fix: correct FailedDatabase counter for upsert_disbursement, expose api-server metrics (#2548)

* fix: correct FailedDatabase counter for upsert_disbursement

Previously we would always increment the counter instead of adding the
number of failed upserts observed.

* feat: expose teleportr-api metrics server
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.changeset/lucky-buckets-crash.md

+---
+'@eth-optimism/teleportr': patch
+---
+
+Fix teleportr FailedDatabaseOperations method for upsert_disbursement

.changeset/shiny-bugs-scream.md

+---
+'@eth-optimism/teleportr': patch
+---
+
+Expose metrics server

teleportr/api/server.go

@@ -18,6 +18,7 @@ import (
 	bsscore "github.com/ethereum-optimism/optimism/bss-core"
 	"github.com/ethereum-optimism/optimism/bss-core/dial"
 	"github.com/ethereum-optimism/optimism/bss-core/drivers"
+	"github.com/ethereum-optimism/optimism/bss-core/metrics"
 	"github.com/ethereum-optimism/optimism/bss-core/txmgr"
 	"github.com/ethereum-optimism/optimism/teleportr/bindings/deposit"
 	"github.com/ethereum-optimism/optimism/teleportr/db"
@@ -84,6 +85,10 @@ func Main(gitVersion string) func(*cli.Context) error {
 		}
 		defer database.Close()
 
+		if cfg.MetricsServerEnable {
+			go metrics.RunServer(cfg.MetricsHostname, cfg.MetricsPort)
+		}
+
 		server := NewServer(
 			ctx,
 			l1Client,
@@ -135,6 +140,9 @@ type Config struct {
 	PostgresPassword    string
 	PostgresDBName      string
 	PostgresEnableSSL   bool
+	MetricsServerEnable bool
+	MetricsHostname     string
+	MetricsPort         uint64
 	DisableHTTP2        bool
 }
 
@@ -151,6 +159,10 @@ func NewConfig(ctx *cli.Context) (Config, error) {
 		PostgresPassword:    ctx.GlobalString(flags.PostgresPasswordFlag.Name),
 		PostgresDBName:      ctx.GlobalString(flags.PostgresDBNameFlag.Name),
 		PostgresEnableSSL:   ctx.GlobalBool(flags.PostgresEnableSSLFlag.Name),
+		MetricsServerEnable: ctx.GlobalBool(flags.MetricsServerEnableFlag.Name),
+		MetricsHostname:     ctx.GlobalString(flags.MetricsHostnameFlag.Name),
+		MetricsPort:         ctx.GlobalUint64(flags.MetricsPortFlag.Name),
+		DisableHTTP2:        ctx.GlobalBool(flags.HTTP2DisableFlag.Name),
 	}, nil
 }
 

teleportr/drivers/disburser/driver.go

@@ -436,7 +436,7 @@ func (d *Driver) processPendingTxs(ctx context.Context) error {
 	d.metrics.SuccessfulDisbursements.Add(float64(successfulDisbursements))
 	d.metrics.FailedDisbursements.Add(float64(failedDisbursements))
 	d.metrics.FailedDatabaseMethods.With(DBMethodUpsertDisbursement).
-		Inc()
+		Add(float64(failedUpserts))
 
 	// We have completed our post-processing once all of the disbursements are
 	// written without failures.

teleportr/flags/api_flags.go

@@ -38,4 +38,8 @@ var APIFlags = []cli.Flag{
 	PostgresPasswordFlag,
 	PostgresDBNameFlag,
 	PostgresEnableSSLFlag,
+	MetricsServerEnableFlag,
+	MetricsHostnameFlag,
+	MetricsPortFlag,
+	HTTP2DisableFlag,
 }