How the borrower debt tokens was burned without the borrower signature?

Question

If an liquidator is repaying the debt of the borrower at that time how the borrower debt tokens was burned without the borrower signature? As for I know if we try to perform the move/burn an token of the wallet the wallet authority needs to sign for that transaction right? Can you please explain if Im understand something wrong here. Thanks

Aaveator · Answer

Debt tokens are not like normal erc20 tokens. They dont have any approve or transfer methods. They are minted and burnt by the pool so when debt is cleared (either by borrower or liquidator), pool burns the tokens https://github.com/aave/aave-v3-core/blob/e46341caf815edc268893f4f9398035f242375d9/contracts/protocol/tokenization/VariableDebtToken.sol#L122

How the borrower debt token's was burned without the borrower signature?

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