Send Lightning

lightning.payInvoiceSync(invoice: string)

Attempts to pay an invoice. Returns a Promise that resolves when the payment succeeds or fails / times out.

import { FedimintWallet } from '@fedimint/core-web'

const wallet = new FedimintWallet()
wallet.open()

const result = await wallet.lightning.payInvoiceSync( 
  'lnbc...', // bolt11 invoice
) 

if (result.success) {
  console.log(result.data.preimage) // preimage of the settled payment
  console.log(result.data.feeMsats) // fee paid in msats
}

lightning.payInvoice(invoice: string)

Attempts to pay a lightning invoice. Returns an OutgoingLightningPayment object containing details about the in-flight payment.

You can use subscribeLnPay to track the payment status. waitForPay returns a Promise that resolves when the payment succeeds or fails / times out.

import { FedimintWallet } from '@fedimint/core-web'
import type { LnPayState } from '@fedimint/core-web'

const wallet = new FedimintWallet()
wallet.open()

const { fee, payment_type } = await wallet.lightning.payInvoice( 
  'lnbc...', // bolt11 invoice
) 

// TODO: Simplify and explain this. 
// Users should not have to check if the operation_id exists.

let id = ''; 
if ('lightning' in payment_type) {
  id = payment_type.lightning // in flight lightning payment id
}

const unsubscribe = wallet.lightning.subscribeLnPay( 
  id, 
  (state: LnPayState) => console.log(state), // State of the payment
  (error: string) => console.error(error), 
)

// ...Cleanup Later
unsubscribe()

const result = await wallet.lightning.waitForPay(id) 

if (result.success) {
  console.log(result.data.preimage) // preimage of the settled payment
}