88 lines
2.8 KiB
Solidity
88 lines
2.8 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity 0.7.6;
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pragma abicoder v2;
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import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
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import { Address } from "@openzeppelin/contracts/utils/Address.sol";
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import "@openzeppelin/contracts/proxy/Clones.sol";
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import "./ERC20TornadoCloneable.sol";
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contract InstanceFactory is Ownable {
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using Clones for address;
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using Address for address;
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address public implementation;
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address public verifier;
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address public hasher;
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uint32 public merkleTreeHeight;
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event NewVerifierSet(address indexed newVerifier);
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event NewHasherSet(address indexed newHasher);
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event NewTreeHeightSet(uint32 indexed newTreeHeight);
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event NewImplementationSet(address indexed newImplemenentation);
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event NewInstanceCloneCreated(address indexed clone);
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constructor(
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address _verifier,
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address _hasher,
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uint32 _merkleTreeHeight,
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address _owner
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) {
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verifier = _verifier;
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hasher = _hasher;
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merkleTreeHeight = _merkleTreeHeight;
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ERC20TornadoCloneable implContract = new ERC20TornadoCloneable(_verifier, _hasher);
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implementation = address(implContract);
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transferOwnership(_owner);
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}
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/**
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* @dev Creates new Tornado instance.
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* @param _denomination denomination of new Tornado instance
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* @param _token address of ERC20 token for a new instance
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*/
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function createInstanceClone(uint256 _denomination, address _token) public virtual returns (address) {
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bytes32 salt = keccak256(abi.encodePacked(_denomination, _token));
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require(!implementation.predictDeterministicAddress(salt).isContract(), "Instance already exists");
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address newClone = implementation.cloneDeterministic(salt);
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emit NewInstanceCloneCreated(newClone);
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ERC20TornadoCloneable(newClone).init(_denomination, merkleTreeHeight, _token);
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return newClone;
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}
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function getInstanceAddress(uint256 _denomination, address _token) public view returns (address) {
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bytes32 salt = keccak256(abi.encodePacked(_denomination, _token));
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return implementation.predictDeterministicAddress(salt);
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}
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function setVerifier(address _verifier) external onlyOwner {
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verifier = _verifier;
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emit NewVerifierSet(verifier);
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}
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function setHasher(address _hasher) external onlyOwner {
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hasher = _hasher;
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emit NewHasherSet(hasher);
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}
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function setMerkleTreeHeight(uint32 _merkleTreeHeight) external onlyOwner {
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merkleTreeHeight = _merkleTreeHeight;
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emit NewTreeHeightSet(merkleTreeHeight);
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}
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function setImplementation(address _newImplementation) external onlyOwner {
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implementation = _newImplementation;
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emit NewImplementationSet(implementation);
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}
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function generateNewImplementation() external onlyOwner {
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implementation = address(new ERC20TornadoCloneable(verifier, hasher));
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}
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}
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