nim-codex/dagger/contracts/market.nim

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import pkg/ethers
import pkg/upraises
import ../market
import ./storage
type
OnChainMarket* = ref object of Market
contract: Storage
signer: Signer
MarketSubscription = market.Subscription
EventSubscription = ethers.Subscription
OnChainMarketSubscription = ref object of MarketSubscription
eventSubscription: EventSubscription
export market
func new*(_: type OnChainMarket, contract: Storage): OnChainMarket =
OnChainMarket(contract: contract, signer: !contract.signer)
method subscribeRequests(market: OnChainMarket,
callback: OnRequest):
Future[MarketSubscription] {.async.} =
proc onEvent(event: StorageRequested) {.upraises:[].} =
callback(event.request)
let subscription = await market.contract.subscribe(StorageRequested, onEvent)
return OnChainMarketSubscription(eventSubscription: subscription)
method requestStorage(market: OnChainMarket, request: StorageRequest) {.async.} =
var request = request
request.client = await market.signer.getAddress()
await market.contract.requestStorage(request)
method unsubscribe*(subscription: OnChainMarketSubscription) {.async.} =
await subscription.eventSubscription.unsubscribe()