Method Validate

validator/github/github.go:86–133

()

}

func (gh *Github) Validate() (err error) {
	gh.Identity = strings.ToLower(gh.Identity)
	gh.SignaturePayload = gh.GenerateSignPayload()

	client := ghub.NewClient(nil)
	gist, response, err := client.Gists.Get(context.TODO(), gh.ProofLocation)
	if err != nil {
		return xerrors.Errorf("error when fetching gist: %w", err)
	}

	if response.StatusCode != 200 {
		return xerrors.Errorf("error when fetching gist")
	}

	if gh.Identity != gist.Owner.GetLogin() {
		return xerrors.Errorf("gist owner mismatch: should be %s, but got %s", gh.Identity, gist.Owner.GetLogin())
	}
	gh.AltID = strconv.FormatInt(gist.Owner.GetID(), 10)

	gist_filename := fmt.Sprintf("0x%s.json", crypto.CompressedPubkeyHex(gh.Pubkey))
	files := gist.GetFiles()
	content := ""
	for filename, file := range files {
		if filename != ghub.GistFilename(gist_filename) {
			continue
		}

		content = *file.Content
	}
	if content == "" {
		return xerrors.Errorf("%s not found or empty", gist_filename)
	}
	payload := gistPayload{}
	err = json.Unmarshal([]byte(content), &payload)
	if err != nil {
		return xerrors.Errorf("error when parsing JSON: %w", err)
	}

	pubkey_recovered, err := crypto.StringToPubkey(payload.Persona)
	if err != nil {
		return xerrors.Errorf("error when recovering pubkey: %w", err)
	}
	signature, err := util.DecodeString(payload.Signature)
	if err != nil {
		return xerrors.Errorf("error when decoding signature: %w", err)
	}
	return crypto.ValidatePersonalSignature(payload.SignPayload, signature, pubkey_recovered)
}