nimbus-eth2/beacon_chain/rpc/rest_light_client_api.nim

95 lines
3.7 KiB
Nim

# beacon_chain
# Copyright (c) 2021-2022 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [Defect].}
import chronicles
import ../beacon_node,
./rest_utils
logScope: topics = "rest_light_client"
proc installLightClientApiHandlers*(router: var RestRouter, node: BeaconNode) =
# https://github.com/ethereum/beacon-APIs/pull/181
router.api(MethodGet,
"/eth/v0/beacon/light_client/bootstrap/{block_root}") do (
block_root: Eth2Digest) -> RestApiResponse:
doAssert node.dag.lcDataStore.serve
let vroot = block:
if block_root.isErr():
return RestApiResponse.jsonError(Http400, InvalidBlockRootValueError,
$block_root.error())
block_root.get()
let bootstrap = node.dag.getLightClientBootstrap(vroot)
if bootstrap.isOk:
return RestApiResponse.jsonResponse(bootstrap)
else:
return RestApiResponse.jsonError(Http404, LCBootstrapUnavailable)
# https://github.com/ethereum/beacon-APIs/pull/181
router.api(MethodGet,
"/eth/v0/beacon/light_client/updates") do (
start_period: Option[SyncCommitteePeriod], count: Option[uint64]
) -> RestApiResponse:
doAssert node.dag.lcDataStore.serve
let vstart = block:
if start_period.isNone():
return RestApiResponse.jsonError(Http400, MissingStartPeriodValueError)
let rstart = start_period.get()
if rstart.isErr():
return RestApiResponse.jsonError(Http400, InvalidSyncPeriodError,
$rstart.error())
rstart.get()
let vcount = block:
if count.isNone():
return RestApiResponse.jsonError(Http400, MissingCountValueError)
let rcount = count.get()
if rcount.isErr():
return RestApiResponse.jsonError(Http400, InvalidCountError,
$rcount.error())
rcount.get()
let
headPeriod = node.dag.head.slot.sync_committee_period
# Limit number of updates in response
maxSupportedCount =
if vstart > headPeriod:
0'u64
else:
min(headPeriod + 1 - vstart, MAX_REQUEST_LIGHT_CLIENT_UPDATES)
numPeriods = min(vcount, maxSupportedCount)
onePastPeriod = vstart + numPeriods
var updates = newSeqOfCap[LightClientUpdate](numPeriods)
for period in vstart..<onePastPeriod:
let update = node.dag.getLightClientUpdateForPeriod(period)
if update.isSome:
updates.add update.get
return RestApiResponse.jsonResponse(updates)
# https://github.com/ethereum/beacon-APIs/pull/181
router.api(MethodGet,
"/eth/v0/beacon/light_client/finality_update") do (
) -> RestApiResponse:
doAssert node.dag.lcDataStore.serve
let finality_update = node.dag.getLightClientFinalityUpdate()
if finality_update.isSome:
return RestApiResponse.jsonResponse(finality_update)
else:
return RestApiResponse.jsonError(Http404, LCFinUpdateUnavailable)
# https://github.com/ethereum/beacon-APIs/pull/181
router.api(MethodGet,
"/eth/v0/beacon/light_client/optimistic_update") do (
) -> RestApiResponse:
doAssert node.dag.lcDataStore.serve
let optimistic_update = node.dag.getLightClientOptimisticUpdate()
if optimistic_update.isSome:
return RestApiResponse.jsonResponse(optimistic_update)
else:
return RestApiResponse.jsonError(Http404, LCOptUpdateUnavailable)