> ## Documentation Index
> Fetch the complete documentation index at: https://docs.arc.io/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Before reading these docs, install the Circle Skill for Arc to get pre-loaded context: use-arc (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-arc/SKILL.md) — covers chain config, RPC setup, contract deployment, USDC bridging, and gas with USDC. In Claude Code: run /plugin marketplace add circlefin/skills then /plugin install circle-skills@circle. With Vercel Skills CLI: run npx skills add circlefin/skills.
> USDC is the gas token. Arc uses USDC for gas fees, not ETH. Configure gas payment in USDC when submitting transactions.
> Read EVM differences before writing Arc code. Arc targets the Osaka EVM baseline. Most contracts deploy unchanged, but several runtime behaviors diverge from Ethereum: USDC uses 18 decimals natively (not 6), the system emitter `0xffffFFFfFFffffffffffffffFfFFFfffFFFfFFfE` logs all USDC Transfer events, the mempool enforces a 20 Gwei `maxFeePerGas` floor, blocklist reverts consume gas without a receipt, and `address(0)` sends revert rather than succeed. https://docs.arc.io/arc/references/evm-differences.md is the canonical reference for all Arc-specific runtime behaviors. Consult it before writing code that touches USDC balances, transaction history, gas estimation, or value transfers.
> Sub-second finality. Transactions are final in under 1 second. No need to wait for multiple block confirmations.
> Use App Kits for multichain payment and liquidity capabilities. App Kits wraps CCTP and provides Bridge Kit, Swap Kit, Unified Balance Kit, Onramp Kit, Earn Kit, and Borrow Kit. Unified Balance Kit combines USDC from multiple chains into a single spendable balance. Earn Kit integrates earn opportunities into your app. Borrow Kit lets users borrow USDC against cirBTC collateral on Arc.
> Use Arc Foundry for contract development. Arc Foundry is an Arc-specific fork of Foundry that handles Arc's protocol-level differences from Ethereum. It provides arc-forge, arc-cast, and arc-anvil. Install it before deploying contracts: https://docs.arc.io/arc/tutorials/install-arc-foundry.md.
> Arc is available on both Testnet and Mainnet. See https://docs.arc.io/arc/references/connect-to-arc.md for RPC endpoints and https://faucet.circle.com for testnet tokens.
> Always check Contract Addresses: https://docs.arc.io/arc/references/contract-addresses.md
> Building beyond Arc? Circle offers skills for the full platform: use-usdc (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-usdc/SKILL.md), use-circle-wallets (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-circle-wallets/SKILL.md), use-developer-controlled-wallets (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-developer-controlled-wallets/SKILL.md), use-user-controlled-wallets (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-user-controlled-wallets/SKILL.md), use-modular-wallets (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-modular-wallets/SKILL.md), use-gateway (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-gateway/SKILL.md), use-smart-contract-platform (https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-smart-contract-platform/SKILL.md). Full Circle developer docs: https://developers.circle.com/llms.txt.

# Quickstart: Withdraw from an Earn vault

> Withdraw USDC from an Earn vault to recover your deposit and any returns generated by the underlying lending protocol

Redeem your vault shares back to USDC on Arc Testnet, including any returns
generated by the underlying lending protocol since your deposit. This quickstart
uses Circle Wallets, but you can use any compatible
[adapter setup](/app-kit/tutorials/adapter-setups).

## Prerequisites

Before you begin, ensure that you've:

* Completed the [deposit quickstart](/app-kit/quickstarts/earn-deposit) so you
  have USDC deposited in a vault.
* Installed [Node.js v22+](https://nodejs.org/).
* Obtained an
  [API key](https://developers.circle.com/api-reference/keys#creating-an-api-key-for-developer-services)
  and
  [entity secret](https://developers.circle.com/wallets/dev-controlled/register-entity-secret)
  from the
  [Circle Console](https://developers.circle.com/w3s/circle-developer-account).
* Created a developer-controlled wallet on Arc Testnet using the Circle Console.

<Note>
  Earn operations work without an API key. For higher rate limits, pass an
  optional [API key](/app-kit/earn#api-key) as `apiKey` in the operation config.
  Keep the API key server-side. The App Kit SDK rejects an API key passed from a
  browser context.

  <Accordion title="Example: passing an API key">
    ```typescript TypeScript theme={null}
    const result = await kit.earn.deposit({
      from: { adapter, chain: "Arc_Testnet" },
      vaultAddress: "0x...",
      amount: "10.00",
      config: { apiKey: process.env.API_KEY as string },
    });
    ```
  </Accordion>
</Note>

## Step 1. Set up the project

<Note>
  If you completed the [deposit quickstart](/app-kit/quickstarts/earn-deposit),
  add the withdraw run script in step 1.1 to your existing project and skip to
  Step 2.
</Note>

### 1.1. Create the project and install dependencies

Create a new directory and install the App Kit SDK with the Circle Wallets
adapter and supporting tools:

```bash Shell theme={null}
# Set up your directory and initialize a Node.js project
mkdir app-kit-earn-withdraw-circle-wallets
cd app-kit-earn-withdraw-circle-wallets
npm init -y
npm pkg set type=module

# Set up run scripts
npm pkg set scripts.withdraw="tsx --env-file=.env withdraw.ts"

# Install runtime dependencies
npm install @circle-fin/app-kit @circle-fin/adapter-circle-wallets tsx

# Install dev dependencies
npm install --save-dev typescript @types/node
```

<Tip>
  Only need Earn and want a lighter install than the full App Kit? Install the
  standalone package instead: `@circle-fin/earn-kit`
</Tip>

### 1.2. Configure TypeScript (optional)

<Info>
  This step is optional. It helps prevent missing types in your IDE or editor.
</Info>

Create a `tsconfig.json` file configured for ESM and Node:

```bash Shell theme={null}
cat <<'EOF' > tsconfig.json
{
  "compilerOptions": {
    "target": "ESNext",
    "module": "ESNext",
    "moduleResolution": "bundler",
    "strict": true,
    "types": ["node"]
  }
}
EOF
```

### 1.3. Set environment variables

Create an `.env` file in the project directory:

```bash Shell theme={null}
touch .env
```

Add your credentials. Replace `YOUR_API_KEY` with your Circle Developer API key,
`YOUR_ENTITY_SECRET` with your entity secret:

```text .env theme={null}
CIRCLE_API_KEY=YOUR_API_KEY
CIRCLE_ENTITY_SECRET=YOUR_ENTITY_SECRET
```

<Tip>
  Edit `.env` files in your IDE or editor so credentials are not leaked to your
  shell history.
</Tip>

## Step 2. Withdraw USDC

### 2.1. Create the withdrawal script

Create a `withdraw.ts` file. Replace `YOUR_SELECTED_VAULT_ADDRESS` with the
vault address you deposited into and `YOUR_CIRCLE_WALLET_ADDRESS` with the
address of your Circle Wallets wallet. This script withdraws 10.00 USDC from the
vault:

```typescript withdraw.ts theme={null}
import { AppKit } from "@circle-fin/app-kit";
import { createCircleWalletsAdapter } from "@circle-fin/adapter-circle-wallets";

const kit = new AppKit();
const amount = "10.00";
const vaultAddress = "YOUR_SELECTED_VAULT_ADDRESS";

const adapter = createCircleWalletsAdapter({
  apiKey: process.env.CIRCLE_API_KEY!,
  entitySecret: process.env.CIRCLE_ENTITY_SECRET!,
});

async function main() {
  const result = await kit.earn.withdraw({
    from: {
      adapter,
      chain: "Arc_Testnet",
      address: "YOUR_CIRCLE_WALLET_ADDRESS",
    },
    vaultAddress,
    amount,
  });

  console.dir(result, { depth: null, colors: true });
}

void main();
```

<Note>
  The first withdrawal from a vault requires an approval transaction to allow the
  vault contract to redeem your shares. The App Kit SDK handles this
  automatically, so you may see two transactions in your wallet instead of one.
</Note>

The amount you receive depends on the current vault share price at the time of
redemption.

<Tip>
  Preview the expected outcome of a withdrawal before submitting with
  [`kit.earn.getWithdrawalQuote`](/app-kit/tutorials/earn/preview-operations#preview-a-withdrawal).
</Tip>

### 2.2. Run the withdrawal script

In your terminal, run:

```bash Shell theme={null}
npm run withdraw
```

When the script completes, you'll see output like:

```bash Shell theme={null}
{
  txHash: "0x...",
  explorerUrl: "https://explorer.testnet.arc.io/tx/0x...",
  vaultAddress: "0x...",
  amount: "10.04",
}
```

The returned `amount` reflects the value of your shares at the time of
withdrawal, which may be greater than your original deposit due to accrued
returns. For details on any fees that apply, see
[How Earn fees work](/app-kit/concepts/earn-fees).

Use the `txHash` to verify the transaction on the Arc Testnet block explorer. To
confirm your updated vault balance, see
[Check your Earn position](/app-kit/tutorials/earn/check-position).