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/// @notice ltSwap function with additional checks in place to ensure users don't lose funds by interacting
/// with TWAMM pools improperly. This function is only for long-term swappers < SwapType.LongTermSwap >
/// and will be more gas expensive due to the additional checks.
/// @param _amountIn the amount of tokenIn sold to the pool
/// @param _intervals number of intervals trade should be executed in
/// @param _poolType the pool type of the pair can be (Stable, Liquid, or Volatile). This affects the fee
/// tier and gas used to interact with the pool due to the OBI of executeVirtualOrders
/// @param _tokenIn the address of the token sold to the pool
/// @param _tokenOut the address of the token purchased from the pool
/// @param _to the address where the purchased tokens should be sent to
///
function longTermSwap(
uint256 _amountIn,
uint256 _intervals,
uint256 _poolType,
address _tokenIn,
address _tokenOut,
address _to
) external {
// balancer vault
address constant VAULT = 0xBA12222222228d8Ba445958a75a0704d566BF2C8;
// mainnet factory
address constant FACTORY = 0xD64c9CD98949C07F3C85730a37c13f4e78f35E77;
// get pool from factory
address pool = ICronV1PoolFactory(FACTORY).getPool(_tokenIn, _tokenOut, _poolType);
// setup information for long term swap
bytes memory userData = abi.encode(
ICronV1PoolEnums.SwapType.LongTermSwap, // swap type
_intervals
);
bytes32 poolId = ICronV1Pool(pool).POOL_ID();
(IERC20[] memory tokens, , ) = IVault(VAULT).getPoolTokens(poolId);
IAsset[] memory assets = _convertERC20sToAssets(tokens);
// approve tokens to spend from this contract in the vault
tokens[0].approve(VAULT, swapAmount);
// send long term order request to the pool via vault
IVault(VAULT).swap(
// ensure correct ordering of assets, matches tokenIn & tokenOut
// this assumes tokenIn == assets[0] and tokenOut == assets[1]
IVault.SingleSwap(poolId, IVault.SwapKind.GIVEN_IN, assets[0], assets[1], _amountIn, userData),
IVault.FundManagement(msg.sender, false, payable(_to), false),
0,
block.timestamp + 1000
);
}