// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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");
(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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IKeyManager.sol";
import "IAggKeyNonceConsumer.sol";
import "Shared.sol";
/**
* @title AggKeyNonceConsumer contract
* @notice Manages the reference to the KeyManager contract. The address
* is set in the constructor and can only be updated with a valid
* signature validated by the current KeyManager contract. This shall
* be done if the KeyManager contract is updated.
*/
abstract contract AggKeyNonceConsumer is Shared, IAggKeyNonceConsumer {
/// @dev The KeyManager used to checks sigs used in functions here
IKeyManager private _keyManager;
constructor(IKeyManager keyManager) nzAddr(address(keyManager)) {
_keyManager = keyManager;
}
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Update KeyManager reference. Used if KeyManager contract is updated
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param keyManager New KeyManager's address
* @param omitChecks Allow the omission of the extra checks in a special case
*/
function updateKeyManager(
SigData calldata sigData,
IKeyManager keyManager,
bool omitChecks
)
external
override
nzAddr(address(keyManager))
consumesKeyNonce(sigData, keccak256(abi.encode(this.updateKeyManager.selector, keyManager, omitChecks)))
{
// Check that the new KeyManager is a contract
require(address(keyManager).code.length > 0);
// Allow the child to check compatibility with the new KeyManager
_checkUpdateKeyManager(keyManager, omitChecks);
_keyManager = keyManager;
emit UpdatedKeyManager(address(keyManager));
}
/// @dev This will be called when upgrading to a new KeyManager. This allows the child's contract
/// to check its compatibility with the new KeyManager. This is to prevent the contract from
// getting bricked. There is no good way to enforce the implementation of consumeKeyNonce().
function _checkUpdateKeyManager(IKeyManager keyManager, bool omitChecks) internal view virtual;
//////////////////////////////////////////////////////////////
// //
// Getters //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Get the KeyManager address/interface that's used to validate sigs
* @return The KeyManager (IKeyManager)
*/
function getKeyManager() public view override returns (IKeyManager) {
return _keyManager;
}
//////////////////////////////////////////////////////////////
// //
// Modifiers //
// //
//////////////////////////////////////////////////////////////
/// @dev Calls consumeKeyNonce in _keyManager
modifier consumesKeyNonce(SigData calldata sigData, bytes32 contractMsgHash) {
getKeyManager().consumeKeyNonce(sigData, contractMsgHash);
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IERC20Lite.sol";
/**
* @title Deposit contract
* @notice Creates a contract with a known address and withdraws tokens from it.
* After deployment, the Vault will call fetch() to withdraw tokens.
* @dev Any change in this contract, including comments, will affect the final
* bytecode and therefore will affect the create2 derived addresses.
* Do NOT modify unless the consequences of doing so are fully understood.
*/
contract Deposit {
address payable private immutable vault;
/**
* @notice Upon deployment it fetches the tokens (native or ERC20) to the Vault.
* @param token The address of the token to fetch
*/
constructor(address token) {
vault = payable(msg.sender);
// Slightly cheaper to use msg.sender instead of Vault.
if (token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) {
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success);
} else {
// IERC20Lite.transfer doesn't have a return bool to avoid reverts on non-standard ERC20s
IERC20Lite(token).transfer(msg.sender, IERC20Lite(token).balanceOf(address(this)));
}
}
/**
* @notice Allows the Vault to fetch ERC20 tokens from this contract.
* @param token The address of the token to fetch
*/
function fetch(address token) external {
require(msg.sender == vault);
// IERC20Lite.transfer doesn't have a return bool to avoid reverts on non-standard ERC20s
IERC20Lite(token).transfer(msg.sender, IERC20Lite(token).balanceOf(address(this)));
}
/// @notice Receives native tokens, emits an event and sends them to the Vault. Note that this
// requires the sender to forward some more gas than for a simple transfer.
receive() external payable {
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = vault.call{value: address(this).balance}("");
require(success);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IGovernanceCommunityGuarded.sol";
import "AggKeyNonceConsumer.sol";
import "Shared.sol";
/**
* @title GovernanceCommunityGuarded contract
* @notice Allows the governor to perform certain actions for the procotol's safety in
* case of emergency. The aim is to allow the governor to suspend execution of
* critical functions.
* Also, it allows the CommunityKey to safeguard certain functions so the
* governor can execute them iff the communityKey allows it.
*/
abstract contract GovernanceCommunityGuarded is Shared, IGovernanceCommunityGuarded {
/// @dev Community Guard Disabled
bool private _communityGuardDisabled;
/// @dev Whether execution is suspended
bool private _suspended = false;
/**
* @notice Get the governor's address. The contracts inheriting this (StateChainGateway and Vault)
* get the governor's address from the KeyManager through the AggKeyNonceConsumer's
* inheritance. Therefore, the implementation of this function must be left
* to the children. This is not implemented as a virtual onlyGovernor modifier to force
* the children to implement this function - virtual modifiers don't enforce that.
* @return The governor's address
*/
function _getGovernor() internal view virtual returns (address);
/**
* @notice Get the community's address. The contracts inheriting this (StateChainGateway and Vault)
* get the community's address from the KeyManager through the AggKeyNonceConsumer's
* inheritance. Therefore, the implementation of this function must be left
* to the children. This is not implemented as a virtual onlyCommunityKey modifier to force
* the children to implement this function - virtual modifiers don't enforce that.
* @return The community's address
*/
function _getCommunityKey() internal view virtual returns (address);
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Enable Community Guard
*/
function enableCommunityGuard() external override onlyCommunityKey onlyCommunityGuardDisabled {
_communityGuardDisabled = false;
emit CommunityGuardDisabled(false);
}
/**
* @notice Disable Community Guard
*/
function disableCommunityGuard() external override onlyCommunityKey onlyCommunityGuardEnabled {
_communityGuardDisabled = true;
emit CommunityGuardDisabled(true);
}
/**
* @notice Can be used to suspend contract execution - only executable by
* governance and only to be used in case of emergency.
*/
function suspend() external override onlyGovernor onlyNotSuspended {
_suspended = true;
emit Suspended(true);
}
/**
* @notice Resume contract execution
*/
function resume() external override onlyGovernor onlySuspended {
_suspended = false;
emit Suspended(false);
}
//////////////////////////////////////////////////////////////
// //
// Getters //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Get the Community Key
* @return The CommunityKey
*/
function getCommunityKey() external view override returns (address) {
return _getCommunityKey();
}
/**
* @notice Get the Community Guard state
* @return The Community Guard state
*/
function getCommunityGuardDisabled() external view override returns (bool) {
return _communityGuardDisabled;
}
/**
* @notice Get suspended state
* @return The suspended state
*/
function getSuspendedState() external view override returns (bool) {
return _suspended;
}
/**
* @notice Get governor address
* @return The governor address
*/
function getGovernor() external view override returns (address) {
return _getGovernor();
}
//////////////////////////////////////////////////////////////
// //
// Modifiers //
// //
//////////////////////////////////////////////////////////////
/// @dev Check that the caller is the Community Key address.
modifier onlyCommunityKey() {
require(msg.sender == _getCommunityKey(), "Governance: not Community Key");
_;
}
/// @dev Check that community has disabled the community guard.
modifier onlyCommunityGuardDisabled() {
require(_communityGuardDisabled, "Governance: community guard enabled");
_;
}
/// @dev Check that community has disabled the community guard.
modifier onlyCommunityGuardEnabled() {
require(!_communityGuardDisabled, "Governance: community guard disabled");
_;
}
/// @notice Ensure that the caller is the governor address. Calls the getGovernor
/// function which is implemented by the children.
modifier onlyGovernor() {
require(msg.sender == _getGovernor(), "Governance: not governor");
_;
}
// @notice Check execution is suspended
modifier onlySuspended() {
require(_suspended, "Governance: not suspended");
_;
}
// @notice Check execution is not suspended
modifier onlyNotSuspended() {
require(!_suspended, "Governance: suspended");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IShared.sol";
import "IKeyManager.sol";
/**
* @title AggKeyNonceConsumer interface
*/
interface IAggKeyNonceConsumer is IShared {
event UpdatedKeyManager(address keyManager);
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Update KeyManager reference. Used if KeyManager contract is updated
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param keyManager New KeyManager's address
* @param omitChecks Allow the omission of the extra checks in a special case
*/
function updateKeyManager(SigData calldata sigData, IKeyManager keyManager, bool omitChecks) external;
//////////////////////////////////////////////////////////////
// //
// Getters //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Get the KeyManager address/interface that's used to validate sigs
* @return The KeyManager (IKeyManager)
*/
function getKeyManager() external view returns (IKeyManager);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title CF Receiver interface
* @dev The ICFReceiver interface is the interface required to receive tokens and
* cross-chain calls from the Chainflip Protocol.
*/
interface ICFReceiver {
/**
* @notice Receiver of a cross-chain swap and call made by the Chainflip Protocol.
* @param srcChain The source chain according to the Chainflip Protocol's nomenclature.
* @param srcAddress Bytes containing the source address on the source chain.
* @param message The message sent on the source chain. This is a general purpose message.
* @param token Address of the token received. _NATIVE_ADDR if it's native tokens.
* @param amount Amount of tokens received. This will match msg.value for native tokens.
*/
function cfReceive(
uint32 srcChain,
bytes calldata srcAddress,
bytes calldata message,
address token,
uint256 amount
) external payable;
/**
* @notice Receiver of a cross-chain call made by the Chainflip Protocol.
* @param srcChain The source chain according to the Chainflip Protocol's nomenclature.
* @param srcAddress Bytes containing the source address on the source chain.
* @param message The message sent on the source chain. This is a general purpose message.
*/
function cfReceivexCall(uint32 srcChain, bytes calldata srcAddress, bytes calldata message) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC20 Lite Interface
* @notice The interface for functions ERC20Lite implements. This is intended to
* be used only in the Deposit contract.
* @dev Any change in this contract, including comments, will affect the final
* bytecode and therefore will affect the create2 derived addresses.
* Do NOT modify unless the consequences of doing so are fully understood.
*/
interface IERC20Lite {
/// @dev Removed the return bool to avoid reverts on non-standard ERC20s.
function transfer(address, uint256) external;
function balanceOf(address) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IShared.sol";
/**
* @title GovernanceCommunityGuarded interface
*/
interface IGovernanceCommunityGuarded is IShared {
event CommunityGuardDisabled(bool communityGuardDisabled);
event Suspended(bool suspended);
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Enable Community Guard
*/
function enableCommunityGuard() external;
/**
* @notice Disable Community Guard
*/
function disableCommunityGuard() external;
/**
* @notice Can be used to suspend contract execution - only executable by
* governance and only to be used in case of emergency.
*/
function suspend() external;
/**
* @notice Resume contract execution
*/
function resume() external;
//////////////////////////////////////////////////////////////
// //
// Getters //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Get the Community Key
* @return The CommunityKey
*/
function getCommunityKey() external view returns (address);
/**
* @notice Get the Community Guard state
* @return The Community Guard state
*/
function getCommunityGuardDisabled() external view returns (bool);
/**
* @notice Get suspended state
* @return The suspended state
*/
function getSuspendedState() external view returns (bool);
/**
* @notice Get governor address
* @return The governor address
*/
function getGovernor() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IShared.sol";
/**
* @title KeyManager interface
* @notice The interface for functions KeyManager implements
*/
interface IKeyManager is IShared {
event AggKeySetByAggKey(Key oldAggKey, Key newAggKey);
event AggKeySetByGovKey(Key oldAggKey, Key newAggKey);
event GovKeySetByAggKey(address oldGovKey, address newGovKey);
event GovKeySetByGovKey(address oldGovKey, address newGovKey);
event CommKeySetByAggKey(address oldCommKey, address newCommKey);
event CommKeySetByCommKey(address oldCommKey, address newCommKey);
event SignatureAccepted(SigData sigData, address signer);
event GovernanceAction(bytes32 message);
//////////////////////////////////////////////////////////////
// //
// State-changing functions //
// //
//////////////////////////////////////////////////////////////
function consumeKeyNonce(SigData memory sigData, bytes32 contractMsgHash) external;
function setAggKeyWithAggKey(SigData memory sigData, Key memory newAggKey) external;
function setAggKeyWithGovKey(Key memory newAggKey) external;
function setGovKeyWithAggKey(SigData calldata sigData, address newGovKey) external;
function setGovKeyWithGovKey(address newGovKey) external;
function setCommKeyWithAggKey(SigData calldata sigData, address newCommKey) external;
function setCommKeyWithCommKey(address newCommKey) external;
function govAction(bytes32 message) external;
//////////////////////////////////////////////////////////////
// //
// Non-state-changing functions //
// //
//////////////////////////////////////////////////////////////
function getAggregateKey() external view returns (Key memory);
function getGovernanceKey() external view returns (address);
function getCommunityKey() external view returns (address);
function isNonceUsedByAggKey(uint256 nonce) external view returns (bool);
function getLastValidateTime() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IMulticall {
enum CallType {
Default,
FullTokenBalance,
FullNativeBalance,
CollectTokenBalance
}
struct Call {
CallType callType;
address target;
uint256 value;
bytes callData;
bytes payload;
}
error AlreadyRunning();
error CallFailed(uint256 callPosition, bytes reason);
function run(Call[] calldata calls, address tokenIn, uint256 amountIn) external payable;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IERC20.sol";
/**
* @title Shared interface
* @notice Holds structs needed by other interfaces
*/
interface IShared {
/**
* @dev SchnorrSECP256K1 requires that each key has a public key part (x coordinate),
* a parity for the y coordinate (0 if the y ordinate of the public key is even, 1
* if it's odd)
*/
struct Key {
uint256 pubKeyX;
uint8 pubKeyYParity;
}
/**
* @dev Contains a signature and the nonce used to create it. Also the recovered address
* to check that the signature is valid
*/
struct SigData {
uint256 sig;
uint256 nonce;
address kTimesGAddress;
}
/**
* @param token The address of the token to be transferred
* @param recipient The address of the recipient of the transfer
* @param amount The amount to transfer, in wei (uint)
*/
struct TransferParams {
address token;
address payable recipient;
uint256 amount;
}
/**
* @param swapID The unique identifier for this swap (bytes32), used for create2
* @param token The token to be transferred
*/
struct DeployFetchParams {
bytes32 swapID;
address token;
}
/**
* @param fetchContract The address of the deployed Deposit contract
* @param token The token to be transferred
*/
struct FetchParams {
address payable fetchContract;
address token;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IAggKeyNonceConsumer.sol";
import "IGovernanceCommunityGuarded.sol";
import "IMulticall.sol";
/**
* @title Vault interface
* @notice The interface for functions Vault implements
*/
interface IVault is IGovernanceCommunityGuarded, IAggKeyNonceConsumer {
event FetchedNative(address indexed sender, uint256 amount);
event TransferNativeFailed(address payable indexed recipient, uint256 amount);
event TransferTokenFailed(address payable indexed recipient, uint256 amount, address indexed token, bytes reason);
event SwapNative(
uint32 dstChain,
bytes dstAddress,
uint32 dstToken,
uint256 amount,
address indexed sender,
bytes cfParameters
);
event SwapToken(
uint32 dstChain,
bytes dstAddress,
uint32 dstToken,
address srcToken,
uint256 amount,
address indexed sender,
bytes cfParameters
);
/// @dev bytes parameters is not indexed because indexing a dynamic type for it to be filtered
/// makes it so we won't be able to decode it unless we specifically search for it. If we want
/// to filter it and decode it then we would need to have both the indexed and the non-indexed
/// version in the event. That is unnecessary.
event XCallNative(
uint32 dstChain,
bytes dstAddress,
uint32 dstToken,
uint256 amount,
address indexed sender,
bytes message,
uint256 gasAmount,
bytes cfParameters
);
event XCallToken(
uint32 dstChain,
bytes dstAddress,
uint32 dstToken,
address srcToken,
uint256 amount,
address indexed sender,
bytes message,
uint256 gasAmount,
bytes cfParameters
);
event AddGasNative(bytes32 swapID, uint256 amount);
event AddGasToken(bytes32 swapID, uint256 amount, address token);
event ExecuteActionsFailed(
address payable indexed multicallAddress,
uint256 amount,
address indexed token,
bytes reason
);
function allBatch(
SigData calldata sigData,
DeployFetchParams[] calldata deployFetchParamsArray,
FetchParams[] calldata fetchParamsArray,
TransferParams[] calldata transferParamsArray
) external;
function allBatchV2(
SigData calldata sigData,
FetchParams[] calldata fetchParamsArray,
TransferParams[] calldata transferParamsArray
) external;
//////////////////////////////////////////////////////////////
// //
// Transfers //
// //
//////////////////////////////////////////////////////////////
function transfer(SigData calldata sigData, TransferParams calldata transferParams) external;
function transferBatch(SigData calldata sigData, TransferParams[] calldata transferParamsArray) external;
//////////////////////////////////////////////////////////////
// //
// Fetch Deposits //
// //
//////////////////////////////////////////////////////////////
function deployAndFetchBatch(
SigData calldata sigData,
DeployFetchParams[] calldata deployFetchParamsArray
) external;
function fetchBatch(SigData calldata sigData, FetchParams[] calldata fetchParamsArray) external;
//////////////////////////////////////////////////////////////
// //
// Initiate cross-chain swaps (source chain) //
// //
//////////////////////////////////////////////////////////////
function xSwapToken(
uint32 dstChain,
bytes calldata dstAddress,
uint32 dstToken,
IERC20 srcToken,
uint256 amount,
bytes calldata cfParameters
) external;
function xSwapNative(
uint32 dstChain,
bytes calldata dstAddress,
uint32 dstToken,
bytes calldata cfParameters
) external payable;
//////////////////////////////////////////////////////////////
// //
// Initiate cross-chain call and swap (source chain) //
// //
//////////////////////////////////////////////////////////////
function xCallNative(
uint32 dstChain,
bytes calldata dstAddress,
uint32 dstToken,
bytes calldata message,
uint256 gasAmount,
bytes calldata cfParameters
) external payable;
function xCallToken(
uint32 dstChain,
bytes calldata dstAddress,
uint32 dstToken,
bytes calldata message,
uint256 gasAmount,
IERC20 srcToken,
uint256 amount,
bytes calldata cfParameters
) external;
//////////////////////////////////////////////////////////////
// //
// Gas topups //
// //
//////////////////////////////////////////////////////////////
function addGasNative(bytes32 swapID) external payable;
function addGasToken(bytes32 swapID, uint256 amount, IERC20 token) external;
//////////////////////////////////////////////////////////////
// //
// Execute cross-chain call and swap (dest. chain) //
// //
//////////////////////////////////////////////////////////////
function executexSwapAndCall(
SigData calldata sigData,
TransferParams calldata transferParams,
uint32 srcChain,
bytes calldata srcAddress,
bytes calldata message
) external;
//////////////////////////////////////////////////////////////
// //
// Execute cross-chain call (dest. chain) //
// //
//////////////////////////////////////////////////////////////
function executexCall(
SigData calldata sigData,
address recipient,
uint32 srcChain,
bytes calldata srcAddress,
bytes calldata message
) external;
//////////////////////////////////////////////////////////////
// //
// Auxiliary chain actions //
// //
//////////////////////////////////////////////////////////////
function executeActions(
SigData calldata sigData,
TransferParams calldata transferParams,
IMulticall.Call[] calldata calls,
uint256 gasMulticall
) external;
//////////////////////////////////////////////////////////////
// //
// Governance //
// //
//////////////////////////////////////////////////////////////
function govWithdraw(address[] calldata tokens) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "IERC20.sol";
import "draft-IERC20Permit.sol";
import "Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "IShared.sol";
/**
* @title Shared contract
* @notice Holds constants and modifiers that are used in multiple contracts
* @dev It would be nice if this could be a library, but modifiers can't be exported :(
*/
abstract contract Shared is IShared {
/// @dev The address used to indicate whether transfer should send native or a token
address internal constant _NATIVE_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
address internal constant _ZERO_ADDR = address(0);
bytes32 internal constant _NULL = "";
uint256 internal constant _E_18 = 1e18;
/// @dev Checks that a uint isn't zero/empty
modifier nzUint(uint256 u) {
require(u != 0, "Shared: uint input is empty");
_;
}
/// @dev Checks that an address isn't zero/empty
modifier nzAddr(address a) {
require(a != _ZERO_ADDR, "Shared: address input is empty");
_;
}
/// @dev Checks that a bytes32 isn't zero/empty
modifier nzBytes32(bytes32 b) {
require(b != _NULL, "Shared: bytes32 input is empty");
_;
}
/// @dev Checks that the pubKeyX is populated
modifier nzKey(Key memory key) {
require(key.pubKeyX != 0, "Shared: pubKeyX is empty");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "SafeERC20.sol";
import "IVault.sol";
import "IKeyManager.sol";
import "ICFReceiver.sol";
import "Shared.sol";
import "Deposit.sol";
import "AggKeyNonceConsumer.sol";
import "GovernanceCommunityGuarded.sol";
/**
* @title Vault contract
* @notice The vault for holding and transferring native or ERC20 tokens and deploying contracts for
* fetching individual deposits. It also allows users to do cross-chain swaps and(or) calls by
* making a function call directly to this contract.
*/
contract Vault is IVault, AggKeyNonceConsumer, GovernanceCommunityGuarded {
using SafeERC20 for IERC20;
uint256 private constant _AGG_KEY_EMERGENCY_TIMEOUT = 3 days;
uint256 private constant _GAS_TO_FORWARD = 8_000;
uint256 private constant _FINALIZE_GAS_BUFFER = 30_000;
constructor(IKeyManager keyManager) AggKeyNonceConsumer(keyManager) {}
/// @dev Get the governor address from the KeyManager. This is called by the onlyGovernor
/// modifier in the GovernanceCommunityGuarded. This logic can't be moved to the
/// GovernanceCommunityGuarded since it requires a reference to the KeyManager.
function _getGovernor() internal view override returns (address) {
return getKeyManager().getGovernanceKey();
}
/// @dev Get the community key from the KeyManager. This is called by the isCommunityKey
/// modifier in the GovernanceCommunityGuarded. This logic can't be moved to the
/// GovernanceCommunityGuarded since it requires a reference to the KeyManager.
function _getCommunityKey() internal view override returns (address) {
return getKeyManager().getCommunityKey();
}
/// @dev Ensure that a new keyManager has the getGovernanceKey(), getCommunityKey()
/// and getLastValidateTime() are implemented. These are functions required for
/// this contract to at least be able to use the emergency mechanism.
function _checkUpdateKeyManager(IKeyManager keyManager, bool omitChecks) internal view override {
address newGovKey = keyManager.getGovernanceKey();
address newCommKey = keyManager.getCommunityKey();
uint256 lastValidateTime = keyManager.getLastValidateTime();
if (!omitChecks) {
// Ensure that the keys are the same
require(newGovKey == _getGovernor() && newCommKey == _getCommunityKey());
Key memory newAggKey = keyManager.getAggregateKey();
Key memory currentAggKey = getKeyManager().getAggregateKey();
require(
newAggKey.pubKeyX == currentAggKey.pubKeyX && newAggKey.pubKeyYParity == currentAggKey.pubKeyYParity
);
// Ensure that the last validate time is not in the future
require(lastValidateTime <= block.timestamp);
} else {
// Check that the addresses have been initialized
require(newGovKey != address(0) && newCommKey != address(0));
}
}
//////////////////////////////////////////////////////////////
// //
// Transfer and Fetch //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Can do a combination of all fcns in this contract. It first fetches all
* deposits , then it performs all transfers specified with the rest
* of the inputs, the same as transferBatch (where all inputs are again required
* to be of equal length - however the lengths of the fetch inputs do not have to
* be equal to lengths of the transfer inputs). Fetches/transfers of native tokens are
* indicated with 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE as the token address.
* @dev FetchAndDeploy is executed first to handle the edge case , which probably shouldn't
* happen anyway, where a deploy and a fetch for the same address are in the same batch.
* Transfers are executed last to ensure that all fetching has been completed first.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param deployFetchParamsArray The array of deploy and fetch parameters
* @param fetchParamsArray The array of fetch parameters
* @param transferParamsArray The array of transfer parameters
*/
function allBatch(
SigData calldata sigData,
DeployFetchParams[] calldata deployFetchParamsArray,
FetchParams[] calldata fetchParamsArray,
TransferParams[] calldata transferParamsArray
)
external
override
onlyNotSuspended
consumesKeyNonce(
sigData,
keccak256(abi.encode(this.allBatch.selector, deployFetchParamsArray, fetchParamsArray, transferParamsArray))
)
{
// Fetch by deploying new deposits
_deployAndFetchBatch(deployFetchParamsArray);
// Fetch from already deployed deposits
_fetchBatch(fetchParamsArray);
// Send all transfers
_transferBatch(transferParamsArray);
}
/**
* @notice Same functionality as allBatch but removing the contract deployments
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param fetchParamsArray The array of fetch parameters
* @param transferParamsArray The array of transfer parameters
*/
function allBatchV2(
SigData calldata sigData,
FetchParams[] calldata fetchParamsArray,
TransferParams[] calldata transferParamsArray
)
external
override
onlyNotSuspended
consumesKeyNonce(
sigData,
keccak256(abi.encode(this.allBatchV2.selector, fetchParamsArray, transferParamsArray))
)
{
// Fetch from already deployed deposits
_fetchBatch(fetchParamsArray);
// Send all transfers
_transferBatch(transferParamsArray);
}
//////////////////////////////////////////////////////////////
// //
// Transfers //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Transfers native tokens or a ERC20 token from this vault to a recipient
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param transferParams The transfer parameters
*/
function transfer(
SigData calldata sigData,
TransferParams calldata transferParams
)
external
override
onlyNotSuspended
nzAddr(transferParams.token)
nzAddr(transferParams.recipient)
nzUint(transferParams.amount)
consumesKeyNonce(sigData, keccak256(abi.encode(this.transfer.selector, transferParams)))
{
_transfer(transferParams.token, transferParams.recipient, transferParams.amount);
}
/**
* @notice Fallback transfer tokens from this vault to a recipient with all the gas.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param transferParams The transfer parameters
*/
function transferFallback(
SigData calldata sigData,
TransferParams calldata transferParams
)
external
onlyNotSuspended
nzAddr(transferParams.token)
nzAddr(transferParams.recipient)
nzUint(transferParams.amount)
consumesKeyNonce(sigData, keccak256(abi.encode(this.transferFallback.selector, transferParams)))
{
if (transferParams.token == _NATIVE_ADDR) {
(bool success, ) = transferParams.recipient.call{value: transferParams.amount}("");
require(success, "Vault: transfer fallback failed");
} else {
IERC20(transferParams.token).safeTransfer(transferParams.recipient, transferParams.amount);
}
}
/**
* @notice Transfers native tokens or ERC20 tokens from this vault to recipients.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param transferParamsArray The array of transfer parameters.
*/
function transferBatch(
SigData calldata sigData,
TransferParams[] calldata transferParamsArray
)
external
override
onlyNotSuspended
consumesKeyNonce(sigData, keccak256(abi.encode(this.transferBatch.selector, transferParamsArray)))
{
_transferBatch(transferParamsArray);
}
/**
* @notice Transfers native tokens or ERC20 tokens from this vault to recipients.
* @param transferParamsArray The array of transfer parameters.
*/
function _transferBatch(TransferParams[] calldata transferParamsArray) private {
uint256 length = transferParamsArray.length;
for (uint256 i = 0; i < length; ) {
_transfer(transferParamsArray[i].token, transferParamsArray[i].recipient, transferParamsArray[i].amount);
unchecked {
++i;
}
}
}
/**
* @notice Transfers ETH or a token from this vault to a recipient
* @dev When transfering native tokens, using call function limiting the amount of gas so
* the receivers can't consume all the gas. Setting that amount of gas to more than
* 2300 to future-proof the contract in case of opcode gas costs changing.
* @dev When transferring ERC20 tokens, if it fails ensure the transfer fails gracefully
* to not revert an entire batch. e.g. usdc blacklisted recipient. Following safeTransfer
* approach to support tokens that don't return a bool.
* @param token The address of the token to be transferred
* @param recipient The address of the recipient of the transfer
* @param amount The amount to transfer, in wei (uint)
*/
function _transfer(address token, address payable recipient, uint256 amount) private {
if (address(token) == _NATIVE_ADDR) {
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = recipient.call{gas: _GAS_TO_FORWARD, value: amount}("");
if (!success) {
emit TransferNativeFailed(recipient, amount);
}
} else {
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = token.call(
abi.encodeWithSelector(IERC20(token).transfer.selector, recipient, amount)
);
// No need to check token.code.length since it comes from a gated call
bool transferred = success && (returndata.length == uint256(0) || abi.decode(returndata, (bool)));
if (!transferred) emit TransferTokenFailed(recipient, amount, token, returndata);
}
}
//////////////////////////////////////////////////////////////
// //
// Fetch Deposits //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Retrieves any token from multiple address, deterministically generated using
* create2, by creating a contract for that address, sending it to this vault.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param deployFetchParamsArray The array of deploy and fetch parameters
*/
function deployAndFetchBatch(
SigData calldata sigData,
DeployFetchParams[] calldata deployFetchParamsArray
)
external
override
onlyNotSuspended
consumesKeyNonce(sigData, keccak256(abi.encode(this.deployAndFetchBatch.selector, deployFetchParamsArray)))
{
_deployAndFetchBatch(deployFetchParamsArray);
}
function _deployAndFetchBatch(DeployFetchParams[] calldata deployFetchParamsArray) private {
// Deploy deposit contracts
uint256 length = deployFetchParamsArray.length;
for (uint256 i = 0; i < length; ) {
new Deposit{salt: deployFetchParamsArray[i].swapID}(deployFetchParamsArray[i].token);
unchecked {
++i;
}
}
}
/**
* @notice Retrieves any token addresses where a Deposit contract is already deployed.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param fetchParamsArray The array of fetch parameters
*/
function fetchBatch(
SigData calldata sigData,
FetchParams[] calldata fetchParamsArray
)
external
override
onlyNotSuspended
consumesKeyNonce(sigData, keccak256(abi.encode(this.fetchBatch.selector, fetchParamsArray)))
{
_fetchBatch(fetchParamsArray);
}
/**
* @notice Retrieves any token from multiple addresses where a Deposit contract is already deployed.
* It emits an event if the fetch fails.
* @param fetchParamsArray The array of fetch parameters
*/
function _fetchBatch(FetchParams[] calldata fetchParamsArray) private {
uint256 length = fetchParamsArray.length;
for (uint256 i = 0; i < length; ) {
Deposit(fetchParamsArray[i].fetchContract).fetch(fetchParamsArray[i].token);
unchecked {
++i;
}
}
}
//////////////////////////////////////////////////////////////
// //
// Initiate cross-chain swaps (source chain) //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Swaps native token for a token in another chain. The egress token will be transferred to the specified
* destination address on the destination chain.
* @dev Checking the validity of inputs shall be done as part of the event witnessing. Only the amount is checked
* to explicity indicate that an amount is required. It isn't preventing spamming.
* @param dstChain The destination chain according to the Chainflip Protocol's nomenclature.
* @param dstAddress Bytes containing the destination address on the destination chain.
* @param dstToken Destination token to be swapped to.
* @param cfParameters Additional parameters to be passed to the Chainflip protocol.
*/
function xSwapNative(
uint32 dstChain,
bytes memory dstAddress,
uint32 dstToken,
bytes calldata cfParameters
) external payable override onlyNotSuspended nzUint(msg.value) {
emit SwapNative(dstChain, dstAddress, dstToken, msg.value, msg.sender, cfParameters);
}
/**
* @notice Swaps ERC20 token for a token in another chain. The desired token will be transferred to the specified
* destination address on the destination chain. The provided ERC20 token must be supported by the Chainflip Protocol.
* @dev Checking the validity of inputs shall be done as part of the event witnessing. Only the amount is checked
* to explicity indicate that an amount is required.
* @param dstChain The destination chain according to the Chainflip Protocol's nomenclature.
* @param dstAddress Bytes containing the destination address on the destination chain.
* @param dstToken Uint containing the specifics of the swap to be performed according to Chainflip's nomenclature.
* @param srcToken Address of the source token to swap.
* @param amount Amount of tokens to swap.
* @param cfParameters Additional parameters to be passed to the Chainflip protocol.
*/
function xSwapToken(
uint32 dstChain,
bytes memory dstAddress,
uint32 dstToken,
IERC20 srcToken,
uint256 amount,
bytes calldata cfParameters
) external override onlyNotSuspended nzUint(amount) {
srcToken.safeTransferFrom(msg.sender, address(this), amount);
emit SwapToken(dstChain, dstAddress, dstToken, address(srcToken), amount, msg.sender, cfParameters);
}
//////////////////////////////////////////////////////////////
// //
// Initiate cross-chain call and swap (source chain) //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Performs a cross-chain call to the destination address on the destination chain. Native tokens must be paid
* to this contract. The swap intent determines if the provided tokens should be swapped to a different token
* and transferred as part of the cross-chain call. Otherwise, all tokens are used as a payment for gas on the destination chain.
* The message parameter is transmitted to the destination chain as part of the cross-chain call.
* @dev Checking the validity of inputs shall be done as part of the event witnessing. Only the amount is checked
* to explicity inidcate that an amount is required. It isn't preventing spamming.
* @param dstChain The destination chain according to the Chainflip Protocol's nomenclature.
* @param dstAddress Bytes containing the destination address on the destination chain.
* @param dstToken Uint containing the specifics of the swap to be performed, if any, as part of the xCall. The string
* must follow Chainflip's nomenclature. It can signal that no swap needs to take place
* and the source token will be used for gas in a swapless xCall.
* @param message General purpose message to be sent to the egress chain. Notice that the Chainflip protocol has a limit size
* for the message. Ensure that the message length is smaller that the limit before starting a swap.
* @param gasAmount The amount to be used for gas in the egress chain.
* @param cfParameters Additional parameters to be passed to the Chainflip protocol.
*/
function xCallNative(
uint32 dstChain,
bytes calldata dstAddress,
uint32 dstToken,
bytes calldata message,
uint256 gasAmount,
bytes calldata cfParameters
) external payable override onlyNotSuspended nzUint(msg.value) {
emit XCallNative(dstChain, dstAddress, dstToken, msg.value, msg.sender, message, gasAmount, cfParameters);
}
/**
* @notice Performs a cross-chain call to the destination chain and destination address. An ERC20 token amount
* needs to be approved to this contract. The ERC20 token must be supported by the Chainflip Protocol.
* The swap intent determines whether the provided tokens should be swapped to a different token
* by the Chainflip Protocol. If so, the swapped tokens will be transferred to the destination chain as part
* of the cross-chain call. Otherwise, the tokens are used as a payment for gas on the destination chain.
* The message parameter is transmitted to the destination chain as part of the cross-chain call.
* @dev Checking the validity of inputs shall be done as part of the event witnessing. Only the amount is checked
* to explicity indicate that an amount is required.
* @param dstChain The destination chain according to the Chainflip Protocol's nomenclature.
* @param dstAddress Bytes containing the destination address on the destination chain.
* @param dstToken Uint containing the specifics of the swap to be performed, if any, as part of the xCall. The string
* must follow Chainflip's nomenclature. It can signal that no swap needs to take place
* and the source token will be used for gas in a swapless xCall.
* @param message General purpose message to be sent to the egress chain. Notice that the Chainflip protocol has a limit size
* for the message. Ensure that the message length is smaller that the limit before starting a swap.
* @param gasAmount The amount to be used for gas in the egress chain.
* @param srcToken Address of the source token.
* @param amount Amount of tokens to swap.
* @param cfParameters Additional parameters to be passed to the Chainflip protocol.
*/
function xCallToken(
uint32 dstChain,
bytes memory dstAddress,
uint32 dstToken,
bytes calldata message,
uint256 gasAmount,
IERC20 srcToken,
uint256 amount,
bytes calldata cfParameters
) external override onlyNotSuspended nzUint(amount) {
srcToken.safeTransferFrom(msg.sender, address(this), amount);
emit XCallToken(
dstChain,
dstAddress,
dstToken,
address(srcToken),
amount,
msg.sender,
message,
gasAmount,
cfParameters
);
}
//////////////////////////////////////////////////////////////
// //
// Gas topups //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Add gas (topup) to an existing cross-chain call with the unique identifier swapID.
* Native tokens must be paid to this contract as part of the call.
* @param swapID The unique identifier for this swap (bytes32)
*/
function addGasNative(bytes32 swapID) external payable override onlyNotSuspended nzUint(msg.value) {
emit AddGasNative(swapID, msg.value);
}
/**
* @notice Add gas (topup) to an existing cross-chain call with the unique identifier swapID.
* A Chainflip supported token must be paid to this contract as part of the call.
* @param swapID The unique identifier for this swap (bytes32)
* @param token Address of the token to provide.
* @param amount Amount of tokens to provide.
*/
function addGasToken(
bytes32 swapID,
uint256 amount,
IERC20 token
) external override onlyNotSuspended nzUint(amount) {
token.safeTransferFrom(msg.sender, address(this), amount);
emit AddGasToken(swapID, amount, address(token));
}
//////////////////////////////////////////////////////////////
// //
// Execute cross-chain call and swap (dest. chain) //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Transfers native tokens or an ERC20 token from this vault to a recipient and makes a function
* call completing a cross-chain swap and call. The ICFReceiver interface is expected on
* the receiver's address. A message is passed to the receiver along with other
* parameters specifying the origin of the swap.
* @dev Not checking nzUint(amount) to prevent reversions in edge cases (e.g. all input amount used for gas).
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param transferParams The transfer parameters
* @param srcChain The source chain where the call originated from.
* @param srcAddress The address where the transfer originated within the ingress chain.
* @param message The message to be passed to the recipient.
*/
function executexSwapAndCall(
SigData calldata sigData,
TransferParams calldata transferParams,
uint32 srcChain,
bytes calldata srcAddress,
bytes calldata message
)
external
override
onlyNotSuspended
nzAddr(transferParams.token)
nzAddr(transferParams.recipient)
consumesKeyNonce(
sigData,
keccak256(abi.encode(this.executexSwapAndCall.selector, transferParams, srcChain, srcAddress, message))
)
{
// Logic in another internal function to avoid the stackTooDeep error
_executexSwapAndCall(transferParams, srcChain, srcAddress, message);
}
/**
* @notice Logic for transferring the tokens and calling the recipient. It's on the receiver to
* make sure the call doesn't revert, otherwise the tokens won't be transferred.
* The _transfer function is not used because we want to be able to embed the native token
* into the cfReceive call to avoid doing two external calls.
* In case of revertion the tokens will remain in the Vault. Therefore, the destination
* contract must ensure it doesn't revert e.g. using try-catch mechanisms.
* @dev In the case of the ERC20 transfer reverting, not handling the error to allow for tx replay.
* Also, to ensure the cfReceive call is made only if the transfer is successful.
*/
function _executexSwapAndCall(
TransferParams calldata transferParams,
uint32 srcChain,
bytes calldata srcAddress,
bytes calldata message
) private {
uint256 nativeAmount;
if (transferParams.amount > 0) {
if (transferParams.token == _NATIVE_ADDR) {
nativeAmount = transferParams.amount;
} else {
IERC20(transferParams.token).safeTransfer(transferParams.recipient, transferParams.amount);
}
}
ICFReceiver(transferParams.recipient).cfReceive{value: nativeAmount}(
srcChain,
srcAddress,
message,
transferParams.token,
transferParams.amount
);
}
//////////////////////////////////////////////////////////////
// //
// Execute cross-chain call (dest. chain) //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Executes a cross-chain function call. The ICFReceiver interface is expected on
* the receiver's address. A message is passed to the receiver along with other
* parameters specifying the origin of the swap. This is used for cross-chain messaging
* without any swap taking place on the Chainflip Protocol.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param srcChain The source chain where the call originated from.
* @param srcAddress The address where the transfer originated from in the ingressParams.
* @param message The message to be passed to the recipient.
*/
function executexCall(
SigData calldata sigData,
address recipient,
uint32 srcChain,
bytes calldata srcAddress,
bytes calldata message
)
external
override
onlyNotSuspended
nzAddr(recipient)
consumesKeyNonce(
sigData,
keccak256(abi.encode(this.executexCall.selector, recipient, srcChain, srcAddress, message))
)
{
ICFReceiver(recipient).cfReceivexCall(srcChain, srcAddress, message);
}
//////////////////////////////////////////////////////////////
// //
// Auxiliary chain actions //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Transfer funds and pass calldata to be executed on a Multicall contract.
* @dev For safety purposes it's preferred to execute calldata externally with
* a limited amount of funds instead of executing arbitrary calldata here.
* @dev Calls are not reverted upon Multicall.run() failure so the nonce gets consumed. The
* gasMulticall parameters is needed to prevent an insufficient gas griefing attack.
* The _GAS_BUFFER is a conservative estimation of the gas required to finalize the call.
* @param sigData Struct containing the signature data over the message
* to verify, signed by the aggregate key.
* @param transferParams The transfer parameters inluding the token and amount to be transferred
* and the multicall contract address.
* @param calls Array of actions to be executed.
* @param gasMulticall Gas that must be forwarded to the multicall.
*/
function executeActions(
SigData calldata sigData,
TransferParams calldata transferParams,
IMulticall.Call[] calldata calls,
uint256 gasMulticall
)
external
override
onlyNotSuspended
consumesKeyNonce(
sigData,
keccak256(abi.encode(this.executeActions.selector, transferParams, calls, gasMulticall))
)
{
// Fund and run multicall
uint256 valueToSend;
if (transferParams.amount > 0) {
if (transferParams.token == _NATIVE_ADDR) {
valueToSend = transferParams.amount;
} else {
IERC20(transferParams.token).approve(transferParams.recipient, transferParams.amount);
}
}
// Ensure that the amount of gas supplied to the call to the Multicall contract is at least the gas
// limit specified. We can do this by enforcing that we still have gasMulticall + gas buffer available.
// The gas buffer is to ensure there is enough gas to finalize the call, including a safety margin.
// The 63/64 rule specified in EIP-150 needs to be taken into account.
require(gasleft() >= ((gasMulticall + _FINALIZE_GAS_BUFFER) * 64) / 63, "Vault: insufficient gas");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory reason) = transferParams.recipient.call{
gas: gasleft() - _FINALIZE_GAS_BUFFER,
value: valueToSend
}(abi.encodeWithSelector(IMulticall.run.selector, calls, transferParams.token, transferParams.amount));
if (!success) {
if (transferParams.amount > 0 && transferParams.token != _NATIVE_ADDR) {
IERC20(transferParams.token).approve(transferParams.recipient, 0);
}
emit ExecuteActionsFailed(transferParams.recipient, transferParams.amount, transferParams.token, reason);
} else {
require(transferParams.recipient.code.length > 0);
}
}
//////////////////////////////////////////////////////////////
// //
// Governance //
// //
//////////////////////////////////////////////////////////////
/**
* @notice Withdraw all funds to governance address in case of emergency. This withdrawal needs
* to be approved by the Community and it can only be executed if no nonce from the
* current AggKey had been consumed in _AGG_KEY_TIMEOUT time. It is a last resort and
* can be used to rectify an emergency.
* @param tokens The addresses of the tokens to be transferred
*/
function govWithdraw(
address[] calldata tokens
) external override onlyGovernor onlyCommunityGuardDisabled onlySuspended timeoutEmergency {
// Could use msg.sender or getGovernor() but hardcoding the get call just for extra safety
address payable recipient = payable(getKeyManager().getGovernanceKey());
// Transfer all native tokens and ERC20 Tokens
for (uint256 i = 0; i < tokens.length; i++) {
if (tokens[i] == _NATIVE_ADDR) {
_transfer(_NATIVE_ADDR, recipient, address(this).balance);
} else {
_transfer(tokens[i], recipient, IERC20(tokens[i]).balanceOf(address(this)));
}
}
}
//////////////////////////////////////////////////////////////
// //
// Modifiers //
// //
//////////////////////////////////////////////////////////////
/// @dev Check that no nonce has been consumed in the last 3 days - emergency
modifier timeoutEmergency() {
require(
block.timestamp - getKeyManager().getLastValidateTime() >= _AGG_KEY_EMERGENCY_TIMEOUT,
"Vault: not enough time"
);
_;
}
//////////////////////////////////////////////////////////////
// //
// Fallbacks //
// //
//////////////////////////////////////////////////////////////
/// @dev For receiving native tokens from the Deposit contracts
receive() external payable {
emit FetchedNative(msg.sender, msg.value);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
{
"compilationTarget": {
"Vault.sol": "Vault"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 800
},
"remappings": []
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