feat: Query for single credential by id(hash)

packages/daf-data-store/src/data-store.ts

@@ -18,6 +18,28 @@ export class DataStore {
     return runMigrations(this.db)
   }
 
+  async findCredential(id: string) {
+    const query = sql
+      .select('rowid', '*')
+      .from('verifiable_credentials')
+      .where({ hash: id })
+      .toParams()
+
+    const rows = await this.db.rows(query.text, query.values)
+
+    const mapped = rows.map((row: any) => ({
+      rowId: `${row.rowid}`,
+      hash: row.hash,
+      iss: { did: row.iss },
+      sub: { did: row.sub },
+      jwt: row.jwt,
+      nbf: row.nbf,
+      iat: row.iat,
+    }))
+
+    return mapped[0]
+  }
+
   async findCredentials({ iss, sub }: { iss?: string; sub?: string }) {
     let where = {}
 

packages/daf-data-store/src/graphql.ts

@@ -88,6 +88,8 @@ export const resolvers = {
       const res = await dataStore.findCredentials({ iss, sub })
       return res
     },
+    credential: async (_: any, { id }: { id: string }, { dataStore }: Context) =>
+      dataStore.findCredential(id),
   },
   Mutation: {
     deleteMessage: async (_: any, { id }: { id: string }, { dataStore }: Context) =>
@@ -102,6 +104,7 @@ export const typeDefs = `
     messages(sender: ID, reveiver: ID, threadId: String, limit: Int): [Message]
     message(id: ID!): Message!
     credentials(iss: ID, sub: ID): [VerifiableClaim]
+    credential(id:ID!): VerifiableClaim!
   }
 
   extend type Mutation {