# Integration Cookbook

This page provides walkthroughs for various integration scenarios to suit your needs.

1. [Parking Your Users' Idle Funds in Curvance](/app/developer-docs/quick-start-guides/integration-cookbook.md#parking-your-users-idle-funds-in-curvance)
2. [Include a Curvance Market in Your Vault](/app/developer-docs/quick-start-guides/integration-cookbook.md#include-a-curvance-market-in-your-vault)
3. More coming soon

{% hint style="danger" %}
To minimize the risk of bad debt and potential loss of funds, deposit user funds exclusively into conservative markets with low-risk profiles.
{% endhint %}

***

### 🅿️ Parking Your Users' Idle Funds in Curvance

**Objectives:**

* Safely park user idle funds in Curvance markets.

#### One time setup (per cToken market)

The user calls [`cUSDC.setDelegateApproval(<yourPlatformAddress>, true)`](/app/developer-docs/plugin-and-delegation-system/delegable-actions.md#setdelegateapproval), delegating your platform's address as the delegate.

**Optionally:** To reduce the total amount of transactions even further, from your app, call `approve` in the idle asset to allow the Curvance cToken to spend.

{% hint style="info" %}
Note: Users can mass-revoke all delegates anytime via the [approval index](/app/developer-docs/plugin-and-delegation-system/delegable-actions.md#incrementapprovalindex).
{% endhint %}

#### **Depositing idle funds**

**From your platform:** source USDC (e.g., transferred to you by the user) and call [`cUSDC.deposit(assets, <userAddress>)`](/app/developer-docs/lending-protocol/ctoken.md#deposit).

{% hint style="info" %}
Note: deposits pull USDC from the caller (msg.sender), not the `receiver`.
{% endhint %}

#### Retrieving funds on demand

Call [`cUSDC.redeemFor(shares, <yourPlatformAddress>, <userAddress>)`](/app/developer-docs/lending-protocol/ctoken.md#redeemfor) to redeem the user's cUSDC shares and receive USDC.

{% hint style="info" %}
Redeeming cTokens does not require ERC20 approval.
{% endhint %}

***

### 🧺 Include a Curvance Market in Your Vault

**Objectives:**

* Mint cTokens to your vault.
* Redeem cTokens to rebalance/withdraw

#### Mint cTokens when users mint vault shares

1. Approve cToken to spend the underlying ERC20 from your vault.&#x20;
2. Call [`cToken.deposit()`](/app/developer-docs/lending-protocol/ctoken.md#deposit) from your contract, with its address as the recipient.

#### Redeem cTokens to rebalance (if applicable) / or withdraw user funds

Call [`cToken.redeem()`](/app/developer-docs/lending-protocol/ctoken.md#redeem) if redeeming in shares, or [`cToken.withdraw()`](/app/developer-docs/lending-protocol/ctoken.md#withdraw) if redeeming in underlying.

{% hint style="info" %}
Redeeming cTokens does not require ERC20 approval.
{% endhint %}

***

#### Practical tips

* Use previews ([`previewDeposit()`, `previewWithdraw()`, `previewMint()`, `previewRedeem()`](/app/developer-docs/lending-protocol/ctoken.md#share-assets)) client-side for UX estimates.
* Pauses/caps may limit deposits/redemptions; handle errors gracefully.
* Security: delegation lets your platform act for users; encourage users to delegate only trusted contracts and remind them they can revoke instantly via approval index.


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