StableMath

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Constants

_MIN_AMP

uint256 internal constant _MIN_AMP = 1;

_MAX_AMP

uint256 internal constant _MAX_AMP = 5000;

_AMP_PRECISION

uint256 internal constant _AMP_PRECISION = 1e3;

_MAX_STABLE_TOKENS

uint256 internal constant _MAX_STABLE_TOKENS = 5;

Functions

_calculateInvariant

function _calculateInvariant(
        uint256 amplificationParameter,
        uint256[] memory balances
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amplificationParameter	uint256
balances	uint256[]

Returns

Name	Type	Description
<none>	uint256

_calcOutGivenIn

function _calcOutGivenIn(
        uint256 amplificationParameter,
        uint256[] memory balances,
        uint256 tokenIndexIn,
        uint256 tokenIndexOut,
        uint256 tokenAmountIn,
        uint256 invariant
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amplificationParameter	uint256
balances	uint256[]
tokenIndexIn	uint256
tokenIndexOut	uint256
tokenAmountIn	uint256
invariant	uint256

Returns

Name	Type	Description
<none>	uint256

_calcInGivenOut

function _calcInGivenOut(
        uint256 amplificationParameter,
        uint256[] memory balances,
        uint256 tokenIndexIn,
        uint256 tokenIndexOut,
        uint256 tokenAmountOut,
        uint256 invariant
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amplificationParameter	uint256
balances	uint256[]
tokenIndexIn	uint256
tokenIndexOut	uint256
tokenAmountOut	uint256
invariant	uint256

Returns

Name	Type	Description
<none>	uint256

_calcBptOutGivenExactTokensIn

function _calcBptOutGivenExactTokensIn(
        uint256 amp,
        uint256[] memory balances,
        uint256[] memory amountsIn,
        uint256 bptTotalSupply,
        uint256 currentInvariant,
        uint256 swapFeePercentage
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amp	uint256
balances	uint256[]
amountsIn	uint256[]
bptTotalSupply	uint256
currentInvariant	uint256
swapFeePercentage	uint256

Returns

Name	Type	Description
<none>	uint256

_calcTokenInGivenExactBptOut

function _calcTokenInGivenExactBptOut(
        uint256 amp,
        uint256[] memory balances,
        uint256 tokenIndex,
        uint256 bptAmountOut,
        uint256 bptTotalSupply,
        uint256 currentInvariant,
        uint256 swapFeePercentage
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amp	uint256
balances	uint256[]
tokenIndex	uint256
bptAmountOut	uint256
bptTotalSupply	uint256
currentInvariant	uint256
swapFeePercentage	uint256

Returns

Name	Type	Description
<none>	uint256

_calcBptInGivenExactTokensOut

function _calcBptInGivenExactTokensOut(
        uint256 amp,
        uint256[] memory balances,
        uint256[] memory amountsOut,
        uint256 bptTotalSupply,
        uint256 currentInvariant,
        uint256 swapFeePercentage
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amp	uint256
balances	uint256[]
amountsOut	uint256[]
bptTotalSupply	uint256
currentInvariant	uint256
swapFeePercentage	uint256

Returns

Name	Type	Description
<none>	uint256

_calcTokenOutGivenExactBptIn

function _calcTokenOutGivenExactBptIn(
        uint256 amp,
        uint256[] memory balances,
        uint256 tokenIndex,
        uint256 bptAmountIn,
        uint256 bptTotalSupply,
        uint256 currentInvariant,
        uint256 swapFeePercentage
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amp	uint256
balances	uint256[]
tokenIndex	uint256
bptAmountIn	uint256
bptTotalSupply	uint256
currentInvariant	uint256
swapFeePercentage	uint256

Returns

Name	Type	Description
<none>	uint256

_getTokenBalanceGivenInvariantAndAllOtherBalances

function _getTokenBalanceGivenInvariantAndAllOtherBalances(
        uint256 amplificationParameter,
        uint256[] memory balances,
        uint256 invariant,
        uint256 tokenIndex
    ) internal pure returns (uint256);

Parameters

Name	Type	Description
amplificationParameter	uint256
balances	uint256[]
invariant	uint256
tokenIndex	uint256

Returns

Name	Type	Description
<none>	uint256