Tally Contest 🐕
Meet Tally, the community owned and operated Web3 wallet. In this contest, we're looking at Tally Swap, the 0x-based DEX aggregator embedded in the wallet.
Tally contest details
- $28,500 worth of ETH award pot
- $1,500 worth of ETH gas optimization award pot
- Join C4 Discord to register
- Submit findings using the C4 form
- Read our guidelines for more details
- Starts October 20, 2021 00:00 UTC
- Ends October 22, 2021 23:59 UTC
Useful links ⭐️
🐕 tally.cash — 🐦 @tallycash — 🤖 Discord
Quickstart
To build the contracts, run
yarn install yarn build
Contract overview
| Contract Name | Lines of Code |
|---|---|
Swap.sol | 263 |
Math.sol | 20 |
EmergencyGovernable.sol | 64 |
EmergencyPausable.sol | 26 |
MockZrxExchangeProxy.sol | 73 |
MockToken.sol | 9 |
| Total | 455 |
Dependencies
The main contract is Swap.sol, which executes quotes provided off-chain by the
0x API in the Tally wallet, taking swap fees for the
DAO. It relies on SafeMath.sol, SafeERC20.sol, and ReentrancyGuard.sol
from the OpenZeppelin contracts library.
System overview
The Tally wallet is an EOA wallet that runs as a browser extension. Though Tally isn't a "smart contract wallet", preferring to custody user funds outside smart contracts to save on gas, a number of features in the wallet require paired smart contracts. Tally Swap is one of those features.