# Deployed Contracts Registry Below is a list of relevant smart contracts and Github repositories for using and interacting with the Yearn product suite. ## Token Contracts ### YFI The Yearn ecosystem is controlled by YFI token holders who submit and vote on proposals that govern the ecosystem. | Token | Address | | ---------------------------------------------------------------------------- | ------------------------------------------ | | [YFI](https://etherscan.io/token/0x0bc529c00c6401aef6d220be8c6ea1667f6ad93e) | 0x0bc529c00c6401aef6d220be8c6ea1667f6ad93e | ### v2 Yield Tokens The v2 yield tokens can be used in one lender at a time. Currently being used on Curve’s Y Pool, Yearn’s yBTC pool and sUSD pool. | Token | Address | Github | | ---------------------------------------------------------------------------------- | ------------------------------------------ | ---------------------------------------------------------------------------------------- | | [yDAIv2](https://etherscan.io/address/0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01) | 0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01 | [YDAIv2.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YDAIv2.sol) | | [yUSDCv2](https://etherscan.io/address/0xd6aD7a6750A7593E092a9B218d66C0A814a3436e) | 0xd6aD7a6750A7593E092a9B218d66C0A814a3436e | [YUSDCv2.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YUSDCv2.sol) | | [yUSDTv2](https://etherscan.io/address/0x83f798e925BcD4017Eb265844FDDAbb448f1707D) | 0x83f798e925BcD4017Eb265844FDDAbb448f1707D | [YUSDTv2.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YUSDTv2.sol) | | [ysUSDv2](https://etherscan.io/address/0xF61718057901F84C4eEC4339EF8f0D86D2B45600) | 0xF61718057901F84C4eEC4339EF8f0D86D2B45600 | [YSUSDv2.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YSUSDv2.sol) | | [yTUSDv2](https://etherscan.io/address/0x73a052500105205d34daf004eab301916da8190f) | 0x73a052500105205d34daf004eab301916da8190f | [YTUSDv2.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YTUSDv2.sol) | | [yWBTCv2](https://etherscan.io/address/0x04Aa51bbcB46541455cCF1B8bef2ebc5d3787EC9) | 0x04Aa51bbcB46541455cCF1B8bef2ebc5d3787EC9 | [YWBTCv2.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YWBTCv2.sol) | ### v3 Yield Tokens The v3 yield tokens allow the underlying assets to be spread across multiple lenders. Currently being used on Curve’s BUSD pool. | Token | Address | Github | | ---------------------------------------------------------------------------------- | ------------------------------------------ | ---------------------------------------------------------------------------------------- | | [yDAIv3](https://etherscan.io/address/0xC2cB1040220768554cf699b0d863A3cd4324ce32) | 0xC2cB1040220768554cf699b0d863A3cd4324ce32 | [YDAIv3.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YDAIv3.sol) | | [yUSDCv3](https://etherscan.io/address/0x26EA744E5B887E5205727f55dFBE8685e3b21951) | 0x26EA744E5B887E5205727f55dFBE8685e3b21951 | [YUSDCv3.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YUSDCv3.sol) | | [yUSDTv3](https://etherscan.io/address/0xE6354ed5bC4b393a5Aad09f21c46E101e692d447) | 0xE6354ed5bC4b393a5Aad09f21c46E101e692d447 | [YUSDCv3.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YUSDCv3.sol) | | [yBUSDv3](https://etherscan.io/address/0x04bC0Ab673d88aE9dbC9DA2380cB6B79C4BCa9aE) | 0x04bC0Ab673d88aE9dbC9DA2380cB6B79C4BCa9aE | [YBUSDv3.sol](https://github.com/iearn-finance/itoken/blob/master/contracts/YBUSDv3.sol) | ## Vault Contracts Vaults follow unique strategies that are designed to maximize yield of the deposited asset and minimize risk. The vaults are maintained by a `Controller` which oversees the strategy execution. Strategies' generated profits are used to buy respective vault underlying asset. The `Controller` contract can be found [here](https://etherscan.io/address/0x9e65ad11b299ca0abefc2799ddb6314ef2d91080#code) and the source code can be found [here](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/controllers/Controller.sol). ### Vaults | Vault | Address | GitHub | | ------------------------------------------------------------------------------------------------- | ------------------------------------------ | ------------------------------------------------------------------------------------------------------ | | [WETH](https://etherscan.io/address/0xe1237aa7f535b0cc33fd973d66cbf830354d16c7) | 0xe1237aa7f535b0cc33fd973d66cbf830354d16c7 | [yWETH.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yWETH.sol) | | [YFI](https://etherscan.io/address/0xba2e7fed597fd0e3e70f5130bcdbbfe06bb94fe1) | 0xba2e7fed597fd0e3e70f5130bcdbbfe06bb94fe1 | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [curve.fi/3pool LP](https://etherscan.io/address/0x9cA85572E6A3EbF24dEDd195623F188735A5179f#code) | 0x9cA85572E6A3EbF24dEDd195623F188735A5179f | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [curve.fi/y LP](https://etherscan.io/address/0x5dbcf33d8c2e976c6b560249878e6f1491bca25c) | 0x5dbcf33d8c2e976c6b560249878e6f1491bca25c | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [curve.fi/busd LP](https://etherscan.io/address/0x2994529c0652d127b7842094103715ec5299bbed) | 0x2994529c0652d127b7842094103715ec5299bbed | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [curve.fi/sbtc LP](https://etherscan.io/address/0x7ff566e1d69deff32a7b244ae7276b9f90e9d0f6) | 0x7ff566e1d69deff32a7b244ae7276b9f90e9d0f6 | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [DAI](https://etherscan.io/address/0xacd43e627e64355f1861cec6d3a6688b31a6f952) | 0xacd43e627e64355f1861cec6d3a6688b31a6f952 | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [TUSD](https://etherscan.io/address/0x37d19d1c4e1fa9dc47bd1ea12f742a0887eda74a) | 0x37d19d1c4e1fa9dc47bd1ea12f742a0887eda74a | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [USDC](https://etherscan.io/address/0x597ad1e0c13bfe8025993d9e79c69e1c0233522e) | 0x597ad1e0c13bfe8025993d9e79c69e1c0233522e | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [USDT](https://etherscan.io/address/0x2f08119c6f07c006695e079aafc638b8789faf18) | 0x2f08119c6f07c006695e079aafc638b8789faf18 | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | | [GUSD](https://etherscan.io/address/0xec0d8d3ed5477106c6d4ea27d90a60e594693c90) | 0xec0d8d3ed5477106c6d4ea27d90a60e594693c90 | [yVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yVault.sol) | ### Strategies | Strategy | Address | GitHub | Vault | | ------------------------------------------------------------------------------------------------------ | ------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [StrategyCurve3CrvVoterProxy](https://etherscan.io/address/0xC59601F0CC49baa266891b7fc63d2D5FE097A79D) | 0xC59601F0CC49baa266891b7fc63d2D5FE097A79D | [StrategyCurve3CrvVoterProxy.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyCurve3CrvVoterProxy.sol) | [curve.fi/3pool LP](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0xe1237aa7f535b0cc33fd973d66cbf830354d16c7/README.md) | | [StrategyMKRVaultDAIDelegate](https://etherscan.io/address/0x932fc4fd0eee66f22f1e23fba74d7058391c0b15) | 0x932fc4fd0eee66f22f1e23fba74d7058391c0b15 | [StrategyMKRVaultDAIDelegate.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyMKRVaultDAIDelegate.sol) | [WETH](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0xe1237aa7f535b0cc33fd973d66cbf830354d16c7/README.md) | | [StrategyYFIGovernance](https://etherscan.io/address/0x395f93350d5102b6139abfc84a7d6ee70488797c) | 0x395f93350d5102b6139abfc84a7d6ee70488797c | [StrategyYFIGovernance.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyYFIGovernance.sol) | [YFI](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0xba2e7fed597fd0e3e70f5130bcdbbfe06bb94fe1/README.md) | | [StrategyCurveYCRVVoter](https://etherscan.io/address/0xc999fb87aca383a63d804a575396f65a55aa5ac8) | 0xc999fb87aca383a63d804a575396f65a55aa5ac8 | [StrategyCurveYCRVVoter.sol](https://github.com/iearn-finance/yearn-protocol/blob/master/contracts/strategies/StrategyCurveYCRVVoter.sol) | [curve.fi/y LP](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0x5dbcf33d8c2e976c6b560249878e6f1491bca25c/README.md) | | [StrategyCurveYBUSD](https://etherscan.io/address/0xb15ee8e74dac2d77f9d1080b32b0f3562954aee9) | 0xb15ee8e74dac2d77f9d1080b32b0f3562954aee9 | [StrategyCurveYBUSD.sol](https://github.com/iearn-finance/yearn-protocol/blob/master/contracts/strategies/StrategyCurveYBUSD.sol) | [curve.fi/busd LP](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0x2994529c0652d127b7842094103715ec5299bbed/README.md) | | [StrategyCurveSBTC](https://etherscan.io/address/0x4feeaeced575239b46d70b50e13532ecb62e4ea8) | 0x4feeaeced575239b46d70b50e13532ecb62e4ea8 | [StrategyCurveSBTC.sol](https://github.com/iearn-finance/yearn-protocol/blob/master/contracts/strategies/StrategyCurveSBTC.sol) | [curve.fi/sbtc LP](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0x7ff566e1d69deff32a7b244ae7276b9f90e9d0f6/README.md) | | [StrategyDAICurve](https://etherscan.io/address/0xaa880345a3147a1fc6889080401c791813ed08dc) | 0xaa880345a3147a1fc6889080401c791813ed08dc | [StrategyDAICurve.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyDAICurve.sol) | [DAI](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0xacd43e627e64355f1861cec6d3a6688b31a6f952/README.md) | | [StrategyTUSDCurve](https://etherscan.io/address/0x1d91e3f77271ed069618b4ba06d19821bc2ed8b0) | 0x1d91e3f77271ed069618b4ba06d19821bc2ed8b0 | [StrategyTUSDCurve.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyTUSDCurve.sol) | [TUSD](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0x37d19d1c4e1fa9dc47bd1ea12f742a0887eda74a/README.md) | | [StrategyDForceUSDC](https://etherscan.io/address/0xa30d1d98c502378ad61fe71bcdc3a808cf60b897) | 0xa30d1d98c502378ad61fe71bcdc3a808cf60b897 | [StrategyDForceUSDC.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyDForceUSDC.sol) | [USDC](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0x597ad1e0c13bfe8025993d9e79c69e1c0233522e/README.md) | | [StrategyDForceUSDT](https://etherscan.io/address/0x787c771035bde631391ced5c083db424a4a64bd8) | 0x787c771035bde631391ced5c083db424a4a64bd8 | [StrategyDForceUSDT.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyDForceUSDT.sol) | [USDT](https://github.com/iearn-finance/docs/tree/5f148a7f8cc45771355a6f1319460f75b8304567/developers/0x2f08119c6f07c006695e079aafc638b8789faf18/README.md) | ## Delegated Vault Contracts Volatile assets can also participate in yield farming strategies as part of the Delegated Vaults. Currently, there is only one Delegated Vault: aLINK. The `Controller` deposits LINK into AAVE and borrows stable coins (USDC). The initial health factor of these loans is always above 4, and if the health factor drops below 4 at any time the `Controller` repays a portion of the debt in order to maintain a health factor above 4. The stable coins borrowed (e.g., USDC, DAI, USDT, etc.) depend on the strategy selected by the `Controller`. After obtaining stable coins the `Controller` will deposit them into one of the yVaults identified above. The aLINK vault uses the `StrategyControllerV2` [contract](https://etherscan.io/address/0x2be5d998c95de70d9a38b3d78e49751f10f9e88b#code). The source code for `StrategyControllerV2` is [here](https://github.com/iearn-finance/vaults/blob/master/contracts/controllers/StrategyControllerV2.sol). | Strategy | Strategy | GitHub | | -------------------------------------------------------------------------------------------- | ------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------- | | [StrategyVaultUSDC](https://etherscan.io/address/0x25faca21dd2ad7edb3a027d543e617496820d8d6) | 0x25faca21dd2ad7edb3a027d543e617496820d8d6 | [StrategyVaultUSDC.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/strategies/StrategyVaultUSDC.sol) | | Vault | Address | GitHub | | -------------------------------------------------------------------------------- | ------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------ | | [aLINK](https://etherscan.io/address/0x29e240cfd7946ba20895a7a02edb25c210f9f324) | 0x29e240cfd7946ba20895a7a02edb25c210f9f324 | [yDelegatedVault.sol](https://github.com/iearn-finance/yearn-protocol/blob/develop/contracts/vaults/yDelegatedVault.sol) | ## Governance Contracts YFI holders govern the Yearn ecosystem and are eligible to receive a portion of protocol profits. Therefore, YFI represents a right to govern the platform and a claim on earnings. Profits are obtained from each of Yearn's products. In order to claim profits, YFI holders stake their tokens into the Governance contract. | Contract | Status | Address | | -------------------------------------------------------------------------------------------------------------- | ------ | ------------------------------------------ | | [Governance Staking (v2)](https://etherscan.io/address/0xba37b002abafdd8e89a1995da52740bbc013d992#code) | Live | 0xba37b002abafdd8e89a1995da52740bbc013d992 | | [YearnGovernance (Balancer v1)](https://etherscan.io/address/0x3a22df48d84957f907e67f4313e3d43179040d6e#code) | Old | 0x3a22df48d84957f907e67f4313e3d43179040d6e | | [YearnRewards (Yearn v1)](https://etherscan.io/address/0x0001fb050fe7312791bf6475b96569d83f695c9f#code) | Old | 0x0001fb050fe7312791bf6475b96569d83f695c9f | | [YearnRewards (Balancer v1)](https://etherscan.io/address/0x033e52f513f9b98e129381c6708f9faa2dee5db5#code) | Old | 0x033e52f513f9b98e129381c6708f9faa2dee5db5 | | [YearnRewards (Gov. Staking v1)](https://etherscan.io/address/0xb01419e74d8a2abb1bbad82925b19c36c191a701#code) | Old | 0xb01419e74d8a2abb1bbad82925b19c36c191a701 | ## Status and Info Contracts | Utility | Summary | | ------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [YRegistry](https://etherscan.io/address/0x3ee41c098f9666ed2ea246f4d2558010e59d63a0#code) | The Vault Registry is the single source of truth for active Yearn vaults. The registry allows users to query for active Yearn vaults and vault metadata (details [here](https://hackmd.io/JDWZ6BAuSmm-VRQRp-bZXw#Vault-Registry-)). | | [UniswapROI](https://etherscan.io/address/0xd04ca0ae1cd8085438fdd8c22a76246f315c2687#code) | On-chain uniswap pool ROI calculator | | [APROracle](https://etherscan.io/address/0x97ff4a1b787ade6b94cca95b61f79417c673331d#code) | Allows on-chain rate comparison between Compound, Fulcrum, Aave, and dYdX. | | [UniswapAPR](https://etherscan.io/address/0x4c70D89A4681b2151F56Dc2c3FD751aBb9CE3D95#code) | An on-chain uniswap pool APR calculator. It calculates all values in ETH adjusted for the last year. | | [IEarnAPR](https://etherscan.io/address/0x9cad8ab10daa9af1a9d2b878541f41b697268eec#code) | Contract for on-chain APR decision trees between Compound, Fulcrum, Aave, and dYdX. | | [IEarnManager](https://etherscan.io/address/0x318135fbd0b40d48fcef431ccdf6c7926450edfb#code) | On-chain stateless execution. Recommendations based on IearnAPR. | | [APRWithPoolOracle](https://etherscan.io/address/0xAE8F37F0e8AD690486bFA2495113d7E94B7a7Ba6#code) | APR used for stateless `recommend()` function. Can be used to change the recommended provider. | | [IEarnAPRWithPool](https://etherscan.io/address/0xcD5F61c392B61F440991DEf98FF6Af07FC6900D4#code) | APR used for stateless `recommend()` function. Can be used to change the recommended provider. | ## Utility Contracts | Utility | Address | | --------------------------------------------------------------------------------------------- | ------------------------------------------ | | [Curve's yPool](https://etherscan.io/address/0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8#code) | 0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8 |