AAVE 合約開發

1.獲取 Kovan 測試幣：

Chainlink Faucets - Get Testnet Tokensfaucets.chain.link

2.架設 aave-ui

GitHub - aave/aave-ui: [DEPRECATED] An open source interface for the decentralized liquidity protocol AaveGitHub

3.架設好連線錢包，這邊記得選測試網路

選完後會執行前端的以下

4.執行 deposit

這時互動的合約地址如下：（如果是存 ETH 會指向 wETH 合約，其他的指向 LENDING_POOL 合約）

合約部署相關

以下合約設置其他 aave 合約的相關地址

https://github.com/aave/aave-protocol/blob/master/contracts/configuration/LendingPoolAddressesProvider.sol

User balance

https://github.com/aave/protocol-v2/blob/d5899dd524525e0fc31d74c12ebb497626f823b9/contracts/protocol/tokenization/AToken.sol#L208

protocol-v2/contracts/protocol/libraries/logic/ReserveLogic.sol at baeb455fad42d3160d571bd8d3a795948b72dd85 · aave/protocol-v2GitHub

https://github.com/aave/protocol-v2/blob/baeb455fad42d3160d571bd8d3a795948b72dd85/contracts/protocol/libraries/math/MathUtils.sol#L21

Reward 計算方式

每次借款與貸款的總數有變動時都會影響 APY，但實際計算要給地址多少獎勵時並不是乘以 APY，而是合約在每次池子兩邊數量變動的時候記錄當下時間與

觸發更新 reward

aave-stake-v2/contracts/stake/AaveIncentivesController.sol at aa4c9cbf4d05762ed33f2d6da2e955b2d27459cb · aave/aave-stake-v2GitHub

算法

aave-stake-v2/contracts/proposals/extend-stkaave-distribution/StakedTokenV2Rev3.sol at b9e40fb1c14df7e3874e4def53860d0f53c1d958 · aave/aave-stake-v2GitHub

https://github.com/aave/aave-stake-v2/blob/b9e40fb1c14df7e3874e4def53860d0f53c1d958/contracts/proposals/extend-stkaave-distribution/StakedTokenV2Rev3.sol#L1063

有關 liquidation

liquidation 的觸發可以是任何人，只要你有發現其他人帳戶的某個資產的 health factor < 1 即可觸發，所以通常會是有個機器人程式定期去掃描每個人的借貸資產的 health factor

https://docs.aave.com/developers/v/1.0/tutorials/liquidations

protocol-v2/contracts/adapters/FlashLiquidationAdapter.sol at baeb455fad42d3160d571bd8d3a795948b72dd85 · aave/protocol-v2GitHub

health factor < 1 執行 liquidation

protocol-v2/test-suites/test-amm/uniswapAdapters.flashLiquidation.spec.ts at baeb455fad42d3160d571bd8d3a795948b72dd85 · aave/protocol-v2GitHub

health factor 合約計算方式

protocol-v2/contracts/protocol/libraries/logic/GenericLogic.sol at baeb455fad42d3160d571bd8d3a795948b72dd85 · aave/protocol-v2GitHub

flashLoan 的 liquidate function call 順序

flashLoan -> executeOperation -> _liquidateAndSwap -> liquidationCall -> calculateHealthFactorFromBalances