Contract Name:
LiquidityProtectionSettings
Contract Source Code:
File 1 of 1 : LiquidityProtectionSettings
// File: @openzeppelin/contracts/math/SafeMath.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/AccessControl.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: solidity/contracts/utility/interfaces/IOwned.sol
pragma solidity 0.6.12;
/*
Owned contract interface
*/
interface IOwned {
// this function isn't since the compiler emits automatically generated getter functions as external
function owner() external view returns (address);
function transferOwnership(address _newOwner) external;
function acceptOwnership() external;
}
// File: solidity/contracts/converter/interfaces/IConverterAnchor.sol
pragma solidity 0.6.12;
/*
Converter Anchor interface
*/
interface IConverterAnchor is IOwned {
}
// File: solidity/contracts/token/interfaces/IERC20Token.sol
pragma solidity 0.6.12;
/*
ERC20 Standard Token interface
*/
interface IERC20Token {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address _owner) external view returns (uint256);
function allowance(address _owner, address _spender) external view returns (uint256);
function transfer(address _to, uint256 _value) external returns (bool);
function transferFrom(
address _from,
address _to,
uint256 _value
) external returns (bool);
function approve(address _spender, uint256 _value) external returns (bool);
}
// File: solidity/contracts/liquidity-protection/interfaces/ILiquidityProtectionEventsSubscriber.sol
pragma solidity 0.6.12;
/**
* @dev Liquidity protection events subscriber interface
*/
interface ILiquidityProtectionEventsSubscriber {
function onAddingLiquidity(
address provider,
IConverterAnchor poolAnchor,
IERC20Token reserveToken,
uint256 poolAmount,
uint256 reserveAmount
) external;
function onRemovingLiquidity(
uint256 id,
address provider,
IConverterAnchor poolAnchor,
IERC20Token reserveToken,
uint256 poolAmount,
uint256 reserveAmount
) external;
}
// File: solidity/contracts/liquidity-protection/interfaces/ILiquidityProtectionSettings.sol
pragma solidity 0.6.12;
/*
Liquidity Protection Store Settings interface
*/
interface ILiquidityProtectionSettings {
function isPoolWhitelisted(IConverterAnchor poolAnchor) external view returns (bool);
function poolWhitelist() external view returns (address[] memory);
function subscribers() external view returns (address[] memory);
function isPoolSupported(IConverterAnchor poolAnchor) external view returns (bool);
function minNetworkTokenLiquidityForMinting() external view returns (uint256);
function defaultNetworkTokenMintingLimit() external view returns (uint256);
function networkTokenMintingLimits(IConverterAnchor poolAnchor) external view returns (uint256);
function addLiquidityDisabled(IConverterAnchor poolAnchor, IERC20Token reserveToken) external view returns (bool);
function minProtectionDelay() external view returns (uint256);
function maxProtectionDelay() external view returns (uint256);
function minNetworkCompensation() external view returns (uint256);
function lockDuration() external view returns (uint256);
function averageRateMaxDeviation() external view returns (uint32);
}
// File: solidity/contracts/converter/interfaces/IConverter.sol
pragma solidity 0.6.12;
/*
Converter interface
*/
interface IConverter is IOwned {
function converterType() external pure returns (uint16);
function anchor() external view returns (IConverterAnchor);
function isActive() external view returns (bool);
function targetAmountAndFee(
IERC20Token _sourceToken,
IERC20Token _targetToken,
uint256 _amount
) external view returns (uint256, uint256);
function convert(
IERC20Token _sourceToken,
IERC20Token _targetToken,
uint256 _amount,
address _trader,
address payable _beneficiary
) external payable returns (uint256);
function conversionFee() external view returns (uint32);
function maxConversionFee() external view returns (uint32);
function reserveBalance(IERC20Token _reserveToken) external view returns (uint256);
receive() external payable;
function transferAnchorOwnership(address _newOwner) external;
function acceptAnchorOwnership() external;
function setConversionFee(uint32 _conversionFee) external;
function withdrawTokens(
IERC20Token _token,
address _to,
uint256 _amount
) external;
function withdrawETH(address payable _to) external;
function addReserve(IERC20Token _token, uint32 _ratio) external;
// deprecated, backward compatibility
function token() external view returns (IConverterAnchor);
function transferTokenOwnership(address _newOwner) external;
function acceptTokenOwnership() external;
function connectors(IERC20Token _address)
external
view
returns (
uint256,
uint32,
bool,
bool,
bool
);
function getConnectorBalance(IERC20Token _connectorToken) external view returns (uint256);
function connectorTokens(uint256 _index) external view returns (IERC20Token);
function connectorTokenCount() external view returns (uint16);
/**
* @dev triggered when the converter is activated
*
* @param _type converter type
* @param _anchor converter anchor
* @param _activated true if the converter was activated, false if it was deactivated
*/
event Activation(uint16 indexed _type, IConverterAnchor indexed _anchor, bool indexed _activated);
/**
* @dev triggered when a conversion between two tokens occurs
*
* @param _fromToken source ERC20 token
* @param _toToken target ERC20 token
* @param _trader wallet that initiated the trade
* @param _amount input amount in units of the source token
* @param _return output amount minus conversion fee in units of the target token
* @param _conversionFee conversion fee in units of the target token
*/
event Conversion(
IERC20Token indexed _fromToken,
IERC20Token indexed _toToken,
address indexed _trader,
uint256 _amount,
uint256 _return,
int256 _conversionFee
);
/**
* @dev triggered when the rate between two tokens in the converter changes
* note that the event might be dispatched for rate updates between any two tokens in the converter
*
* @param _token1 address of the first token
* @param _token2 address of the second token
* @param _rateN rate of 1 unit of `_token1` in `_token2` (numerator)
* @param _rateD rate of 1 unit of `_token1` in `_token2` (denominator)
*/
event TokenRateUpdate(IERC20Token indexed _token1, IERC20Token indexed _token2, uint256 _rateN, uint256 _rateD);
/**
* @dev triggered when the conversion fee is updated
*
* @param _prevFee previous fee percentage, represented in ppm
* @param _newFee new fee percentage, represented in ppm
*/
event ConversionFeeUpdate(uint32 _prevFee, uint32 _newFee);
}
// File: solidity/contracts/converter/interfaces/IConverterRegistry.sol
pragma solidity 0.6.12;
interface IConverterRegistry {
function getAnchorCount() external view returns (uint256);
function getAnchors() external view returns (address[] memory);
function getAnchor(uint256 _index) external view returns (IConverterAnchor);
function isAnchor(address _value) external view returns (bool);
function getLiquidityPoolCount() external view returns (uint256);
function getLiquidityPools() external view returns (address[] memory);
function getLiquidityPool(uint256 _index) external view returns (IConverterAnchor);
function isLiquidityPool(address _value) external view returns (bool);
function getConvertibleTokenCount() external view returns (uint256);
function getConvertibleTokens() external view returns (address[] memory);
function getConvertibleToken(uint256 _index) external view returns (IERC20Token);
function isConvertibleToken(address _value) external view returns (bool);
function getConvertibleTokenAnchorCount(IERC20Token _convertibleToken) external view returns (uint256);
function getConvertibleTokenAnchors(IERC20Token _convertibleToken) external view returns (address[] memory);
function getConvertibleTokenAnchor(IERC20Token _convertibleToken, uint256 _index)
external
view
returns (IConverterAnchor);
function isConvertibleTokenAnchor(IERC20Token _convertibleToken, address _value) external view returns (bool);
}
// File: solidity/contracts/utility/Owned.sol
pragma solidity 0.6.12;
/**
* @dev This contract provides support and utilities for contract ownership.
*/
contract Owned is IOwned {
address public override owner;
address public newOwner;
/**
* @dev triggered when the owner is updated
*
* @param _prevOwner previous owner
* @param _newOwner new owner
*/
event OwnerUpdate(address indexed _prevOwner, address indexed _newOwner);
/**
* @dev initializes a new Owned instance
*/
constructor() public {
owner = msg.sender;
}
// allows execution by the owner only
modifier ownerOnly {
_ownerOnly();
_;
}
// error message binary size optimization
function _ownerOnly() internal view {
require(msg.sender == owner, "ERR_ACCESS_DENIED");
}
/**
* @dev allows transferring the contract ownership
* the new owner still needs to accept the transfer
* can only be called by the contract owner
*
* @param _newOwner new contract owner
*/
function transferOwnership(address _newOwner) public override ownerOnly {
require(_newOwner != owner, "ERR_SAME_OWNER");
newOwner = _newOwner;
}
/**
* @dev used by a new owner to accept an ownership transfer
*/
function acceptOwnership() public override {
require(msg.sender == newOwner, "ERR_ACCESS_DENIED");
emit OwnerUpdate(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// File: solidity/contracts/utility/Utils.sol
pragma solidity 0.6.12;
/**
* @dev Utilities & Common Modifiers
*/
contract Utils {
// verifies that a value is greater than zero
modifier greaterThanZero(uint256 _value) {
_greaterThanZero(_value);
_;
}
// error message binary size optimization
function _greaterThanZero(uint256 _value) internal pure {
require(_value > 0, "ERR_ZERO_VALUE");
}
// validates an address - currently only checks that it isn't null
modifier validAddress(address _address) {
_validAddress(_address);
_;
}
// error message binary size optimization
function _validAddress(address _address) internal pure {
require(_address != address(0), "ERR_INVALID_ADDRESS");
}
// verifies that the address is different than this contract address
modifier notThis(address _address) {
_notThis(_address);
_;
}
// error message binary size optimization
function _notThis(address _address) internal view {
require(_address != address(this), "ERR_ADDRESS_IS_SELF");
}
// validates an external address - currently only checks that it isn't null or this
modifier validExternalAddress(address _address) {
_validExternalAddress(_address);
_;
}
// error message binary size optimization
function _validExternalAddress(address _address) internal view {
require(_address != address(0) && _address != address(this), "ERR_INVALID_EXTERNAL_ADDRESS");
}
}
// File: solidity/contracts/utility/interfaces/IContractRegistry.sol
pragma solidity 0.6.12;
/*
Contract Registry interface
*/
interface IContractRegistry {
function addressOf(bytes32 _contractName) external view returns (address);
}
// File: solidity/contracts/utility/ContractRegistryClient.sol
pragma solidity 0.6.12;
/**
* @dev This is the base contract for ContractRegistry clients.
*/
contract ContractRegistryClient is Owned, Utils {
bytes32 internal constant CONTRACT_REGISTRY = "ContractRegistry";
bytes32 internal constant BANCOR_NETWORK = "BancorNetwork";
bytes32 internal constant BANCOR_FORMULA = "BancorFormula";
bytes32 internal constant CONVERTER_FACTORY = "ConverterFactory";
bytes32 internal constant CONVERSION_PATH_FINDER = "ConversionPathFinder";
bytes32 internal constant CONVERTER_UPGRADER = "BancorConverterUpgrader";
bytes32 internal constant CONVERTER_REGISTRY = "BancorConverterRegistry";
bytes32 internal constant CONVERTER_REGISTRY_DATA = "BancorConverterRegistryData";
bytes32 internal constant BNT_TOKEN = "BNTToken";
bytes32 internal constant BANCOR_X = "BancorX";
bytes32 internal constant BANCOR_X_UPGRADER = "BancorXUpgrader";
bytes32 internal constant LIQUIDITY_PROTECTION = "LiquidityProtection";
IContractRegistry public registry; // address of the current contract-registry
IContractRegistry public prevRegistry; // address of the previous contract-registry
bool public onlyOwnerCanUpdateRegistry; // only an owner can update the contract-registry
/**
* @dev verifies that the caller is mapped to the given contract name
*
* @param _contractName contract name
*/
modifier only(bytes32 _contractName) {
_only(_contractName);
_;
}
// error message binary size optimization
function _only(bytes32 _contractName) internal view {
require(msg.sender == addressOf(_contractName), "ERR_ACCESS_DENIED");
}
/**
* @dev initializes a new ContractRegistryClient instance
*
* @param _registry address of a contract-registry contract
*/
constructor(IContractRegistry _registry) internal validAddress(address(_registry)) {
registry = IContractRegistry(_registry);
prevRegistry = IContractRegistry(_registry);
}
/**
* @dev updates to the new contract-registry
*/
function updateRegistry() public {
// verify that this function is permitted
require(msg.sender == owner || !onlyOwnerCanUpdateRegistry, "ERR_ACCESS_DENIED");
// get the new contract-registry
IContractRegistry newRegistry = IContractRegistry(addressOf(CONTRACT_REGISTRY));
// verify that the new contract-registry is different and not zero
require(newRegistry != registry && address(newRegistry) != address(0), "ERR_INVALID_REGISTRY");
// verify that the new contract-registry is pointing to a non-zero contract-registry
require(newRegistry.addressOf(CONTRACT_REGISTRY) != address(0), "ERR_INVALID_REGISTRY");
// save a backup of the current contract-registry before replacing it
prevRegistry = registry;
// replace the current contract-registry with the new contract-registry
registry = newRegistry;
}
/**
* @dev restores the previous contract-registry
*/
function restoreRegistry() public ownerOnly {
// restore the previous contract-registry
registry = prevRegistry;
}
/**
* @dev restricts the permission to update the contract-registry
*
* @param _onlyOwnerCanUpdateRegistry indicates whether or not permission is restricted to owner only
*/
function restrictRegistryUpdate(bool _onlyOwnerCanUpdateRegistry) public ownerOnly {
// change the permission to update the contract-registry
onlyOwnerCanUpdateRegistry = _onlyOwnerCanUpdateRegistry;
}
/**
* @dev returns the address associated with the given contract name
*
* @param _contractName contract name
*
* @return contract address
*/
function addressOf(bytes32 _contractName) internal view returns (address) {
return registry.addressOf(_contractName);
}
}
// File: solidity/contracts/liquidity-protection/LiquidityProtectionSettings.sol
pragma solidity 0.6.12;
/**
* @dev Liquidity Protection Settings contract
*/
contract LiquidityProtectionSettings is ILiquidityProtectionSettings, AccessControl, ContractRegistryClient {
using SafeMath for uint256;
using EnumerableSet for EnumerableSet.AddressSet;
// the owner role is used to update the settings
bytes32 public constant ROLE_OWNER = keccak256("ROLE_OWNER");
uint32 private constant PPM_RESOLUTION = 1000000;
IERC20Token private immutable _networkToken;
// list of whitelisted pools
EnumerableSet.AddressSet private _poolWhitelist;
// list of subscribers
EnumerableSet.AddressSet private _subscribers;
// network token minting limits
uint256 private _minNetworkTokenLiquidityForMinting = 1000e18;
uint256 private _defaultNetworkTokenMintingLimit = 20000e18;
mapping(IConverterAnchor => uint256) private _networkTokenMintingLimits;
// permission of adding liquidity for a given reserve on a given pool
mapping(IConverterAnchor => mapping(IERC20Token => bool)) private _addLiquidityDisabled;
// number of seconds until any protection is in effect
uint256 private _minProtectionDelay = 30 days;
// number of seconds until full protection is in effect
uint256 private _maxProtectionDelay = 100 days;
// minimum amount of network tokens that the system can mint as compensation for base token losses
uint256 private _minNetworkCompensation = 1e16; // = 0.01 network tokens
// number of seconds from liquidation to full network token release
uint256 private _lockDuration = 24 hours;
// maximum deviation of the average rate from the spot rate
uint32 private _averageRateMaxDeviation = 5000; // PPM units
/**
* @dev triggered when the pool whitelist is updated
*
* @param poolAnchor pool anchor
* @param added true if the pool was added to the whitelist, false if it was removed
*/
event PoolWhitelistUpdated(IConverterAnchor indexed poolAnchor, bool added);
/**
* @dev triggered when a subscriber is added or removed
*
* @param subscriber subscriber
* @param added true if the subscriber was added, false if it was removed
*/
event SubscriberUpdated(ILiquidityProtectionEventsSubscriber indexed subscriber, bool added);
/**
* @dev triggered when the minimum amount of network token liquidity to allow minting is updated
*
* @param prevMin previous minimum amount of network token liquidity for minting
* @param newMin new minimum amount of network token liquidity for minting
*/
event MinNetworkTokenLiquidityForMintingUpdated(uint256 prevMin, uint256 newMin);
/**
* @dev triggered when the default network token minting limit is updated
*
* @param prevDefault previous default network token minting limit
* @param newDefault new default network token minting limit
*/
event DefaultNetworkTokenMintingLimitUpdated(uint256 prevDefault, uint256 newDefault);
/**
* @dev triggered when a pool network token minting limit is updated
*
* @param poolAnchor pool anchor
* @param prevLimit previous limit
* @param newLimit new limit
*/
event NetworkTokenMintingLimitUpdated(IConverterAnchor indexed poolAnchor, uint256 prevLimit, uint256 newLimit);
/**
* @dev triggered when the protection delays are updated
*
* @param prevMinProtectionDelay previous seconds until the protection starts
* @param newMinProtectionDelay new seconds until the protection starts
* @param prevMaxProtectionDelay previous seconds until full protection
* @param newMaxProtectionDelay new seconds until full protection
*/
event ProtectionDelaysUpdated(
uint256 prevMinProtectionDelay,
uint256 newMinProtectionDelay,
uint256 prevMaxProtectionDelay,
uint256 newMaxProtectionDelay
);
/**
* @dev triggered when the minimum network token compensation is updated
*
* @param prevMinNetworkCompensation previous minimum network token compensation
* @param newMinNetworkCompensation new minimum network token compensation
*/
event MinNetworkCompensationUpdated(uint256 prevMinNetworkCompensation, uint256 newMinNetworkCompensation);
/**
* @dev triggered when the network token lock duration is updated
*
* @param prevLockDuration previous network token lock duration, in seconds
* @param newLockDuration new network token lock duration, in seconds
*/
event LockDurationUpdated(uint256 prevLockDuration, uint256 newLockDuration);
/**
* @dev triggered when the maximum deviation of the average rate from the spot rate is updated
*
* @param prevAverageRateMaxDeviation previous maximum deviation of the average rate from the spot rate
* @param newAverageRateMaxDeviation new maximum deviation of the average rate from the spot rate
*/
event AverageRateMaxDeviationUpdated(uint32 prevAverageRateMaxDeviation, uint32 newAverageRateMaxDeviation);
/**
* @dev triggered when adding liquidity is disabled or enabled for a given reserve on a given pool
*
* @param poolAnchor pool anchor
* @param reserveToken reserve token
* @param disabled true if disabled, false otherwise
*/
event AddLiquidityDisabled(IConverterAnchor indexed poolAnchor, IERC20Token indexed reserveToken, bool disabled);
/**
* @dev initializes a new LiquidityProtectionSettings contract
*
* @param registry contract registry
* @param token the network token
*/
constructor(IERC20Token token, IContractRegistry registry)
public
ContractRegistryClient(registry)
validAddress(address(token))
notThis(address(token))
{
// set up administrative roles.
_setRoleAdmin(ROLE_OWNER, ROLE_OWNER);
// allow the deployer to initially govern the contract.
_setupRole(ROLE_OWNER, msg.sender);
_networkToken = token;
}
modifier onlyOwner() {
_onlyOwner();
_;
}
// error message binary size optimization
function _onlyOwner() internal view {
require(hasRole(ROLE_OWNER, msg.sender), "ERR_ACCESS_DENIED");
}
// ensures that the portion is valid
modifier validPortion(uint32 portion) {
_validPortion(portion);
_;
}
// error message binary size optimization
function _validPortion(uint32 portion) internal pure {
require(portion > 0 && portion <= PPM_RESOLUTION, "ERR_INVALID_PORTION");
}
/**
* @dev returns the network token
*
* @return the network token
*/
function networkToken() external view returns (IERC20Token) {
return _networkToken;
}
/**
* @dev returns the minimum network token liquidity for minting
*
* @return the minimum network token liquidity for minting
*/
function minNetworkTokenLiquidityForMinting() external view override returns (uint256) {
return _minNetworkTokenLiquidityForMinting;
}
/**
* @dev returns the default network token minting limit
*
* @return the default network token minting limit
*/
function defaultNetworkTokenMintingLimit() external view override returns (uint256) {
return _defaultNetworkTokenMintingLimit;
}
/**
* @dev returns the network token minting limit for a given pool
*
* @param poolAnchor pool anchor
* @return the network token minting limit for a given pool
*/
function networkTokenMintingLimits(IConverterAnchor poolAnchor) external view override returns (uint256) {
return _networkTokenMintingLimits[poolAnchor];
}
/**
* @dev returns the permission of adding liquidity for a given reserve on a given pool
*
* @param poolAnchor pool anchor
* @param reserveToken reserve token
* @return true if adding liquidity is disabled, false otherwise
*/
function addLiquidityDisabled(IConverterAnchor poolAnchor, IERC20Token reserveToken)
external
view
override
returns (bool)
{
return _addLiquidityDisabled[poolAnchor][reserveToken];
}
/**
* @dev returns the minimum number of seconds until any protection is in effect
*
* @return the minimum number of seconds until any protection is in effect
*/
function minProtectionDelay() external view override returns (uint256) {
return _minProtectionDelay;
}
/**
* @dev returns the maximum number of seconds until full protection is in effect
*
* @return the maximum number of seconds until full protection is in effect
*/
function maxProtectionDelay() external view override returns (uint256) {
return _maxProtectionDelay;
}
/**
* @dev returns the minimum amount of network tokens that the system can mint as compensation for base token losses
*
* @return the minimum amount of network tokens that the system can mint as compensation for base token losses
*/
function minNetworkCompensation() external view override returns (uint256) {
return _minNetworkCompensation;
}
/**
* @dev returns the number of seconds from liquidation to full network token release
*
* @return the number of seconds from liquidation to full network token release
*/
function lockDuration() external view override returns (uint256) {
return _lockDuration;
}
/**
* @dev returns the maximum deviation of the average rate from the spot rate
*
* @return the maximum deviation of the average rate from the spot rate
*/
function averageRateMaxDeviation() external view override returns (uint32) {
return _averageRateMaxDeviation;
}
/**
* @dev adds a pool to the whitelist
* can only be called by the contract owner
*
* @param poolAnchor pool anchor
*/
function addPoolToWhitelist(IConverterAnchor poolAnchor)
external
onlyOwner
validAddress(address(poolAnchor))
notThis(address(poolAnchor))
{
require(_poolWhitelist.add(address(poolAnchor)), "ERR_POOL_ALREADY_WHITELISTED");
emit PoolWhitelistUpdated(poolAnchor, true);
}
/**
* @dev removes a pool from the whitelist
* can only be called by the contract owner
*
* @param poolAnchor pool anchor
*/
function removePoolFromWhitelist(IConverterAnchor poolAnchor)
external
onlyOwner
validAddress(address(poolAnchor))
notThis(address(poolAnchor))
{
require(_poolWhitelist.remove(address(poolAnchor)), "ERR_POOL_NOT_WHITELISTED");
emit PoolWhitelistUpdated(poolAnchor, false);
}
/**
* @dev checks whether a given pool is whitelisted
*
* @param poolAnchor pool anchor
* @return true if the given pool is whitelisted, false otherwise
*/
function isPoolWhitelisted(IConverterAnchor poolAnchor) external view override returns (bool) {
return _poolWhitelist.contains(address(poolAnchor));
}
/**
* @dev returns pools whitelist
*
* @return pools whitelist
*/
function poolWhitelist() external view override returns (address[] memory) {
uint256 length = _poolWhitelist.length();
address[] memory list = new address[](length);
for (uint256 i = 0; i < length; i++) {
list[i] = _poolWhitelist.at(i);
}
return list;
}
/**
* @dev adds a subscriber
* can only be called by the contract owner
*
* @param subscriber subscriber address
*/
function addSubscriber(ILiquidityProtectionEventsSubscriber subscriber)
external
onlyOwner
validAddress(address(subscriber))
notThis(address(subscriber))
{
require(_subscribers.add(address(subscriber)), "ERR_SUBSCRIBER_ALREADY_SET");
emit SubscriberUpdated(subscriber, true);
}
/**
* @dev removes a subscriber
* can only be called by the contract owner
*
* @param subscriber subscriber address
*/
function removeSubscriber(ILiquidityProtectionEventsSubscriber subscriber)
external
onlyOwner
validAddress(address(subscriber))
notThis(address(subscriber))
{
require(_subscribers.remove(address(subscriber)), "ERR_INVALID_SUBSCRIBER");
emit SubscriberUpdated(subscriber, false);
}
/**
* @dev returns subscribers list
*
* @return subscribers list
*/
function subscribers() external view override returns (address[] memory) {
uint256 length = _subscribers.length();
address[] memory list = new address[](length);
for (uint256 i = 0; i < length; i++) {
list[i] = _subscribers.at(i);
}
return list;
}
/**
* @dev updates the minimum amount of network token liquidity to allow minting
* can only be called by the contract owner
*
* @param amount the minimum amount of network token liquidity to allow minting
*/
function setMinNetworkTokenLiquidityForMinting(uint256 amount) external onlyOwner() {
emit MinNetworkTokenLiquidityForMintingUpdated(_minNetworkTokenLiquidityForMinting, amount);
_minNetworkTokenLiquidityForMinting = amount;
}
/**
* @dev updates the default amount of network token that the system can mint into each pool
* can only be called by the contract owner
*
* @param amount the default amount of network token that the system can mint into each pool
*/
function setDefaultNetworkTokenMintingLimit(uint256 amount) external onlyOwner() {
emit DefaultNetworkTokenMintingLimitUpdated(_defaultNetworkTokenMintingLimit, amount);
_defaultNetworkTokenMintingLimit = amount;
}
/**
* @dev updates the amount of network tokens that the system can mint into a specific pool
* can only be called by the contract owner
*
* @param poolAnchor pool anchor
* @param amount the amount of network tokens that the system can mint into a specific pool
*/
function setNetworkTokenMintingLimit(IConverterAnchor poolAnchor, uint256 amount)
external
onlyOwner()
validAddress(address(poolAnchor))
{
emit NetworkTokenMintingLimitUpdated(poolAnchor, _networkTokenMintingLimits[poolAnchor], amount);
_networkTokenMintingLimits[poolAnchor] = amount;
}
/**
* @dev updates the protection delays
* can only be called by the contract owner
*
* @param minDelay seconds until the protection starts
* @param maxDelay seconds until full protection
*/
function setProtectionDelays(uint256 minDelay, uint256 maxDelay) external onlyOwner() {
require(minDelay < maxDelay, "ERR_INVALID_PROTECTION_DELAY");
emit ProtectionDelaysUpdated(_minProtectionDelay, minDelay, _maxProtectionDelay, maxDelay);
_minProtectionDelay = minDelay;
_maxProtectionDelay = maxDelay;
}
/**
* @dev updates the minimum amount of network token compensation
* can only be called by the contract owner
*
* @param amount the minimum amount of network token compensation
*/
function setMinNetworkCompensation(uint256 amount) external onlyOwner() {
emit MinNetworkCompensationUpdated(_minNetworkCompensation, amount);
_minNetworkCompensation = amount;
}
/**
* @dev updates the network token lock duration
* can only be called by the contract owner
*
* @param duration network token lock duration, in seconds
*/
function setLockDuration(uint256 duration) external onlyOwner() {
emit LockDurationUpdated(_lockDuration, duration);
_lockDuration = duration;
}
/**
* @dev sets the maximum deviation of the average rate from the spot rate
* can only be called by the contract owner
*
* @param deviation maximum deviation of the average rate from the spot rate
*/
function setAverageRateMaxDeviation(uint32 deviation) external onlyOwner() validPortion(deviation) {
emit AverageRateMaxDeviationUpdated(_averageRateMaxDeviation, deviation);
_averageRateMaxDeviation = deviation;
}
/**
* @dev disables or enables adding liquidity for a given reserve on a given pool
* can only be called by the contract owner
*
* @param poolAnchor pool anchor
* @param reserveToken reserve token
* @param disable true to disable, false otherwise
*/
function disableAddLiquidity(
IConverterAnchor poolAnchor,
IERC20Token reserveToken,
bool disable
) external onlyOwner() {
emit AddLiquidityDisabled(poolAnchor, reserveToken, disable);
_addLiquidityDisabled[poolAnchor][reserveToken] = disable;
}
/**
* @dev checks if protection is supported for the given pool
* only standard pools are supported (2 reserves, 50%/50% weights)
* note that the pool should still be whitelisted
*
* @param poolAnchor anchor of the pool
* @return true if the pool is supported, false otherwise
*/
function isPoolSupported(IConverterAnchor poolAnchor) external view override returns (bool) {
IERC20Token tmpNetworkToken = _networkToken;
// verify that the pool exists in the registry
IConverterRegistry converterRegistry = IConverterRegistry(addressOf(CONVERTER_REGISTRY));
require(converterRegistry.isAnchor(address(poolAnchor)), "ERR_INVALID_ANCHOR");
// get the converter
IConverter converter = IConverter(payable(poolAnchor.owner()));
// verify that the converter has 2 reserves
if (converter.connectorTokenCount() != 2) {
return false;
}
// verify that one of the reserves is the network token
IERC20Token reserve0Token = converter.connectorTokens(0);
IERC20Token reserve1Token = converter.connectorTokens(1);
if (reserve0Token != tmpNetworkToken && reserve1Token != tmpNetworkToken) {
return false;
}
// verify that the reserve weights are exactly 50%/50%
if (
converterReserveWeight(converter, reserve0Token) != PPM_RESOLUTION / 2 ||
converterReserveWeight(converter, reserve1Token) != PPM_RESOLUTION / 2
) {
return false;
}
return true;
}
// utility to get the reserve weight (including from older converters that don't support the new converterReserveWeight function)
function converterReserveWeight(IConverter converter, IERC20Token reserveToken) private view returns (uint32) {
(, uint32 weight, , , ) = converter.connectors(reserveToken);
return weight;
}
}