[clock] Replace Market.waitUntil() with Clock.waitUntil()

dagger/clock.nim

@@ -1,6 +1,12 @@
+import pkg/chronos
+
 type
   Clock* = ref object of RootObj
   SecondsSince1970* = int64
 
 method now*(clock: Clock): SecondsSince1970 {.base.} =
   raiseAssert "not implemented"
+
+proc waitUntil*(clock: Clock, time: SecondsSince1970) {.async.} =
+  while clock.now() < time:
+    await sleepAsync(1.seconds)

dagger/contracts/market.nim

@@ -10,21 +10,17 @@ type
   OnChainMarket* = ref object of Market
     contract: Storage
     signer: Signer
-    pollInterval*: Duration
   MarketSubscription = market.Subscription
   EventSubscription = ethers.Subscription
   OnChainMarketSubscription = ref object of MarketSubscription
     eventSubscription: EventSubscription
 
-const DefaultPollInterval = 3.seconds
-
 func new*(_: type OnChainMarket, contract: Storage): OnChainMarket =
   without signer =? contract.signer:
     raiseAssert("Storage contract should have a signer")
   OnChainMarket(
     contract: contract,
     signer: signer,
-    pollInterval: DefaultPollInterval
   )
 
 method requestStorage(market: OnChainMarket,
@@ -46,15 +42,6 @@ method offerStorage(market: OnChainMarket,
 method selectOffer(market: OnChainMarket, offerId: array[32, byte]) {.async.} =
   await market.contract.selectOffer(offerId)
 
-method getTime(market: OnChainMarket): Future[UInt256] {.async.} =
-  let provider = market.contract.provider
-  let blck = !await provider.getBlock(BlockTag.latest)
-  return blck.timestamp
-
-method waitUntil*(market: OnChainMarket, expiry: UInt256) {.async.} =
-  while not ((time =? await market.getTime()) and (time >= expiry)):
-    await sleepAsync(market.pollInterval)
-
 method subscribeRequests(market: OnChainMarket,
                          callback: OnRequest):
                         Future[MarketSubscription] {.async.} =

dagger/market.nim

@@ -27,12 +27,6 @@ method offerStorage*(market: Market,
 method selectOffer*(market: Market, id: array[32, byte]) {.base, async.} =
   raiseAssert("not implemented")
 
-method getTime*(market: Market): Future[UInt256] {.base, async.} =
-  raiseAssert("not implemented")
-
-method waitUntil*(market: Market, expiry: UInt256) {.base, async.} =
-  raiseAssert("not implemented")
-
 method subscribeRequests*(market: Market,
                           callback: OnRequest):
                          Future[Subscription] {.base, async.} =

dagger/purchasing.nim

@@ -88,7 +88,7 @@ proc run(purchase: Purchase) {.async.} =
   let market = purchase.market
   purchase.request = await market.requestStorage(purchase.request)
   let subscription = await market.subscribeOffers(purchase.request.id, onOffer)
-  await market.waitUntil(purchase.request.expiry)
+  await purchase.clock.waitUntil(purchase.request.expiry.truncate(int64))
   await purchase.selectOffer()
   await subscription.unsubscribe()
 

dagger/sales.nim

@@ -114,7 +114,7 @@ proc subscribeSelect(negotiation: Negotiation) {.async.} =
 proc waitForExpiry(negotiation: Negotiation) {.async.} =
   without offer =? negotiation.offer:
     return
-  await negotiation.sales.market.waitUntil(offer.expiry)
+  await negotiation.sales.clock.waitUntil(offer.expiry.truncate(int64))
   negotiation.finish(success = false)
 
 proc start(negotiation: Negotiation) {.async.} =

tests/contracts/testMarket.nim

@@ -154,23 +154,3 @@ ethersuite "On-Chain Market":
     check selected == @[offer.id]
 
     await subscription.unsubscribe()
-
-  test "can retrieve current block time":
-    let latestBlock = !await provider.getBlock(BlockTag.latest)
-    check (await market.getTime()) == latestBlock.timestamp
-
-  test "supports waiting for expiry of a request or offer":
-    let pollInterval = 200.milliseconds
-    market.pollInterval = pollInterval
-
-    proc waitForPoll {.async.} =
-      await sleepAsync(pollInterval * 2)
-
-    let future = market.waitUntil(request.expiry)
-    check not future.completed
-    await provider.advanceTimeTo(request.expiry - 1)
-    await waitForPoll()
-    check not future.completed
-    await provider.advanceTimeTo(request.expiry)
-    await waitForPoll()
-    check future.completed

tests/dagger/helpers/mockmarket.nim

@@ -106,23 +106,3 @@ method unsubscribe*(subscription: OfferSubscription) {.async.} =
 
 method unsubscribe*(subscription: SelectSubscription) {.async.} =
   subscription.market.subscriptions.onSelect.keepItIf(it != subscription)
-
-func `<`(a, b: Expiry): bool =
-  a.expiry < b.expiry
-
-method getTime*(market: MockMarket): Future[UInt256] {.async.} =
-  return market.time
-
-method waitUntil*(market: MockMarket, expiry: UInt256): Future[void] =
-  let future = Future[void]()
-  if expiry > market.time:
-    market.waiting.push(Expiry(future: future, expiry: expiry))
-  else:
-    future.complete()
-  future
-
-proc advanceTimeTo*(market: MockMarket, time: UInt256) =
-  doAssert(time >= market.time)
-  market.time = time
-  while market.waiting.len > 0 and market.waiting[0].expiry <= time:
-    market.waiting.pop().future.complete()

tests/dagger/testpurchasing.nim

@@ -27,7 +27,7 @@ suite "Purchasing":
 
   proc purchaseAndWait(request: StorageRequest) {.async.} =
     let purchase = purchasing.purchase(request)
-    market.advanceTimeTo(market.requested[^1].expiry)
+    clock.set(market.requested[^1].expiry.truncate(int64))
     await purchase.wait()
 
   test "submits a storage request when asked":
@@ -90,7 +90,7 @@ suite "Purchasing":
     offer2.price = 10.u256
     discard await market.offerStorage(offer1)
     discard await market.offerStorage(offer2)
-    market.advanceTimeTo(request.expiry)
+    clock.set(request.expiry.truncate(int64))
     await purchase.wait()
     check market.selected[0] == offer2.id
 
@@ -104,7 +104,7 @@ suite "Purchasing":
     offer2.expiry = expired
     discard await market.offerStorage(offer1)
     discard await market.offerStorage(offer2)
-    market.advanceTimeTo(request.expiry)
+    clock.set(request.expiry.truncate(int64))
     await purchase.wait()
     check market.selected[0] == offer1.id
 
@@ -121,6 +121,6 @@ suite "Purchasing":
     offer2.expiry = getTime().toUnix().u256 + expiryMargin - 1
     discard await market.offerStorage(offer1)
     discard await market.offerStorage(offer2)
-    market.advanceTimeTo(request.expiry)
+    clock.set(request.expiry.truncate(int64))
     await purchase.wait()
     check market.selected[0] == offer1.id

tests/dagger/testsales.nim

@@ -74,7 +74,7 @@ suite "Sales":
 
   test "sets expiry time of offer":
     sales.add(availability)
-    let now = getTime().toUnix().u256
+    let now = clock.now().u256
     discard await market.requestStorage(request)
     check market.offered[0].expiry == now + sales.offerExpiryInterval
 
@@ -111,6 +111,6 @@ suite "Sales":
     sales.add(availability)
     discard await market.requestStorage(request)
     let offer = market.offered[0]
-    market.advanceTimeTo(offer.expiry)
-    await sleepAsync(chronos.seconds(1))
+    clock.set(offer.expiry.truncate(int64))
+    await sleepAsync(chronos.seconds(2))
     check sales.available.contains(availability)