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a191d8fb8b
urbit/app/btc-wallet.hoon
timlucmiptev a191d8fb8b monolith works e2e
2021-05-26 18:30:16 -07:00

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:: btc-wallet
::
:: Scrys
:: x/scanned: (list xpub) of all scanned wallets
:: x/balance/xpub: balance (in sats) of wallet
/- *btc-wallet
/+ dbug, default-agent, *btc-wallet, bp=btc-provider, *btc, bip32
|%
++ defaults
|%
++ params
:* batch-size=20
fam-limit=10
piym-limit=3
==
++ confs 6
++ fee 100
--
::
+$ versioned-state
$% state-0
==
:: batch-size: how many addresses to send out at once for checking
:: last-block: most recent block seen by the store
::
+$ state-0
$: %0
prov=(unit provider)
walts=(map xpub:btc walt)
=btc-state
=history
curr-xpub=(unit xpub)
=scans
=params
feybs=(map ship sats)
=piym
=poym
==
::
+$ card card:agent:gall
::
--
=| state-0
=* state -
%- agent:dbug
^- agent:gall
=<
|_ =bowl:gall
+* this .
def ~(. (default-agent this %|) bowl)
hc ~(. +> bowl)
::
++ on-init
^- (quip card _this)
~& > '%btc-wallet initialized'
:- ~
%_ this
state
:* %0
~
*(map xpub:btc walt)
*^btc-state
*^history
~
*^scans
params:defaults
*(map ship sats)
*^piym
*^poym
==
==
++ on-save
^- vase
!>(state)
++ on-load
|= old-state=vase
^- (quip card _this)
~& > '%btc-wallet recompiled'
`this(state !<(versioned-state old-state))
++ on-poke
|= [=mark =vase]
^- (quip card _this)
=^ cards state
?+ mark (on-poke:def mark vase)
%btc-wallet-action
(handle-action:hc !<(action vase))
%btc-wallet-command
(handle-command:hc !<(command vase))
==
[cards this]
++ on-peek
|= pax=path
^- (unit (unit cage))
?+ pax (on-peek:def pax)
[%x %scanned ~]
``noun+!>(scanned-wallets)
::
[%x %balance @ ~]
``noun+!>((balance:hc (xpub:btc +>-.pax)))
==
++ on-agent
|= [=wire =sign:agent:gall]
^- (quip card _this)
?+ -.sign (on-agent:def wire sign)
%kick
~& >>> "kicked from prov {<src.bowl>}"
?~ prov `this
?: ?& ?=(%set-provider -.wire)
=(host.u.prov src.bowl)
==
`this(prov ~)
`this
::
%fact
=^ cards state
?+ p.cage.sign `state
%btc-provider-status
(handle-provider-status:hc !<(status:bp q.cage.sign))
::
%btc-provider-update
(handle-provider-update:hc !<(update:bp q.cage.sign))
==
[cards this]
==
::
++ on-watch on-watch:def
++ on-leave on-leave:def
++ on-arvo on-arvo:def
++ on-fail on-fail:def
--
|_ =bowl:gall
++ handle-command
|= comm=command
^- (quip card _state)
?> =(our.bowl src.bowl)
?- -.comm
%set-provider
=* sub-card
[%pass /set-provider %agent [provider.comm %btc-provider] %watch /clients]
:_ state(prov [~ provider.comm %.n])
?~ prov ~[sub-card]
:~ [%pass /set-provider %agent [host.u.prov %btc-provider] %leave ~]
sub-card
==
::
%set-current-wallet
(set-curr-xpub xpub.comm)
::
%add-wallet
?~ (~(has by walts) xpub.comm)
((slog ~[leaf+"xpub already in wallet"]) `state)
=/ w=walt (from-xpub +.comm)
=. walts (~(put by walts) xpub.comm w)
=^ c1 state (init-batches xpub.comm (dec max-gap.w))
=^ c2 state (set-curr-xpub xpub.comm)
[(weld c1 c2) state]
::
%delete-wallet
=* cw curr-xpub.state
=? cw ?&(?=(^ cw) =(u.cw xpub.comm))
~
`state(walts (~(del by walts) xpub.comm))
::
:: overwrites any payment being built in poym
::
%req-pay-address
~| "Can't pay ourselves; no comets; can't do while tx is being signed"
?< =(src.bowl payee.comm)
?< ?=(%pawn (clan:title payee.comm))
?< is-broadcasting
:_ state(poym ~, feybs (~(put by feybs) payee.comm feyb.comm))
~[(poke-us payee.comm [%gen-pay-address value.comm])]
::
%broadcast-tx
?> =(src.bowl our.bowl)
?~ prov ~|("Provider not connected" !!)
=+ signed=(to-hexb txhex.comm)
=/ tx-match=?
?~ poym %.n
=((get-id:txu (decode:txu signed)) ~(get-txid txb u.poym))
:- ?. tx-match
((slog leaf+"txid didn't match txid in wallet") ~)
~[(poke-provider [%broadcast-tx signed])]
?. tx-match state
?~ poym state
state(signed-tx.u.poym `signed)
==
::
++ handle-action
|= act=action
^- (quip card _state)
?- -.act
%add-poym-raw-txi
?> =(src.bowl our.bowl)
?~ poym `state
=. txis.u.poym
(update-poym-txis txis.u.poym +.act)
:_ state
=+ pb=~(to-psbt txb u.poym)
?~ pb ~
=+ vb=~(vbytes txb u.poym)
=+ fee=~(fee txb u.poym)
~& >> "{<vb>} vbytes, {<(div fee vb)>} sats/byte, {<fee>} sats fee"
%- (slog [%leaf "PSBT: {<u.pb>}"]~)
~
:: delete an incoming/outgoing payment when we see it included in a tx
::
%close-pym
?> =(src.bowl our.bowl)
=^ cards state
?. included.ti.act
`state
?: (~(has by pend.piym) txid.ti.act)
(piym-to-history ti.act)
?: (poym-has-txid txid.ti.act)
(poym-to-history ti.act)
`state
:- cards
(handle-tx-info ti.act)
::
%fail-broadcast-tx
?> =(src.bowl our.bowl)
~& >>> "%fail-broadcast-tx"
`state(poym ~)
::
%succeed-broadcast-tx
?> =(src.bowl our.bowl)
~& > "%succeed-broadcast-tx"
:_ state
?~ prov ~
:- (poke-provider [%tx-info txid.act])
?~ poym ~
?~ payee.u.poym ~
:_ ~
%- poke-us
:* u.payee.u.poym
%expect-payment
txid.act
value:(snag 0 txos.u.poym)
==
:: can't pay yourself; comets can't pay (could spam address requests)
:: must have curr-wallet set
:: reuses payment address for ship if ship in piym already
::
%gen-pay-address
~| "Can't pay ourselves; no comets"
?< =(src.bowl our.bowl)
?< ?=(%pawn (clan:title src.bowl))
=^ cards state
(reuse-address src.bowl value.act)
?^ cards [cards state]
=+ f=(fam src.bowl)
=+ n=(~(gut by num-fam.piym) f 0)
?~ curr-xpub ~|("btc-walle: no curr-xpub set" !!)
?: (gte n fam-limit.params)
~|("More than {<fam-limit.params>} addresses for moons + planet" !!)
=. state state(num-fam.piym (~(put by num-fam.piym) f +(n)))
|^
=^ a=address state
(generate-address u.curr-xpub %0)
:- ~[(poke-us src.bowl [%recv-pay-address a value.act])]
state(ps.piym (~(put by ps.piym) src.bowl [~ u.curr-xpub a src.bowl value.act]))
::
++ generate-address
|= [=xpub =chyg]
=/ uw=(unit walt) (~(get by walts) xpub)
?: ?|(?=(~ uw) ?!(scanned.u.uw))
~|("no wallet with xpub or wallet not scanned yet" !!)
=/ [addr=address =idx w=walt]
~(gen-address wad u.uw chyg)
[addr state(walts (~(put by walts) xpub w))]
--
::
%recv-pay-address
?: =(src.bowl our.bowl) ~|("Can't pay ourselves" !!)
?: is-broadcasting ~|("Broadcasting a transaction" !!)
?~ curr-xpub ~|("btc-wallet-hook: no curr-xpub set" !!)
=+ feyb=(~(gut by feybs) src.bowl ?~(fee.btc-state fee:defaults u.fee.btc-state))
|^
=^ tb=(unit txbu) state
(generate-txbu u.curr-xpub `src.bowl feyb ~[[address.act value.act ~]])
:_ state(poym tb)
?~ tb ~
%+ turn txis.u.tb
|=(=txi (poke-provider [%raw-tx txid.utxo.txi]))
::
++ generate-txbu
|= [=xpub payee=(unit ship) feyb=sats txos=(list txo)]
^- [(unit txbu) _state]
=/ uw (~(get by walts) xpub)
?: ?|(?=(~ uw) ?!(scanned.u.uw))
~|("no wallet with xpub or wallet not scanned yet" !!)
=/ [tb=(unit txbu) chng=(unit sats)]
%~ with-change sut
[u.uw eny.bowl block.btc-state payee feyb txos]
?~ tb ((slog ~[leaf+"insufficient balance or not enough confirmed balance"]) [tb state])
:: if no change, return txbu; else add change output to txbu
::
?~ chng [tb state]
=/ [addr=address:btc =idx w=walt]
~(nixt-address wad u.uw %1)
:- `(~(add-output txb u.tb) addr u.chng `(~(hdkey wad w %1) idx))
state(walts (~(put by walts) xpub w))
--
::
:: %expect-payment
:: - check that payment is in piym
:: - replace pend.payment with incoming txid (lock)
:: - add txid to pend.piym
:: - request tx-info from provider
::
%expect-payment
|^
=+ pay=(~(get by ps.piym) src.bowl)
~| "%expect-payment: matching payment not in piym"
?~ pay !!
?> (piym-matches u.pay)
:_ (update-pend-piym txid.act u.pay(pend `txid.act))
?~ prov ~
~[(poke-provider [%tx-info txid.act])]
::
++ piym-matches
|= p=payment
?& =(payer.p src.bowl)
=(value.p value.act)
==
--
==
::
:: +handle-provider-status: handle connectivity updates from provider
:: - retry pend.piym on any %connected event, since we're checking mempool
:: - if status is %connected, retry all pending address lookups
:: - only retry all if previously disconnected
:: - if block is updated, retry all address reqs
::
++ handle-provider-status
|= s=status:bp
^- (quip card _state)
|^
?~ prov `state
?. =(host.u.prov src.bowl) `state
?- -.s
%new-block
(connected u.prov block.s fee.s `blockhash.s `blockfilter.s)
::
%connected
(connected u.prov block.s fee.s ~ ~)
::
%disconnected
`state(prov `[host.u.prov %.n])
==
::
++ connected
|= $: p=provider
block=@ud
fee=(unit sats)
blockhash=(unit hexb)
blockfilter=(unit hexb)
==
^- (quip card _state)
:_ %_ state
prov `[host.p %.y]
btc-state [block fee now.bowl]
==
?: ?|(?!(connected.p) (lth block.btc-state block))
;:(weld retry-pend-piym retry-addrs retry-txs retry-scans)
retry-pend-piym
--
::
++ handle-provider-update
|= upd=update:bp
^- (quip card _state)
?. ?=(%.y -.upd) `state
?- -.p.upd
%address-info
(handle-address-info address.p.upd utxos.p.upd used.p.upd)
::
%tx-info
:- ~[(poke-us our.bowl [%close-pym info.p.upd])]
(handle-tx-info info.p.upd)
::
%raw-tx
:_ state
~[(poke-us our.bowl [%add-poym-raw-txi +.p.upd])]
::
%broadcast-tx
?~ poym `state
?. =(~(get-txid txb u.poym) txid.p.upd)
`state
:_ state
?: ?|(broadcast.p.upd included.p.upd)
~[(poke-us our.bowl [%succeed-broadcast-tx txid.p.upd])]
~[(poke-us our.bowl [%fail-broadcast-tx txid.p.upd])]
==
::
++ handle-tx-info
|= ti=info:tx
^- _state
|^
=/ h (~(get by history) txid.ti)
=/ our-addrs=(set address) :: all our addresses in inputs/outputs of tx
%- sy
%+ skim
%+ turn (weld inputs.ti outputs.ti)
|=(=val:tx address.val)
is-our-address
?: =(0 ~(wyt in our-addrs)) state
=/ =xpub
xpub.w:(need (address-coords (snag 0 ~(tap in our-addrs)) ~(val by walts)))
?~ h :: addresses in wallets, but tx not in history
=. history
%+ ~(put by history) txid.ti
(mk-hest xpub our-addrs)
state
?. included.ti :: tx in history, but not in mempool/blocks
state(history (~(del by history) txid.ti))
%_ state
history
%+ ~(put by history) txid.ti
u.h(confs confs.ti, recvd recvd.ti)
==
::
++ mk-hest
:: has tx-info
|= [=xpub our-addrs=(set address)]
^- hest
:* xpub
txid.ti
confs.ti
recvd.ti
(turn inputs.ti |=(v=val:tx (is-our-ship our-addrs v)))
(turn outputs.ti |=(v=val:tx (is-our-ship our-addrs v)))
==
::
++ is-our-ship
|= [as=(set address:btc) v=val:tx:btc]
^- [=val:tx s=(unit ship)]
[v ?:((~(has in as) address.v) `our.bowl ~)]
::
++ is-our-address
|=(a=address ?=(^ (address-coords a ~(val by walts))))
--
++ set-curr-xpub
|= =xpub
^- (quip card _state)
?~ (find ~[xpub] scanned-wallets) `state
`state(curr-xpub `xpub)
::
::
:: Scan Logic
::
:: Algorithm
:: Initiate a batch for each chyg, with max-gap idxs in it
:: Watch all of the addresses made from idxs
:: Request info on all addresses from provider
:: When an %address-info comes back:
:: - remove that idx from todo.batch
:: - run check-scan to check whether that chyg is done
:: - if it isn't, refill it with max-gap idxs to scan
::
:: +handle-address-info: updates scans and wallet with address info
::
++ handle-address-info
|= [=address utxos=(set utxo) used=?]
^- (quip card _state)
=/ ac (address-coords address ~(val by walts))
?~ ac `state
=/ [w=walt =chyg =idx] u.ac
=. walts
%+ ~(put by walts) xpub.w
%+ ~(update-address wad w chyg)
address
[used chyg idx utxos]
:: if the wallet+chyg is being scanned, update the scan batch
::
=/ b (~(get by scans) [xpub.w chyg])
?~ b `state
=. scans
(del-scanned u.b(has-used ?|(used has-used.u.b)) xpub.w chyg idx)
?: empty:(scan-status xpub.w chyg)
(check-scan xpub.w)
`state
:: +req-scan
:: - adds addresses in batch to wallet's watch map as un-used addresses
:: - returns provider %address-info request cards
::
++ req-scan
|= [b=batch =xpub =chyg]
^- (quip card _state)
=/ w=walt (~(got by walts) xpub)
=/ as=(list [address [? ^chyg idx (set utxo)]])
%+ turn ~(tap in todo.b)
|=(=idx [(~(mk-address wad w chyg) idx) [%.n chyg idx *(set utxo)]])
=. w
|- ?~ as w
$(as t.as, w (~(update-address wad w chyg) -.i.as +.i.as))
:- (turn as |=([a=address *] (poke-provider [%address-info a])))
%= state
scans
(~(put by scans) [xpub chyg] b)
walts
(~(put by walts) xpub w)
==
::
++ scan-status
|= [=xpub =chyg]
^- [empty=? done=?]
=/ b=batch (~(got by scans) [xpub chyg])
=/ empty=? =(0 ~(wyt in todo.b))
:- empty
?&(empty ?!(has-used.b))
::
++ init-batches
|= [=xpub endpoint=idx]
^- (quip card _state)
=/ b=batch
[(sy (gulf 0 endpoint)) endpoint %.n]
=^ cards0 state (req-scan b xpub %0)
=^ cards1 state (req-scan b xpub %1)
[(weld cards0 cards1) state]
:: +bump-batch
:: if the batch is done but the wallet isn't done scanning,
:: returns new address requests and updated batch
::
++ bump-batch
|= [=xpub =chyg]
^- (quip card _state)
=/ b=batch (~(got by scans) xpub chyg)
=/ s (scan-status xpub chyg)
?. ?&(empty.s ?!(done.s))
`state
=/ w=walt (~(got by walts) xpub)
=/ newb=batch
:* (sy (gulf +(endpoint.b) (add endpoint.b max-gap.w)))
(add endpoint.b max-gap.w)
%.n
==
(req-scan newb xpub chyg)
:: +del-scanned: delete scanned idxs
::
++ del-scanned
|= [b=batch =xpub =chyg to-delete=idx]
^- ^scans
%+ ~(put by scans) [xpub chyg]
b(todo (~(del in todo.b) to-delete))
:: delete the xpub from scans and set wallet to scanned
::
++ end-scan
|= [=xpub]
^- (quip card _state)
=/ w=walt (~(got by walts) xpub)
=. scans (~(del by scans) [xpub %0])
=. scans (~(del by scans) [xpub %1])
%- (slog ~[leaf+"Scanned xpub {<xpub>}"])
=. state state(walts (~(put by walts) xpub w(scanned %.y)))
(set-curr-xpub xpub)
:: +check-scan: initiate a scan if one hasn't started
:: check status of scan if one is running
::
++ check-scan
|= =xpub
^- (quip card _state)
=/ s0 (scan-status xpub %0)
=/ s1 (scan-status xpub %1)
?: ?&(empty.s0 done.s0 empty.s1 done.s1)
(end-scan xpub)
=^ cards0=(list card) state
(bump-batch xpub %0)
=^ cards1=(list card) state
(bump-batch xpub %1)
[(weld cards0 cards1) state]
::
::
:: piym/poym
:: Utilities for Incoming/Outgoing Payments
::
::
:: +reuse-address
:: - if piym already has address for payer, replace address and return to payer
:: - if payment is pending, crash. Shouldn't be getting an address request
::
++ reuse-address
|= [payer=ship value=sats]
^- (quip card _state)
=+ p=(~(get by ps.piym) payer)
?~ p `state
?^ pend.u.p ~|("%gen-address: {<payer>} already has pending payment to us" !!)
=+ newp=u.p(value value)
:_ state(ps.piym (~(put by ps.piym) payer newp))
~[(poke-us payer [%recv-pay-address address.newp value])]
::
++ poym-has-txid
|= txid=hexb
^- ?
?~ poym %.n
?~ signed-tx.u.poym %.n
=(txid (get-id:txu (decode:txu u.signed-tx.u.poym)))
:: +poym-to-history:
:: - checks whether poym has a signed tx
:: - checks whether the txid matches that signed tx
:: - if not, skip
:: - clears poym
:: - returns card that adds hest to history
::
++ poym-to-history
|= ti=info:tx
^- (quip card _state)
|^
?~ poym `state
?~ signed-tx.u.poym `state
?. (poym-has-txid txid.ti)
`state
=+ vout=(get-vout txos.u.poym)
?~ vout ~|("poym-to-history: poym should always have an output" !!)
:- ~
%= state
poym ~
history
(add-history-entry ti xpub.u.poym our.bowl payee.u.poym u.vout)
==
::
++ get-vout
|= txos=(list txo)
^- (unit @ud)
=| idx=@ud
|- ?~ txos ~
?~ hk.i.txos `idx
$(idx +(idx), txos t.txos)
--
:: +piym-to-history
:: - checks whether txid in pend.piym
:: - checks whether ti has a matching value output to piym
:: - if no match found, just deletes pend.piym with this tx
:: stops peer from spamming txids
:: - returns card that adds hest to history
::
++ piym-to-history
|= ti=info:tx
|^ ^- (quip card _state)
=+ pay=(~(get by pend.piym) txid.ti)
?~ pay `state
:: if no matching output in piym, delete from pend.piym to stop DDOS of txids
::
=+ vout=(get-vout value.u.pay)
?~ vout
`(del-pend-piym txid.ti)
=. state (del-all-piym txid.ti payer.u.pay)
`state(history (add-history-entry [ti xpub.u.pay payer.u.pay `our.bowl u.vout]))
::
++ get-vout
|= value=sats
^- (unit @ud)
=| idx=@ud
=+ os=outputs.ti
|- ?~ os ~
?: =(value.i.os value)
`idx
$(os t.os, idx +(idx))
::
::
++ del-pend-piym
|= txid=hexb
^- _state
state(pend.piym (~(del by pend.piym) txid.ti))
::
++ del-all-piym
|= [txid=hexb payer=ship]
^- _state
=+ nf=(~(gut by num-fam.piym) payer 1)
%= state
pend.piym (~(del by pend.piym) txid)
ps.piym (~(del by ps.piym) payer)
num-fam.piym (~(put by num-fam.piym) payer (dec nf))
==
--
::
++ add-history-entry
|= [ti=info:tx =xpub payer=ship payee=(unit ship) vout=@ud]
^- ^history
=/ =hest
:* xpub
txid.ti
confs.ti
recvd.ti
(turn inputs.ti |=(i=val:tx [i `payer]))
%+ turn outputs.ti
|= o=val:tx
?: =(pos.o vout) :: check whether this is the output that went to payee
[o payee]
[o `payer]
==
(~(put by history) txid.hest hest)
:: +fam: planet parent if s is a moon
::
++ fam
|= s=ship
^- ship
?. =(%earl (clan:title s)) s
(sein:title our.bowl now.bowl s)
:: +update-pend.piym
:: - set pend.payment to txid (lock)
:: - add txid to pend.piym
::
++ update-pend-piym
|= [txid=hexb p=payment]
^- _state
?~ pend.p ~|("update-pend-piym: no pending payment" !!)
%= state
ps.piym (~(put by ps.piym) payer.p p)
pend.piym (~(put by pend.piym) txid p)
==
::
:: +update-poym-txis:
:: update outgoing payment with a rawtx, if the txid is in poym's txis
::
++ update-poym-txis
|= [txis=(list txi) txid=hexb rt=hexb]
^- (list txi)
=| i=@
|- ?: (gte i (lent txis)) txis
=/ ith=txi (snag i txis)
=? txis =(txid txid.utxo.ith)
(snap txis i `txi`ith(ur `rt))
$(i +(i))
::
::
:: Card Builders and Pokers
::
::
++ retry-scans
^- (list card)
%- zing
%+ turn ~(tap by scans)
|= [[=xpub =chyg] =batch]
-:(req-scan batch xpub chyg)
:: +retry-addrs: get info on addresses with unconfirmed UTXOs
::
++ retry-addrs
^- (list card)
%- zing
%+ turn ~(val by walts)
|= w=walt
^- (list card)
%+ murn ~(tap by wach.w)
|= [a=address ad=addi]
?: %+ levy ~(tap in utxos.ad)
|=(u=utxo (gth height.u (sub block.btc-state confs.w)))
~
`(poke-provider [%address-info a])
:: +retry-txs: get info on txs without enough confirmations
::
++ retry-txs
^- (list card)
%+ murn ~(tap by history)
|= [=txid =hest]
=/ w=(unit walt) (~(get by walts) xpub.hest)
=/ nconfs=@ud ?^(w confs.u.w confs:defaults)
?: (gte confs.hest nconfs) ~
`(poke-provider [%tx-info txid])
::
++ retry-poym
^- (list card)
?~ poym ~
%+ weld
?~ signed-tx.u.poym ~
~[(poke-provider [%broadcast-tx u.signed-tx.u.poym])]
%+ turn txis.u.poym
|= =txi
(poke-provider [%raw-tx ~(get-txid txb u.poym)])
:: +retry-pend-piym: check whether txids in pend-piym are in mempool
::
++ retry-pend-piym
^- (list card)
%+ turn ~(tap in ~(key by pend.piym))
|=(=txid (poke-provider [%tx-info txid]))
::
++ poke-provider
|= [act=action:bp]
^- card
?~ prov ~|("provider not set" !!)
:* %pass /[(scot %da now.bowl)]
%agent [host.u.prov %btc-provider]
%poke %btc-provider-action !>([act])
==
::
++ poke-us
|= [target=ship act=action]
^- card
:* %pass /[(scot %da now.bowl)] %agent
[target %btc-wallet] %poke
%btc-wallet-action !>(act)
==
::
++ is-broadcasting
^- ?
?~ poym %.n
?=(^ signed-tx.u.poym)
::
:: Scry Helpers
::
++ scanned-wallets
^- (list xpub)
%+ murn ~(tap by walts)
|= [=xpub w=walt]
^- (unit ^xpub)
?: scanned.w `xpub ~
::
++ balance
|= =xpub
^- (unit sats)
=/ w (~(get by walts) xpub)
?~ w ~
=/ values=(list sats)
%+ turn ~(val by wach.u.w)
|= =addi ^- sats
%+ roll
%+ turn ~(tap by utxos.addi)
|=(=utxo value.utxo)
add
`(roll values add)
::
--
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