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Add ZMQ-PUB support for webhooks (#75)

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Lee *!* Clagett
2023-07-30 13:27:22 -04:00
committed by Lee *!* Clagett
parent d59fed6da2
commit 15e2be618a
11 changed files with 238 additions and 22 deletions
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34
docs/administration.md
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### webhook_add
This is used to track a specific payment ID to an address or all general
payments to an address (where payment ID is zero). Using this endpint requires
a web address for callback purposes, a primary (not integrated!) address, and
finally the type ("tx-confirmation"). The event will remain in the database
until one of the delete commands ([webhook_delete_uuid](#webhook_delete_uuid)
or [webhook_delete](#webhook_delete)) is used to remove it.
a web address or `zmq` for callback purposes, a primary (not integrated!)
address, and finally the type ("tx-confirmation"). The event will remain in the
database until one of the delete commands ([webhook_delete_uuid](#webhook_delete_uuid)
or [webhook_delete](#webhook_delete)) is used to remove it. All webhooks are
published over the ZMQ socket specified by `--zmq-pub` (when enabled/specified
on command line) in addition to any HTTP server specified in the callback.
> The provided URL will use SSL/TLS if `https://` is prefixed in the URL and
will use plaintext if `http://` is prefixed in the URL. SSL/TLS connections
will use the system certificate authority (root-CAs) by default, and will
ignore all authority checks if `--webhook-ssl-verification none` is provided
on the command line when starting `monero-lws-daemon`. The webhook will fail
if there is a mismatch of `http` and `https` between the two servers, and
will also fail if `https` verification is mismatched. The rule is: (1) if
the callback server has SSL/TLS disabled, the webhook should use `http://`,
(2) if the callback server has a self-signed certificate, `https://` and
`--webhook-ssl-verification none` should be used, and (3) if the callback
server is using "Let's Encrypt" (or similar), then `https://` with no
additional command line flag should be used.
will use plaintext if `http://` is prefixed in the URL. If `zmq` is provided
as the callback, notifications are performed _only_ over the ZMQ pub socket.
SSL/TLS connections will use the system certificate authority (root-CAs) by
default, and will ignore all authority checks if
`--webhook-ssl-verification none` is provided on the command line when
starting `monero-lws-daemon`. The webhook will fail if there is a mismatch of
`http` and `https` between the two servers, and will also fail if `https`
verification is mismatched. The rule is: (1) if the callback server has
SSL/TLS disabled, the webhook should use `http://`, (2) if the callback server
has a self-signed certificate, `https://` and `--webhook-ssl-verification none`
should be used, and (3) if the callback server is using "Let's Encrypt"
(or similar), then `https://` with no additional command line flag should be
used.
#### Initial Request to server

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docs/zmq.md Normal file
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# monero-lws ZeroMQ Usage
Monero-lws uses ZeroMQ-RPC to retrieve information from a Monero daemon,
ZeroMQ-SUB to get immediate notifications of blocks and transactions from a
Monero daemon, and ZeroMQ-PUB to notify external applications of payment_id
(web)hooks.
## External "pub" socket
The bind location of the ZMQ-PUB socket is specified with the `--zmq-pub`
option. Users are still required to "subscribe" to topics:
* `json-full-pyment_hook`: A JSON array of webhook payment events that have
recently triggered (identical output as webhook).
* `msgpack-full-payment_hook`: A msgpack array of webhook payment events that
have recently triggered (identical output as webhook).
### `json-full-payment_hook`/`msgpack-full-payment_hook`
These topics receive PUB messages when a webhook ([`webhook_add`](administration.md)),
event is triggered. If the specified URL is `zmq`, then notifications are only
done over the ZMQ-PUB socket, otherwise the notification is sent over ZMQ-PUB
socket AND the specified URL. Invoking `webhook_add` with a `payment_id` of
zeroes (the field is optional in `webhook_add), will match on all transactions
that lack a `payment_id`.
Example of the "raw" output from ZMQ-SUB side:
```json
json-full-payment_hook:{
"index": 2,
"event": {
"event": "tx-confirmation",
"payment_id": "4f695d197f2a3c54",
"token": "single zmq wallet",
"confirmations": 1,
"event_id": "3894f98f5dd54af5857e4f8a961a4e57",
"tx_info": {
"id": {
"high": 0,
"low": 5666768
},
"block": 2265961,
"index": 1,
"amount": 3117324236131,
"timestamp": 1687301600,
"tx_hash": "ef3187775584351cc5109de124b877bcc530fb3fdbf77895329dd447902cc566",
"tx_prefix_hash": "064884b8a8f903edcfebab830707ed44b633438b47c95a83320f4438b1b28626",
"tx_public": "54dce1a6eebafa2fdedcea5e373ef9de1c3d2737ae9f809e80958d1ba4590d74",
"rct_mask": "4cdc4c4e340aacb4741ba20f9b0b859242ecdad2fcc251f71d81123a47db3400",
"payment_id": "4f695d197f2a3c54",
"unlock_time": 0,
"mixin_count": 15,
"coinbase": false
}
}
}
```
Notice the `json-full-payment_hook:` prefix - this is required for the ZMQ PUB/SUB
subscription model. The subscriber requests data from a certain "topic" where
matching is done by string prefixes.
> `index` is a counter used to detect dropped messages.
> The `block` and `id` fields in the above example are NOT present when
`confirmations == 0`.