feat(data-stream): simple connection test (#39)

* feat: introduce FuelCore trait

This trait describes the interface required for `fuel-core-nats` to extend `fuel-core`.
Equally, it will be useful for mocking fuel-core related components in our integration
tests.

* feat: add test for simple nats connections

* feat: introduce NatsConnection

Houses NATS connection streams, messages, and other connection details. This would
eventually expose custom functions for interacting with the NATS server on a need-to
-modularize basis.

* feat: further scope nats' connection testing

* fix: use nats configuration

* feat: test nkey authorization when connecting to nats

---------

Co-authored-by: Pedro Nauck <pedronauck@gmail.com>

.env.sample

@@ -4,4 +4,4 @@ RELAYER_V2_LISTENING_CONTRACTS=0x768f9459E3339A1F7d59CcF24C80Eb4A711a01FB
 RELAYER_DA_DEPLOY_HEIGHT=5791365
 RELAYER_LOG_PAGE_SIZE=2000
 SYNC_HEADER_BATCH_SIZE=100
-NATS_NKEY=generated-nats-secret
+NATS_NKEY=generated-nats-nkey-seed

Cargo.toml

@@ -18,6 +18,7 @@ version = "0.0.1"
 [workspace.dependencies]
 anyhow = "1.0"
 clap = { version = "4.5", features = ["derive"] }
+dotenvy = "0.15"
 futures = "0.3"
 tokio = { version = "1.38", features = ["full"] }
 fuel-core-bin = { version = "0.30", features = [
@@ -26,9 +27,9 @@ fuel-core-bin = { version = "0.30", features = [
     "relayer",
     "rocksdb",
 ] }
-fuel-core = { version = "0.30", features = ["p2p", "relayer", "rocksdb"] }
+fuel-core = { version = "0.30", features = ["p2p", "relayer", "rocksdb", "test-helpers"] }
 fuel-core-client = { version = "0.30" }
-fuel-core-types = { version = "0.30" }
+fuel-core-types = { version = "0.30", features = ["test-helpers"] }
 fuel-core-services = "0.30"
 
 [profile.release]

Makefile

@@ -37,11 +37,13 @@ stop:
 
 start.nats:	COMMANDS=docker
 start.nats: check-commands
-	docker run -p 4222:4222 -p 8222:8222 -p 6222:6222 --name fuel-core-nats-server -ti nats:latest --js
+	docker run -p 4222:4222 -p 8222:8222 -p 6222:6222 \
+	--mount type=bind,source="$$(pwd)"/crates/fuel-core-nats/nats.conf,target=/etc/nats/nats.conf \
+	--name fuel-core-nats-server \
+	-ti nats:latest --js --config /etc/nats/nats.conf
 
 stop.nats:
-	docker stop $$(docker ps -q --filter ancestor=nats:latest)
-	docker rm $$(docker ps -a -q --filter ancestor=nats:latest)
+	docker rm -f $$(docker ps -a -q --filter ancestor=nats:latest)
 
 # Starts fuel-core-nats service
 start.fuel-core-nats:

crates/fuel-core-nats/Cargo.toml

@@ -14,6 +14,7 @@ anyhow = "1.0.86"
 async-nats = "0.35.1"
 bytes = "1.6.0"
 clap = "4.5.4"
+dotenvy = { workspace = true }
 fuel-core = { workspace = true }
 fuel-core-bin = { workspace = true }
 fuel-core-client = { workspace = true }

crates/fuel-core-nats/nats.conf

@@ -1,6 +1,6 @@
 authorization: {
   users: [
-    { nkey: UDMBGUBEOCJVCOXHSQGYRX4SGS3QEAEDIVNHDBD63YEKHSGPVO53I2NU }
+    { nkey: UAWFS7BJM4WF3SEEGDX42EGTEC2VPLERMAUYFVUXIPIV664IANONDJR5 }
   ]
 }
 jetstream = {