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### tl, dr
* lending protocol (e.g. aave or maker) liquidations present a well-known MEV opportunity. they work by requiring users to deposit some collateral. users can then borrow different assets and tokens from others depending on what they need, up to a certain amount of their deposited collateral.
* as the value of a borrower's collateral fluctuates, if the value of the borrowed assets exceeds the value of the collateral, the protcol allows anyone to liquidate the collateral (similar to margin calls in traditional finance).
* searchers compete to parse blockchain data as fast as possible to determine which borrowers can be liquidated and be the first to submit a liquidation transaction and collect the liquidation fee.
* example of strategy: bot detects a liquidation opportuniy at a block and issues a liquidation tx, which is expected to be include in the next block. to compete with other liquidators, the bot sets high tx fees for their liquidation tx.
* another strategy: bot observes a tx which will create a liquidation opportunity (e.g., an oracle price update tx rendering a collaterized debit to be liquidated), then backruns this tx with a liquidation tx to avoid the fee bidding competition.
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* lending protocol work by requiring users to deposit some collateral. users can then borrow different assets and tokens from others depending on what they need, up to a certain amount of their deposited collateral. as the value of a borrower's collateral fluctuates, if the value of the borrowed assets exceeds the value of the collateral, the protocol allows anyone to liquidate the collateral (similar to margin calls in traditional finance).
* searchers compete to parse blockchain data as fast as possible to determine which borrowers can be liquidated and be the first to submit a liquidation transaction and collect the liquidation fee.
* example of strategy: bot detects a liquidation opportunity at a block and issues a liquidation tx, which is expected to be included in the next block. to compete with other liquidators, the bot sets high tx fees for their liquidation tx.
* another strategy: bot observes a tx that will create a liquidation opportunity (e.g., an oracle price update tx rendering a collateralized debit to be liquidated), then backruns this tx with a liquidation tx to avoid the fee bidding competition.
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### in this dir
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* [aave](aave.md)
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