smart-contract/contracts/UserWallet.sol
2019-04-07 20:11:57 +05:30

168 lines
3.7 KiB
Solidity

pragma solidity ^0.5.2;
/**
* @title RegistryInterface Interface
*/
interface RegistryInterface {
function logic(address logicAddr) external view returns (bool);
function record(address currentOwner, address nextOwner) external;
}
/**
* @title Address Registry Record
*/
contract AddressRecord {
/**
* @dev address registry of system, logic and wallet addresses
*/
address public registry;
/**
* @dev Throws if the logic is not authorised
*/
modifier logicAuth(address logicAddr) {
require(logicAddr != address(0), "logic-proxy-address-required");
require(RegistryInterface(registry).logic(logicAddr), "logic-not-authorised");
_;
}
}
/**
* @title User Auth
*/
contract UserAuth is AddressRecord {
event LogSetOwner(address indexed owner);
address public owner;
/**
* @dev Throws if not called by owner or contract itself
*/
modifier auth {
require(isAuth(msg.sender), "permission-denied");
_;
}
/**
* @dev sets new owner
*/
function setOwner(address nextOwner) public auth {
RegistryInterface(registry).record(owner, nextOwner);
owner = nextOwner;
emit LogSetOwner(nextOwner);
}
/**
* @dev checks if called by owner or contract itself
* @param src is the address initiating the call
*/
function isAuth(address src) public view returns (bool) {
if (src == owner) {
return true;
} else if (src == address(this)) {
return true;
}
return false;
}
}
/**
* @dev logging the execute events
*/
contract UserNote {
event LogNote(
bytes4 indexed sig,
address indexed guy,
bytes32 indexed foo,
bytes32 bar,
uint wad,
bytes fax
);
modifier note {
bytes32 foo;
bytes32 bar;
assembly {
foo := calldataload(4)
bar := calldataload(36)
}
emit LogNote(
msg.sig,
msg.sender,
foo,
bar,
msg.value,
msg.data
);
_;
}
}
/**
* @title User Owned Contract Wallet
*/
contract UserWallet is UserAuth, UserNote {
event LogExecute(address target, uint srcNum, uint sessionNum);
/**
* @dev sets the "address registry", owner's last activity, owner's active period and initial owner
*/
constructor() public {
registry = msg.sender;
owner = msg.sender;
}
function() external payable {}
/**
* @dev Execute authorised calls via delegate call
* @param _target logic proxy address
* @param _data delegate call data
* @param _src to find the source
* @param _session to find the session
*/
function execute(
address _target,
bytes memory _data,
uint _src,
uint _session
)
public
payable
note
auth
logicAuth(_target)
returns (bytes memory response)
{
emit LogExecute(
_target,
_src,
_session
);
// call contract in current context
assembly {
let succeeded := delegatecall(sub(gas, 5000), _target, add(_data, 0x20), mload(_data), 0, 0)
let size := returndatasize
response := mload(0x40)
mstore(0x40, add(response, and(add(add(size, 0x20), 0x1f), not(0x1f))))
mstore(response, size)
returndatacopy(add(response, 0x20), 0, size)
switch iszero(succeeded)
case 1 {
// throw if delegatecall failed
revert(add(response, 0x20), size)
}
}
}
}