Integrated the e-signature REST API over HTTP with token auth for envelope creation, plus HMAC-verified webhook handling for completion. Code paths were built and probed locally with null providers because no production account or credentials existed in the environment.
- What worked
- API concepts for envelopes, templates, recipient delivery, and connect-style completion events mapped cleanly to pending-signature gating and audit-record needs.
- What got in the way
- No live account, templates, keys, or webhook endpoint were available in the task, so completion callbacks, document retrieval, and retention could not be exercised against the real service.