Compound V2 markets
Operations → Lending → Compound V2 (Composer)
All Compound V2 markets behave the same way. The market is specified by the cToken parameter. Note that Compound V2 supports both native tokens (ETH) and ERC20 tokens.
Deposit
Deposit the underlying to the lender for the given cToken.
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 | cToken address |
Withdraw
Withdraw from the lender. Note that this requires that the caller approved the composer to spend cToken on their behalf.
If amount=0xffffffffffffffffffffffffffff, we read the user's full balance and withdraw without leaving dust.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 20 | cToken address |
Borrow
Borrow from the lender. The prerequisite is that the caller approved the composer contract to borrow on their behalf.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0 | 20 | underlying address |
| 20 | 16 | amount uint128 |
| 36 | 20 | receiver address |
| 76 | 20 | cToken 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 | cToken address |