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fix trust after mathjs upgrade

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k00b 2025-03-05 07:26:28 -06:00
parent bf54044a96
commit d3e5af40ec
1 changed files with 20 additions and 14 deletions
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34
worker/trust.js
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@ -18,15 +18,12 @@ export async function trust ({ boss, models }) {
const MAX_DEPTH = 10
const MAX_TRUST = 1
const MIN_SUCCESS = 1
// increasing disgree_mult increases distrust when there's disagreement
// ... this cancels DISAGREE_MULT number of "successes" for every disagreement
const DISAGREE_MULT = 10
// https://en.wikipedia.org/wiki/Normal_distribution#Quantile_function
const Z_CONFIDENCE = 6.109410204869 // 99.9999999% confidence
const GLOBAL_ROOT = 616
const SEED_WEIGHT = 0.25
const SEED_WEIGHT = 1.0
const AGAINST_MSAT_MIN = 1000
const MSAT_MIN = 1000
const MSAT_MIN = 20001 // 20001 is the minimum for a tip to be counted in trust
const SIG_DIFF = 0.1 // need to differ by at least 10 percent
/*
@ -88,16 +85,16 @@ function trustGivenGraph (graph) {
const std = sqapply(mat, math.std) // math.squeeze(math.std(mat, 1))
const mean = sqapply(mat, math.mean) // math.squeeze(math.mean(mat, 1))
const zscore = math.map(mat, (val, idx) => {
const zstd = math.subset(std, math.index(idx[0]))
const zmean = math.subset(mean, math.index(idx[0]))
const zstd = math.subset(std, math.index(idx[0], 0))
const zmean = math.subset(mean, math.index(idx[0], 0))
return zstd ? (val - zmean) / zstd : 0
})
console.timeLog('trust', 'minmax')
const min = sqapply(zscore, math.min) // math.squeeze(math.min(zscore, 1))
const max = sqapply(zscore, math.max) // math.squeeze(math.max(zscore, 1))
const mPersonal = math.map(zscore, (val, idx) => {
const zmin = math.subset(min, math.index(idx[0]))
const zmax = math.subset(max, math.index(idx[0]))
const zmin = math.subset(min, math.index(idx[0], 0))
const zmax = math.subset(max, math.index(idx[0], 0))
const zrange = zmax - zmin
if (val > zmax) return MAX_TRUST
return zrange ? (val - zmin) / zrange : 0
@ -123,7 +120,8 @@ async function getGraph (models) {
WITH user_votes AS (
SELECT "ItemAct"."userId" AS user_id, users.name AS name, "ItemAct"."itemId" AS item_id, min("ItemAct".created_at) AS act_at,
users.created_at AS user_at, "ItemAct".act = 'DONT_LIKE_THIS' AS against,
count(*) OVER (partition by "ItemAct"."userId") AS user_vote_count
count(*) OVER (partition by "ItemAct"."userId") AS user_vote_count,
sum("ItemAct".msats) as user_msats
FROM "ItemAct"
JOIN "Item" ON "Item".id = "ItemAct"."itemId" AND "ItemAct".act IN ('FEE', 'TIP', 'DONT_LIKE_THIS')
AND "Item"."parentId" IS NULL AND NOT "Item".bio AND "Item"."userId" <> "ItemAct"."userId"
@ -136,9 +134,9 @@ async function getGraph (models) {
),
user_pair AS (
SELECT a.user_id AS a_id, b.user_id AS b_id,
count(*) FILTER(WHERE a.act_at > b.act_at AND a.against = b.against) AS before,
count(*) FILTER(WHERE b.act_at > a.act_at AND a.against = b.against) AS after,
count(*) FILTER(WHERE a.against <> b.against) * ${DISAGREE_MULT} AS disagree,
sum(CASE WHEN b.user_msats > a.user_msats THEN a.user_msats / b.user_msats::FLOAT ELSE b.user_msats / a.user_msats::FLOAT END) FILTER(WHERE a.act_at > b.act_at AND a.against = b.against) AS before,
sum(CASE WHEN b.user_msats > a.user_msats THEN a.user_msats / b.user_msats::FLOAT ELSE b.user_msats / a.user_msats::FLOAT END) FILTER(WHERE b.act_at > a.act_at AND a.against = b.against) AS after,
sum(log(1 + a.user_msats / 10000::float) + log(1 + b.user_msats / 10000::float)) FILTER(WHERE a.against <> b.against) AS disagree,
b.user_vote_count AS b_total, a.user_vote_count AS a_total
FROM user_votes a
JOIN user_votes b ON a.item_id = b.item_id
@ -180,7 +178,7 @@ async function storeTrust (models, graph, vGlobal, mPersonal) {
})
math.forEach(mPersonal, (val, [fromIdx, toIdx]) => {
const globalVal = vGlobal.get([toIdx])
const globalVal = vGlobal.get([toIdx, 0])
if (isNaN(val) || val - globalVal <= SIG_DIFF) return
if (personalValues) personalValues += ','
personalValues += `(${graph[fromIdx].id}, ${graph[toIdx].id}, ${val}::FLOAT)`
@ -199,6 +197,14 @@ async function storeTrust (models, graph, vGlobal, mPersonal) {
SELECT id, oid, trust
FROM (values ${personalValues}) g(id, oid, trust)
ON CONFLICT ("fromId", "toId") DO UPDATE SET "zapTrust" = EXCLUDED."zapTrust"`
),
// select all arcs that don't exist in personalValues and delete them
models.$executeRawUnsafe(
`DELETE FROM "Arc"
WHERE ("fromId", "toId") NOT IN (
SELECT id, oid
FROM (values ${personalValues}) g(id, oid, trust)
)`
)
])
}