stacker.news/components/webln/lnbits.js

import { bolt11Tags } from '@/lib/bolt11'

export const name = 'LNbits'

export const config = {
  provider: {
    url: {
      label: 'lnbits url',
      type: 'text'
    },
    adminKey: {
      label: 'admin key',
      type: 'password'
    }
  },
  card: {
    title: 'LNbits',
    badges: ['send only', 'non-custodialish'],
    href: '/settings/wallets/lnbits'
  }
}

export function getInfo ({ config, logger }) {
  return async function () {
    const response = await getWallet(config.url, config.adminKey)
    return {
      node: {
        alias: response.name,
        pubkey: ''
      },
      methods: [
        'getInfo',
        'getBalance',
        'sendPayment'
      ],
      version: '1.0',
      supports: ['lightning']
    }
  }
}

export function sendPayment ({ config, logger }) {
  return async function (bolt11) {
    const { url, adminKey } = config

    const hash = bolt11Tags(bolt11).payment_hash
    logger.info('sending payment:', `payment_hash=${hash}`)

    try {
      const response = await postPayment(url, adminKey, bolt11)

      const checkResponse = await getPayment(url, adminKey, response.payment_hash)
      if (!checkResponse.preimage) {
        throw new Error('No preimage')
      }

      const preimage = checkResponse.preimage
      logger.ok('payment successful:', `payment_hash=${hash}`, `preimage=${preimage}`)
      return { preimage }
    } catch (err) {
      logger.error('payment failed:', `payment_hash=${hash}`, err.message || err.toString?.())
      throw err
    }
  }
}

async function getWallet (baseUrl, adminKey) {
  const url = baseUrl.replace(/\/+$/, '')
  const path = '/api/v1/wallet'

  const headers = new Headers()
  headers.append('Accept', 'application/json')
  headers.append('Content-Type', 'application/json')
  headers.append('X-Api-Key', adminKey)

  const res = await fetch(url + path, { method: 'GET', headers })
  if (!res.ok) {
    const errBody = await res.json()
    throw new Error(errBody.detail)
  }

  const wallet = await res.json()
  return wallet
}

async function postPayment (baseUrl, adminKey, bolt11) {
  const url = baseUrl.replace(/\/+$/, '')
  const path = '/api/v1/payments'

  const headers = new Headers()
  headers.append('Accept', 'application/json')
  headers.append('Content-Type', 'application/json')
  headers.append('X-Api-Key', adminKey)

  const body = JSON.stringify({ bolt11, out: true })

  const res = await fetch(url + path, { method: 'POST', headers, body })
  if (!res.ok) {
    const errBody = await res.json()
    throw new Error(errBody.detail)
  }

  const payment = await res.json()
  return payment
}

async function getPayment (baseUrl, adminKey, paymentHash) {
  const url = baseUrl.replace(/\/+$/, '')
  const path = `/api/v1/payments/${paymentHash}`

  const headers = new Headers()
  headers.append('Accept', 'application/json')
  headers.append('Content-Type', 'application/json')
  headers.append('X-Api-Key', adminKey)

  const res = await fetch(url + path, { method: 'GET', headers })
  if (!res.ok) {
    const errBody = await res.json()
    throw new Error(errBody.detail)
  }

  const payment = await res.json()
  return payment
}