Issue #16 : Gin reverse proxy implementation

README.md

@@ -24,7 +24,7 @@ To get started, follow these instructions:
    Open a terminal and run the following command to start the server:
 
    ```sh
-   go run ./server/main.go
+   go run ./examples/server/main.go
    # 2024/06/09 09:21:20 Server launched at localhost:8080
    ```
 
@@ -33,7 +33,7 @@ To get started, follow these instructions:
    In another terminal, run the following command to mint a token and access the service:
 
    ```sh
-   go run ./client/main.go
+   go run ./examples/client/main.go
    # Requesting Token...
    # {"user_id":"...","caveats": "...","signature":"..."}
    # Sending Authorization Request...
@@ -62,4 +62,4 @@ For more information, refer to the following resources:
 
 ## License
 
-This project is licensed under the terms of the [MIT License](LICENSE).
+This project is licensed under the terms of the [MIT License](LICENSE).

auth/mint.go

@@ -21,14 +21,17 @@ type Minter struct {
 	challenger challenge.Challenger
 }
 
+// NewMinter creates a new Minter.
 func NewMinter(service service.ServiceManager, secrets secrets.SecretStore, challenger challenge.Challenger) Minter {
 	return Minter{service, secrets, challenger}
 }
 
+// ServiceManager returns the service manager.
 func (minter *Minter) SecretStore() secrets.SecretStore {
 	return minter.secrets
 }
 
+// totalPrice calculates the total price of the requested services.
 func totalPrice(services ...service.Service) uint64 {
 	var total uint64 = 0
 	for _, s := range services {
@@ -37,8 +40,13 @@ func totalPrice(services ...service.Service) uint64 {
 	return total
 }
 
+// ServiceManager returns the service manager.
+func (minter *Minter) ServiceManager() service.ServiceManager {
+	return minter.service
+}
+
 // MintToken generates a new pre-token for the user.
-func (minter *Minter) MintToken(uid secrets.UserId, service_id service.ServiceId) (macaroon.PreToken, error) {
+func (minter *Minter) MintToken(uid secrets.UserID, service_id service.ServiceID) (macaroon.PreToken, error) {
 	// Initialize an empty pre-token.
 	token := macaroon.PreToken{}
 
@@ -71,15 +79,15 @@ func (minter *Minter) MintToken(uid secrets.UserId, service_id service.ServiceId
 	oven := macaroon.NewOven(secret)
 
 	// Cook the Macaroon with the user ID, requested services, and retrieved capabilities.
-	mac, err := oven.WithUserId(uid).WithFirstPartyCaveats(caveats...).Cook()
+	mac, err := oven.WithUserId(uid).WithFirstPartyCaveats(caveats...).Bake()
 	if err != nil {
 		return token, err
 	}
 
 	// Store the Macaroon in the secrets archive.
 	token.Macaroon, _ = mac.Oven().WithFirstPartyCaveats(macaroon.Caveat{
 		Key: macaroon.PaymentHashKey, Value: result.PaymentHash.String(),
-	}).Cook()
+	}).Bake()
 
 	// Return the generated pre-token.
 	return token, nil
@@ -105,7 +113,7 @@ func (minter *Minter) AuthToken(token *macaroon.Token) error {
 func (minter *Minter) AuthMacaroon(mac *macaroon.Macaroon) error {
 	secret, _ := minter.secrets.GetSecret(mac.UserId())
 	oven := macaroon.NewOven(secret)
-	nmac, _ := oven.WithThirdPartyCaveats(mac.Caveats()...).Cook()
+	nmac, _ := oven.WithThirdPartyCaveats(mac.Caveats()...).Bake()
 
 	// Verify the signature.
 	if mac.Signature() != nmac.Signature() {

client/main.go → examples/client/client.go

@@ -10,14 +10,17 @@ import (
 	"lsat/macaroon"
 	"lsat/mock"
 	"net/http"
+	"os"
 	"strings"
 	"time"
 )
 
 const (
-	authURL = "http://localhost:8080"
+	defaultService = "image:0"
 )
 
+var serviceURL = getEnv("SERVICE_URL", "http://localhost:8080/service/"+defaultService)
+
 type TestClient struct {
 	tokenPath string
 }
@@ -34,14 +37,15 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
-		client.sendAuthorizationRequest(authURL, *token)
+		client.sendAuthorizationRequest(serviceURL, *token)
 	}
 }
 
 var lightningNode = mock.TestLightningNode{Balance: 10000}
 
 // Connect to the phoenix node
-// var lightningNode = phoenixd.NewPhoenixClient("baseUrl", "password")
+// var lightningClient = phoenixd.NewPhoenixClient("http://127.0.0.1:9740", "")
+// var lightningNode = phoenixd.PhoenixNode{Client: lightningClient}
 
 func parsePreToken(mac string, invoice string) (macaroon.PreToken, error) {
 	Macaroon, err := decodeMacaroon(mac)
@@ -70,7 +74,7 @@ func (c *TestClient) sendTokenRequest() {
 	fmt.Println("Requesting Token...")
 
 	client := &http.Client{}
-	req, err := http.NewRequest("GET", authURL, nil)
+	req, err := http.NewRequest("PUT", serviceURL, nil)
 	if err != nil {
 		fmt.Println("Error creating request:", err)
 		return
@@ -106,7 +110,7 @@ func (c *TestClient) sendTokenRequest() {
 			}
 
 			fmt.Println(token.Macaroon.ToJSON())
-			c.sendAuthorizationRequest(authURL, token)
+			c.sendAuthorizationRequest(serviceURL, token)
 		}
 	} else {
 		body, _ := io.ReadAll(resp.Body)
@@ -145,6 +149,7 @@ func (c *TestClient) sendAuthorizationRequest(url string, token macaroon.Token)
 		}
 
 		// body, _ := io.ReadAll(resp.Body)
+		// fmt.Println(string(body))
 		fmt.Println(resp.Status)
 	} else {
 		fmt.Println("Unexpected response status:", resp.Status)
@@ -165,7 +170,7 @@ func shareToken(store auth.TokenStore, token macaroon.Token) error {
 	expiryDate := time.Now().Add(5 * time.Minute)
 
 	// Creating the restricted macaroon
-	mac, err := token.Macaroon.Oven().WithThirdPartyCaveats(macaroon.NewCaveat(macaroon.ExpiryDateKey, expiryDate.Format(time.RFC3339))).Cook()
+	mac, err := token.Macaroon.Oven().WithThirdPartyCaveats(macaroon.NewCaveat(macaroon.ExpiryDateKey, expiryDate.Format(time.RFC3339))).Bake()
 	if err != nil {
 		return err
 	}
@@ -178,3 +183,10 @@ func shareToken(store auth.TokenStore, token macaroon.Token) error {
 
 	return nil
 }
+
+func getEnv(key, defaultVal string) string {
+	if value, exists := os.LookupEnv(key); exists {
+		return value
+	}
+	return defaultVal
+}

examples/server/server.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"lsat/auth"
+	"lsat/mock"
+	"lsat/proxy"
+	"lsat/secrets"
+	"lsat/service"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+var (
+	// Connect to the phoenix node
+	// lightningClient = phoenixd.NewPhoenixClient("http://127.0.0.1:9740", "")
+	// lightningNode = phoenixd.PhoenixNode{Client: lightningClient}
+	// challenger = &challenge.ChallengeFactory{
+	// 	LightningNode: &lightningNode,
+	// }
+	secretStore = secrets.NewSecretFactory()
+	challenger  = mock.NewChallenger()
+)
+
+func main() {
+	config := service.NewConfig(
+		service.Service{
+			Name:       "image",
+			Tier:       service.BaseTier,
+			Duration:   time.Hour,
+			Price:      100,
+			Conditions: []service.Condition{service.Timeout{}},
+			Callback: func(c any) error {
+				ctx := c.(*gin.Context)
+				ctx.Redirect(http.StatusFound, "https://picsum.photos/1000")
+				return nil
+			},
+		},
+	)
+	minter := auth.NewMinter(config, secretStore, challenger)
+	router := proxy.L402ProxyServer{Minter: &minter}
+
+	router.Run()
+}

go.mod

@@ -10,11 +10,38 @@ require (
 )
 
 require (
+	github.com/bytedance/sonic v1.11.6 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/gin-contrib/cors v1.7.2 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/gin-gonic/gin v1.10.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
 	github.com/kr/pretty v0.3.1 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rogpeppe/go-internal v1.10.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	golang.org/x/arch v0.8.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
 	golang.org/x/exp v0.0.0-20240325151524-a685a6edb6d8 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/text v0.15.0 // indirect
+	google.golang.org/protobuf v1.34.1 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,27 +1,105 @@
+github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0=
+github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4=
+github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM=
+github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
+github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
+github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
+github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
+github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY=
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+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
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macaroon/macaroon.go

@@ -14,13 +14,13 @@ type Version = int8
 
 // Macaroon struct represents an LSAT (Lightning Service Authentication Token) macaroon.
 type Macaroon struct {
-	userId    secrets.UserId
+	userId    secrets.UserID
 	caveats   []Caveat
 	signature lntypes.Hash
 }
 
 // Uid returns the user ID associated with the macaroon.
-func (mac *Macaroon) UserId() secrets.UserId {
+func (mac *Macaroon) UserId() secrets.UserID {
 	return mac.userId
 }