feat: tds scoring and api implementation

api/loaders/tourdesol/index.js

@@ -0,0 +1,25 @@
+import {FriendlyGet} from '../../friendlyGet';
+
+/**
+ * loadTourDeSolIndex: retrieves raw data from the data store and returns it for formatting
+ *
+ * @param redisX
+ * @returns {Promise<{__errors__: *, clusterInfo: *}>}
+ */
+export async function loadTourDeSolIndex(redisX, {isDemo, activeStage}) {
+  const {__errors__, redisKeys} = await new FriendlyGet()
+    .with('redisKeys', redisX.mgetAsync('!clusterInfo', '!blk-last-slot'))
+    .get();
+
+  const [clusterInfoJson, lastSlotString] = redisKeys;
+  const clusterInfo = JSON.parse(clusterInfoJson || {});
+  const lastSlot = parseInt(lastSlotString);
+
+  return {
+    __errors__,
+    isDemo,
+    activeStage,
+    clusterInfo,
+    lastSlot,
+  };
+}

api/network-explorer.js

@@ -1,10 +1,12 @@
+import {TourDeSolIndexView} from './views/tourdesol';
 import {BlockIndexView} from './views/blocks/index';
 import {BlockDetailView} from './views/blocks/detail';
 import {TransactionIndexView} from './views/transactions/index';
 import {TransactionDetailView} from './views/transactions/detail';
 import {ApplicationIndexView} from './views/applications/index';
 import {ApplicationDetailView} from './views/applications/detail';
 import {DEFAULT_PAGE_SIZE} from './loaders/timeline';
+import {loadTourDeSolIndex} from './loaders/tourdesol';
 import {loadBlockIndex} from './loaders/blocks/index';
 import {loadBlockDetail} from './loaders/blocks/detail';
 import {loadTransactionIndex} from './loaders/transactions/index';
@@ -32,6 +34,25 @@ function prettify(req, data) {
 //                                                      |_|
 //
 export function addNetworkExplorerRoutes(redisX, app) {
+  // Network Explorer Tour de Sol Index
+  app.get('/explorer/tourdesol/index', async (req, res) => {
+    const q = req.query || {};
+
+    const isDemo = q.isDemo || false;
+    const activeStage = q.activeStage && parseInt(q.activeStage);
+    const version = q.v || 'TourDeSolIndexView@latest';
+    const {__errors__, rawData} = await new FriendlyGet()
+      .with('rawData', loadTourDeSolIndex(redisX, {isDemo, activeStage}), {})
+      .get();
+
+    res.send(
+      prettify(
+        req,
+        new TourDeSolIndexView().asVersion(rawData, __errors__, version),
+      ),
+    );
+  });
+
   // Network Explorer Block Index
   app.get('/explorer/blocks/index', async (req, res) => {
     const q = req.query || {};

api/util.js

@@ -3,6 +3,8 @@ import _ from 'lodash';
 import Base58 from 'base-58';
 const b58e = Base58.encode;
 
+export const LAMPORT_SOL_RATIO = 0.0000000000582;
+
 export function transactionFromJson(x, outMessage = {}) {
   let txn = Transaction.from(Buffer.from(x));
   let tx = {};

api/views/tourdesol/index.js

@@ -0,0 +1,197 @@
+import {filter, reduce, orderBy} from 'lodash/fp';
+
+import {LAMPORT_SOL_RATIO} from '../../util';
+
+const slotsPerDay = (1.0 * 24 * 60 * 60) / 0.8;
+const TDS_DEFAULT_STAGE_LENGTH_BLOCKS = slotsPerDay * 5.0;
+
+const stages = [
+  {id: 0, title: 'Stage 0', hidden: true},
+  {
+    id: 1,
+    title: 'Stage 1',
+    isTbd: true,
+    startDate: '2019-09-09T17:00:00.0Z',
+    endDate: '2019-09-13T17:00:00.0Z',
+    duration: TDS_DEFAULT_STAGE_LENGTH_BLOCKS,
+  },
+  {
+    id: 2,
+    title: 'Stage 2',
+    isTbd: true,
+    startDate: '2019-10-07T17:00:00.0Z',
+    endDate: '2019-10-11T17:00:00.0Z',
+    duration: TDS_DEFAULT_STAGE_LENGTH_BLOCKS,
+  },
+  {
+    id: 3,
+    title: 'Stage 3',
+    isTbd: true,
+    startDate: '2019-11-04T17:00:00.0Z',
+    endDate: '2019-11-08T17:00:00.0Z',
+    duration: TDS_DEFAULT_STAGE_LENGTH_BLOCKS,
+  },
+];
+
+/**
+ * TourDeSolIndexView : supports the Tour de Sol index page
+ *
+ * Changes:
+ *   - 20190912.01 : initial version
+ */
+const __VERSION__ = '[email protected]';
+export class TourDeSolIndexView {
+  asVersion(rawData, __errors__, version) {
+    if (__errors__) {
+      return {
+        __VERSION__,
+        __errors__,
+      };
+    }
+
+    const {isDemo, activeStage, clusterInfo, lastSlot} = rawData;
+
+    const activeValidatorsRaw = filter(
+      node => node.what === 'Validator' && node.activatedStake,
+    )(clusterInfo.network);
+    const inactiveValidatorsRaw = filter(
+      node => node.what === 'Validator' && !node.activatedStake,
+    )(clusterInfo.network);
+
+    const currentStage = activeStage ? stages[activeStage] : null;
+    const slotsLeftInStage =
+      currentStage && currentStage.duration && currentStage.duration - lastSlot;
+    const daysLeftInStage =
+      slotsLeftInStage && (slotsLeftInStage / slotsPerDay).toFixed(3);
+
+    const clusterStats = {
+      lastSlot,
+      slotsLeftInStage,
+      daysLeftInStage,
+      stageDurationBlocks: currentStage && currentStage.duration,
+      networkInflationRate: clusterInfo.networkInflationRate,
+      totalSupply: clusterInfo.supply * LAMPORT_SOL_RATIO,
+      totalStaked: clusterInfo.totalStaked * LAMPORT_SOL_RATIO,
+      activeValidators: activeValidatorsRaw.length,
+      inactiveValidators: inactiveValidatorsRaw.length,
+    };
+
+    const scoreParams = this.computeScoreParams(
+      activeValidatorsRaw,
+      isDemo,
+      lastSlot,
+      currentStage,
+    );
+
+    const activeValidatorsPre = reduce((a, x) => {
+      const pubkey = x.nodePubkey;
+      const slot = x.currentSlot;
+      const {name, avatarUrl} = x.identity;
+      const activatedStake = x.activatedStake * LAMPORT_SOL_RATIO;
+      const uptimePercent =
+        x.uptime &&
+        x.uptime.uptime &&
+        x.uptime.uptime.length &&
+        100.0 * parseFloat(x.uptime.uptime[0].percentage);
+      const score = this.computeNodeScore(x, scoreParams);
+
+      const validator = {
+        name,
+        pubkey,
+        avatarUrl,
+        activatedStake,
+        slot,
+        uptimePercent,
+        score,
+      };
+
+      a.push(validator);
+
+      return a;
+    })([], activeValidatorsRaw);
+
+    const activeValidatorsRank = orderBy('score', 'desc')(activeValidatorsPre);
+
+    const result = reduce((a, x) => {
+      const {lastScore, lastRank, accum} = a;
+      const {score} = x;
+      const rank = score < lastScore ? lastRank + 1 : lastRank;
+
+      x.rank = rank;
+
+      accum.push(x);
+
+      return {lastScore: score, lastRank: rank, accum};
+    })({lastScore: 101, lastRank: 0, accum: []}, activeValidatorsRank);
+
+    if (version === 'TourDeSolIndexView@latest' || version === __VERSION__) {
+      return {
+        __VERSION__,
+        rawData,
+        clusterStats,
+        activeValidators: result.accum,
+        stages,
+        activeStage,
+        slotsPerDay,
+      };
+    }
+
+    return {
+      error: 'UnsupportedVersion',
+      currentVersion: __VERSION__,
+      desiredVersion: version,
+    };
+  }
+
+  computeNodeScore(x, scoreParams) {
+    const {minValF, spreadF, maxBlock, maxFactor} = scoreParams;
+    const currentBlock = x.currentSlot;
+
+    // the node's position based on block count only
+    const nonWeightedPosition = (currentBlock * 1.0) / (maxBlock * 1.0);
+
+    // synthetic function for 'closeness' : sin(), which is max at middle of race
+    const weightFactor = Math.sin(nonWeightedPosition * Math.PI) * maxFactor;
+
+    const nodePosF =
+      spreadF !== 0
+        ? (x.activatedStake * 1.0 - minValF) / spreadF
+        : Math.random();
+
+    const weightShare = nodePosF * weightFactor;
+    let weightedPosition = (nonWeightedPosition + weightShare) * 100.0;
+    weightedPosition = Math.max(Math.floor(weightedPosition), 0);
+    weightedPosition = Math.min(Math.ceil(weightedPosition), 100);
+
+    return weightedPosition;
+  }
+
+  computeScoreParams(validators, isDemo, lastSlot, currentStage) {
+    const firstStake =
+      (validators && validators.length && validators[0].activatedStake) || 0;
+
+    const [minVal, maxVal] = reduce((a, x) => {
+      let stake = x.activatedStake;
+      return [Math.min(a[0], stake), Math.max(a[1], stake)];
+    })([firstStake, firstStake], validators);
+
+    const maxValF = maxVal * 1.0; // the maximum observed stake
+    const minValF = minVal * 1.0; // the minimum observed stake
+    const spreadF = maxValF - minValF; // the spread between min and max
+
+    const currentBlock = !isDemo ? lastSlot : new Date().getTime() % 60000;
+    const maxBlock = !isDemo ? currentStage && currentStage.duration : 60000;
+
+    // maximum weight factor
+    const maxFactor = spreadF !== 0 ? 0.1 : 0.05;
+
+    return {
+      maxValF,
+      minValF,
+      spreadF,
+      currentBlock,
+      maxBlock,
+      maxFactor,
+    };
+  }
+}

src/v2/api/tourdesol.js

@@ -0,0 +1,17 @@
+import _ from 'lodash';
+
+import api from '.';
+
+const TOURDESOL_INDEX_VERSION = '[email protected]';
+
+export function apiGetTourDeSolIndexPage({version, activeStage, demo}) {
+  const queryString = _.toPairs({
+    v: version || TOURDESOL_INDEX_VERSION,
+    activeStage: activeStage || 0,
+    isDemo: demo || false,
+  })
+    .map(([k, v]) => `${k}=${encodeURIComponent(v)}`)
+    .join('&');
+
+  return api(`/explorer/tourdesol/index?${queryString}`);
+}

src/v2/components/TourDeSol/Cards/index.jsx

@@ -2,28 +2,29 @@
 import {map} from 'lodash/fp';
 import React from 'react';
 import {observer} from 'mobx-react-lite';
-import NodesStore from 'v2/stores/nodes';
 import Card from 'v2/components/UI/StatCard';
 
-import Socket from '../../../stores/socket';
 import Loader from '../../UI/Loader';
 import useStyles from './styles';
-import {LAMPORT_SOL_RATIO} from '../../../constants';
 
 const Cards = ({
-  stageDurationBlocks = null,
-  blocksLeftInStage = null,
-  daysLeftInStage = null,
+  isLoading,
+  clusterStats,
+}: {
+  isLoading: Boolean,
+  clusterStats: Object,
 }) => {
   const classes = useStyles();
   const {
+    stageDurationBlocks,
+    slotsLeftInStage,
+    daysLeftInStage,
     activeValidators,
     inactiveValidators,
-    supply,
+    totalSupply,
     totalStaked,
     networkInflationRate,
-  } = NodesStore;
-  const {isLoading} = Socket;
+  } = clusterStats;
 
   const cards = [
     {
@@ -36,7 +37,7 @@ const Cards = ({
     },
     {
       title: 'Blocks Left In Stage',
-      value: blocksLeftInStage || '...',
+      value: slotsLeftInStage || '...',
       changes: '',
       period: 'since yesterday',
       helpText:
@@ -53,31 +54,32 @@ const Cards = ({
     },
     {
       title: 'Circulating SOL',
-      value: (supply / Math.pow(2, 34)).toFixed(2),
+      value: totalSupply && totalSupply.toFixed(2),
       changes: '',
       period: 'since yesterday',
       helpText: 'The total number of SOL in existence.',
       helpTerm: '',
     },
     {
       title: 'Staked SOL',
-      value: (totalStaked * LAMPORT_SOL_RATIO).toFixed(8),
+      value: totalStaked && totalStaked.toFixed(8),
       changes: '',
       period: 'since yesterday',
       helpText: 'Amount of SOL staked to validators and activated',
       helpTerm: '',
     },
     {
       title: 'Current Network Inflation Rate',
-      value: (networkInflationRate * 100.0).toFixed(3) + '%',
+      value:
+        networkInflationRate && (networkInflationRate * 100.0).toFixed(3) + '%',
       changes: '',
       period: 'since yesterday',
       helpText: "The network's current annual SOL inflation rate.",
       helpTerm: '',
     },
     {
       title: 'Active Validators',
-      value: activeValidators.length,
+      value: activeValidators,
       changes: '',
       period: 'since yesterday',
       helpText:
@@ -86,7 +88,7 @@ const Cards = ({
     },
     {
       title: 'Inactive Validators',
-      value: inactiveValidators.length,
+      value: inactiveValidators,
       changes: '',
       period: 'since yesterday',
       helpText: