Как отправить картинку в base64 vk-io?

let icon = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAnUlEQVR42u3bMQ7AIAgAQP//afuE1hSw1CNhccFcIoPimHOOk3MAAADgLrNiVx0AAAC8A8hqSFF1AFQBZB+B1ToAAADYC5DVBKPWAVQBZB8BAAAA9AI4vgkCeLgxAAAAAAAAAAAAAAAAAAAAAAAAAAAAuBQF4GEEAAAA3QBMiJwKsBoAAADoDVA1LA3gawBRAQAAgB4Afo4CAPDfvABS2dwbcpzXlAAAAABJRU5ErkJggg==';
const iconBuffer = Buffer.from(icon.replace('data:image/png;base64,', ''), 'base64');
context.sendPhoto(iconBuffer, {message: `test`});