SDK will set withdrawAmount as empty for dex withdraw action as that field is only used for regular withdraw (T1,T3), not smart collateral withdraw (T2,T4).
Return Value
For smart collateral withdraw action, return value will represent burned shares
/// @param collAmount0 Amount of collateral 0 to withdraw.
/// @param collAmount1 Amount of collateral 1 to withdraw.
/// @param maxCollShares Max amount of collateral shares to burn. Can be empty for max withdrawal (see minCollToWithdraw)
/// @param minCollToWithdraw Minimum amount of collateral to withdraw in one token. Only used for max withdrawal, when:
/// 1. variableData.collAmount0 == type(uint256).max -> all collateral will be withdrawn in coll token0.
/// Any existing amount of token1 will be converted to token0 on fluid.
/// 2. variableData.collAmount1 == type(uint256).max -> all collateral will be withdrawn in coll token1.
/// Any existing amount of token0 will be converted to token1 on fluid.
struct WithdrawVariableData {
uint256 collAmount0;
uint256 collAmount1;
uint256 maxCollShares;
uint256 minCollToWithdraw;
}
/// @param vault The address of the Fluid DEX vault.
/// @param to Address to send the withdrawn assets to.
/// @param nftId The NFT ID of the position.
/// @param withdrawAmount Amount of collateral to withdraw. Used if vault is T3.
/// @param withdrawVariableData Variable data for withdraw action. Used if vault is T2 or T4.
/// @param wrapWithdrawnEth Whether to wrap the withdrawn ETH into WETH if one of the withdrawn assets is ETH.
struct Params {
address vault;
address to;
uint256 nftId;
uint256 withdrawAmount;
FluidDexModel.WithdrawVariableData withdrawVariableData;
bool wrapWithdrawnEth;
}