Tutorial: Implementing your first payment from WhatsApp

const r = $memory.getJson('checkout_response')
if (!r) throw new Error('checkout_response does not exist in memory.')

const pl = r?.paymentLinkResponse
if (!pl) throw new Error('checkout_response.paymentLinkResponse does not exist (check memory).')

const gw = pl.gateway_response || {}
const md = pl.metadata || gw.metadata || {}

const email = String(gw?.payer?.email || md.email || '')

$context.set('pay_operation_id', String(gw.id || ''))
$context.set('pay_amount', Number(pl.amount || 0))
$context.set('pay_currency', String(pl.currency || 'CLP'))
$context.set('pay_email', email)
$context.set('pay_status', String(gw.status || 'approved'))
$context.set(
  'pay_receipt',
  `Done ✅ Payment approved.\n\nMercado Pago operation #: ${String(gw.id || '')}`
)