fix: improve error message when URI missing (#2491)

.pre-commit-config.yaml

@@ -22,7 +22,7 @@ repos:
         additional_dependencies: [flake8-breakpoint, flake8-print, flake8-pydantic, flake8-type-checking]
 
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.13.0
+    rev: v1.14.1
     hooks:
     -   id: mypy
         additional_dependencies: [

setup.py

@@ -23,7 +23,7 @@
     ],
     "lint": [
         "black>=24.10.0,<25",  # Auto-formatter and linter
-        "mypy>=1.13.0,<2",  # Static type analyzer
+        "mypy>=1.14.1,<1.15.0",  # Static type analyzer
         "types-PyYAML",  # Needed due to mypy typeshed
         "types-requests",  # Needed due to mypy typeshed
         "types-setuptools",  # Needed due to mypy typeshed

src/ape_ethereum/provider.py

@@ -336,7 +336,9 @@ def uri(self) -> str:
         # NOTE: Don't use default IPC path here. IPC must be
         #   configured if it is the only RPC.
 
-        raise ProviderError("Missing URI.")
+        raise ProviderError(
+            f"Missing URI for network '{self.network.name}' on '{self.network.ecosystem.name}'."
+        )
 
     @property
     def network_choice(self) -> str:

tests/functional/geth/test_provider.py

@@ -1,6 +1,7 @@
 import re
+from abc import ABC
 from pathlib import Path
-from typing import cast
+from typing import Optional, cast
 
 import pytest
 from eth_pydantic_types import HashBytes32
@@ -12,6 +13,7 @@
 from web3.exceptions import ExtraDataLengthError
 from web3.providers import HTTPProvider
 
+from ape.api import NetworkAPI
 from ape.exceptions import (
     APINotImplementedError,
     BlockNotFoundError,
@@ -26,7 +28,7 @@
 from ape.utils import to_int
 from ape.utils._web3_compat import ExtraDataToPOAMiddleware
 from ape_ethereum.ecosystem import Block
-from ape_ethereum.provider import DEFAULT_SETTINGS, EthereumNodeProvider
+from ape_ethereum.provider import DEFAULT_SETTINGS, EthereumNodeProvider, Web3Provider
 from ape_ethereum.trace import TraceApproach
 from ape_ethereum.transactions import (
     AccessList,
@@ -143,6 +145,29 @@ def test_uri_invalid(geth_provider, project, ethereum):
         geth_provider.provider_settings = settings
 
 
+def test_uri_missing(mock_sepolia):
+    class MyProvider(Web3Provider, ABC):
+        network: NetworkAPI = mock_sepolia
+        name: str = "devnode"
+        _connected_uri = None
+        _configured_rpc = None
+
+        @property
+        def _default_http_uri(self) -> Optional[str]:
+            # Doing this to get the error to occur.
+            return None
+
+        def connect(self):
+            pass
+
+        def disconnect(self):
+            pass
+
+    provider = MyProvider()
+    with pytest.raises(ProviderError, match="Missing URI for network 'sepolia' on 'ethereum'."):
+        _ = provider.uri
+
+
 @geth_process_test
 def test_repr_connected(geth_provider):
     actual = repr(geth_provider)