Refactor and add Balancer V2 stub

evm/src/balancer-v2/BalancerV2SwapAdapter.sol

@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+pragma solidity ^0.8.13;
+
+import {IERC20, ISwapAdapter} from "interfaces/ISwapAdapter.sol";
+
+contract BalancerV2SwapAdapter is ISwapAdapter {
+
+    constructor() {
+    }
+
+    function getPairReserves(
+        bytes32 pairId,
+        IERC20 sellToken,
+        IERC20 buyToken
+    ) internal view returns (uint112 r0, uint112 r1) {
+        revert NotImplemented("BalancerV2SwapAdapter.getPairReserves");
+    }
+
+    function price(
+        bytes32 pairId,
+        IERC20 sellToken,
+        IERC20 buyToken,
+        uint256[] memory sellAmounts
+    ) external view override returns (Fraction[] memory prices) {
+        revert NotImplemented("BalancerV2SwapAdapter.price");
+    }
+
+    function getPriceAt(uint256 amountIn, uint256 reserveIn, uint256 reserveOut)
+        internal
+        pure
+        returns (Fraction memory)
+    {
+        revert NotImplemented("BalancerV2SwapAdapter.getPriceAt");
+    }
+
+    function swap(
+        bytes32 pairId,
+        IERC20 sellToken,
+        IERC20 buyToken,
+        SwapSide side,
+        uint256 specifiedAmount
+    ) external override returns (Trade memory trade) {
+        revert NotImplemented("BalancerV2SwapAdapter.swap");
+    }
+
+    function getLimits(bytes32 pairId, SwapSide side)
+        external
+        view
+        override
+        returns (uint256[] memory limits)
+    {
+        revert NotImplemented("BalancerV2SwapAdapter.getLimits");
+    }
+
+    function getCapabilities(bytes32, IERC20, IERC20)
+        external
+        pure
+        override
+        returns (Capability[] memory capabilities)
+    {
+        capabilities = new Capability[](3);
+        capabilities[0] = Capability.SellSide;
+        capabilities[1] = Capability.BuySide;
+        capabilities[2] = Capability.PriceFunction;
+    }
+
+    function getTokens(bytes32 pairId)
+        external
+        view
+        override
+        returns (IERC20[] memory tokens)
+    {
+        revert NotImplemented("BalancerV2SwapAdapter.getTokens");
+    }
+
+    function getPoolIds(uint256 offset, uint256 limit)
+        external
+        view
+        override
+        returns (bytes32[] memory ids)
+    {
+        revert NotImplemented("BalancerV2SwapAdapter.getPoolIds");
+    }
+}

evm/src/balancer-v2/manifest.yaml

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+# information about the author helps us reach out in case of issues.
+author:
+  name: Propellerheads.xyz
+  email: pistomat@propellerheads.xyz
+
+# Protocol Constants
+constants:
+  protocol_gas: 30000
+  # minimum capabilities we can expect, individual pools may extend these
+  capabilities:
+    - SellSide
+    - BuySide
+    - PriceFunction
+
+# The file containing the adapter contract
+contract: BalancerV2SwapAdapter.sol
+
+# Deployment instances used to generate chain specific bytecode.
+instances:
+  - chain:
+      name: mainnet
+      id: 0
+    arguments:
+      - "0xBA12222222228d8Ba445958a75a0704d566BF2C8"
+
+# Specify some automatic test cases in case getPoolIds and
+# getTokens are not implemented.
+tests:
+  instances:
+    - pair_id: "0xB4e16d0168e52d35CaCD2c6185b44281Ec28C9Dc"
+      sell_token: "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"
+      buy_token: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
+      block: 17000000
+      chain:
+        id: 0
+        name: mainnet