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Tornado Instances Factory

About

This repository contains:

  1. InstanceFactory - instance factory for the creation new Tornado ERC20 pools
  2. InstanceFactoryWithRegistry - governance proposal factory for the addition of new Tornado ERC20 instances to the Tornado router

InstanceFactory

Anyone can create a new ERC20 instance by calling createInstanceClone method of the factory with parameters:

  1. address token - address of ERC20 token for a new instance
  2. uint256 denomination - denomination for new instance (tokens can only be deposited in certain denominations into instances)

InstanceFactoryWithRegistry

Anyone can create governance proposal for the addition of a new ERC20 instance by calling createProposalApprove/createProposalPermit method of the factory with parameters (proposal creation fee in TORN is charged from sender):

  1. address token - address of ERC20 token for a new instance
  2. uint24 uniswapPoolSwappingFee - fee value of Uniswap instance which will be used for TORN/token price determination. 3000 means 0.3% fee Uniswap pool.
  3. uint256[] denominations - list of denominations for each new instance (tokens can only be deposited in certain denominations into instances).
  4. uint32[] protocolFees - list of protocol fees for each new instance (this fee is only charged from registrated relayer during withdrawal process). 100 means 1% of instance denomination fee for withdrawal throw registrated relayer.

Factory parameters

InstanceFactoryWithRegistry

  1. max number of new instances in one proposal - the current version supports the addition of a maximum of 4 instances at once.
  2. proposal creation fee - this fee is charged from creator of proposal during createProposalApprove/createProposalPermit factory method execution. It can be changed by governance. Default value is stored in config.js.
  3. TWAPSlotsMin - minimum number of TWAP slots for Uniswap pool that is chosen during createProposalApprove/createProposalPermit factory method call. It can be changed by governance. Default value is stored in config.js.

Warnings

  1. This version of the factory creates a proposal for immutable Tornado instance initialization.
  2. For InstanceFactoryWithRegistry users should manually propose a proposal after its creation using the factory (in governance UI for example). As propose() method caller must have 1000 TORN locked in the governance. Moreover, the proposer can't propose more than one proposal simultaneously.

Tests

Setting up the repository:

    yarn
    cp .env.example .env

Please fill out .env according to the template provided in it. Please ensure that all of the example values are set to the correct addresses.

To run test scripts:

    yarn test

Test scripts cover instance factory deployment, proposal deployment and executing proposal.

Deploy

Check config.js for actual values.

With salt = 0x0000000000000000000000000000000000000000000000000000000047941987 address must be:

  1. MultipleInstanceFactory - 0x70A8e447E58480D68B56d88EF2C277Efe61e2b22
  2. InstanceFactoryWithRegistry - 0xCAfb424689d3995c74a854e54cD24e2Be64C33D4

Check addresses with current config:

    yarn compile
    node -e 'require("./src/generateAddresses").generateWithLog()'

Deploy MultipleInstanceFactory:

    yarn hardhat run scripts/deployMultipleInstanceFactory.js --network mainnet

Deploy InstanceFactoryWithRegistry:

    yarn hardhat run scripts/deployInstanceFactoryWithRegistry.js --network mainnet

Verify InstanceFactory on Etherscan:

    yarn hardhat verify --network <network-name> <contract-address> <constructor-arguments>