Close Position

You can directly close position through the close position method in the Cetus DLMM pool module.

When closing a position, if the position is not empty and still contains liquidity, fees, or rewards, an error code 0 will be thrown by the position module. To successfully close the position, follow these steps:

1. Remove liquidity(if existed).

2. Collect fees(if existed).

3. Collect rewards (if existed).

4. Close the position.

/// Closes a position and returns all underlying tokens and fees.
///
/// This function completely closes a position, removing all liquidity
/// and returning the underlying tokens plus accumulated fees.
///
/// ## Type Parameters
/// - `CoinTypeA`: First token type in the pool
/// - `CoinTypeB`: Second token type in the pool
///
/// ## Parameters
/// - `pool`: Mutable reference to the pool
/// - `position`: Position to close (consumed)
/// - `config`: Global configuration
/// - `versioned`: Versioned object for compatibility check
/// - `clk`: Clock for timestamp tracking
/// - `ctx`: Transaction context
///
/// ## Returns
/// - `(ClosePositionCert, Balance<CoinTypeA>, Balance<CoinTypeB>)`: Certificate and token balances
///
/// ## Events Emitted
/// - `ClosePositionEvent`: Contains position and closure details
///
/// ## Errors
/// - `EPositionPoolNotMatch`: If position doesn't belong to this pool
public fun close_position<CoinTypeA, CoinTypeB>(
    pool: &mut Pool<CoinTypeA, CoinTypeB>,
    position: Position,
    config: &GlobalConfig,
    versioned: &Versioned,
    clk: &Clock,
    ctx: &TxContext,
): (ClosePositionCert, Balance<CoinTypeA>, Balance<CoinTypeB>) {
    ...
}