feat: Add Lilypad version HTTP header (#408)

* feat: Add X-Lilypad-Version header

* chore: Log version header on add resource offer requests

pkg/http/utils.go

@@ -5,6 +5,7 @@ import (
 	"crypto/ecdsa"
 	"encoding/base64"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	stdlog "log"
@@ -13,6 +14,7 @@ import (
 	"strings"
 
 	"github.com/hashicorp/go-retryablehttp"
+	"github.com/lilypad-tech/lilypad/pkg/system"
 	"github.com/lilypad-tech/lilypad/pkg/web3"
 	"github.com/rs/zerolog/log"
 )
@@ -24,6 +26,9 @@ const X_LILYPAD_USER_HEADER = "X-Lilypad-User"
 // this is the signature of the message
 const X_LILYPAD_SIGNATURE_HEADER = "X-Lilypad-Signature"
 
+// the version run by the client or service
+const X_LILYPAD_VERSION_HEADER = "X-Lilypad-Version"
+
 // the context name we keep the address
 const CONTEXT_ADDRESS = "address"
 
@@ -100,6 +105,7 @@ func AddHeaders(
 	}
 	req.Header.Add(X_LILYPAD_USER_HEADER, userPayload)
 	req.Header.Add(X_LILYPAD_SIGNATURE_HEADER, userSignature)
+	req.Header.Add(X_LILYPAD_VERSION_HEADER, system.Version)
 	return nil
 }
 
@@ -161,6 +167,14 @@ func GetAddressFromHeaders(req *http.Request) (string, error) {
 	return signatureAddress, nil
 }
 
+func GetVersionFromHeaders(req *http.Request) (string, error) {
+	versionHeader := req.Header.Get(X_LILYPAD_VERSION_HEADER)
+	if versionHeader == "" {
+		return "", errors.New("missing version header")
+	}
+	return versionHeader, nil
+}
+
 func CorsMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
 		res.Header().Set("Access-Control-Allow-Origin", "*")

pkg/solver/server.go

@@ -289,6 +289,9 @@ func (solverServer *solverServer) addJobOffer(jobOffer data.JobOffer, res coreht
 }
 
 func (solverServer *solverServer) addResourceOffer(resourceOffer data.ResourceOffer, res corehttp.ResponseWriter, req *corehttp.Request) (*data.ResourceOfferContainer, error) {
+	versionHeader, _ := http.GetVersionFromHeaders(req)
+	log.Debug().Msgf("resource provider adding offer with version header %s", versionHeader)
+
 	signerAddress, err := http.GetAddressFromHeaders(req)
 	if err != nil {
 		log.Error().Err(err).Msgf("have error parsing user address")