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shrub/pkg/arvo/app/aggregator.hoon

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:: aggregator: Azimuth L2 roll aggregator
::
:: general flow is as described below, to ensure transactions actually go
:: through once we start sending it out, in the dumbest reasonable way.
::
:: periodic timer fires:
:: if there are no pending l2 txs, do nothing.
:: else kick off tx submission flow:
:: "freeze" pending txs, store alongside nonce, then increment nonce,
:: kick off thread for sending the corresponding l1 tx:
:: if nonce doesn't match on-chain expected nonce, bail.
:: if we can't afford the tx fee, bail.
:: construct, sign, submit the l1 tx.
:: if thread bailed, retry in five minutes.
:: if thread succeeded, retry in five minutes with higher gas price.
:: when retrying, only do so if l2 txs remain in the "frozen" txs group.
:: on %tx diff from naive, remove the matching tx from the frozen group.
::
::TODO remaining general work:
:: - hook up subscription to azimuth for %tx diffs
:: - hook up thread updates/results
:: - hook up timer callbacks
:: - cache state, upate after every azimuth %fact
:: - properly support private key changes
::
::TODO questions:
:: - it's a bit weird how we just assume the raw and tx in raw-tx to match...
::
/- *aggregator
/+ naive, default-agent, ethereum, dbug, verb, lib=naive-transactions
::
::TODO /sur file for public types
|%
+$ state-0
$: %0
:: pending: the next l2 txs to be sent
:: sending: the l2 txs currently sending/awaiting l2 confirmation
::TODO should maybe key by [address nonce] instead. same for wires
:: finding: raw-tx-hash reverse lookup for sending map
:: next-nonce: next l1 nonce to use
::
pending=(list pend-tx)
sending=(map nonce:naive [next-gas-price=@ud txs=(list raw-tx:naive)])
finding=(map keccak $?(%confirmed %failed l1-tx-pointer))
next-nonce=@ud
::
:: pk: private key to send the roll
:: frequency: time to wait between sending batches (TODO fancier)
:: endpoint: ethereum rpc endpoint to use
::
pk=@
frequency=@dr
endpoint=@t
==
::
+$ action
$% [%submit force=? sig=@ tx=part-tx]
[%cancel sig=@ keccak=@]
::
[%commit ~] ::TODO maybe pk=(unit @) later
[%config frequency=@dr]
[%setkey pk=@]
[%endpoint endpoint=@t]
[%nonce nonce=@ud]
::TODO contract address, chain..?
==
::
+$ card card:agent:gall
::
::TODO config?
:: ++ contract 0xb581.01cd.3bbb.cc6f.a40b.cdb0.4bb7.1623.b5c7.d39b :: Ropsten
:: TODO: add this to action
++ contract 0x4754.03bf.4e8e.b8d0.2f71.7b0e.553f.869f.a690.425e :: Local
++ chain-id 0x539 :: '1337' (Geth private chain)
::
++ resend-time ~m5
::
++ lverb &
--
::
=| state-0
=* state -
::
%- agent:dbug
%+ verb |
^- agent:gall
::
=<
|_ =bowl:gall
+* this .
do ~(. +> bowl)
def ~(. (default-agent this %|) bowl)
::
++ on-init
^- (quip card _this)
::TODO set default frequency and endpoint?
=. frequency ~h1
[~ this]
::
++ on-save !>(state)
++ on-load
|= old=vase
^- (quip card _this)
[~ this(state !<(state-0 old))]
::
++ on-poke
|= [=mark =vase]
^- (quip card _this)
=^ cards state
?+ mark (on-poke:def mark vase)
%aggregator-action
=+ !<(poke=action vase)
(on-action:do poke)
==
[cards this]
:: +on-peek: scry paths
::TODO reevaluate wrt recent flow changes
::
:: /x/pending -> %noun (list pend-tx)
:: /x/pending/[~ship] -> %noun (list pend-tx)
:: /x/pending/[0xadd.ress] -> %noun (list pend-tx)
:: /x/tx/[0xke.ccak]/status -> %noun tx-status
:: /x/nonce/[~ship]/[0xadd.ress] -> %atom @
::
++ on-peek
|= =path
^- (unit (unit cage))
?+ path ~
[%x %pending ~] ``noun+!>(pending)
::
[%x %pending @ ~]
=* wat i.t.t.path
?~ who=(slaw %p wat)
:: by-address
::
?~ wer=(slaw %ux wat)
[~ ~]
=; pending=(list pend-tx)
``noun+!>(pending)
%+ skim pending
|= pend-tx
::TODO deduce address from sig.raw-tx ?
!!
:: by-ship
::
=; pending=(list pend-tx)
``noun+!>(pending)
%+ skim pending
|= pend-tx
=(u.who ship.from.tx.raw-tx)
::
[%x %tx @ %status ~]
?~ keccak=(slaw %ux i.t.t.path)
[~ ~]
:+ ~ ~
:- %noun
!> ^- tx-status
?^ status=(~(get by finding) u.keccak)
?@ u.status [u.status ~]
[%sending status]
::TODO potentially slow!
=; known=?
[?:(known %pending %unknown) ~]
%+ lien pending
|= [* raw-tx:naive]
=(u.keccak (hash-tx raw))
::
[%x %nonce @ @ ~]
?~ who=(slaw %p i.t.t.path)
[~ ~]
=+ proxy=i.t.t.t.path
?. ?=(proxy:naive proxy)
[~ ~]
=/ [* nas=^state:naive] pending-state:do
::TODO or should we ~ when !(~(has by points.nas) who) ?
=/ =point:naive (~(gut by points.nas) u.who *point:naive)
=+ (proxy-from-point:naive proxy point)
``atom+!>(nonce)
==
::
++ on-arvo
|= [=wire =sign-arvo]
^- (quip card _this)
?+ +<.sign-arvo (on-arvo:def wire sign-arvo)
%wake =^(cards state on-timer:do [cards this])
==
::
++ on-fail
|= [=term =tang]
::TODO if crashed during timer, set new timer? how to detect?
(on-fail:def term tang)
::
++ on-watch on-watch:def
++ on-leave on-leave:def
++ on-agent
|= [=wire =sign:agent:gall]
^- (quip card _this)
~& wire+wire
?. ?=([%send @t *] wire)
(on-agent:def wire sign)
?- -.sign
%poke-ack
?~ p.sign
%- (slog leaf+"Thread started successfully" ~)
[~ this]
%- (slog leaf+"{(trip dap.bowl)} couldn't start thread" u.p.sign)
:_ this
[(leave:spider:do wire)]~
::
%watch-ack
?~ p.sign
[~ this]
=/ =tank leaf+"{(trip dap.bowl)} couldn't start listen to thread"
%- (slog tank u.p.sign)
[~ this]
::
%kick
[~ this]
::
%fact
?+ p.cage.sign (on-agent:def wire sign)
%thread-fail
=+ !<([=term =tang] q.cage.sign)
%- (slog leaf+"{(trip dap.bowl)} failed" leaf+<term> tang)
=^ cards state
(on-thread-result:do (rash i.t.wire dem) %.n^'thread failed')
[cards this]
::
%thread-done
~& ['all submitted to' t.wire]
:: is aggregator/send thread expected to maybe return an error?
=+ !<(result=(each @ud @t) q.cage.sign)
=^ cards state
(on-thread-result:do (rash i.t.wire dem) result)
[cards this]
==
==
--
::
|_ =bowl:gall
::TODO /lib/sys.hoon?
++ sys
|%
++ b
|%
++ wait
|= [=wire =time]
^- card
[%pass wire %arvo %b %wait time]
--
--
::TODO /lib/spider.hoon?
++ spider
|%
++ start-thread
|= [=wire thread=term arg=vase]
^- (list card)
=/ tid=@ta (rap 3 thread '--' (scot %uv eny.bowl) ~)
:~ [%pass wire %agent [our.bowl %spider] %watch /thread-result/[tid]]
[%pass wire %agent [our.bowl %spider] %poke %spider-start !>([~ `tid thread arg])]
==
::
++ leave
|= =path
^- card
[%pass path %agent [our.bowl %spider] %leave ~]
--
::
++ hash-tx keccak-256:keccak:crypto
::
++ hash-raw-tx
|= =raw-tx:naive
(hash-tx raw.raw-tx)
::
++ part-tx-to-full
|= =part-tx
^- [octs tx:naive]
?+ -.part-tx !!
:: %raw [+.part-tx (decode-tx:naive +.part-tx)]
:: %don [(encode-tx:naive +.part-tx) +.part-tx]
%ful +.part-tx
==
:: +pending-state
::
:: derives tentative state from pending txs and canonical state,
:: discarding invalid pending txs in the process.
::
::TODO maybe want to cache locally, refresh on %fact from azimuth?
::
++ pending-state
^- [_pending ^state:naive]
:: load current, canonical state
::
=+ .^ nas=^state:naive
%gx
(scot %p our.bowl)
%azimuth
(scot %da now.bowl)
/nas/nas
==
:: apply our pending transactions
::TODO should also apply txs from sending map!
::
=| valid=_pending
|- ^+ [valid nas]
?~ pending [(flop valid) nas]
::
=^ gud=? nas (try-apply nas i.pending)
=? valid gud [i.pending valid]
=? finding =(gud %.n)
%- ~(put by finding)
[(hash-raw-tx raw-tx.i.pending) %failed]
$(pending t.pending)
:: +try-apply:
::
++ try-apply
|= [nas=^state:naive force=? =raw-tx:naive]
^- [success=? _nas]
?. (verify-sig-and-nonce:naive verifier:lib `@`chain-id nas raw-tx)
[force nas]
::
=^ out points.nas (increment-nonce:naive nas from.tx.raw-tx)
::
?~ nex=(receive-tx:naive nas tx.raw-tx)
[force nas]
[& +.u.nex]
::
++ on-action
|= =action
^- (quip card _state)
?- -.action
%commit on-timer
%config [~ state(frequency frequency.action)]
%nonce [~ state(next-nonce nonce.action)]
%endpoint [~ state(endpoint endpoint.action)]
::
%setkey
::TODO what about existing sending entries?
:- ~
?~ pk=(de:base16:mimes:html pk.action)
state
state(pk q.u.pk)
::
%submit
=^ success state
^- [? _state]
%^ take-tx
force.action
sig.action
(part-tx-to-full tx.action)
:: TODO: consider failure case
?> success
[~ state]
::
%cancel
!! ::TODO
==
:: +take-tx: accept submitted l2 tx into the :pending list
::TODO rewrite
::
++ take-tx
|= [force=? =raw-tx:naive]
^- [success=? _state]
=/ [nep=_pending nas=^state:naive] pending-state
=| success=?
:: TODO: actually use try-apply when proper Tx signing in place
::
:: =^ success nas
:: (try-apply nas force raw-tx)
::TODO want to notify about dropped pendings, or no? client prolly polls...
=? pending success (snoc nep [force raw-tx])
::TODO cache nas?
[success state]
:: +set-timer: %wait until next whole :frequency
::
++ set-timer
^- card
%+ wait:b:sys /timer
(mul +((div now.bowl frequency)) frequency)
:: +on-timer: every :frequency, freeze :pending txs roll and start sending it
::
++ on-timer
^- (quip card _state)
=^ cards state
?: =(~ pending) [~ state]
=/ nonce=@ud next-nonce
=: pending ~
next-nonce +(next-nonce)
::
sending
%+ ~(put by sending) nonce
[0 (turn pending tail)]
==
[(send-roll nonce) state]
[[set-timer cards] state]
:: +send-roll: start thread to submit roll from :sending to l1
::
++ send-roll
|= nonce=@ud
^- (list card)
:: if this nonce isn't in the sending queue anymore, it's done
::
?. (~(has by sending) nonce)
~? lverb [dap.bowl %done-sending nonce]
~
:: start the thread, passing in the l2 txs to use
::
::TODO should go ahead and set resend timer in case thread hangs, or nah?
%+ start-thread:spider
/send/(scot %ud nonce)
:- %aggregator-send
!> ^- rpc-send-roll
:* endpoint
contract
chain-id
pk
nonce
(~(got by sending) nonce)
==
:: +on-thread-result: await resend after thread success or failure
::
++ on-thread-result
|= [nonce=@ud result=(each @ud @t)]
^- (quip card _state)
:: update gas price for this tx in state
::
=? sending ?=(%& -.result)
%+ ~(jab by sending) nonce
(cork tail (lead p.result))
:: print error if there was one
::
~? ?=(%| -.result) [dap.bowl %send-error p.result]
:: resend the l1 tx in five minutes
::
:_ state
[(wait:b:sys /resend/(scot %ud nonce) (add resend-time now.bowl))]~
:: +on-naive-diff: process l2 tx confirmations
::
++ on-naive-diff
|= =diff:naive
^- (quip card _state)
?. ?=(%tx -.diff)
[~ state]
=/ =keccak (hash-raw-tx raw-tx.diff)
?~ wer=(~(get by finding) keccak)
[~ state]
:: if we had already seen the tx, no-op
::
?@ u.wer
~? &(?=(%confirmed u.wer) ?=(~ err.diff))
[dap.bowl %weird-double-confirm from.tx.raw-tx.diff]
[~ state]
=* nonce nonce.u.wer
:: remove the tx from the sending map
::
=. sending
?~ sen=(~(get by sending) nonce)
~& [dap.bowl %weird-double-remove]
sending
?~ nin=(find [raw-tx.diff]~ txs.u.sen)
~& [dap.bowl %weird-unknown]
sending
=. txs.u.sen (oust [u.nin 1] txs.u.sen)
?~ txs.u.sen
~? lverb [dap.bowl %done-with-nonce nonce]
(~(del by sending) nonce)
(~(put by sending) nonce u.sen)
:: update the finding map with the new status
::
=. finding
%+ ~(put by finding) keccak
?~ err.diff %confirmed
:: if we kept the forced flag around for longer, we could notify of
:: unexpected tx failures here. would that be useful? probably not?
:: ~? !forced [dap.bowl %aggregated-tx-failed-anyway err.diff]
%failed
[~ state]
::
--
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