
index 0000000..775a703
--- /dev/null
+++ b/eth-contracts/package-lock.json
@@ -0,0 +1,4631 @@
+{
+  "name": "p2p-oracle-smart-contracts",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/helper-module-imports": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.10.4.tgz",
+      "integrity": "sha512-nEQJHqYavI217oD9+s5MUBzk6x1IlvoS9WTPfgG43CbMEeStE0v+r+TucWdx8KFGowPGvyOkDT9+7DHedIDnVw==",
+      "requires": {
+        "@babel/types": "7.11.0"
+      }
+    },
+    "@babel/helper-plugin-utils": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.10.4.tgz",
+      "integrity": "sha512-O4KCvQA6lLiMU9l2eawBPMf1xPP8xPfB3iEQw150hOVTqj/rfXz0ThTb4HEzqQfs2Bmo5Ay8BzxfzVtBrr9dVg=="
+    },
+    "@babel/helper-validator-identifier": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.4.tgz",
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+    },
+    "@babel/plugin-transform-runtime": {
+      "version": "7.11.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-runtime/-/plugin-transform-runtime-7.11.0.tgz",
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+      "requires": {
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+        "@babel/helper-plugin-utils": "7.10.4",
+        "resolve": "1.17.0",
+        "semver": "5.7.1"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
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+        "lodash": "4.17.19",
+        "to-fast-properties": "2.0.0"
+      }
+    },
+    "@ethersproject/abi": {
+      "version": "5.0.0-beta.153",
+      "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.0.0-beta.153.tgz",
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+            "is-fullwidth-code-point": "2.0.0",
+            "strip-ansi": "5.2.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "requires": {
+            "ansi-regex": "4.1.0"
+          }
+        }
+      }
+    },
+    "yargs-parser": {
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
+      "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
+      "requires": {
+        "camelcase": "5.3.1",
+        "decamelize": "1.2.0"
+      }
+    },
+    "yargs-unparser": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
+      "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "requires": {
+        "flat": "4.1.0",
+        "lodash": "4.17.19",
+        "yargs": "13.3.2"
+      }
+    }
+  }
+}
diff --git a/eth-contracts/package.json b/eth-contracts/package.json
new file mode 100644
index 0000000..62f4461
--- /dev/null
+++ b/eth-contracts/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "p2p-oracle-smart-contracts",
+  "version": "0.0.1",
+  "description": "Smart contracts for p2p oracle network",
+  "main": "truffle-config.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "@truffle/hdwallet-provider": "^1.0.40",
+    "dotenv": "^8.2.0",
+    "truffle": "^5.1.37"
+  }
+}
diff --git a/eth-contracts/test/.gitkeep b/eth-contracts/test/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/eth-contracts/truffle-config.js b/eth-contracts/truffle-config.js
new file mode 100644
index 0000000..873cf9f
--- /dev/null
+++ b/eth-contracts/truffle-config.js
@@ -0,0 +1,41 @@
+require('dotenv').config();
+const customProvider = (mnemonic, rpcEndpoint) => () =>
+  new HDWalletProvider(mnemonic, rpcEndpoint);
+
+const infuraProvider = (network) =>
+  customProvider(
+    process.env.MNEMONIC || process.env.PRIVATE_KEY || '',
+    `https://${network}.infura.io/v3/${process.env.WEB3_INFURA_ID}`,
+  );
+
+const ropstenProvider = infuraProvider('ropsten');
+
+module.exports = {
+  networks: {
+    development: {
+      host: "127.0.0.1",     // Localhost (default: none)
+      port: 7545,            // Standard Ethereum port (default: none)
+      network_id: "*",       // Any network (default: none)
+    },
+    ropsten: {
+      provider: ropstenProvider,
+      network_id: 3,
+      // gasPrice: 5000000000,
+      // gas: 4500000,
+      // gasPrice: 10000000000,
+      // confirmations: 0, // # of confs to wait between deployments. (default: 0)
+      skipDryRun: true,
+    },
+  },
+  compilers: {
+    solc: {
+      version: '0.6.12',
+      settings: {
+        optimizer: {
+          enabled: true, // Default: false
+          runs: 0, // Default: 200
+        },
+      },
+    },
+  }
+};
diff --git a/go.mod b/go.mod
index 24bea65..b093e24 100644
--- a/go.mod
+++ b/go.mod
@@ -5,8 +5,11 @@ go 1.14
 require (
 	github.com/deckarep/golang-set v1.7.1
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
+	github.com/edsrzf/mmap-go v1.0.0 // indirect
 	github.com/ethereum/go-ethereum v1.9.5
+	github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08 // indirect
 	github.com/ipfs/go-log v1.0.4
+	github.com/karalabe/usb v0.0.0-20191104083709-911d15fe12a9 // indirect
 	github.com/libp2p/go-libp2p v0.10.2
 	github.com/libp2p/go-libp2p-core v0.6.1
 	github.com/libp2p/go-libp2p-discovery v0.5.0
@@ -15,6 +18,14 @@ require (
 	github.com/libp2p/go-libp2p-peerstore v0.2.6
 	github.com/libp2p/go-libp2p-pubsub v0.3.3
 	github.com/multiformats/go-multiaddr v0.2.2
-	github.com/renproject/mercury v0.3.14
+	github.com/olekukonko/tablewriter v0.0.4 // indirect
+	github.com/pborman/uuid v1.2.0 // indirect
+	github.com/renproject/hyperdrive v1.2.0
+	github.com/rjeczalik/notify v0.9.2 // indirect
+	github.com/rs/cors v1.7.0 // indirect
 	github.com/spf13/viper v1.7.1
+	github.com/status-im/keycard-go v0.0.0-20200402102358-957c09536969 // indirect
+	github.com/tyler-smith/go-bip39 v1.0.2 // indirect
+	github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 // indirect
+	golang.org/x/crypto v0.0.0-20200423211502-4bdfaf469ed5
 )
diff --git a/go.sum b/go.sum
index 4e06395..b2e4a82 100644
--- a/go.sum
+++ b/go.sum
@@ -23,11 +23,13 @@ github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOv
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/DataDog/zstd v1.3.6-0.20190409195224-796139022798/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/Kubuxu/go-os-helper v0.0.1/go.mod h1:N8B+I7vPCT80IcP58r50u4+gEEcsZETFUpAzWW2ep1Y=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
+github.com/Shopify/sarama v1.23.1/go.mod h1:XLH1GYJnLVE0XCr6KdJGVJRTwY30moWNJ4sERjXX6fs=
 github.com/Shopify/sarama v1.26.1/go.mod h1:NbSGBSSndYaIhRcBtY9V0U7AyH+x71bG668AuWys/yU=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
@@ -45,7 +47,10 @@ github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kd
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/aristanetworks/fsnotify v1.4.2/go.mod h1:D/rtu7LpjYM8tRJphJ0hUBYpjai8SfX+aSNsWDTq/Ks=
+github.com/aristanetworks/glog v0.0.0-20180419172825-c15b03b3054f/go.mod h1:KASm+qXFKs/xjSoWn30NrWBBvdTTQq+UjkhjEJHfSFA=
 github.com/aristanetworks/glog v0.0.0-20191112221043-67e8567f59f3/go.mod h1:KASm+qXFKs/xjSoWn30NrWBBvdTTQq+UjkhjEJHfSFA=
+github.com/aristanetworks/goarista v0.0.0-20200224203130-895b4c57c44d h1:dp3WUsx0f1TjLuuuDIrt4N/NmN/nlsgWbhJ4JICq8dE=
+github.com/aristanetworks/goarista v0.0.0-20200224203130-895b4c57c44d/go.mod h1:fc4cJJjY+PlmFYIjSFJ/OPWG8R2B/ue7+q2YbMkirTo=
 github.com/aristanetworks/goarista v0.0.0-20200310212843-2da4c1f5881b h1:VBFuX8nQQ57A6OGYGOLugx/Sc488F0nNIdTtcmNq9qE=
 github.com/aristanetworks/goarista v0.0.0-20200310212843-2da4c1f5881b/go.mod h1:QZe5Yh80Hp1b6JxQdpfSEEe8X7hTyTEZSosSrFf/oJE=
 github.com/aristanetworks/splunk-hec-go v0.3.3/go.mod h1:1VHO9r17b0K7WmOlLb9nTk/2YanvOEnLMUgsFrxBROc=
@@ -80,6 +85,7 @@ github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13P
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btcutil v0.0.0-20190207003914-4c204d697803/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
 github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
+github.com/btcsuite/btcutil v1.0.1/go.mod h1:j9HUFwoQRsZL3V4n+qG+CUnEGHOarIxfC3Le2Yhbcts=
 github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd/go.mod h1:HHNXQzUsZCxOoE+CPiyCTO6x34Zs86zZUiwtpXoGdtg=
 github.com/btcsuite/goleveldb v0.0.0-20160330041536-7834afc9e8cd/go.mod h1:F+uVaaLLH7j4eDXPRvw78tMflu7Ie2bzYOH4Y8rRKBY=
 github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg3lh6TiUghc=
@@ -121,6 +127,7 @@ github.com/cskr/pubsub v1.0.2 h1:vlOzMhl6PFn60gRlTQQsIfVwaPB/B/8MziK8FhEPt/0=
 github.com/cskr/pubsub v1.0.2/go.mod h1:/8MzYXk/NJAz782G8RPkFzXTZVu63VotefPnR9TIRis=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davidlazar/go-crypto v0.0.0-20170701192655-dcfb0a7ac018 h1:6xT9KW8zLC5IlbaIF5Q7JNieBoACT7iW0YTxQHR0in0=
 github.com/davidlazar/go-crypto v0.0.0-20170701192655-dcfb0a7ac018/go.mod h1:rQYf4tfk5sSwFsnDg3qYaBxSjsD9S8+59vW0dKUgme4=
@@ -155,6 +162,7 @@ github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5m
 github.com/eapache/go-resiliency v1.2.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
+github.com/edsrzf/mmap-go v1.0.0 h1:CEBF7HpRnUCSJgGUb5h1Gm7e3VkmVDrR8lvWVLtrOFw=
 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
 github.com/elastic/gosigar v0.10.5 h1:GzPQ+78RaAb4J63unidA/JavQRKrB6s8IOzN6Ib59jo=
 github.com/elastic/gosigar v0.10.5/go.mod h1:cdorVVzy1fhmEqmtgqkoE3bYtCfSCkVyjTyCIo22xvs=
@@ -177,6 +185,7 @@ github.com/frankban/quicktest v1.7.2/go.mod h1:jaStnuzAqU1AJdCO0l53JDCJrVDKcS03D
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/garyburd/redigo v1.6.0/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
+github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08 h1:f6D9Hr8xV8uYKlyuj8XIruxlh9WjVjdh1gIicAS7ays=
 github.com/gballet/go-libpcsclite v0.0.0-20191108122812-4678299bea08/go.mod h1:x7DCsMOv1taUwEWCzT4cmDeAkigA5/QCwUodaVOe8Ww=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gliderlabs/ssh v0.1.1/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
@@ -227,11 +236,13 @@ github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0 h1:oOuy+ugB+P/kBdUnG5QaMXSIyJ1q38wWSojYCb3z5VQ=
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -323,6 +334,7 @@ github.com/huin/goupnp v1.0.0 h1:wg75sLpL6DZqwHQN6E1Cfk6mtfzS45z8OV+ic+DtHRo=
 github.com/huin/goupnp v1.0.0/go.mod h1:n9v9KO1tAxYH82qOn+UTIFQDmx5n1Zxd/ClZDMX7Bnc=
 github.com/huin/goutil v0.0.0-20170803182201-1ca381bf3150/go.mod h1:PpLOETDnJ0o3iZrZfqZzyLl6l7F3c6L1oWn7OICBi6o=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/influxdata/influxdb1-client v0.0.0-20190809212627-fc22c7df067e/go.mod h1:qj24IKcXYK6Iy9ceXlo3Tc+vtHo9lIhSX5JddghvEPo=
 github.com/influxdata/influxdb1-client v0.0.0-20191209144304-8bf82d3c094d/go.mod h1:qj24IKcXYK6Iy9ceXlo3Tc+vtHo9lIhSX5JddghvEPo=
 github.com/ipfs/go-cid v0.0.1/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
 github.com/ipfs/go-cid v0.0.2/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
@@ -380,6 +392,7 @@ github.com/jbenet/goprocess v0.0.0-20160826012719-b497e2f366b8/go.mod h1:Ly/wlsj
 github.com/jbenet/goprocess v0.1.3/go.mod h1:5yspPrukOVuOLORacaBi858NqyClJPQxYZlqdZVfqY4=
 github.com/jbenet/goprocess v0.1.4 h1:DRGOFReOMqqDNXwW70QkacFW0YN9QnwLV0Vqk+3oU0o=
 github.com/jbenet/goprocess v0.1.4/go.mod h1:5yspPrukOVuOLORacaBi858NqyClJPQxYZlqdZVfqY4=
+github.com/jcmturner/gofork v0.0.0-20190328161633-dc7c13fece03/go.mod h1:MK8+TM0La+2rjBD4jE12Kj1pCCxK7d2LK/UM3ncEo0o=
 github.com/jcmturner/gofork v1.0.0/go.mod h1:MK8+TM0La+2rjBD4jE12Kj1pCCxK7d2LK/UM3ncEo0o=
 github.com/jellevandenhooff/dkim v0.0.0-20150330215556-f50fe3d243e1/go.mod h1:E0B/fFc00Y+Rasa88328GlI/XbtyysCtTHZS8h7IrBU=
 github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
@@ -403,6 +416,7 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
 github.com/kabukky/httpscerts v0.0.0-20150320125433-617593d7dcb3 h1:Iy7Ifq2ysilWU4QlCx/97OoI4xT1IV7i8byT/EyIT/M=
 github.com/kabukky/httpscerts v0.0.0-20150320125433-617593d7dcb3/go.mod h1:BYpt4ufZiIGv2nXn4gMxnfKV306n3mWXgNu/d2TqdTU=
 github.com/kami-zh/go-capturer v0.0.0-20171211120116-e492ea43421d/go.mod h1:P2viExyCEfeWGU259JnaQ34Inuec4R38JCyBx2edgD0=
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@@ -805,6 +826,7 @@ github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXP
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 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
+github.com/tyler-smith/go-bip39 v1.0.2 h1:+t3w+KwLXO6154GNJY+qUtIxLTmFjfUmpguQT1OlOT8=
 github.com/tyler-smith/go-bip39 v1.0.2/go.mod h1:sJ5fKU0s6JVwZjjcUEX2zFOnvq0ASQ2K9Zr6cf67kNs=
 github.com/uber/jaeger-client-go v2.15.0+incompatible/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
 github.com/uber/jaeger-client-go v2.23.1+incompatible h1:uArBYHQR0HqLFFAypI7RsWTzPSj/bDpmZZuQjMLSg1A=
@@ -973,12 +1018,14 @@ github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7 h1:
 github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7/go.mod h1:X2c0RVCI1eSUFI8eLcY3c0423ykwiUdxLJtkDvruhjI=
 github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee h1:lYbXeSvJi5zk5GLKVuid9TVjS9a0OmLIDKTfoZBL6Ow=
 github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee/go.mod h1:m2aV4LZI4Aez7dP5PMyVKEHhUyEJ/RjmPEDOpDvudHg=
+github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 h1:1cngl9mPEoITZG8s8cVcUy5CeIBYhEESkOB7m6Gmkrk=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208/go.mod h1:IotVbo4F+mw0EzQ08zFqg7pK3FebNXpaMsRy2RT+Ees=
 github.com/x-cray/logrus-prefixed-formatter v0.5.2/go.mod h1:2duySbKsL6M18s5GU7VPsoEPHyzalCE06qoARUCeBBE=
 github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhemzwFU4jHLhdvlE6uDZjXFejJXr49I=
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
+github.com/xtaci/kcp-go v5.4.5+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/kcp-go v5.4.20+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae/go.mod h1:gXtu8J62kEgmN++bm9BVICuT/e8yiLI2KFobd/TRFsE=
 go.dedis.ch/fixbuf v1.0.3 h1:hGcV9Cd/znUxlusJ64eAlExS+5cJDIyTyEG+otu5wQs=
@@ -1034,6 +1081,7 @@ golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20190225124518-7f87c0fbb88b/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190404164418-38d8ce5564a5/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
 golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -1041,9 +1089,12 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190618222545-ea8f1a30c443/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190911031432-227b76d455e7/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 h1:ObdrDkeb4kJdCP557AjRjq69pTHfNouLtWZG7j9rPN8=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191219195013-becbf705a915/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200128174031-69ecbb4d6d5d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200204104054-c9f3fb736b72/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@@ -1098,6 +1149,7 @@ golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190912160710-24e19bdeb0f2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190921015927-1a5e07d1ff72/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190923162816-aa69164e4478 h1:l5EDrHhldLYb3ZRHDUhXF7Om7MvYXnkV9/iQNo1lX6g=
 golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -1140,6 +1192,7 @@ golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190228124157-a34e9553db1e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190316082340-a2f829d7f35f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190405154228-4b34438f7a67/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190411185658-b44545bcd369/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1151,9 +1204,11 @@ golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190902133755-9109b7679e13/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190912141932-bc967efca4b8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191025090151-53bf42e6b339/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1203,6 +1258,7 @@ golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190912185636-87d9f09c5d89/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -1275,6 +1331,7 @@ google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQ
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEGA=
@@ -1294,6 +1351,7 @@ gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/jcmturner/aescts.v1 v1.0.1/go.mod h1:nsR8qBOg+OucoIW+WMhB3GspUQXq9XorLnQb9XtvcOo=
 gopkg.in/jcmturner/dnsutils.v1 v1.0.1/go.mod h1:m3v+5svpVOhtFAP/wSz+yzh4Mc0Fg7eRhxkJMWSIz9Q=
 gopkg.in/jcmturner/goidentity.v3 v3.0.0/go.mod h1:oG2kH0IvSYNIu80dVAyu/yoefjq1mNfM5bm88whjWx4=
+gopkg.in/jcmturner/gokrb5.v7 v7.2.3/go.mod h1:l8VISx+WGYp+Fp7KRbsiUuXTTOnxIc3Tuvyavf11/WM=
 gopkg.in/jcmturner/gokrb5.v7 v7.5.0/go.mod h1:l8VISx+WGYp+Fp7KRbsiUuXTTOnxIc3Tuvyavf11/WM=
 gopkg.in/jcmturner/rpc.v1 v1.1.0/go.mod h1:YIdkC4XfD6GXbzje11McwsDuOlZQSb9W4vfLvuNnlv8=
 gopkg.in/redis.v4 v4.2.4/go.mod h1:8KREHdypkCEojGKQcjMqAODMICIVwZAONWq8RowTITA=
diff --git a/main.go b/p2p-oracle-node.go
similarity index 100%
rename from main.go
rename to p2p-oracle-node.go
diff --git a/rpcclient/ethereum.go b/rpcclient/ethereum.go
index 0fc9175..f77d2a5 100644
--- a/rpcclient/ethereum.go
+++ b/rpcclient/ethereum.go
@@ -2,50 +2,131 @@ package rpcclient
 
 import (
 	"context"
+	"crypto/ecdsa"
 	"fmt"
-	"log"
+	"io/ioutil"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ipfs/go-log"
 )
 
 type ethereumClient struct {
-	httpClient *ethclient.Client
-	wsClient   *ethclient.Client
-	logger     log.Logger
+	HttpClient *ethclient.Client
+	WsClient   *ethclient.Client
+	Logger     *log.ZapEventLogger
 }
 
 type EthereumClient interface {
 	Connect(context.Context, string) error
-	Balance(context.Context, common.Address) (*big.Int, error)
+	Balance(context.Context, string) (*big.Int, error)
 	SubscribeOnSmartContractEvents(context.Context, string)
+	GenerateAddressFromPrivateKey(string) string
+	SendTransaction(string, string, int64) string
+	createKeyStore(string) string
+	importKeyStore(string, string) string
 }
 
 func (c *ethereumClient) Connect(ctx context.Context, url string, connectionType string) error {
 	client, err := ethclient.Dial(url)
 	if err != nil {
-		c.logger.Fatal(err)
+		c.Logger.Fatal(err)
 	}
 	if connectionType == "websocket" {
-		c.wsClient = client
+		c.WsClient = client
 	} else {
-		c.httpClient = client
+		c.HttpClient = client
 	}
 	return nil
 }
 
 // Balance returns the balance of the given ethereum address.
-func (c *ethereumClient) Balance(ctx context.Context, address common.Address) (*big.Int, error) {
-	value, err := c.httpClient.BalanceAt(ctx, address, nil)
+func (c *ethereumClient) Balance(ctx context.Context, address string) (*big.Int, error) {
+	ethereumAddress := common.HexToAddress(address)
+	value, err := c.HttpClient.BalanceAt(ctx, ethereumAddress, nil)
 	if err != nil {
 		return nil, err
 	}
 	return value, nil
 }
 
+func (c *ethereumClient) SendTransaction(private_key, to string, amount int64) string {
+	privateKey, err := crypto.HexToECDSA(private_key)
+	if err != nil {
+		c.Logger.Fatal("Failed to parse private key", err)
+	}
+
+	publicKey := privateKey.Public()
+	publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
+	if !ok {
+		c.Logger.Fatal("Cannot assert type: publicKey is not of type *ecdsa.PublicKey", err)
+	}
+
+	fromAddress := crypto.PubkeyToAddress(*publicKeyECDSA)
+	nonce, err := c.HttpClient.PendingNonceAt(context.Background(), fromAddress)
+	if err != nil {
+		c.Logger.Fatal("Failed to generate wallet nonce value", err)
+	}
+
+	value := big.NewInt(amount)
+	gasLimit := uint64(21000) // in units
+	gasPrice, err := c.HttpClient.SuggestGasPrice(context.Background())
+	if err != nil {
+		c.Logger.Fatal("Failed to suggest new gas price", err)
+	}
+
+	toAddress := common.HexToAddress(to)
+	var data []byte
+	tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, data)
+
+	chainID, err := c.HttpClient.NetworkID(context.Background())
+	if err != nil {
+		c.Logger.Fatal("Failed to get network ID", err)
+	}
+
+	signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID), privateKey)
+	if err != nil {
+		c.Logger.Fatal("Failed to sign transaction", err)
+	}
+
+	err = c.HttpClient.SendTransaction(context.Background(), signedTx)
+	if err != nil {
+		c.Logger.Fatal("Failed to send signed transaction", err)
+	}
+
+	TxHash := signedTx.Hash().Hex()
+
+	c.Logger.Info("Transaction sent: %s", TxHash)
+
+	return TxHash
+}
+
+func (c *ethereumClient) GenerateAddressFromPrivateKey(private_key string) string {
+	privateKey, err := crypto.HexToECDSA(private_key)
+	if err != nil {
+		c.Logger.Fatal("Failed to generate private key", err)
+	}
+
+	publicKey := privateKey.Public()
+	publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
+	if !ok {
+		c.Logger.Fatal("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
+	}
+
+	publicKeyBytes := crypto.FromECDSAPub(publicKeyECDSA)
+	c.Logger.Info(hexutil.Encode(publicKeyBytes)[4:])
+
+	address := crypto.PubkeyToAddress(*publicKeyECDSA).Hex()
+
+	return address
+}
+
 func (c *ethereumClient) SubscribeOnSmartContractEvents(ctx context.Context, address string) {
 	contractAddress := common.HexToAddress(address)
 	query := ethereum.FilterQuery{
@@ -53,18 +134,43 @@ func (c *ethereumClient) SubscribeOnSmartContractEvents(ctx context.Context, add
 	}
 
 	logs := make(chan types.Log)
-	sub, err := c.wsClient.SubscribeFilterLogs(context.Background(), query, logs)
+	sub, err := c.WsClient.SubscribeFilterLogs(context.Background(), query, logs)
 	if err != nil {
-		c.logger.Fatal(err)
+		c.Logger.Fatal(err)
 	}
 
 	for {
 		select {
 		case err := <-sub.Err():
-			c.logger.Fatal(err)
+			c.Logger.Fatal(err)
 		case vLog := <-logs:
 			fmt.Println(vLog) // pointer to event log
 		}
 	}
 
 }
+
+func (c *ethereumClient) createKeyStore(password string) string {
+	ks := keystore.NewKeyStore("./wallets", keystore.StandardScryptN, keystore.StandardScryptP)
+	account, err := ks.NewAccount(password)
+	if err != nil {
+		c.Logger.Fatal("Failed to create new keystore", err)
+	}
+
+	return account.Address.Hex()
+}
+
+func (c *ethereumClient) importKeyStore(filePath string, password string) string {
+	ks := keystore.NewKeyStore("./wallets", keystore.StandardScryptN, keystore.StandardScryptP)
+	jsonBytes, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		c.Logger.Fatal("Failed to read keystore file", err)
+	}
+
+	account, err := ks.Import(jsonBytes, password, password)
+	if err != nil {
+		c.Logger.Fatal("Failed to import keystore", err)
+	}
+
+	return account.Address.Hex()
+}
diff --git a/rpcclient/lotus.go b/rpcclient/lotus.go
new file mode 100644
index 0000000..46bd2aa
--- /dev/null
+++ b/rpcclient/lotus.go
@@ -0,0 +1 @@
+package rpcclient