docs: Improve RPC error message and docs reference

Signed-off-by: OjusWiZard <[email protected]>

autonomy/chain/utils.py

@@ -30,6 +30,7 @@
 from autonomy.chain.constants import SERVICE_MANAGER_TOKEN_COMPATIBLE_CHAINS
 from autonomy.chain.exceptions import DependencyError, FailedToRetrieveComponentMetadata
 from autonomy.chain.metadata import IPFS_URI_PREFIX
+from autonomy.constants import OLAS_DOCS_URL
 
 
 def get_ipfs_hash_from_uri(uri: str) -> str:
@@ -61,7 +62,11 @@ def resolve_component_id(
             token_id=token_id,
         )
     except RequestConnectionError as e:
-        raise FailedToRetrieveComponentMetadata("Error connecting to the RPC") from e
+        raise FailedToRetrieveComponentMetadata(
+            "Error connecting to the RPC. Please make sure that "
+            "you have set the chain RPC environment variable correctly. "
+            f"You can read more about the configurations on {OLAS_DOCS_URL}/open-autonomy/advanced_reference/commands/autonomy_service/#options."
+        ) from e
 
     try:
         return r_get(url=metadata_uri).json()

autonomy/constants.py

@@ -66,3 +66,4 @@
 DEFAULT_DOCKER_IMAGE_AUTHOR = "valory"
 OAR_IMAGE = "{image_author}/oar-{agent}:{version}"
 ABSTRACT_ROUND_ABCI_SKILL_WITH_HASH = "valory/abstract_round_abci:0.1.0:bafybeigax5gzud6ytq3wypajqwzlfwhpuegcma7q5b7m534kgu7vfmfaaq"
+OLAS_DOCS_URL = "https://docs.autonolas.network"