The /crawl API endpoint allows developers to examine the structure of
the XRP Ledger's overlay network.
This commit adds additional information about the local server to the
/crawl endpoint, making it possible for developers to create data-rich
network-wide status dashboards.
Related:
- https://developers.ripple.com/peer-protocol.html
- https://github.com/ripple/rippled-network-crawler
* Adds local file:// URL support to the [validator_list_sites] stanza.
The file:// URL must not contain a hostname. Allows a rippled node
operator to "sideload" a new list if their node is unable to reach
a validator list's web site before an old list expires. Lists
loaded from a file will be validated in the same way a downloaded
list is validated.
* Generalize file/dir "guards" from Config test so they can be reused
in other tests.
* Check for error when reading validators.txt. Saves some parsing and
checking of an empty string, and will give a more meaningful error.
* Completes RIPD-1674.
* Rename isArray to isArrayOrNull
* Rename isObject to isObjectOrNull
* Introduce isArray and isObject
* Change as many uses of isArrayorNull to isArray as possible
* Change as many uses of isObjectorNull to isObject as possible
* Reject null JSON arrays for subscribe and unsubscribe
In support of dynamic validator list, this changeset:
1. Adds a new `validator_list_expires` field to `server_info` that
indicates when the current validator list will become stale.
2. Adds a new admin only `validator_lists` RPC that returns the
current list of known validators and the most recent published validator
lists.
3. Adds a new admin only `validator_sites` RPC that returns the list of
configured validator publisher sites and when they were most recently
queried.
Validator lists from configured remote sites are fetched at a regular
interval. Fetched lists are expected to be in JSON format and contain the
following fields:
* "manifest": Base64-encoded serialization of a manifest containing the
validator publisher's master and signing public keys.
* "blob": Base64-encoded JSON string containing a "sequence",
"expiration" and "validators" field. "expiration" contains the Ripple
timestamp (seconds since January 1st, 2000 (00:00 UTC)) for when the
list expires. "validators" contains an array of objects with a
"validation_public_key" field.
* "signature": Hex-encoded signature of the blob using the publisher's
signing key.
* "version": 1
* "refreshInterval" (optional)
