59 lines
2.1 KiB
Nim
59 lines
2.1 KiB
Nim
import pkg/ethers
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import pkg/upraises
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import pkg/questionable
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import ../market
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import ./storage
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export market
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type
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OnChainMarket* = ref object of Market
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contract: Storage
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signer: Signer
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MarketSubscription = market.Subscription
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EventSubscription = ethers.Subscription
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OnChainMarketSubscription = ref object of MarketSubscription
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eventSubscription: EventSubscription
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func new*(_: type OnChainMarket, contract: Storage): OnChainMarket =
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without signer =? contract.signer:
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raiseAssert("Storage contract should have a signer")
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OnChainMarket(
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contract: contract,
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signer: signer,
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)
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method requestStorage(market: OnChainMarket,
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request: StorageRequest):
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Future[StorageRequest] {.async.} =
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var request = request
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request.client = await market.signer.getAddress()
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await market.contract.requestStorage(request)
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return request
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method fulfillRequest(market: OnChainMarket,
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requestId: array[32, byte],
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proof: seq[byte]) {.async.} =
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await market.contract.fulfillRequest(requestId, proof)
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method subscribeRequests(market: OnChainMarket,
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callback: OnRequest):
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Future[MarketSubscription] {.async.} =
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proc onEvent(event: StorageRequested) {.upraises:[].} =
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callback(event.requestId, event.ask)
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let subscription = await market.contract.subscribe(StorageRequested, onEvent)
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return OnChainMarketSubscription(eventSubscription: subscription)
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method subscribeFulfillment(market: OnChainMarket,
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requestId: array[32, byte],
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callback: OnFulfillment):
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Future[MarketSubscription] {.async.} =
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proc onEvent(event: RequestFulfilled) {.upraises:[].} =
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if event.requestId == requestId:
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callback(event.requestId)
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let subscription = await market.contract.subscribe(RequestFulfilled, onEvent)
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return OnChainMarketSubscription(eventSubscription: subscription)
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method unsubscribe*(subscription: OnChainMarketSubscription) {.async.} =
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await subscription.eventSubscription.unsubscribe()
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