[purchasing] add expiry to storage request via REST API

dagger/node.nim

@@ -212,7 +212,8 @@ proc requestStorage*(self: DaggerNodeRef,
                      duration: UInt256,
                      nodes: uint,
                      tolerance: uint,
-                     maxPrice: UInt256): Future[?!array[32, byte]] {.async.} =
+                     maxPrice: UInt256,
+                     expiry = UInt256.none): Future[?!array[32, byte]] {.async.} =
   ## Initiate a request for storage sequence, this might
   ## be a multistep procedure.
   ##
@@ -280,7 +281,8 @@ proc requestStorage*(self: DaggerNodeRef,
         publicKey: @[], # TODO: PoR setup
         name: @[]       # TODO: PoR setup
       )
-    )
+    ),
+    expiry: expiry |? 0.u256
   )
 
   let purchase = contracts.purchasing.purchase(request)

dagger/rest/api.nim

@@ -208,7 +208,8 @@ proc initRestApi*(node: DaggerNodeRef, conf: DaggerConf): RestRouter =
                                                       params.duration,
                                                       nodes,
                                                       tolerance,
-                                                      params.maxPrice), error:
+                                                      params.maxPrice,
+                                                      params.expiry), error:
         return RestApiResponse.error(Http500, error.msg)
 
       return RestApiResponse.response(purchaseId.toHex)

dagger/rest/json.nim

@@ -9,6 +9,7 @@ type
   StorageRequestParams* = object
     duration*: UInt256
     maxPrice*: UInt256
+    expiry*: ?UInt256
 
 proc fromJson*(_: type Availability, bytes: seq[byte]): ?!Availability =
   let json = ?catch parseJson(string.fromBytes(bytes))
@@ -22,7 +23,12 @@ proc fromJson*(_: type StorageRequestParams,
   let json = ?catch parseJson(string.fromBytes(bytes))
   let duration = ?catch UInt256.fromHex(json["duration"].getStr)
   let maxPrice = ?catch UInt256.fromHex(json["maxPrice"].getStr)
-  success StorageRequestParams(duration: duration, maxPrice: maxPrice)
+  let expiry = UInt256.fromHex(json["expiry"].getStr).catch.option
+  success StorageRequestParams(
+    duration: duration,
+    maxPrice: maxPrice,
+    expiry: expiry
+  )
 
 func `%`*(address: Address): JsonNode =
   % $address