72 lines
2.8 KiB
Solidity
72 lines
2.8 KiB
Solidity
// https://tornado.cash
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/*
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* d888888P dP a88888b. dP
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* 88 88 d8' `88 88
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* 88 .d8888b. 88d888b. 88d888b. .d8888b. .d888b88 .d8888b. 88 .d8888b. .d8888b. 88d888b.
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* 88 88' `88 88' `88 88' `88 88' `88 88' `88 88' `88 88 88' `88 Y8ooooo. 88' `88
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* 88 88. .88 88 88 88 88. .88 88. .88 88. .88 dP Y8. .88 88. .88 88 88 88
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* dP `88888P' dP dP dP `88888P8 `88888P8 `88888P' 88 Y88888P' `88888P8 `88888P' dP dP
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* ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
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*/
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pragma solidity ^0.5.8;
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import "./Mixer.sol";
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contract ETHMixer is Mixer {
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constructor(
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IVerifier _verifier,
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uint256 _denomination,
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uint32 _merkleTreeHeight,
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address _operator
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) Mixer(_verifier, _denomination, _merkleTreeHeight, _operator) public {
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}
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function _processDeposit() internal {
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require(msg.value == denomination, "Please send `mixDenomination` ETH along with transaction");
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}
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function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal {
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// sanity checks
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require(msg.value == 0, "Message value is supposed to be zero for ETH mixer");
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require(_refund == 0, "Refund value is supposed to be zero for ETH mixer");
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(bool success, ) = _recipient.call.value(denomination - _fee)("");
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require(success, "payment to _recipient did not go thru");
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if (_fee > 0) {
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(success, ) = _relayer.call.value(_fee)("");
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require(success, "payment to _relayer did not go thru");
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}
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}
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/**
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@dev Migrate state from old mixer to this one.
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@param _commitments deposited commitments from previous contract
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@param _nullifierHashes spent nullifiers from previous contract
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*/
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bool public isMigrated = false;
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function migrateState(bytes32[] calldata _commitments, bytes32[] calldata _nullifierHashes) external onlyOperator {
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require(!isMigrated, "Migration is disabled");
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for (uint32 i = 0; i < _commitments.length; i++) {
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commitments[_commitments[i]] = true;
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emit Deposit(_commitments[i], nextIndex + i, block.timestamp);
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}
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nextIndex += uint32(_commitments.length);
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for (uint256 i = 0; i < _nullifierHashes.length; i++) {
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nullifierHashes[_nullifierHashes[i]] = true;
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emit Withdrawal(address(0), _nullifierHashes[i], address(0), 0);
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}
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}
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function initializeTreeForMigration(bytes32[] calldata _filledSubtrees, bytes32 _root) external {
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require(!isMigrated, "already migrated");
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filledSubtrees = _filledSubtrees;
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roots[0] = _root;
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}
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function finishMigration() external payable onlyOperator {
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isMigrated = true;
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}
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}
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