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Webhooks

Get notified when a deployment changes state. Register an HTTPS endpoint for one of your stores and DIGHUb will POST a small JSON event each time a deploy moves through queued → building → ready (or error) — wire it to a Slack bot, a CI dashboard, or your own automation. Every event is signed so you can verify it came from DIGHUb.

Status — register now; delivery is rolling out

You can register, list, and remove webhooks today, and the event contract below (payload shape + signature) is stable and final, so you can build and test your receiver against it now. The DIGHUb-side delivery of live deploy events is being rolled out — until it's enabled for your store, a registered endpoint won't yet receive events. The contract won't change when it turns on.

The mental model​

A deploy is the act of publishing a new capsule — staged, then anchored on-chain. As it progresses, it passes through a few states. A webhook is your endpoint subscribing to those state changes for one store: when the deploy's state changes, DIGHUb sends a signed JSON POST to your URL. You verify the signature, then act on it.

You register a webhook per store, and only the store owner can manage its webhooks.

Events​

The event field is always deploy.<state>. There are four states:

EventMeaning
deploy.queuedA deploy has been accepted and queued. No content root exists yet.
deploy.buildingThe capsule is being compiled / staged.
deploy.readyThe deploy succeeded — the new root is anchored and the capsule is live. (terminal)
deploy.errorThe deploy failed. (terminal)

A successful deploy goes queued → building → ready; a failure goes … → error. ready and error are terminal — no further events follow for that deploy.

Payload​

The request body is a single JSON object (Content-Type: application/json):

{
  "event": "deploy.ready",
  "store_id": "<64-hex store id>",
  "root": "<64-hex content root>",
  "state": "ready",
  "confirmations": 3,
  "at": 1719700000
}
FieldTypeDescription
eventstringThe event name, deploy.<state> (e.g. deploy.ready).
store_idstringThe store the deploy belongs to (hex).
rootstring | nullThe new content root hash (hex). null for a queued event, before a root exists.
statestringThe deploy state: queued, building, ready, or error. Mirrors event.
confirmationsnumberOn-chain confirmation depth at the moment the event was emitted (0 while building).
atnumberEmit time, Unix seconds.

A (store_id, root) pair is a capsule — so a deploy.ready event identifies exactly which capsule went live, readable immediately over the dig RPC by its URN / chia:// address.

Register a webhook​

Webhooks are managed in DIGHUb, on the store you own:

  1. Open your store in DIGHUb and go to the Automation tab.
  2. In Deploy webhooks, add your endpoint URL. It must be https:// — deploy events carry your production root, so plain HTTP is rejected.
  3. DIGHUb shows the webhook's signing secret once. Copy it now — it's revealed a single time and is what you'll use to verify every event.

You can register more than one endpoint per store, list the ones you have, and remove any of them at any time from the same place.

Save the signing secret when it's shown

The secret is shown only on creation. DIGHUb does not store it in a way it can show you again, so if you lose it, delete the webhook and register a new one to get a fresh secret.

Verify each event​

Every delivery carries an HMAC signature so you can confirm it genuinely came from DIGHUb and the body wasn't altered. The header is:

X-Dig-Signature: sha256=<hex>

<hex> is the HMAC-SHA256 of the exact raw request body, keyed by your webhook's signing secret. To verify: compute the same HMAC over the bytes you received and compare (use a constant-time comparison).

Node.js:

import crypto from "node:crypto";

// `rawBody` is the exact bytes received (verify BEFORE JSON-parsing).
function verify(rawBody, signatureHeader, secret) {
  const expected =
    "sha256=" + crypto.createHmac("sha256", secret).update(rawBody).digest("hex");
  const a = Buffer.from(signatureHeader || "");
  const b = Buffer.from(expected);
  return a.length === b.length && crypto.timingSafeEqual(a, b);
}
Verify the raw bytes, then parse

Compute the HMAC over the exact body you received, before any JSON re-serialization — re-encoding can change bytes (key order, whitespace) and break the comparison. Reject any request whose signature doesn't match.

Delivery & retries​

  • Each event is delivered with a single POST to your endpoint. Respond with a 2xx status to acknowledge.
  • A non-2xx response (or a connection failure) is retried — up to 5 attempts with exponential backoff (the first retry is immediate, then growing delays capped at 5 minutes).
  • Make your receiver idempotent: a retried delivery repeats the same event, so key any side effects off (store_id, root, state) rather than assuming exactly-once delivery.
  • Endpoints must be reachable over public HTTPS with a valid certificate.

A typical use​

  • Notify a channel — deploy.ready → post the new capsule's address to Slack/Discord; deploy.error → page whoever's on call.
  • Drive a dashboard — track queued → building → ready/error per store to show deploy status.
  • Trigger follow-on work — on deploy.ready, kick a cache warm, a smoke test against the live chia:// address, or a downstream build.

If you publish from CI with the deploy Action, you already get a PR comment, a GitHub Deployment, and a commit status for each deploy — webhooks are for out-of-band consumers (a bot, a dashboard, another service) that aren't watching the PR.

Go deeper: the protocol​