fix: join community with keycard (#15635)

* fix: keycard signature add 27
* fix: hash message before signing on keycard

src/app/modules/main/communities/controller.nim

@@ -15,6 +15,7 @@ import app_service/service/keycard/service as keycard_service
 import app_service/common/types
 import app/modules/shared_modules/keycard_popup/io_interface as keycard_shared_module
 import app_service/service/network/network_item
+import ../../../../backend/general as status_general
 
 const UNIQUE_COMMUNITIES_MODULE_AUTH_IDENTIFIER* = "CommunitiesModule-Authentication"
 const UNIQUE_COMMUNITIES_MODULE_SIGNING_IDENTIFIER* = "CommunitiesModule-Signing"
@@ -466,9 +467,10 @@ proc runSignFlow(self: Controller, pin, path, dataToSign: string) =
   self.keycardService.startSignFlow(path, dataToSign, pin)
 
 proc runSigningOnKeycard*(self: Controller, keyUid: string, path: string, dataToSign: string, pin: string) =
-  var finalDataToSign = dataToSign
+  var finalDataToSign = status_general.hashMessageForSigning(dataToSign)
   if finalDataToSign.startsWith("0x"):
     finalDataToSign = finalDataToSign[2..^1]
+  
   if pin.len == 0:
     let data = SharedKeycarModuleSigningArgs(uniqueIdentifier: UNIQUE_COMMUNITIES_MODULE_SIGNING_IDENTIFIER,
       keyUid: keyUid,

src/app/modules/main/communities/module.nim

@@ -732,10 +732,12 @@ method onDataSigned*(self: Module, keyUid: string, path: string, r: string, s: s
     # being here is not an error
     return
 
+  let vFixed = toLower(uint8(parseUint(v) + 27).toHex())
+
   for address, details in self.joiningCommunityDetails.addressesToShare.pairs:
     if details.keyUid != keyUid or details.path != path:
       continue
-    self.joiningCommunityDetails.addressesToShare[address].signature = "0x" & r & s & v
+    self.joiningCommunityDetails.addressesToShare[address].signature = "0x" & r & s & vFixed
     break
   self.signSharedAddressesForKeypair(keyUid, pin)
 

src/backend/general.nim

@@ -85,3 +85,12 @@ proc backupData*(): RpcResponse[JsonNode] =
 
 proc parseSharedUrl*(url: string): RpcResponse[JsonNode] =
   result = callPrivateRPC("parseSharedURL".prefix, %*[url])
+
+proc hashMessageForSigning*(message: string): string =
+  try: 
+    let response = status_go.hashMessage(message)
+    let jsonResponse = parseJson(response)
+    return jsonResponse{"result"}.getStr()
+  except Exception as e:
+    error "hashMessage: failed to parse json response", error = e.msg
+    return ""