mirror of https://codeberg.org/pzp/pzp-sync.git
595 lines
20 KiB
JavaScript
595 lines
20 KiB
JavaScript
// @ts-ignore
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const Pipeable = require('push-stream/pipeable')
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const p = require('promisify-4loc')
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const { isRange, isEmptyRange } = require('./range')
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const { isMsgId, isBloom, isMsgIds, isMsgs } = require('./util')
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/**
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* @typedef {ReturnType<import('pzp-goals').init>} PZPGoals
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* @typedef {ReturnType<import('pzp-db').init>} PZPDB
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* @typedef {import('pzp-db').RecPresent} Rec
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* @typedef {import('pzp-db/msg-v4').Msg} Msg
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* @typedef {import('./range').Range} Range
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* @typedef {import('./algorithm')} Algorithm
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* @typedef {import('pzp-goals').Goal} Goal
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* @typedef {string} MsgID
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* @typedef {{id: string}} WithId
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* @typedef {WithId & {phase: 0, payload?: undefined}} Data0
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* @typedef {WithId & {phase: 1, payload: Range}} Data1
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* @typedef {WithId & {phase: 2, payload: { haveRange: Range, wantRange: Range }}} Data2
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* @typedef {WithId & {phase: 3, payload: { wantRange: Range, bloom: JSON }}} Data3
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* @typedef {WithId & {phase: 4 | 5 | 6 | 7, payload: { msgIDs: Array<MsgID>, bloom: JSON }}} Data4567
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* @typedef {WithId & {phase: 8, payload: { msgs: Array<Msg>, bloom: JSON }}} Data8
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* @typedef {WithId & {phase: 9, payload: Array<Msg>}} Data9
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* @typedef {Data0 | Data1 | Data2 | Data3 | Data4567 | Data8 | Data9} Data
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*/
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/**
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* @template T
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* @typedef {[T] extends [void] ?
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* (...args: [Error] | []) => void :
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* (...args: [Error] | [null, T]) => void
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* } CB
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*/
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class SyncStream extends Pipeable {
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#myId
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/** @type {Algorithm} */
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#algo
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/** @type {CallableFunction} */
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#debug
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/** @type {Set<string>} Set of tangleId */
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#requested
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/** @type {PZPDB} */
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#db
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/** @type {PZPGoals} */
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#goals
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/**
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* tangleId => have-range by local peer
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* @type {Map<string, [number, number]>}
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*/
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#localHave
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/**
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* tangleId => want-range by local peer
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* @type {Map<string, [number, number]>}
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*/
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#localWant
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/**
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* tangleId => have-range by remote peer
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* @type {Map<string, [number, number]>}
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*/
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#remoteHave
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/**
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* tangleId => want-range by remote peer
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* @type {Map<string, [number, number]>}
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*/
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#remoteWant
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/**
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* tangleId => Set of msgIDs
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* @type {Map<string, Set<string>>}
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*/
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#receivableMsgs
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/**
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* tangleId => Set of msgIDs
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* @type {Map<string, Set<string>>}
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*/
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#sendableMsgs
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/** @type {Set<string>} */
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#realtimeSyncing
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/**
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* @param {string} localId
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* @param {CallableFunction} debug
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* @param {PZPDB} db
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* @param {PZPGoals} goals
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* @param {Algorithm} algo
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*/
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constructor(localId, debug, db, goals, algo) {
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super()
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this.paused = false // TODO: should we start as paused=true?
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this.ended = false
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/** @type {any} */
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this.source = this.sink = null
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this.#myId = localId.slice(0, 6)
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this.#debug = debug
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this.#db = db
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this.#goals = goals
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this.#algo = algo
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this.#requested = new Set()
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this.#realtimeSyncing = new Set()
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this.#localHave = new Map()
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this.#localWant = new Map()
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this.#remoteHave = new Map()
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this.#remoteWant = new Map()
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this.#receivableMsgs = new Map()
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this.#sendableMsgs = new Map()
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// Setup real-time syncing
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this.#db.onRecordAdded((/** @type {Rec} */ { id: msgID, msg }) => {
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if (!this.sink || this.sink.paused) return
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const tangleIDs = [msgID].concat(Object.keys(msg.metadata.tangles))
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this.resume()
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for (const id of tangleIDs) {
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if (this.#realtimeSyncing.has(id)) {
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if (this.#receivableMsgs.has(msgID)) continue
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if (this.#receivableMsgs.get(id)?.has(msgID)) continue
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if (this.#sendableMsgs.has(msgID)) continue
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if (this.#sendableMsgs.get(id)?.has(msgID)) continue
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this.sink.write({ id, phase: 9, payload: [msg] })
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// prettier-ignore
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this.#debug('%s Stream OUTr: sent msg %s in %s', this.#myId, msgID, id)
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return
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}
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}
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})
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}
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initiate() {
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for (const goal of this.#goals.list()) {
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this.#requested.add(goal.id)
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}
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this.resume()
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this.#goals.watch((/** @type {any} */ goal) => {
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if (!this.#requested.has(goal.id) && goal.type !== 'none') {
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this.#requested.add(goal.id)
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this.resume()
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}
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})
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}
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#canSend() {
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return this.sink && !this.sink.paused && !this.ended
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}
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/**
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* @param {string} id
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* @param {Array<MsgID>} msgIDs
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*/
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#updateSendableMsgs(id, msgIDs) {
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const set = this.#sendableMsgs.get(id) ?? new Set()
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for (const msgID of msgIDs) {
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set.add(msgID)
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}
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this.#sendableMsgs.set(id, set)
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}
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/**
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* @param {string} id
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* @param {Array<string>} msgIDs
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*/
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#updateReceivableMsgs(id, msgIDs) {
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const set = this.#receivableMsgs.get(id) ?? new Set()
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for (const msgID of msgIDs) {
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set.add(msgID)
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}
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this.#receivableMsgs.set(id, set)
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}
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/**
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* @param {string} id
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*/
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async #sendLocalHave(id) {
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const localHaveRange = await this.#algo.haveRange(id)
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this.#localHave.set(id, localHaveRange)
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this.sink.write({ id, phase: 1, payload: localHaveRange })
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// prettier-ignore
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this.#debug('%s Stream OUT1: sent local have-range %o for %s', this.#myId, localHaveRange, id)
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}
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/**
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* @param {string} id
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* @param {Range} remoteHaveRange
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*/
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async #sendLocalHaveAndWant(id, remoteHaveRange) {
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// prettier-ignore
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this.#debug('%s Stream IN1: got remote have-range %o for %s', this.#myId, remoteHaveRange, id)
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this.#remoteHave.set(id, remoteHaveRange)
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const goal = this.#goals.get(id)
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const haveRange = await this.#algo.haveRange(id)
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const wantRange = await this.#algo.wantRange(haveRange, remoteHaveRange, goal)
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this.#localHave.set(id, haveRange)
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this.#localWant.set(id, wantRange)
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this.sink.write({ id, phase: 2, payload: { haveRange, wantRange } })
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// prettier-ignore
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this.#debug('%s Stream OUT2: sent local have-range %o and want-range %o for %s', this.#myId, haveRange, wantRange, id)
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}
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/**
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* @param {string} id
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* @param {Range} remoteHaveRange
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* @param {Range} remoteWantRange
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*/
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async #sendLocalWantAndInitBloom(id, remoteHaveRange, remoteWantRange) {
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// prettier-ignore
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this.#debug('%s Stream IN2: got remote have-range %o and want-range %o for %s', this.#myId, remoteHaveRange, remoteWantRange, id)
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this.#remoteHave.set(id, remoteHaveRange)
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this.#remoteWant.set(id, remoteWantRange)
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const goal = this.#goals.get(id)
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const haveRange = this.#localHave.get(id) ?? [-1, -1]
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const localWant = await this.#algo.wantRange(haveRange, remoteHaveRange, goal)
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this.#localWant.set(id, localWant)
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const localBloom0 = await this.#algo.bloomFor(id, 0, localWant)
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this.sink.write({
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id,
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phase: 3,
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payload: { bloom: localBloom0, wantRange: localWant },
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})
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// prettier-ignore
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this.#debug('%s Stream OUT3: sent local want-range %o and bloom round 0 for %s', this.#myId, localWant, id)
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}
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/**
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* @param {string} id
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* @param {Range} remoteWantRange
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* @param {JSON} remoteBloom
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*/
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async #sendInitBloomRes(id, remoteWantRange, remoteBloom) {
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// prettier-ignore
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this.#debug('%s Stream IN3: got remote want-range %o and bloom round 0 for %s', this.#myId, remoteWantRange, id)
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this.#remoteWant.set(id, remoteWantRange)
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const msgIDsForThem = await this.#algo.getMsgsMissing(
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id,
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0,
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remoteWantRange,
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remoteBloom // representation of everything they have for me
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)
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this.#updateSendableMsgs(id, msgIDsForThem)
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const localWantRange = this.#localWant.get(id)
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if (!localWantRange) throw new Error(`Local want-range not set for ${id}`)
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const localBloom = await this.#algo.bloomFor(id, 0, localWantRange)
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this.sink.write({
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id,
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phase: 4,
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payload: { bloom: localBloom, msgIDs: msgIDsForThem },
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})
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// prettier-ignore
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this.#debug('%s Stream OUT4: sent bloom round 0 plus msgIDs in %s: %o', this.#myId, id, msgIDsForThem)
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}
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/**
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* @param {string} id
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* @param {number} phase
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* @param {number} round
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* @param {JSON} remoteBloom
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* @param {Array<MsgID>} msgIDsForMe
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*/
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async #sendBloomReq(id, phase, round, remoteBloom, msgIDsForMe) {
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// prettier-ignore
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this.#debug('%s Stream IN%s: got bloom round %s plus msgIDs in %s: %o', this.#myId, phase-1, round-1, id, msgIDsForMe)
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const remoteWantRange = this.#remoteWant.get(id) ?? [0, 0]
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this.#updateReceivableMsgs(id, msgIDsForMe)
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const msgIDsForThem = await this.#algo.getMsgsMissing(
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id,
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round - 1,
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remoteWantRange,
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remoteBloom
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)
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this.#updateSendableMsgs(id, msgIDsForThem)
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const extras = this.#receivableMsgs.get(id)
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const localWantRange = this.#localWant.get(id)
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if (!localWantRange) throw new Error(`Local want-range not set for ${id}`)
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const localBloom = await this.#algo.bloomFor(id, round, localWantRange, extras)
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this.sink.write({
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id,
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phase,
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payload: { bloom: localBloom, msgIDs: msgIDsForThem },
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})
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// prettier-ignore
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this.#debug('%s Stream OUT%s: sent bloom round %s plus msgIDs in %s: %o', this.#myId, phase, round, id, msgIDsForThem)
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}
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/**
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* @param {string} id
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* @param {number} phase
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* @param {number} round
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* @param {JSON} remoteBloom
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* @param {Array<MsgID>} msgIDsForMe
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*/
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async #sendBloomRes(id, phase, round, remoteBloom, msgIDsForMe) {
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// prettier-ignore
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this.#debug('%s Stream IN%s: got bloom round %s plus msgIDs in %s: %o', this.#myId, phase-1, round, id, msgIDsForMe)
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const remoteWantRange = this.#remoteWant.get(id) ?? [0, 0]
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this.#updateReceivableMsgs(id, msgIDsForMe)
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const msgIDsForThem = await this.#algo.getMsgsMissing(
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id,
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round,
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remoteWantRange,
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remoteBloom
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)
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this.#updateSendableMsgs(id, msgIDsForThem)
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const extras = this.#receivableMsgs.get(id)
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const localWantRange = this.#localWant.get(id)
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if (!localWantRange) throw new Error(`Local want-range not set for ${id}`)
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const localBloom = await this.#algo.bloomFor(id, round, localWantRange, extras)
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this.sink.write({
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id,
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phase,
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payload: { bloom: localBloom, msgIDs: msgIDsForThem },
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})
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// prettier-ignore
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this.#debug('%s Stream OUT%s: sent bloom round %s plus msgIDs in %s: %o', this.#myId, phase, round, id, msgIDsForThem)
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}
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/**
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* @param {string} id
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* @param {number} round
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* @param {JSON} remoteBloom
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* @param {Array<MsgID>} msgIDsForMe
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*/
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async #sendMissingMsgsReq(id, round, remoteBloom, msgIDsForMe) {
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// prettier-ignore
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this.#debug('%s Stream IN7: got bloom round %s plus msgIDs in %s: %o', this.#myId, round, id, msgIDsForMe)
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const remoteWantRange = this.#remoteWant.get(id) ?? [0, 0]
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this.#updateReceivableMsgs(id, msgIDsForMe)
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const msgIDsForThem = await this.#algo.getMsgsMissing(
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id,
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round,
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remoteWantRange,
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remoteBloom
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)
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this.#updateSendableMsgs(id, msgIDsForThem)
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const msgIDs = this.#sendableMsgs.get(id) ?? new Set()
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const tangleMsgs = await this.#algo.getTangleMsgs(id, msgIDs)
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const accountMsgs = await this.#algo.filterAndFetchAccountMsgs(msgIDs)
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const msgs = accountMsgs.concat(tangleMsgs)
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const extras = this.#receivableMsgs.get(id)
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const localWantRange = this.#localWant.get(id)
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if (!localWantRange) throw new Error(`Local want-range not set for ${id}`)
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const localBloom = await this.#algo.bloomFor(id, round, localWantRange, extras)
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this.sink.write({
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id,
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phase: 8,
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payload: { msgs, bloom: localBloom },
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})
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// prettier-ignore
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this.#debug('%s Stream OUT8: sent bloom round %s plus %s msgs in %s', this.#myId, round, msgs.length, id)
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if (!this.#realtimeSyncing.has(id) && !isEmptyRange(remoteWantRange)) {
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this.#realtimeSyncing.add(id)
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}
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}
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/**
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* @param {string} id
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* @param {number} round
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* @param {JSON} remoteBloom
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* @param {Array<Msg>} msgsForMe
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*/
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async #sendMissingMsgsRes(id, round, remoteBloom, msgsForMe) {
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// prettier-ignore
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this.#debug('%s Stream IN8: got bloom round %s plus %s msgs in %s', this.#myId, round, msgsForMe.length, id)
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const remoteWantRange = this.#remoteWant.get(id) ?? [0, 0]
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const msgIDsForThem = await this.#algo.getMsgsMissing(
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id,
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round,
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remoteWantRange,
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remoteBloom
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)
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this.#updateSendableMsgs(id, msgIDsForThem)
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const msgIDs = this.#sendableMsgs.get(id) ?? new Set()
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const tangleMsgs = await this.#algo.getTangleMsgs(id, msgIDs)
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const accountMsgs = await this.#algo.filterAndFetchAccountMsgs(msgIDs)
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const msgs = accountMsgs.concat(tangleMsgs)
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this.sink.write({ id, phase: 9, payload: msgs })
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// prettier-ignore
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this.#debug('%s Stream OUT9: sent %s msgs in %s', this.#myId, msgs.length, id)
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if (!this.#realtimeSyncing.has(id) && !isEmptyRange(remoteWantRange)) {
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this.#realtimeSyncing.add(id)
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}
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this.#consumeMissingMsgs(id, msgsForMe)
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}
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/**
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* @param {string} id
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* @param {Array<Msg>} msgsForMe
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* @returns
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*/
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#consumeMissingMsgs(id, msgsForMe) {
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this.#requested.delete(id)
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this.#localHave.delete(id)
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this.#remoteHave.delete(id)
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this.#remoteWant.delete(id)
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if (msgsForMe.length === 0) return
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const goal = this.#goals.get(id)
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if (!goal) {
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this.#debug('%s Stream exception: no goal found for %s', this.#myId, id)
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return
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}
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const localWantRange = this.#localWant.get(id)
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if (!localWantRange) {
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// prettier-ignore
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this.#debug('%s Stream exception: local want-range not set for %s', this.#myId, id)
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return
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}
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const validMsgs = this.#algo.filterReceivedMsgs(
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id,
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msgsForMe,
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localWantRange
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)
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const validMsgIDs = this.#algo.getMsgIDs(validMsgs)
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this.#updateReceivableMsgs(id, validMsgIDs)
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try {
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this.#algo.commit(id, validMsgs, goal)
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} catch (err) {
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// prettier-ignore
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this.#debug('%s Stream could not commit received messages, because: %s', this.#myId, err)
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}
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}
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/**
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* @param {string} id
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* @param {Range} remoteWantRange
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*/
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async #sendMsgsInRemoteWant(id, remoteWantRange) {
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const msgs = []
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const rangeMsgs = await this.#algo.getMsgsInRange(id, remoteWantRange)
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const tangleMsgs = await this.#algo.getTangleMsgs(id, rangeMsgs)
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const accountMsgs = await this.#algo.getAccountMsgsFor(tangleMsgs)
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for (const msg of accountMsgs) msgs.push(msg)
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for (const msg of tangleMsgs) msgs.push(msg)
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const msgIDs = this.#algo.getMsgIDs(msgs)
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this.#updateSendableMsgs(id, msgIDs)
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this.sink.write({ id, phase: 9, payload: msgs })
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// prettier-ignore
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this.#debug('%s Stream OUT9: sent %s msgs in %s', this.#myId, msgs.length, id)
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if (!this.#realtimeSyncing.has(id) && !isEmptyRange(remoteWantRange)) {
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this.#realtimeSyncing.add(id)
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}
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}
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// source method
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resume() {
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if (!this.sink || this.sink.paused) return
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|
|
for (const id of this.#requested) {
|
|
if (!this.#canSend()) return
|
|
this.write({ id, phase: 0 })
|
|
}
|
|
}
|
|
|
|
/**
|
|
* sink method
|
|
* @param {Data} data
|
|
*/
|
|
write(data) {
|
|
// prettier-ignore
|
|
if (!data) return this.#debug('Invalid data from remote peer: missing data')
|
|
// prettier-ignore
|
|
if (typeof data !== 'object') return this.#debug('Invalid data from remote peer: not an object')
|
|
// prettier-ignore
|
|
if (Array.isArray(data)) return this.#debug('Invalid data from remote peer: is an array')
|
|
const { id, phase, payload } = data
|
|
// prettier-ignore
|
|
if (typeof phase !== 'number') return this.#debug("Invalid data from remote peer: phase isn't a number")
|
|
// prettier-ignore
|
|
if (!isMsgId(id)) return this.#debug('Invalid data from remote peer: id is not a valid msg id')
|
|
// prettier-ignore
|
|
if (phase !== 0 && !payload) return this.#debug('Invalid data from remote peer: payload is missing')
|
|
|
|
switch (phase) {
|
|
case 0: {
|
|
return this.#sendLocalHave(id)
|
|
}
|
|
case 1: {
|
|
// prettier-ignore
|
|
if (!isRange(payload)) return this.#debug('Invalid data from remote peer: payload is not a range in phase 1')
|
|
|
|
return this.#sendLocalHaveAndWant(id, payload)
|
|
}
|
|
case 2: {
|
|
const { haveRange, wantRange } = payload
|
|
// prettier-ignore
|
|
if (!isRange(haveRange) || !isRange(wantRange)) return this.#debug('Invalid data from remote peer: haveRange or wantRange is not a range in phase 2')
|
|
|
|
if (isEmptyRange(haveRange)) {
|
|
// prettier-ignore
|
|
this.#debug('%s Stream IN2: received remote have-range %o and want-range %o for %s', this.#myId, haveRange, wantRange, id)
|
|
return this.#sendMsgsInRemoteWant(id, wantRange)
|
|
} else {
|
|
return this.#sendLocalWantAndInitBloom(id, haveRange, wantRange)
|
|
}
|
|
}
|
|
case 3: {
|
|
const { wantRange, bloom } = payload
|
|
// prettier-ignore
|
|
if (!isRange(wantRange)) return this.#debug('Invalid data from remote peer: wantRange is not a range in phase 3')
|
|
// prettier-ignore
|
|
if (!isBloom(bloom)) return this.#debug('Invalid data from remote peer: bloom is not a bloom in phase 3')
|
|
|
|
const haveRange = this.#remoteHave.get(id)
|
|
if (haveRange && isEmptyRange(haveRange)) {
|
|
// prettier-ignore
|
|
this.#debug('%s Stream IN3: received remote want-range %o and remembers empty have-range %o for %s', this.#myId, wantRange, haveRange, id)
|
|
return this.#sendMsgsInRemoteWant(id, wantRange)
|
|
} else {
|
|
return this.#sendInitBloomRes(id, wantRange, bloom)
|
|
}
|
|
}
|
|
case 4: {
|
|
const { bloom, msgIDs } = payload
|
|
// prettier-ignore
|
|
if (!isBloom(bloom)) return this.#debug('Invalid data from remote peer: bloom is not a bloom in phase 4')
|
|
// prettier-ignore
|
|
if (!isMsgIds(msgIDs)) return this.#debug('Invalid data from remote peer: msgIDs is not an array of msg ids in phase 4')
|
|
|
|
return this.#sendBloomReq(id, phase + 1, 1, bloom, msgIDs)
|
|
}
|
|
case 5: {
|
|
const { bloom, msgIDs } = payload
|
|
// prettier-ignore
|
|
if (!isBloom(bloom)) return this.#debug('Invalid data from remote peer: bloom is not a bloom in phase 5')
|
|
// prettier-ignore
|
|
if (!isMsgIds(msgIDs)) return this.#debug('Invalid data from remote peer: msgIDs is not an array of msg ids in phase 5')
|
|
|
|
return this.#sendBloomRes(id, phase + 1, 1, bloom, msgIDs)
|
|
}
|
|
case 6: {
|
|
const { bloom, msgIDs } = payload
|
|
// prettier-ignore
|
|
if (!isBloom(bloom)) return this.#debug('Invalid data from remote peer: bloom is not a bloom in phase 6')
|
|
// prettier-ignore
|
|
if (!isMsgIds(msgIDs)) return this.#debug('Invalid data from remote peer: msgIDs is not an array of msg ids in phase 6')
|
|
|
|
return this.#sendBloomReq(id, phase + 1, 2, bloom, msgIDs)
|
|
}
|
|
case 7: {
|
|
const { bloom, msgIDs } = payload
|
|
// prettier-ignore
|
|
if (!isBloom(bloom)) return this.#debug('Invalid data from remote peer: bloom is not a bloom in phase 7')
|
|
// prettier-ignore
|
|
if (!isMsgIds(msgIDs)) return this.#debug('Invalid data from remote peer: msgIDs is not an array of msg ids in phase 7')
|
|
|
|
return this.#sendMissingMsgsReq(id, 2, bloom, msgIDs)
|
|
}
|
|
case 8: {
|
|
const { bloom, msgs } = payload
|
|
// prettier-ignore
|
|
if (!isBloom(bloom)) return this.#debug('Invalid data from remote peer: bloom is not a bloom in phase 8')
|
|
// prettier-ignore
|
|
if (!isMsgs(msgs)) return this.#debug('Invalid data from remote peer: msgs is not an array of msgs in phase 8')
|
|
|
|
return this.#sendMissingMsgsRes(id, 2, bloom, msgs)
|
|
}
|
|
case 9: {
|
|
// prettier-ignore
|
|
if (!isMsgs(payload)) return this.#debug('Invalid data from remote peer: payload is not an array of msgs in phase 9')
|
|
|
|
// prettier-ignore
|
|
this.#debug('%s Stream IN9: got %s msgs in %s', this.#myId, payload.length, id)
|
|
return this.#consumeMissingMsgs(id, payload)
|
|
}
|
|
default: {
|
|
// prettier-ignore
|
|
return this.#debug('Invalid data from remote peer: phase is an invalid number')
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* source method
|
|
* @param {Error} err
|
|
*/
|
|
abort(err) {
|
|
this.ended = true
|
|
if (this.source && !this.source.ended) this.source.abort(err)
|
|
if (this.sink && !this.sink.ended) this.sink.end(err)
|
|
}
|
|
|
|
/**
|
|
* sink method
|
|
* @param {Error} err
|
|
*/
|
|
end(err) {
|
|
this.ended = true
|
|
if (this.source && !this.source.ended) this.source.abort(err)
|
|
if (this.sink && !this.sink.ended) this.sink.end(err)
|
|
}
|
|
}
|
|
|
|
module.exports = SyncStream
|