Enter BOLT11 Invoice

Code Snippet

import {Identifier, Lsat} from 'lsat-js'
// can use any macaroon utility as long it follows lib-macaroon standard
import { MacaroonsBuilder } from 'macaroons.js'

const identifier = new Identifier({
  paymentHash: Buffer.from(paymentHash, 'hex'),
})
const builder = new MacaroonsBuilder(
  window.location.origin,
  signingKey,
  identifier.toString()
)
const lsat = Lsat.fromMacaroon(macaroon.serialize(), payreq)
lsat.toJSON()

Enter WWW-Authenticate LSAT Challenge

Code Snippet

import {Lsat} from 'lsat-js'

// challenge must be a base64 encodedstring
const lsat = Lsat.fromChallenge(challenge)

// Lsat.fromHeader(header) accomplishes the same thing
// for a challenge with the "LSAT" prefix, which describes
// the _type_ of challenge WWW-Authenticate challenge
lsat.toJSON()

Enter Token

Code Snippet

import {Lsat} from 'lsat-js'

// challenge must be a base64 encodedstring
const lsat = Lsat.fromToken(token)

lsat.toJSON()

Enter LSAT Token & Preimage

Code Snippet

import {Lsat} from 'lsat-js'

const lsat = Lsat.fromToken(token)
// throws if the preimage is malformed or does not match
lsat.setPreimage(secret)
lsat.toJSON()

Enter LSAT and Expiration to Set

Code Snippet

import {Lsat, Caveat} from 'lsat-js'

const lsat = Lsat.fromToken(token)

Enter LSAT & Secret

Code Snippet

import {
  Lsat, 
  expirationSatisfier, 
  verifyFirstPartyMacaroon
} from 'lsat-js'

const lsat = Lsat.fromToken(token)

// check if is expired based on (optional) expiration caveat
lsat.isExpired() 

// checks LSAT preimage
lsat.isSatisfied()

// checks caveats are satisfied and macaroon signature is valid
verifyFirstPartyMacaroon(
  lsat.baseMacaroon,
  signingKey,
  // must pass all satisfiers necessary for validation
  expirationSatisfier
)

lsat.toJSON()