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all: on-chain oracle checkpoint syncing (#19543)

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* all: implement simple checkpoint syncing

cmd, les, node: remove callback mechanism

cmd, node: remove callback definition

les: simplify the registrar

les: expose checkpoint rpc services in the light client

les, light: don't store untrusted receipt

cmd, contracts, les: discard stale checkpoint

cmd, contracts/registrar: loose restriction of registeration

cmd, contracts: add replay-protection

all: off-chain multi-signature contract

params: deploy checkpoint contract for rinkeby

cmd/registrar: add raw signing mode for registrar

cmd/registrar, contracts/registrar, les: fixed messages

* cmd/registrar, contracts/registrar: fix lints

* accounts/abi/bind, les: address comments

* cmd, contracts, les, light, params: minor checkpoint sync cleanups

* cmd, eth, les, light: move checkpoint config to config file

* cmd, eth, les, params: address comments

* eth, les, params: address comments

* cmd: polish up the checkpoint admin CLI

* cmd, contracts, params: deploy new version contract

* cmd/checkpoint-admin: add another flag for clef mode signing

* cmd, contracts, les: rename and regen checkpoint oracle with abigen
This commit is contained in:
gary rong
2019-06-28 15:34:02 +08:00
committed by Péter Szilágyi
parent 702f52fb99
commit f7cdea2bdc
49 changed files with 2861 additions and 383 deletions
Download Patch File Download Diff File Expand all files Collapse all files

415
contracts/checkpointoracle/contract/oracle.go Normal file
View File

@ -0,0 +1,415 @@
// Code generated - DO NOT EDIT.
// This file is a generated binding and any manual changes will be lost.
package contract
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
_ = abi.U256
_ = bind.Bind
_ = common.Big1
_ = types.BloomLookup
_ = event.NewSubscription
)
// CheckpointOracleABI is the input ABI used to generate the binding from.
const CheckpointOracleABI = "[{\"constant\":true,\"inputs\":[],\"name\":\"GetAllAdmin\",\"outputs\":[{\"name\":\"\",\"type\":\"address[]\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"GetLatestCheckpoint\",\"outputs\":[{\"name\":\"\",\"type\":\"uint64\"},{\"name\":\"\",\"type\":\"bytes32\"},{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"_recentNumber\",\"type\":\"uint256\"},{\"name\":\"_recentHash\",\"type\":\"bytes32\"},{\"name\":\"_hash\",\"type\":\"bytes32\"},{\"name\":\"_sectionIndex\",\"type\":\"uint64\"},{\"name\":\"v\",\"type\":\"uint8[]\"},{\"name\":\"r\",\"type\":\"bytes32[]\"},{\"name\":\"s\",\"type\":\"bytes32[]\"}],\"name\":\"SetCheckpoint\",\"outputs\":[{\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_adminlist\",\"type\":\"address[]\"},{\"name\":\"_sectionSize\",\"type\":\"uint256\"},{\"name\":\"_processConfirms\",\"type\":\"uint256\"},{\"name\":\"_threshold\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"index\",\"type\":\"uint64\"},{\"indexed\":false,\"name\":\"checkpointHash\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"v\",\"type\":\"uint8\"},{\"indexed\":false,\"name\":\"r\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"s\",\"type\":\"bytes32\"}],\"name\":\"NewCheckpointVote\",\"type\":\"event\"}]"
// CheckpointOracleBin is the compiled bytecode used for deploying new contracts.
const CheckpointOracleBin = `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`
// DeployCheckpointOracle deploys a new Ethereum contract, binding an instance of CheckpointOracle to it.
func DeployCheckpointOracle(auth *bind.TransactOpts, backend bind.ContractBackend, _adminlist []common.Address, _sectionSize *big.Int, _processConfirms *big.Int, _threshold *big.Int) (common.Address, *types.Transaction, *CheckpointOracle, error) {
parsed, err := abi.JSON(strings.NewReader(CheckpointOracleABI))
if err != nil {
return common.Address{}, nil, nil, err
}
address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(CheckpointOracleBin), backend, _adminlist, _sectionSize, _processConfirms, _threshold)
if err != nil {
return common.Address{}, nil, nil, err
}
return address, tx, &CheckpointOracle{CheckpointOracleCaller: CheckpointOracleCaller{contract: contract}, CheckpointOracleTransactor: CheckpointOracleTransactor{contract: contract}, CheckpointOracleFilterer: CheckpointOracleFilterer{contract: contract}}, nil
}
// CheckpointOracle is an auto generated Go binding around an Ethereum contract.
type CheckpointOracle struct {
CheckpointOracleCaller // Read-only binding to the contract
CheckpointOracleTransactor // Write-only binding to the contract
CheckpointOracleFilterer // Log filterer for contract events
}
// CheckpointOracleCaller is an auto generated read-only Go binding around an Ethereum contract.
type CheckpointOracleCaller struct {
contract *bind.BoundContract // Generic contract wrapper for the low level calls
}
// CheckpointOracleTransactor is an auto generated write-only Go binding around an Ethereum contract.
type CheckpointOracleTransactor struct {
contract *bind.BoundContract // Generic contract wrapper for the low level calls
}
// CheckpointOracleFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
type CheckpointOracleFilterer struct {
contract *bind.BoundContract // Generic contract wrapper for the low level calls
}
// CheckpointOracleSession is an auto generated Go binding around an Ethereum contract,
// with pre-set call and transact options.
type CheckpointOracleSession struct {
Contract *CheckpointOracle // 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
}
// CheckpointOracleCallerSession is an auto generated read-only Go binding around an Ethereum contract,
// with pre-set call options.
type CheckpointOracleCallerSession struct {
Contract *CheckpointOracleCaller // Generic contract caller binding to set the session for
CallOpts bind.CallOpts // Call options to use throughout this session
}
// CheckpointOracleTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
// with pre-set transact options.
type CheckpointOracleTransactorSession struct {
Contract *CheckpointOracleTransactor // Generic contract transactor binding to set the session for
TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
}
// CheckpointOracleRaw is an auto generated low-level Go binding around an Ethereum contract.
type CheckpointOracleRaw struct {
Contract *CheckpointOracle // Generic contract binding to access the raw methods on
}
// CheckpointOracleCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
type CheckpointOracleCallerRaw struct {
Contract *CheckpointOracleCaller // Generic read-only contract binding to access the raw methods on
}
// CheckpointOracleTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
type CheckpointOracleTransactorRaw struct {
Contract *CheckpointOracleTransactor // Generic write-only contract binding to access the raw methods on
}
// NewCheckpointOracle creates a new instance of CheckpointOracle, bound to a specific deployed contract.
func NewCheckpointOracle(address common.Address, backend bind.ContractBackend) (*CheckpointOracle, error) {
contract, err := bindCheckpointOracle(address, backend, backend, backend)
if err != nil {
return nil, err
}
return &CheckpointOracle{CheckpointOracleCaller: CheckpointOracleCaller{contract: contract}, CheckpointOracleTransactor: CheckpointOracleTransactor{contract: contract}, CheckpointOracleFilterer: CheckpointOracleFilterer{contract: contract}}, nil
}
// NewCheckpointOracleCaller creates a new read-only instance of CheckpointOracle, bound to a specific deployed contract.
func NewCheckpointOracleCaller(address common.Address, caller bind.ContractCaller) (*CheckpointOracleCaller, error) {
contract, err := bindCheckpointOracle(address, caller, nil, nil)
if err != nil {
return nil, err
}
return &CheckpointOracleCaller{contract: contract}, nil
}
// NewCheckpointOracleTransactor creates a new write-only instance of CheckpointOracle, bound to a specific deployed contract.
func NewCheckpointOracleTransactor(address common.Address, transactor bind.ContractTransactor) (*CheckpointOracleTransactor, error) {
contract, err := bindCheckpointOracle(address, nil, transactor, nil)
if err != nil {
return nil, err
}
return &CheckpointOracleTransactor{contract: contract}, nil
}
// NewCheckpointOracleFilterer creates a new log filterer instance of CheckpointOracle, bound to a specific deployed contract.
func NewCheckpointOracleFilterer(address common.Address, filterer bind.ContractFilterer) (*CheckpointOracleFilterer, error) {
contract, err := bindCheckpointOracle(address, nil, nil, filterer)
if err != nil {
return nil, err
}
return &CheckpointOracleFilterer{contract: contract}, nil
}
// bindCheckpointOracle binds a generic wrapper to an already deployed contract.
func bindCheckpointOracle(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
parsed, err := abi.JSON(strings.NewReader(CheckpointOracleABI))
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 (_CheckpointOracle *CheckpointOracleRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
return _CheckpointOracle.Contract.CheckpointOracleCaller.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 (_CheckpointOracle *CheckpointOracleRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
return _CheckpointOracle.Contract.CheckpointOracleTransactor.contract.Transfer(opts)
}
// Transact invokes the (paid) contract method with params as input values.
func (_CheckpointOracle *CheckpointOracleRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
return _CheckpointOracle.Contract.CheckpointOracleTransactor.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 (_CheckpointOracle *CheckpointOracleCallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
return _CheckpointOracle.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 (_CheckpointOracle *CheckpointOracleTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
return _CheckpointOracle.Contract.contract.Transfer(opts)
}
// Transact invokes the (paid) contract method with params as input values.
func (_CheckpointOracle *CheckpointOracleTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
return _CheckpointOracle.Contract.contract.Transact(opts, method, params...)
}
// GetAllAdmin is a free data retrieval call binding the contract method 0x45848dfc.
//
// Solidity: function GetAllAdmin() constant returns(address[])
func (_CheckpointOracle *CheckpointOracleCaller) GetAllAdmin(opts *bind.CallOpts) ([]common.Address, error) {
var (
ret0 = new([]common.Address)
)
out := ret0
err := _CheckpointOracle.contract.Call(opts, out, "GetAllAdmin")
return *ret0, err
}
// GetAllAdmin is a free data retrieval call binding the contract method 0x45848dfc.
//
// Solidity: function GetAllAdmin() constant returns(address[])
func (_CheckpointOracle *CheckpointOracleSession) GetAllAdmin() ([]common.Address, error) {
return _CheckpointOracle.Contract.GetAllAdmin(&_CheckpointOracle.CallOpts)
}
// GetAllAdmin is a free data retrieval call binding the contract method 0x45848dfc.
//
// Solidity: function GetAllAdmin() constant returns(address[])
func (_CheckpointOracle *CheckpointOracleCallerSession) GetAllAdmin() ([]common.Address, error) {
return _CheckpointOracle.Contract.GetAllAdmin(&_CheckpointOracle.CallOpts)
}
// GetLatestCheckpoint is a free data retrieval call binding the contract method 0x4d6a304c.
//
// Solidity: function GetLatestCheckpoint() constant returns(uint64, bytes32, uint256)
func (_CheckpointOracle *CheckpointOracleCaller) GetLatestCheckpoint(opts *bind.CallOpts) (uint64, [32]byte, *big.Int, error) {
var (
ret0 = new(uint64)
ret1 = new([32]byte)
ret2 = new(*big.Int)
)
out := &[]interface{}{
ret0,
ret1,
ret2,
}
err := _CheckpointOracle.contract.Call(opts, out, "GetLatestCheckpoint")
return *ret0, *ret1, *ret2, err
}
// GetLatestCheckpoint is a free data retrieval call binding the contract method 0x4d6a304c.
//
// Solidity: function GetLatestCheckpoint() constant returns(uint64, bytes32, uint256)
func (_CheckpointOracle *CheckpointOracleSession) GetLatestCheckpoint() (uint64, [32]byte, *big.Int, error) {
return _CheckpointOracle.Contract.GetLatestCheckpoint(&_CheckpointOracle.CallOpts)
}
// GetLatestCheckpoint is a free data retrieval call binding the contract method 0x4d6a304c.
//
// Solidity: function GetLatestCheckpoint() constant returns(uint64, bytes32, uint256)
func (_CheckpointOracle *CheckpointOracleCallerSession) GetLatestCheckpoint() (uint64, [32]byte, *big.Int, error) {
return _CheckpointOracle.Contract.GetLatestCheckpoint(&_CheckpointOracle.CallOpts)
}
// SetCheckpoint is a paid mutator transaction binding the contract method 0xd459fc46.
//
// Solidity: function SetCheckpoint(uint256 _recentNumber, bytes32 _recentHash, bytes32 _hash, uint64 _sectionIndex, uint8[] v, bytes32[] r, bytes32[] s) returns(bool)
func (_CheckpointOracle *CheckpointOracleTransactor) SetCheckpoint(opts *bind.TransactOpts, _recentNumber *big.Int, _recentHash [32]byte, _hash [32]byte, _sectionIndex uint64, v []uint8, r [][32]byte, s [][32]byte) (*types.Transaction, error) {
return _CheckpointOracle.contract.Transact(opts, "SetCheckpoint", _recentNumber, _recentHash, _hash, _sectionIndex, v, r, s)
}
// SetCheckpoint is a paid mutator transaction binding the contract method 0xd459fc46.
//
// Solidity: function SetCheckpoint(uint256 _recentNumber, bytes32 _recentHash, bytes32 _hash, uint64 _sectionIndex, uint8[] v, bytes32[] r, bytes32[] s) returns(bool)
func (_CheckpointOracle *CheckpointOracleSession) SetCheckpoint(_recentNumber *big.Int, _recentHash [32]byte, _hash [32]byte, _sectionIndex uint64, v []uint8, r [][32]byte, s [][32]byte) (*types.Transaction, error) {
return _CheckpointOracle.Contract.SetCheckpoint(&_CheckpointOracle.TransactOpts, _recentNumber, _recentHash, _hash, _sectionIndex, v, r, s)
}
// SetCheckpoint is a paid mutator transaction binding the contract method 0xd459fc46.
//
// Solidity: function SetCheckpoint(uint256 _recentNumber, bytes32 _recentHash, bytes32 _hash, uint64 _sectionIndex, uint8[] v, bytes32[] r, bytes32[] s) returns(bool)
func (_CheckpointOracle *CheckpointOracleTransactorSession) SetCheckpoint(_recentNumber *big.Int, _recentHash [32]byte, _hash [32]byte, _sectionIndex uint64, v []uint8, r [][32]byte, s [][32]byte) (*types.Transaction, error) {
return _CheckpointOracle.Contract.SetCheckpoint(&_CheckpointOracle.TransactOpts, _recentNumber, _recentHash, _hash, _sectionIndex, v, r, s)
}
// CheckpointOracleNewCheckpointVoteIterator is returned from FilterNewCheckpointVote and is used to iterate over the raw logs and unpacked data for NewCheckpointVote events raised by the CheckpointOracle contract.
type CheckpointOracleNewCheckpointVoteIterator struct {
Event *CheckpointOracleNewCheckpointVote // 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 *CheckpointOracleNewCheckpointVoteIterator) 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(CheckpointOracleNewCheckpointVote)
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(CheckpointOracleNewCheckpointVote)
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 *CheckpointOracleNewCheckpointVoteIterator) Error() error {
return it.fail
}
// Close terminates the iteration process, releasing any pending underlying
// resources.
func (it *CheckpointOracleNewCheckpointVoteIterator) Close() error {
it.sub.Unsubscribe()
return nil
}
// CheckpointOracleNewCheckpointVote represents a NewCheckpointVote event raised by the CheckpointOracle contract.
type CheckpointOracleNewCheckpointVote struct {
Index uint64
CheckpointHash [32]byte
V uint8
R [32]byte
S [32]byte
Raw types.Log // Blockchain specific contextual infos
}
// FilterNewCheckpointVote is a free log retrieval operation binding the contract event 0xce51ffa16246bcaf0899f6504f473cd0114f430f566cef71ab7e03d3dde42a41.
//
// Solidity: event NewCheckpointVote(uint64 indexed index, bytes32 checkpointHash, uint8 v, bytes32 r, bytes32 s)
func (_CheckpointOracle *CheckpointOracleFilterer) FilterNewCheckpointVote(opts *bind.FilterOpts, index []uint64) (*CheckpointOracleNewCheckpointVoteIterator, error) {
var indexRule []interface{}
for _, indexItem := range index {
indexRule = append(indexRule, indexItem)
}
logs, sub, err := _CheckpointOracle.contract.FilterLogs(opts, "NewCheckpointVote", indexRule)
if err != nil {
return nil, err
}
return &CheckpointOracleNewCheckpointVoteIterator{contract: _CheckpointOracle.contract, event: "NewCheckpointVote", logs: logs, sub: sub}, nil
}
// WatchNewCheckpointVote is a free log subscription operation binding the contract event 0xce51ffa16246bcaf0899f6504f473cd0114f430f566cef71ab7e03d3dde42a41.
//
// Solidity: event NewCheckpointVote(uint64 indexed index, bytes32 checkpointHash, uint8 v, bytes32 r, bytes32 s)
func (_CheckpointOracle *CheckpointOracleFilterer) WatchNewCheckpointVote(opts *bind.WatchOpts, sink chan<- *CheckpointOracleNewCheckpointVote, index []uint64) (event.Subscription, error) {
var indexRule []interface{}
for _, indexItem := range index {
indexRule = append(indexRule, indexItem)
}
logs, sub, err := _CheckpointOracle.contract.WatchLogs(opts, "NewCheckpointVote", indexRule)
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(CheckpointOracleNewCheckpointVote)
if err := _CheckpointOracle.contract.UnpackLog(event, "NewCheckpointVote", 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
}
// ParseNewCheckpointVote is a log parse operation binding the contract event 0xce51ffa16246bcaf0899f6504f473cd0114f430f566cef71ab7e03d3dde42a41.
//
// Solidity: event NewCheckpointVote(uint64 indexed index, bytes32 checkpointHash, uint8 v, bytes32 r, bytes32 s)
func (_CheckpointOracle *CheckpointOracleFilterer) ParseNewCheckpointVote(log types.Log) (*CheckpointOracleNewCheckpointVote, error) {
event := new(CheckpointOracleNewCheckpointVote)
if err := _CheckpointOracle.contract.UnpackLog(event, "NewCheckpointVote", log); err != nil {
return nil, err
}
return event, nil
}

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pragma solidity ^0.5.10;
/**
* @title CheckpointOracle
* @author Gary Rong<garyrong@ethereum.org>, Martin Swende <martin.swende@ethereum.org>
* @dev Implementation of the blockchain checkpoint registrar.
*/
contract CheckpointOracle {
/*
Events
*/
// NewCheckpointVote is emitted when a new checkpoint proposal receives a vote.
event NewCheckpointVote(uint64 indexed index, bytes32 checkpointHash, uint8 v, bytes32 r, bytes32 s);
/*
Public Functions
*/
constructor(address[] memory _adminlist, uint _sectionSize, uint _processConfirms, uint _threshold) public {
for (uint i = 0; i < _adminlist.length; i++) {
admins[_adminlist[i]] = true;
adminList.push(_adminlist[i]);
}
sectionSize = _sectionSize;
processConfirms = _processConfirms;
threshold = _threshold;
}
/**
* @dev Get latest stable checkpoint information.
* @return section index
* @return checkpoint hash
* @return block height associated with checkpoint
*/
function GetLatestCheckpoint()
view
public
returns(uint64, bytes32, uint) {
return (sectionIndex, hash, height);
}
// SetCheckpoint sets a new checkpoint. It accepts a list of signatures
// @_recentNumber: a recent blocknumber, for replay protection
// @_recentHash : the hash of `_recentNumber`
// @_hash : the hash to set at _sectionIndex
// @_sectionIndex : the section index to set
// @v : the list of v-values
// @r : the list or r-values
// @s : the list of s-values
function SetCheckpoint(
uint _recentNumber,
bytes32 _recentHash,
bytes32 _hash,
uint64 _sectionIndex,
uint8[] memory v,
bytes32[] memory r,
bytes32[] memory s)
public
returns (bool)
{
// Ensure the sender is authorized.
require(admins[msg.sender]);
// These checks replay protection, so it cannot be replayed on forks,
// accidentally or intentionally
require(blockhash(_recentNumber) == _recentHash);
// Ensure the batch of signatures are valid.
require(v.length == r.length);
require(v.length == s.length);
// Filter out "future" checkpoint.
if (block.number < (_sectionIndex+1)*sectionSize+processConfirms) {
return false;
}
// Filter out "old" announcement
if (_sectionIndex < sectionIndex) {
return false;
}
// Filter out "stale" announcement
if (_sectionIndex == sectionIndex && (_sectionIndex != 0 || height != 0)) {
return false;
}
// Filter out "invalid" announcement
if (_hash == ""){
return false;
}
// EIP 191 style signatures
//
// Arguments when calculating hash to validate
// 1: byte(0x19) - the initial 0x19 byte
// 2: byte(0) - the version byte (data with intended validator)
// 3: this - the validator address
// -- Application specific data
// 4 : checkpoint section_index(uint64)
// 5 : checkpoint hash (bytes32)
// hash = keccak256(checkpoint_index, section_head, cht_root, bloom_root)
bytes32 signedHash = keccak256(abi.encodePacked(byte(0x19), byte(0), this, _sectionIndex, _hash));
address lastVoter = address(0);
// In order for us not to have to maintain a mapping of who has already
// voted, and we don't want to count a vote twice, the signatures must
// be submitted in strict ordering.
for (uint idx = 0; idx < v.length; idx++){
address signer = ecrecover(signedHash, v[idx], r[idx], s[idx]);
require(admins[signer]);
require(uint256(signer) > uint256(lastVoter));
lastVoter = signer;
emit NewCheckpointVote(_sectionIndex, _hash, v[idx], r[idx], s[idx]);
// Sufficient signatures present, update latest checkpoint.
if (idx+1 >= threshold){
hash = _hash;
height = block.number;
sectionIndex = _sectionIndex;
return true;
}
}
// We shouldn't wind up here, reverting un-emits the events
revert();
}
/**
* @dev Get all admin addresses
* @return address list
*/
function GetAllAdmin()
public
view
returns(address[] memory)
{
address[] memory ret = new address[](adminList.length);
for (uint i = 0; i < adminList.length; i++) {
ret[i] = adminList[i];
}
return ret;
}
/*
Fields
*/
// A map of admin users who have the permission to update CHT and bloom Trie root
mapping(address => bool) admins;
// A list of admin users so that we can obtain all admin users.
address[] adminList;
// Latest stored section id
uint64 sectionIndex;
// The block height associated with latest registered checkpoint.
uint height;
// The hash of latest registered checkpoint.
bytes32 hash;
// The frequency for creating a checkpoint
//
// The default value should be the same as the checkpoint size(32768) in the ethereum.
uint sectionSize;
// The number of confirmations needed before a checkpoint can be registered.
// We have to make sure the checkpoint registered will not be invalid due to
// chain reorg.
//
// The default value should be the same as the checkpoint process confirmations(256)
// in the ethereum.
uint processConfirms;
// The required signatures to finalize a stable checkpoint.
uint threshold;
}

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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package checkpointoracle is a an on-chain light client checkpoint oracle.
package checkpointoracle
//go:generate abigen --sol contract/oracle.sol --pkg contract --out contract/oracle.go
import (
"crypto/ecdsa"
"errors"
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/contracts/checkpointoracle/contract"
"github.com/ethereum/go-ethereum/core/types"
)
// CheckpointOracle is a Go wrapper around an on-chain light client checkpoint oracle.
type CheckpointOracle struct {
contract *contract.CheckpointOracle
}
// NewCheckpointOracle binds checkpoint contract and returns a registrar instance.
func NewCheckpointOracle(contractAddr common.Address, backend bind.ContractBackend) (*CheckpointOracle, error) {
c, err := contract.NewCheckpointOracle(contractAddr, backend)
if err != nil {
return nil, err
}
return &CheckpointOracle{contract: c}, nil
}
// Contract returns the underlying contract instance.
func (oracle *CheckpointOracle) Contract() *contract.CheckpointOracle {
return oracle.contract
}
// LookupCheckpointEvents searches checkpoint event for specific section in the
// given log batches.
func (oracle *CheckpointOracle) LookupCheckpointEvents(blockLogs [][]*types.Log, section uint64, hash common.Hash) []*contract.CheckpointOracleNewCheckpointVote {
var votes []*contract.CheckpointOracleNewCheckpointVote
for _, logs := range blockLogs {
for _, log := range logs {
event, err := oracle.contract.ParseNewCheckpointVote(*log)
if err != nil {
continue
}
if event.Index == section && common.Hash(event.CheckpointHash) == hash {
votes = append(votes, event)
}
}
}
return votes
}
// RegisterCheckpoint registers the checkpoint with a batch of associated signatures
// that are collected off-chain and sorted by lexicographical order.
//
// Notably all signatures given should be transformed to "ethereum style" which transforms
// v from 0/1 to 27/28 according to the yellow paper.
func (oracle *CheckpointOracle) RegisterCheckpoint(key *ecdsa.PrivateKey, index uint64, hash []byte, rnum *big.Int, rhash [32]byte, sigs [][]byte) (*types.Transaction, error) {
var (
r [][32]byte
s [][32]byte
v []uint8
)
for i := 0; i < len(sigs); i++ {
if len(sigs[i]) != 65 {
return nil, errors.New("invalid signature")
}
r = append(r, common.BytesToHash(sigs[i][:32]))
s = append(s, common.BytesToHash(sigs[i][32:64]))
v = append(v, sigs[i][64])
}
return oracle.contract.SetCheckpoint(bind.NewKeyedTransactor(key), rnum, rhash, common.BytesToHash(hash), index, v, r, s)
}

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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package checkpointoracle
import (
"bytes"
"crypto/ecdsa"
"encoding/binary"
"errors"
"math/big"
"reflect"
"sort"
"testing"
"time"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/accounts/abi/bind/backends"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/contracts/checkpointoracle/contract"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
)
var (
emptyHash = [32]byte{}
checkpoint0 = params.TrustedCheckpoint{
SectionIndex: 0,
SectionHead: common.HexToHash("0x7fa3c32f996c2bfb41a1a65b3d8ea3e0a33a1674cde43678ad6f4235e764d17d"),
CHTRoot: common.HexToHash("0x98fc5d3de23a0fecebad236f6655533c157d26a1aedcd0852a514dc1169e6350"),
BloomRoot: common.HexToHash("0x99b5adb52b337fe25e74c1c6d3835b896bd638611b3aebddb2317cce27a3f9fa"),
}
checkpoint1 = params.TrustedCheckpoint{
SectionIndex: 1,
SectionHead: common.HexToHash("0x2d4dee68102125e59b0cc61b176bd89f0d12b3b91cfaf52ef8c2c82fb920c2d2"),
CHTRoot: common.HexToHash("0x7d428008ece3b4c4ef5439f071930aad0bb75108d381308df73beadcd01ded95"),
BloomRoot: common.HexToHash("0x652571f7736de17e7bbb427ac881474da684c6988a88bf51b10cca9a2ee148f4"),
}
checkpoint2 = params.TrustedCheckpoint{
SectionIndex: 2,
SectionHead: common.HexToHash("0x61c0de578c0115b1dff8ef39aa600588c7c6ecb8a2f102003d7cf4c4146e9291"),
CHTRoot: common.HexToHash("0x407a08a407a2bc3838b74ca3eb206903c9c8a186ccf5ef14af07794efff1970b"),
BloomRoot: common.HexToHash("0x058b4161f558ce295a92925efc57f34f9210d5a30088d7475c183e0d3e58f5ac"),
}
)
var (
// The block frequency for creating checkpoint(only used in test)
sectionSize = big.NewInt(512)
// The number of confirmations needed to generate a checkpoint(only used in test).
processConfirms = big.NewInt(4)
)
// validateOperation executes the operation, watches and delivers all events fired by the backend and ensures the
// correctness by assert function.
func validateOperation(t *testing.T, c *contract.CheckpointOracle, backend *backends.SimulatedBackend, operation func(),
assert func(<-chan *contract.CheckpointOracleNewCheckpointVote) error, opName string) {
// Watch all events and deliver them to assert function
var (
sink = make(chan *contract.CheckpointOracleNewCheckpointVote)
sub, _ = c.WatchNewCheckpointVote(nil, sink, nil)
)
defer func() {
// Close all subscribers
sub.Unsubscribe()
}()
operation()
// flush pending block
backend.Commit()
if err := assert(sink); err != nil {
t.Errorf("operation {%s} failed, err %s", opName, err)
}
}
// validateEvents checks that the correct number of contract events
// fired by contract backend.
func validateEvents(target int, sink interface{}) (bool, []reflect.Value) {
chanval := reflect.ValueOf(sink)
chantyp := chanval.Type()
if chantyp.Kind() != reflect.Chan || chantyp.ChanDir()&reflect.RecvDir == 0 {
return false, nil
}
count := 0
var recv []reflect.Value
timeout := time.After(1 * time.Second)
cases := []reflect.SelectCase{{Chan: chanval, Dir: reflect.SelectRecv}, {Chan: reflect.ValueOf(timeout), Dir: reflect.SelectRecv}}
for {
chose, v, _ := reflect.Select(cases)
if chose == 1 {
// Not enough event received
return false, nil
}
count += 1
recv = append(recv, v)
if count == target {
break
}
}
done := time.After(50 * time.Millisecond)
cases = cases[:1]
cases = append(cases, reflect.SelectCase{Chan: reflect.ValueOf(done), Dir: reflect.SelectRecv})
chose, _, _ := reflect.Select(cases)
// If chose equal 0, it means receiving redundant events.
return chose == 1, recv
}
func signCheckpoint(addr common.Address, privateKey *ecdsa.PrivateKey, index uint64, hash common.Hash) []byte {
// EIP 191 style signatures
//
// Arguments when calculating hash to validate
// 1: byte(0x19) - the initial 0x19 byte
// 2: byte(0) - the version byte (data with intended validator)
// 3: this - the validator address
// -- Application specific data
// 4 : checkpoint section_index(uint64)
// 5 : checkpoint hash (bytes32)
// hash = keccak256(checkpoint_index, section_head, cht_root, bloom_root)
buf := make([]byte, 8)
binary.BigEndian.PutUint64(buf, index)
data := append([]byte{0x19, 0x00}, append(addr.Bytes(), append(buf, hash.Bytes()...)...)...)
sig, _ := crypto.Sign(crypto.Keccak256(data), privateKey)
sig[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper
return sig
}
// assertSignature verifies whether the recovered signers are equal with expected.
func assertSignature(addr common.Address, index uint64, hash [32]byte, r, s [32]byte, v uint8, expect common.Address) bool {
buf := make([]byte, 8)
binary.BigEndian.PutUint64(buf, index)
data := append([]byte{0x19, 0x00}, append(addr.Bytes(), append(buf, hash[:]...)...)...)
pubkey, err := crypto.Ecrecover(crypto.Keccak256(data), append(r[:], append(s[:], v-27)...))
if err != nil {
return false
}
var signer common.Address
copy(signer[:], crypto.Keccak256(pubkey[1:])[12:])
return bytes.Equal(signer.Bytes(), expect.Bytes())
}
type Account struct {
key *ecdsa.PrivateKey
addr common.Address
}
type Accounts []Account
func (a Accounts) Len() int { return len(a) }
func (a Accounts) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a Accounts) Less(i, j int) bool { return bytes.Compare(a[i].addr.Bytes(), a[j].addr.Bytes()) < 0 }
func TestCheckpointRegister(t *testing.T) {
// Initialize test accounts
var accounts Accounts
for i := 0; i < 3; i++ {
key, _ := crypto.GenerateKey()
addr := crypto.PubkeyToAddress(key.PublicKey)
accounts = append(accounts, Account{key: key, addr: addr})
}
sort.Sort(accounts)
// Deploy registrar contract
transactOpts := bind.NewKeyedTransactor(accounts[0].key)
contractBackend := backends.NewSimulatedBackend(core.GenesisAlloc{accounts[0].addr: {Balance: big.NewInt(1000000000)}, accounts[1].addr: {Balance: big.NewInt(1000000000)}, accounts[2].addr: {Balance: big.NewInt(1000000000)}}, 10000000)
// 3 trusted signers, threshold 2
contractAddr, _, c, err := contract.DeployCheckpointOracle(transactOpts, contractBackend, []common.Address{accounts[0].addr, accounts[1].addr, accounts[2].addr}, sectionSize, processConfirms, big.NewInt(2))
if err != nil {
t.Error("Failed to deploy registrar contract", err)
}
contractBackend.Commit()
// getRecent returns block height and hash of the head parent.
getRecent := func() (*big.Int, common.Hash) {
parentNumber := new(big.Int).Sub(contractBackend.Blockchain().CurrentHeader().Number, big.NewInt(1))
parentHash := contractBackend.Blockchain().CurrentHeader().ParentHash
return parentNumber, parentHash
}
// collectSig generates specified number signatures.
collectSig := func(index uint64, hash common.Hash, n int, unauthorized *ecdsa.PrivateKey) (v []uint8, r [][32]byte, s [][32]byte) {
for i := 0; i < n; i++ {
sig := signCheckpoint(contractAddr, accounts[i].key, index, hash)
if unauthorized != nil {
sig = signCheckpoint(contractAddr, unauthorized, index, hash)
}
r = append(r, common.BytesToHash(sig[:32]))
s = append(s, common.BytesToHash(sig[32:64]))
v = append(v, sig[64])
}
return v, r, s
}
// insertEmptyBlocks inserts a batch of empty blocks to blockchain.
insertEmptyBlocks := func(number int) {
for i := 0; i < number; i++ {
contractBackend.Commit()
}
}
// assert checks whether the current contract status is same with
// the expected.
assert := func(index uint64, hash [32]byte, height *big.Int) error {
lindex, lhash, lheight, err := c.GetLatestCheckpoint(nil)
if err != nil {
return err
}
if lindex != index {
return errors.New("latest checkpoint index mismatch")
}
if !bytes.Equal(lhash[:], hash[:]) {
return errors.New("latest checkpoint hash mismatch")
}
if lheight.Cmp(height) != 0 {
return errors.New("latest checkpoint height mismatch")
}
return nil
}
// Test future checkpoint registration
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(0, checkpoint0.Hash(), 2, nil)
c.SetCheckpoint(transactOpts, number, hash, checkpoint0.Hash(), 0, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
return assert(0, emptyHash, big.NewInt(0))
}, "test future checkpoint registration")
insertEmptyBlocks(int(sectionSize.Uint64() + processConfirms.Uint64()))
// Test transaction replay protection
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(0, checkpoint0.Hash(), 2, nil)
hash = common.HexToHash("deadbeef")
c.SetCheckpoint(transactOpts, number, hash, checkpoint0.Hash(), 0, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
return assert(0, emptyHash, big.NewInt(0))
}, "test transaction replay protection")
// Test unauthorized signature checking
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
u, _ := crypto.GenerateKey()
v, r, s := collectSig(0, checkpoint0.Hash(), 2, u)
c.SetCheckpoint(transactOpts, number, hash, checkpoint0.Hash(), 0, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
return assert(0, emptyHash, big.NewInt(0))
}, "test unauthorized signature checking")
// Test un-multi-signature checkpoint registration
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(0, checkpoint0.Hash(), 1, nil)
c.SetCheckpoint(transactOpts, number, hash, checkpoint0.Hash(), 0, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
return assert(0, emptyHash, big.NewInt(0))
}, "test un-multi-signature checkpoint registration")
// Test valid checkpoint registration
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(0, checkpoint0.Hash(), 2, nil)
c.SetCheckpoint(transactOpts, number, hash, checkpoint0.Hash(), 0, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
if valid, recv := validateEvents(2, events); !valid {
return errors.New("receive incorrect number of events")
} else {
for i := 0; i < len(recv); i++ {
event := recv[i].Interface().(*contract.CheckpointOracleNewCheckpointVote)
if !assertSignature(contractAddr, event.Index, event.CheckpointHash, event.R, event.S, event.V, accounts[i].addr) {
return errors.New("recover signer failed")
}
}
}
number, _ := getRecent()
return assert(0, checkpoint0.Hash(), number.Add(number, big.NewInt(1)))
}, "test valid checkpoint registration")
distance := 3*sectionSize.Uint64() + processConfirms.Uint64() - contractBackend.Blockchain().CurrentHeader().Number.Uint64()
insertEmptyBlocks(int(distance))
// Test uncontinuous checkpoint registration
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(2, checkpoint2.Hash(), 2, nil)
c.SetCheckpoint(transactOpts, number, hash, checkpoint2.Hash(), 2, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
if valid, recv := validateEvents(2, events); !valid {
return errors.New("receive incorrect number of events")
} else {
for i := 0; i < len(recv); i++ {
event := recv[i].Interface().(*contract.CheckpointOracleNewCheckpointVote)
if !assertSignature(contractAddr, event.Index, event.CheckpointHash, event.R, event.S, event.V, accounts[i].addr) {
return errors.New("recover signer failed")
}
}
}
number, _ := getRecent()
return assert(2, checkpoint2.Hash(), number.Add(number, big.NewInt(1)))
}, "test uncontinuous checkpoint registration")
// Test old checkpoint registration
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(1, checkpoint1.Hash(), 2, nil)
c.SetCheckpoint(transactOpts, number, hash, checkpoint1.Hash(), 1, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
number, _ := getRecent()
return assert(2, checkpoint2.Hash(), number)
}, "test uncontinuous checkpoint registration")
// Test stale checkpoint registration
validateOperation(t, c, contractBackend, func() {
number, hash := getRecent()
v, r, s := collectSig(2, checkpoint2.Hash(), 2, nil)
c.SetCheckpoint(transactOpts, number, hash, checkpoint2.Hash(), 2, v, r, s)
}, func(events <-chan *contract.CheckpointOracleNewCheckpointVote) error {
number, _ := getRecent()
return assert(2, checkpoint2.Hash(), number.Sub(number, big.NewInt(1)))
}, "test stale checkpoint registration")
}