redeem

Burn an exact number of vault shares from owner and send the resulting USDC to receiver.

Signature

function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);

Parameters

Name	Type	Description
shares	uint256	Exact number of shares to burn (18 decimals).
receiver	address	Address that will receive the USDC.
owner	address	Address whose shares will be burned.

Returns

Name	Type	Description
assets	uint256	Amount of USDC sent to receiver, after the withdrawal fee.

Preconditions

• withdrawalsPaused() must be false.
• shares > 0 and <= balanceOf(owner).
• receiver and owner must be non-zero addresses.
• If owner != msg.sender, the caller needs allowance(owner, msg.sender) >= shares on the vault.

Events emitted

event Withdraw(address indexed sender, address indexed receiver, address indexed owner, uint256 assets, uint256 shares);
event Transfer(address indexed from, address indexed to, uint256 value); // share burn
event Approval(address indexed owner, address indexed spender, uint256 value); // only if allowance was used

Example — fully exit a position

import { erc20Abi } from 'viem'
import { publicClient, walletClient } from './client'
import { liteUsdVaultAbi } from './abi'
import { VAULT } from './constants'

const account = walletClient.account!

// Vault shares are an ERC-20 — read your balance with the standard ABI.
const balance = await publicClient.readContract({
  address: VAULT,
  abi: erc20Abi,
  functionName: 'balanceOf',
  args: [account.address],
})

const { request, result: usdcOut } = await publicClient.simulateContract({
  account,
  address: VAULT,
  abi: liteUsdVaultAbi,
  functionName: 'redeem',
  args: [balance, account.address, account.address],
})

console.log('Will receive', usdcOut, 'USDC (raw, 6 decimals)')

const hash = await walletClient.writeContract(request)
await publicClient.waitForTransactionReceipt({ hash })

The erc20Abi import comes from viem's bundled standard ABIs, so we don't need to extend the snippet.

When to use this vs withdraw

Use redeem when you want to exit a known share amount — most commonly a full or proportional exit. Use withdraw when you need a precise USDC amount out (e.g., paying back a fixed-USDC obligation).