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pragma solidity >=0.6.7;
import 'ds-proxy/proxy.sol';
// This Registry deploys new proxy instances through and keeps a registry of owner => proxy
contract GebProxyRegistry {
mapping(address => DSProxy) public proxies;
DSProxyFactory factory;
// --- Events ---
event Build(address usr, address proxy);
constructor(address factory_) public {
factory = DSProxyFactory(factory_);
// deploys a new proxy instance
// sets owner of proxy to caller
function build() public returns (address payable proxy) {
proxy = build(msg.sender);
emit Build(msg.sender, proxy);
// deploys a new proxy instance
// sets custom owner of proxy
function build(address owner) public returns (address payable proxy) {
require(proxies[owner] == DSProxy(0) || proxies[owner].owner() != owner); // Not allow new proxy if the user already has one and remains being the owner
proxy =;
proxies[owner] = DSProxy(proxy);
emit Build(owner, proxy);