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| // SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol";
import "./interfaces/iErc20Handler.sol";
import "./interfaces/iSequencerHandler.sol";
import "./interfaces/iRouterSequencerCrossTalkUpgradeable.sol";
/// @title RouterSequencerCrossTalkUpgradeable contract
/// @author Router Protocol
abstract contract RouterSequencerCrossTalkUpgradeable is
Initializable,
ContextUpgradeable,
iRouterSequencerCrossTalkUpgradeable,
ERC165Upgradeable
{
using SafeERC20Upgradeable for IERC20Upgradeable;
iSequencerHandler private sequencerHandler;
IERCHandler private erc20Handler;
address private reserveHandler;
address private linkSetter;
address private feeToken;
mapping(uint8 => address) private Chain2Addr; // CHain ID to Address
mapping(bytes32 => ExecutesStruct) private executes;
modifier isHandler() {
require(
_msgSender() == address(sequencerHandler),
"Only SequencerHandler"
);
_;
}
modifier isLinkUnSet(uint8 _chainID) {
require(
Chain2Addr[_chainID] == address(0),
"Contract to ChainId already set"
);
_;
}
modifier isLinkSet(uint8 _chainID) {
require(
Chain2Addr[_chainID] != address(0),
"Contract to ChainId not set"
);
_;
}
modifier isLinkSync(uint8 _srcChainID, address _srcAddress) {
require(
Chain2Addr[_srcChainID] == _srcAddress,
"Src address not linked"
);
_;
}
modifier isSelf() {
require(_msgSender() == address(this), "Only this contract");
_;
}
function __RouterCrossTalkUpgradeable_init(
address _sequencerHandler,
address _erc20Handler
) internal initializer {
__Context_init_unchained();
sequencerHandler = iSequencerHandler(_sequencerHandler);
erc20Handler = IERCHandler(_erc20Handler);
reserveHandler = erc20Handler._reserve();
}
function __RouterCrossTalkUpgradeable_init_unchained(
address _sequencerHandler,
address _erc20Handler
) internal initializer {
sequencerHandler = iSequencerHandler(_sequencerHandler);
erc20Handler = IERCHandler(_erc20Handler);
reserveHandler = erc20Handler._reserve();
}
/// @notice Used to set linker address, this function is internal and can only be set by contract owner or admins
/// @param _addr Address of linker.
function setLink(address _addr) internal {
linkSetter = _addr;
}
/// @notice Used to set fee Token address, this function is internal and can only be set by contract owner or admins
/// @param _addr Address of linker.
function setFeeToken(address _addr) internal {
feeToken = _addr;
}
function fetchSequencerHandler() external view override returns (address) {
return address(sequencerHandler);
}
function fetchErcHandler() external view override returns (address) {
return address(erc20Handler);
}
function fetchReserveHandler() external view override returns (address) {
return address(reserveHandler);
}
function fetchLinkSetter() external view override returns (address) {
return linkSetter;
}
function fetchLink(uint8 _chainID)
external
view
override
returns (address)
{
return Chain2Addr[_chainID];
}
function fetchFeeToken() external view override returns (address) {
return feeToken;
}
function fetchExecutes(bytes32 hash)
external
view
override
returns (ExecutesStruct memory)
{
return executes[hash];
}
/// @notice routerSend This is internal function to generate a cross chain communication request.
/// @param _params params struct.
function routerSend(Params memory _params)
internal
isLinkSet(_params._destChainID)
returns (bool, bytes32)
{
uint64 nonce;
if (!_params._isOnlyGeneric) {
_manageTransfers(_params);
nonce = sequencerHandler.genericDepositWithERC(
_params._destChainID,
_params._erc20,
_params._swapData,
_params._generic,
_params._gasLimit,
_params._gasPrice,
_params._feeToken,
_params._isTransferFirst
);
} else {
nonce = sequencerHandler.genericDeposit(
_params._destChainID,
_params._generic,
_params._gasLimit,
_params._gasPrice,
_params._feeToken
);
}
// _params._generic contains bytes4 _selector and bytes memory _data
bytes4 _selector = abi.decode(_params._generic, (bytes4));
bytes32 hash = _hash(_params._destChainID, nonce);
executes[hash] = ExecutesStruct(_params._destChainID, nonce);
emit CrossTalkSend(
sequencerHandler.fetch_chainID(),
_params,
address(this),
Chain2Addr[_params._destChainID],
_selector,
hash
);
return (true, hash);
}
function _manageTransfers(Params memory _params) internal {
(uint8 destinationChainID, , , , , address feeTokenAddress) = abi
.decode(
_params._erc20,
(uint8, bytes32, uint256[], address[], bytes[], address)
);
(, uint256 exchangeFee) = erc20Handler.getBridgeFee(
destinationChainID,
feeTokenAddress
);
IERC20Upgradeable(feeTokenAddress).safeTransferFrom(
msg.sender,
address(this),
exchangeFee
);
IERC20Upgradeable(feeTokenAddress).safeIncreaseAllowance(
reserveHandler,
exchangeFee
);
this.transferAmt(_params._swapData, msg.sender);
}
function transferAmt(bytes calldata data, address sender) external isSelf {
(
uint256 srcTokenAmount,
,
,
,
,
uint256 lenRecipientAddress,
uint256 lenSrcTokenAddress,
) = abi.decode(
data,
(
uint256,
uint256,
uint256,
uint256,
uint256,
uint256,
uint256,
uint256
)
);
uint256 index = 288; // 32 * 6 -> 9
index = index + lenRecipientAddress;
bytes memory srcToken = bytes(data[index:index + lenSrcTokenAddress]);
bytes20 srcTokenAdd;
assembly {
srcTokenAdd := mload(add(srcToken, 0x20))
}
address srcTokenAddress = address(srcTokenAdd);
IERC20Upgradeable(srcTokenAddress).safeTransferFrom(
sender,
address(this),
srcTokenAmount
);
IERC20Upgradeable(srcTokenAddress).safeIncreaseAllowance(
reserveHandler,
srcTokenAmount
);
}
function routerSync(
uint8 srcChainID,
address srcAddress,
bytes memory genericData,
address settlementToken,
uint256 returnAmount
)
external
override
isLinkSync(srcChainID, srcAddress)
isHandler
returns (bool, bytes memory)
{
uint8 cid = sequencerHandler.fetch_chainID();
(bytes4 _selector, bytes memory _data) = abi.decode(
genericData,
(bytes4, bytes)
);
(bool success, bytes memory _returnData) = _routerSyncHandler(
_selector,
_data,
settlementToken,
returnAmount
);
emit CrossTalkReceive(srcChainID, cid, srcAddress);
return (success, _returnData);
}
function routerReplay(
bytes32 hash,
uint256 _gasLimit,
uint256 _gasPrice
) internal {
sequencerHandler.replayDeposit(
executes[hash].chainID,
executes[hash].nonce,
_gasLimit,
_gasPrice
);
}
/// @notice Function to generate the hash of all data sent or received by the contract.
/// @dev This is an internal and pure function.
/// @param _destChainId Source Address.
/// @param _nonce Nonce for the tx.
function _hash(uint8 _destChainId, uint64 _nonce)
internal
pure
returns (bytes32)
{
return keccak256(abi.encode(_destChainId, _nonce));
}
function Link(uint8 _chainID, address _linkedContract)
external
override
isHandler
isLinkUnSet(_chainID)
{
Chain2Addr[_chainID] = _linkedContract;
emit Linkevent(_chainID, _linkedContract);
}
function Unlink(uint8 _chainID)
external
override
isHandler
isLinkSet(_chainID)
{
emit Unlinkevent(_chainID, Chain2Addr[_chainID]);
Chain2Addr[_chainID] = address(0);
}
function approveFees(address _feeToken, uint256 _value) internal {
IERC20Upgradeable token = IERC20Upgradeable(_feeToken);
token.safeApprove(address(sequencerHandler), _value);
}
function approveTokens(
address _toBeApproved,
address _token,
uint256 _value
) internal {
IERC20Upgradeable token = IERC20Upgradeable(_token);
token.safeApprove(_toBeApproved, _value);
}
/// @notice _routerSyncHandler This is internal function to control the handling of various selectors and its corresponding .
/// @param _selector Selector to interface.
/// @param _data Data to be handled.
/// @param _settlementToken address of the settlement token.
/// @param _returnAmount amount of settlement token paid to the recipient.
function _routerSyncHandler(
bytes4 _selector,
bytes memory _data,
address _settlementToken,
uint256 _returnAmount
) internal virtual returns (bool, bytes memory);
uint256[100] private __gap;
}
|