OptionRegistry.sol
This contract is responsible for handling all functionality pertaining to interaction with the opyn option protocol, storing the information about options series and conducting collateral management logic of partially collateralised vaults. The pool uses partial collateralisation which means that options contracts can be undercollateralised this means much better capital efficiency but also introduces margin risk, this is managed by holding a margin buffer in the LiquidityPool that can be used for managing collateral. For documentation on opyns partial liquidation system see: https://medium.com/opyn/partially-collateralized-options-now-in-defi-b9d223eb3f4d opyn-rysk gamma protocol This contract essentially gets infinite approval rights from the LiquidityPool.
Contract used for conducting options issuance and settlement as well as collateral management
Interacts with the opyn-rysk gamma protocol via OpynInteractions for options activity. Interacts with the liquidity pool for collateral and instructions.
The library does not directly use oracles, the opyn-rysk gamma protocol uses chainlink oracles for options pricing.
This function creates an oToken series via OpynInteractions and stores the identity of this oToken in the option registry without minting a short position. The strike is passed in as e18 decimals and converted with
formatStrikePrice() in order to make it compatible with opyn's e18 decimals. It is stored with opyn's decimals. This function is called via the LiquidityPool only.This function mints a short position for an oToken that has been "issued" by the option registry. If it has not been issued then it will not be minted. This contract will retrieve the seriesInfo from the registry, then will retrieve the opyn-rysk vault id for this series if it exists. If it does not exist then a new vault id will be created. A short is created via OpynInteractions to the options registry which is then transferred to the LiquidityPool. This function is called via the LiquidityPool only.
This function closes a short position that was "issued" by the option registry and a vault already exists (it does not have to be opened by the option registry, but an option of this series has to have been minted at some point). It closes the oToken via OpynInteractions after transferring the oToken from the liquidity pool to the registry. After the close it will return any redeemed collateral to the liquidity pool. It makes sure the oToken can be closed (i.e. if it hasnt already expired).
This function interacts with Gamma protocol to "redeem" any oToken. This means that it burns the oToken and returns the option value to the sender after it has expired.
This function settles a vault that the registry owns. It can only occur after expiry. All funds are sent back to the liquidityPool. This function can only be called via the liquidity pool which can only be called by a trusted party.
This function checks the vault health by calling checkVaultHealth. If the vault is undercollateralised then the function calls adjustCollateral in the liquidity pool to request collateral extraction approval, This collateral is then transferred into the OptionRegistry from the LiquidityPool and deposited into the vault via OpynInteractions depositCollat. If the vault is above its upper collateral factor then it is over collateralised so funds are withdrawn from the vault and transferred to the liquidityPool, this is reflected in the liquidityPool again.
This function allows a trusted caller to collateralise a vault if it is undercollateralised using their own funds. This is done in emergency scenarios where the liquidity pool has insufficient funds to cover collateralisation.
If a vault gets liquidated all collateral will have been lost. This function exists just in case there is some dust collateral left in a vault after a liquidation occurs. It adjusts the collateralAllocated in the liquidityPool.
This function is used to tell that LiquidityPool that a liquidation of a vault controlled by the optionRegistry has happened. It checks the vaultLiquidationDetails, if there is a liquidation it will reflect this in the liquidityPool via collateralAllocated. It will then clear these liquidation details so that liquidations dont get double counted accidentally.
This function sets the liquidity pool that is used for collateral transfer, oToken transfers and liquidity pool accessable functionality.
This function sets the upper and lower health factors for partially collateralised put and call vaults. If below the thresholds then the vault will need more collateral, if above you can remove collateral if between then leave the collateral as is.
This functon gets the required collateral for the option series passed in and an amount. It then multiplies this by the upper health factor to get the safe amount of collateral to maintain the margin balance.
This function returns an oToken from the opyn-rysk gamma otoken factory. If the otoken does not exist then it returns the zero address. The strike is passed in in oToken (e8) decimals.
This function checks the margin health of a specific vault and returns whether the vault is under or over collateralised and if so how much it is over/under by. Since all vaults use Opyn's partial collateralisation mechanism it means that they require collateral/margin management. The function starts by retrieving the vault from the opyn controller. Then searching for that series in the registry. Then the required collateral for that vault is retrieved from opyn's margin calculator and the collateral in the vault is retrieved. The health factor is calculated as
(collatAmount * MAX_BPS) / marginReq. This health factor is then compared to the desired health factor. If it is above the healthFactor is above upperHealthFactor then the registry tells the caller that the vault is overcollateralised and the amount that should be withdrawn, If the opposite is true then the registry tells the caller that the vault is undercollateralised and the amount that should be deposited to return to the upperHealthFactor.This function gets a series address that has been issued by the registry using an issuance hash
This function takes in an address then searches the seriesInfo[] mapping in the contract to retrieve the OptionSeries struct for that series address.
This function takes in an address then searches the seriesInfo[] mapping in the contract to retrieve the OptionSeries struct for that series address, these will match opyn's records.
This function gets the issuance hash of the input value which should be an OptionSeries struct. This hash is used for series storage.
This function gets the issuance hash of the input values. This hash is used for series storage
This function converts an e18 strike price to e8 strike price, making sure to round down to deal with any rounding issue on the gamma protocol side of things.
address oTokenFactory
immutable variables ///
address gammaController
address collateralAsset
contract AddressBookInterface addressBook
address marginPool
mapping(address => struct Types.OptionSeries) seriesInfo
dynamic variables ///
mapping(address => uint256) vaultIds
mapping(bytes32 => address) seriesAddress
uint64 vaultCount
address liquidityPool
governance settable variables ///
uint64 callUpperHealthFactor
uint64 callLowerHealthFactor
uint64 putUpperHealthFactor
uint64 putLowerHealthFactor
mapping(address => bool) keeper
uint256 MAX_BPS
constant variables ///
uint256 SCALE_FROM
uint8 OPYN_DECIMALS
event OptionTokenCreated(address token)
events && errors && modifiers ///
event SeriesRedeemed(address series, uint256 underlyingAmount, uint256 strikeAmount)
event OptionsContractOpened(address series, uint256 vaultId, uint256 optionsAmount)
event OptionsContractClosed(address series, uint256 vaultId, uint256 closedAmount)
event OptionsContractSettled(address series, uint256 collateralReturned, uint256 collateralLost, uint256 amountLost)
event VaultLiquidationRegistered(address series, uint256 vaultId, uint256 amountLiquidated, uint256 collateralLiquidated)
error NoVault()
error NotKeeper()
error NotExpired()
error HealthyVault()
error AlreadyExpired()
error NotLiquidityPool()
error NonExistentSeries()
error InvalidCollateral()
error VaultNotLiquidated()
error InsufficientBalance()
constructor(address _collateralAsset, address _oTokenFactory, address _gammaController, address _marginPool, address _liquidityPool, address _addressBook, address _authority) public
function setLiquidityPool(address _newLiquidityPool) external
Set the liquidity pool address
Name | Type | Description |
|---|---|---|
_newLiquidityPool | address | set the liquidityPool address |
function setKeeper(address _target, bool _auth) external
Set or revoke a keeper
Name | Type | Description |
|---|---|---|
_target | address | address to become a keeper |
_auth | bool | accept or revoke |
function setHealthThresholds(uint64 _putLower, uint64 _putUpper, uint64 _callLower, uint64 _callUpper) external
Set the health thresholds of the pool
Name | Type | Description |
|---|---|---|
_putLower | uint64 | the lower health threshold for puts |
_putUpper | uint64 | the upper health threshold for puts |
_callLower | uint64 | the lower health threshold for calls |
_callUpper | uint64 | the upper health threshold for calls |
function issue(struct Types.OptionSeries optionSeries) external returns (address)
Either retrieves the option token if it already exists, or deploy it
Name | Type | Description |
|---|---|---|
optionSeries | struct Types.OptionSeries | the series used for the mint - strike passed in as e18 |
Name | Type | Description |
|---|---|---|
[0] | address | the address of the option |
function open(address _series, uint256 amount, uint256 collateralAmount) external returns (bool, uint256)
Open an options contract using collateral from the liquidity pool
only callable by the liquidityPool
Name | Type | Description |
|---|---|---|
_series | address | the address of the option token to be created |
amount | uint256 | the amount of options to deploy - assume in e18 |
collateralAmount | uint256 | the collateral required for the option - assumes in collateral decimals |
Name | Type | Description |
|---|---|---|
[0] | bool | if the transaction succeeded |
[1] | uint256 | the amount of collateral taken from the liquidityPool |
function close(address _series, uint256 amount) external returns (bool, uint256)
Close an options contract (oToken) before it has expired
only callable by the liquidityPool
Name | Type | Description |
|---|---|---|
_series | address | the address of the option token to be burnt |
amount | uint256 | the amount of options to burn - assumes in e18 |
Name | Type | Description |
|---|---|---|
[0] | bool | if the transaction succeeded |
[1] | uint256 | |
function settle(address _series) external returns (bool, uint256, uint256, uint256)
Settle an options vault
callable by the liquidityPool so that local variables can also be updated
Name | Type | Description |
|---|---|---|
_series | address | the address of the option token to be burnt |
Name | Type | Description |
|---|---|---|
[0] | bool | if the transaction succeeded |
[1] | uint256 | the amount of collateral returned from the vault |
[2] | uint256 | the amount of collateral used to pay ITM options on vault settle |
[3] | uint256 | number of oTokens that the vault was short |
function adjustCollateral(uint256 vaultId) external
adjust the collateral held in a specific vault because of health
Name | Type | Description |
|---|---|---|
vaultId | uint256 | the id of the vault to check |
function adjustCollateralCaller(uint256 vaultId) external
adjust the collateral held in a specific vault because of health, using collateral from the caller. Only takes from msg.sender, doesnt give them if vault is above the max.
this is a safety function, if worst comes to worse any caller can collateralise a vault to save it.
Name | Type | Description |
|---|---|---|
vaultId | uint256 | the id of the vault to check |
function wCollatLiquidatedVault(uint256 vaultId) external
withdraw collateral from a fully liquidated vault
this is a safety function, if a vault is liquidated.
Name | Type | Description |
|---|---|---|
vaultId | uint256 | the id of the vault to check |
function registerLiquidatedVault(uint256 vaultId) external
register a liquidated vault so the collateral allocated is managed
this is a safety function, if a vault is liquidated to update the collateral assets in the pool
Name | Type | Description |
|---|---|---|
vaultId | uint256 | the id of the vault to register liquidation for |
function redeem(address _series) external returns (uint256)
Redeem oTokens for the locked collateral
Name | Type | Description |
|---|---|---|
_series | address | the address of the option token to be burnt and redeemed |
Name | Type | Description |
|---|---|---|
[0] | uint256 | amount returned |
function getCollateral(struct Types.OptionSeries series, uint256 amount) external view returns (uint256)
Send collateral funds for an option to be minted
series.strike should be scaled by 1e8.
Name | Type | Description |
|---|---|---|
series | struct Types.OptionSeries | details of the option series |
amount | uint256 | amount of options to mint always in e18 |
Name | Type | Description |
|---|---|---|
[0] | uint256 | amount transferred |
function getOtoken(address underlying, address strikeAsset, uint256 expiration, bool isPut, uint256 strike, address collateral) external view returns (address)
Retrieves the option token if it exists
Name | Type | Description |
|---|---|---|
underlying | address | is the address of the underlying asset of the option |
strikeAsset | address | is the address of the collateral asset of the option |
expiration | uint256 | is the expiry timestamp of the option |
isPut | bool | the type of option |
strike | uint256 | is the strike price of the option - 1e18 format |
collateral | address | is the address of the asset to collateralize the option with |
Name | Type | Description |
|---|---|---|
[0] | address | the address of the option |
function checkVaultHealth(uint256 vaultId) public view returns (bool isBelowMin, bool isAboveMax, uint256 healthFactor, uint256 upperHealthFactor, uint256 collatRequired, address collatAsset)
check the health of a specific vault to see if it requires collateral
Name | Type | Description |
|---|---|---|
vaultId | uint256 | the id of the vault to check |
Name | Type | Description |
|---|---|---|
isBelowMin | bool | bool to determine whether the vault needs topping up |
isAboveMax | bool | bool to determine whether the vault is too overcollateralised |
healthFactor | uint256 | the health factor of the vault in MAX_BPS format |
upperHealthFactor | uint256 | the upper bound of the acceptable health facor range in MAX_BPS format |
collatRequired | uint256 | the amount of collateral required to return the vault back to normal |
collatAsset | address | the address of the collateral asset |
function getSeriesAddress(bytes32 issuanceHash) external view returns (address)
non-complex getters ///
function getSeries(struct Types.OptionSeries _series) external view returns (address)
function getSeriesInfo(address series) external view returns (struct Types.OptionSeries)
function getIssuanceHash(struct Types.OptionSeries _series) public pure returns (bytes32)
function getIssuanceHash(address underlying, address strikeAsset, address collateral, uint256 expiration, bool isPut, uint256 strike) internal pure returns (bytes32)
Helper function for computing the hash of a given issuance.
function formatStrikePrice(uint256 strikePrice, address collateral) public view returns (uint256)
Converts strike price to 1e8 format and floors least significant digits if needed
Name | Type | Description |
|---|---|---|
strikePrice | uint256 | strikePrice in 1e18 format |
collateral | address | address of collateral asset |
Name | Type | Description |
|---|---|---|
[0] | uint256 | if the transaction succeeded |
function _isLiquidityPool() internal view
function _isKeeper() internal view
keepers, managers or governors can access
Last modified 1yr ago