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‎basic/35-dune-analytics-nansen/readme.md‎

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contract_address = '\xc36442b4a4522e871399cd717abdd847ab11fe88';
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```
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### mastering-chain-analytics
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https://sixdegreelab.gitbook.io/mastering-chain-analytics/
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入门教程：https://0xbi.mirror.xyz/6cbedGOx0GwZdvuxHeyTAgn333jaT34y-2qryvh8Fio
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## 参考链接
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- 视频：https://www.bilibili.com/video/BV1ZK4y137Ce

‎defi/Curve-V2/crvusd.md‎

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## Crvusd
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## 参考链接
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Curve Stablecoin 非权威解读： https://paco0x.org/curve-stablecoin/
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From Uniswap v3 to crvUSD LLAMMA: https://0xreviews.xyz/

‎defi/instadapp/code.md‎

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# Instadapp
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## code analysis
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1. InstaIndex: This is the Main Contract for all the Defi Smart Accounts. Used to create a new Defi Smart Account for a user and run a cast function in the new smart account.
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2. InstaImplementationM1: This contract contains most core functions of smart account name cast(). It is only called by owners of smart accounts and has full-fledge access over the smart account. Used also to access all the DSA.
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3. build(owner, accountVersion, _origin)
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Create a DSA Account using this function. It returns the address of the DSA account created.
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4. cast(_targets, _datas, _origin)
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Using cast() user can access the connectors, which allows the smart account to interact with protocols or set up any settings on the smart account.
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Connectors are standard proxy logics contract that let DeFi Smart Account (DSA) interact with various smart contracts, and make the important actions accessible like cross protocol interoperability.
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- Index: This is the Main Contract for all the DeFi Smart Accounts. Used for creating a new DeFi Smart Account of a user and to run a cast function in the new smart account.
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- InstaList: Maintains a registry of all the DeFi Smart Account users using a Linked List. Using the user’s address, a smart account Id is created which is later mapped to get a smart account address. With this address, an account link is created which is utilised to add and remove accounts from the LinkedList.
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- InstaAccounts: It’s the DeFi Smart Account Wallet. All smart accounts that are created are a clone of this contract.
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- InstaConnectors: Holds a registry of all the Connectors associated with InstaDapp. An array of all the connectors is maintained using their address.
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- InstaMemory: All the data (bytes, uint, address and Storage Id) for the cast function are stored in this contract.
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# instadapp lite
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## v1 code analysis
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usr -> ieth -> DSA -> aave
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User interaction contract: 0x8140725f7bda9484e20a86b9ed76cd39748824d6 ethwrapper
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**iETH v1:**
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0xc383a3833a87009fd9597f8184979af5edfad019 (system parameters)
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Implement: https://etherscan.io/address/0x79a043f68547dff57f4f5f30115d76bf01e8fdfc#code
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code: https://etherscan.deth.net/address/0x79a043f68547dff57f4f5f30115d76bf01e8fdfc#code
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vaultDSA: 0x94269A09c5Fcbd5e88F9DF13741997bc11735a9c
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Rebalance contract: https://etherscan.io/address/0xcfcdb64a551478e07bd07d17cf1525f740173a35#code
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#### supply 方法：
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1. 如果是eth，则将将eth在1inch兑换成steth
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2. 调用ethVault.supply方法，传入steth数量，返回itoken数量；
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3. InstaVault： 0xc383a3833A87009fD9597F8184979AF5eDFad019
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主要调用supplyInternal 方法
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- getCurrentExchangePrice 获取当前的ieth的兑换率；并更新当前的ieth兑换率以及协议收益revenue；
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- vtokenAmount_ = (amount_ * 1e18) / exchangePrice_; mint出vtokenAmount_数量发送给用户。
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### withdraw方法：
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withdraw(uint256 amount_, address to_)
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1. 调用withdrawInternal(amount_, to_, false);
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- getCurrentExchangePrice获取当前汇率
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- updateStorage(exchangePrice_, newRevenue_) 更新汇率以及协议收益revenue;
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- 根据汇率计算出可提steth数量
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- burn itoken
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- 收取万一的withdraw fee，得出最终可提数量，
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调用 withdrawFinal(uint256 amount_, bool afterDeleverage_) 方法
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- 调用netAssets()，获取vault和 vaultDSA 各自steth,weth余额；
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- 如果afterDeleverage_为false， 则保证金率需要5%以上， 如果为true，保证金率需要10%以上，maxLimit最大负债率为72%；
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- 计算最大可借债务：colCoveringDebt_ = ((netBorrow_ * 10000) /(ratios.maxLimit - margin_));
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- 检查用户可提取amount需要小于balances_.totalBal + netCollateral_ - colCoveringDebt_，即系统最大可提取金额；
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- 提款顺序： 优先提vault的weth， steth, 再提 vaultDSA的weth， steth, 然后从借贷协议取； 计算出各个vault可提取transferAmts_[5]；
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- 调用withdrawTransfers(uint256 amount_, uint256[] memory transferAmts_)
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returns (uint256 wethAmt_, uint256 stEthAmt_) 执行转账操作，返回要转的weth和steth金额；aave提取的钱以及vaultDSA的钱都会返回到vault合约。最后由vault合约转给用户；
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- 调用validateFinalRatio检查协议安全系数； maxIsOk_，以及hfIsOk_；
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- 如果afterDeleverage_是true，还要检查minGapIsOk_， 是否满足最小借债率要求；
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### leverage 方法
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function leverage(uint256 amt_) external nonReentrant
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// If ratio is below then this function will allow anyone to swap from steth -> weth. seth->weth
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1. 扣除swapfee后（目前是0）， 用户转入amt_ 的steth;
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2. 计算vault当前weth，以及steth数量；
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3. 如果weth充足，直接转给用户weth； 函数返回
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4. 如果不足，则将vault的所有steth充入vaultDsa，然后将steth一起deposit到aave，borrow剩余的weth，返回给用户；
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5. 并检查validateFinalRatio。 maxIsOk_，minIsOk_最大和最小负债率。
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### deleverage 方法
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function deleverage(uint256 amt_) external nonReentrant
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//If ratio is above then this function will allow anyone to payback WETH and withdraw astETH to msg.sender at 1:1 ratio.
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// weth -> steth, 减少池子在aave的债务。
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1. 调用deleverageInternal方法，
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- vault合约将用户的weth转入到vaultDSA;
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- 先偿还aave上amt的的weth债务，
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- 如果不是DSA，直接从aave提取加上deleverage fee的amt weth， 然后转steth给用户。
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- 如果用户是DSA，则从vaultDSA直接提取astethToken给用户。
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2. 检查validateFinalRatio。 minGapIsOk_最小负债率
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### rebalanceOne
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方法：leverage and rebalance the position.增加负债，平衡仓位；
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rebalanceOne(
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address flashTkn_,
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uint256 flashAmt_,
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uint256 route_, // flashloan route
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address[] memory vaults_, // leverage using other vaults
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uint256[] memory amts_,
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uint256 excessDebt_, //增加债务 weth
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uint256 paybackDebt_, //减少债务 weth
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uint256 totalAmountToSwap_, // 1inch swap steth ->weth
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uint256 extraWithdraw_, //提款
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uint256 unitAmt_, //swap slippage
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bytes memory oneInchData_
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)
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1. functionDelegateCall 方法rebalancerModuleAddr： https://etherscan.io/address/0xcfcdb64a551478e07bd07d17cf1525f740173a35#code
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2. 一系列检查， 不能同时增加债务和偿还债务， 不能同时swap和偿还债务，
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3. getIdealBalances 获取vault和vaultDSA weth,steth空余余额,以及闲置总余额；
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4. 如果weth，steth大于0.0001， 转入到vaultDSA;
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5. 如果是excessDebt_，增加债务，在aave存入flashTkn_，flashAmt_借出excessDebt_ weth债务，
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如果vaults_不为空；
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循环调用vaults的deleverage方法，转入weth，换取steth，帮助 vaults降低杠杆；
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如果totalAmountToSwap_不为空，则调用1inch接口，卖出stEthAddr换steth，然后存入aave。
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excessDebt_存在，则从aave再withdraw flashTkn_,flashAmt_, 然后flashPayback。偿还闪电贷。
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6. 检查validateFinalRatio
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### rebalanceOne
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// 调仓使得仓位更安全， 方便用户退出，
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function rebalanceTwo(
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uint256 withdrawAmt_,
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address flashTkn_,
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uint256 flashAmt_,
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uint256 route_,
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uint256 totalAmountToSwap_,
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uint256 unitAmt_,
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bytes memory oneInchData_
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) external
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1. validateFinalRatio()获取hf，安全则设置2%滑点，不安全5%
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2. getIdealBalances 获取vault和vaultDSA weth,steth空余余额,以及闲置总余额；
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3. 将空闲资金转入vaultDSA;
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4. 使用闪电贷，卖出steth，买入weth；偿还债务
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5. 检查validateFinalRatio
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## instadapp lite v2 code analysis
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v2 function description
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1. ERC-4626 Standard
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2. Multi-protocol Strategy
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3. Improved Withdrawals
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4. Rebalancers
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The Rebalancer can carry out the following transactions on the vault:
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- deposit
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deposit assets from the vault into a protocol whenever the vault has excess deposit
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- withdraw
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withdraw assets from protocol back to vault; It can only happen as per the max ratios;
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- leverage
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leveraging the assets to earn greater yield as per the max ratio
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- Refinance
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move assets between protocols;
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When you deleverage the vault, the vault unwinds by selling stETH collateral to repay ETH debt. When issuing a deleverage there will be increased gas costs as the transaction uses a flashloan to unwind the vault and withdraw your deposit.
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**for User**
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Deleveraging: If for any reason there is not enough liquidity in the withdraw pool or you want to withdraw more than is available, you still redeem your balance by forcing a deleverage to the vault.
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**iETH v2**
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0xA0D3707c569ff8C87FA923d3823eC5D81c98Be78
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Implement: https://etherscan.io/address/0x172455d14d1eb242e6f7f3b451529ab289095bb6#code
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## Reference
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- Introducing Lite v2: https://blog.instadapp.io/introducing-lite-v2/

‎defi/instadapp/readme.md‎

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# Instadapp
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33

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## code analysis
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1. InstaIndex: This is the Main Contract for all the Defi Smart Accounts. Used to create a new Defi Smart Account for a user and run a cast function in the new smart account.
6-
7-
2. InstaImplementationM1: This contract contains most core functions of smart account name cast(). It is only called by owners of smart accounts and has full-fledge access over the smart account. Used also to access all the DSA.
8-
9-
3. build(owner, accountVersion, _origin)
10-
Create a DSA Account using this function. It returns the address of the DSA account created.
11-
12-
4. cast(_targets, _datas, _origin)
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Using cast() user can access the connectors, which allows the smart account to interact with protocols or set up any settings on the smart account.
14-
15-
16-
Connectors are standard proxy logics contract that let DeFi Smart Account (DSA) interact with various smart contracts, and make the important actions accessible like cross protocol interoperability.
17-
18-
19-
20-
- Index: This is the Main Contract for all the DeFi Smart Accounts. Used for creating a new DeFi Smart Account of a user and to run a cast function in the new smart account.
21-
22-
- InstaList: Maintains a registry of all the DeFi Smart Account users using a Linked List. Using the user’s address, a smart account Id is created which is later mapped to get a smart account address. With this address, an account link is created which is utilised to add and remove accounts from the LinkedList.
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24-
- InstaAccounts: It’s the DeFi Smart Account Wallet. All smart accounts that are created are a clone of this contract.
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- InstaConnectors: Holds a registry of all the Connectors associated with InstaDapp. An array of all the connectors is maintained using their address.
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- InstaMemory: All the data (bytes, uint, address and Storage Id) for the cast function are stored in this contract.
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# instadapp lite
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## v1 code analysis
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35-
usr -> ieth -> DSA -> aave
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User interaction contract: 0x8140725f7bda9484e20a86b9ed76cd39748824d6 ethwrapper
37-
**iETH v1:**
38-
0xc383a3833a87009fd9597f8184979af5edfad019 (system parameters)
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Implement: https://etherscan.io/address/0x79a043f68547dff57f4f5f30115d76bf01e8fdfc#code
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code: https://etherscan.deth.net/address/0x79a043f68547dff57f4f5f30115d76bf01e8fdfc#code
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vaultDSA: 0x94269A09c5Fcbd5e88F9DF13741997bc11735a9c
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Rebalance contract: https://etherscan.io/address/0xcfcdb64a551478e07bd07d17cf1525f740173a35#code
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44-
45-
46-
#### supply 方法：
47-
1. 如果是eth，则将将eth在1inch兑换成steth
48-
2. 调用ethVault.supply方法，传入steth数量，返回itoken数量；
49-
3. InstaVault： 0xc383a3833A87009fD9597F8184979AF5eDFad019
50-
主要调用supplyInternal 方法
51-
- getCurrentExchangePrice 获取当前的ieth的兑换率；并更新当前的ieth兑换率以及协议收益revenue；
52-
- vtokenAmount_ = (amount_ * 1e18) / exchangePrice_; mint出vtokenAmount_数量发送给用户。
53-
54-
55-
### withdraw方法：
56-
withdraw(uint256 amount_, address to_)
57-
1. 调用withdrawInternal(amount_, to_, false);
58-
- getCurrentExchangePrice获取当前汇率
59-
- updateStorage(exchangePrice_, newRevenue_) 更新汇率以及协议收益revenue;
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- 根据汇率计算出可提steth数量
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- burn itoken
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- 收取万一的withdraw fee，得出最终可提数量，
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调用 withdrawFinal(uint256 amount_, bool afterDeleverage_) 方法
64-
- 调用netAssets()，获取vault和 vaultDSA 各自steth,weth余额；
65-
- 如果afterDeleverage_为false， 则保证金率需要5%以上， 如果为true，保证金率需要10%以上，maxLimit最大负债率为72%；
66-
- 计算最大可借债务：colCoveringDebt_ = ((netBorrow_ * 10000) /(ratios.maxLimit - margin_));
67-
- 检查用户可提取amount需要小于balances_.totalBal + netCollateral_ - colCoveringDebt_，即系统最大可提取金额；
68-
- 提款顺序： 优先提vault的weth， steth, 再提 vaultDSA的weth， steth, 然后从借贷协议取； 计算出各个vault可提取transferAmts_[5]；
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- 调用withdrawTransfers(uint256 amount_, uint256[] memory transferAmts_)
70-
returns (uint256 wethAmt_, uint256 stEthAmt_) 执行转账操作，返回要转的weth和steth金额；aave提取的钱以及vaultDSA的钱都会返回到vault合约。最后由vault合约转给用户；
71-
72-
- 调用validateFinalRatio检查协议安全系数； maxIsOk_，以及hfIsOk_；
73-
- 如果afterDeleverage_是true，还要检查minGapIsOk_， 是否满足最小借债率要求；
74-
75-
76-
77-
### leverage 方法
78-
function leverage(uint256 amt_) external nonReentrant
79-
// If ratio is below then this function will allow anyone to swap from steth -> weth. seth->weth
80-
1. 扣除swapfee后（目前是0）， 用户转入amt_ 的steth;
81-
2. 计算vault当前weth，以及steth数量；
82-
3. 如果weth充足，直接转给用户weth； 函数返回
83-
4. 如果不足，则将vault的所有steth充入vaultDsa，然后将steth一起deposit到aave，borrow剩余的weth，返回给用户；
84-
5. 并检查validateFinalRatio。 maxIsOk_，minIsOk_最大和最小负债率。
85-
86-
87-
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### deleverage 方法
89-
function deleverage(uint256 amt_) external nonReentrant
90-
//If ratio is above then this function will allow anyone to payback WETH and withdraw astETH to msg.sender at 1:1 ratio.
91-
// weth -> steth, 减少池子在aave的债务。
92-
1. 调用deleverageInternal方法，
93-
- vault合约将用户的weth转入到vaultDSA;
94-
- 先偿还aave上amt的的weth债务，
95-
- 如果不是DSA，直接从aave提取加上deleverage fee的amt weth， 然后转steth给用户。
96-
- 如果用户是DSA，则从vaultDSA直接提取astethToken给用户。
97-
2. 检查validateFinalRatio。 minGapIsOk_最小负债率
98-
99-
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### rebalanceOne
101-
方法：leverage and rebalance the position.增加负债，平衡仓位；
102-
rebalanceOne(
103-
address flashTkn_,
104-
uint256 flashAmt_,
105-
uint256 route_, // flashloan route
106-
address[] memory vaults_, // leverage using other vaults
107-
uint256[] memory amts_,
108-
uint256 excessDebt_, //增加债务 weth
109-
uint256 paybackDebt_, //减少债务 weth
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uint256 totalAmountToSwap_, // 1inch swap steth ->weth
111-
uint256 extraWithdraw_, //提款
112-
uint256 unitAmt_, //swap slippage
113-
bytes memory oneInchData_
114-
)
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116-
1. functionDelegateCall 方法rebalancerModuleAddr： https://etherscan.io/address/0xcfcdb64a551478e07bd07d17cf1525f740173a35#code
117-
2. 一系列检查， 不能同时增加债务和偿还债务， 不能同时swap和偿还债务，
118-
3. getIdealBalances 获取vault和vaultDSA weth,steth空余余额,以及闲置总余额；
119-
4. 如果weth，steth大于0.0001， 转入到vaultDSA;
120-
5. 如果是excessDebt_，增加债务，在aave存入flashTkn_，flashAmt_借出excessDebt_ weth债务，
121-
如果vaults_不为空；
122-
循环调用vaults的deleverage方法，转入weth，换取steth，帮助 vaults降低杠杆；
123-
如果totalAmountToSwap_不为空，则调用1inch接口，卖出stEthAddr换steth，然后存入aave。
124-
excessDebt_存在，则从aave再withdraw flashTkn_,flashAmt_, 然后flashPayback。偿还闪电贷。
125-
6. 检查validateFinalRatio
126-
127-
128-
129-
### rebalanceOne
130-
// 调仓使得仓位更安全， 方便用户退出，
131-
function rebalanceTwo(
132-
uint256 withdrawAmt_,
133-
address flashTkn_,
134-
uint256 flashAmt_,
135-
uint256 route_,
136-
uint256 totalAmountToSwap_,
137-
uint256 unitAmt_,
138-
bytes memory oneInchData_
139-
) external
140-
141-
1. validateFinalRatio()获取hf，安全则设置2%滑点，不安全5%
142-
2. getIdealBalances 获取vault和vaultDSA weth,steth空余余额,以及闲置总余额；
143-
3. 将空闲资金转入vaultDSA;
144-
4. 使用闪电贷，卖出steth，买入weth；偿还债务
145-
5. 检查validateFinalRatio
146-
147-
148-
149-
## instadapp lite v2 code analysis
150-
151-
v2 function description
152-
1. ERC-4626 Standard
153-
2. Multi-protocol Strategy
154-
3. Improved Withdrawals
155-
4. Rebalancers
156-
157-
The Rebalancer can carry out the following transactions on the vault:
158-
- deposit
159-
deposit assets from the vault into a protocol whenever the vault has excess deposit
160-
- withdraw
161-
withdraw assets from protocol back to vault; It can only happen as per the max ratios;
162-
- leverage
163-
leveraging the assets to earn greater yield as per the max ratio
164-
- Refinance
165-
move assets between protocols;
166-
When you deleverage the vault, the vault unwinds by selling stETH collateral to repay ETH debt. When issuing a deleverage there will be increased gas costs as the transaction uses a flashloan to unwind the vault and withdraw your deposit.
167-
168-
**for User**
169-
Deleveraging: If for any reason there is not enough liquidity in the withdraw pool or you want to withdraw more than is available, you still redeem your balance by forcing a deleverage to the vault.
170-
171-
172-
**iETH v2**
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0xA0D3707c569ff8C87FA923d3823eC5D81c98Be78
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Implement: https://etherscan.io/address/0x172455d14d1eb242e6f7f3b451529ab289095bb6#code
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## 相关竞品
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1. defisaver
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2. cian
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## Reference
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- Introducing Lite v2: https://blog.instadapp.io/introducing-lite-v2/

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