- Total Prize Pool: $60,500 USDC
- HM awards: $37,500 USDC
- QA report awards: $5,000 USDC
- Gas report awards: $2,500 USDC
- Bot race awards: $5,000 USDC
- Judge awards: $6,000 USDC
- Lookout awards: $4,000 USDC
- Scout awards: $500 USDC
- Join C4 Discord to register
- Submit findings using the C4 form
- Read our guidelines for more details
- Starts May 03, 2023 20:00 UTC
- Ends May 11, 2023 20:00 UTC
Automated findings output for the contest can be found here.
Note for C4 wardens: Anything included in the automated findings output is considered a publicly known issue and is ineligible for awards.
The Ajna protocol is a non-custodial, peer-to-peer, permissionless lending, borrowing and trading system that requires no governance or external price feeds to function. The protocol consists of pools: pairings of quote tokens provided by lenders and collateral tokens provided by borrowers. Ajna is capable of accepting fungible tokens as quote tokens and both fungible and non-fungible tokens as collateral tokens.
- Website
- Business Logic recording
- Whitepaper
- Ajna Technical Spec
- ELI5
- Technical Diagrams Pools
- Technical Diagrams Grants
| Contract | Networks |
|---|---|
RewardsManager.sol |
Ethereum mainnet, Arbitrum, Optimism, Binance Smart Chain, Polygon, Fantom, Tron, Avalanche |
PositionManager.sol |
Ethereum mainnet, Arbitrum, Optimism, Binance Smart Chain, Polygon, Fantom, Tron, Avalanche |
GrantFund.sol |
Ethereum mainnet |
| File | SLOC | Description | Libraries |
|---|---|---|---|
| Contracts (3) | |||
| ajna-grants/src/grants/GrantFund.sol | 32 | @oz/* |
|
| ajna-core/src/PositionManager.sol 🖥 Σ | 186 | This contract holds the LP position of lenders and gives them an ERC721 token representing their position in exchange | @openzeppelin/* |
| ajna-core/src/RewardsManager.sol Σ | 386 | This contract provides rewards (in Ajna token) to Ajna lenders who lock up their ERC721 position from the PositionManager.sol contract | @openzeppelin/* |
| Abstracts (3) | |||
| ajna-grants/src/grants/base/Funding.sol 🖥 🧮 Σ | 66 | @oz/* |
|
| ajna-grants/src/grants/base/ExtraordinaryFunding.sol 🧮 | 102 | @oz/* |
|
| ajna-grants/src/grants/base/StandardFunding.sol 🧮 Σ | 372 | @oz/* |
|
| Libraries (1) | |||
| ajna-grants/src/grants/libraries/Maths.sol | 38 | ||
| Interfaces (4) | |||
| ajna-grants/src/grants/interfaces/IGrantFund.sol | 21 | ||
| ajna-grants/src/grants/interfaces/IFunding.sol | 35 | ||
| ajna-grants/src/grants/interfaces/IExtraordinaryFunding.sol | 41 | ||
| ajna-grants/src/grants/interfaces/IStandardFunding.sol | 112 | ||
| Total (over 11 files): | 1391 |
- @base64-sol/base64.sol
- @clones/Clone.sol
- @clones/ClonesWithImmutableArgs.sol
- @openzeppelin/contracts/interfaces/IERC1271.sol
- @openzeppelin/contracts/security/ReentrancyGuard.sol
- @openzeppelin/contracts/token/ERC20/ERC20.sol
- @openzeppelin/contracts/token/ERC20/IERC20.sol
- @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
- @openzeppelin/contracts/token/ERC721/ERC721.sol
- @openzeppelin/contracts/token/ERC721/IERC721.sol
- @openzeppelin/contracts/utils/Address.sol
- @openzeppelin/contracts/utils/introspection/IERC165.sol
- @openzeppelin/contracts/utils/Multicall.sol
- @openzeppelin/contracts/utils/Strings.sol
- @openzeppelin/contracts/utils/structs/EnumerableSet.sol
- @oz/governance/utils/IVotes.sol
- @oz/security/ReentrancyGuard.sol
- @oz/token/ERC20/ERC20.sol
- @oz/token/ERC20/extensions/draft-ERC20Permit.sol
- @oz/token/ERC20/extensions/ERC20Burnable.sol
- @oz/token/ERC20/extensions/ERC20Votes.sol
- @oz/token/ERC20/extensions/ERC20Wrapper.sol
- @oz/token/ERC20/extensions/IERC20Metadata.sol
- @oz/token/ERC20/IERC20.sol
- @oz/token/ERC20/utils/SafeERC20.sol
- @oz/utils/Address.sol
- @oz/utils/math/SafeCast.sol
- @prb-math/contracts/PRBMathSD59x18.sol
- @prb-math/contracts/PRBMathUD60x18.sol
- If you have a public code repo, please share it here:
- [grants](https://github.com/ajna-finance/ajna-grants)
- [RewardsManager](https://github.com/ajna-finance/ajna-core/blob/main/src/RewardsManager.sol)
- [PositionsManager](https://github.com/ajna-finance/ajna-core/blob/main/src/PositionsManager.sol)
- How many contracts are in scope?: 3
- Total SLoC for these contracts?: 1191
- How many external imports are there?: 22
- How many separate interfaces and struct definitions are there for the contracts within scope?: 15 interfaces and 15 structs
- Does most of your code generally use composition or inheritance?: Inheritance
- How many external calls?: 0
- What is the overall line coverage percentage provided by your tests?: 100
- Is there a need to understand a separate part of the codebase / get context in order to audit this part of the protocol?: true
- Please describe required context: It may be helpful for auditors to gain an understanding of how positions manifest themselves as LP inside of the core pool contracts via methods like `addQuoteToken()` to better understand `PositionManager.sol`. Additionally, an understanding of reserve auctions (`kickReserveAuction()` and `takeReserves()`) will assist auditors in understanding and auditing `RewardsManager.sol`. `ajna-grants/src/grants` is relatively self encapsulating.
- Does it use an oracle?: No
- Does the token conform to the ERC20 standard?: True -> the Ajna token
- Are there any novel or unique curve logic or mathematical models?: Listed in a whitepaper
- Does it use a timelock function?: No
- Is it an NFT?: True -> in `PositionManager.sol` one is created of a user's position
- Does it have an AMM?: Swapping exists in the pool contracts but is out of scope for this audit
- Is it a fork of a popular project?: False
- Does it use rollups?:
- Is it multi-chain?: True
- Does it use a side-chain?: False
export ETH_RPC_URL='<RPC_URL_HERE>' && export QUOTE_PRECISION=18 && export COLLATERAL_PRECISION=18 && export BUCKET_INDEX_ERC20=2570 && export BUCKET_INDEX_ERC721=850 && export NO_OF_BUCKETS=3 && rm -Rf 2023-05-ajna || true && git clone https://github.com/code-423n4/2023-05-ajna.git -j8 --recurse-submodules && cd 2023-05-ajna && foundryup -v nightly-87bc53fc6c874bd4c92d97ed180b949e3a36d78c && cd ajna-grants && make test-with-gas-report && cd .. && cd ajna-core && make test-with-gas-report && cd ..
NOTE:
- install
foundryby runningfoundryup -v nightly-87bc53fc6c874bd4c92d97ed180b949e3a36d78c(this version is required due to breaking changes introduced in foundry-rs/foundry#4827) - Follow instructions in each sub repo -> Make a copy of .env.example and name it .env add the values for
ETHERSCAN_TOKEN- required by brownie to verify contract sourcesWEB3_INFURA_PROJECT_ID- required by brownie to fork chainETH_RPC_URL- required by forge to fork chainQUOTE_PRECISION- required by invariant testsCOLLATERAL_PRECISION- required by invariant testsBUCKET_INDEX_ERC20- required by invariant testsBUCKET_INDEX_ERC721- required by invariant testsNO_OF_BUCKETS- required by invariant tests
clone down and cd into the repo
git clone https://github.com/code-423n4/2023-05-ajna.git && cd 2023-05-ajna
cd into sub repo:
cd ajna-grants
To run unit tests:
make tests
To run unit tests with gas report:
make test-with-gas-report
cd into sub repo:
cd ajna-core
To run unit tests:
make test
To run unit tests with gas report:
make test-with-gas-report
| Issue | File Effected | Reason / Explanation |
|---|---|---|
| Arbitrary from in transferFrom | src/base/FlashloanablePool.sol#48-52 | Implemented as designed so auctions can be atomically swapped |
| Incorrect ERC20 function interface | src/interfaces/pool/IPool.sol#57-61 | Non-issue believe to be slither related |
| Dangerous strict equalities | src/base/Pool.sol#384 | Implemented as designed to restrict contract surface area |
| Dead code | src/base/FlashloanablePool.sol#89-93 | dead code is from the abstract contract, implemented by concrete contracts |
| State variables that could be declared immutable | src/ERC20PoolFactory.sol#25 | Limits Ajna to specific chain, no action |
| State variables that could be declared immutable | src/base/PoolDeployer.sol#19 | Limits Ajna to specific chain, no action |
| Known Contracts That Exceed Spurious Dragon Req |
|---|
| src/ERC20PoolFactory.sol |
| src/ERC20Pool.sol |
| src/RewardsManager.sol |
| src/PositionManager.sol |
| src/ERC721PoolFactory.sol |
| src/ERC721Pool.sol |
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