diff --git a/onchain/rollups/contracts/portals/IPortal.sol b/onchain/rollups/contracts/portals/IPortal.sol
deleted file mode 100644
index 65614fbe..00000000
--- a/onchain/rollups/contracts/portals/IPortal.sol
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright Cartesi Pte. Ltd.
-
-// SPDX-License-Identifier: Apache-2.0
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-// this file except in compliance with the License. You may obtain a copy of the
-// License at http://www.apache.org/licenses/LICENSE-2.0
-
-// Unless required by applicable law or agreed to in writing, software distributed
-// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-// CONDITIONS OF ANY KIND, either express or implied. See the License for the
-// specific language governing permissions and limitations under the License.
-
-pragma solidity ^0.8.8;
-
-import {IInputBox} from "../inputs/IInputBox.sol";
-
-/// @title Portal interface
-interface IPortal {
-    // Permissionless functions
-
-    /// @notice Get the input box used by this portal.
-    /// @return The input box
-    function getInputBox() external view returns (IInputBox);
-}
diff --git a/onchain/rollups/contracts/portals/Portal.sol b/onchain/rollups/contracts/portals/Portal.sol
deleted file mode 100644
index d214b399..00000000
--- a/onchain/rollups/contracts/portals/Portal.sol
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright Cartesi Pte. Ltd.
-
-// SPDX-License-Identifier: Apache-2.0
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-// this file except in compliance with the License. You may obtain a copy of the
-// License at http://www.apache.org/licenses/LICENSE-2.0
-
-// Unless required by applicable law or agreed to in writing, software distributed
-// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-// CONDITIONS OF ANY KIND, either express or implied. See the License for the
-// specific language governing permissions and limitations under the License.
-
-pragma solidity ^0.8.8;
-
-import {IPortal} from "./IPortal.sol";
-import {IInputBox} from "../inputs/IInputBox.sol";
-
-/// @title Portal
-/// @notice This contract serves as a base for all the other portals.
-contract Portal is IPortal {
-    /// @notice The input box used by the portal.
-    IInputBox internal immutable inputBox;
-
-    /// @notice Constructs the portal.
-    /// @param _inputBox The input box used by the portal
-    constructor(IInputBox _inputBox) {
-        inputBox = _inputBox;
-    }
-
-    function getInputBox() external view override returns (IInputBox) {
-        return inputBox;
-    }
-}
diff --git a/onchain/rollups/contracts/relays/IRelay.sol b/onchain/rollups/contracts/relays/IRelay.sol
deleted file mode 100644
index 88808fb2..00000000
--- a/onchain/rollups/contracts/relays/IRelay.sol
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright Cartesi Pte. Ltd.
-
-// SPDX-License-Identifier: Apache-2.0
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-// this file except in compliance with the License. You may obtain a copy of the
-// License at http://www.apache.org/licenses/LICENSE-2.0
-
-// Unless required by applicable law or agreed to in writing, software distributed
-// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-// CONDITIONS OF ANY KIND, either express or implied. See the License for the
-// specific language governing permissions and limitations under the License.
-
-pragma solidity ^0.8.8;
-
-import {IInputBox} from "../inputs/IInputBox.sol";
-
-/// @title Relay interface
-interface IRelay {
-    // Permissionless functions
-
-    /// @notice Get the input box used by this relay.
-    /// @return The input box
-    function getInputBox() external view returns (IInputBox);
-}
diff --git a/onchain/rollups/contracts/relays/Relay.sol b/onchain/rollups/contracts/relays/Relay.sol
deleted file mode 100644
index 7129b309..00000000
--- a/onchain/rollups/contracts/relays/Relay.sol
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright Cartesi Pte. Ltd.
-
-// SPDX-License-Identifier: Apache-2.0
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-// this file except in compliance with the License. You may obtain a copy of the
-// License at http://www.apache.org/licenses/LICENSE-2.0
-
-// Unless required by applicable law or agreed to in writing, software distributed
-// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-// CONDITIONS OF ANY KIND, either express or implied. See the License for the
-// specific language governing permissions and limitations under the License.
-
-pragma solidity ^0.8.8;
-
-import {IRelay} from "./IRelay.sol";
-import {IInputBox} from "../inputs/IInputBox.sol";
-
-/// @title Relay
-/// @notice This contract serves as a base for all the other relays.
-contract Relay is IRelay {
-    /// @notice The input box used by the relay.
-    IInputBox internal immutable inputBox;
-
-    /// @notice Constructs the relay.
-    /// @param _inputBox The input box used by the relay
-    constructor(IInputBox _inputBox) {
-        inputBox = _inputBox;
-    }
-
-    function getInputBox() external view override returns (IInputBox) {
-        return inputBox;
-    }
-}