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shrub/pkg/base-dev/lib/ethio.hoon

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:: ethio: Asynchronous Ethereum input/output functions.
::
/- rpc=json-rpc
/+ ethereum, strandio
=, ethereum-types
=, jael
::
=> |%
+$ topics (list ?(@ux (list @ux)))
--
|%
:: +request-rpc: send rpc request, with retry
::
++ request-rpc
|= [url=@ta id=(unit @t) req=request:rpc:ethereum]
=/ m (strand:strandio ,json)
^- form:m
;< res=(list [id=@t =json]) bind:m
(request-batch-rpc-strict url [id req]~)
?: ?=([* ~] res)
(pure:m json.i.res)
%+ strand-fail:strandio
%unexpected-multiple-results
[>(lent res)< ~]
:: +request-batch-rpc-strict: send rpc requests, with retry
::
:: sends a batch request. produces results for all requests in the batch,
:: but only if all of them are successful.
::
++ request-batch-rpc-strict
|= [url=@ta reqs=(list [id=(unit @t) req=request:rpc:ethereum])]
|^ %+ (retry:strandio results)
`10
attempt-request
::
+$ results (list [id=@t =json])
::
++ attempt-request
=/ m (strand:strandio ,(unit results))
^- form:m
;< responses=(list response:rpc) bind:m
(request-batch-rpc-loose url reqs)
=- ?~ err
(pure:m `res)
(pure:m ~)
%+ roll responses
|= $: rpc=response:rpc
[res=results err=(list [id=@t code=@t message=@t])]
==
?: ?=(%error -.rpc)
[res [+.rpc err]]
?. ?=(%result -.rpc)
[res [['' 'ethio-rpc-fail' (crip <rpc>)] err]]
[[+.rpc res] err]
--
:: +request-batch-rpc-loose: send rpc requests, with retry
::
:: sends a batch request. produces results for all requests in the batch,
:: including the ones that are unsuccessful.
::
++ request-batch-rpc-loose
|= [url=@ta reqs=(list [id=(unit @t) req=request:rpc:ethereum])]
|^ %+ (retry:strandio results)
`10
attempt-request
::
+$ result response:rpc
+$ results (list response:rpc)
::
++ attempt-request
=/ m (strand:strandio ,(unit results))
^- form:m
=/ =request:http
:* method=%'POST'
url=url
header-list=['Content-Type'^'application/json' ~]
::
^= body
%- some %- as-octt:mimes:html
%- en-json:html
a+(turn reqs request-to-json:rpc:ethereum)
==
;< ~ bind:m
(send-request:strandio request)
;< rep=(unit client-response:iris) bind:m
take-maybe-response:strandio
?~ rep
(pure:m ~)
(parse-responses u.rep)
::
++ parse-responses
|= =client-response:iris
=/ m (strand:strandio ,(unit results))
^- form:m
?> ?=(%finished -.client-response)
?~ full-file.client-response
(pure:m ~)
=/ body=@t q.data.u.full-file.client-response
=/ jon=(unit json) (de-json:html body)
?~ jon
(pure:m ~)
=/ array=(unit (list response:rpc))
((ar:dejs-soft:format parse-one-response) u.jon)
?~ array
(strand-fail:strandio %rpc-result-incomplete-batch >u.jon< ~)
(pure:m array)
::
++ parse-one-response
|= =json
^- (unit response:rpc)
?. &(?=([%o *] json) (~(has by p.json) 'error'))
=/ res=(unit [@t ^json])
%. json
=, dejs-soft:format
(ot id+so result+some ~)
?~ res ~
`[%result u.res]
~| parse-one-response=json
=/ error=(unit [id=@t ^json code=@ta mssg=@t])
%. json
=, dejs-soft:format
:: A 'result' member is present in the error
:: response when using ganache, even though
:: that goes against the JSON-RPC spec
::
(ot id+so result+some error+(ot code+no message+so ~) ~)
?~ error ~
=* err u.error
`[%error id.err code.err mssg.err]
--
::
:: +read-contract: calls a read function on a contract, produces result hex
::
++ read-contract
|= [url=@t req=proto-read-request:rpc:ethereum]
=/ m (strand:strandio ,@t)
;< res=(list [id=@t res=@t]) bind:m
(batch-read-contract-strict url [req]~)
?: ?=([* ~] res)
(pure:m res.i.res)
%+ strand-fail:strandio
%unexpected-multiple-results
[>(lent res)< ~]
:: +batch-read-contract-strict: calls read functions on contracts
::
:: sends a batch request. produces results for all requests in the batch,
:: but only if all of them are successful.
::
++ batch-read-contract-strict
|= [url=@t reqs=(list proto-read-request:rpc:ethereum)]
|^ =/ m (strand:strandio ,results)
^- form:m
;< res=(list [id=@t =json]) bind:m
%+ request-batch-rpc-strict url
(turn reqs proto-to-rpc)
=+ ^- [=results =failures]
(roll res response-to-result)
?~ failures (pure:m results)
(strand-fail:strandio %batch-read-failed-for >failures< ~)
::
+$ results (list [id=@t res=@t])
+$ failures (list [id=@t =json])
::
++ proto-to-rpc
|= proto-read-request:rpc:ethereum
^- [(unit @t) request:rpc:ethereum]
:- id
:+ %eth-call
^- call:rpc:ethereum
[~ to ~ ~ ~ `tape`(encode-call:rpc:ethereum function arguments)]
[%label %latest]
::
++ response-to-result
|= [[id=@t =json] =results =failures]
^+ [results failures]
?: ?=(%s -.json)
[[id^p.json results] failures]
[results [id^json failures]]
--
::
::
++ get-latest-block
|= url=@ta
=/ m (strand:strandio ,block)
^- form:m
;< =json bind:m
(request-rpc url `'block number' %eth-block-number ~)
(get-block-by-number url (parse-eth-block-number:rpc:ethereum json))
::
++ get-block-by-number
|= [url=@ta =number:block]
=/ m (strand:strandio ,block)
^- form:m
|^
%+ (retry:strandio ,block) `10
=/ m (strand:strandio ,(unit block))
^- form:m
;< =json bind:m
%+ request-rpc url
:- `'block by number'
[%eth-get-block-by-number number |]
(pure:m (parse-block json))
::
++ parse-block
|= =json
^- (unit block)
=< ?~(. ~ `[[&1 &2] |2]:u)
^- (unit [@ @ @])
~| json
%. json
=, dejs-soft:format
%- ot
:~ hash+parse-hex
number+parse-hex
'parentHash'^parse-hex
==
::
++ parse-hex |=(=json `(unit @)`(some (parse-hex-result:rpc:ethereum json)))
--
::
++ get-tx-by-hash
|= [url=@ta tx-hash=@ux]
=/ m (strand:strandio transaction-result:rpc:ethereum)
^- form:m
;< =json bind:m
%+ request-rpc url
:* `'tx by hash'
%eth-get-transaction-by-hash
tx-hash
==
%- pure:m
(parse-transaction-result:rpc:ethereum json)
::
++ get-logs-by-hash
|= [url=@ta =hash:block contracts=(list address) =topics]
=/ m (strand:strandio (list event-log:rpc:ethereum))
^- form:m
;< =json bind:m
%+ request-rpc url
:* `'logs by hash'
%eth-get-logs-by-hash
hash
contracts
topics
==
%- pure:m
(parse-event-logs:rpc:ethereum json)
::
++ get-logs-by-range
|= $: url=@ta
contracts=(list address)
=topics
=from=number:block
=to=number:block
==
=/ m (strand:strandio (list event-log:rpc:ethereum))
^- form:m
;< =json bind:m
%+ request-rpc url
:* `'logs by range'
%eth-get-logs
`number+from-number
`number+to-number
contracts
topics
==
%- pure:m
(parse-event-logs:rpc:ethereum json)
::
++ get-next-nonce
|= [url=@ta =address]
=/ m (strand:strandio ,@ud)
^- form:m
;< =json bind:m
%^ request-rpc url `'nonce'
[%eth-get-transaction-count address [%label %latest]]
%- pure:m
(parse-eth-get-transaction-count:rpc:ethereum json)
::
++ get-balance
|= [url=@ta =address]
=/ m (strand:strandio ,@ud)
^- form:m
;< =json bind:m
%^ request-rpc url `'balance'
[%eth-get-balance address [%label %latest]]
%- pure:m
(parse-eth-get-balance:rpc:ethereum json)
--