[market] submit storage offers

dagger/contracts/market.nim

@@ -20,6 +20,16 @@ func new*(_: type OnChainMarket, contract: Storage): OnChainMarket =
     raiseAssert("Storage contract should have a signer")
   OnChainMarket(contract: contract, signer: signer)
 
+method requestStorage(market: OnChainMarket, request: StorageRequest) {.async.} =
+  var request = request
+  request.client = await market.signer.getAddress()
+  await market.contract.requestStorage(request)
+
+method offerStorage(market: OnChainMarket, offer: StorageOffer) {.async.} =
+  var offer = offer
+  offer.host = await market.signer.getAddress()
+  await market.contract.offerStorage(offer)
+
 method subscribeRequests(market: OnChainMarket,
                          callback: OnRequest):
                         Future[MarketSubscription] {.async.} =
@@ -28,10 +38,14 @@ method subscribeRequests(market: OnChainMarket,
   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 subscribeOffers(market: OnChainMarket,
+                       requestId: array[32, byte],
+                       callback: OnOffer):
+                      Future[MarketSubscription] {.async.} =
+  proc onEvent(event: StorageOffered) {.upraises:[].} =
+    callback(event.offer)
+  let subscription = await market.contract.subscribe(StorageOffered, onEvent)
+  return OnChainMarketSubscription(eventSubscription: subscription)
 
 method unsubscribe*(subscription: OnChainMarketSubscription) {.async.} =
   await subscription.eventSubscription.unsubscribe()

dagger/contracts/offers.nim

@@ -1,5 +1,7 @@
 import pkg/contractabi
 import pkg/nimcrypto
+import pkg/ethers/fields
+import pkg/questionable/results
 
 export contractabi
 
@@ -10,19 +12,23 @@ type
     price*: UInt256
     expiry*: UInt256
 
-func toTuple(offer: StorageOffer): auto =
-  (
-    offer.host,
-    offer.requestId,
-    offer.price,
-    offer.expiry
+func fromTuple(_: type StorageOffer, tupl: tuple): StorageOffer =
+  StorageOffer(
+    host: tupl[0],
+    requestId: tupl[1],
+    price: tupl[2],
+    expiry: tupl[3]
   )
 
 func solidityType*(_: type StorageOffer): string =
-  solidityType(typeof StorageOffer.default.toTuple)
+  solidityType(StorageOffer.fieldTypes)
 
 func encode*(encoder: var AbiEncoder, offer: StorageOffer) =
-  encoder.write(offer.toTuple)
+  encoder.write(offer.fieldValues)
+
+func decode*(decoder: var AbiDecoder, T: type StorageOffer): ?!T =
+  let tupl = ?decoder.read(StorageOffer.fieldTypes)
+  success StorageOffer.fromTuple(tupl)
 
 func id*(offer: StorageOffer): array[32, byte] =
   let encoding = AbiEncoder.encode(offer)

dagger/contracts/storage.nim

@@ -6,7 +6,7 @@ import ./requests
 import ./offers
 
 export stint
-export contract
+export ethers
 
 type
   Storage* = ref object of Contract
@@ -14,6 +14,10 @@ type
   StorageRequested* = object of Event
     requestId*: Id
     request*: StorageRequest
+  StorageOffered* = object of Event
+    offerId*: Id
+    offer*: StorageOffer
+    requestId* {.indexed.}: Id
 
 proc collateralAmount*(storage: Storage): UInt256 {.contract, view.}
 proc slashMisses*(storage: Storage): UInt256 {.contract, view.}

tests/contracts/testMarket.nim

@@ -1,3 +1,4 @@
+import std/times
 import ./ethertest
 import dagger/contracts
 import dagger/contracts/testtoken
@@ -8,14 +9,28 @@ ethersuite "On-Chain Market":
   var market: OnChainMarket
   var storage: Storage
   var token: TestToken
+  var request: StorageRequest
+  var offer: StorageOffer
 
   setup:
     let deployment = deployment()
     storage = Storage.new(!deployment.address(Storage), provider.getSigner())
     token = TestToken.new(!deployment.address(TestToken), provider.getSigner())
     await token.mint(accounts[0], 1000.u256)
+
+    let collateral = await storage.collateralAmount()
+    await token.approve(storage.address, collateral)
+    await storage.deposit(collateral)
+
     market = OnChainMarket.new(storage)
 
+    request = StorageRequest.example
+    offer = StorageOffer.example
+    request.client = accounts[0]
+    offer.host = accounts[0]
+    offer.requestId = request.id
+    offer.price = request.maxPrice
+
   test "fails to instantiate when contract does not have a signer":
     let storageWithoutSigner = storage.connect(provider)
     expect AssertionError:
@@ -26,14 +41,55 @@ ethersuite "On-Chain Market":
     proc onRequest(request: StorageRequest) =
       submitted.add(request)
     let subscription = await market.subscribeRequests(onRequest)
-    let request = StorageRequest(
-      duration: uint16.example.u256,
-      size: uint32.example.u256,
-      contentHash: array[32, byte].example
-    )
+    await token.approve(storage.address, request.maxPrice)
+
     await market.requestStorage(request)
-    check submitted.len == 1
-    check submitted[0].duration == request.duration
-    check submitted[0].size == request.size
-    check submitted[0].contentHash == request.contentHash
+
+    check submitted == @[request]
+
     await subscription.unsubscribe()
+
+  test "sets client address when submitting storage request":
+    var requestWithoutClient = request
+    requestWithoutClient.client = Address.default
+
+    var submitted: StorageRequest
+    proc onRequest(request: StorageRequest) =
+      submitted = request
+    let subscription = await market.subscribeRequests(onRequest)
+    await token.approve(storage.address, request.maxPrice)
+
+    await market.requestStorage(requestWithoutClient)
+
+    check submitted.client == accounts[0]
+
+  test "supports storage offers":
+    await token.approve(storage.address, request.maxPrice)
+    await market.requestStorage(request)
+
+    var submitted: seq[StorageOffer]
+    proc onOffer(offer: StorageOffer) =
+      submitted.add(offer)
+    let subscription = await market.subscribeOffers(request.id, onOffer)
+
+    await market.offerStorage(offer)
+
+    check submitted == @[offer]
+
+    await subscription.unsubscribe()
+
+  test "sets host address when submitting storage offer":
+    var offerWithoutHost = offer
+    offerWithoutHost.host = Address.default
+
+    await token.approve(storage.address, request.maxPrice)
+    await market.requestStorage(request)
+
+    var submitted: StorageOffer
+    proc onOffer(offer: StorageOffer) =
+      submitted = offer
+    let subscription = await market.subscribeOffers(request.id, onOffer)
+
+    await market.offerStorage(offerWithoutHost)
+
+    check submitted.host == accounts[0]