feat: add balancer v2 executor

foundry/lib/balancer-labs/v2-interfaces/contracts/standalone-utils/IReaperTokenVault.sol

@@ -0,0 +1,54 @@
+// 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 <0.9.0;
+
+import "../solidity-utils/openzeppelin/IERC20.sol";
+
+// Source: https://github.com/Byte-Masons/beet-strat/blob/master/contracts/ReaperVaultv1_4.sol
+// Interface definition for the ReaperTokenVault contract, a single strategy vault
+// for Reaper Farm crypts. The pricePerFullShare is always represented with 18 decimals,
+// regardless of the underlying token decimals.
+// ie: If ppfs === 1e18, 1 USDC === 0.000_000_000_001_000_000 rfUSDC
+// ie: If ppfs === 1e18, 1 DAI === 1 rfDAI
+interface IReaperTokenVault is IERC20 {
+    /**
+     * @dev returns the address of the vault's underlying asset (mainToken)
+     */
+    function token() external view returns (address);
+
+    /**
+     * @dev returns the price for a single Vault share (ie rf-scfUSDT). The getPricePerFullShare is always in 1e18
+     */
+    function getPricePerFullShare() external view returns (uint256);
+
+    /**
+     * @notice Deposits `_amount` `token`, issuing shares to the caller.
+     * If Panic is activated, deposits will not be accepted and this call will fail.
+     * @param _amount The quantity of tokens to deposit.
+     **/
+    function deposit(uint256 _amount) external;
+
+    /**
+     * @notice Withdraws the calling account's tokens from this Vault,
+     * redeeming amount `_shares` for an appropriate amount of tokens.
+     **/
+    function withdraw(uint256 _shares) external;
+
+    /**
+     * @dev returns the number of decimals for this vault token.
+     * For reaper single-strat vaults, the decimals are fixed to 18.
+     */
+    function decimals() external view returns (uint8);
+}