Compound V3 markets
All Compound V3 markets behave the same way. The market is specified by the comet parameter.
The markets are isolated from each other and only one currency is borrowable.
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 | comet address |
Withdraw
Withdraw for the lender. Note that this requires that the caller approved the composer to via comet.allow(...).
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 | 1 | isBase uint8 |
| 77 | 20 | comet address |
You need to provide the isBase flag if you want to withdraw the base asset. The reason for this is that Compound V3 has diffrerent ways to compute balances for the base asset.
Borrow
Borrow from the lender. The prequisite is that the caller approved the composer contract to borrow on their behalf via comet.allow(...).
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 20 | comet 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 | 20 | comet address |