transferFrom

Standard ERC-20 transfer of vault shares from from to to, using the caller's allowance.

Signature

function transferFrom(address from, address to, uint256 value) external returns (bool);

Parameters

Name	Type	Description
from	address	Address whose shares are spent.
to	address	Recipient of the shares.
value	uint256	Amount of shares to move (18 decimals).

Returns

true on success. Reverts on failure.

Preconditions

• from and to must be non-zero addresses.
• from must hold at least value shares.
• The caller must have allowance(from, msg.sender) >= value. Set this with approve (called by from).

Events emitted

event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value); // updated allowance

Example — pull 5 shares using a prior allowance

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

const FROM = '0x...' as const
const TO   = '0x...' as const
const value = parseUnits('5', SHARE_DECIMALS)

const { request } = await publicClient.simulateContract({
  account: walletClient.account!,
  address: VAULT,
  abi: liteUsdVaultAbi,
  functionName: 'transferFrom',
  args: [FROM, TO, value],
})

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

Notes

• transferFrom is the underlying mechanism behind third-party withdraw / redeem calls — when owner != msg.sender, the vault internally consumes share allowance the same way.