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package types
import (
"encoding/json"
"fmt"
"sync"
"github.com/tendermint/go-crypto"
"github.com/tendermint/go-event-meter"
"github.com/tendermint/go-events"
client "github.com/tendermint/go-rpc/client"
"github.com/tendermint/go-wire"
ctypes "github.com/tendermint/tendermint/rpc/core/types"
tmtypes "github.com/tendermint/tendermint/types"
)
//------------------------------------------------
// validator types
//------------------------------------------------
//------------------------------------------------
// simple validator set and validator (just crypto, no network)
// validator set (independent of chains)
type ValidatorSet struct {
ID string `json:"id"`
Validators []*Validator `json:"validators"`
}
func (vs *ValidatorSet) Validator(valID string) (*Validator, error) {
for _, v := range vs.Validators {
if v.ID == valID {
return v, nil
}
}
return nil, fmt.Errorf("Unknwon validator %s", valID)
}
// validator (independent of chain)
type Validator struct {
ID string `json:"id"`
PubKey crypto.PubKey `json:"pub_key"`
Chains []string `json:"chains,omitempty"` // TODO: put this elsewhere (?)
}
//------------------------------------------------
// Live validator on a chain
// Validator on a chain
// Returned over RPC but also used to manage state
// Responsible for communication with the validator
type ValidatorState struct {
Config *ValidatorConfig `json:"config"`
Status *ValidatorStatus `json:"status"`
// Currently we get IPs and dial,
// but should reverse so the nodes dial the netmon,
// both for node privacy and easier reconfig (validators changing ip/port)
em *eventmeter.EventMeter // holds a ws connection to the val
client *client.ClientURI // rpc client
}
// Start a new event meter, including the websocket connection
// Also create the http rpc client for convenienve
func (vs *ValidatorState) Start() error {
// we need the lock because RPCAddr can be updated concurrently
vs.Config.mtx.Lock()
rpcAddr := vs.Config.RPCAddr
vs.Config.mtx.Unlock()
em := eventmeter.NewEventMeter(fmt.Sprintf("ws://%s/websocket", rpcAddr), UnmarshalEvent)
if err := em.Start(); err != nil {
return err
}
vs.em = em
vs.client = client.NewClientURI(fmt.Sprintf("http://%s", rpcAddr))
return nil
}
func (vs *ValidatorState) Stop() {
vs.em.Stop()
}
func (vs *ValidatorState) EventMeter() *eventmeter.EventMeter {
return vs.em
}
func (vs *ValidatorState) NewBlock(block *tmtypes.Block) {
vs.Status.mtx.Lock()
defer vs.Status.mtx.Unlock()
vs.Status.BlockHeight = block.Header.Height
}
func (vs *ValidatorState) UpdateLatency(latency float64) float64 {
vs.Status.mtx.Lock()
defer vs.Status.mtx.Unlock()
old := vs.Status.Latency
vs.Status.Latency = latency
return old
}
func (vs *ValidatorState) SetOnline(isOnline bool) {
vs.Status.mtx.Lock()
defer vs.Status.mtx.Unlock()
vs.Status.Online = isOnline
}
// Return the validators pubkey. If it's not yet set, get it from the node
// TODO: proof that it's the node's key
// XXX: Is this necessary? Why would it not be set
func (vs *ValidatorState) PubKey() crypto.PubKey {
if vs.Config.Validator.PubKey != nil {
return vs.Config.Validator.PubKey
}
var result ctypes.TMResult
_, err := vs.client.Call("status", nil, &result)
if err != nil {
log.Error("Error getting validator pubkey", "addr", vs.Config.RPCAddr, "val", vs.Config.Validator.ID, "error", err)
return nil
}
status := result.(*ctypes.ResultStatus)
vs.Config.Validator.PubKey = status.PubKey
return vs.Config.Validator.PubKey
}
type ValidatorConfig struct {
mtx sync.Mutex
Validator *Validator `json:"validator"`
P2PAddr string `json:"p2p_addr"`
RPCAddr string `json:"rpc_addr"`
Index int `json:"index,omitempty"`
}
// TODO: update p2p address
func (vc *ValidatorConfig) UpdateRPCAddress(rpcAddr string) {
vc.mtx.Lock()
defer vc.mtx.Unlock()
vc.RPCAddr = rpcAddr
}
type ValidatorStatus struct {
mtx sync.Mutex
Online bool `json:"online"`
Latency float64 `json:"latency" wire:"unsafe"`
BlockHeight int `json:"block_height"`
}
//---------------------------------------------------
// utilities
// Unmarshal a json event
func UnmarshalEvent(b json.RawMessage) (string, events.EventData, error) {
var err error
result := new(ctypes.TMResult)
wire.ReadJSONPtr(result, b, &err)
if err != nil {
return "", nil, err
}
event, ok := (*result).(*ctypes.ResultEvent)
if !ok {
return "", nil, nil // TODO: handle non-event messages (ie. return from subscribe/unsubscribe)
// fmt.Errorf("Result is not type *ctypes.ResultEvent. Got %v", reflect.TypeOf(*result))
}
return event.Name, event.Data, nil
}