diff --git a/codex.nim b/codex.nim
index e2c6033e..7749bdee 100644
--- a/codex.nim
+++ b/codex.nim
@@ -38,33 +38,35 @@ when isMainModule:
   when defined(posix):
     import system/ansi_c
 
-  type
-    CodexStatus {.pure.} = enum
-      Stopped,
-      Stopping,
-      Running
+  type CodexStatus {.pure.} = enum
+    Stopped
+    Stopping
+    Running
 
   let config = CodexConf.load(
     version = codexFullVersion,
     envVarsPrefix = "codex",
-    secondarySources = proc (config: CodexConf, sources: auto) {.gcsafe, raises: [ConfigurationError].} =
-            if configFile =? config.configFile:
-              sources.addConfigFile(Toml, configFile)
+    secondarySources = proc(
+        config: CodexConf, sources: auto
+    ) {.gcsafe, raises: [ConfigurationError].} =
+      if configFile =? config.configFile:
+        sources.addConfigFile(Toml, configFile)
+    ,
   )
   config.setupLogging()
   config.setupMetrics()
 
-  if not(checkAndCreateDataDir((config.dataDir).string)):
+  if not (checkAndCreateDataDir((config.dataDir).string)):
     # We are unable to access/create data folder or data folder's
     # permissions are insecure.
     quit QuitFailure
 
-  if config.prover() and not(checkAndCreateDataDir((config.circuitDir).string)):
+  if config.prover() and not (checkAndCreateDataDir((config.circuitDir).string)):
     quit QuitFailure
 
   trace "Data dir initialized", dir = $config.dataDir
 
-  if not(checkAndCreateDataDir((config.dataDir / "repo"))):
+  if not (checkAndCreateDataDir((config.dataDir / "repo"))):
     # We are unable to access/create data folder or data folder's
     # permissions are insecure.
     quit QuitFailure
@@ -83,11 +85,12 @@ when isMainModule:
         config.dataDir / config.netPrivKeyFile
 
     privateKey = setupKey(keyPath).expect("Should setup private key!")
-    server = try:
-      CodexServer.new(config, privateKey)
-    except Exception as exc:
-      error "Failed to start Codex", msg = exc.msg
-      quit QuitFailure
+    server =
+      try:
+        CodexServer.new(config, privateKey)
+      except Exception as exc:
+        error "Failed to start Codex", msg = exc.msg
+        quit QuitFailure
 
   ## Ctrl+C handling
   proc doShutdown() =
@@ -101,7 +104,9 @@ when isMainModule:
       # workaround for https://github.com/nim-lang/Nim/issues/4057
       try:
         setupForeignThreadGc()
-      except Exception as exc: raiseAssert exc.msg # shouldn't happen
+      except Exception as exc:
+        raiseAssert exc.msg
+        # shouldn't happen
     notice "Shutting down after having received SIGINT"
 
     doShutdown()
diff --git a/codex/contracts/config.nim b/codex/contracts/config.nim
index 5493c643..986b1944 100644
--- a/codex/contracts/config.nim
+++ b/codex/contracts/config.nim
@@ -10,13 +10,16 @@ type
   MarketplaceConfig* = object
     collateral*: CollateralConfig
     proofs*: ProofConfig
+    reservations*: SlotReservationsConfig
+    requestDurationLimit*: UInt256
 
   CollateralConfig* = object
     repairRewardPercentage*: uint8
       # percentage of remaining collateral slot has after it has been freed
     maxNumberOfSlashes*: uint8 # frees slot when the number of slashes reaches this value
-    slashCriterion*: uint16 # amount of proofs missed that lead to slashing
     slashPercentage*: uint8 # percentage of the collateral that is slashed
+    validatorRewardPercentage*: uint8
+      # percentage of the slashed amount going to the validators
 
   ProofConfig* = object
     period*: UInt256 # proofs requirements are calculated per period (in seconds)
@@ -28,6 +31,9 @@ type
     # blocks. Should be a prime number to ensure there are no cycles.
     downtimeProduct*: uint8
 
+  SlotReservationsConfig* = object
+    maxReservations*: uint8
+
 func fromTuple(_: type ProofConfig, tupl: tuple): ProofConfig =
   ProofConfig(
     period: tupl[0],
@@ -37,16 +43,27 @@ func fromTuple(_: type ProofConfig, tupl: tuple): ProofConfig =
     downtimeProduct: tupl[4],
   )
 
+func fromTuple(_: type SlotReservationsConfig, tupl: tuple): SlotReservationsConfig =
+  SlotReservationsConfig(maxReservations: tupl[0])
+
 func fromTuple(_: type CollateralConfig, tupl: tuple): CollateralConfig =
   CollateralConfig(
     repairRewardPercentage: tupl[0],
     maxNumberOfSlashes: tupl[1],
-    slashCriterion: tupl[2],
-    slashPercentage: tupl[3],
+    slashPercentage: tupl[2],
+    validatorRewardPercentage: tupl[3],
   )
 
 func fromTuple(_: type MarketplaceConfig, tupl: tuple): MarketplaceConfig =
-  MarketplaceConfig(collateral: tupl[0], proofs: tupl[1])
+  MarketplaceConfig(
+    collateral: tupl[0],
+    proofs: tupl[1],
+    reservations: tupl[2],
+    requestDurationLimit: tupl[3],
+  )
+
+func solidityType*(_: type SlotReservationsConfig): string =
+  solidityType(SlotReservationsConfig.fieldTypes)
 
 func solidityType*(_: type ProofConfig): string =
   solidityType(ProofConfig.fieldTypes)
@@ -55,7 +72,10 @@ func solidityType*(_: type CollateralConfig): string =
   solidityType(CollateralConfig.fieldTypes)
 
 func solidityType*(_: type MarketplaceConfig): string =
-  solidityType(CollateralConfig.fieldTypes)
+  solidityType(MarketplaceConfig.fieldTypes)
+
+func encode*(encoder: var AbiEncoder, slot: SlotReservationsConfig) =
+  encoder.write(slot.fieldValues)
 
 func encode*(encoder: var AbiEncoder, slot: ProofConfig) =
   encoder.write(slot.fieldValues)
@@ -70,6 +90,10 @@ func decode*(decoder: var AbiDecoder, T: type ProofConfig): ?!T =
   let tupl = ?decoder.read(ProofConfig.fieldTypes)
   success ProofConfig.fromTuple(tupl)
 
+func decode*(decoder: var AbiDecoder, T: type SlotReservationsConfig): ?!T =
+  let tupl = ?decoder.read(SlotReservationsConfig.fieldTypes)
+  success SlotReservationsConfig.fromTuple(tupl)
+
 func decode*(decoder: var AbiDecoder, T: type CollateralConfig): ?!T =
   let tupl = ?decoder.read(CollateralConfig.fieldTypes)
   success CollateralConfig.fromTuple(tupl)
diff --git a/codex/contracts/market.nim b/codex/contracts/market.nim
index 9157b269..208dbe07 100644
--- a/codex/contracts/market.nim
+++ b/codex/contracts/market.nim
@@ -91,9 +91,14 @@ method proofTimeout*(market: OnChainMarket): Future[UInt256] {.async.} =
 
 method repairRewardPercentage*(market: OnChainMarket): Future[uint8] {.async.} =
   convertEthersError:
-    let config = await market.contract.configuration()
+    let config = await market.config()
     return config.collateral.repairRewardPercentage
 
+method requestDurationLimit*(market: OnChainMarket): Future[UInt256] {.async.} =
+  convertEthersError:
+    let config = await market.config()
+    return config.requestDurationLimit
+
 method proofDowntime*(market: OnChainMarket): Future[uint8] {.async.} =
   convertEthersError:
     let config = await market.config()
diff --git a/codex/contracts/marketplace.nim b/codex/contracts/marketplace.nim
index 87fd1e47..091f45db 100644
--- a/codex/contracts/marketplace.nim
+++ b/codex/contracts/marketplace.nim
@@ -42,6 +42,7 @@ type
   Marketplace_InsufficientCollateral* = object of SolidityError
   Marketplace_InsufficientReward* = object of SolidityError
   Marketplace_InvalidCid* = object of SolidityError
+  Marketplace_DurationExceedsLimit* = object of SolidityError
   Proofs_InsufficientBlockHeight* = object of SolidityError
   Proofs_InvalidProof* = object of SolidityError
   Proofs_ProofAlreadySubmitted* = object of SolidityError
diff --git a/codex/market.nim b/codex/market.nim
index bc325cd9..66f31804 100644
--- a/codex/market.nim
+++ b/codex/market.nim
@@ -78,6 +78,9 @@ method proofTimeout*(market: Market): Future[UInt256] {.base, async.} =
 method repairRewardPercentage*(market: Market): Future[uint8] {.base, async.} =
   raiseAssert("not implemented")
 
+method requestDurationLimit*(market: Market): Future[UInt256] {.base, async.} =
+  raiseAssert("not implemented")
+
 method proofDowntime*(market: Market): Future[uint8] {.base, async.} =
   raiseAssert("not implemented")
 
diff --git a/codex/purchasing.nim b/codex/purchasing.nim
index 4ab84405..25a35137 100644
--- a/codex/purchasing.nim
+++ b/codex/purchasing.nim
@@ -14,7 +14,7 @@ export purchase
 
 type
   Purchasing* = ref object
-    market: Market
+    market*: Market
     clock: Clock
     purchases: Table[PurchaseId, Purchase]
     proofProbability*: UInt256
diff --git a/codex/rest/api.nim b/codex/rest/api.nim
index f64a6f20..8ba1abae 100644
--- a/codex/rest/api.nim
+++ b/codex/rest/api.nim
@@ -637,6 +637,14 @@ proc initPurchasingApi(node: CodexNodeRef, router: var RestRouter) =
       without params =? StorageRequestParams.fromJson(body), error:
         return RestApiResponse.error(Http400, error.msg, headers = headers)
 
+      let requestDurationLimit = await contracts.purchasing.market.requestDurationLimit
+      if params.duration > requestDurationLimit:
+        return RestApiResponse.error(
+          Http400,
+          "Duration exceeds limit of " & $requestDurationLimit & " seconds",
+          headers = headers,
+        )
+
       let nodes = params.nodes |? 3
       let tolerance = params.tolerance |? 1
 
diff --git a/codex/validation.nim b/codex/validation.nim
index 6e3135e4..6659bc5b 100644
--- a/codex/validation.nim
+++ b/codex/validation.nim
@@ -22,8 +22,6 @@ type Validation* = ref object
   proofTimeout: UInt256
   config: ValidationConfig
 
-const MaxStorageRequestDuration = 30.days
-
 logScope:
   topics = "codex validator"
 
@@ -122,7 +120,10 @@ proc epochForDurationBackFromNow(
 
 proc restoreHistoricalState(validation: Validation) {.async.} =
   trace "Restoring historical state..."
-  let startTimeEpoch = validation.epochForDurationBackFromNow(MaxStorageRequestDuration)
+  let requestDurationLimit = await validation.market.requestDurationLimit
+  let startTimeEpoch = validation.epochForDurationBackFromNow(
+    seconds(requestDurationLimit.truncate(int64))
+  )
   let slotFilledEvents =
     await validation.market.queryPastSlotFilledEvents(fromTime = startTimeEpoch)
   for event in slotFilledEvents:
diff --git a/config.nims b/config.nims
index 6a4767ad..05a31fff 100644
--- a/config.nims
+++ b/config.nims
@@ -1,21 +1,24 @@
-
 include "build.nims"
 
 import std/os
 const currentDir = currentSourcePath()[0 .. ^(len("config.nims") + 1)]
 
 when getEnv("NIMBUS_BUILD_SYSTEM") == "yes" and
-   # BEWARE
-   # In Nim 1.6, config files are evaluated with a working directory
-   # matching where the Nim command was invocated. This means that we
-   # must do all file existence checks with full absolute paths:
-   system.fileExists(currentDir & "nimbus-build-system.paths"):
+    # BEWARE
+    # In Nim 1.6, config files are evaluated with a working directory
+    # matching where the Nim command was invocated. This means that we
+    # must do all file existence checks with full absolute paths:
+    system.fileExists(currentDir & "nimbus-build-system.paths"):
   include "nimbus-build-system.paths"
 
 when defined(release):
-  switch("nimcache", joinPath(currentSourcePath.parentDir, "nimcache/release/$projectName"))
+  switch(
+    "nimcache", joinPath(currentSourcePath.parentDir, "nimcache/release/$projectName")
+  )
 else:
-  switch("nimcache", joinPath(currentSourcePath.parentDir, "nimcache/debug/$projectName"))
+  switch(
+    "nimcache", joinPath(currentSourcePath.parentDir, "nimcache/debug/$projectName")
+  )
 
 when defined(limitStackUsage):
   # This limits stack usage of each individual function to 1MB - the option is
@@ -34,7 +37,8 @@ when defined(windows):
   # increase stack size
   switch("passL", "-Wl,--stack,8388608")
   # https://github.com/nim-lang/Nim/issues/4057
-  --tlsEmulation:off
+  --tlsEmulation:
+    off
   if defined(i386):
     # set the IMAGE_FILE_LARGE_ADDRESS_AWARE flag so we can use PAE, if enabled, and access more than 2 GiB of RAM
     switch("passL", "-Wl,--large-address-aware")
@@ -63,30 +67,47 @@ else:
     # ("-fno-asynchronous-unwind-tables" breaks Nim's exception raising, sometimes)
     switch("passC", "-mno-avx512vl")
 
---tlsEmulation:off
---threads:on
---opt:speed
---excessiveStackTrace:on
+--tlsEmulation:
+  off
+--threads:
+  on
+--opt:
+  speed
+--excessiveStackTrace:
+  on
 # enable metric collection
---define:metrics
+--define:
+  metrics
 # for heap-usage-by-instance-type metrics and object base-type strings
---define:nimTypeNames
---styleCheck:usages
---styleCheck:error
---maxLoopIterationsVM:1000000000
---fieldChecks:on
---warningAsError:"ProveField:on"
+--define:
+  nimTypeNames
+--styleCheck:
+  usages
+--styleCheck:
+  error
+--maxLoopIterationsVM:
+  1000000000
+--fieldChecks:
+  on
+--warningAsError:
+  "ProveField:on"
 
 when (NimMajor, NimMinor) >= (1, 4):
-  --warning:"ObservableStores:off"
-  --warning:"LockLevel:off"
-  --hint:"XCannotRaiseY:off"
+  --warning:
+    "ObservableStores:off"
+  --warning:
+    "LockLevel:off"
+  --hint:
+    "XCannotRaiseY:off"
 when (NimMajor, NimMinor) >= (1, 6):
-  --warning:"DotLikeOps:off"
+  --warning:
+    "DotLikeOps:off"
 when (NimMajor, NimMinor, NimPatch) >= (1, 6, 11):
-  --warning:"BareExcept:off"
+  --warning:
+    "BareExcept:off"
 when (NimMajor, NimMinor) >= (2, 0):
-  --mm:refc
+  --mm:
+    refc
 
 switch("define", "withoutPCRE")
 
@@ -94,10 +115,12 @@ switch("define", "withoutPCRE")
 # "--debugger:native" build. It can be increased with `ulimit -n 1024`.
 if not defined(macosx):
   # add debugging symbols and original files and line numbers
-  --debugger:native
+  --debugger:
+    native
   if not (defined(windows) and defined(i386)) and not defined(disable_libbacktrace):
     # light-weight stack traces using libbacktrace and libunwind
-    --define:nimStackTraceOverride
+    --define:
+      nimStackTraceOverride
     switch("import", "libbacktrace")
 
 # `switch("warning[CaseTransition]", "off")` fails with "Error: invalid command line option: '--warning[CaseTransition]'"
diff --git a/tests/codex/helpers/mockmarket.nim b/tests/codex/helpers/mockmarket.nim
index bb0eaaa2..3638d11e 100644
--- a/tests/codex/helpers/mockmarket.nim
+++ b/tests/codex/helpers/mockmarket.nim
@@ -122,12 +122,14 @@ proc new*(_: type MockMarket, clock: ?Clock = Clock.none): MockMarket =
     collateral: CollateralConfig(
       repairRewardPercentage: 10,
       maxNumberOfSlashes: 5,
-      slashCriterion: 3,
       slashPercentage: 10,
+      validatorRewardPercentage: 20,
     ),
     proofs: ProofConfig(
       period: 10.u256, timeout: 5.u256, downtime: 64.uint8, downtimeProduct: 67.uint8
     ),
+    reservations: SlotReservationsConfig(maxReservations: 3),
+    requestDurationLimit: (60 * 60 * 24 * 30).u256,
   )
   MockMarket(
     signer: Address.example, config: config, canReserveSlot: true, clock: clock
@@ -142,6 +144,9 @@ method periodicity*(mock: MockMarket): Future[Periodicity] {.async.} =
 method proofTimeout*(market: MockMarket): Future[UInt256] {.async.} =
   return market.config.proofs.timeout
 
+method requestDurationLimit*(market: MockMarket): Future[UInt256] {.async.} =
+  return market.config.requestDurationLimit
+
 method proofDowntime*(market: MockMarket): Future[uint8] {.async.} =
   return market.config.proofs.downtime
 
diff --git a/tests/integration/testrestapi.nim b/tests/integration/testrestapi.nim
index 13b06500..3918791e 100644
--- a/tests/integration/testrestapi.nim
+++ b/tests/integration/testrestapi.nim
@@ -103,6 +103,26 @@ twonodessuite "REST API":
     check responseBefore.status == "400 Bad Request"
     check responseBefore.body == "Tolerance needs to be bigger then zero"
 
+  test "request storage fails if duration exceeds limit", twoNodesConfig:
+    let data = await RandomChunker.example(blocks = 2)
+    let cid = client1.upload(data).get
+    let duration = (31 * 24 * 60 * 60).u256
+      # 31 days TODO: this should not be hardcoded, but waits for https://github.com/codex-storage/nim-codex/issues/1056
+    let proofProbability = 3.u256
+    let expiry = 30.uint
+    let collateralPerByte = 1.u256
+    let nodes = 3
+    let tolerance = 2
+    let pricePerBytePerSecond = 1.u256
+
+    var responseBefore = client1.requestStorageRaw(
+      cid, duration, pricePerBytePerSecond, proofProbability, collateralPerByte, expiry,
+      nodes.uint, tolerance.uint,
+    )
+
+    check responseBefore.status == "400 Bad Request"
+    check "Duration exceeds limit of" in responseBefore.body
+
   test "request storage fails if nodes and tolerance aren't correct", twoNodesConfig:
     let data = await RandomChunker.example(blocks = 2)
     let cid = client1.upload(data).get
diff --git a/vendor/codex-contracts-eth b/vendor/codex-contracts-eth
index 0f2012b1..ff82c26b 160000
--- a/vendor/codex-contracts-eth
+++ b/vendor/codex-contracts-eth
@@ -1 +1 @@
-Subproject commit 0f2012b1442c404605c8ba9dcae2f4e53058cd2c
+Subproject commit ff82c26b3669b52a09280c634141dace7f04659a