Tornado Instances Factory

About

This repository contains:

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

InstanceFactory

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

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

InstanceProposalCreator

Anyone can create governance proposal for the addition of a new 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, zero address for the native 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. Zero value for the native instance.
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

InstanceProposalCreator

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 InstanceProposalCreator 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. SidechainInstanceFactory - 0xE24B853247B37375A080553082a5385Dda95E8cf
2. SidechainInstanceFactory proxy - 0x168de886aC22e73b3306e234579794340a0eb746
3. InstanceFactory - 0x8B85eB475Ac8D286DcF307346a6EAE9E9c93665d
4. InstanceFactory proxy - 0xf30827C1588b17ABAeF855DF92bf6B60615F3e9C
5. InstanceProposalCreator - 0xe1FcF99262F00cCbe2CE6cC70CE956C7e5728C10
6. InstanceProposalCreator proxy - 0xa9189801C88fe8222001d2ee962A6A4150DB6026

Check addresses with current config:

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

Deploy SidechainInstanceFactory:

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

Deploy InstanceProposalCreator:

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

Verify on Etherscan:

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