feat: add balancer v2 executor
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royvardhan
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol)
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pragma solidity >=0.7.0 <0.9.0;
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/**
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* @dev Interface of the ERC1271 standard signature validation method for
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* contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
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*
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* _Available since v4.1._
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*/
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interface IERC1271 {
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/**
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* @dev Should return whether the signature provided is valid for the provided data
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* @param hash Hash of the data to be signed
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* @param signature Signature byte array associated with _data
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*/
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function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
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}
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// SPDX-License-Identifier: MIT
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pragma solidity >=0.7.0 <0.9.0;
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/**
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* @dev Interface of the ERC20 standard as defined in the EIP.
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*/
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interface IERC20 {
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/**
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* @dev Returns the amount of tokens in existence.
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*/
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function totalSupply() external view returns (uint256);
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/**
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* @dev Returns the amount of tokens owned by `account`.
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*/
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function balanceOf(address account) external view returns (uint256);
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/**
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* @dev Moves `amount` tokens from the caller's account to `recipient`.
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*
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* Returns a boolean value indicating whether the operation succeeded.
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*
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* Emits a {Transfer} event.
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*/
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function transfer(address recipient, uint256 amount) external returns (bool);
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/**
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* @dev Returns the remaining number of tokens that `spender` will be
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* allowed to spend on behalf of `owner` through {transferFrom}. This is
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* zero by default.
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*
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* This value changes when {approve} or {transferFrom} are called.
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*/
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function allowance(address owner, address spender) external view returns (uint256);
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/**
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* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
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*
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* Returns a boolean value indicating whether the operation succeeded.
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*
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* IMPORTANT: Beware that changing an allowance with this method brings the risk
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* that someone may use both the old and the new allowance by unfortunate
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* transaction ordering. One possible solution to mitigate this race
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* condition is to first reduce the spender's allowance to 0 and set the
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* desired value afterwards:
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* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
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*
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* Emits an {Approval} event.
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*/
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function approve(address spender, uint256 amount) external returns (bool);
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/**
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* @dev Moves `amount` tokens from `sender` to `recipient` using the
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* allowance mechanism. `amount` is then deducted from the caller's
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* allowance.
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*
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* Returns a boolean value indicating whether the operation succeeded.
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*
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* Emits a {Transfer} event.
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*/
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function transferFrom(
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address sender,
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address recipient,
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uint256 amount
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) external returns (bool);
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/**
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* @dev Emitted when `value` tokens are moved from one account (`from`) to
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* another (`to`).
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*
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* Note that `value` may be zero.
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*/
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event Transfer(address indexed from, address indexed to, uint256 value);
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/**
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* @dev Emitted when the allowance of a `spender` for an `owner` is set by
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* a call to {approve}. `value` is the new allowance.
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*/
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event Approval(address indexed owner, address indexed spender, uint256 value);
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}
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@@ -0,0 +1,59 @@
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// SPDX-License-Identifier: MIT
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pragma solidity >=0.7.0 <0.9.0;
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/**
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* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
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* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
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*
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* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
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* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
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* need to send a transaction, and thus is not required to hold Ether at all.
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*/
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interface IERC20Permit {
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/**
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* @dev Sets `value` as the allowance of `spender` over `owner`'s tokens,
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* given `owner`'s signed approval.
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*
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* IMPORTANT: The same issues {IERC20-approve} has related to transaction
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* ordering also apply here.
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*
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* Emits an {Approval} event.
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*
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* Requirements:
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*
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* - `spender` cannot be the zero address.
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* - `deadline` must be a timestamp in the future.
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* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
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* over the EIP712-formatted function arguments.
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* - the signature must use ``owner``'s current nonce (see {nonces}).
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*
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* For more information on the signature format, see the
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* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
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* section].
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*/
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function permit(
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address owner,
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address spender,
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uint256 value,
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uint256 deadline,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external;
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/**
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* @dev Returns the current nonce for `owner`. This value must be
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* included whenever a signature is generated for {permit}.
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*
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* Every successful call to {permit} increases ``owner``'s nonce by one. This
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* prevents a signature from being used multiple times.
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*/
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function nonces(address owner) external view returns (uint256);
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/**
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* @dev Returns the domain separator used in the encoding of the signature for `permit`, as defined by {EIP712}.
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*/
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// solhint-disable-next-line func-name-mixedcase
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function DOMAIN_SEPARATOR() external view returns (bytes32);
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}
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@@ -0,0 +1,27 @@
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// SPDX-License-Identifier: MIT
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pragma solidity >=0.7.0 <0.9.0;
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interface IERC20PermitDAI {
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/**
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* @notice update allowance with a signed permit
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* @param holder Token owner's address (Authorizer)
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* @param spender Spender's address
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* @param nonce The permit nonce
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* @param expiry The time at which this expires (unix time)
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* @param allowed Whether the spender is allowed or disallowed from spending
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* @param v v of the signature
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* @param r r of the signature
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* @param s s of the signature
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*/
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function permit(
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address holder,
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address spender,
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uint256 nonce,
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uint256 expiry,
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bool allowed,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external;
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}
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@@ -0,0 +1,22 @@
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The MIT License (MIT)
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Copyright (c) 2016-2020 zOS Global Limited
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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@@ -0,0 +1,11 @@
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## Ports from OpenZeppelin Contracts
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Files in this directory are based on the [OpenZeppelin Contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) library, and as such are licensed under the MIT License: see [LICENSE](./LICENSE).
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Most of the modifications fall under one of these categories:
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- removal of functions unused in Balancer V2 source code
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- replacement of `require` statements with the `_require` function from the `BalancerErrors.sol` contract
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- modification or addition of functionality to reduce bytecode size (see `ReentrancyGuard.sol`) or gas usage (see `EnumerableSet`, `EnumerableMap` or `SafeERC20`)
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Non-trivial modifications in this last category have associated source code comments that explain the changes and motivation.
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