Implement adapter and test templates

evm/src/template/TemplateSwapAdapter.sol

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+pragma experimental ABIEncoderV2;
+pragma solidity ^0.8.13;
+
+import {IERC20, ISwapAdapter} from "src/interfaces/ISwapAdapter.sol";
+
+/// @title TemplateSwapAdapter
+/// @dev This is a template for a swap adapter.
+/// Rename it to your own protocol's name and implement it according to the
+/// specification.
+contract TemplateSwapAdapter is ISwapAdapter {
+    function price(
+        bytes32 _poolId,
+        IERC20 _sellToken,
+        IERC20 _buyToken,
+        uint256[] memory _specifiedAmounts
+    ) external view override returns (Fraction[] memory _prices) {
+        revert NotImplemented("TemplateSwapAdapter.price");
+    }
+
+    function swap(
+        bytes32 poolId,
+        IERC20 sellToken,
+        IERC20 buyToken,
+        OrderSide side,
+        uint256 specifiedAmount
+    ) external returns (Trade memory trade) {
+        revert NotImplemented("TemplateSwapAdapter.swap");
+    }
+
+    function getLimits(bytes32 poolId, IERC20 sellToken, IERC20 buyToken)
+        external
+        returns (uint256[] memory limits)
+    {
+        revert NotImplemented("TemplateSwapAdapter.getLimits");
+    }
+
+    function getCapabilities(bytes32 poolId, IERC20 sellToken, IERC20 buyToken)
+        external
+        returns (Capability[] memory capabilities)
+    {
+        revert NotImplemented("TemplateSwapAdapter.getCapabilities");
+    }
+
+    function getTokens(bytes32 poolId)
+        external
+        returns (IERC20[] memory tokens)
+    {
+        revert NotImplemented("TemplateSwapAdapter.getTokens");
+    }
+
+    function getPoolIds(uint256 offset, uint256 limit)
+        external
+        returns (bytes32[] memory ids)
+    {
+        revert NotImplemented("TemplateSwapAdapter.getPoolIds");
+    }
+}