feat: add DID-based authentication middleware

pkg/common/didauth/resolver/conn.go

@@ -0,0 +1,35 @@
+package resolver
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+	"github.com/onsonr/sonr/pkg/gateway/config"
+	"google.golang.org/grpc"
+)
+
+type ClientsContext struct {
+	echo.Context
+	addr string
+}
+
+func GetClientConn(c echo.Context) (*grpc.ClientConn, error) {
+	cc, ok := c.(*ClientsContext)
+	if !ok {
+		return nil, echo.NewHTTPError(http.StatusInternalServerError, "ClientsContext not found")
+	}
+	grpcConn, err := grpc.NewClient(cc.addr, grpc.WithInsecure())
+	if err != nil {
+		return nil, echo.NewHTTPError(http.StatusInternalServerError, "Failed to dial gRPC")
+	}
+	return grpcConn, nil
+}
+
+func Middleware(env config.Env) echo.MiddlewareFunc {
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			cc := &ClientsContext{Context: c, addr: env.GetSonrGrpcUrl()}
+			return next(cc)
+		}
+	}
+}

pkg/common/didauth/resolver/grpc.go

@@ -0,0 +1,41 @@
+package resolver
+
+import (
+	bankv1beta1 "cosmossdk.io/api/cosmos/bank/v1beta1"
+	"github.com/labstack/echo/v4"
+	didv1 "github.com/onsonr/sonr/api/did/v1"
+	dwnv1 "github.com/onsonr/sonr/api/dwn/v1"
+	svcv1 "github.com/onsonr/sonr/api/svc/v1"
+)
+
+func BankQueryClient(c echo.Context) (bankv1beta1.QueryClient, error) {
+	conn, err := GetClientConn(c)
+	if err != nil {
+		return nil, err
+	}
+	return bankv1beta1.NewQueryClient(conn), nil
+}
+
+func DIDQueryClient(c echo.Context) (didv1.QueryClient, error) {
+	conn, err := GetClientConn(c)
+	if err != nil {
+		return nil, err
+	}
+	return didv1.NewQueryClient(conn), nil
+}
+
+func DWNQueryClient(c echo.Context) (dwnv1.QueryClient, error) {
+	conn, err := GetClientConn(c)
+	if err != nil {
+		return nil, err
+	}
+	return dwnv1.NewQueryClient(conn), nil
+}
+
+func SVCQueryClient(c echo.Context) (svcv1.QueryClient, error) {
+	conn, err := GetClientConn(c)
+	if err != nil {
+		return nil, err
+	}
+	return svcv1.NewQueryClient(conn), nil
+}