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288 lines
9.6 KiB
288 lines
9.6 KiB
package explorer
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import (
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"context"
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"encoding/json"
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"fmt"
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"math/big"
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"net"
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"net/http"
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"strconv"
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"time"
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ethCommon "github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/gorilla/mux"
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msg_pb "github.com/harmony-one/harmony/api/proto/message"
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"github.com/harmony-one/harmony/api/service/syncing"
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"github.com/harmony-one/harmony/core"
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"github.com/harmony-one/harmony/internal/chain"
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"github.com/harmony-one/harmony/internal/common"
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"github.com/harmony-one/harmony/internal/utils"
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"github.com/harmony-one/harmony/numeric"
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"github.com/harmony-one/harmony/p2p"
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stakingReward "github.com/harmony-one/harmony/staking/reward"
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)
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// Constants for explorer service.
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const (
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explorerPortDifference = 4000
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defaultPageSize = "1000"
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maxAddresses = 100000
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)
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// HTTPError is an HTTP error.
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type HTTPError struct {
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Code int
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Msg string
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}
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// Service is the struct for explorer service.
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type Service struct {
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router *mux.Router
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IP string
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Port string
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Storage *Storage
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server *http.Server
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messageChan chan *msg_pb.Message
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stateSync *syncing.StateSync
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blockchain *core.BlockChain
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}
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// New returns explorer service.
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func New(selfPeer *p2p.Peer, ss *syncing.StateSync, bc *core.BlockChain) *Service {
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return &Service{IP: selfPeer.IP, Port: selfPeer.Port, stateSync: ss, blockchain: bc}
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}
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// StartService starts explorer service.
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func (s *Service) StartService() {
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utils.Logger().Info().Msg("Starting explorer service.")
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s.Init()
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s.server = s.Run()
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}
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// StopService shutdowns explorer service.
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func (s *Service) StopService() {
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utils.Logger().Info().Msg("Shutting down explorer service.")
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if err := s.server.Shutdown(context.Background()); err != nil {
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utils.Logger().Error().Err(err).Msg("Error when shutting down explorer server")
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} else {
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utils.Logger().Info().Msg("Shutting down explorer server successfully")
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}
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}
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// GetExplorerPort returns the port serving explorer dashboard. This port is explorerPortDifference less than the node port.
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func GetExplorerPort(nodePort string) string {
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if port, err := strconv.Atoi(nodePort); err == nil {
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return fmt.Sprintf("%d", port-explorerPortDifference)
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}
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utils.Logger().Error().Msg("error on parsing.")
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return ""
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}
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// Init is to initialize for ExplorerService.
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func (s *Service) Init() {
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s.Storage = GetStorageInstance(s.IP, s.Port)
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}
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// Run is to run serving explorer.
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func (s *Service) Run() *http.Server {
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// Init address.
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port := GetExplorerPort(s.Port)
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addr := net.JoinHostPort("", port)
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s.router = mux.NewRouter()
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// Set up router for addresses.
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// Fetch addresses request, accepts parameter size: how much addresses to read,
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// parameter prefix: from which address prefix start
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s.router.Path("/addresses").Queries("size", "{[0-9]*?}", "prefix", "{[a-zA-Z0-9]*?}").HandlerFunc(s.GetAddresses).Methods("GET")
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s.router.Path("/addresses").HandlerFunc(s.GetAddresses)
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// Set up router for supply info
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s.router.Path("/burn-addresses").Queries().HandlerFunc(s.GetInaccessibleAddressInfo).Methods("GET")
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s.router.Path("/burn-addresses").HandlerFunc(s.GetInaccessibleAddressInfo)
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s.router.Path("/circulating-supply").Queries().HandlerFunc(s.GetCirculatingSupply).Methods("GET")
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s.router.Path("/circulating-supply").HandlerFunc(s.GetCirculatingSupply)
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s.router.Path("/total-supply").Queries().HandlerFunc(s.GetTotalSupply).Methods("GET")
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s.router.Path("/total-supply").HandlerFunc(s.GetTotalSupply)
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// Set up router for node health check.
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s.router.Path("/node-sync").Queries().HandlerFunc(s.GetNodeSync).Methods("GET")
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s.router.Path("/node-sync").HandlerFunc(s.GetNodeSync)
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// Do serving now.
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utils.Logger().Info().Str("port", GetExplorerPort(s.Port)).Msg("[Explorer] Server started.")
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server := &http.Server{
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Addr: addr,
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Handler: s.router,
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ReadTimeout: 5 * time.Second,
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WriteTimeout: 10 * time.Second,
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IdleTimeout: 120 * time.Second,
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}
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go func() {
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defer func() { utils.Logger().Debug().Msg("[Explorer] Server closed.") }()
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if err := server.ListenAndServe(); err != nil {
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utils.Logger().Warn().Err(err).Msg("[Explorer] Server error.")
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}
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}()
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return server
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}
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// GetAddresses serves end-point /addresses, returns size of addresses from address with prefix.
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func (s *Service) GetAddresses(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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sizeStr := r.FormValue("size")
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prefix := r.FormValue("prefix")
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if sizeStr == "" {
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sizeStr = defaultPageSize
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}
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data := &Data{}
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defer func() {
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if err := json.NewEncoder(w).Encode(data.Addresses); err != nil {
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utils.Logger().Warn().Err(err).Msg("cannot JSON-encode addresses")
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}
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}()
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size, err := strconv.Atoi(sizeStr)
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if err != nil || size > maxAddresses {
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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data.Addresses, err = s.Storage.GetAddresses(size, prefix)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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utils.Logger().Warn().Err(err).Msg("wasn't able to fetch addresses from storage")
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return
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}
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}
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var (
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// InaccessibleAddresses are a list of known eth addresses that cannot spend ONE tokens.
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InaccessibleAddresses = []ethCommon.Address{
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// one10000000000000000000000000000dead5shlag
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ethCommon.HexToAddress("0x7bDeF7Bdef7BDeF7BDEf7bDef7bdef7bdeF6E7AD"),
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}
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)
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// InaccessibleAddressInfo ..
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type InaccessibleAddressInfo struct {
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EthAddress ethCommon.Address `json:"eth-address"`
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Address string `json:"address"`
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Balance numeric.Dec `json:"balance"`
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Nonce uint64 `json:"nonce"`
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}
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// getAllInaccessibleAddresses information according to InaccessibleAddresses
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func (s *Service) getAllInaccessibleAddresses() ([]*InaccessibleAddressInfo, error) {
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state, err := s.blockchain.StateAt(s.blockchain.CurrentHeader().Root())
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if err != nil {
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return nil, err
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}
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accs := []*InaccessibleAddressInfo{}
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for _, addr := range InaccessibleAddresses {
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accs = append(accs, &InaccessibleAddressInfo{
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EthAddress: addr,
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Address: common.MustAddressToBech32(addr),
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Balance: numeric.NewDecFromBigIntWithPrec(state.GetBalance(addr), 18),
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Nonce: state.GetNonce(addr),
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})
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}
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return accs, nil
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}
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// getTotalInaccessibleTokens in ONE at the latest header.
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func (s *Service) getTotalInaccessibleTokens() (numeric.Dec, error) {
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addrInfos, err := s.getAllInaccessibleAddresses()
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if err != nil {
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return numeric.Dec{}, err
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}
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total := numeric.NewDecFromBigIntWithPrec(big.NewInt(0), 18)
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for _, addr := range addrInfos {
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total = total.Add(addr.Balance)
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}
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return total, nil
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}
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// GetInaccessibleAddressInfo serves /burn-addresses end-point.
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func (s *Service) GetInaccessibleAddressInfo(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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accInfos, err := s.getAllInaccessibleAddresses()
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if err != nil {
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utils.Logger().Warn().Err(err).Msg("unable to fetch inaccessible addresses")
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w.WriteHeader(http.StatusInternalServerError)
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}
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if err := json.NewEncoder(w).Encode(accInfos); err != nil {
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utils.Logger().Warn().Msg("cannot JSON-encode inaccessible account info")
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w.WriteHeader(http.StatusInternalServerError)
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}
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}
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// GetCirculatingSupply serves /circulating-supply end-point.
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// Note that known InaccessibleAddresses have their funds removed from the supply for this endpoint.
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func (s *Service) GetCirculatingSupply(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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circulatingSupply, err := chain.GetCirculatingSupply(context.Background(), s.blockchain)
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if err != nil {
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utils.Logger().Warn().Err(err).Msg("unable to fetch circulating supply")
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w.WriteHeader(http.StatusInternalServerError)
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}
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totalInaccessible, err := s.getTotalInaccessibleTokens()
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if err != nil {
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utils.Logger().Warn().Err(err).Msg("unable to fetch inaccessible tokens")
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w.WriteHeader(http.StatusInternalServerError)
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}
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if err := json.NewEncoder(w).Encode(circulatingSupply.Sub(totalInaccessible)); err != nil {
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utils.Logger().Warn().Msg("cannot JSON-encode circulating supply")
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w.WriteHeader(http.StatusInternalServerError)
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}
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}
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// GetTotalSupply serves /total-supply end-point.
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// Note that known InaccessibleAddresses have their funds removed from the supply for this endpoint.
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func (s *Service) GetTotalSupply(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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totalSupply, err := stakingReward.GetTotalTokens(s.blockchain)
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if err != nil {
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utils.Logger().Warn().Err(err).Msg("unable to fetch total supply")
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w.WriteHeader(http.StatusInternalServerError)
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}
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totalInaccessible, err := s.getTotalInaccessibleTokens()
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if err != nil {
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utils.Logger().Warn().Err(err).Msg("unable to fetch inaccessible tokens")
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w.WriteHeader(http.StatusInternalServerError)
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}
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if err := json.NewEncoder(w).Encode(totalSupply.Sub(totalInaccessible)); err != nil {
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utils.Logger().Warn().Msg("cannot JSON-encode total supply")
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w.WriteHeader(http.StatusInternalServerError)
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}
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}
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// GetNodeSync returns status code 500 if node is not in sync
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func (s *Service) GetNodeSync(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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sync := !s.stateSync.IsOutOfSync(s.blockchain, false)
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if !sync {
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w.WriteHeader(http.StatusTeapot)
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}
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if err := json.NewEncoder(w).Encode(sync); err != nil {
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utils.Logger().Warn().Msg("cannot JSON-encode total supply")
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w.WriteHeader(http.StatusInternalServerError)
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}
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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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// 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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