docs: add jetstream desc and benthos example

2023-01-16 11:00:43 +00:00 · 2023-01-16 11:00:43 +00:00 · c138c95583
parent e1c9faa7d0
commit c138c95583
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--- a/docs/functionality.md
+++ b/docs/functionality.md
@ -25,6 +25,28 @@ Processes a transaction and passes it on to the next filter or terminates the pi

 - Fetches a block (and some of its header details), transactions and transaction receipts embedded within the transaction object in a single call.

+### NATS JetStream
+
+- The final filter will emit an event to JetStream.
+
+To view/debug the JetStream messages, you can use [Benthos](https://benthos.dev)
+
+With a config like:
+
+```yaml
+input:
+  label: jetstream
+  nats_jetstream:
+    urls:
+      - nats://127.0.0.1:4222
+    subject: "CHAIN.*"
+    durable: benthos
+    deliver: all
+output:
+  stdout:
+    codec: lines
+```
+
 ## Caveats

 - Blocks are not guaranteed to be processed in order, however a low concurrency setting would somewhat give an "in-order" behaviour (not to be relied upon in any case).