d7ad4108a7
This concludes all the code needed to connect to the DB and beacon node. We will no longer reference the lighthouse client because this application should work interchangeably with any beacon node. I have also standardized logging.
93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
package boot
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import (
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"fmt"
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"net/http"
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"strconv"
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log "github.com/sirupsen/logrus"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql/postgres"
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"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
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)
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var (
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bcHealthEndpoint = "/eth/v1/node/health"
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)
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// This function will ensure that we can connect to the beacon client.
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// Keep in mind, the beacon client will allow you to connect to it but it might
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// Not allow you to make http requests. This is part of its built in logic, and you will have
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// to follow their provided guidelines. https://lighthouse-book.sigmaprime.io/api-bn.html#security
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func checkBeaconClient(bcAddress string, bcPort int) error {
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log.Debug("Attempting to connect to the beacon client")
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bcEndpoint := "http://" + bcAddress + ":" + strconv.Itoa(bcPort) + bcHealthEndpoint
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resp, err := http.Get(bcEndpoint)
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if err != nil {
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loghelper.LogError(err).Error("Unable to get bc endpoint: ", bcEndpoint)
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return err
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}
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if resp.StatusCode < 200 || resp.StatusCode > 299 {
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log.Error("We recieved a non 2xx status code when checking the health of the beacon node.")
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log.Error("Health Endpoint Status Code: ", resp.StatusCode)
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return fmt.Errorf("beacon Node Provided a non 2xx status code, code provided: %d", resp.StatusCode)
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}
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log.Info("We can successfully reach the beacon client.")
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return nil
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}
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// A simple wrapper to create a DB object to use.
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func SetupDb(dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string) (*postgres.DB, error) {
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log.Debug("Resolving Driver Type")
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DbDriver, err := postgres.ResolveDriverType(driverName)
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if err != nil {
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log.WithFields(log.Fields{
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"err": err,
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"driver_name_provided": driverName,
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}).Error("Can't resolve driver type")
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}
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log.Info("Using Driver:", DbDriver)
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postgresConfig := postgres.Config{
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Hostname: dbHostname,
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Port: dbPort,
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DatabaseName: dbName,
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Username: dbUsername,
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Password: dbPassword,
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Driver: DbDriver,
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}
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DB, err := postgres.NewPostgresDB(postgresConfig)
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if err != nil {
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loghelper.LogError(err).Error("Unable to connect to the DB")
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return nil, err
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}
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return DB, err
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}
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// This function will perform some boot operations. If any steps fail, the application will fail to start.
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// Keep in mind that the DB connection can be lost later in the lifecycle of the application or
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// it might not be able to connect to the beacon client.
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//
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// 1. Make sure the Beacon client is up.
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//
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// 2. Connect to the database.
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//
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func BootApplication(dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string, bcAddress string, bcPort int) (*postgres.DB, error) {
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log.Debug("Checking beacon Client")
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err := checkBeaconClient(bcAddress, bcPort)
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if err != nil {
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return nil, err
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}
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log.Debug("Setting up DB connection")
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DB, err := SetupDb(dbHostname, dbPort, dbName, dbUsername, dbPassword, driverName)
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if err != nil {
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return nil, err
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}
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return DB, nil
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}
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