diff --git a/planetmint/backend/models/__init__.py b/planetmint/backend/models/__init__.py
index 877cf8e..338209d 100644
--- a/planetmint/backend/models/__init__.py
+++ b/planetmint/backend/models/__init__.py
@@ -9,6 +9,5 @@ from .input import Input
 from .metadata import MetaData
 from .script import Script
 from .output import Output
-from .keys import Keys
 from .dbtransaction import DbTransaction
 from .block import Block
diff --git a/planetmint/backend/models/asset.py b/planetmint/backend/models/asset.py
index e4ab20f..6d9e4a2 100644
--- a/planetmint/backend/models/asset.py
+++ b/planetmint/backend/models/asset.py
@@ -22,8 +22,8 @@ class Asset:
         }
 
     @staticmethod
-    def from_list_dict(asset_tuple_list: list[tuple]) -> list[Asset]:
-        return [Asset.from_dict(asset_tuple) for asset_tuple in asset_tuple_list]
+    def from_list_dict(asset_dict_list: list[dict]) -> list[Asset]:
+        return [Asset.from_dict(asset_dict) for asset_dict in asset_dict_list]
 
     @staticmethod
     def list_to_dict(asset_list: list[Asset]) -> list[dict]:
diff --git a/planetmint/backend/models/dbtransaction.py b/planetmint/backend/models/dbtransaction.py
index fd86cfc..fb9d300 100644
--- a/planetmint/backend/models/dbtransaction.py
+++ b/planetmint/backend/models/dbtransaction.py
@@ -6,8 +6,7 @@
 from __future__ import annotations
 from dataclasses import dataclass
 
-from planetmint.backend.models import Asset, MetaData, Input, Output, Script
-from planetmint.backend.models.keys import Keys
+from planetmint.backend.models import Asset, MetaData, Input, Script
 
 
 @dataclass
diff --git a/planetmint/backend/models/input.py b/planetmint/backend/models/input.py
index 9f2d824..f9e218a 100644
--- a/planetmint/backend/models/input.py
+++ b/planetmint/backend/models/input.py
@@ -47,7 +47,7 @@ class Input:
             else None
         )
 
-        return {"fulfills": fulfills, "fulfillment": self.fulfillment, "owners_before": self.owners_before}
+        return {"owners_before": self.owners_before, "fulfills": fulfills, "fulfillment": self.fulfillment}
 
     @staticmethod
     def from_list_dict(input_tuple_list: list[dict]) -> list[Input]:
diff --git a/planetmint/backend/models/keys.py b/planetmint/backend/models/keys.py
deleted file mode 100644
index 1032061..0000000
--- a/planetmint/backend/models/keys.py
+++ /dev/null
@@ -1,37 +0,0 @@
-# Copyright © 2020 Interplanetary Database Association e.V.,
-# Planetmint and IPDB software contributors.
-# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
-# Code is Apache-2.0 and docs are CC-BY-4.0
-
-from __future__ import annotations
-from dataclasses import dataclass, field
-from typing import Optional
-
-
-@dataclass
-class Keys:
-    tx_id: str = ""
-    output_id: str = ""
-    public_keys: [str] = ""
-
-    @staticmethod
-    def from_dict(output: dict, tx_id: str = "") -> Keys:
-        return Keys(
-            tx_id=tx_id,
-            public_keys=output["public_keys"],
-        )
-
-    @staticmethod
-    def from_tuple(output: tuple) -> Keys:
-        return Keys(
-            tx_id=output[1],
-            output_id=output[2],
-            public_keys=output[3],
-        )
-
-    def to_dict(self) -> dict:
-        return {
-            "tx_id": self.tx_id,
-            "output_id": self.output_id,
-            "public_keys": self.public_keys,
-        }
diff --git a/planetmint/backend/models/metadata.py b/planetmint/backend/models/metadata.py
index 3470728..1603367 100644
--- a/planetmint/backend/models/metadata.py
+++ b/planetmint/backend/models/metadata.py
@@ -14,9 +14,9 @@ class MetaData:
     metadata: Optional[str] = None
 
     @staticmethod
-    def from_dict(meta_data_tuple: dict) -> MetaData:
+    def from_dict(meta_data_tuple: dict) -> MetaData | None:
         if meta_data_tuple is None:
-            return MetaData()
+            return None
         return MetaData(meta_data_tuple["meta_data"])
 
     def to_dict(self) -> dict:
diff --git a/planetmint/backend/models/output.py b/planetmint/backend/models/output.py
index 5bdf674..cde2eb9 100644
--- a/planetmint/backend/models/output.py
+++ b/planetmint/backend/models/output.py
@@ -7,8 +7,6 @@ from __future__ import annotations
 from dataclasses import dataclass, field
 from typing import List
 
-from planetmint.backend.models.keys import Keys
-
 
 @dataclass
 class SubCondition:
@@ -26,7 +24,7 @@ class SubCondition:
 class ConditionDetails:
     type: str = ""
     public_key: str = ""
-    threshold: int = 0
+    threshold: int = None
     sub_conditions: list[SubCondition] = None
 
     @staticmethod
@@ -100,18 +98,18 @@ class Output:
 
     def to_dict(self) -> dict:
         return {
-            "id": self.transaction_id,
-            "amount": self.amount,
+            "id": self.id,
             "public_keys": self.public_keys,
             "condition": {
-                "uri": self.condition.uri,
                 "details": {
                     "type": self.condition.details.type,
                     "public_key": self.condition.details.public_key,
                     "threshold": self.condition.details.threshold,
                     "subconditions": self.condition.details.sub_conditions,
                 },
+                "uri": self.condition.uri,
             },
+            "amount": str(self.amount),
         }
 
 
diff --git a/planetmint/backend/models/script.py b/planetmint/backend/models/script.py
index f4fe267..cd4e793 100644
--- a/planetmint/backend/models/script.py
+++ b/planetmint/backend/models/script.py
@@ -13,9 +13,9 @@ class Script:
     script: dict = None
 
     @staticmethod
-    def from_dict(script_dict: dict) -> Script:
+    def from_dict(script_dict: dict) -> Script | None:
         if script_dict is None:
-            return Script()
+            return None
         return Script(script_dict["script"])
 
     def to_dict(self) -> dict:
diff --git a/planetmint/backend/query.py b/planetmint/backend/query.py
index 5d7ddc9..f1b79b7 100644
--- a/planetmint/backend/query.py
+++ b/planetmint/backend/query.py
@@ -10,7 +10,6 @@ from functools import singledispatch
 from planetmint.backend.models import Asset, MetaData, Output, Input, Script
 
 from planetmint.backend.exceptions import OperationError
-from planetmint.backend.models.keys import Keys
 from planetmint.backend.interfaces import Block
 from planetmint.backend.models.dbtransaction import DbTransaction
 
@@ -208,31 +207,6 @@ def get_block_with_transaction(connection, txid):
     raise NotImplementedError
 
 
-@singledispatch
-def get_metadata_by_tx_id(connection, transaction_id: str) -> MetaData:
-    """Get metadata from the metadata table containing `transaction_id`.
-
-    Args:
-        transaction_id (str): id for the metadata to be retrieved from
-        the database.
-
-    Returns:
-        metadata (MetaData): the list of returned metadata.
-    """
-    raise NotImplementedError
-
-
-@singledispatch
-def store_transaction_outputs_and_keys(connection, output: Output, index: int):
-    """Store the transaction outputs.
-
-    Args:
-        output (Output): the output to store.
-        index (int): the index of the output in the transaction.
-    """
-    raise NotImplementedError
-
-
 @singledispatch
 def store_transaction_outputs(connection, output: Output, index: int):
     """Store the transaction outputs.
@@ -244,31 +218,6 @@ def store_transaction_outputs(connection, output: Output, index: int):
     raise NotImplementedError
 
 
-@singledispatch
-def store_transaction_keys(connection, keys: [Keys], output_id: str, index: int):
-    """Store the transaction keys.
-
-    Args:
-        input (Input): the input to store.
-        index (int): the index of the input in the transaction.
-    """
-    raise NotImplementedError
-
-
-@singledispatch
-def get_metadata(connection, transaction_ids) -> list[MetaData]:
-    """Get a list of metadata from the metadata table.
-
-    Args:
-        transaction_ids (list): a list of ids for the metadata to be retrieved from
-        the database.
-
-    Returns:
-        metadata (list): the list of returned metadata.
-    """
-    raise NotImplementedError
-
-
 @singledispatch
 def get_assets(connection, asset_ids) -> list[Asset]:
     """Get a list of assets from the assets table.
@@ -547,6 +496,6 @@ def get_outputs_by_tx_id(connection, tx_id: str) -> list[Output]:
 
 
 @singledispatch
-def get_keys_by_tx_id(connection, tx_id: str) -> list[Keys]:
-    """Retrieve keys for a transaction by its id"""
-    raise NotImplementedError
+def get_metadata(conn, transaction_ids):
+    """Retrieve metadata for a list of transactions by their ids"""
+    raise NotImplementedError
\ No newline at end of file
diff --git a/planetmint/backend/tarantool/query.py b/planetmint/backend/tarantool/query.py
index 2344cd2..649dd39 100644
--- a/planetmint/backend/tarantool/query.py
+++ b/planetmint/backend/tarantool/query.py
@@ -70,7 +70,6 @@ def store_transaction_outputs(connection, output: Output, index: int) -> str:
 def store_transactions(connection, signed_transactions: list):
     for transaction in signed_transactions:
         store_transaction(connection, transaction)
-
         [
             store_transaction_outputs(connection, Output.outputs_dict(output, transaction["id"]), index)
             for index, output in enumerate(transaction[TARANT_TABLE_OUTPUT])
diff --git a/planetmint/lib.py b/planetmint/lib.py
index ed029bf..fd7ec1e 100644
--- a/planetmint/lib.py
+++ b/planetmint/lib.py
@@ -38,6 +38,7 @@ from transactions.common.transaction_mode_types import BROADCAST_TX_COMMIT, BROA
 from transactions.types.elections.election import Election
 from transactions.types.elections.validator_utils import election_id_to_public_key
 
+from planetmint.backend.models import Output
 from planetmint.config import Config
 from planetmint import backend, config_utils, fastquery
 from planetmint.tendermint_utils import (
@@ -385,11 +386,11 @@ class Planetmint(object):
             if spent:
                 raise DoubleSpend("input `{}` was already spent".format(input_txid))
 
-
             output = _output[input_.fulfills.output]
             input_conditions.append(output)
             tx_dict = input_tx.to_dict()
-            tx_dict["outputs"] = output.to_dict()
+            tx_dict["outputs"] = Output.list_to_dict(_output)
+            tx_dict = remove_generated_fields(tx_dict)
             pm_transaction = Transaction.from_dict(tx_dict, False)
             input_txs.append(pm_transaction)
 
@@ -927,3 +928,16 @@ class Planetmint(object):
 
 
 Block = namedtuple("Block", ("app_hash", "height", "transactions"))
+
+
+def remove_generated_fields(tx_dict: dict):
+    tx_dict["outputs"] = [remove_generated_or_none_output_keys(output) for output in tx_dict["outputs"]]
+    if tx_dict["script"] is None:
+        tx_dict.pop("script")
+    return tx_dict
+
+
+def remove_generated_or_none_output_keys(output):
+    output["condition"]["details"] = {k: v for k, v in output["condition"]["details"].items() if v is not None}
+    output.pop("id")
+    return output