Created
December 9, 2023 03:16
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regex: | |
"hideComments.regex": [ | |
{ | |
"regex": "^(\\s+|)\/\/.*\\n", | |
"flags": "igm", | |
}, | |
{ | |
"regex": "\/\\*(.|\\n)+?\\*\/", | |
"flags": "igm" | |
} | |
], | |
sample code | |
/*////////////////////////////////////////////////////////////// | |
AMM INTERACTION AND POSITION UPDATE HELPERS | |
//////////////////////////////////////////////////////////////*/ | |
/// @notice Helper that checks the proposed option position and size and forwards the minting and potential swapping tasks. | |
/// @notice This helper function checks: | |
/// @notice - that the `tokenId` is valid | |
/// @notice - confirms that the Uniswap pool exists | |
/// @notice - retrieves Uniswap pool info | |
/// @notice and then forwards the minting/burning/swapping to another internal helper functions which perform the AMM pool actions. | |
/// ┌───────────────────────┐ | |
/// │mintTokenizedPosition()├───┐ | |
/// └───────────────────────┘ │ | |
/// │ | |
/// ┌───────────────────────┐ │ ┌───────────────────────────────┐ | |
/// │burnTokenizedPosition()├───────► _validateAndForwardToAMM(...) ├─ (...) --> (mint/burn in AMM) | |
/// └───────────────────────┘ └───────────────────────────────┘ | |
/// @param tokenId the option position | |
/// @param positionSize the size of the position to create | |
/// @param tickLimitLow lower limits on potential slippage | |
/// @param tickLimitHigh upper limits on potential slippage | |
/// @param isBurn is equal to false for mints and true for burns | |
/// @return totalCollectedFromAMM the total amount of funds collected from Uniswap | |
/// @return totalMoved the total amount of funds swapped in Uniswap as part of building potential ITM positions | |
/// @return newTick the tick *after* the mint+swap | |
function _validateAndForwardToAMM( | |
uint256 tokenId, | |
uint128 positionSize, | |
int24 tickLimitLow, | |
int24 tickLimitHigh, | |
bool isBurn | |
) internal returns (int256 totalCollectedFromAMM, int256 totalMoved, int24 newTick) { | |
// Reverts if positionSize is 0 and user did not own the position before minting/burning | |
if (positionSize == 0) revert Errors.OptionsBalanceZero(); | |
/// @dev the flipToBurnToken() function flips the isLong bits | |
if (isBurn) { | |
tokenId = tokenId.flipToBurnToken(); | |
} | |
// Validate tokenId | |
// Extract univ3pool from the poolId map to Uniswap Pool | |
IUniswapV3Pool univ3pool = s_poolContext[tokenId.validate()].pool; | |
// Revert if the pool not been previously initialized | |
if (univ3pool == IUniswapV3Pool(address(0))) revert Errors.UniswapPoolNotInitialized(); | |
bool swapAtMint; | |
{ | |
if (tickLimitLow > tickLimitHigh) { | |
swapAtMint = true; | |
(tickLimitLow, tickLimitHigh) = (tickLimitHigh, tickLimitLow); | |
} | |
} | |
// initialize some variables returned by the _createPositionInAMM function | |
int256 itmAmounts; | |
{ | |
// calls a function that loops through each leg of tokenId and mints/burns liquidity in Uni v3 pool | |
(totalMoved, totalCollectedFromAMM, itmAmounts) = _createPositionInAMM( | |
univ3pool, | |
tokenId, | |
positionSize, | |
isBurn | |
); | |
} | |
// if the in-the-money amount is not zero (i.e. positions were minted ITM) and the user did provide tick limits LOW > HIGH, then swap necessary amounts | |
if ((itmAmounts != 0) && (swapAtMint)) { | |
totalMoved = swapInAMM(univ3pool, itmAmounts).add(totalMoved); | |
} | |
// Get the current tick of the Uniswap pool, check slippage | |
(, newTick, , , , , ) = univ3pool.slot0(); | |
if ((newTick >= tickLimitHigh) || (newTick <= tickLimitLow)) revert Errors.PriceBoundFail(); | |
return (totalCollectedFromAMM, totalMoved, newTick); | |
} |
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