Create a new Retrieve Salt engine at src/engines/auth/salt/retrieve/index.js. In it, we need to use the Elasticsearch client's search method to find the user's document by email, extract the digest from the document, and then extract the salt from the digest:
const NO_RESULTS_ERROR_MESSAGE = 'no-results';function retrieveSalt(req, db, getSalt) { if (!req.query.email) { return Promise.reject(new Error('Email not specified')); } return db.search({ index: process.env.ELASTICSEARCH_INDEX, type: 'user', body: { query: { match: { email: req.query.email, }, }, }, _sourceInclude: 'digest', }).then((res) => { const user = res.hits.hits[0]; return user ? user._source.digest : Promise.reject(new Error(NO_RESULTS_ERROR_MESSAGE)); ...
