2019-09-06 03:04:25 +00:00
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package blockchain
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import (
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2020-05-16 19:29:21 +00:00
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"encoding/hex"
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2019-09-06 03:04:25 +00:00
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"fmt"
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"net/http"
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2020-01-26 20:25:33 +00:00
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"github.com/emicklei/dot"
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2020-07-16 22:44:43 +00:00
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"github.com/prysmaticlabs/prysm/shared/params"
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2019-09-06 03:04:25 +00:00
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)
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2020-02-05 01:14:43 +00:00
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const template = `<html>
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<head>
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<script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/viz.js"></script>
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<script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/full.render.js"></script>
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<body>
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<script type="application/javascript">
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var graph = ` + "`%s`;" + `
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var viz = new Viz();
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viz.renderSVGElement(graph) // reading the graph.
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.then(function(element) {
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document.body.appendChild(element); // appends to document.
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})
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.catch(error => {
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// Create a new Viz instance (@see Caveats page for more info)
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viz = new Viz();
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// Possibly display the error
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console.error(error);
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});
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</script>
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</head>
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</body>
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</html>`
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2020-01-26 20:25:33 +00:00
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// TreeHandler is a handler to serve /tree page in metrics.
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2020-06-26 22:52:11 +00:00
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func (s *Service) TreeHandler(w http.ResponseWriter, r *http.Request) {
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2020-10-06 10:57:18 +00:00
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headState, err := s.HeadState(r.Context())
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if err != nil {
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log.WithError(err).Error("Could not get head state")
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return
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}
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if headState == nil {
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2020-02-06 04:49:12 +00:00
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if _, err := w.Write([]byte("Unavailable during initial syncing")); err != nil {
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log.WithError(err).Error("Failed to render p2p info page")
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}
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}
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2020-01-26 20:25:33 +00:00
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nodes := s.forkChoiceStore.Nodes()
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graph := dot.NewGraph(dot.Directed)
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graph.Attr("rankdir", "RL")
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graph.Attr("labeljust", "l")
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dotNodes := make([]*dot.Node, len(nodes))
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2020-10-06 10:57:18 +00:00
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avgBalance := uint64(averageBalance(headState.Balances()))
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2020-02-05 23:30:55 +00:00
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2020-01-26 20:25:33 +00:00
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for i := len(nodes) - 1; i >= 0; i-- {
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// Construct label for each node.
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2020-08-08 01:37:08 +00:00
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slot := fmt.Sprintf("%d", nodes[i].Slot())
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weight := fmt.Sprintf("%d", nodes[i].Weight()/1e9) // Convert unit Gwei to unit ETH.
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votes := fmt.Sprintf("%d", nodes[i].Weight()/1e9/avgBalance)
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2020-06-26 16:07:00 +00:00
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index := fmt.Sprintf("%d", i)
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2020-08-08 01:37:08 +00:00
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g := nodes[i].Graffiti()
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2020-05-16 19:29:21 +00:00
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graffiti := hex.EncodeToString(g[:8])
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label := "slot: " + slot + "\n votes: " + votes + "\n weight: " + weight + "\n graffiti: " + graffiti
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2020-01-26 20:25:33 +00:00
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var dotN dot.Node
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2020-08-08 01:37:08 +00:00
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if nodes[i].Parent() != ^uint64(0) {
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2020-01-26 20:25:33 +00:00
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dotN = graph.Node(index).Box().Attr("label", label)
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}
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2020-02-05 23:30:55 +00:00
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2020-10-06 10:57:18 +00:00
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if nodes[i].Slot() == s.HeadSlot() &&
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2020-08-08 01:37:08 +00:00
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nodes[i].BestDescendant() == ^uint64(0) &&
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nodes[i].Parent() != ^uint64(0) {
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2020-02-05 23:30:55 +00:00
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dotN = dotN.Attr("color", "green")
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}
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2020-01-26 20:25:33 +00:00
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dotNodes[i] = &dotN
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}
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2020-01-27 21:48:16 +00:00
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for i := len(nodes) - 1; i >= 0; i-- {
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2020-08-08 01:37:08 +00:00
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if nodes[i].Parent() != ^uint64(0) && nodes[i].Parent() < uint64(len(dotNodes)) {
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graph.Edge(*dotNodes[i], *dotNodes[nodes[i].Parent()])
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2020-01-26 20:25:33 +00:00
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}
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}
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w.WriteHeader(http.StatusOK)
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2020-02-05 01:14:43 +00:00
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w.Header().Set("Content-Type", "text/html")
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if _, err := fmt.Fprintf(w, template, graph.String()); err != nil {
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2020-01-26 20:25:33 +00:00
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log.WithError(err).Error("Failed to render p2p info page")
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}
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}
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2020-07-16 22:44:43 +00:00
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func averageBalance(balances []uint64) float64 {
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total := uint64(0)
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for i := 0; i < len(balances); i++ {
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total += balances[i]
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}
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return float64(total) / float64(len(balances)) / float64(params.BeaconConfig().GweiPerEth)
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}
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