diff --git a/README.md b/README.md
index b03ea2d..99f4c6b 100644
--- a/README.md
+++ b/README.md
@@ -15,3 +15,11 @@ $ yarn
 $ yarn circuit
 $ yarn test
 ```
+
+## Mainnet testing
+
+```bash
+$ yarn circuit
+$ npx hardhat node --fork <https://eth-mainnet.alchemyapi.io/v2/API_KEY> --fork-block-number 11827889
+$ npx hardhat test
+```
diff --git a/contracts/Proposal.sol b/contracts/Proposal.sol
new file mode 100644
index 0000000..48bbfdc
--- /dev/null
+++ b/contracts/Proposal.sol
@@ -0,0 +1,66 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.6.0;
+pragma experimental ABIEncoderV2;
+
+import "./interfaces/ITornadoTreesV1.sol";
+import "./interfaces/ITornadoProxyV1.sol";
+import "./verifiers/BatchTreeUpdateVerifier.sol";
+import "./interfaces/IBatchTreeUpdateVerifier.sol";
+import "./TornadoTrees.sol";
+
+// import tornadoProxy from anonymity mining repo branch v2
+
+contract Proposal {
+  ITornadoTreesV1 public immutable tornadoTreesV1 = ITornadoTreesV1(0x43a3bE4Ae954d9869836702AFd10393D3a7Ea417);
+  ITornadoProxyV1 public immutable tornadoProxyV1 = ITornadoProxyV1(0x905b63Fff465B9fFBF41DeA908CEb12478ec7601);
+  address[] public instances = [
+    0x12D66f87A04A9E220743712cE6d9bB1B5616B8Fc,
+    0x47CE0C6eD5B0Ce3d3A51fdb1C52DC66a7c3c2936,
+    0x910Cbd523D972eb0a6f4cAe4618aD62622b39DbF,
+    0xA160cdAB225685dA1d56aa342Ad8841c3b53f291
+  ];
+
+  // define erc20 instances
+
+  function executeProposal() public {
+    BatchTreeUpdateVerifier verifier = new BatchTreeUpdateVerifier();
+
+    TornadoTrees.SearchParams memory searchParams = TornadoTrees.SearchParams({
+      unprocessedDeposits: 8000,
+      unprocessedWithdrawals: 8000,
+      depositsPerDay: 50,
+      withdrawalsPerDay: 50
+    });
+    address tornadoProxyAddress = computeAddress(address(this), 1);
+    TornadoTrees tornadoTrees = new TornadoTrees(
+      address(this),
+      tornadoProxyAddress,
+      tornadoTreesV1,
+      IBatchTreeUpdateVerifier(address(verifier)),
+      searchParams
+    );
+
+    for (uint256 i = 0; i < instances.length; i++) {
+      tornadoProxyV1.updateInstance(instances[i], false);
+    }
+
+    // deploy new tornadoProxy
+    // make sure you passed erc20 instances as well
+    // require(address(tornadoProxy) == tornadoProxyAddress, "tornadoProxy deployed to an unexpected address");
+
+    // set new trees contract on miner.sol
+    // reduce quorum?
+  }
+
+  function computeAddress(address _origin, uint256 _nonce) public pure returns (address) {
+    bytes memory data;
+    if (_nonce == 0x00) data = abi.encodePacked(bytes1(0xd6), bytes1(0x94), _origin, bytes1(0x80));
+    else if (_nonce <= 0x7f) data = abi.encodePacked(bytes1(0xd6), bytes1(0x94), _origin, bytes1(uint8(_nonce)));
+    else if (_nonce <= 0xff) data = abi.encodePacked(bytes1(0xd7), bytes1(0x94), _origin, bytes1(0x81), uint8(_nonce));
+    else if (_nonce <= 0xffff) data = abi.encodePacked(bytes1(0xd8), bytes1(0x94), _origin, bytes1(0x82), uint16(_nonce));
+    else if (_nonce <= 0xffffff) data = abi.encodePacked(bytes1(0xd9), bytes1(0x94), _origin, bytes1(0x83), uint24(_nonce));
+    else data = abi.encodePacked(bytes1(0xda), bytes1(0x94), _origin, bytes1(0x84), uint32(_nonce));
+    bytes32 hash = keccak256(data);
+    return address(uint160(uint256(hash)));
+  }
+}
diff --git a/contracts/interfaces/ITornadoProxyV1.sol b/contracts/interfaces/ITornadoProxyV1.sol
new file mode 100644
index 0000000..737af12
--- /dev/null
+++ b/contracts/interfaces/ITornadoProxyV1.sol
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.6.0;
+
+interface ITornadoProxyV1 {
+  function updateInstance(address _instance, bool _update) external;
+}
diff --git a/hardhat.config.js b/hardhat.config.js
index 7666668..b177477 100644
--- a/hardhat.config.js
+++ b/hardhat.config.js
@@ -18,7 +18,15 @@ task('accounts', 'Prints the list of accounts', async () => {
  * @type import('hardhat/config').HardhatUserConfig
  */
 const config = {
-  solidity: '0.6.12',
+  solidity: {
+    version: '0.6.12',
+    settings: {
+      optimizer: {
+        enabled: true,
+        runs: 200,
+      },
+    },
+  },
   networks: {
     hardhat: {
       blockGasLimit: 9500000,
diff --git a/test/proposal.test.js b/test/proposal.test.js
new file mode 100644
index 0000000..ec3607f
--- /dev/null
+++ b/test/proposal.test.js
@@ -0,0 +1,15 @@
+/* global ethers */
+
+const { expect } = require('chai')
+
+describe('Proposal', () => {
+  beforeEach(async function () {
+    const Proposal = await ethers.getContractFactory('Proposal')
+    const proposal = await Proposal.deploy()
+    console.log('proposal', proposal)
+  })
+
+  it('should work for even array', () => {
+    expect(2 + 2).to.be.equal(4)
+  })
+})