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