BPTLens

a contract to read manipulation resistant balances from BPTs

Functions

constructor

function constructor(
    address _token,
    contract IWeightedPool _pool,
    contract IOracle _reportedOracle,
    contract IOracle _otherOracle,
    bool _feiIsReportedIn,
    bool _feiIsOther
) public

Parameters

Name	Type	Description
_token	address
_pool	contract IWeightedPool
_reportedOracle	contract IOracle
_otherOracle	contract IOracle
_feiIsReportedIn	bool
_feiIsOther	bool

balance

function balance() public returns (uint256)

gets the effective balance of "balanceReportedIn" token if the deposit were fully withdrawn

resistantBalanceAndFei

function resistantBalanceAndFei() public returns (uint256, uint256)

Calculates the manipulation resistant balances of Balancer pool tokens using the logic described here: https://docs.gyro.finance/learn/oracles/bpt-oracle This is robust to price manipulations within the Balancer pool.

_getIdealReserves

function _getIdealReserves(
    uint256[] balances,
    uint256[] prices,
    uint256[] weights,
    uint256 i
) internal returns (uint256 reserves)

Parameters

Name	Type	Description
balances	uint256[]
prices	uint256[]
weights	uint256[]
i	uint256