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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/iGenericHandler.sol";
import "./interfaces/iRouterCrossTalkUpgradeable.sol";
/// @title RouterCrossTalkUpgradeable contract
/// @author Router Protocol
abstract contract RouterCrossTalkUpgradeable is
Initializable,
ContextUpgradeable,
iRouterCrossTalkUpgradeable,
ERC165Upgradeable
{
using SafeERC20Upgradeable for IERC20Upgradeable;
iGenericHandler private handler;
address private linkSetter;
address private feeToken;
mapping(uint8 => address) private Chain2Addr; // CHain ID to Address
mapping(bytes32 => ExecutesStruct) private executes;
modifier isHandler() {
Erequire(
_msgSender() == address(handler),
"RouterSync : Only GenericHandler can call this function"
);
_;
}
modifier isLinkUnSet(uint8 _chainID) {
Erequire(
Chain2Addr[_chainID] == address(0),
"RouterSync : Cross Chain Contract to Chain ID not set"
);
_;
}
modifier isLinkSet(uint8 _chainID) {
Erequire(
Chain2Addr[_chainID] != address(0),
"RouterCrossTalk : Cross Chain Contract to Chain ID already set"
);
_;
}
modifier isLinkSync(uint8 _srcChainID, address _srcAddress) {
Erequire(
Chain2Addr[_srcChainID] == _srcAddress,
"RouterSync : Source Address Not linked"
);
_;
}
modifier isSelf() {
Erequire(
_msgSender() == address(this),
"RouterCrossTalk : Can only be called by Current Contract"
);
_;
}
function __RouterCrossTalkUpgradeable_init(address _handler)
internal
initializer
{
__Context_init_unchained();
handler = iGenericHandler(_handler);
}
function __RouterCrossTalkUpgradeable_init_unchained(address _handler)
internal
initializer
{
handler = iGenericHandler(_handler);
}
/// @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 fetchHandler() external view override returns (address) {
return address(handler);
}
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 destChainId Destination ChainID.
/// @param _selector Selector to interface on destination side.
/// @param _data Data to be sent on Destination side.
/// @param _gasLimit Gas limit provided for cross chain send.
/// @param _gasPrice Gas price provided for cross chain send.
function routerSend(
uint8 destChainId,
bytes4 _selector,
bytes memory _data,
uint256 _gasLimit,
uint256 _gasPrice
) internal isLinkSet(destChainId) returns (bool, bytes32) {
bytes memory data = abi.encode(_selector, _data);
uint64 nonce = handler.genericDeposit(
destChainId,
data,
_gasLimit,
_gasPrice,
feeToken
);
bytes32 hash = _hash(destChainId, nonce);
executes[hash] = ExecutesStruct(destChainId, nonce);
emitCrossTalkSendEvent(destChainId, _selector, _data, hash);
return (true, hash);
}
function emitCrossTalkSendEvent(
uint8 destChainId,
bytes4 selector,
bytes memory data,
bytes32 hash
) private {
emit CrossTalkSend(
handler.fetch_chainID(),
destChainId,
address(this),
Chain2Addr[destChainId],
selector,
data,
hash
);
}
function routerSync(
uint8 srcChainID,
address srcAddress,
bytes memory data
)
external
override
isLinkSync(srcChainID, srcAddress)
isHandler
returns (bool, bytes memory)
{
uint8 cid = handler.fetch_chainID();
(bytes4 _selector, bytes memory _data) = abi.decode(
data,
(bytes4, bytes)
);
(bool success, bytes memory _returnData) = _routerSyncHandler(
_selector,
_data
);
emit CrossTalkReceive(srcChainID, cid, srcAddress);
return (success, _returnData);
}
function routerReplay(
bytes32 hash,
uint256 _gasLimit,
uint256 _gasPrice
) internal {
handler.replayGenericDeposit(
executes[hash].chainID,
executes[hash].nonce,
_gasLimit,
_gasPrice
);
}
/// @notice _hash This is internal function to generate the hash of all data sent or received by the contract.
/// @param _destChainId Destination ChainID.
/// @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.approve(address(handler), _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.
function _routerSyncHandler(bytes4 _selector, bytes memory _data)
internal
virtual
returns (bool, bytes memory);
uint256[100] private __gap;
}
|