nim-codex/codex/contracts/market.nim

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import pkg/ethers
import pkg/upraises
import pkg/questionable
import ../market
import ./storage
export market
type
OnChainMarket* = ref object of Market
contract: Storage
signer: Signer
MarketSubscription = market.Subscription
EventSubscription = ethers.Subscription
OnChainMarketSubscription = ref object of MarketSubscription
eventSubscription: EventSubscription
func new*(_: type OnChainMarket, contract: Storage): OnChainMarket =
without signer =? contract.signer:
raiseAssert("Storage contract should have a signer")
OnChainMarket(
contract: contract,
signer: signer,
)
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method getSigner*(market: OnChainMarket): Future[Address] {.async.} =
return await market.signer.getAddress()
method requestStorage(market: OnChainMarket,
request: StorageRequest):
Future[StorageRequest] {.async.} =
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var request = request
request.client = await market.signer.getAddress()
await market.contract.requestStorage(request)
return request
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method getRequest(market: OnChainMarket,
id: RequestId): Future[?StorageRequest] {.async.} =
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let request = await market.contract.getRequest(id)
if request != StorageRequest.default:
return some request
else:
return none StorageRequest
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method getHost(market: OnChainMarket,
requestId: RequestId,
slotIndex: UInt256): Future[?Address] {.async.} =
let slotId = slotId(requestId, slotIndex)
let address = await market.contract.getHost(slotId)
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if address != Address.default:
return some address
else:
return none Address
method fillSlot(market: OnChainMarket,
requestId: RequestId,
slotIndex: UInt256,
proof: seq[byte]) {.async.} =
await market.contract.fillSlot(requestId, slotIndex, proof)
method withdrawFunds(market: OnChainMarket,
requestId: array[32, byte]) {.async.} =
await market.contract.withdrawFunds(requestId)
method subscribeRequests(market: OnChainMarket,
callback: OnRequest):
Future[MarketSubscription] {.async.} =
proc onEvent(event: StorageRequested) {.upraises:[].} =
callback(event.requestId, event.ask)
let subscription = await market.contract.subscribe(StorageRequested, onEvent)
return OnChainMarketSubscription(eventSubscription: subscription)
method subscribeSlotFilled*(market: OnChainMarket,
requestId: RequestId,
slotIndex: UInt256,
callback: OnSlotFilled):
Future[MarketSubscription] {.async.} =
proc onEvent(event: SlotFilled) {.upraises:[].} =
if event.requestId == requestId and event.slotIndex == slotIndex:
callback(event.requestId, event.slotIndex)
let subscription = await market.contract.subscribe(SlotFilled, onEvent)
return OnChainMarketSubscription(eventSubscription: subscription)
method subscribeFulfillment(market: OnChainMarket,
requestId: RequestId,
callback: OnFulfillment):
Future[MarketSubscription] {.async.} =
proc onEvent(event: RequestFulfilled) {.upraises:[].} =
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if event.requestId == requestId:
callback(event.requestId)
let subscription = await market.contract.subscribe(RequestFulfilled, onEvent)
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return OnChainMarketSubscription(eventSubscription: subscription)
method subscribeRequestCancelled*(market: OnChainMarket,
requestId: array[32, byte],
callback: OnRequestCancelled):
Future[MarketSubscription] {.async.} =
proc onEvent(event: RequestCancelled) {.upraises:[].} =
if event.requestId == requestId:
callback(event.requestId)
let subscription = await market.contract.subscribe(RequestCancelled, onEvent)
return OnChainMarketSubscription(eventSubscription: subscription)
method unsubscribe*(subscription: OnChainMarketSubscription) {.async.} =
await subscription.eventSubscription.unsubscribe()