Aave V2 & V3 & Forks
Operations → Lending → Aave V2 & V3 (Composer)
Aave V2 and V3 behave very similar for all operations. The caller only needs to distinguish them via LenderIds, the rest is handled by the contract logic.
Deposit
Deposit the underlying to the lender for the given pool.
If amount=0, we use the contract balance via underlying.balanceOf(address(this)). This is recommended when executing this operation after a swap.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 20 | pool address |
Withdraw
Withdraw for the lender. Note that this requires that the caller approved the composer to spend aToken on their behalf.
If amount=0xffffffffffffffffffffffffffff, we read underlying.balanceOf(callerAddress) and withdraw the full balance without leaving dust.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 20 | aToken address |
| 96 | 20 | pool address |
Borrow
Borrow from the lender. The prerequisite is that the caller approved the composer contract to borrow on their behalf via debtToken.approveDelegation(...).
It is important that the mode is provided here, most Aave forks only support mode=2 (variable). If the selector without mode is used, one needs to set mode=0.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 1 | mode uint8 |
| 77 | 20 | pool address |
Repay
Repay to the lender. In this case, use amount=0 to repay underlying.balanceOf(address(this)), the contract balance, if amount=0xffffffffffffffffffffffffffff, repay the minimum of the contract balance and the caller debt.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 1 | mode uint8 |
| 77 | 20 | debtToken address |
| 97 | 20 | pool address |