server/helpers/custom-jsonld-signature.ts

   1 import * as AsyncLRU from 'async-lru'
   2 import * as jsonld from 'jsonld'
   3 import * as jsig from 'jsonld-signatures'
   4
   5 jsig.use('jsonld', jsonld)
   6
   7 const nodeDocumentLoader = jsonld.documentLoaders.node()
   8
   9 const lru = new AsyncLRU({
  10   max: 10,
  11   load: (key, cb) => {
  12     nodeDocumentLoader(key, cb)
  13   }
  14 })
  15
  16 jsonld.documentLoader = (url, cb) => {
  17   lru.get(url, cb)
  18 }
  19
  20 export { jsig }