116 lines
4.4 KiB
JavaScript
116 lines
4.4 KiB
JavaScript
const serialize = require('../api/resolvers/serial')
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const ITEM_EACH_REWARD = 3.0
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const UPVOTE_EACH_REWARD = 6.0
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const TOP_PERCENTILE = 21
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// TODO: use a weekly trust measure or make trust decay
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function earn ({ models }) {
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return async function ({ name }) {
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console.log('running', name)
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// compute how much sn earned today
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let [{ sum }] = await models.$queryRaw`
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SELECT sum("ItemAct".sats)
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FROM "ItemAct"
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JOIN "Item" on "ItemAct"."itemId" = "Item".id
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WHERE ("ItemAct".act in ('BOOST', 'STREAM')
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OR ("ItemAct".act IN ('VOTE','POLL') AND "Item"."userId" = "ItemAct"."userId"))
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AND "ItemAct".created_at > now_utc() - INTERVAL '1 day'`
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// convert to msats
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sum = sum * 1000
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/*
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How earnings work:
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1/3: top 21% posts over last 36 hours, scored on a relative basis
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1/3: top 21% comments over last 36 hours, scored on a relative basis
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1/3: top upvoters of top posts/comments, scored on:
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- their trust
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- how much they tipped
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- how early they upvoted it
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- how the post/comment scored
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*/
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if (sum <= 0) {
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console.log('done', name, 'no earning')
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return
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}
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// get earners { userId, id, type, rank, proportion }
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const earners = await models.$queryRaw(`
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WITH item_ratios AS (
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SELECT *,
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CASE WHEN "parentId" IS NULL THEN 'POST' ELSE 'COMMENT' END as type,
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CASE WHEN "weightedVotes" > 0 THEN "weightedVotes"/(sum("weightedVotes") OVER (PARTITION BY "parentId" IS NULL)) ELSE 0 END AS ratio
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FROM (
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SELECT *,
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NTILE(100) OVER (PARTITION BY "parentId" IS NULL ORDER BY "weightedVotes" desc) AS percentile,
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ROW_NUMBER() OVER (PARTITION BY "parentId" IS NULL ORDER BY "weightedVotes" desc) AS rank
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FROM
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"Item"
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WHERE created_at >= now_utc() - interval '36 hours'
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AND "weightedVotes" > 0
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) x
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WHERE x.percentile <= ${TOP_PERCENTILE}
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),
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upvoters AS (
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SELECT "ItemAct"."userId", item_ratios.id, item_ratios.ratio, item_ratios."parentId",
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sum("ItemAct".sats) as tipped, min("ItemAct".created_at) as acted_at
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FROM item_ratios
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JOIN "ItemAct" on "ItemAct"."itemId" = item_ratios.id
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WHERE act IN ('VOTE','TIP')
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AND "ItemAct"."userId" <> item_ratios."userId"
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GROUP BY "ItemAct"."userId", item_ratios.id, item_ratios.ratio, item_ratios."parentId"
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),
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upvoter_ratios AS (
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SELECT "userId", sum(early_multiplier*tipped_ratio*ratio*users.trust) as upvoter_ratio,
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"parentId" IS NULL as "isPost", CASE WHEN "parentId" IS NULL THEN 'TIP_POST' ELSE 'TIP_COMMENT' END as type
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FROM (
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SELECT *,
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1/(ROW_NUMBER() OVER (partition by id order by acted_at asc)) AS early_multiplier,
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tipped::float/(sum(tipped) OVER (partition by id)) tipped_ratio
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FROM upvoters
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) u
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JOIN users on "userId" = users.id
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GROUP BY "userId", "parentId" IS NULL
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)
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SELECT "userId", NULL as id, type, ROW_NUMBER() OVER (PARTITION BY "isPost" ORDER BY upvoter_ratio DESC) as rank,
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upvoter_ratio/(sum(upvoter_ratio) OVER (PARTITION BY "isPost"))/${UPVOTE_EACH_REWARD} as proportion
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FROM upvoter_ratios
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WHERE upvoter_ratio > 0
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UNION ALL
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SELECT "userId", id, type, rank, ratio/${ITEM_EACH_REWARD} as proportion
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FROM item_ratios`)
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// in order to group earnings for users we use the same createdAt time for
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// all earnings
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const now = new Date(new Date().getTime())
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// this is just a sanity check because it seems like a good idea
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let total = 0
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// for each earner, serialize earnings
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// we do this for each earner because we don't need to serialize
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// all earner updates together
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earners.forEach(async earner => {
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const earnings = Math.floor(earner.proportion * sum)
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total += earnings
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if (total > sum) {
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console.log('total exceeds sum', name)
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return
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}
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if (earnings > 0) {
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await serialize(models,
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models.$executeRaw`SELECT earn(${earner.userId}, ${earnings},
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${now}, ${earner.type}, ${earner.id}, ${earner.rank})`)
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}
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})
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console.log('done', name)
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}
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}
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module.exports = { earn }
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