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184/// @dev Before fulfill redeem - transfer funds from fundsHolder to vault
185/// @dev "assets" will already be correct given the token user requested
186function beforeFulfillRedeem(address _asset, uint256 assets, uint256 shares) internal override {
187    IUltraVault mainVault_ = mainVault();
188    // Fulfill redeem in main vault. Returns asset units
189    mainVault_.fulfillRedeemOfAsset(_asset, shares, address(this));
190    uint256 mainAssetsClaimed = mainVault_.redeemAsset(_asset, shares, address(this), address(this));
191
192    // Deduct the expected withdrawal fee from the total amount of assets
193    uint256 expectedAssetsAfterFees = assets - mainVault_.calculateWithdrawalFee(assets);
194    require(mainAssetsClaimed == expectedAssetsAfterFees, AssetNumberMismatch());
195}
196
197/// @dev Internal fulfill redeem request logic
198function _fulfillRedeemOfAsset(
199    address _asset,
200    uint256 assets,
201    uint256 shares,
202    address controller
203) internal override returns (uint256) {
204    uint256 assetsFulfilled = super._fulfillRedeemOfAsset(_asset, assets, shares, controller);
205    // Deduct the expected withdrawal fee from the total amount of assets
206    uint256 withdrawalFee = mainVault().calculateWithdrawalFee(assetsFulfilled);
207    return assetsFulfilled - withdrawalFee;
208}
209
210/// @dev Hook for inheriting contracts after fulfill redeem
211/// @dev Correct claimable redeem amounts to account for underlying vault fees
212function afterFulfillRedeem(
213    address _asset,
214    uint256 assets,
215    uint256, // shares
216    address controller
217) internal override {
218    // The base implementation has added `_assets` to the claimable assets
219    // We need to calculate the withdrawal fee and deduct it from the claimable assets
220    uint256 withdrawalFee = mainVault().calculateWithdrawalFee(assets);
221    _consumeClaimableRedeem(controller, _asset, withdrawalFee, 0);
222}