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306 lines
8.4 KiB
Plaintext
306 lines
8.4 KiB
Plaintext
/- spider
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/+ strandio, *azimuth
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=, strand=strand:spider
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=, able:jael
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|%
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+$ pending-udiffs (map number:block udiffs:point)
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+$ app-state
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$: %2
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url=@ta
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=number:block
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=pending-udiffs
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blocks=(list block)
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whos=(set ship)
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==
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+$ in-poke-data
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$% [%listen whos=(list ship) =source:jael]
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[%watch url=@ta]
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==
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+$ in-peer-data ~
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--
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::
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:: Async helpers
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::
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|%
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++ topics
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|= ships=(set ship)
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^- (list ?(@ux (list @ux)))
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:: The first topic should be one of these event types
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::
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:- => azimuth-events:azimuth
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:~ broke-continuity
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changed-keys
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lost-sponsor
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escape-accepted
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==
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:: If we're looking for a specific set of ships, specify them as
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:: the second topic. Otherwise don't specify the second topic so
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:: we will match all ships.
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::
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?: =(~ ships)
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~
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[(turn ~(tap in ships) ,@) ~]
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::
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++ get-logs-by-hash
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|= [url=@ta whos=(set ship) =hash:block]
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=/ m (strand udiffs:point)
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^- form:m
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;< =json bind:m
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%+ request-rpc url
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:* `'logs by hash'
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%eth-get-logs-by-hash
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hash
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~[azimuth:contracts:azimuth]
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(topics whos)
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==
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=/ event-logs=(list event-log:rpc:ethereum)
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(parse-event-logs:rpc:ethereum json)
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=/ =udiffs:point (event-logs-to-udiffs event-logs)
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(pure:m udiffs)
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::
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++ get-logs-by-range
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|= [url=@ta whos=(set ship) =from=number:block =to=number:block]
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=/ m (strand udiffs:point)
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^- form:m
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;< =json bind:m
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%+ request-rpc url
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:* `'logs by range'
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%eth-get-logs
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`number+from-number
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`number+to-number
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~[azimuth:contracts:azimuth]
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(topics whos)
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==
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=/ event-logs=(list event-log:rpc:ethereum)
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(parse-event-logs:rpc:ethereum json)
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=/ =udiffs:point (event-logs-to-udiffs event-logs)
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(pure:m udiffs)
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::
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++ event-logs-to-udiffs
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|= event-logs=(list =event-log:rpc:ethereum)
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^- =udiffs:point
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%+ murn event-logs
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|= =event-log:rpc:ethereum
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^- (unit [=ship =udiff:point])
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?~ mined.event-log
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~
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?: removed.u.mined.event-log
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~& [%removed-log event-log]
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~
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=/ =id:block [block-hash block-number]:u.mined.event-log
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=, azimuth-events:azimuth
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=, abi:ethereum
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?: =(broke-continuity i.topics.event-log)
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=/ who=@ (decode-topics t.topics.event-log ~[%uint])
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=/ num=@ (decode-results data.event-log ~[%uint])
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`[who id %rift num]
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?: =(changed-keys i.topics.event-log)
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=/ who=@ (decode-topics t.topics.event-log ~[%uint])
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=+ ^- [enc=octs aut=octs sut=@ud rev=@ud]
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%+ decode-results data.event-log
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~[[%bytes-n 32] [%bytes-n 32] %uint %uint]
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`[who id %keys rev sut (pass-from-eth:azimuth enc aut sut)]
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?: =(lost-sponsor i.topics.event-log)
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=+ ^- [who=@ pos=@]
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(decode-topics t.topics.event-log ~[%uint %uint])
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`[who id %spon ~]
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?: =(escape-accepted i.topics.event-log)
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=+ ^- [who=@ wer=@]
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(decode-topics t.topics.event-log ~[%uint %uint])
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`[who id %spon `wer]
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~& [%bad-topic event-log]
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~
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::
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++ jael-update
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|= =udiffs:point
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=/ m (strand ,~)
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|- ^- form:m
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=* loop $
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?~ udiffs
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(pure:m ~)
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=/ =path /(scot %p ship.i.udiffs)
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=/ cards
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:~ [%give %fact `/ %azimuth-udiff !>(i.udiffs)]
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[%give %fact `path %azimuth-udiff !>(i.udiffs)]
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==
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;< ~ bind:m (send-raw-cards:strandio cards)
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loop(udiffs t.udiffs)
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::
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++ handle-azimuth-tracker-poke
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=/ m (strand ,in-poke-data)
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^- form:m
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;< =vase bind:m
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((handle:strandio ,vase) (take-poke:strandio %azimuth-tracker-poke))
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=/ =in-poke-data !<(in-poke-data vase)
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(pure:m in-poke-data)
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--
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::
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:: Main loop
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::
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|%
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::
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:: Switch eth node
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::
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++ handle-watch
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|= state=app-state
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=/ m (strand ,app-state)
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^- form:m
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;< =in-poke-data bind:m handle-azimuth-tracker-poke
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?. ?=(%watch -.in-poke-data)
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ignore:strandio
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(pure:m state(url url.in-poke-data))
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::
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:: Send %listen to jael
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::
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++ handle-listen
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|= state=app-state
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=/ m (strand ,app-state)
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^- form:m
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;< =in-poke-data bind:m handle-azimuth-tracker-poke
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?. ?=(%listen -.in-poke-data)
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ignore:strandio
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=/ card
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[%pass /lo %arvo %j %listen (silt whos.in-poke-data) source.in-poke-data]
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;< ~ bind:m (send-raw-card:strandio card)
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(pure:m state)
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::
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:: Start watching a node
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::
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++ handle-peer
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|= state=app-state
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=/ m (strand ,app-state)
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;< =path bind:m ((handle:strandio ,path) take-watch:strandio)
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=: number.state 0
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pending-udiffs.state *pending-udiffs
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blocks.state *(list block)
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whos.state
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=/ who=(unit ship) ?~(path ~ `(slav %p i.path))
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?~ who
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~
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(~(put in whos.state) u.who)
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==
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::
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;< ~ bind:m send-cancel-request:strandio
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(get-updates state)
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::
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:: Get more blocks
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::
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++ handle-wake
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|= state=app-state
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=/ m (strand ,app-state)
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^- form:m
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;< ~ bind:m ((handle:strandio ,~) (take-wake:strandio ~))
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(get-updates state)
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::
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:: Get updates since last checked
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::
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++ get-updates
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|= state=app-state
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=/ m (strand ,app-state)
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^- form:m
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;< =latest=block bind:m (get-latest-block url.state)
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;< state=app-state bind:m (zoom state number.id.latest-block)
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|- ^- form:m
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=* walk-loop $
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?: (gth number.state number.id.latest-block)
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;< now=@da bind:m get-time:strandio
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;< ~ bind:m (send-wait:strandio (add now ~m5))
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(pure:m state)
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;< =block bind:m (get-block-by-number url.state number.state)
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;< [=new=pending-udiffs new-blocks=(lest ^block)] bind:m
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%- take-block
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[url.state whos.state pending-udiffs.state block blocks.state]
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=: pending-udiffs.state new-pending-udiffs
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blocks.state new-blocks
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number.state +(number.id.i.new-blocks)
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==
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walk-loop
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::
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:: Process a block, detecting and handling reorgs
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::
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++ take-block
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|= [url=@ta whos=(set ship) =a=pending-udiffs =block blocks=(list block)]
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=/ m (strand ,[pending-udiffs (lest ^block)])
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^- form:m
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?: &(?=(^ blocks) !=(parent-hash.block hash.id.i.blocks))
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(rewind url a-pending-udiffs block blocks)
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;< =b=pending-udiffs bind:m
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(release-old-events a-pending-udiffs number.id.block)
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;< =new=udiffs:point bind:m (get-logs-by-hash url whos hash.id.block)
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=. b-pending-udiffs (~(put by b-pending-udiffs) number.id.block new-udiffs)
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(pure:m b-pending-udiffs block blocks)
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::
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:: Release events if they're more than 30 blocks ago
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::
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++ release-old-events
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|= [=pending-udiffs =number:block]
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=/ m (strand ,^pending-udiffs)
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^- form:m
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=/ rel-number (sub number 30)
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=/ =udiffs:point (~(get ja pending-udiffs) rel-number)
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;< ~ bind:m (jael-update udiffs)
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(pure:m (~(del by pending-udiffs) rel-number))
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::
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:: Reorg detected, so rewind until we're back in sync
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::
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++ rewind
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|= [url=@ta =pending-udiffs =block blocks=(list block)]
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=/ m (strand ,[^pending-udiffs (lest ^block)])
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|- ^- form:m
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=* loop $
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?~ blocks
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(pure:m pending-udiffs block blocks)
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?: =(parent-hash.block hash.id.i.blocks)
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(pure:m pending-udiffs block blocks)
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;< =next=^block bind:m (get-block-by-number url number.id.i.blocks)
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?: =(~ pending-udiffs)
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;< ~ bind:m (disavow block)
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loop(block next-block, blocks t.blocks)
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=. pending-udiffs (~(del by pending-udiffs) number.id.block)
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loop(block next-block, blocks t.blocks)
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::
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:: Tell subscribers there was a deep reorg
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::
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++ disavow
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|= =block
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=/ m (strand ,~)
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^- form:m
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(jael-update [*ship id.block %disavow ~]~)
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::
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:: Zoom forward to near a given block number.
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::
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:: Zooming doesn't go forward one block at a time. As a
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:: consequence, it cannot detect and handle reorgs. Only use it
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:: at a safe distance -- 500 blocks ago is probably sufficient.
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::
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++ zoom
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|= [state=app-state =latest=number:block]
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=/ m (strand ,app-state)
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^- form:m
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=/ zoom-margin=number:block 100
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?: (lth latest-number (add number.state zoom-margin))
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(pure:m state)
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=/ to-number=number:block (sub latest-number zoom-margin)
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;< =udiffs:point bind:m
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(get-logs-by-range url.state whos.state number.state to-number)
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;< ~ bind:m (jael-update udiffs)
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=. number.state +(to-number)
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=. blocks.state ~
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(pure:m state)
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--
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::
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:: Main
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::
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^- thread:spider
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|= args=vase
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=/ m (strand ,vase)
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^- form:m
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;< ~ bind:m
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%- (main-loop:strandio ,app-state)
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:~ handle-listen
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handle-watch
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handle-wake
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handle-peer
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==
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(pure:m *vase)
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