me-foundation
diff --git a/‎contracts/nft/erc1155m/clones/ERC1155ConduitPreapprovedCloneable.sol
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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.22;
+
+import {ERC1155} from "solady/src/tokens/ERC1155.sol";
+
+/// @title ERC1155ConduitPreapprovedCloneable
+/// @notice ERC1155 token with the MagicEden conduit preapproved for seamless transactions.
+abstract contract ERC1155ConduitPreapprovedCloneable is ERC1155 {
+    /// @dev The canonical MagicEden conduit address.
+    address internal constant _CONDUIT = 0x2052f8A2Ff46283B30084e5d84c89A2fdBE7f74b;
+
+    /// @notice Safely transfers `amount` tokens of type `id` from `from` to `to`.
+    /// @param from The address holding the tokens.
+    /// @param to The address to transfer the tokens to.
+    /// @param id The token type identifier.
+    /// @param amount The number of tokens to transfer.
+    /// @param data Additional data with no specified format.
+    function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data)
+        public
+        virtual
+        override
+    {
+        _safeTransfer(_by(), from, to, id, amount, data);
+    }
+
+    /// @notice Safely transfers a batch of tokens from `from` to `to`.
+    /// @param from The address holding the tokens.
+    /// @param to The address to transfer the tokens to.
+    /// @param ids An array of token type identifiers.
+    /// @param amounts An array of amounts to transfer for each token type.
+    /// @param data Additional data with no specified format.
+    function safeBatchTransferFrom(
+        address from,
+        address to,
+        uint256[] calldata ids,
+        uint256[] calldata amounts,
+        bytes calldata data
+    ) public virtual override {
+        _safeBatchTransfer(_by(), from, to, ids, amounts, data);
+    }
+
+    /// @notice Checks if `operator` is approved to manage all of `owner`'s tokens.
+    /// @param owner The address owning the tokens.
+    /// @param operator The address to query for approval.
+    /// @return True if `operator` is approved, otherwise false.
+    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
+        if (operator == _CONDUIT) return true;
+        return ERC1155.isApprovedForAll(owner, operator);
+    }
+
+    /// @dev Determines the address initiating the transfer.
+    /// If the caller is the predefined conduit, returns address(0), else returns the caller's address.
+    /// @return result The address initiating the transfer.
+    function _by() internal view virtual returns (address result) {
+        assembly {
+            // `msg.sender == _CONDUIT ? address(0) : msg.sender`.
+            result := mul(iszero(eq(caller(), _CONDUIT)), caller())
+        }
+    }
+}