mirror of
https://github.com/urbit/shrub.git
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244 lines
6.2 KiB
Plaintext
244 lines
6.2 KiB
Plaintext
:: btc-provider.hoon
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:: Proxy that serves a BTC full node and ElectRS address indexer
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::
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:: Subscriptions: none
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:: To Subscribers: /clients
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:: current connection state
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:: results/errors of RPC calls
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::
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/- btc
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/+ *btc-provider, dbug, default-agent
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|%
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+$ versioned-state
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$% state-0
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==
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::
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+$ state-0 [%0 =host-info whitelist=(set ship)]
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::
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+$ card card:agent:gall
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::
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--
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%- agent:dbug
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=| state-0
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=* state -
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^- agent:gall
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=<
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|_ =bowl:gall
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+* this .
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def ~(. (default-agent this %|) bowl)
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hc ~(. +> bowl)
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::
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++ on-init
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^- (quip card _this)
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~& > '%btc-provider initialized successfully'
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`this(host-info ['' connected=%.n clients=*(set ship)], whitelist *(set ship))
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++ on-save
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^- vase
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!>(state)
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++ on-load
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|= old-state=vase
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^- (quip card _this)
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~& > '%btc-provider recompiled successfully '
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`this(state !<(versioned-state old-state))
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++ on-poke
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|= [=mark =vase]
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^- (quip card _this)
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?> ?|((team:title our.bowl src.bowl) (is-client:hc src.bowl))
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=^ cards state
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?+ mark (on-poke:def mark vase)
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%btc-provider-command
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?> (team:title our.bowl src.bowl)
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(handle-command:hc !<(command vase))
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%btc-provider-action
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(handle-action:hc !<(action vase))
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==
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[cards this]
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++ on-watch
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|= pax=path
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^- (quip card _this)
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?> ?=([%clients *] pax)
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?. (is-whitelisted:hc src.bowl)
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~& >>> "btc-provider: blocked client {<src.bowl>}"
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[~[[%give %kick ~ ~]] this]
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~& > "btc-provider: added client {<src.bowl>}"
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:- do-ping:hc
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this(clients.host-info (~(put in clients.host-info) src.bowl))
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::
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++ on-leave on-leave:def
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++ on-peek on-peek:def
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++ on-agent on-agent:def
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++ on-arvo
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|= [=wire =sign-arvo]
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^- (quip card _this)
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:: check for connectivity every 30 seconds
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::
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?: ?=([%ping-timer *] wire)
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[do-ping:hc this]
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=^ cards state
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?+ +<.sign-arvo (on-arvo:def wire sign-arvo)
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%http-response
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(handle-rpc-response:hc wire client-response.sign-arvo)
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==
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[cards this]
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::
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++ on-fail on-fail:def
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--
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:: helper core
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|_ =bowl:gall
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++ handle-command
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|= comm=command
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^- (quip card _state)
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?- -.comm
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%set-credentials
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:- do-ping
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state(host-info [api-url.comm connected=%.n clients=*(set ship)])
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::
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%whitelist-clients
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`state(whitelist (~(uni in whitelist) clients.comm))
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==
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:: if not connected, only %ping action is allowed
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::
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++ handle-action
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|= act=action
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^- (quip card _state)
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?. ?|(connected.host-info =(-.body.act %ping))
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~& >>> "Not connected to RPC"
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[~[(send-update [%| %not-connected 500])] state]
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=/ ract=action:rpc
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?- -.body.act
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%address-info
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[%get-address-info address.body.act]
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::
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%tx-info
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[%get-tx-vals txid.body.act]
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::
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%raw-tx
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[%get-raw-tx txid.body.act]
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::
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%create-raw-tx
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[%create-raw-tx inputs.body.act outputs.body.act]
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::
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%ping
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[%get-block-and-fee ~]
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==
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[~[(req-card act ract)] state]
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::
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++ req-card
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|= [act=action ract=action:rpc]
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=| out=outbound-config:iris
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=/ req=request:http
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(gen-request host-info ract)
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[%pass (rpc-wire act) %arvo %i %request req out]
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:: wire structure: /action-tas/req-id/now
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::
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++ rpc-wire
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|= act=action ^- wire
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/[-.body.act]/[req-id.act]/[(scot %da now.bowl)]
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::
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++ get-req-id
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|= =wire ^- req-id
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+<.wire
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:: Handles HTTP responses from RPC servers. Parses for errors, then handles response.
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:: For actions that require collating multiple RPC calls, uses req-card to call out
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:: to RPC again if more information is required.
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::
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++ handle-rpc-response
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|= [=wire response=client-response:iris]
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^- (quip card _state)
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?. ?=(%finished -.response) `state
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=* status status-code.response-header.response
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:: handle error types: connection errors, RPC errors (in order)
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::
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=^ conn-err state
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(connection-error status)
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?^ conn-err
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:_ state(connected.host-info %.n)
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~[(send-status [%disconnected ~]) (send-update [%| u.conn-err])]
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=/ rpc-resp=response:rpc:jstd
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(get-rpc-response response)
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?. ?=([%result *] rpc-resp)
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[~[(send-update [%| [%rpc-error ~]])] state]
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:: no error, switch on wire to handle RPC data
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::
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=/ resp=response:rpc (parse-response rpc-resp)
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?+ wire ~|("Unexpected HTTP response" !!)
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[%address-info @ *]
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?> ?=([%get-address-info *] resp)
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:_ state
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~[(send-update [%.y (get-req-id wire) %address-info +.resp])]
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::
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[%tx-info @ *]
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?> ?=([%get-tx-vals *] resp)
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:_ state
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~[(send-update [%.y (get-req-id wire) %tx-info +.resp])]
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::
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[%raw-tx @ *]
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?> ?=([%get-raw-tx *] resp)
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:_ state
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~[(send-update [%.y (get-req-id wire) %raw-tx +.resp])]
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::
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[%create-raw-tx @ *]
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?> ?=([%get-raw-tx *] resp)
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:_ state
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~[(send-update [%.y (get-req-id wire) %raw-tx +.resp])]
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::
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[%ping @ *]
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?> ?=([%get-block-and-fee *] resp)
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:- ~[(send-status [%connected block.resp fee.resp])]
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state(connected.host-info %.y)
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==
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::
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++ connection-error
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|= status=@ud
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^- [(unit error) _state]
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?+ status [`[%http-error status] state]
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%200
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[~ state]
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%400
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[`[%bad-request status] state]
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%401
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[`[%no-auth status] state(connected.host-info %.n)]
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%502
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[`[%not-connected status] state(connected.host-info %.n)]
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%504
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[`[%not-connected status] state(connected.host-info %.n)]
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==
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::
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++ send-status
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|= =status ^- card
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[%give %fact ~[/clients] %btc-provider-status !>(status)]
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::
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++ send-update
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|= =update
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^- card
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=+ c=[%give %fact ~[/clients] %btc-provider-update !>(update)]
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?: ?=(%.y -.update)
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~& >> "prov. update: {<body.p.update>}"
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c
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~& >> "prov. err: {<p.update>}"
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c
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::
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++ is-whitelisted
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|= user=ship ^- ?
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?| (~(has in whitelist) user)
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=(our.bowl user)
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==
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::
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++ is-client
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|= user=ship ^- ?
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(~(has in clients.host-info) user)
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::
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++ start-ping-timer
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|= interval=@dr ^- card
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[%pass /ping-timer %arvo %b %wait (add now.bowl interval)]
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::
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++ do-ping
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^- (list card)
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:~ :* %pass /ping/[(scot %da now.bowl)] %agent
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[our.bowl %btc-provider] %poke
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%btc-provider-action !>([%blank-id %ping ~])
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==
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(start-ping-timer ~s30)
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==
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--
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