feat: solver rate limiter exemption list

.local.dev

@@ -30,3 +30,4 @@ WEB3_TOKEN_ADDRESS_=0xa513E6E4b8f2a923D98304ec87F64353C4D5C853
 WEB3_USERS_ADDRESS=0x0DCd1Bf9A1b36cE34237eEaFef220932846BCD82
 BACALHAU_API_HOST=localhost
 BACALHAU_API_PORT=1234
+SERVER_RATE_EXEMPTED_IPS=127.0.0.1,::1

pkg/http/types.go

@@ -21,6 +21,7 @@ type ValidationToken struct {
 type RateLimiterOptions struct {
 	RequestLimit int
 	WindowLength int
+	ExemptedIPs  []string
 }
 
 type ClientOptions struct {

pkg/options/server.go

@@ -29,6 +29,7 @@ func GetDefaultRateLimiterOptions() http.RateLimiterOptions {
 	return http.RateLimiterOptions{
 		RequestLimit: GetDefaultServeOptionInt("SERVER_RATE_REQUEST_LIMIT", 5),
 		WindowLength: GetDefaultServeOptionInt("SERVER_RATE_WINDOW_LENGTH", 10),
+		ExemptedIPs:  GetDefaultServeOptionStringArray("SERVER_RATE_EXEMPTED_IPS", []string{}),
 	}
 }
 

pkg/solver/server.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	corehttp "net/http"
+	"net"
 	"os"
 	"path/filepath"
 	"strings"
@@ -62,17 +63,44 @@ func NewSolverServer(
  *
 */
 
+func exemptIPKeyFunc(exemptIPs []string) func(r *corehttp.Request) (string, error) {
+	return func(r *corehttp.Request) (string, error) {
+		ip, _, err := net.SplitHostPort(r.RemoteAddr)
+		if err != nil {
+			ip = r.RemoteAddr
+		}
+
+
+		for _, exemptIP := range exemptIPs {
+			if ip == exemptIP {
+				return "", nil
+			}
+		}
+
+		return ip, nil
+	}
+}
+
 func (solverServer *solverServer) ListenAndServe(ctx context.Context, cm *system.CleanupManager, tracerProvider *trace.TracerProvider) error {
 	router := mux.NewRouter()
 
 	subrouter := router.PathPrefix(http.API_SUB_PATH).Subrouter()
 
 	subrouter.Use(http.CorsMiddleware)
 	subrouter.Use(otelmux.Middleware("solver", otelmux.WithTracerProvider(tracerProvider)))
+
+
+	exemptIPs := solverServer.options.RateLimiter.ExemptedIPs
+
+	log.Debug().Strs("exemptIPs", exemptIPs).Msg("Loaded rate limit exemptions")
+
 	subrouter.Use(httprate.Limit(
 		solverServer.options.RateLimiter.RequestLimit,
 		time.Duration(solverServer.options.RateLimiter.WindowLength)*time.Second,
-		httprate.WithKeyFuncs(httprate.KeyByRealIP, httprate.KeyByEndpoint),
+		httprate.WithKeyFuncs(
+			exemptIPKeyFunc(exemptIPs),
+			httprate.KeyByEndpoint,
+		),
 	))
 
 	subrouter.HandleFunc("/job_offers", http.GetHandler(solverServer.getJobOffers)).Methods("GET")