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Merge pull request #20 from peppersec/audit-4

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ether sending
This commit is contained in:
Roman Storm 2019-11-11 11:45:56 -08:00 committed by GitHub
commit a48858fd34
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 118 additions and 8 deletions
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6
contracts/ERC20Mixer.sol
View File

@ -26,12 +26,12 @@ contract ERC20Mixer is Mixer {
token = _token;
}
function _processDeposit() internal {
function _processDeposit() internal nonReentrant {
require(msg.value == 0, "ETH value is supposed to be 0 for ETH mixer");
_safeErc20TransferFrom(msg.sender, address(this), denomination);
}
function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal {
function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal nonReentrant {
require(msg.value == _refund, "Incorrect refund amount received by the contract");
_safeErc20Transfer(_recipient, denomination - _fee);
@ -39,7 +39,7 @@ contract ERC20Mixer is Mixer {
_safeErc20Transfer(_relayer, _fee);
}
if (_refund > 0) {
_recipient.transfer(_refund);
_recipient.call.value(_refund)("");
}
}

10
contracts/ETHMixer.sol
View File

@ -22,18 +22,20 @@ contract ETHMixer is Mixer {
) Mixer(_verifier, _denomination, _merkleTreeHeight, _operator) public {
}
function _processDeposit() internal {
function _processDeposit() internal nonReentrant {
require(msg.value == denomination, "Please send `mixDenomination` ETH along with transaction");
}
function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal {
function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal nonReentrant {
// sanity checks
require(msg.value == 0, "Message value is supposed to be zero for ETH mixer");
require(_refund == 0, "Refund value is supposed to be zero for ETH mixer");
_recipient.transfer(denomination - _fee);
(bool success, ) = _recipient.call.value(denomination - _fee)("");
require(success, "payment to _recipient did not go thru");
if (_fee > 0) {
_relayer.transfer(_fee);
(success, ) = _relayer.call.value(_fee)("");
require(success, "payment to _relayer did not go thru");
}
}
}

3
contracts/Mixer.sol
View File

@ -12,12 +12,13 @@
pragma solidity ^0.5.8;
import "./MerkleTreeWithHistory.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
contract IVerifier {
function verifyProof(bytes memory _proof, uint256[6] memory _input) public returns(bool);
}
contract Mixer is MerkleTreeWithHistory {
contract Mixer is MerkleTreeWithHistory, ReentrancyGuard {
uint256 public denomination;
mapping(bytes32 => bool) public nullifierHashes;
// we store all commitments just to prevent accidental deposits with the same commitment

107
package-lock.json generated
View File

@ -1680,6 +1680,113 @@
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