1 files changed, 20 insertions, 0 deletions

diff --git a/server/helpers/custom-jsonld-signature.ts b/server/helpers/custom-jsonld-signature.ts
new file mode 100644
index 000000000..afb960618
--- /dev/null
+++ b/server/helpers/custom-jsonld-signature.ts
@@ -0,0 +1,20 @@
+import * as AsyncLRU from 'async-lru'
+import * as jsonld from 'jsonld'
+import * as jsig from 'jsonld-signatures'
+
+jsig.use('jsonld', jsonld)
+
+const nodeDocumentLoader = jsonld.documentLoaders.node()
+
+const lru = new AsyncLRU({
+  max: 10,
+  load: (key, cb) => {
+    nodeDocumentLoader(key, cb)
+  }
+})
+
+jsonld.documentLoader = (url, cb) => {
+  lru.get(url, cb)
+}
+
+export { jsig }