Revert "[reputation_calculation] updated deployment"

This reverts commit 13f19551.

src/data-hub/reputation-calculation-microservice/app/configs/swagger_local.yml

+swagger: "2.0"
+info:
+  title: Reputation Calculation microservice
+  description: This is the documentation for the reputation calculation microservice.
+  version: "1.0.0"
+
+consumes:
+  - "application/json"
+produces:
+  - "application/json"
+
+basePath: "/api"
+
+# Import security definitions from seperate file
+securityDefinitions:
+  $ref: '../../../../modules/security/security_local.yml#securityDefinitions'
+
+paths:
+  $ref: 'routes.yml#paths'
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/debug.py

+from flask import request
+
+def echo():
+    return request.json
+
+ 
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/database/entities/context.py

+from typing import Dict
+
+class Context:
+    def __init__(self, use_case:str, name:str):
+        self.use_case = use_case
+        self.name = name
+    
+    def to_serializable_dict(self):
+        return {
+            "use_case": self.use_case,
+            "name": self.name
+        }
+    
+    @staticmethod
+    def from_serializable_dict(data: Dict):
+        if "use_case" not in data.keys() or "name" not in data.keys():
+            raise ValueError("Missing fields!")
+
+        return Context(data["use_case"], data["name"])
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/database/entities/trust_adapter.py

+from typing import Dict
+
+
+class TrustAdapter:
+    def __init__(self, use_case: str, context: str, table: str, user_source: str, volume_source: str,
+                 rating_source: str, rating_lower: float, rating_upper: float, conversion: float, 
+                 certainty: float, cutoff: float, bias_negative: float, bias_positive: float):
+        self.use_case = use_case
+        self.context = context
+        self.table = table
+        self.user_source = user_source
+        self.volume_source = volume_source
+        self.rating_source = rating_source
+        self.rating_lower = rating_lower
+        self.rating_upper = rating_upper
+        self.conversion = conversion
+        self.certainty = certainty
+        self.cutoff = cutoff
+        self.bias_negative = bias_negative
+        self.bias_positive = bias_positive
+
+    def to_serializable_dict(self):
+        return {
+            "use_case": self.use_case,
+            "context": self.context,
+            "table": self.table,
+            "user_source": self.user_source,
+            "volume_source": self.volume_source,
+            "rating_source": self.rating_source,
+            "rating_lower": self.rating_lower,
+            "rating_upper": self.rating_upper,
+            "conversion": self.conversion,
+            "certainty": self.certainty,
+            "cutoff": self.cutoff,
+            "bias_negative": self.bias_negative,
+            "bias_positive": self.bias_positive
+        }
+
+    @staticmethod
+    def from_serializable_dict(data: Dict):
+        if "use_case" not in data.keys() or "context" not in data.keys() or "table" not in data.keys() or "user_source" not in data.keys() or "volume_source" not in data.keys() or "rating_source" not in data.keys() or "conversion" not in data.keys() or "certainty" not in data.keys() or "cutoff" not in data.keys() or "bias_negative" not in data.keys() or "bias_positive" not in data.keys():
+            raise ValueError("Missing fields for TrustAdapter!")
+
+        return TrustAdapter(
+            data["use_case"],
+            data["context"],
+            data["table"],
+            data["user_source"],
+            data["volume_source"],
+            data["rating_source"],
+            data["rating_lower"],
+            data["rating_upper"],
+            data["conversion"],
+            data["certainty"],
+            data["cutoff"],
+            data["bias_negative"],
+            data["bias_positive"],
+        )

src/data-hub/reputation-calculation-microservice/app/lib/database/entities/trust_trace.py

+from datetime import datetime
+from lib.trust.transaction import Transaction
+from typing import Dict
+
+
+class TrustTrace(Transaction):
+    def __init__(self, use_case: str, context: str, user: str, table: str, volume: float, timestamp: datetime, is_trustworthy: float = 1):
+        super().__init__(timestamp, volume, is_trustworthy=is_trustworthy)
+
+        self.use_case = use_case
+        self.context = context
+        self.user = user
+        self.table = table
+
+    def to_serializable_dict(self):
+        return {
+            "volume": self.volume,
+            "trustworthy": self.trustworthy,
+            "timestamp": self.timestamp.isoformat(),
+            "use_case": self.use_case,
+            "context": self.context,
+            "user": self.user,
+            "table": self.table,
+        }
+
+    @staticmethod
+    def from_serializable_dict(data: Dict):
+        if "volume" not in data.keys() or "trustworthy" not in data.keys() or "timestamp" not in data.keys() or "use_case" not in data.keys() or "context" not in data.keys() or "user" not in data.keys() or "table" not in data.keys():
+            raise ValueError("Missing fields for User!")
+
+        return TrustTrace(
+            data["use_case"],
+            data["context"],
+            data["table"],
+            data["volume"],
+            datetime.fromisoformat(data["timestamp"]),
+            is_trustworthy=data["trustworthy"]
+        )

src/data-hub/reputation-calculation-microservice/app/lib/database/entities/user.py

+from lib.database.entities.user_trust import UserTrust
+from datetime import datetime
+from typing import Dict, List
+
+
+class User:
+    def __init__(self, use_case: str, name: str, context_trust: List[UserTrust] = []):
+        self.use_case = use_case
+        self.name = name
+        self.context_trust = context_trust
+
+    def to_serializable_dict(self, include_trust: bool = False):
+        if include_trust:
+            return {
+                "use_case": self.use_case,
+                "name": self.name,
+                "context_trust": [t.to_serializable_dict() for t in self.context_trust]
+            }
+        else:
+            return {
+                "use_case": self.use_case,
+                "name": self.name
+            }
+
+    @staticmethod
+    def from_serializable_dict(data: Dict):
+        if "use_case" not in data.keys() or "name" not in data.keys():
+            raise ValueError("Missing fields for User!")
+
+        return User(data["use_case"], data["name"])

src/data-hub/reputation-calculation-microservice/app/lib/database/entities/user_trust.py

+from datetime import datetime
+from typing import Dict
+
+class UserTrust:
+    def __init__(self, use_case: str, context: str, user: str, t: float, last_update: datetime):
+        self.use_case = use_case
+        self.context = context
+        self.user = user
+        self.t = t
+        self.last_update = last_update
+
+    
+    def to_serializable_dict(self):
+        return {
+            "use_case": self.use_case,
+            "context": self.context,
+            "user": self.user,
+            "t": self.t,
+            "last_update": self.last_update
+        }
+    
+    @staticmethod
+    def from_serializable_dict(data: Dict):
+        if "use_case" not in data.keys() or "context" not in data.keys() or "user" not in data.keys() or "t" not in data.keys() or "last_update" not in data.keys():
+            raise ValueError("Missing fields for User!")
+
+        return UserTrust(data["use_case"], data["context"], data["user"], data["t"], data["last_update"])
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/database/repositories/context_repository.py

+# global imports (dont't worry, red is normal)
+import network_constants as netconst
+from database.MongoRepositoryBase import MongoRepositoryBase
+
+from lib.database.entities.context import Context
+from typing import List, Dict
+
+class ContextRepository(MongoRepositoryBase):
+    '''This is a repository for MongoDb.'''
+
+    def __init__(self):
+        super().__init__(netconst.REPUTATION_CALCULATION_DB_HOSTNAME,
+                         netconst.REPUTATION_CALCULATION_DB_PORT,
+                         'reputation-computation-db')
+        self._collection = 'context'
+
+    def add(self, context: Context):
+        super().insert_entry(self._collection, context.to_serializable_dict())
+
+    def all(self) -> List[Dict]:
+        result = super().get_entries(self._collection, projection={'_id': False})
+
+        return list(result)
+
+    def all_for_use_case(self, use_case: str) -> List[Dict]:
+        result = super().get_entries(self._collection, projection={'_id': False}, selection={"use_case": use_case})
+
+        return list(result)
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/database/repositories/trust_adapter_repository.py

+# global imports (dont't worry, red is normal)
+import network_constants as netconst
+from database.MongoRepositoryBase import MongoRepositoryBase
+
+from lib.database.entities.trust_adapter import TrustAdapter
+from typing import List, Dict
+
+class TrustAdapterRepository(MongoRepositoryBase):
+    '''This is a repository for MongoDb.'''
+
+    def __init__(self):
+        super().__init__(netconst.REPUTATION_CALCULATION_DB_HOSTNAME,
+                         netconst.REPUTATION_CALCULATION_DB_PORT,
+                         'reputation-computation-db')
+        self._collection = 'trust_adapter'
+
+    def add(self, adapter: TrustAdapter):
+        super().insert_entry(self._collection, adapter.to_serializable_dict())
+
+    def all(self) -> List[Dict]:
+        result = super().get_entries(self._collection, projection={'_id': False})
+
+        return list(result)
+
+    def all_for_use_case_and_context(self, use_case: str, context: str) -> List[Dict]:
+        result = super().get_entries(
+            self._collection, 
+            projection={'_id': False}, 
+            selection={"use_case": use_case, "context": context}
+        )
+
+        return list(result)
+    
+    def all_for_use_case_and_table(self, use_case: str, table: str) -> List[Dict]:
+        result = super().get_entries(
+            self._collection, 
+            projection={'_id': False}, 
+            selection={"use_case": use_case, "table": table}
+        )
+
+        return list(result)
+
+    def one_for_use_case_and_context_and_table(self, use_case: str, context: str, table: str) -> Dict:
+        result = super().get_entries(
+            self._collection, 
+            projection={'_id': False}, 
+            selection={"use_case": use_case, "context": context, "table": table}
+        )
+
+        result = list(result)
+
+        if len(result) != 1:
+            return None
+
+        return result[0]
+
+        
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/database/repositories/trust_trace_repository.py

+# global imports (dont't worry, red is normal)
+import network_constants as netconst
+from database.MongoRepositoryBase import MongoRepositoryBase
+
+from lib.database.entities.trust_trace import TrustTrace
+from typing import List, Dict
+
+
+class TrustTraceRepository(MongoRepositoryBase):
+    '''This is a repository for MongoDb.'''
+
+    def __init__(self):
+        super().__init__(netconst.REPUTATION_CALCULATION_DB_HOSTNAME,
+                         netconst.REPUTATION_CALCULATION_DB_PORT,
+                         'reputation-computation-db')
+        self._collection = 'trust_trace'
+
+    def add(self, trace: TrustTrace):
+        super().insert_entry(self._collection, trace.to_serializable_dict())
+
+    def all(self) -> List[Dict]:
+        result = super().get_entries(
+            self._collection, projection={'_id': False})
+
+        return list(result)
+
+    def all_for_use_case_and_context(self, use_case: str, context: str) -> List[Dict]:
+        result = super().get_entries(
+            self._collection,
+            projection={'_id': False},
+            selection={"use_case": use_case, "context": context}
+        )
+
+        return list(result)

src/data-hub/reputation-calculation-microservice/app/lib/database/repositories/user_repository.py

+# global imports (dont't worry, red is normal)
+import network_constants as netconst
+from database.MongoRepositoryBase import MongoRepositoryBase
+
+from lib.database.entities.user import User
+from lib.database.entities.user_trust import UserTrust
+from lib.database.repositories.user_trust_repository import UserTrustRepository
+from typing import List, Dict
+
+
+class UserRepository(MongoRepositoryBase):
+    '''This is a repository for MongoDb.'''
+
+    _user_trust_repository = UserTrustRepository()
+
+    def __init__(self):
+        super().__init__(netconst.REPUTATION_CALCULATION_DB_HOSTNAME,
+                         netconst.REPUTATION_CALCULATION_DB_PORT,
+                         'reputation-computation-db')
+        self._collection = 'user'
+
+    def add(self, user: User):
+        super().insert_entry(self._collection, user.to_serializable_dict())
+
+    def all(self) -> List[User]:
+        result = super().get_entries(
+            self._collection, projection={'_id': False})
+        result = [User.from_serializable_dict(row) for row in list(result)]
+
+        for user in result:
+            self._enrich_user(user)
+
+        return result
+
+    def all_for_use_case(self, use_case: str) -> List[User]:
+        result = super().get_entries(self._collection, projection={
+            '_id': False}, selection={"use_case": use_case})
+
+        result = [User.from_serializable_dict(row) for row in list(result)]
+
+        for user in result:
+            self._enrich_user(user)
+
+        return result
+
+    def one_by_use_case_and_username(self, use_case: str, username: str) -> User:
+        result = list(super().get_entries(self._collection, projection={
+            '_id': False}, selection={"use_case": use_case, "name": username}))
+
+        if len(result) != 1:
+            return None
+
+        user: User = User.from_serializable_dict(result[0])
+        self._enrich_user(user)
+
+        return user
+
+    def _enrich_user(self, user: User) -> User:
+        user.context_trust = self._user_trust_repository.all_for_user(user)

src/data-hub/reputation-calculation-microservice/app/lib/database/repositories/user_trust_repository.py

+# global imports (dont't worry, red is normal)
+import network_constants as netconst
+from database.MongoRepositoryBase import MongoRepositoryBase
+
+from lib.database.entities.user import User
+from lib.database.entities.user_trust import UserTrust
+from typing import List, Dict
+
+
+class UserTrustRepository(MongoRepositoryBase):
+    '''This is a repository for MongoDb.'''
+
+    def __init__(self):
+        super().__init__(netconst.REPUTATION_CALCULATION_DB_HOSTNAME,
+                         netconst.REPUTATION_CALCULATION_DB_PORT,
+                         'reputation-computation-db')
+        self._collection = 'user_trust'
+
+    def add(self, user_trust: UserTrust):
+        super().insert_entry(self._collection, user_trust.to_serializable_dict())
+
+    def all(self) -> List[UserTrust]:
+        result = super().get_entries(
+            self._collection, projection={'_id': False})
+
+        return [UserTrust.from_serializable_dict(row) for row in list(result)]
+
+    def all_for_use_case(self, use_case: str) -> List[UserTrust]:
+        result = super().get_entries(self._collection, projection={
+            '_id': False}, selection={"use_case": use_case})
+
+        return [UserTrust.from_serializable_dict(row) for row in list(result)]
+
+    def all_for_user(self, user: User) -> List[UserTrust]:
+        result = super().get_entries(self._collection, projection={
+            '_id': False}, selection={"use_case": user.use_case, "user": user.name})
+
+        return [UserTrust.from_serializable_dict(row) for row in list(result)]
+
+    def one_for_user_and_context(self, user: User, context: str) -> UserTrust:
+        result = super().get_entries(self._collection, projection={'_id': False}, selection={
+            "use_case": user.use_case, "user": user.name, "context": context})
+
+        result = list(result)
+
+        if len(result) != 1:
+            return None
+
+        return UserTrust.from_serializable_dict(result[0])
+
+    def update(self, user_trust: UserTrust):
+        collection = self._database[self._collection]
+        collection.update_one({"use_case": user_trust.use_case, "context": user_trust.context, "user": user_trust.user}, {
+                              "$set": user_trust.to_serializable_dict()})

src/data-hub/reputation-calculation-microservice/app/lib/routes/context.py

+from lib.database.entities.context import Context
+from lib.database.repositories.context_repository import ContextRepository
+from flask import request, Response
+
+context_repository: ContextRepository = ContextRepository()
+
+def add(use_case: str):
+    data = request.json
+
+    context_new = None
+    try:
+        context_new = Context.from_serializable_dict(data)
+    except ValueError:
+        return Response(status=400, response="Missing fields in request")
+    
+    if context_new.use_case != use_case:
+        return Response(status = 400, response="Use-Cases in body and url do not match!")
+    
+    context_repository.add(context_new)
+
+    return context_new.to_serializable_dict()
+
+def all_for_use_case(use_case: str):
+    return context_repository.all_for_use_case(use_case)

src/data-hub/reputation-calculation-microservice/app/lib/routes/traces.py

+from lib.services.trust_service import TrustService
+from typing import Dict
+from flask import request, Response
+
+from lib.database.repositories.trust_adapter_repository import TrustAdapterRepository
+from lib.database.repositories.user_repository import UserRepository
+from lib.database.repositories.user_trust_repository import UserTrustRepository
+from lib.database.repositories.trust_trace_repository import TrustTraceRepository
+
+trust_service: TrustService = TrustService(
+    TrustAdapterRepository(),
+    UserRepository(),
+    UserTrustRepository(),
+    TrustTraceRepository()
+)
+
+def add(use_case: str, table: str):
+    data: Dict = request.json
+
+    trust_service.updateSystem(use_case, table, data["properties"])
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/routes/trust_adapter.py

+from lib.database.repositories.context_repository import ContextRepository
+from lib.database.entities.context import Context
+from lib.database.entities.trust_adapter import TrustAdapter
+from lib.database.repositories.context_repository import ContextRepository
+from lib.database.repositories.trust_adapter_repository import TrustAdapterRepository
+
+from flask import request, Response
+from typing import List
+
+context_repository: ContextRepository = ContextRepository()
+trust_adapter_repository: TrustAdapterRepository = TrustAdapterRepository()
+
+
+def add(use_case: str, context: str):
+    _ensure_context_exists_for_use_case(use_case, context)
+
+    data = request.json
+
+    adapter_new: TrustAdapter = None
+    try:
+        adapter_new = TrustAdapter.from_serializable_dict(data)
+    except ValueError:
+        return Response(status=400, response="Missing fields in request")
+
+    if adapter_new.context != context:
+        return Response(status=400, response="Context in body and url do not match!")
+
+    if adapter_new.use_case != use_case:
+        return Response(status=400, response="Use-Cases in body and url do not match!")
+
+    adapter_reference = trust_adapter_repository.one_for_use_case_and_context_and_table(
+        use_case, context, adapter_new.table)
+    if adapter_reference != None:
+        return Response(status=400, response="There already exists a TrustAdapter for this use-case/context/table")
+
+    trust_adapter_repository.add(adapter_new)
+
+    return adapter_new.to_serializable_dict()
+
+
+def all_for_use_case_and_context(use_case: str, context: str):
+    _ensure_context_exists_for_use_case(use_case, context)
+
+    return trust_adapter_repository.all_for_use_case_and_context(use_case, context)
+
+
+def _ensure_context_exists_for_use_case(use_case: str, context: str) -> Context:
+    contexts: List[Context] = context_repository.all_for_use_case(use_case)
+    target_context = None
+    for c in contexts:
+        if c["name"] == context:
+            target_context = c
+            break
+    if target_context == None:
+        return Response(status=404, response=f"Context {context} not found!")
+
+    return Context.from_serializable_dict(target_context)

src/data-hub/reputation-calculation-microservice/app/lib/routes/user.py

+from lib.database.entities.user import User
+from lib.database.repositories.user_repository import UserRepository
+from flask import request, Response
+
+user_repository: UserRepository = UserRepository()
+
+def add(use_case: str):
+    data = request.json
+
+    user_new = None
+    try:
+        user_new = User.from_serializable_dict(data)
+    except ValueError:
+        return Response(status=400, response="Missing fields in request")
+    
+    if user_new.use_case != use_case:
+        return Response(status = 400, response="Use-Cases in body and url do not match!")
+    
+    user_repository.add(user_new)
+
+    return user_new.to_serializable_dict()
+
+def all_for_use_case(use_case: str):
+    return [user.to_serializable_dict(include_trust=True) for user in user_repository.all_for_use_case(use_case)]

src/data-hub/reputation-calculation-microservice/app/lib/services/trust_service.py

+from lib.database.entities.trust_trace import TrustTrace
+from lib.database.entities.user_trust import UserTrust
+from lib.trust.oracle import TrustOracle
+from lib.database.entities.trust_adapter import TrustAdapter
+from lib.database.entities.user import User
+from typing import Dict, List
+import logging
+from datetime import datetime
+
+LOGGER = logging.getLogger(__name__)
+
+
+class TrustService:
+
+    def __init__(self, adapter_repository, user_repository, user_trust_repository, trust_trace_repository):
+        self._adapter_repository = adapter_repository
+        self._user_repository = user_repository
+        self._user_trust_repository = user_trust_repository
+        self._trust_trace_repository = trust_trace_repository
+
+    def updateSystem(self, use_case: str, table: str, properties: Dict):
+        adapters: List[TrustAdapter] = [TrustAdapter.from_serializable_dict(row) for row in self._adapter_repository.all_for_use_case_and_table(
+            use_case, table)]
+
+        if len(adapters) == 0:
+            LOGGER.warning(
+                f"No Trust-Adapters found for Trace(use-case:{use_case}, table:{table}), aborting...")
+            return
+
+        for adapter in adapters:
+            if adapter.user_source not in properties.keys() or adapter.volume_source not in properties.keys() or adapter.rating_source not in properties.keys():
+                raise ValueError(
+                    f"Trace does not contain needed fields for trust-computation. Required fields: {adapter.user_source}, {adapter.volume_source}. Present fields: {properties.keys()}")
+
+            username: str = properties[adapter.user_source]
+            volume: float = properties[adapter.volume_source]
+            rating: float = properties[adapter.rating_source]
+
+            # retrieve user (create one if it doesnt exist)
+            user: User = self._user_repository.one_by_use_case_and_username(
+                use_case, username)
+            if user == None:
+                user = User(use_case, username)
+                self._user_repository.add(user)
+
+            trace: TrustTrace = TrustTrace(
+                use_case,
+                adapter.context,
+                user.name,
+                adapter.table,
+                volume,
+                datetime.now(),
+                is_trustworthy=(((rating - adapter.rating_lower) /
+                                 (adapter.rating_upper - adapter.rating_lower)) * 2) - 1
+            )
+
+            # retrieve user_trust for the trace (create one if it doesnt exist)
+            target_trust: UserTrust = None
+            for user_trust in user.context_trust:
+                if user_trust.context == adapter.context:
+                    target_trust = user_trust
+                    break
+            if target_trust == None:
+                target_trust = UserTrust(
+                    use_case, adapter.context, user.name, 0, datetime(1, 1, 1, 0, 0))
+                self._user_trust_repository.add(target_trust)
+                user.context_trust.append(target_trust)
+
+            oracle: TrustOracle = TrustOracle(
+                adapter.conversion, adapter.certainty)
+            delta_t = oracle.calculate_trust_single(trace)
+
+            target_trust.t += delta_t
+            target_trust.last_update = trace.timestamp
+
+            self._trust_trace_repository.add(trace)
+            self._user_trust_repository.update(target_trust)

src/data-hub/reputation-calculation-microservice/app/lib/trust/message_handler.py

+from lib.services.trust_service import TrustService
+from typing import Dict
+import json
+import logging
+
+LOGGER = logging.getLogger(__name__)
+
+
+class MessageHandler:
+    def __init__(self, trust_adapter_repository, user_repository, user_trust_repository, trust_trace_repository):
+        self.trust_adapter_repository = trust_adapter_repository
+        self.user_repository = user_repository
+        self.user_trust_repository = user_trust_repository
+        self.trust_trace_repository = trust_trace_repository
+
+    def handle(self, body: str):
+        # decode the message
+        data: Dict = None
+        try:
+            data = json.loads(body)
+        except json.decoder.JSONDecodeError:
+            raise ValueError("Invalid Message: Not in JSON format")
+
+        if "type" not in data.keys() or "content" not in data.keys():
+            raise ValueError(
+                "Invalid Message: Missing fields \"type\" or \"content\"")
+
+        if data["type"] != "new-trace":
+            return
+
+        content: Dict = data["content"]
+
+        if "use_case" not in content.keys() or "table" not in content.keys() or "properties" not in content.keys():
+            raise ValueError(
+                "Invalid Message: Missing fields \"use_case\" or \"table\" or \"properties\"")
+
+        use_case: str = content["use_case"]
+        table: str = content["table"]
+        properties: Dict = content["properties"]
+
+        trust_service: TrustService = TrustService(
+            self.trust_adapter_repository,
+            self.user_repository,
+            self.user_trust_repository,
+            self.trust_trace_repository
+        )
+
+        trust_service.updateSystem(use_case, table, properties)
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/trust/node.py

+class Node:
+    def __init__(self, initial_t=0):
+        self.t = initial_t
\ No newline at end of file

src/data-hub/reputation-calculation-microservice/app/lib/trust/oracle.py

+import math
+from enum import Enum
+from lib.trust.transaction import Transaction
+from lib.trust.node import Node
+from datetime import datetime
+from typing import List, Dict
+
+
+class TrustLabel(Enum):
+    UNTRUSTWORTHY = 1
+    UNSURE = 2
+    TRUSTWORTHY = 3
+
+
+class TrustOracle:
+    def __init__(self, translate_value: float, knowledge_border: float):
+        # translates transaction volume into unitless x-axis value for sigmoid input
+        self.translate_value = translate_value
+        # nodes must reach a value of at least |trust(node)| = knowledge_border to get a definite label
+        self.knowledge_border = knowledge_border
+
+    def rate_node(self, node: Node) -> TrustLabel:
+        if node.t < -self.knowledge_border:
+            return TrustLabel.UNTRUSTWORTHY
+
+        if node.t > self.knowledge_border:
+            return TrustLabel.TRUSTWORTHY
+
+        return TrustLabel.UNSURE
+
+    def calculate_trust_single(self, node_transaction: Transaction):
+        return self.calculate_trust([node_transaction])
+
+    def calculate_trust(self, node_transactions: List[Transaction]):
+        trust_total = 0
+
+        for transaction in node_transactions:
+            transaction_t = abs(transaction.volume / self.translate_value)
+            trust_total += transaction_t
+
+        return self.translate_t_to_trust_value(trust_total)
+
+    def translate_t_to_trust_value(self, t_value: float):
+        # classic sigmoid function as in https://en.wikipedia.org/wiki/Sigmoid_function
+        sig = 1 / (1 + math.exp(-t_value))
+
+        # rescale it st.:
+        # values are between ]-1;1[
+        sig *= 2
+        sig -= 1
+
+        return sig

src/data-hub/reputation-calculation-microservice/app/lib/trust/transaction.py

+class Transaction:
+    def __init__(self, timestamp, volume=1, is_trustworthy: float = 1):
+        self.volume = volume
+        self.trustworthy = is_trustworthy
+        self.timestamp = timestamp

src/rest-gateway/deployment/deployment.yml

 apiVersion: v1
 kind: Service
 metadata:
-  name: reputation-calculation
+  name: rest-gateway
 spec:
   type: LoadBalancer
   selector:
-      app: reputation-calculation
+      app: rest-gateway
   ports:
     - name: http
       port: 80
       targetPort: 5000
-      nodePort: 30107
+      nodePort: 30401
       protocol: TCP
 ---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: reputation-calculation
+  name: rest-gateway
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: reputation-calculation
+      app: rest-gateway
   template:
     metadata:
       labels:
-        app: reputation-calculation
+        app: rest-gateway
     spec:
       containers:
-      - name: reputation-calculation
-        image: alexx882/reputation-calculation-microservice
+      - name: rest-gateway
+        image: alexx882/rest-gateway
         ports:
         - containerPort: 5000
         imagePullPolicy: Always
@@ -45,34 +45,34 @@ spec:
 apiVersion: v1
 kind: Service
 metadata:
-  name: reputation-calculation-db
+  name: rest-gateway-db
 spec:
   type: LoadBalancer
   selector:
-      app: reputation-calculation-db
+      app: rest-gateway-db
   ports:
     - name: http
       port: 27017
       targetPort: 27017
-      nodePort: 30109
+      nodePort: 30402
       protocol: TCP
 ---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: reputation-calculation-db
+  name: rest-gateway-db
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: reputation-calculation-db
+      app: rest-gateway-db
   template:
     metadata:
       labels:
-        app: reputation-calculation-db
+        app: rest-gateway-db
     spec:
       containers:
-      - name: reputation-calculation-db
+      - name: rest-gateway-db
         image: mongo
         env:
         - name: MONGO_INITDB_ROOT_USERNAME
@@ -85,4 +85,4 @@ spec:
         - mountPath: /data/db
           name: dbdata
       volumes:
-        - name: dbdata
+        - name: dbdata
\ No newline at end of file