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Contest ran November 14November 16

3 day contest

BadgerDAO Zaps contest

Building Products to Bring BTC to DeFi.

$30,000 USDC

Total Awards

BadgerDAO Zaps contest details


ibBTC is a basket of BadgerSettToken (bTokens) These tokens can be used to mint or redeem from and into ibBTC

These are 4 zaps meant to:

  • Facilitate minting of ibBTC
  • Facilitate adding ibBTC to a Staking Vault
  • Facilitate swapping to tokenized bitcoin and bTokens (Badger Vaults Tokens) to ibBTC via Zaps
  • Providing liquidity of ibBTC in the ibBTC Curve Pool

The goal of this contest is to determine if the below listed zaps are:

  • Safe to use
  • Mathematically will provide the correct amount of tokens given the inputs

Specific care should be put in:

  • Economic exploits
  • Rug Vectors
  • Risks for the users of the zaps
  • Risks for the ibBTC Deposits

Contract Descriptions

  1. ibBTC Zap.sol Allows to mint ibBTC given tokenized bitcoin e.g. renBTC

  2. ibBTC VaultZap.sol Given ibBTC deposit wibBTC (via the wrapper, part of the previous Badger contest) to mint the Curve LP Token for the ibBTC Curve Pool

  3. ibBTC CurveZap.vy Given renBTC, mint ibBTC, use it to provide liquidity in the ibBTC Curve Pool and stake it in the ibBTC Staking Sett

  4. SettToRenIbbtcZap.sol Given a Sett Token (badger vault), use the underlying to mint ibBTC via the renBTC Zap


See this Miro Board: https://miro.com/app/board/o9J_lj8o-EM=/?invite_link_id=980480935731


Contract Link
1. ibBTC Zap.sol https://github.com/Badger-Finance/ibbtc/blob/d8b95e8d145eb196ba20033267a9ba43a17be02c/contracts/Zap.sol
2. ibBTC VaultZap.sol https://github.com/Badger-Finance/badger-ibbtc-utility-zaps/blob/6f700995129182fec81b772f97abab9977b46026/contracts/IbbtcVaultZap.sol
3. ibBTC CurveZap.vy https://github.com/Badger-Finance/ibbtc-curve-zap/blob/47a9964d17f9c5bea314d21186773aef99012153/contracts/DepositZapibBTC.vy
4. SettToRenIbbtcZap.sol https://github.com/Badger-Finance/badger-ibbtc-utility-zaps/blob/a5c71b72222d84b6414ca0339ed1761dc79fe56e/contracts/SettToRenIbbtcZap.sol

Additional Information

The wibBTC / sBTC Curve Pool: https://curve.fi/factory/60

The previous Badger Vaults Contest: https://code423n4.com/reports/2021-09-bvecvx/

The previous Badger Wrapper Contest: https://github.com/code-423n4/2021-10-badgerdao-findings - !!! Severity Ratings have yet to be judged !!!