implemented event and req

app/handle-event.go

@@ -0,0 +1,66 @@
+package app
+
+import (
+	"context"
+	"fmt"
+
+	"encoders.orly/envelopes/eventenvelope"
+	"lol.mleku.dev/chk"
+	"lol.mleku.dev/log"
+	utils "utils.orly"
+)
+
+func (l *Listener) HandleEvent(c context.Context, msg []byte) (
+	err error,
+) {
+	// decode the envelope
+	env := eventenvelope.NewSubmission()
+	if msg, err = env.Unmarshal(msg); chk.E(err) {
+		return
+	}
+	if len(msg) > 0 {
+		log.I.F("extra '%s'", msg)
+	}
+	// check the event ID is correct
+	calculatedId := env.E.GetIDBytes()
+	if !utils.FastEqual(calculatedId, env.E.ID) {
+		if err = Ok.Invalid(
+			l, env, "event id is computed incorrectly, "+
+				"event has ID %0x, but when computed it is %0x",
+			env.E.ID, calculatedId,
+		); chk.E(err) {
+			return
+		}
+		return
+	}
+	// verify the signature
+	var ok bool
+	if ok, err = env.Verify(); chk.T(err) {
+		if err = Ok.Error(
+			l, env, fmt.Sprintf(
+				"failed to verify signature: %s",
+				err.Error(),
+			),
+		); chk.E(err) {
+			return
+		}
+	} else if !ok {
+		if err = Ok.Invalid(
+			l, env,
+			"signature is invalid",
+		); chk.E(err) {
+			return
+		}
+		return
+	}
+	// store the event
+	if _, _, err = l.SaveEvent(c, env.E, false, nil); chk.E(err) {
+		return
+	}
+	// Send a success response after storing
+	if err = Ok.Ok(l, env, ""); chk.E(err) {
+		return
+	}
+	log.D.F("saved event %0x", env.E.ID)
+	return
+}