[purchasing] rename requests -> requested

tests/dagger/helpers/mockmarket.nim

@@ -2,7 +2,7 @@ import pkg/dagger/market
 
 type
   MockMarket* = ref object of Market
-    requests*: seq[StorageRequest]
+    requested*: seq[StorageRequest]
 
 method requestStorage*(market: MockMarket, request: StorageRequest) {.async.} =
-  market.requests.add(request)
+  market.requested.add(request)

tests/dagger/testpurchasing.nim

@@ -23,7 +23,7 @@ suite "Purchasing":
 
   test "submits a storage request when asked":
     await purchasing.purchase(request).wait()
-    let submitted = market.requests[0]
+    let submitted = market.requested[0]
     check submitted.duration == request.duration
     check submitted.size == request.size
     check submitted.contentHash == request.contentHash
@@ -35,12 +35,12 @@ suite "Purchasing":
   test "can change default value for proof probability":
     purchasing.proofProbability = 42.u256
     await purchasing.purchase(request).wait()
-    check market.requests[0].proofProbability == 42.u256
+    check market.requested[0].proofProbability == 42.u256
 
   test "can override proof probability per request":
     request.proofProbability = 42.u256
     await purchasing.purchase(request).wait()
-    check market.requests[0].proofProbability == 42.u256
+    check market.requested[0].proofProbability == 42.u256
 
   test "has a default value for request expiration interval":
     check purchasing.requestExpiryInterval != 0.u256
@@ -49,15 +49,15 @@ suite "Purchasing":
     purchasing.requestExpiryInterval = 42.u256
     let start = getTime().toUnix()
     await purchasing.purchase(request).wait()
-    check market.requests[0].expiry == (start + 42).u256
+    check market.requested[0].expiry == (start + 42).u256
 
   test "can override expiry time per request":
     let expiry = (getTime().toUnix() + 42).u256
     request.expiry = expiry
     await purchasing.purchase(request).wait()
-    check market.requests[0].expiry == expiry
+    check market.requested[0].expiry == expiry
 
   test "includes a random nonce in every storage request":
     await purchasing.purchase(request).wait()
     await purchasing.purchase(request).wait()
-    check market.requests[0].nonce != market.requests[1].nonce
+    check market.requested[0].nonce != market.requested[1].nonce