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package staking
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import (
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"math/big"
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"strings"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/rpc"
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protobuf "github.com/golang/protobuf/proto"
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"github.com/harmony-one/bls/ffi/go/bls"
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"github.com/harmony-one/harmony/accounts"
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"github.com/harmony-one/harmony/accounts/abi"
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proto "github.com/harmony-one/harmony/api/client/service/proto"
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proto_common "github.com/harmony-one/harmony/api/proto"
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"github.com/harmony-one/harmony/api/proto/message"
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msg_pb "github.com/harmony-one/harmony/api/proto/message"
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"github.com/harmony-one/harmony/common/denominations"
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"github.com/harmony-one/harmony/contracts"
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"github.com/harmony-one/harmony/core"
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"github.com/harmony-one/harmony/core/types"
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common2 "github.com/harmony-one/harmony/internal/common"
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"github.com/harmony-one/harmony/internal/ctxerror"
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"github.com/harmony-one/harmony/internal/genesis"
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hmykey "github.com/harmony-one/harmony/internal/keystore"
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"github.com/harmony-one/harmony/internal/utils"
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"github.com/harmony-one/harmony/p2p"
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"github.com/harmony-one/harmony/p2p/host"
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)
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const (
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// WaitTime is the delay time for resending staking transaction if the previous transaction did not get approved.
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WaitTime = 5 * time.Second
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// StakingContractAddress is the staking deployed contract address
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StakingContractAddress = "TODO(minhdoan): Create a PR to generate staking contract address"
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// StakingAmount is the amount of stake to put
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StakingAmount = 10
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)
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// State is the state of staking service.
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type State byte
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// Service is the staking service.
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// Service requires private key here which is not a right design.
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// In stead in the right design, the end-user who runs mining needs to provide signed tx to this service.
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type Service struct {
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host p2p.Host
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stopChan chan struct{}
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stoppedChan chan struct{}
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account accounts.Account
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blsPublicKey *bls.PublicKey
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stakingAmount int64
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state State
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beaconChain *core.BlockChain
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messageChan chan *msg_pb.Message
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}
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// New returns staking service.
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func New(host p2p.Host, account accounts.Account, beaconChain *core.BlockChain, blsPublicKey *bls.PublicKey) *Service {
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return &Service{
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host: host,
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stopChan: make(chan struct{}),
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stoppedChan: make(chan struct{}),
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blsPublicKey: blsPublicKey,
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stakingAmount: StakingAmount,
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beaconChain: beaconChain,
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}
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}
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// StartService starts staking service.
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func (s *Service) StartService() {
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log.Info("Start Staking Service")
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s.Run()
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}
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// Run runs staking.
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func (s *Service) Run() {
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tick := time.NewTicker(WaitTime)
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go func() {
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defer close(s.stoppedChan)
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// Do service first time and after that doing it every 5 minutes.
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// The reason we have to do it in every x minutes because of beacon chain syncing.
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time.Sleep(WaitTime)
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s.DoService()
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for {
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select {
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case <-tick.C:
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if s.IsStaked() {
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return
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}
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//s.DoService()
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return
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case <-s.stopChan:
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return
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}
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}
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}()
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}
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// IsStaked checks if the txn gets accepted and approved in the beacon chain.
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func (s *Service) IsStaked() bool {
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return false
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}
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// DoService does staking.
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func (s *Service) DoService() {
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utils.GetLogInstance().Info("Trying to send a staking transaction.")
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// TODO: no need to sync beacon chain to stake
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//if s.beaconChain == nil {
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// utils.GetLogInstance().Info("Can not send a staking transaction because of nil beacon chain.")
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// return
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//}
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if msg := s.createStakingMessage(); msg == nil {
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utils.GetLogInstance().Error("Can not create staking transaction")
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} else if err := s.host.SendMessageToGroups([]p2p.GroupID{p2p.GroupIDBeacon}, host.ConstructP2pMessage(byte(17), msg)); err != nil {
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ctxerror.Warn(utils.GetLogger(), err, "cannot send staking message")
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} else {
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utils.GetLogInstance().Info("Sent staking transaction to the network.")
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}
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}
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func (s *Service) getStakingInfo() *proto.StakingContractInfoResponse {
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address := s.account.Address
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state, err := s.beaconChain.State()
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if err != nil {
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utils.GetLogInstance().Error("error to get beacon chain state when getting staking info")
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return nil
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}
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balance := state.GetBalance(address)
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if balance == common.Big0 {
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utils.GetLogInstance().Error("account balance empty when getting staking info")
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return nil
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}
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nonce := state.GetNonce(address)
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if nonce == 0 {
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utils.GetLogInstance().Error("nonce zero when getting staking info")
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return nil
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}
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return &proto.StakingContractInfoResponse{
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ContractAddress: StakingContractAddress,
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Balance: balance.Bytes(),
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Nonce: nonce,
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}
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}
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func (s *Service) getFakeStakingInfo() *proto.StakingContractInfoResponse {
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balance := big.NewInt(denominations.One)
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nonce := uint64(0) // TODO: make it a incrementing field
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priKey := genesis.GenesisBeaconAccountPriKey
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contractAddress := crypto.PubkeyToAddress(priKey.PublicKey)
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stakingContractAddress := crypto.CreateAddress(contractAddress, uint64(nonce))
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return &proto.StakingContractInfoResponse{
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ContractAddress: common2.MustAddressToBech32(stakingContractAddress),
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Balance: balance.Bytes(),
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Nonce: nonce,
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}
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}
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// Constructs the staking message
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func constructStakingMessage(ts types.Transactions) []byte {
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tsBytes, err := rlp.EncodeToBytes(ts)
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if err == nil {
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msg := &message.Message{
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Type: message.MessageType_NEWNODE_BEACON_STAKING,
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Request: &message.Message_Staking{
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Staking: &message.StakingRequest{
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Transaction: tsBytes,
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NodeId: "",
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},
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},
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}
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if data, err := protobuf.Marshal(msg); err == nil {
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return data
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}
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}
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utils.GetLogInstance().Error("Error when creating staking message", "error", err)
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return nil
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}
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func (s *Service) createRawStakingMessage() []byte {
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// TODO(minhdoan): Enable getStakingInfo back after testing.
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stakingInfo := s.getFakeStakingInfo()
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toAddress := common2.ParseAddr(stakingInfo.ContractAddress)
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abi, err := abi.JSON(strings.NewReader(contracts.StakeLockContractABI))
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if err != nil {
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utils.GetLogInstance().Error("Failed to generate staking contract's ABI", "error", err)
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}
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// TODO: the bls address should be signed by the bls private key
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blsPubKeyBytes := s.blsPublicKey.Serialize()
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if len(blsPubKeyBytes) != 96 {
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utils.GetLogInstance().Error("Wrong bls pubkey size", "size", len(blsPubKeyBytes))
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return []byte{}
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}
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blsPubKeyPart1 := [32]byte{}
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blsPubKeyPart2 := [32]byte{}
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blsPubKeyPart3 := [32]byte{}
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copy(blsPubKeyPart1[:], blsPubKeyBytes[:32])
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copy(blsPubKeyPart2[:], blsPubKeyBytes[32:64])
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copy(blsPubKeyPart3[:], blsPubKeyBytes[64:96])
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bytesData, err := abi.Pack("lock", blsPubKeyPart1, blsPubKeyPart2, blsPubKeyPart3)
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if err != nil {
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utils.GetLogInstance().Error("Failed to generate ABI function bytes data", "error", err)
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}
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tx := types.NewTransaction(
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stakingInfo.Nonce,
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toAddress,
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0,
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big.NewInt(s.stakingAmount),
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params.TxGas*10,
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nil,
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bytesData,
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)
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// This is currently not called.
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hmykey.Unlock(s.account)
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if signedTx, err := hmykey.SignTx(s.account, tx); err == nil {
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ts := types.Transactions{signedTx}
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return constructStakingMessage(ts)
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}
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return nil
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}
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func (s *Service) createStakingMessage() []byte {
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if msg := s.createRawStakingMessage(); msg != nil {
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return proto_common.ConstructStakingMessage(msg)
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}
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return nil
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}
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// StopService stops staking service.
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func (s *Service) StopService() {
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utils.GetLogInstance().Info("Stopping staking service.")
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s.stopChan <- struct{}{}
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<-s.stoppedChan
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utils.GetLogInstance().Info("Role conversion stopped.")
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}
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// NotifyService notify service
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func (s *Service) NotifyService(params map[string]interface{}) {
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return
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}
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// SetMessageChan sets up message channel to service.
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func (s *Service) SetMessageChan(messageChan chan *msg_pb.Message) {
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s.messageChan = messageChan
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}
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// APIs for the services.
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func (s *Service) APIs() []rpc.API {
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return nil
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}
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