diff --git a/contracts/interfaces/external/IBVault.sol b/contracts/interfaces/external/IBVault.sol
new file mode 100644
index 000000000..111f3c068
--- /dev/null
+++ b/contracts/interfaces/external/IBVault.sol
@@ -0,0 +1,30 @@
+pragma solidity 0.6.10;
+pragma experimental ABIEncoderV2;
+
+interface IBVault {
+    
+    enum SwapKind { GIVEN_IN, GIVEN_OUT }
+
+    function swap(
+        SingleSwap memory singleSwap,
+        FundManagement memory funds,
+        uint256 limit,
+        uint256 deadline
+    ) external payable returns (uint256);
+
+    struct SingleSwap {
+        bytes32 poolId;
+        SwapKind kind;
+        address assetIn;
+        address assetOut;
+        uint256 amount;
+        bytes userData;
+    }
+
+    struct FundManagement {
+        address sender;
+        bool fromInternalBalance;
+        address payable recipient;
+        bool toInternalBalance;
+    }
+}
\ No newline at end of file
diff --git a/contracts/protocol/integration/index-exchange/BalancerV2IndexExchangeAdapter.sol b/contracts/protocol/integration/index-exchange/BalancerV2IndexExchangeAdapter.sol
new file mode 100644
index 000000000..12e37707b
--- /dev/null
+++ b/contracts/protocol/integration/index-exchange/BalancerV2IndexExchangeAdapter.sol
@@ -0,0 +1,134 @@
+/*
+    Copyright 2021 Set Labs Inc.
+
+    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.
+
+    SPDX-License-Identifier: Apache License, Version 2.0
+*/
+
+pragma solidity 0.6.10;
+pragma experimental "ABIEncoderV2";
+
+import { IBVault } from "../../../interfaces/external/IBVault.sol";
+import { IIndexExchangeAdapter } from "../../../interfaces/IIndexExchangeAdapter.sol";
+
+import { console } from "hardhat/console.sol";
+
+/**
+ * @title BalancerV2IndexExchangeAdapter
+ * @author Set Protocol
+ *
+ * A Balancer V2 exchange adapter that returns calldata for trading with GeneralIndexModule, allows trading a fixed input amount or for a fixed
+ * output amount.
+ */
+contract BalancerV2IndexExchangeAdapter is IIndexExchangeAdapter {
+    
+    /* ============ State Variables ============ */
+    
+    // Address of Balancer V2 vault contract
+    address public immutable vault;
+
+    /* ============ Constructor ============ */
+
+    /**
+     * Set state variables
+     *
+     * @param _vault        balancer vault address
+     */
+    constructor(address _vault) public {
+        vault = _vault;
+    }
+
+    /* ============ External Getter Functions ============ */
+
+    /**
+     * Return calldata for Balancer Vault, _isSendTokenFixed indicates whether a fixed amount of token should be sold for an unfixed amount, or
+     * if an unfixed amount of token should be spent for a fixed amount.
+     *
+     * Note: When _isSendTokenFixed is false, _sourceQuantity is defined as the max token quantity you are willing to trade, and
+     * _destinationQuantity is the exact quantity of token you are receiving.
+     *
+     * @param  _sourceToken              Address of source token to be sold
+     * @param  _destinationToken         Address of destination token to buy
+     * @param  _isSendTokenFixed         Boolean indicating if the send quantity is fixed, used to determine correct trade interface
+     * @param  _sourceQuantity           Fixed/Max amount of source token to sell
+     * @param  _destinationQuantity      Min/Fixed amount of destination tokens to receive
+     *
+     * @return address                   Target contract address
+     * @return uint256                   Call value
+     * @return bytes                     Trade calldata
+     */
+    function getTradeCalldata(
+        address _sourceToken,
+        address _destinationToken,
+        address _destinationAddress,
+        bool _isSendTokenFixed,
+        uint256 _sourceQuantity,
+        uint256 _destinationQuantity,
+        bytes memory _data
+    )
+        external
+        view
+        override
+        returns (address, uint256, bytes memory)
+    {
+        bytes32 poolId = abi.decode(_data, (bytes32));
+
+        console.logBytes32(poolId);
+        console.log(_destinationAddress);
+        console.log(_sourceQuantity);
+
+        IBVault.SingleSwap memory singleSwap = IBVault.SingleSwap({
+            poolId: poolId,
+            kind: _isSendTokenFixed ? IBVault.SwapKind.GIVEN_IN : IBVault.SwapKind.GIVEN_OUT,
+            assetIn: _sourceToken,
+            assetOut: _destinationToken,
+            amount: _isSendTokenFixed ? _sourceQuantity : _destinationQuantity,
+            userData: ""
+        });
+
+        console.log("a");
+
+        IBVault.FundManagement memory funds = IBVault.FundManagement({
+            sender: _destinationAddress,
+            fromInternalBalance: false,
+            recipient: payable(_destinationAddress),
+            toInternalBalance: false
+        });
+
+        console.log("b");
+        
+        bytes memory callData = abi.encodePacked(
+            IBVault.swap.selector,
+            abi.encode(
+                singleSwap,
+                funds,
+                _isSendTokenFixed ? _destinationQuantity : _sourceQuantity,
+                uint256(-1)
+            )
+        );
+
+        console.log("c");
+
+        return (vault, 0, callData);
+    }
+
+    /**
+     * Returns the address to approve source tokens to for trading. This is the Balancer V2 Vault address
+     *
+     * @return address             Address of the contract to approve tokens to
+     */
+    function getSpender() external view override returns (address) {
+        return vault;
+    }
+} 
\ No newline at end of file
diff --git a/external/abi/balancer/BFactory.json b/external/abi/balancer/v1/BFactory.json
similarity index 100%
rename from external/abi/balancer/BFactory.json
rename to external/abi/balancer/v1/BFactory.json
diff --git a/external/abi/balancer/BPool.json b/external/abi/balancer/v1/BPool.json
similarity index 100%
rename from external/abi/balancer/BPool.json
rename to external/abi/balancer/v1/BPool.json
diff --git a/external/abi/balancer/BRegistry.json b/external/abi/balancer/v1/BRegistry.json
similarity index 100%
rename from external/abi/balancer/BRegistry.json
rename to external/abi/balancer/v1/BRegistry.json
diff --git a/external/abi/balancer/ExchangeProxy.json b/external/abi/balancer/v1/ExchangeProxy.json
similarity index 100%
rename from external/abi/balancer/ExchangeProxy.json
rename to external/abi/balancer/v1/ExchangeProxy.json
diff --git a/external/abi/balancer/v2/BPoolV2.json b/external/abi/balancer/v2/BPoolV2.json
new file mode 100644
index 000000000..f622a68ee
--- /dev/null
+++ b/external/abi/balancer/v2/BPoolV2.json
@@ -0,0 +1,9 @@
+{
+  "contractName": "BPoolV2",
+  "abi":[{"inputs":[{"internalType":"contract IVault","name":"vault","type":"address"},{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"normalizedWeights","type":"uint256[]"},{"internalType":"uint256","name":"swapFeePercentage","type":"uint256"},{"internalType":"uint256","name":"pauseWindowDuration","type":"uint256"},{"internalType":"uint256","name":"bufferPeriodDuration","type":"uint256"},{"internalType":"address","name":"owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"paused","type":"bool"}],"name":"PausedStateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"swapFeePercentage","type":"uint256"}],"name":"SwapFeePercentageChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"decreaseApproval","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"selector","type":"bytes4"}],"name":"getActionId","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAuthorizer","outputs":[{"internalType":"contract IAuthorizer","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getInvariant","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLastInvariant","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getNormalizedWeights","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPausedState","outputs":[{"internalType":"bool","name":"paused","type":"bool"},{"internalType":"uint256","name":"pauseWindowEndTime","type":"uint256"},{"internalType":"uint256","name":"bufferPeriodEndTime","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPoolId","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getSwapFeePercentage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVault","outputs":[{"internalType":"contract IVault","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"increaseApproval","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"poolId","type":"bytes32"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256[]","name":"balances","type":"uint256[]"},{"internalType":"uint256","name":"lastChangeBlock","type":"uint256"},{"internalType":"uint256","name":"protocolSwapFeePercentage","type":"uint256"},{"internalType":"bytes","name":"userData","type":"bytes"}],"name":"onExitPool","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"poolId","type":"bytes32"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256[]","name":"balances","type":"uint256[]"},{"internalType":"uint256","name":"lastChangeBlock","type":"uint256"},{"internalType":"uint256","name":"protocolSwapFeePercentage","type":"uint256"},{"internalType":"bytes","name":"userData","type":"bytes"}],"name":"onJoinPool","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"enum IVault.SwapKind","name":"kind","type":"uint8"},{"internalType":"contract IERC20","name":"tokenIn","type":"address"},{"internalType":"contract IERC20","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes32","name":"poolId","type":"bytes32"},{"internalType":"uint256","name":"lastChangeBlock","type":"uint256"},{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"bytes","name":"userData","type":"bytes"}],"internalType":"struct IPoolSwapStructs.SwapRequest","name":"request","type":"tuple"},{"internalType":"uint256","name":"balanceTokenIn","type":"uint256"},{"internalType":"uint256","name":"balanceTokenOut","type":"uint256"}],"name":"onSwap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"poolId","type":"bytes32"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256[]","name":"balances","type":"uint256[]"},{"internalType":"uint256","name":"lastChangeBlock","type":"uint256"},{"internalType":"uint256","name":"protocolSwapFeePercentage","type":"uint256"},{"internalType":"bytes","name":"userData","type":"bytes"}],"name":"queryExit","outputs":[{"internalType":"uint256","name":"bptIn","type":"uint256"},{"internalType":"uint256[]","name":"amountsOut","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"poolId","type":"bytes32"},{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256[]","name":"balances","type":"uint256[]"},{"internalType":"uint256","name":"lastChangeBlock","type":"uint256"},{"internalType":"uint256","name":"protocolSwapFeePercentage","type":"uint256"},{"internalType":"bytes","name":"userData","type":"bytes"}],"name":"queryJoin","outputs":[{"internalType":"uint256","name":"bptOut","type":"uint256"},{"internalType":"uint256[]","name":"amountsIn","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"paused","type":"bool"}],"name":"setPaused","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"swapFeePercentage","type":"uint256"}],"name":"setSwapFeePercentage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}],
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+  "deployedBytecode": "",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}
+	
\ No newline at end of file
diff --git a/external/abi/balancer/v2/BVault.json b/external/abi/balancer/v2/BVault.json
new file mode 100644
index 000000000..8cbaef130
--- /dev/null
+++ b/external/abi/balancer/v2/BVault.json
@@ -0,0 +1,8 @@
+{
+  "contractName": "BVault",
+  "abi": [{"inputs":[{"internalType":"contract IAuthorizer","name":"authorizer","type":"address"},{"internalType":"contract IWETH","name":"weth","type":"address"},{"internalType":"uint256","name":"pauseWindowDuration","type":"uint256"},{"internalType":"uint256","name":"bufferPeriodDuration","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"contract IAuthorizer","name":"newAuthorizer","type":"address"}],"name":"AuthorizerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"contract IERC20","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ExternalBalanceTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"contract IFlashLoanRecipient","name":"recipient","type":"address"},{"indexed":true,"internalType":"contract IERC20","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"feeAmount","type":"uint256"}],"name":"FlashLoan","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"contract IERC20","name":"token","type":"address"},{"indexed":false,"internalType":"int256","name":"delta","type":"int256"}],"name":"InternalBalanceChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"paused","type":"bool"}],"name":"PausedStateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"poolId","type":"bytes32"},{"indexed":true,"internalType":"address","name":"liquidityProvider","type":"address"},{"indexed":false,"internalType":"contract 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+  "deployedBytecode": "",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}
diff --git a/external/abi/balancer/v2/WeightedPoolFactory.json b/external/abi/balancer/v2/WeightedPoolFactory.json
new file mode 100644
index 000000000..df10f53b6
--- /dev/null
+++ b/external/abi/balancer/v2/WeightedPoolFactory.json
@@ -0,0 +1,8 @@
+{
+  "contractName": "BVault",
+  "abi": [{"inputs":[{"internalType":"contract IVault","name":"vault","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"pool","type":"address"}],"name":"PoolCreated","type":"event"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"weights","type":"uint256[]"},{"internalType":"uint256","name":"swapFeePercentage","type":"uint256"},{"internalType":"address","name":"owner","type":"address"}],"name":"create","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getPauseConfiguration","outputs":[{"internalType":"uint256","name":"pauseWindowDuration","type":"uint256"},{"internalType":"uint256","name":"bufferPeriodDuration","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVault","outputs":[{"internalType":"contract IVault","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pool","type":"address"}],"name":"isPoolFromFactory","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}],
+  "bytecode": 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+  "deployedBytecode": "",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}
diff --git a/external/contracts/balancer/BFactory.sol b/external/contracts/balancer/v1/BFactory.sol
similarity index 100%
rename from external/contracts/balancer/BFactory.sol
rename to external/contracts/balancer/v1/BFactory.sol
diff --git a/external/contracts/balancer/BPool.sol b/external/contracts/balancer/v1/BPool.sol
similarity index 100%
rename from external/contracts/balancer/BPool.sol
rename to external/contracts/balancer/v1/BPool.sol
diff --git a/external/contracts/balancer/BRegistry.sol b/external/contracts/balancer/v1/BRegistry.sol
similarity index 100%
rename from external/contracts/balancer/BRegistry.sol
rename to external/contracts/balancer/v1/BRegistry.sol
diff --git a/external/contracts/balancer/ExchangeProxy.sol b/external/contracts/balancer/v1/ExchangeProxy.sol
similarity index 100%
rename from external/contracts/balancer/ExchangeProxy.sol
rename to external/contracts/balancer/v1/ExchangeProxy.sol
diff --git a/external/contracts/balancer/v2/BPoolV2.sol b/external/contracts/balancer/v2/BPoolV2.sol
new file mode 100644
index 000000000..755ae4e52
--- /dev/null
+++ b/external/contracts/balancer/v2/BPoolV2.sol
@@ -0,0 +1,705 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+import "@balancer-labs/v2-solidity-utils/contracts/math/Math.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/math/FixedPoint.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/InputHelpers.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/TemporarilyPausable.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/helpers/WordCodec.sol";
+import "@balancer-labs/v2-solidity-utils/contracts/openzeppelin/ERC20.sol";
+
+import "@balancer-labs/v2-vault/contracts/interfaces/IVault.sol";
+import "@balancer-labs/v2-vault/contracts/interfaces/IBasePool.sol";
+
+import "@balancer-labs/v2-asset-manager-utils/contracts/IAssetManager.sol";
+
+import "./BalancerPoolToken.sol";
+import "./BasePoolAuthorization.sol";
+
+// solhint-disable max-states-count
+
+/**
+ * @dev Reference implementation for the base layer of a Pool contract that manages a single Pool with optional
+ * Asset Managers, an admin-controlled swap fee percentage, and an emergency pause mechanism.
+ *
+ * Note that neither swap fees nor the pause mechanism are used by this contract. They are passed through so that
+ * derived contracts can use them via the `_addSwapFeeAmount` and `_subtractSwapFeeAmount` functions, and the
+ * `whenNotPaused` modifier.
+ *
+ * No admin permissions are checked here: instead, this contract delegates that to the Vault's own Authorizer.
+ *
+ * Because this contract doesn't implement the swap hooks, derived contracts should generally inherit from
+ * BaseGeneralPool or BaseMinimalSwapInfoPool. Otherwise, subclasses must inherit from the corresponding interfaces
+ * and implement the swap callbacks themselves.
+ */
+abstract contract BasePool is IBasePool, BasePoolAuthorization, BalancerPoolToken, TemporarilyPausable {
+    using WordCodec for bytes32;
+    using FixedPoint for uint256;
+
+    uint256 private constant _MIN_TOKENS = 2;
+
+    uint256 private constant _MINIMUM_BPT = 1e6;
+
+    // 1e18 corresponds to 1.0, or a 100% fee
+    uint256 private constant _MIN_SWAP_FEE_PERCENTAGE = 1e12; // 0.0001%
+    uint256 private constant _MAX_SWAP_FEE_PERCENTAGE = 1e17; // 10% - this fits in 64 bits
+
+    // Storage slot that can be used to store unrelated pieces of information. In particular, by default is used
+    // to store only the swap fee percentage of a pool. But it can be extended to store some more pieces of information.
+    // The swap fee percentage is stored in the most-significant 64 bits, therefore the remaining 192 bits can be
+    // used to store any other piece of information.
+    bytes32 private _miscData;
+    uint256 private constant _SWAP_FEE_PERCENTAGE_OFFSET = 192;
+
+    IVault private immutable _vault;
+    bytes32 private immutable _poolId;
+
+    event SwapFeePercentageChanged(uint256 swapFeePercentage);
+
+    constructor(
+        IVault vault,
+        IVault.PoolSpecialization specialization,
+        string memory name,
+        string memory symbol,
+        IERC20[] memory tokens,
+        address[] memory assetManagers,
+        uint256 swapFeePercentage,
+        uint256 pauseWindowDuration,
+        uint256 bufferPeriodDuration,
+        address owner
+    )
+        // Base Pools are expected to be deployed using factories. By using the factory address as the action
+        // disambiguator, we make all Pools deployed by the same factory share action identifiers. This allows for
+        // simpler management of permissions (such as being able to manage granting the 'set fee percentage' action in
+        // any Pool created by the same factory), while still making action identifiers unique among different factories
+        // if the selectors match, preventing accidental errors.
+        Authentication(bytes32(uint256(msg.sender)))
+        BalancerPoolToken(name, symbol)
+        BasePoolAuthorization(owner)
+        TemporarilyPausable(pauseWindowDuration, bufferPeriodDuration)
+    {
+        _require(tokens.length >= _MIN_TOKENS, Errors.MIN_TOKENS);
+        _require(tokens.length <= _getMaxTokens(), Errors.MAX_TOKENS);
+
+        // The Vault only requires the token list to be ordered for the Two Token Pools specialization. However,
+        // to make the developer experience consistent, we are requiring this condition for all the native pools.
+        // Also, since these Pools will register tokens only once, we can ensure the Pool tokens will follow the same
+        // order. We rely on this property to make Pools simpler to write, as it lets us assume that the
+        // order of token-specific parameters (such as token weights) will not change.
+        InputHelpers.ensureArrayIsSorted(tokens);
+
+        _setSwapFeePercentage(swapFeePercentage);
+
+        bytes32 poolId = vault.registerPool(specialization);
+
+        vault.registerTokens(poolId, tokens, assetManagers);
+
+        // Set immutable state variables - these cannot be read from during construction
+        _vault = vault;
+        _poolId = poolId;
+    }
+
+    // Getters / Setters
+
+    function getVault() public view returns (IVault) {
+        return _vault;
+    }
+
+    function getPoolId() public view override returns (bytes32) {
+        return _poolId;
+    }
+
+    function _getTotalTokens() internal view virtual returns (uint256);
+
+    function _getMaxTokens() internal pure virtual returns (uint256);
+
+    function _getMinimumBpt() internal pure virtual returns (uint256) {
+        return _MINIMUM_BPT;
+    }
+
+    function getSwapFeePercentage() public view returns (uint256) {
+        return _miscData.decodeUint64(_SWAP_FEE_PERCENTAGE_OFFSET);
+    }
+
+    function setSwapFeePercentage(uint256 swapFeePercentage) external virtual authenticate whenNotPaused {
+        _setSwapFeePercentage(swapFeePercentage);
+    }
+
+    function _setSwapFeePercentage(uint256 swapFeePercentage) private {
+        _require(swapFeePercentage >= _MIN_SWAP_FEE_PERCENTAGE, Errors.MIN_SWAP_FEE_PERCENTAGE);
+        _require(swapFeePercentage <= _MAX_SWAP_FEE_PERCENTAGE, Errors.MAX_SWAP_FEE_PERCENTAGE);
+
+        _miscData = _miscData.insertUint64(swapFeePercentage, _SWAP_FEE_PERCENTAGE_OFFSET);
+        emit SwapFeePercentageChanged(swapFeePercentage);
+    }
+
+    function setAssetManagerPoolConfig(IERC20 token, bytes memory poolConfig)
+        public
+        virtual
+        authenticate
+        whenNotPaused
+    {
+        _setAssetManagerPoolConfig(token, poolConfig);
+    }
+
+    function _setAssetManagerPoolConfig(IERC20 token, bytes memory poolConfig) private {
+        bytes32 poolId = getPoolId();
+        (, , , address assetManager) = getVault().getPoolTokenInfo(poolId, token);
+
+        IAssetManager(assetManager).setConfig(poolId, poolConfig);
+    }
+
+    function setPaused(bool paused) external authenticate {
+        _setPaused(paused);
+    }
+
+    function _isOwnerOnlyAction(bytes32 actionId) internal view virtual override returns (bool) {
+        return
+            (actionId == getActionId(this.setSwapFeePercentage.selector)) ||
+            (actionId == getActionId(this.setAssetManagerPoolConfig.selector));
+    }
+
+    function _getMiscData() internal view returns (bytes32) {
+        return _miscData;
+    }
+
+    /**
+     * Inserts data into the least-significant 192 bits of the misc data storage slot.
+     * Note that the remaining 64 bits are used for the swap fee percentage and cannot be overloaded.
+     */
+    function _setMiscData(bytes32 newData) internal {
+        _miscData = _miscData.insertBits192(newData, 0);
+    }
+
+    // Join / Exit Hooks
+
+    modifier onlyVault(bytes32 poolId) {
+        _require(msg.sender == address(getVault()), Errors.CALLER_NOT_VAULT);
+        _require(poolId == getPoolId(), Errors.INVALID_POOL_ID);
+        _;
+    }
+
+    function onJoinPool(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        bytes memory userData
+    ) public virtual override onlyVault(poolId) returns (uint256[] memory, uint256[] memory) {
+        uint256[] memory scalingFactors = _scalingFactors();
+
+        if (totalSupply() == 0) {
+            (uint256 bptAmountOut, uint256[] memory amountsIn) = _onInitializePool(
+                poolId,
+                sender,
+                recipient,
+                scalingFactors,
+                userData
+            );
+
+            // On initialization, we lock _getMinimumBpt() by minting it for the zero address. This BPT acts as a
+            // minimum as it will never be burned, which reduces potential issues with rounding, and also prevents the
+            // Pool from ever being fully drained.
+            _require(bptAmountOut >= _getMinimumBpt(), Errors.MINIMUM_BPT);
+            _mintPoolTokens(address(0), _getMinimumBpt());
+            _mintPoolTokens(recipient, bptAmountOut - _getMinimumBpt());
+
+            // amountsIn are amounts entering the Pool, so we round up.
+            _downscaleUpArray(amountsIn, scalingFactors);
+
+            return (amountsIn, new uint256[](_getTotalTokens()));
+        } else {
+            _upscaleArray(balances, scalingFactors);
+            (uint256 bptAmountOut, uint256[] memory amountsIn, uint256[] memory dueProtocolFeeAmounts) = _onJoinPool(
+                poolId,
+                sender,
+                recipient,
+                balances,
+                lastChangeBlock,
+                protocolSwapFeePercentage,
+                scalingFactors,
+                userData
+            );
+
+            // Note we no longer use `balances` after calling `_onJoinPool`, which may mutate it.
+
+            _mintPoolTokens(recipient, bptAmountOut);
+
+            // amountsIn are amounts entering the Pool, so we round up.
+            _downscaleUpArray(amountsIn, scalingFactors);
+            // dueProtocolFeeAmounts are amounts exiting the Pool, so we round down.
+            _downscaleDownArray(dueProtocolFeeAmounts, scalingFactors);
+
+            return (amountsIn, dueProtocolFeeAmounts);
+        }
+    }
+
+    function onExitPool(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        bytes memory userData
+    ) public virtual override onlyVault(poolId) returns (uint256[] memory, uint256[] memory) {
+        uint256[] memory scalingFactors = _scalingFactors();
+        _upscaleArray(balances, scalingFactors);
+
+        (uint256 bptAmountIn, uint256[] memory amountsOut, uint256[] memory dueProtocolFeeAmounts) = _onExitPool(
+            poolId,
+            sender,
+            recipient,
+            balances,
+            lastChangeBlock,
+            protocolSwapFeePercentage,
+            scalingFactors,
+            userData
+        );
+
+        // Note we no longer use `balances` after calling `_onExitPool`, which may mutate it.
+
+        _burnPoolTokens(sender, bptAmountIn);
+
+        // Both amountsOut and dueProtocolFeeAmounts are amounts exiting the Pool, so we round down.
+        _downscaleDownArray(amountsOut, scalingFactors);
+        _downscaleDownArray(dueProtocolFeeAmounts, scalingFactors);
+
+        return (amountsOut, dueProtocolFeeAmounts);
+    }
+
+    // Query functions
+
+    /**
+     * @dev Returns the amount of BPT that would be granted to `recipient` if the `onJoinPool` hook were called by the
+     * Vault with the same arguments, along with the number of tokens `sender` would have to supply.
+     *
+     * This function is not meant to be called directly, but rather from a helper contract that fetches current Vault
+     * data, such as the protocol swap fee percentage and Pool balances.
+     *
+     * Like `IVault.queryBatchSwap`, this function is not view due to internal implementation details: the caller must
+     * explicitly use eth_call instead of eth_sendTransaction.
+     */
+    function queryJoin(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        bytes memory userData
+    ) external returns (uint256 bptOut, uint256[] memory amountsIn) {
+        InputHelpers.ensureInputLengthMatch(balances.length, _getTotalTokens());
+
+        _queryAction(
+            poolId,
+            sender,
+            recipient,
+            balances,
+            lastChangeBlock,
+            protocolSwapFeePercentage,
+            userData,
+            _onJoinPool,
+            _downscaleUpArray
+        );
+
+        // The `return` opcode is executed directly inside `_queryAction`, so execution never reaches this statement,
+        // and we don't need to return anything here - it just silences compiler warnings.
+        return (bptOut, amountsIn);
+    }
+
+    /**
+     * @dev Returns the amount of BPT that would be burned from `sender` if the `onExitPool` hook were called by the
+     * Vault with the same arguments, along with the number of tokens `recipient` would receive.
+     *
+     * This function is not meant to be called directly, but rather from a helper contract that fetches current Vault
+     * data, such as the protocol swap fee percentage and Pool balances.
+     *
+     * Like `IVault.queryBatchSwap`, this function is not view due to internal implementation details: the caller must
+     * explicitly use eth_call instead of eth_sendTransaction.
+     */
+    function queryExit(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        bytes memory userData
+    ) external returns (uint256 bptIn, uint256[] memory amountsOut) {
+        InputHelpers.ensureInputLengthMatch(balances.length, _getTotalTokens());
+
+        _queryAction(
+            poolId,
+            sender,
+            recipient,
+            balances,
+            lastChangeBlock,
+            protocolSwapFeePercentage,
+            userData,
+            _onExitPool,
+            _downscaleDownArray
+        );
+
+        // The `return` opcode is executed directly inside `_queryAction`, so execution never reaches this statement,
+        // and we don't need to return anything here - it just silences compiler warnings.
+        return (bptIn, amountsOut);
+    }
+
+    // Internal hooks to be overridden by derived contracts - all token amounts (except BPT) in these interfaces are
+    // upscaled.
+
+    /**
+     * @dev Called when the Pool is joined for the first time; that is, when the BPT total supply is zero.
+     *
+     * Returns the amount of BPT to mint, and the token amounts the Pool will receive in return.
+     *
+     * Minted BPT will be sent to `recipient`, except for _getMinimumBpt(), which will be deducted from this amount and
+     * sent to the zero address instead. This will cause that BPT to remain forever locked there, preventing total BTP
+     * from ever dropping below that value, and ensuring `_onInitializePool` can only be called once in the entire
+     * Pool's lifetime.
+     *
+     * The tokens granted to the Pool will be transferred from `sender`. These amounts are considered upscaled and will
+     * be downscaled (rounding up) before being returned to the Vault.
+     */
+    function _onInitializePool(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory scalingFactors,
+        bytes memory userData
+    ) internal virtual returns (uint256 bptAmountOut, uint256[] memory amountsIn);
+
+    /**
+     * @dev Called whenever the Pool is joined after the first initialization join (see `_onInitializePool`).
+     *
+     * Returns the amount of BPT to mint, the token amounts that the Pool will receive in return, and the number of
+     * tokens to pay in protocol swap fees.
+     *
+     * Implementations of this function might choose to mutate the `balances` array to save gas (e.g. when
+     * performing intermediate calculations, such as subtraction of due protocol fees). This can be done safely.
+     *
+     * Minted BPT will be sent to `recipient`.
+     *
+     * The tokens granted to the Pool will be transferred from `sender`. These amounts are considered upscaled and will
+     * be downscaled (rounding up) before being returned to the Vault.
+     *
+     * Due protocol swap fees will be taken from the Pool's balance in the Vault (see `IBasePool.onJoinPool`). These
+     * amounts are considered upscaled and will be downscaled (rounding down) before being returned to the Vault.
+     */
+    function _onJoinPool(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        uint256[] memory scalingFactors,
+        bytes memory userData
+    )
+        internal
+        virtual
+        returns (
+            uint256 bptAmountOut,
+            uint256[] memory amountsIn,
+            uint256[] memory dueProtocolFeeAmounts
+        );
+
+    /**
+     * @dev Called whenever the Pool is exited.
+     *
+     * Returns the amount of BPT to burn, the token amounts for each Pool token that the Pool will grant in return, and
+     * the number of tokens to pay in protocol swap fees.
+     *
+     * Implementations of this function might choose to mutate the `balances` array to save gas (e.g. when
+     * performing intermediate calculations, such as subtraction of due protocol fees). This can be done safely.
+     *
+     * BPT will be burnt from `sender`.
+     *
+     * The Pool will grant tokens to `recipient`. These amounts are considered upscaled and will be downscaled
+     * (rounding down) before being returned to the Vault.
+     *
+     * Due protocol swap fees will be taken from the Pool's balance in the Vault (see `IBasePool.onExitPool`). These
+     * amounts are considered upscaled and will be downscaled (rounding down) before being returned to the Vault.
+     */
+    function _onExitPool(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        uint256[] memory scalingFactors,
+        bytes memory userData
+    )
+        internal
+        virtual
+        returns (
+            uint256 bptAmountIn,
+            uint256[] memory amountsOut,
+            uint256[] memory dueProtocolFeeAmounts
+        );
+
+    // Internal functions
+
+    /**
+     * @dev Adds swap fee amount to `amount`, returning a higher value.
+     */
+    function _addSwapFeeAmount(uint256 amount) internal view returns (uint256) {
+        // This returns amount + fee amount, so we round up (favoring a higher fee amount).
+        return amount.divUp(FixedPoint.ONE.sub(getSwapFeePercentage()));
+    }
+
+    /**
+     * @dev Subtracts swap fee amount from `amount`, returning a lower value.
+     */
+    function _subtractSwapFeeAmount(uint256 amount) internal view returns (uint256) {
+        // This returns amount - fee amount, so we round up (favoring a higher fee amount).
+        uint256 feeAmount = amount.mulUp(getSwapFeePercentage());
+        return amount.sub(feeAmount);
+    }
+
+    // Scaling
+
+    /**
+     * @dev Returns a scaling factor that, when multiplied to a token amount for `token`, normalizes its balance as if
+     * it had 18 decimals.
+     */
+    function _computeScalingFactor(IERC20 token) internal view returns (uint256) {
+        // Tokens that don't implement the `decimals` method are not supported.
+        uint256 tokenDecimals = ERC20(address(token)).decimals();
+
+        // Tokens with more than 18 decimals are not supported.
+        uint256 decimalsDifference = Math.sub(18, tokenDecimals);
+        return FixedPoint.ONE * 10**decimalsDifference;
+    }
+
+    /**
+     * @dev Returns the scaling factor for one of the Pool's tokens. Reverts if `token` is not a token registered by the
+     * Pool.
+     *
+     * All scaling factors are fixed-point values with 18 decimals, to allow for this function to be overridden by
+     * derived contracts that need to apply further scaling, making these factors potentially non-integer.
+     *
+     * The largest 'base' scaling factor (i.e. in tokens with less than 18 decimals) is 10**18, which in fixed-point is
+     * 10**36. This value can be multiplied with a 112 bit Vault balance with no overflow by a factor of ~1e7, making
+     * even relatively 'large' factors safe to use.
+     *
+     * The 1e7 figure is the result of 2**256 / (1e18 * 1e18 * 2**112).
+     */
+    function _scalingFactor(IERC20 token) internal view virtual returns (uint256);
+
+    /**
+     * @dev Same as `_scalingFactor()`, except for all registered tokens (in the same order as registered). The Vault
+     * will always pass balances in this order when calling any of the Pool hooks.
+     */
+    function _scalingFactors() internal view virtual returns (uint256[] memory);
+
+    function getScalingFactors() external view returns (uint256[] memory) {
+        return _scalingFactors();
+    }
+
+    /**
+     * @dev Applies `scalingFactor` to `amount`, resulting in a larger or equal value depending on whether it needed
+     * scaling or not.
+     */
+    function _upscale(uint256 amount, uint256 scalingFactor) internal pure returns (uint256) {
+        // Upscale rounding wouldn't necessarily always go in the same direction: in a swap for example the balance of
+        // token in should be rounded up, and that of token out rounded down. This is the only place where we round in
+        // the same direction for all amounts, as the impact of this rounding is expected to be minimal (and there's no
+        // rounding error unless `_scalingFactor()` is overriden).
+        return FixedPoint.mulDown(amount, scalingFactor);
+    }
+
+    /**
+     * @dev Same as `_upscale`, but for an entire array. This function does not return anything, but instead *mutates*
+     * the `amounts` array.
+     */
+    function _upscaleArray(uint256[] memory amounts, uint256[] memory scalingFactors) internal view {
+        for (uint256 i = 0; i < _getTotalTokens(); ++i) {
+            amounts[i] = FixedPoint.mulDown(amounts[i], scalingFactors[i]);
+        }
+    }
+
+    /**
+     * @dev Reverses the `scalingFactor` applied to `amount`, resulting in a smaller or equal value depending on
+     * whether it needed scaling or not. The result is rounded down.
+     */
+    function _downscaleDown(uint256 amount, uint256 scalingFactor) internal pure returns (uint256) {
+        return FixedPoint.divDown(amount, scalingFactor);
+    }
+
+    /**
+     * @dev Same as `_downscaleDown`, but for an entire array. This function does not return anything, but instead
+     * *mutates* the `amounts` array.
+     */
+    function _downscaleDownArray(uint256[] memory amounts, uint256[] memory scalingFactors) internal view {
+        for (uint256 i = 0; i < _getTotalTokens(); ++i) {
+            amounts[i] = FixedPoint.divDown(amounts[i], scalingFactors[i]);
+        }
+    }
+
+    /**
+     * @dev Reverses the `scalingFactor` applied to `amount`, resulting in a smaller or equal value depending on
+     * whether it needed scaling or not. The result is rounded up.
+     */
+    function _downscaleUp(uint256 amount, uint256 scalingFactor) internal pure returns (uint256) {
+        return FixedPoint.divUp(amount, scalingFactor);
+    }
+
+    /**
+     * @dev Same as `_downscaleUp`, but for an entire array. This function does not return anything, but instead
+     * *mutates* the `amounts` array.
+     */
+    function _downscaleUpArray(uint256[] memory amounts, uint256[] memory scalingFactors) internal view {
+        for (uint256 i = 0; i < _getTotalTokens(); ++i) {
+            amounts[i] = FixedPoint.divUp(amounts[i], scalingFactors[i]);
+        }
+    }
+
+    function _getAuthorizer() internal view override returns (IAuthorizer) {
+        // Access control management is delegated to the Vault's Authorizer. This lets Balancer Governance manage which
+        // accounts can call permissioned functions: for example, to perform emergency pauses.
+        // If the owner is delegated, then *all* permissioned functions, including `setSwapFeePercentage`, will be under
+        // Governance control.
+        return getVault().getAuthorizer();
+    }
+
+    function _queryAction(
+        bytes32 poolId,
+        address sender,
+        address recipient,
+        uint256[] memory balances,
+        uint256 lastChangeBlock,
+        uint256 protocolSwapFeePercentage,
+        bytes memory userData,
+        function(bytes32, address, address, uint256[] memory, uint256, uint256, uint256[] memory, bytes memory)
+            internal
+            returns (uint256, uint256[] memory, uint256[] memory) _action,
+        function(uint256[] memory, uint256[] memory) internal view _downscaleArray
+    ) private {
+        // This uses the same technique used by the Vault in queryBatchSwap. Refer to that function for a detailed
+        // explanation.
+
+        if (msg.sender != address(this)) {
+            // We perform an external call to ourselves, forwarding the same calldata. In this call, the else clause of
+            // the preceding if statement will be executed instead.
+
+            // solhint-disable-next-line avoid-low-level-calls
+            (bool success, ) = address(this).call(msg.data);
+
+            // solhint-disable-next-line no-inline-assembly
+            assembly {
+                // This call should always revert to decode the bpt and token amounts from the revert reason
+                switch success
+                    case 0 {
+                        // Note we are manually writing the memory slot 0. We can safely overwrite whatever is
+                        // stored there as we take full control of the execution and then immediately return.
+
+                        // We copy the first 4 bytes to check if it matches with the expected signature, otherwise
+                        // there was another revert reason and we should forward it.
+                        returndatacopy(0, 0, 0x04)
+                        let error := and(mload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
+
+                        // If the first 4 bytes don't match with the expected signature, we forward the revert reason.
+                        if eq(eq(error, 0x43adbafb00000000000000000000000000000000000000000000000000000000), 0) {
+                            returndatacopy(0, 0, returndatasize())
+                            revert(0, returndatasize())
+                        }
+
+                        // The returndata contains the signature, followed by the raw memory representation of the
+                        // `bptAmount` and `tokenAmounts` (array: length + data). We need to return an ABI-encoded
+                        // representation of these.
+                        // An ABI-encoded response will include one additional field to indicate the starting offset of
+                        // the `tokenAmounts` array. The `bptAmount` will be laid out in the first word of the
+                        // returndata.
+                        //
+                        // In returndata:
+                        // [ signature ][ bptAmount ][ tokenAmounts length ][ tokenAmounts values ]
+                        // [  4 bytes  ][  32 bytes ][       32 bytes      ][ (32 * length) bytes ]
+                        //
+                        // We now need to return (ABI-encoded values):
+                        // [ bptAmount ][ tokeAmounts offset ][ tokenAmounts length ][ tokenAmounts values ]
+                        // [  32 bytes ][       32 bytes     ][       32 bytes      ][ (32 * length) bytes ]
+
+                        // We copy 32 bytes for the `bptAmount` from returndata into memory.
+                        // Note that we skip the first 4 bytes for the error signature
+                        returndatacopy(0, 0x04, 32)
+
+                        // The offsets are 32-bytes long, so the array of `tokenAmounts` will start after
+                        // the initial 64 bytes.
+                        mstore(0x20, 64)
+
+                        // We now copy the raw memory array for the `tokenAmounts` from returndata into memory.
+                        // Since bpt amount and offset take up 64 bytes, we start copying at address 0x40. We also
+                        // skip the first 36 bytes from returndata, which correspond to the signature plus bpt amount.
+                        returndatacopy(0x40, 0x24, sub(returndatasize(), 36))
+
+                        // We finally return the ABI-encoded uint256 and the array, which has a total length equal to
+                        // the size of returndata, plus the 32 bytes of the offset but without the 4 bytes of the
+                        // error signature.
+                        return(0, add(returndatasize(), 28))
+                    }
+                    default {
+                        // This call should always revert, but we fail nonetheless if that didn't happen
+                        invalid()
+                    }
+            }
+        } else {
+            uint256[] memory scalingFactors = _scalingFactors();
+            _upscaleArray(balances, scalingFactors);
+
+            (uint256 bptAmount, uint256[] memory tokenAmounts, ) = _action(
+                poolId,
+                sender,
+                recipient,
+                balances,
+                lastChangeBlock,
+                protocolSwapFeePercentage,
+                scalingFactors,
+                userData
+            );
+
+            _downscaleArray(tokenAmounts, scalingFactors);
+
+            // solhint-disable-next-line no-inline-assembly
+            assembly {
+                // We will return a raw representation of `bptAmount` and `tokenAmounts` in memory, which is composed of
+                // a 32-byte uint256, followed by a 32-byte for the array length, and finally the 32-byte uint256 values
+                // Because revert expects a size in bytes, we multiply the array length (stored at `tokenAmounts`) by 32
+                let size := mul(mload(tokenAmounts), 32)
+
+                // We store the `bptAmount` in the previous slot to the `tokenAmounts` array. We can make sure there
+                // will be at least one available slot due to how the memory scratch space works.
+                // We can safely overwrite whatever is stored in this slot as we will revert immediately after that.
+                let start := sub(tokenAmounts, 0x20)
+                mstore(start, bptAmount)
+
+                // We send one extra value for the error signature "QueryError(uint256,uint256[])" which is 0x43adbafb
+                // We use the previous slot to `bptAmount`.
+                mstore(sub(start, 0x20), 0x0000000000000000000000000000000000000000000000000000000043adbafb)
+                start := sub(start, 0x04)
+
+                // When copying from `tokenAmounts` into returndata, we copy the additional 68 bytes to also return
+                // the `bptAmount`, the array 's length, and the error signature.
+                revert(start, add(size, 68))
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/external/contracts/balancer/v2/BVault.sol b/external/contracts/balancer/v2/BVault.sol
new file mode 100644
index 000000000..27595f3f8
--- /dev/null
+++ b/external/contracts/balancer/v2/BVault.sol
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+import "@balancer-labs/v2-solidity-utils/contracts/misc/IWETH.sol";
+
+import "./interfaces/IAuthorizer.sol";
+
+import "./VaultAuthorization.sol";
+import "./FlashLoans.sol";
+import "./Swaps.sol";
+
+/**
+ * @dev The `Vault` is Balancer V2's core contract. A single instance of it exists for the entire network, and it is the
+ * entity used to interact with Pools by Liquidity Providers who join and exit them, Traders who swap, and Asset
+ * Managers who withdraw and deposit tokens.
+ *
+ * The `Vault`'s source code is split among a number of sub-contracts, with the goal of improving readability and making
+ * understanding the system easier. Most sub-contracts have been marked as `abstract` to explicitly indicate that only
+ * the full `Vault` is meant to be deployed.
+ *
+ * Roughly speaking, these are the contents of each sub-contract:
+ *
+ *  - `AssetManagers`: Pool token Asset Manager registry, and Asset Manager interactions.
+ *  - `Fees`: set and compute protocol fees.
+ *  - `FlashLoans`: flash loan transfers and fees.
+ *  - `PoolBalances`: Pool joins and exits.
+ *  - `PoolRegistry`: Pool registration, ID management, and basic queries.
+ *  - `PoolTokens`: Pool token registration and registration, and balance queries.
+ *  - `Swaps`: Pool swaps.
+ *  - `UserBalance`: manage user balances (Internal Balance operations and external balance transfers)
+ *  - `VaultAuthorization`: access control, relayers and signature validation.
+ *
+ * Additionally, the different Pool specializations are handled by the `GeneralPoolsBalance`,
+ * `MinimalSwapInfoPoolsBalance` and `TwoTokenPoolsBalance` sub-contracts, which in turn make use of the
+ * `BalanceAllocation` library.
+ *
+ * The most important goal of the `Vault` is to make token swaps use as little gas as possible. This is reflected in a
+ * multitude of design decisions, from minor things like the format used to store Pool IDs, to major features such as
+ * the different Pool specialization settings.
+ *
+ * Finally, the large number of tasks carried out by the Vault means its bytecode is very large, close to exceeding
+ * the contract size limit imposed by EIP 170 (https://eips.ethereum.org/EIPS/eip-170). Manual tuning of the source code
+ * was required to improve code generation and bring the bytecode size below this limit. This includes extensive
+ * utilization of `internal` functions (particularly inside modifiers), usage of named return arguments, dedicated
+ * storage access methods, dynamic revert reason generation, and usage of inline assembly, to name a few.
+ */
+contract Vault is VaultAuthorization, FlashLoans, Swaps {
+    constructor(
+        IAuthorizer authorizer,
+        IWETH weth,
+        uint256 pauseWindowDuration,
+        uint256 bufferPeriodDuration
+    ) VaultAuthorization(authorizer) AssetHelpers(weth) TemporarilyPausable(pauseWindowDuration, bufferPeriodDuration) {
+        // solhint-disable-previous-line no-empty-blocks
+    }
+
+    function setPaused(bool paused) external override nonReentrant authenticate {
+        _setPaused(paused);
+    }
+
+    // solhint-disable-next-line func-name-mixedcase
+    function WETH() external view override returns (IWETH) {
+        return _WETH();
+    }
+}
+© 2021 GitHub, Inc.
+Terms
+Privacy
+Security
+Status
+Docs
+Contact GitHub
+Pricing
+API
+Training
+Blog
+About
diff --git a/external/contracts/balancer/v2/WeightedPoolFactory.sol b/external/contracts/balancer/v2/WeightedPoolFactory.sol
new file mode 100644
index 000000000..fd924db35
--- /dev/null
+++ b/external/contracts/balancer/v2/WeightedPoolFactory.sol
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+import "@balancer-labs/v2-vault/contracts/interfaces/IVault.sol";
+
+import "@balancer-labs/v2-pool-utils/contracts/factories/BasePoolSplitCodeFactory.sol";
+import "@balancer-labs/v2-pool-utils/contracts/factories/FactoryWidePauseWindow.sol";
+
+import "./WeightedPool.sol";
+
+contract WeightedPoolFactory is BasePoolSplitCodeFactory, FactoryWidePauseWindow {
+    constructor(IVault vault) BasePoolSplitCodeFactory(vault, type(WeightedPool).creationCode) {
+        // solhint-disable-previous-line no-empty-blocks
+    }
+
+    /**
+     * @dev Deploys a new `WeightedPool`.
+     */
+    function create(
+        string memory name,
+        string memory symbol,
+        IERC20[] memory tokens,
+        uint256[] memory weights,
+        address[] memory assetManagers,
+        uint256 swapFeePercentage,
+        address owner
+    ) external returns (address) {
+        (uint256 pauseWindowDuration, uint256 bufferPeriodDuration) = getPauseConfiguration();
+
+        return
+            _create(
+                abi.encode(
+                    getVault(),
+                    name,
+                    symbol,
+                    tokens,
+                    weights,
+                    assetManagers,
+                    swapFeePercentage,
+                    pauseWindowDuration,
+                    bufferPeriodDuration,
+                    owner
+                )
+            );
+    }
+}
\ No newline at end of file
diff --git a/test/fixtures/balancerV2.spec.ts b/test/fixtures/balancerV2.spec.ts
new file mode 100644
index 000000000..b04a7f9be
--- /dev/null
+++ b/test/fixtures/balancerV2.spec.ts
@@ -0,0 +1,77 @@
+import "module-alias/register";
+
+import { Account } from "@utils/test/types";
+
+import {
+  addSnapshotBeforeRestoreAfterEach,
+  getAccounts,
+  getSystemFixture,
+  getBalancerV2Fixture,
+} from "@utils/test/index";
+import { SystemFixture, BalancerV2Fixture } from "@utils/fixtures";
+import { expect } from "chai";
+import { BigNumber } from "@ethersproject/bignumber";
+import { Address } from "@utils/types";
+import { ether } from "@utils/index";
+
+
+describe("BalancerFixture", () => {
+  let owner: Account;
+
+  let setup: SystemFixture;
+  let balancerSetup: BalancerV2Fixture;
+
+  before(async () => {
+    [
+      owner,
+    ] = await getAccounts();
+
+    setup = getSystemFixture(owner.address);
+    balancerSetup = getBalancerV2Fixture(owner.address);
+
+    await setup.initialize();
+  });
+
+  addSnapshotBeforeRestoreAfterEach();
+
+  describe("#initialize", async () => {
+    async function subject(): Promise<any> {
+      await balancerSetup.initialize(owner, setup.weth, setup.wbtc, setup.dai);
+    }
+
+    it("should deploy core balancer V2 contacts", async () => {
+      await subject();
+
+      expect(balancerSetup.vault).to.exist;
+      expect(balancerSetup.weightedPoolFactory).to.exist;
+    });
+
+    it("should create a WETH-DAI pool", async () => {
+      await subject();
+
+      expect(balancerSetup.wethDaiPoolId).to.exist;
+    });
+  });
+
+  describe("#createPool", async () => {
+    let subjectTokens: Address[];
+    let subjectWeights: BigNumber[];
+
+    beforeEach(async () => {
+      await balancerSetup.initialize(owner, setup.weth, setup.wbtc, setup.dai);
+
+      subjectTokens = [setup.wbtc.address, setup.weth.address];
+      subjectWeights = [ether(0.3), ether(0.7)];
+    });
+
+    async function subject(): Promise<string> {
+      return await balancerSetup.createPool(subjectTokens, subjectWeights);
+    }
+
+    it("should return a pool id", async () => {
+      const id = await subject();
+
+      expect(id).to.not.eq("");
+    });
+  });
+});
\ No newline at end of file
diff --git a/test/integration/balancerV2ExchangeGeneralIndexModule.spec.ts b/test/integration/balancerV2ExchangeGeneralIndexModule.spec.ts
new file mode 100644
index 000000000..a83123973
--- /dev/null
+++ b/test/integration/balancerV2ExchangeGeneralIndexModule.spec.ts
@@ -0,0 +1,303 @@
+import "module-alias/register";
+import { BigNumber } from "@ethersproject/bignumber";
+
+import { Address } from "@utils/types";
+import { Account } from "@utils/test/types";
+import { ADDRESS_ZERO, EMPTY_BYTES, MAX_UINT_256, ZERO } from "@utils/constants";
+import {
+  GeneralIndexModule,
+  SetToken,
+  BalancerV2IndexExchangeAdapter
+} from "@utils/contracts";
+import DeployHelper from "@utils/deploys";
+import {
+  bitcoin,
+  ether,
+  preciseDiv,
+  preciseMul,
+} from "@utils/index";
+import {
+  cacheBeforeEach,
+  getAccounts,
+  getSystemFixture,
+  getBalancerV2Fixture,
+  getWaffleExpect
+} from "@utils/test/index";
+import { BalancerV2Fixture, SystemFixture } from "@utils/fixtures";
+import { ContractTransaction } from "ethers";
+import { defaultAbiCoder } from "@ethersproject/abi";
+
+const expect = getWaffleExpect();
+
+describe("BalancerV2ExchangeGeneralIndexModule", () => {
+  let owner: Account;
+  let trader: Account;
+  let positionModule: Account;
+  let deployer: DeployHelper;
+  let setup: SystemFixture;
+
+  let balancerSetup: BalancerV2Fixture;
+
+  let index: SetToken;
+  let indexModule: GeneralIndexModule;
+
+  let exchangeAdapter: BalancerV2IndexExchangeAdapter;
+  let exchangeAdapterName: string;
+
+  let indexComponents: Address[];
+  let indexUnits: BigNumber[];
+
+  before(async () => {
+    [
+      owner,
+      trader,
+      positionModule,
+    ] = await getAccounts();
+
+    deployer = new DeployHelper(owner.wallet);
+    setup = getSystemFixture(owner.address);
+    balancerSetup = getBalancerV2Fixture(owner.address);
+
+    await setup.initialize();
+    await balancerSetup.initialize(owner, setup.weth, setup.wbtc, setup.dai);
+
+    indexModule = await deployer.modules.deployGeneralIndexModule(
+      setup.controller.address,
+      setup.weth.address
+    );
+    await setup.controller.addModule(indexModule.address);
+    await setup.controller.addModule(positionModule.address);
+
+
+    exchangeAdapter = await deployer.adapters.deployBalancerV2IndexExchangeAdapter(balancerSetup.vault.address);
+    exchangeAdapterName = "BalancerV2IndexExchangeAdapter";
+
+
+    await setup.integrationRegistry.batchAddIntegration(
+      [ indexModule.address ],
+      [ exchangeAdapterName ],
+      [ exchangeAdapter.address ]
+    );
+  });
+
+  cacheBeforeEach(async () => {
+    indexComponents = [setup.wbtc.address, setup.dai.address];
+    indexUnits = [ bitcoin(0.01), ether(4000) ];
+
+    index = await setup.createSetToken(
+      indexComponents,
+      indexUnits,
+      [setup.issuanceModule.address, indexModule.address, positionModule.address],
+    );
+
+    await setup.issuanceModule.initialize(index.address, ADDRESS_ZERO);
+    await index.connect(positionModule.wallet).initializeModule();
+
+    await setup.weth.connect(owner.wallet).approve(balancerSetup.vault.address, MAX_UINT_256);
+    await setup.dai.connect(owner.wallet).approve(balancerSetup.vault.address, MAX_UINT_256);
+    await setup.wbtc.connect(owner.wallet).approve(balancerSetup.vault.address, MAX_UINT_256);
+
+    await balancerSetup.depositInitial(balancerSetup.wethDaiPoolId, owner, [setup.weth.address, setup.dai.address], [ether(100), ether(400_000)]);
+    await balancerSetup.depositInitial(balancerSetup.wethWbtcPoolId, owner, [setup.weth.address, setup.wbtc.address], [ether(100), bitcoin(4)]);
+  });
+
+  describe("when module is initalized", async () => {
+    let subjectSetToken: SetToken;
+    let subjectCaller: Account;
+
+    let newComponents: Address[];
+    let newTargetUnits: BigNumber[];
+    let oldTargetUnits: BigNumber[];
+    let issueAmount: BigNumber;
+
+    async function initSetToken(
+      setToken: SetToken, components: Address[], tradeMaximums: BigNumber[], exchanges: string[], coolOffPeriods: BigNumber[]
+    ) {
+      await indexModule.initialize(setToken.address);
+      await indexModule.setTradeMaximums(setToken.address, components, tradeMaximums);
+      await indexModule.setExchanges(setToken.address, components, exchanges);
+      await indexModule.setCoolOffPeriods(setToken.address, components, coolOffPeriods);
+      await indexModule.setTraderStatus(setToken.address, [trader.address], [true]);
+    }
+
+    const startRebalance = async () => {
+      await setup.approveAndIssueSetToken(subjectSetToken, issueAmount);
+      await indexModule.startRebalance(
+        subjectSetToken.address,
+        newComponents,
+        newTargetUnits,
+        oldTargetUnits,
+        await index.positionMultiplier()
+      );
+    };
+
+    before(async () => {
+      newComponents = [];
+      oldTargetUnits = [bitcoin(0.1), ether(1)];
+      newTargetUnits = [];
+      issueAmount = ether("20.000000000000000001");
+    });
+
+    cacheBeforeEach(async () => {
+      await initSetToken(
+        index,
+       [setup.wbtc.address, setup.dai.address],
+       [bitcoin(1000), ether(100000)],
+       [exchangeAdapterName, exchangeAdapterName],
+       [ZERO, ZERO]
+      );
+    });
+
+    describe("#trade", async () => {
+      let subjectComponent: Address;
+      let subjectEthQuantityLimit: BigNumber;
+
+      let expectedOut: BigNumber;
+
+      const initializeSubjectVariables = () => {
+        subjectSetToken = index;
+        subjectCaller = trader;
+        subjectComponent = setup.dai.address;
+        subjectEthQuantityLimit = ZERO;
+      };
+
+      async function subject(): Promise<ContractTransaction> {
+        return await indexModule.connect(subjectCaller.wallet).trade(
+          subjectSetToken.address,
+          subjectComponent,
+          subjectEthQuantityLimit
+        );
+      }
+
+      beforeEach(async () => {
+
+        initializeSubjectVariables();
+
+        const exchangeData = defaultAbiCoder.encode(["bytes32"], [balancerSetup.wethDaiPoolId]);
+        await indexModule.setExchangeData(subjectSetToken.address, [setup.dai.address], [exchangeData]);
+
+        expectedOut = await balancerSetup.vault.connect(owner.address).callStatic.swap(
+          {
+            poolId: balancerSetup.wethDaiPoolId,
+            kind: 0,
+            assetIn: setup.dai.address,
+            assetOut: setup.weth.address,
+            amount: preciseMul(ether(3999), issueAmount),
+            userData: EMPTY_BYTES,
+          },
+          {
+            sender: owner.address,
+            fromInternalBalance: false,
+            recipient: owner.address,
+            toInternalBalance: false,
+          },
+          0,
+          MAX_UINT_256,
+        );
+
+        subjectEthQuantityLimit = BigNumber.from(0);
+      });
+
+      cacheBeforeEach(startRebalance);
+
+      it("should sell using Balancer V2", async () => {
+        const currentWethAmount = await setup.weth.balanceOf(subjectSetToken.address);
+        const totalSupply = await subjectSetToken.totalSupply();
+
+        await subject();
+
+        const expectedWethPositionUnits = preciseDiv(currentWethAmount.add(expectedOut), totalSupply);
+        const expectedDaiPositionUnits = ether(1);
+
+        const wethPositionUnits = await subjectSetToken.getDefaultPositionRealUnit(setup.weth.address);
+        const daiPositionUnits = await subjectSetToken.getDefaultPositionRealUnit(setup.dai.address);
+
+        expect(wethPositionUnits).to.eq(expectedWethPositionUnits);
+        expect(daiPositionUnits).to.eq(expectedDaiPositionUnits);
+      });
+    });
+
+    describe("#tradeRemainingWETH", async () => {
+
+      let subjectComponent: Address;
+      let subjectEthQuantityLimit: BigNumber;
+
+      let expectedOut: BigNumber;
+
+      const initializeSubjectVariables = () => {
+        subjectSetToken = index;
+        subjectCaller = trader;
+        subjectComponent = setup.dai.address;
+        subjectEthQuantityLimit = ZERO;
+      };
+
+      async function subject(): Promise<ContractTransaction> {
+        return await indexModule.connect(subjectCaller.wallet).tradeRemainingWETH(
+          subjectSetToken.address,
+          subjectComponent,
+          subjectEthQuantityLimit
+        );
+      }
+
+      context("when using default target units", async () => {
+
+        cacheBeforeEach(startRebalance);
+
+        beforeEach(async () => {
+          initializeSubjectVariables();
+
+          const exchangeDataDai = defaultAbiCoder.encode(["bytes32"], [balancerSetup.wethDaiPoolId]);
+          await indexModule.setExchangeData(subjectSetToken.address, [setup.dai.address], [exchangeDataDai]);
+
+          const exchangeDataWbtc = defaultAbiCoder.encode(["bytes32"], [balancerSetup.wethWbtcPoolId]);
+          await indexModule.setExchangeData(subjectSetToken.address, [setup.wbtc.address], [exchangeDataWbtc]);
+
+          await indexModule.connect(subjectCaller.wallet).trade(
+            subjectSetToken.address,
+            subjectComponent,
+            subjectEthQuantityLimit
+          );
+
+
+          expectedOut = await balancerSetup.vault.connect(owner.address).callStatic.swap(
+            {
+              poolId: balancerSetup.wethWbtcPoolId,
+              kind: 0,
+              assetIn: setup.weth.address,
+              assetOut: setup.wbtc.address,
+              amount: await setup.weth.balanceOf(subjectSetToken.address),
+              userData: EMPTY_BYTES,
+            },
+            {
+              sender: owner.address,
+              fromInternalBalance: false,
+              recipient: owner.address,
+              toInternalBalance: false,
+            },
+            0,
+            MAX_UINT_256,
+          );
+
+          subjectComponent = setup.wbtc.address;
+          subjectEthQuantityLimit = ZERO;
+        });
+
+        it("should buy using Balancer V2", async () => {
+          const currentWbtcAmount = await setup.wbtc.balanceOf(subjectSetToken.address);
+          const totalSupply = await subjectSetToken.totalSupply();
+
+          await subject();
+
+          const expectedWbtcPositionUnits = preciseDiv(currentWbtcAmount.add(expectedOut), totalSupply);
+          const expectedWethPositionUnits = ether(0);
+
+          const wethPositionUnits = await subjectSetToken.getDefaultPositionRealUnit(setup.weth.address);
+          const wbtcPositionUnits = await subjectSetToken.getDefaultPositionRealUnit(setup.wbtc.address);
+
+          expect(wbtcPositionUnits).to.eq(expectedWbtcPositionUnits);
+          expect(wethPositionUnits).to.eq(expectedWethPositionUnits);
+        });
+      });
+    });
+  });
+});
\ No newline at end of file
diff --git a/test/protocol/integration/index-exchange/balancerV2IndexExchangeAdapter.spec.ts b/test/protocol/integration/index-exchange/balancerV2IndexExchangeAdapter.spec.ts
new file mode 100644
index 000000000..ea2862f3a
--- /dev/null
+++ b/test/protocol/integration/index-exchange/balancerV2IndexExchangeAdapter.spec.ts
@@ -0,0 +1,195 @@
+import "module-alias/register";
+
+import { BigNumber } from "@ethersproject/bignumber";
+
+import { Address, Bytes } from "@utils/types";
+import { Account } from "@utils/test/types";
+import {
+  EMPTY_BYTES,
+  MAX_UINT_256,
+} from "@utils/constants";
+import { BalancerV2IndexExchangeAdapter } from "@utils/contracts";
+import DeployHelper from "@utils/deploys";
+import {
+  ether,
+} from "@utils/index";
+import {
+  addSnapshotBeforeRestoreAfterEach,
+  getAccounts,
+  getSystemFixture,
+  getBalancerV2Fixture,
+  getWaffleExpect
+} from "@utils/test/index";
+
+import { SystemFixture, BalancerV2Fixture } from "@utils/fixtures";
+import { defaultAbiCoder } from "@ethersproject/abi";
+
+const expect = getWaffleExpect();
+
+describe("BalancerV2IndexExchangeAdapter", () => {
+  let owner: Account;
+  let mockSetToken: Account;
+  let deployer: DeployHelper;
+  let setup: SystemFixture;
+  let balancerSetup: BalancerV2Fixture;
+
+  let balancerV2ExchangeAdapter: BalancerV2IndexExchangeAdapter;
+
+  before(async () => {
+    [
+      owner,
+      mockSetToken,
+    ] = await getAccounts();
+
+    deployer = new DeployHelper(owner.wallet);
+    setup = getSystemFixture(owner.address);
+    await setup.initialize();
+
+    balancerSetup = getBalancerV2Fixture(owner.address);
+    await balancerSetup.initialize(
+      owner,
+      setup.weth,
+      setup.wbtc,
+      setup.dai
+    );
+
+    balancerV2ExchangeAdapter = await deployer.adapters.deployBalancerV2IndexExchangeAdapter(balancerSetup.vault.address);
+  });
+
+  addSnapshotBeforeRestoreAfterEach();
+
+  describe("#constructor", async () => {
+    let subjectVaultAddress: Address;
+
+    beforeEach(async () => {
+        subjectVaultAddress = balancerSetup.vault.address;
+    });
+
+    async function subject(): Promise<BalancerV2IndexExchangeAdapter> {
+      return await deployer.adapters.deployBalancerV2IndexExchangeAdapter(subjectVaultAddress);
+    }
+
+    it("should have the correct vault address", async () => {
+      const deployedBalancerV2ExchangeAdapter = await subject();
+
+      const actualVaultAddress = await deployedBalancerV2ExchangeAdapter.vault();
+      expect(actualVaultAddress).to.eq(subjectVaultAddress);
+    });
+  });
+
+  describe("#getSpender", async () => {
+    async function subject(): Promise<any> {
+      return await balancerV2ExchangeAdapter.getSpender();
+    }
+
+    it("should return the correct spender address", async () => {
+      const spender = await subject();
+
+      expect(spender).to.eq(balancerSetup.vault.address);
+    });
+  });
+
+  describe("#getTradeCalldata", async () => {
+    let sourceToken: Address;
+    let destinationToken: Address;
+    let sourceQuantity: BigNumber;
+    let destinationQuantity: BigNumber;
+
+    let subjectMockSetToken: Address;
+    let subjectSourceToken: Address;
+    let subjectDestinationToken: Address;
+    let subjectIsSendTokenFixed: boolean;
+    let subjectSourceQuantity: BigNumber;
+    let subjectDestinationQuantity: BigNumber;
+    let subjectData: Bytes;
+
+    beforeEach(async () => {
+      sourceToken = setup.weth.address;          		// WETH Address
+      sourceQuantity = ether(1);  	                  // Trade 1 WETH
+      destinationToken = setup.dai.address;      		// DAI Address
+      destinationQuantity = ether(5000);          	// Receive at least 5k DAI
+
+      subjectSourceToken = sourceToken;
+      subjectDestinationToken = destinationToken;
+      subjectMockSetToken = mockSetToken.address;
+      subjectIsSendTokenFixed = true;
+      subjectSourceQuantity = sourceQuantity;
+      subjectDestinationQuantity = destinationQuantity;
+      subjectData = defaultAbiCoder.encode(["bytes32"], [balancerSetup.wethDaiPoolId]);
+    });
+
+    async function subject(): Promise<[Address, BigNumber, string]> {
+      return await balancerV2ExchangeAdapter.connect(mockSetToken.wallet).getTradeCalldata(
+        subjectSourceToken,
+        subjectDestinationToken,
+        subjectMockSetToken,
+        subjectIsSendTokenFixed,
+        subjectSourceQuantity,
+        subjectDestinationQuantity,
+        subjectData,
+      );
+    }
+
+    context("when boolean fixed input amount is true", async () => {
+      it("should return the correct trade calldata", async () => {
+        const [ to, value, calldata ] = await subject();
+
+        const expectedCalldata = balancerSetup.vault.interface.encodeFunctionData("swap", [
+          {
+            poolId: balancerSetup.wethDaiPoolId,
+            kind: 0,
+            assetIn: subjectSourceToken,
+            assetOut: subjectDestinationToken,
+            amount: subjectSourceQuantity,
+            userData: EMPTY_BYTES,
+          },
+          {
+            sender: mockSetToken.address,
+            fromInternalBalance: false,
+            recipient: mockSetToken.address,
+            toInternalBalance: false,
+          },
+          subjectDestinationQuantity,
+          MAX_UINT_256,
+        ]);
+
+        expect(to).to.eq(balancerSetup.vault.address);
+        expect(value).to.eq(0);
+        expect(calldata).to.eq(expectedCalldata);
+      });
+    });
+
+    context("when boolean fixed input amount is false", async () => {
+      beforeEach(async () => {
+        subjectIsSendTokenFixed = false;
+      });
+
+      it("should return the correct trade calldata", async () => {
+        const [ to, value, calldata ] = await subject();
+
+        const expectedCalldata = balancerSetup.vault.interface.encodeFunctionData("swap", [
+          {
+            poolId: balancerSetup.wethDaiPoolId,
+            kind: 1,
+            assetIn: subjectSourceToken,
+            assetOut: subjectDestinationToken,
+            amount: subjectDestinationQuantity,
+            userData: EMPTY_BYTES,
+          },
+          {
+            sender: mockSetToken.address,
+            fromInternalBalance: false,
+            recipient: mockSetToken.address,
+            toInternalBalance: false,
+          },
+          subjectSourceQuantity,
+          MAX_UINT_256,
+        ]);
+
+        expect(to).to.eq(balancerSetup.vault.address);
+        expect(value).to.eq(0);
+        expect(calldata).to.eq(expectedCalldata);
+      });
+    });
+  });
+});
diff --git a/utils/contracts/balancerV2.ts b/utils/contracts/balancerV2.ts
new file mode 100644
index 000000000..cb0655c99
--- /dev/null
+++ b/utils/contracts/balancerV2.ts
@@ -0,0 +1,3 @@
+// External Balancer V2 Contracts
+export { BVault } from "../../typechain/BVault";
+export { WeightedPoolFactory } from "../../typechain/WeightedPoolFactory";
\ No newline at end of file
diff --git a/utils/contracts/index.ts b/utils/contracts/index.ts
index b75de1ad0..8b8217af3 100644
--- a/utils/contracts/index.ts
+++ b/utils/contracts/index.ts
@@ -16,6 +16,7 @@ export { AGIMigrationWrapAdapter } from "../../typechain/AGIMigrationWrapAdapter
 export { AssetLimitHook } from "../../typechain/AssetLimitHook";
 export { AxieInfinityMigrationWrapAdapter } from "../../typechain/AxieInfinityMigrationWrapAdapter";
 export { BalancerV1IndexExchangeAdapter } from "../../typechain/BalancerV1IndexExchangeAdapter";
+export { BalancerV2IndexExchangeAdapter } from "../../typechain/BalancerV2IndexExchangeAdapter";
 export { BasicIssuanceModule } from "../../typechain/BasicIssuanceModule";
 export { ClaimAdapterMock } from "../../typechain/ClaimAdapterMock";
 export { ClaimModule } from "../../typechain/ClaimModule";
diff --git a/utils/deploys/deployAdapters.ts b/utils/deploys/deployAdapters.ts
index ab737b54b..96fda27b9 100644
--- a/utils/deploys/deployAdapters.ts
+++ b/utils/deploys/deployAdapters.ts
@@ -7,6 +7,7 @@ import {
   AGIMigrationWrapAdapter,
   AxieInfinityMigrationWrapAdapter,
   BalancerV1IndexExchangeAdapter,
+  BalancerV2IndexExchangeAdapter,
   CompoundLikeGovernanceAdapter,
   CurveStakingAdapter,
   KyberExchangeAdapter,
@@ -40,6 +41,7 @@ import { AaveGovernanceV2Adapter__factory } from "../../typechain/factories/Aave
 import { AaveV2WrapV2Adapter__factory } from "../../typechain/factories/AaveV2WrapV2Adapter__factory";
 import { AxieInfinityMigrationWrapAdapter__factory } from "../../typechain/factories/AxieInfinityMigrationWrapAdapter__factory";
 import { BalancerV1IndexExchangeAdapter__factory } from "../../typechain/factories/BalancerV1IndexExchangeAdapter__factory";
+import { BalancerV2IndexExchangeAdapter__factory } from "../../typechain/factories/BalancerV2IndexExchangeAdapter__factory";
 import { CompoundLikeGovernanceAdapter__factory } from "../../typechain/factories/CompoundLikeGovernanceAdapter__factory";
 import { CurveStakingAdapter__factory } from "../../typechain/factories/CurveStakingAdapter__factory";
 import { KyberExchangeAdapter__factory } from "../../typechain/factories/KyberExchangeAdapter__factory";
@@ -242,4 +244,8 @@ export default class DeployAdapters {
   public async deployAaveV2WrapV2Adapter(lendingPool: Address): Promise<AaveV2WrapV2Adapter> {
     return await new AaveV2WrapV2Adapter__factory(this._deployerSigner).deploy(lendingPool);
   }
+
+  public async deployBalancerV2IndexExchangeAdapter(vault: Address): Promise<BalancerV2IndexExchangeAdapter> {
+    return await new BalancerV2IndexExchangeAdapter__factory(this._deployerSigner).deploy(vault);
+  }
 }
diff --git a/utils/deploys/deployExternal.ts b/utils/deploys/deployExternal.ts
index 5982514d7..157f0c7f7 100644
--- a/utils/deploys/deployExternal.ts
+++ b/utils/deploys/deployExternal.ts
@@ -1,6 +1,8 @@
 import { Signer } from "ethers";
 import { BigNumberish, BigNumber } from "@ethersproject/bignumber";
 import { ether } from "../common";
+import { ADDRESS_ZERO, ZERO } from "@utils/constants";
+import { Address } from "./../types";
 
 import {
   CompoundPriceOracleMock,
@@ -21,8 +23,6 @@ import {
   DelegateRegistry
 } from "./../contracts";
 
-import { Address } from "./../types";
-
 import { CERc20__factory } from "../../typechain/factories/CERc20__factory";
 import { CEther__factory } from "../../typechain/factories/CEther__factory";
 import { CompoundPriceOracleMock__factory } from "../../typechain/factories/CompoundPriceOracleMock__factory";
@@ -202,6 +202,13 @@ import { AaveGovernanceV2__factory } from "../../typechain/factories/AaveGoverna
 import { Executor__factory } from "../../typechain/factories/Executor__factory";
 import { GovernanceStrategy__factory } from "../../typechain/factories/GovernanceStrategy__factory";
 
+import {
+  BVault,
+  WeightedPoolFactory
+} from "../contracts/balancerV2";
+import { BVault__factory } from "../../typechain/factories/BVault__factory";
+import { WeightedPoolFactory__factory } from "../../typechain/factories/WeightedPoolFactory__factory";
+
 export default class DeployExternalContracts {
   private _deployerSigner: Signer;
 
@@ -772,4 +779,13 @@ export default class DeployExternalContracts {
   public async deployNFTDescriptor(): Promise<NFTDescriptor> {
     return await new NFTDescriptor__factory(this._deployerSigner).deploy();
   }
+
+  // Balancer V2
+  public async deployBVault(weth: Address): Promise<BVault> {
+    return await new BVault__factory(this._deployerSigner).deploy(ADDRESS_ZERO, weth, ZERO, ZERO);
+  }
+
+  public async deployWeightedPoolFactory(vault: Address): Promise<WeightedPoolFactory> {
+    return await new WeightedPoolFactory__factory(this._deployerSigner).deploy(vault);
+  }
 }
diff --git a/utils/fixtures/balancerV2Fixture.ts b/utils/fixtures/balancerV2Fixture.ts
new file mode 100644
index 000000000..fffa441e9
--- /dev/null
+++ b/utils/fixtures/balancerV2Fixture.ts
@@ -0,0 +1,92 @@
+import { Signer } from "@ethersproject/abstract-signer";
+import { JsonRpcProvider, Web3Provider } from "@ethersproject/providers";
+import { ether } from "@utils/common";
+import DeployHelper from "@utils/deploys";
+import { Account } from "@utils/test/types";
+import { Address } from "@utils/types";
+
+import { StandardTokenMock, WETH9 } from "../contracts/index";
+import { BVault, WeightedPoolFactory } from "../contracts/balancerV2";
+import { BPoolV2__factory } from "../../typechain/factories/BPoolV2__factory";
+import { BigNumber } from "@ethersproject/bignumber";
+import { defaultAbiCoder } from "@ethersproject/abi";
+
+export class BalancerV2Fixture {
+  private _deployer: DeployHelper;
+  private _ownerSigner: Signer;
+
+  public owner: Account;
+
+  public vault: BVault;
+  public weightedPoolFactory: WeightedPoolFactory;
+  public wethDaiPoolId: string;
+  public wethWbtcPoolId: string;
+
+  constructor(provider: Web3Provider | JsonRpcProvider, ownerAddress: Address) {
+    this._ownerSigner = provider.getSigner(ownerAddress);
+    this._deployer = new DeployHelper(this._ownerSigner);
+  }
+
+  public async initialize(_owner: Account, _weth: WETH9, _wbtc: StandardTokenMock, _dai: StandardTokenMock): Promise<void> {
+    this.owner = _owner;
+
+    this.vault = await this._deployer.external.deployBVault(_weth.address);
+    this.weightedPoolFactory = await this._deployer.external.deployWeightedPoolFactory(this.vault.address);
+
+    const tokens = [ _weth.address, _dai.address ];
+    tokens.sort((a, b) => parseInt(a) - parseInt(b));
+
+    this.wethDaiPoolId = await this.createPool(
+      [ _weth.address, _dai.address ],
+      [ ether(0.5), ether(0.5) ]
+    );
+
+    this.wethWbtcPoolId = await this.createPool(
+      [ _weth.address, _wbtc.address ],
+      [ ether(0.5), ether(0.5) ]
+    );
+  }
+
+  public async createPool(tokens: Address[], weights: BigNumber[]): Promise<string> {
+
+    const tokenAndWeights = tokens.map((token, i) => { return {address: token, weight: weights[i]}; });
+    tokenAndWeights.sort((a, b) => parseInt(a.address) - parseInt(b.address));
+
+    const tx = await this.weightedPoolFactory.create(
+      "name",
+      "symbol",
+      tokenAndWeights.map(tw => tw.address),
+      tokenAndWeights.map(tw => tw.weight),
+      ether(0.001),
+      this.owner.address
+    );
+
+    const receipt = await tx.wait();
+    const events = receipt.events?.filter(e => e.event === "PoolCreated");
+    if (events) {
+      const poolAddress = events[0].args?.pool;
+      return await new BPoolV2__factory(this._ownerSigner).attach(poolAddress).getPoolId();
+    }
+
+    return "";
+  }
+
+  public async depositInitial(poolId: string, from: Account, tokens: Address[], amounts: BigNumber[]): Promise<void> {
+    const tokenAndAmounts = tokens.map((token, i) => { return {address: token, amount: amounts[i]}; });
+    tokenAndAmounts.sort((a, b) => parseInt(a.address) - parseInt(b.address));
+
+    const initUserData = defaultAbiCoder.encode(["uint256", "uint256[]"], [0, tokenAndAmounts.map(ta => ta.amount)]);
+
+    await this.vault.connect(from.wallet).joinPool(
+      poolId,
+      from.address,
+      from.address,
+      {
+        assets: tokenAndAmounts.map(ta => ta.address),
+        maxAmountsIn: tokenAndAmounts.map(ta => ta.amount),
+        userData: initUserData,
+        fromInternalBalance: false,
+      }
+    );
+  }
+}
\ No newline at end of file
diff --git a/utils/fixtures/index.ts b/utils/fixtures/index.ts
index 7bd918025..2377a791a 100644
--- a/utils/fixtures/index.ts
+++ b/utils/fixtures/index.ts
@@ -1,6 +1,7 @@
 export { AaveFixture } from "./aaveFixture";
 export { AaveV2Fixture } from "./aaveV2Fixture";
 export { BalancerFixture } from "./balancerFixture";
+export { BalancerV2Fixture } from "./balancerV2Fixture";
 export { CompoundFixture } from "./compoundFixture";
 export { CurveFixture } from "./curveFixture";
 export { KyberV3DMMFixture } from "./kyberV3DMMFixture";
diff --git a/utils/test/index.ts b/utils/test/index.ts
index c5c760f3c..5ef0ee8df 100644
--- a/utils/test/index.ts
+++ b/utils/test/index.ts
@@ -6,6 +6,7 @@ import {
   AaveFixture,
   AaveV2Fixture,
   BalancerFixture,
+  BalancerV2Fixture,
   CompoundFixture,
   CurveFixture,
   KyberV3DMMFixture,
@@ -24,6 +25,7 @@ export const getBlockchainUtils = () => new Blockchain(provider);
 export const getAaveFixture = (ownerAddress: Address) => new AaveFixture(provider, ownerAddress);
 export const getAaveV2Fixture = (ownerAdderss: Address) => new AaveV2Fixture(provider, ownerAdderss);
 export const getBalancerFixture = (ownerAddress: Address) => new BalancerFixture(provider, ownerAddress);
+export const getBalancerV2Fixture = (ownerAddress: Address) => new BalancerV2Fixture(provider, ownerAddress);
 export const getCurveFixture = (ownerAddress: Address) => new CurveFixture(provider, ownerAddress);
 export const getCompoundFixture = (ownerAddress: Address) => new CompoundFixture(provider, ownerAddress);
 export const getKyberV3DMMFixture = (ownerAddress: Address) => new KyberV3DMMFixture(provider, ownerAddress);