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beacon.go
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beacon.go
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// Package beacon implements the beacon introspection debug sub-commands.
package beacon
import (
"context"
"encoding/json"
"fmt"
"os"
"github.com/spf13/cobra"
"google.golang.org/grpc"
beacon "github.com/oasisprotocol/oasis-core/go/beacon/api"
"github.com/oasisprotocol/oasis-core/go/common/logging"
consensus "github.com/oasisprotocol/oasis-core/go/consensus/api"
cmdCommon "github.com/oasisprotocol/oasis-core/go/oasis-node/cmd/common"
cmdGrpc "github.com/oasisprotocol/oasis-core/go/oasis-node/cmd/common/grpc"
)
var (
beaconCmd = &cobra.Command{
Use: "beacon",
Short: "debug the random beacon",
}
beaconStatusCmd = &cobra.Command{
Use: "status",
Short: "query beacon status",
Run: doBeaconStatus,
}
logger = logging.GetLogger("cmd/debug/beacon")
)
func doConnect(cmd *cobra.Command) (*grpc.ClientConn, beacon.Backend) {
if err := cmdCommon.Init(); err != nil {
cmdCommon.EarlyLogAndExit(err)
}
conn, err := cmdGrpc.NewClient(cmd)
if err != nil {
logger.Error("failed to establish connection with node",
"err", err,
)
os.Exit(1)
}
client := beacon.NewBeaconClient(conn)
return conn, client
}
func doBeaconStatus(cmd *cobra.Command, args []string) {
conn, client := doConnect(cmd)
defer conn.Close()
logger.Info("querying latest beacon")
b, err := client.GetBeacon(context.Background(), consensus.HeightLatest)
if err != nil {
logger.Error("failed to query beacon",
"err", err,
)
os.Exit(1)
}
// I'm going to be sad if people use this as a way to programatically
// scrape the beacon. Oh well.
prettyOut := struct {
Beacon []byte
State *beacon.PVSSState
}{
Beacon: b,
}
pvssClient, ok := client.(beacon.PVSSBackend)
if ok {
prettyOut.State, err = pvssClient.GetPVSSState(context.Background(), consensus.HeightLatest)
if err != nil {
logger.Error("failed to query PVSS backend state",
"err", err,
)
os.Exit(1)
}
}
formatted, err := json.MarshalIndent(prettyOut, "", " ")
if err != nil {
logger.Error("failed to format state",
"err", err,
)
os.Exit(1)
}
fmt.Println(string(formatted))
}
// Register registers the beacon sub-command and all of it's children.
func Register(parentCmd *cobra.Command) {
beaconCmd.PersistentFlags().AddFlagSet(cmdGrpc.ClientFlags)
beaconCmd.AddCommand(beaconStatusCmd)
parentCmd.AddCommand(beaconCmd)
}