diff --git a/bindings/python/iota_sdk/__init__.py b/bindings/python/iota_sdk/__init__.py
index f5ee09fd6c..11d3869198 100644
--- a/bindings/python/iota_sdk/__init__.py
+++ b/bindings/python/iota_sdk/__init__.py
@@ -20,6 +20,7 @@
 from .types.block.body.type import *
 from .types.block.body.validation import *
 from .types.block.metadata import *
+from .types.block.id import *
 from .types.block_builder_options import *
 from .types.block_issuer_key import *
 from .types.burn import *
@@ -43,10 +44,12 @@
 from .types.output_params import *
 from .types.payload import *
 from .types.send_params import *
+from .types.slot import *
 from .types.token_scheme import *
-from .types.transaction_with_metadata import *
 from .types.transaction_data import *
+from .types.transaction_id import *
 from .types.transaction_options import *
+from .types.transaction_with_metadata import *
 from .types.unlock import *
 from .types.unlock_condition import *
 from .types.utxo_changes import *
diff --git a/bindings/python/iota_sdk/client/_high_level_api.py b/bindings/python/iota_sdk/client/_high_level_api.py
index 928d165804..3a0068899b 100644
--- a/bindings/python/iota_sdk/client/_high_level_api.py
+++ b/bindings/python/iota_sdk/client/_high_level_api.py
@@ -5,7 +5,8 @@
 from dataclasses import dataclass
 from abc import ABCMeta, abstractmethod
 from iota_sdk.types.block.block import Block
-from iota_sdk.types.common import CoinType, HexStr, json
+from iota_sdk.types.block.id import BlockId
+from iota_sdk.types.common import CoinType, json
 from iota_sdk.types.output_metadata import OutputWithMetadata
 from iota_sdk.types.output_id import OutputId
 
@@ -111,7 +112,7 @@ def get_outputs_ignore_errors(
         })
         return [OutputWithMetadata.from_dict(o) for o in outputs]
 
-    def find_blocks(self, block_ids: List[HexStr]) -> List[Block]:
+    def find_blocks(self, block_ids: List[BlockId]) -> List[Block]:
         """Find all blocks by provided block IDs.
 
         Args:
diff --git a/bindings/python/iota_sdk/client/_node_core_api.py b/bindings/python/iota_sdk/client/_node_core_api.py
index f149e8c961..7181c491a3 100644
--- a/bindings/python/iota_sdk/client/_node_core_api.py
+++ b/bindings/python/iota_sdk/client/_node_core_api.py
@@ -6,11 +6,13 @@
 from dacite import from_dict
 
 from iota_sdk.types.block.block import Block
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.block.metadata import BlockMetadata, BlockWithMetadata
 from iota_sdk.types.common import HexStr
 from iota_sdk.types.node_info import NodeInfo, NodeInfoWrapper
 from iota_sdk.types.output_metadata import OutputWithMetadata, OutputMetadata
 from iota_sdk.types.output_id import OutputId
+from iota_sdk.types.transaction_id import TransactionId
 
 
 class NodeCoreAPI(metaclass=ABCMeta):
@@ -65,12 +67,12 @@ def get_info(self) -> NodeInfoWrapper:
         """
         return from_dict(NodeInfoWrapper, self._call_method('getInfo'))
 
-    def get_tips(self) -> List[HexStr]:
+    def get_tips(self) -> List[BlockId]:
         """Request tips from the node.
         """
         return self._call_method('getTips')
 
-    def post_block(self, block: Block) -> HexStr:
+    def post_block(self, block: Block) -> BlockId:
         """Post a block.
 
         Args:
@@ -79,47 +81,47 @@ def post_block(self, block: Block) -> HexStr:
         Returns:
             The block id of the posted block.
         """
-        return self._call_method('postBlock', {
+        return BlockId(self._call_method('postBlock', {
             'block': block
-        })
+        }))
 
-    def get_block(self, block_id: HexStr) -> Block:
+    def get_block(self, block_id: BlockId) -> Block:
         """Get the block corresponding to the given block id.
         """
         return Block.from_dict(self._call_method('getBlock', {
             'blockId': block_id
         }))
 
-    def get_block_metadata(self, block_id: HexStr) -> BlockMetadata:
+    def get_block_metadata(self, block_id: BlockId) -> BlockMetadata:
         """Get the block metadata corresponding to the given block id.
         """
         return BlockMetadata.from_dict(self._call_method('getBlockMetadata', {
             'blockId': block_id
         }))
 
-    def get_block_with_metadata(self, block_id: HexStr) -> BlockWithMetadata:
+    def get_block_with_metadata(self, block_id: BlockId) -> BlockWithMetadata:
         """Get a block with its metadata corresponding to the given block id.
         """
         return BlockWithMetadata.from_dict(self._call_method('getBlockWithMetadata', {
             'blockId': block_id
         }))
 
-    def get_block_raw(self, block_id: HexStr) -> List[int]:
+    def get_block_raw(self, block_id: BlockId) -> List[int]:
         """Get the raw bytes of the block corresponding to the given block id.
         """
         return self._call_method('getBlockRaw', {
             'blockId': block_id
         })
 
-    def post_block_raw(self, block_bytes: List[int]) -> HexStr:
+    def post_block_raw(self, block_bytes: List[int]) -> BlockId:
         """Post a block as raw bytes.
 
         Returns:
             The corresponding block id of the block.
         """
-        return self._call_method('postBlockRaw', {
+        return BlockId(self._call_method('postBlockRaw', {
             'blockBytes': block_bytes
-        })
+        }))
 
     def get_output(
             self, output_id: Union[OutputId, HexStr]) -> OutputWithMetadata:
@@ -147,7 +149,7 @@ def get_output_metadata(
             'outputId': output_id_str
         }))
 
-    def get_included_block(self, transaction_id: HexStr) -> Block:
+    def get_included_block(self, transaction_id: TransactionId) -> Block:
         """Returns the included block of the given transaction.
 
         Returns:
@@ -158,7 +160,7 @@ def get_included_block(self, transaction_id: HexStr) -> Block:
         }))
 
     def get_included_block_metadata(
-            self, transaction_id: HexStr) -> BlockMetadata:
+            self, transaction_id: TransactionId) -> BlockMetadata:
         """Returns the metadata of the included block of the given transaction.
 
         Returns:
diff --git a/bindings/python/iota_sdk/client/_utils.py b/bindings/python/iota_sdk/client/_utils.py
index e0be939390..b9a956d2a1 100644
--- a/bindings/python/iota_sdk/client/_utils.py
+++ b/bindings/python/iota_sdk/client/_utils.py
@@ -5,6 +5,7 @@
 from abc import ABCMeta, abstractmethod
 
 from iota_sdk.types.block.block import Block
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.common import HexStr
 from iota_sdk.types.output import Output
 
@@ -88,9 +89,9 @@ def request_funds_from_faucet(self, url: str, address: str) -> str:
             }
         )
 
-    def block_id(self, block: Block) -> HexStr:
+    def block_id(self, block: Block) -> BlockId:
         """ Return a block ID (Blake2b256 hash of block bytes) from a block.
         """
-        return self._call_method('blockId', {
+        return BlockId(self._call_method('blockId', {
             'block': block,
-        })
+        }))
diff --git a/bindings/python/iota_sdk/types/balance.py b/bindings/python/iota_sdk/types/balance.py
index 8745faa35c..1b9a3d4a35 100644
--- a/bindings/python/iota_sdk/types/balance.py
+++ b/bindings/python/iota_sdk/types/balance.py
@@ -7,6 +7,7 @@
 from dataclasses_json import config
 from iota_sdk.types.decayed_mana import DecayedMana
 from iota_sdk.types.common import hex_str_decoder, HexStr, json
+from iota_sdk.types.output_id import OutputId
 
 
 @json
@@ -118,4 +119,4 @@ class Balance:
     foundries: List[HexStr]
     nfts: List[HexStr]
     delegations: List[HexStr]
-    potentially_locked_outputs: dict[HexStr, bool]
+    potentially_locked_outputs: dict[OutputId, bool]
diff --git a/bindings/python/iota_sdk/types/block/block.py b/bindings/python/iota_sdk/types/block/block.py
index 766fcba107..3938565ed0 100644
--- a/bindings/python/iota_sdk/types/block/block.py
+++ b/bindings/python/iota_sdk/types/block/block.py
@@ -9,9 +9,11 @@
 from iota_sdk.types.common import HexStr, json, SlotIndex
 from iota_sdk.types.node_info import ProtocolParameters
 from iota_sdk.types.signature import Signature
+from iota_sdk.types.slot import SlotCommitmentId
 from iota_sdk.types.block.body.basic import BasicBlockBody
 from iota_sdk.types.block.body.validation import ValidationBlockBody
 from iota_sdk.types.block.body.type import BlockBodyType
+from iota_sdk.types.block.id import BlockId
 
 
 @json
@@ -34,7 +36,7 @@ class BlockHeader:
     issuing_time: int = field(metadata=config(
         encoder=str
     ))
-    slot_commitment_id: HexStr
+    slot_commitment_id: SlotCommitmentId
     latest_finalized_slot: SlotIndex
     issuer_id: HexStr
 
@@ -85,7 +87,7 @@ class Block:
     ))
     signature: Signature
 
-    def id(self, params: ProtocolParameters) -> HexStr:
+    def id(self, params: ProtocolParameters) -> BlockId:
         """Returns the block ID as a hexadecimal string.
         """
         return Utils.block_id(self, params)
diff --git a/bindings/python/iota_sdk/types/block/body/basic.py b/bindings/python/iota_sdk/types/block/body/basic.py
index efea797300..41e19a35c6 100644
--- a/bindings/python/iota_sdk/types/block/body/basic.py
+++ b/bindings/python/iota_sdk/types/block/body/basic.py
@@ -5,8 +5,9 @@
 from dataclasses import dataclass, field
 from typing import List, Optional
 from dataclasses_json import config
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.block.body.type import BlockBodyType
-from iota_sdk.types.common import HexStr, json
+from iota_sdk.types.common import json
 from iota_sdk.types.payload import Payload, deserialize_payload
 
 
@@ -26,12 +27,12 @@ class BasicBlockBody:
     type: int = field(
         default_factory=lambda: int(BlockBodyType.Basic),
         init=False)
-    strong_parents: List[HexStr]
+    strong_parents: List[BlockId]
     max_burned_mana: int = field(metadata=config(
         encoder=str
     ))
-    weak_parents: Optional[List[HexStr]] = None
-    shallow_like_parents: Optional[List[HexStr]] = None
+    weak_parents: Optional[List[BlockId]] = None
+    shallow_like_parents: Optional[List[BlockId]] = None
     payload: Optional[Payload] = field(default=None, metadata=config(
         decoder=deserialize_payload
     ))
diff --git a/bindings/python/iota_sdk/types/block/body/validation.py b/bindings/python/iota_sdk/types/block/body/validation.py
index 130eda5ff3..ad1a98c86f 100644
--- a/bindings/python/iota_sdk/types/block/body/validation.py
+++ b/bindings/python/iota_sdk/types/block/body/validation.py
@@ -4,6 +4,7 @@
 from __future__ import annotations
 from dataclasses import dataclass, field
 from typing import List, Optional
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.block.body.type import BlockBodyType
 from iota_sdk.types.common import HexStr, json
 
@@ -25,8 +26,8 @@ class ValidationBlockBody:
     type: int = field(
         default_factory=lambda: int(BlockBodyType.Validation),
         init=False)
-    strong_parents: List[HexStr]
+    strong_parents: List[BlockId]
     highest_supported_version: int
     protocol_parameters_hash: HexStr
-    weak_parents: Optional[List[HexStr]] = None
-    shallow_like_parents: Optional[List[HexStr]] = None
+    weak_parents: Optional[List[BlockId]] = None
+    shallow_like_parents: Optional[List[BlockId]] = None
diff --git a/bindings/python/iota_sdk/types/block/id.py b/bindings/python/iota_sdk/types/block/id.py
new file mode 100644
index 0000000000..0f55d34aae
--- /dev/null
+++ b/bindings/python/iota_sdk/types/block/id.py
@@ -0,0 +1,9 @@
+# Copyright 2024 IOTA Stiftung
+# SPDX-License-Identifier: Apache-2.0
+
+from iota_sdk.types.common import IdWithSlotIndex
+
+
+class BlockId(IdWithSlotIndex):
+    """Represents a block ID.
+    """
diff --git a/bindings/python/iota_sdk/types/block/metadata.py b/bindings/python/iota_sdk/types/block/metadata.py
index b511392e62..521f3d23b3 100644
--- a/bindings/python/iota_sdk/types/block/metadata.py
+++ b/bindings/python/iota_sdk/types/block/metadata.py
@@ -5,8 +5,9 @@
 from enum import Enum, IntEnum
 from dataclasses import dataclass
 from typing import Optional
-from iota_sdk.types.common import HexStr, json
+from iota_sdk.types.common import json
 from iota_sdk.types.block.block import Block
+from iota_sdk.types.block.id import BlockId
 
 
 @json
@@ -21,7 +22,7 @@ class BlockMetadata:
         block_failure_reason: The block failure reason.
         transaction_failure_reason: The transaction failure reason.
     """
-    block_id: HexStr
+    block_id: BlockId
     block_state: BlockState
     transaction_state: Optional[TransactionState] = None
     block_failure_reason: Optional[BlockFailureReason] = None
diff --git a/bindings/python/iota_sdk/types/block_builder_options.py b/bindings/python/iota_sdk/types/block_builder_options.py
index fbcb88703c..7899686ab2 100644
--- a/bindings/python/iota_sdk/types/block_builder_options.py
+++ b/bindings/python/iota_sdk/types/block_builder_options.py
@@ -7,6 +7,7 @@
 from dataclasses_json import config
 from iota_sdk.types.common import HexStr, AddressAndAmount, json
 from iota_sdk.client._high_level_api import Range
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.burn import Burn
 from iota_sdk.types.output import Output
 from iota_sdk.types.input import UtxoInput
@@ -34,7 +35,7 @@ class BlockBuilderOptions:
     custom_remainder_address: Optional[str] = None
     tag: Optional[HexStr] = None
     data: Optional[HexStr] = None
-    strong_parents: Optional[List[HexStr]] = None
-    weak_parents: Optional[List[HexStr]] = None
-    shallow_like_parents: Optional[List[HexStr]] = None
+    strong_parents: Optional[List[BlockId]] = None
+    weak_parents: Optional[List[BlockId]] = None
+    shallow_like_parents: Optional[List[BlockId]] = None
     burn: Optional[Burn] = None
diff --git a/bindings/python/iota_sdk/types/common.py b/bindings/python/iota_sdk/types/common.py
index 2f85d96704..6591e84be4 100644
--- a/bindings/python/iota_sdk/types/common.py
+++ b/bindings/python/iota_sdk/types/common.py
@@ -139,3 +139,18 @@ class AddressAndAmount():
         encoder=str
     ))
     address: str
+
+
+class IdWithSlotIndex(str):
+    """Represents an hex encoded ID that contains a slot index at the end.
+
+    Attributes:
+        id: The hex encoded ID with a slot index.
+
+    """
+
+    def slot_index(self):
+        """Returns the slot index of the ID.
+        """
+        return int.from_bytes(
+            bytes.fromhex(self[-8:]), 'little')
diff --git a/bindings/python/iota_sdk/types/context_input.py b/bindings/python/iota_sdk/types/context_input.py
index 19015f3a28..d67ee093a2 100644
--- a/bindings/python/iota_sdk/types/context_input.py
+++ b/bindings/python/iota_sdk/types/context_input.py
@@ -6,6 +6,7 @@
 from enum import IntEnum
 from typing import Any, Dict, List, TypeAlias, Union
 from iota_sdk.types.common import HexStr, json
+from iota_sdk.types.slot import SlotCommitmentId
 
 
 class ContextInputType(IntEnum):
@@ -29,7 +30,7 @@ class CommitmentContextInput:
         default_factory=lambda: int(
             ContextInputType.Commitment),
         init=False)
-    commitment_id: HexStr
+    commitment_id: SlotCommitmentId
 
 
 @json
diff --git a/bindings/python/iota_sdk/types/input.py b/bindings/python/iota_sdk/types/input.py
index 53da298111..e599908b9d 100644
--- a/bindings/python/iota_sdk/types/input.py
+++ b/bindings/python/iota_sdk/types/input.py
@@ -5,7 +5,8 @@
 from enum import IntEnum
 from typing import Dict, List, TypeAlias, Union, Any
 from dataclasses import dataclass, field
-from iota_sdk.types.common import HexStr, json
+from iota_sdk.types.common import json
+from iota_sdk.types.transaction_id import TransactionId
 
 
 class InputType(IntEnum):
@@ -31,7 +32,7 @@ class UtxoInput:
         default_factory=lambda: int(
             InputType.Utxo),
         init=False)
-    transaction_id: HexStr
+    transaction_id: TransactionId
     transaction_output_index: int
 
 
diff --git a/bindings/python/iota_sdk/types/node_info.py b/bindings/python/iota_sdk/types/node_info.py
index 37dd91f024..63f7803f4d 100644
--- a/bindings/python/iota_sdk/types/node_info.py
+++ b/bindings/python/iota_sdk/types/node_info.py
@@ -5,7 +5,8 @@
 from dataclasses import dataclass, field
 from typing import List, Optional
 from dataclasses_json import config
-from iota_sdk.types.common import EpochIndex, HexStr, json, SlotIndex
+from iota_sdk.types.common import EpochIndex, json, SlotIndex
+from iota_sdk.types.slot import SlotCommitmentId
 
 
 @json
@@ -38,7 +39,7 @@ class NodeInfoStatus:
     relative_confirmed_tangle_time: int = field(metadata=config(
         encoder=str
     ))
-    latest_commitment_id: HexStr
+    latest_commitment_id: SlotCommitmentId
     latest_finalized_slot: SlotIndex
     latest_accepted_block_slot: SlotIndex
     latest_confirmed_block_slot: SlotIndex
diff --git a/bindings/python/iota_sdk/types/output_data.py b/bindings/python/iota_sdk/types/output_data.py
index e18c7938e3..189449764f 100644
--- a/bindings/python/iota_sdk/types/output_data.py
+++ b/bindings/python/iota_sdk/types/output_data.py
@@ -5,8 +5,9 @@
 from dataclasses import dataclass
 from typing import Optional
 from iota_sdk.types.address import Address
-from iota_sdk.types.common import HexStr, json
+from iota_sdk.types.common import json
 from iota_sdk.types.output import Output
+from iota_sdk.types.output_id import OutputId
 from iota_sdk.types.output_metadata import OutputMetadata
 from iota_sdk.types.signature import Bip44
 
@@ -25,7 +26,7 @@ class OutputData():
         remainder: Whether the output represents a remainder amount.
         chain: A list of chain state indexes.
     """
-    output_id: HexStr
+    output_id: OutputId
     metadata: OutputMetadata
     output: Output
     address: Address
diff --git a/bindings/python/iota_sdk/types/output_id.py b/bindings/python/iota_sdk/types/output_id.py
index 0a824cfd47..b666779fbd 100644
--- a/bindings/python/iota_sdk/types/output_id.py
+++ b/bindings/python/iota_sdk/types/output_id.py
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 from iota_sdk.types.common import HexStr
+from iota_sdk.types.transaction_id import TransactionId
 
 
 class OutputId(dict):
@@ -14,17 +15,17 @@ class OutputId(dict):
 
     """
 
-    def __init__(self, transaction_id: HexStr, output_index: int):
+    def __init__(self, transaction_id: TransactionId, output_index: int):
         """Initialize OutputId
         """
-        if len(transaction_id) != 66:
+        if len(transaction_id) != 74:
             raise ValueError(
-                'transaction_id length must be 66 characters with 0x prefix')
+                'transaction_id length must be 74 characters with 0x prefix')
         if not transaction_id.startswith('0x'):
             raise ValueError('transaction_id must start with 0x')
         # Validate that it has only valid hex characters
         int(transaction_id[2:], 16)
-        output_index_hex = (output_index).to_bytes(4, "little").hex()
+        output_index_hex = (output_index).to_bytes(2, "little").hex()
         self.output_id = transaction_id + output_index_hex
         self.transaction_id = transaction_id
         self.output_index = output_index
@@ -49,9 +50,9 @@ def from_string(cls, output_id: HexStr):
         # Validate that it has only valid hex characters
         int(output_id[2:], 16)
         obj.output_id = output_id
-        obj.transaction_id = HexStr(output_id[:66])
+        obj.transaction_id = TransactionId(output_id[:74])
         obj.output_index = int.from_bytes(
-            bytes.fromhex(output_id[66:]), 'little')
+            bytes.fromhex(output_id[74:]), 'little')
         return obj
 
     def __repr__(self):
diff --git a/bindings/python/iota_sdk/types/output_metadata.py b/bindings/python/iota_sdk/types/output_metadata.py
index 5be99566d5..947d844281 100644
--- a/bindings/python/iota_sdk/types/output_metadata.py
+++ b/bindings/python/iota_sdk/types/output_metadata.py
@@ -5,9 +5,12 @@
 from typing import Dict, Optional, Union
 from dataclasses import dataclass, field
 from dataclasses_json import config
-from iota_sdk.types.common import HexStr, SlotIndex, json
+from iota_sdk.types.block.id import BlockId
+from iota_sdk.types.common import SlotIndex, json
 from iota_sdk.types.output import AccountOutput, BasicOutput, DelegationOutput, FoundryOutput, NftOutput, deserialize_output
 from iota_sdk.types.output_id import OutputId
+from iota_sdk.types.slot import SlotCommitmentId
+from iota_sdk.types.transaction_id import TransactionId
 
 
 @json
@@ -23,9 +26,9 @@ class OutputMetadata:
         spent: Metadata of the output if it is marked as spent in the ledger.
     """
     output_id: OutputId
-    block_id: HexStr
+    block_id: BlockId
     included: OutputInclusionMetadata
-    latest_commitment_id: HexStr
+    latest_commitment_id: SlotCommitmentId
     spent: Optional[OutputConsumptionMetadata] = None
 
 
@@ -77,8 +80,8 @@ class OutputInclusionMetadata:
         commitment_id: Commitment ID that includes the creation of the output.
     """
     slot: SlotIndex
-    transaction_id: HexStr
-    commitment_id: Optional[HexStr] = None
+    transaction_id: TransactionId
+    commitment_id: Optional[SlotCommitmentId] = None
 
 
 @json
@@ -92,5 +95,5 @@ class OutputConsumptionMetadata:
         commitment_id: Commitment ID that includes the spending of the output.
     """
     slot: SlotIndex
-    transaction_id: HexStr
-    commitment_id: Optional[HexStr] = None
+    transaction_id: TransactionId
+    commitment_id: Optional[SlotCommitmentId] = None
diff --git a/bindings/python/iota_sdk/types/slot.py b/bindings/python/iota_sdk/types/slot.py
new file mode 100644
index 0000000000..fa7389e691
--- /dev/null
+++ b/bindings/python/iota_sdk/types/slot.py
@@ -0,0 +1,9 @@
+# Copyright 2024 IOTA Stiftung
+# SPDX-License-Identifier: Apache-2.0
+
+from iota_sdk.types.common import IdWithSlotIndex
+
+
+class SlotCommitmentId(IdWithSlotIndex):
+    """Represents a slot commitment ID.
+    """
diff --git a/bindings/python/iota_sdk/types/transaction_id.py b/bindings/python/iota_sdk/types/transaction_id.py
new file mode 100644
index 0000000000..af4effc6da
--- /dev/null
+++ b/bindings/python/iota_sdk/types/transaction_id.py
@@ -0,0 +1,9 @@
+# Copyright 2024 IOTA Stiftung
+# SPDX-License-Identifier: Apache-2.0
+
+from iota_sdk.types.common import IdWithSlotIndex
+
+
+class TransactionId(IdWithSlotIndex):
+    """Represents a transaction ID.
+    """
diff --git a/bindings/python/iota_sdk/types/transaction_with_metadata.py b/bindings/python/iota_sdk/types/transaction_with_metadata.py
index 75de849163..a10fc62751 100644
--- a/bindings/python/iota_sdk/types/transaction_with_metadata.py
+++ b/bindings/python/iota_sdk/types/transaction_with_metadata.py
@@ -5,9 +5,11 @@
 from dataclasses import dataclass
 from typing import List, Optional
 from enum import Enum
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.common import HexStr, json
 from iota_sdk.types.output_metadata import OutputWithMetadata
 from iota_sdk.types.payload import SignedTransactionPayload
+from iota_sdk.types.transaction_id import TransactionId
 
 
 class InclusionState(str, Enum):
@@ -44,12 +46,12 @@ class TransactionWithMetadata:
     payload: SignedTransactionPayload
     inclusion_state: InclusionState
     timestamp: int
-    transaction_id: HexStr
+    transaction_id: TransactionId
     network_id: int
     incoming: bool
     inputs = List[OutputWithMetadata]
     note: Optional[str] = None
-    block_id: Optional[HexStr] = None
+    block_id: Optional[BlockId] = None
 
 
 @json
diff --git a/bindings/python/iota_sdk/types/utxo_changes.py b/bindings/python/iota_sdk/types/utxo_changes.py
index 628f479449..71fea39610 100644
--- a/bindings/python/iota_sdk/types/utxo_changes.py
+++ b/bindings/python/iota_sdk/types/utxo_changes.py
@@ -2,9 +2,9 @@
 # SPDX-License-Identifier: Apache-2.0
 
 from typing import List
-
 from dataclasses import dataclass
-from iota_sdk.types.common import HexStr, json
+from iota_sdk.types.common import json
+from iota_sdk.types.output_id import OutputId
 
 
 @json
@@ -14,5 +14,5 @@ class UtxoChanges():
     Returns all UTXO changes that happened at a specific milestone.
     """
     index: int
-    created_outputs: List[HexStr]
-    consumed_outputs: List[HexStr]
+    created_outputs: List[OutputId]
+    consumed_outputs: List[OutputId]
diff --git a/bindings/python/iota_sdk/utils.py b/bindings/python/iota_sdk/utils.py
index b61f6186fd..ff22fcc128 100644
--- a/bindings/python/iota_sdk/utils.py
+++ b/bindings/python/iota_sdk/utils.py
@@ -6,6 +6,7 @@
 from typing import TYPE_CHECKING, List, Optional
 from iota_sdk.common import custom_encoder
 
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.signature import Ed25519Signature
 from iota_sdk.types.address import Address, deserialize_address
 from iota_sdk.types.common import HexStr
@@ -16,6 +17,7 @@
 from iota_sdk.types.output_id import OutputId
 from iota_sdk.types.unlock import Unlock
 from iota_sdk.types.transaction_data import InputSigningData
+from iota_sdk.types.transaction_id import TransactionId
 from iota_sdk.external import call_utils_method
 
 # Required to prevent circular import
@@ -145,7 +147,7 @@ def compute_nft_id(output_id: OutputId) -> HexStr:
         })
 
     @staticmethod
-    def compute_output_id(transaction_id: HexStr, index: int) -> OutputId:
+    def compute_output_id(transaction_id: TransactionId, index: int) -> OutputId:
         """Compute the output id from transaction id and output index.
         """
         return OutputId.from_string(_call_method('computeOutputId', {
@@ -165,21 +167,21 @@ def compute_token_id(account_id: HexStr, serial_number: int,
         })
 
     @staticmethod
-    def block_id(block: Block, params: ProtocolParameters) -> HexStr:
+    def block_id(block: Block, params: ProtocolParameters) -> BlockId:
         """ Return a block ID (Blake2b256 hash of block bytes) from a block.
         """
-        return _call_method('blockId', {
+        return BlockId(_call_method('blockId', {
             'block': block,
             'protocolParameters': params,
-        })
+        }))
 
     @staticmethod
-    def transaction_id(payload: SignedTransactionPayload) -> HexStr:
+    def transaction_id(payload: SignedTransactionPayload) -> TransactionId:
         """ Compute the transaction ID (Blake2b256 hash of the provided transaction payload) of a transaction payload.
         """
-        return _call_method('transactionId', {
+        return TransactionId(_call_method('transactionId', {
             'payload': payload
-        })
+        }))
 
     @staticmethod
     def protocol_parameters_hash(params: ProtocolParameters) -> HexStr:
diff --git a/bindings/python/iota_sdk/wallet/wallet.py b/bindings/python/iota_sdk/wallet/wallet.py
index 4644570568..33788554ee 100644
--- a/bindings/python/iota_sdk/wallet/wallet.py
+++ b/bindings/python/iota_sdk/wallet/wallet.py
@@ -11,6 +11,7 @@
 from iota_sdk.wallet.prepared_transaction import PreparedCreateDelegationTransaction, PreparedCreateDelegationTransactionData, PreparedCreateTokenTransactionData, PreparedTransaction, PreparedCreateTokenTransaction
 from iota_sdk.wallet.sync_options import SyncOptions
 from iota_sdk.types.balance import Balance
+from iota_sdk.types.block.id import BlockId
 from iota_sdk.types.burn import Burn
 from iota_sdk.types.common import HexStr, json
 from iota_sdk.types.client_options import ClientOptions
@@ -21,6 +22,7 @@
 from iota_sdk.types.output import BasicOutput, NftOutput, Output, deserialize_output
 from iota_sdk.types.output_params import OutputParams
 from iota_sdk.types.transaction_data import PreparedTransactionData, SignedTransactionData
+from iota_sdk.types.transaction_id import TransactionId
 from iota_sdk.types.send_params import BeginStakingParams, CreateAccountOutputParams, CreateDelegationParams, CreateNativeTokenParams, MintNftParams, SendNativeTokenParams, SendNftParams, SendParams
 from iota_sdk.types.signature import Bip44
 from iota_sdk.types.transaction_with_metadata import CreateDelegationTransaction, CreateNativeTokenTransaction, TransactionWithMetadata
@@ -424,7 +426,7 @@ def claimable_outputs(self, outputs_to_claim: List[OutputId]):
         )
 
     def get_transaction(
-            self, transaction_id: HexStr) -> TransactionWithMetadata:
+            self, transaction_id: TransactionId) -> TransactionWithMetadata:
         """Get transaction.
         """
         return TransactionWithMetadata.from_dict(self._call_method(
@@ -688,14 +690,14 @@ def prepare_end_staking(self, account_id: HexStr) -> PreparedTransaction:
         ))
         return PreparedTransaction(self, prepared)
 
-    def announce_candidacy(self, account_id: HexStr) -> HexStr:
+    def announce_candidacy(self, account_id: HexStr) -> BlockId:
         """Announce a staking account's candidacy for the staking period.
         """
-        self._call_method(
+        return BlockId(self._call_method(
             'announceCandidacy', {
                 'accountId': account_id,
             }
-        )
+        ))
 
     def send_transaction(
             self, outputs: List[Output], options: Optional[TransactionOptions] = None) -> TransactionWithMetadata:
@@ -716,17 +718,17 @@ def prepare_transaction(
         return PreparedTransaction(self, prepared)
 
     def reissue_transaction_until_included(
-            self, transaction_id: HexStr, interval=None, max_attempts=None) -> HexStr:
+            self, transaction_id: TransactionId, interval=None, max_attempts=None) -> BlockId:
         """Reissues a transaction sent from the wallet for a provided transaction id until it's
         included (referenced by a milestone). Returns the included block id.
         """
-        return self._call_method(
+        return BlockId(self._call_method(
             'reissueTransactionUntilIncluded', {
                 'transactionId': transaction_id,
                 'interval': interval,
                 'maxAttempts': max_attempts
             }
-        )
+        ))
 
     def send(self, amount: int, address: str,
              options: Optional[TransactionOptions] = None) -> TransactionWithMetadata:
diff --git a/bindings/python/tests/test_offline.py b/bindings/python/tests/test_offline.py
index 8a4a892a8c..536ee757da 100644
--- a/bindings/python/tests/test_offline.py
+++ b/bindings/python/tests/test_offline.py
@@ -3,7 +3,7 @@
 
 import json
 import unittest
-from iota_sdk import Client, MnemonicSecretManager, Utils, SecretManager, OutputId, hex_to_utf8, utf8_to_hex, Bip44, CoinType, Irc27Metadata, Irc30Metadata
+from iota_sdk import Client, MnemonicSecretManager, Utils, SecretManager, OutputId, hex_to_utf8, utf8_to_hex, Bip44, CoinType, Irc27Metadata, Irc30Metadata, TransactionId
 
 
 # Read the test vector
@@ -57,35 +57,36 @@ def test_sign_verify_ed25519():
 
 class TestTypes(unittest.TestCase):
     def test_output_id(self):
-        transaction_id = '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649'
+        transaction_id = TransactionId(
+            '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c64900000000')
         output_index = 42
         output_id = OutputId(transaction_id, output_index)
         assert repr(
-            output_id) == '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a000000'
+            output_id) == '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649000000002a00'
 
         new_output_id = OutputId.from_string(
-            '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a0000000000')
+            '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649000000002a00')
         assert repr(
-            new_output_id) == '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a0000000000'
+            new_output_id) == '0x52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649000000002a00'
         assert new_output_id.transaction_id == transaction_id
         assert new_output_id.output_index == output_index
 
-        transaction_id_missing_0x_prefix = '52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649'
+        transaction_id_missing_0x_prefix = '52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c64900000000'
         with self.assertRaises(ValueError):
             OutputId(transaction_id_missing_0x_prefix, output_index)
-        transaction_id__invalid_hex_prefix = '0052fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649'
+        transaction_id__invalid_hex_prefix = '0052fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c64900000000'
         with self.assertRaises(ValueError):
             OutputId(transaction_id__invalid_hex_prefix, output_index)
-        transaction_id_invalid_hex_char = '0xz2fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c649'
+        transaction_id_invalid_hex_char = '0xz2fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c64900000000'
         with self.assertRaises(ValueError):
             OutputId(transaction_id_invalid_hex_char, output_index)
-        output_id_missing_0x_prefix = '52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a00000000'
+        output_id_missing_0x_prefix = '52fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a000000000000'
         with self.assertRaises(ValueError):
             OutputId.from_string(output_id_missing_0x_prefix)
-        output_id_invalid_hex_char = '0xz2fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a00000000'
+        output_id_invalid_hex_char = '0xz2fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a000000000000'
         with self.assertRaises(ValueError):
             OutputId.from_string(output_id_invalid_hex_char)
-        output_id_invalid_hex_prefix = '0052fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a00000000'
+        output_id_invalid_hex_prefix = '0052fdfc072182654f163f5f0f9a621d729566c74d10037c4d7bbb0407d1e2c6492a000000000000'
         with self.assertRaises(ValueError):
             OutputId.from_string(output_id_invalid_hex_prefix)