47 lines
1.5 KiB
Solidity
47 lines
1.5 KiB
Solidity
pragma solidity ^0.5.8;
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import "./ETHTornado.sol";
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contract MigratableETHTornado is ETHTornado {
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bool public isMigrated = false;
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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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) ETHTornado(_verifier, _denomination, _merkleTreeHeight, _operator) public {
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}
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/**
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@dev Migrate state from old v1 tornado.cash instance to this contract.
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@dev only applies to eth 0.1 deposits
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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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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 onlyOperator {
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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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