add substreams tools default-endpoint

docs/release-notes/change-log.md

@@ -17,6 +17,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 * Fix handling of 'special case' substreams module with only "params" as its input: should not skip this execution (used in graph-node for head tracking) 
   -> empty files in module cache with hash `d3b1920483180cbcd2fd10abcabbee431146f4c8` should be deleted for consistency
 
+### CLI
+
+* Add `substreams tools default-endpoint {network-name}` to help with auto-configuration tools
+
 ## v1.10.2
 
 * `substreams gui`: fix panic in some conditions when streaming from block 0

tools/default-endpoint.go

@@ -0,0 +1,27 @@
+package tools
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/streamingfast/substreams/manifest"
+)
+
+var defaultEndpointCmd = &cobra.Command{
+	Use:   "default-endpoint {network-name}",
+	Short: "returns the default endpoint for a given network (the one used by default by the substreams CLI tool)",
+	Args:  cobra.ExactArgs(1),
+	RunE:  defaultEndpointE,
+}
+
+func init() {
+	Cmd.AddCommand(defaultEndpointCmd)
+}
+
+func defaultEndpointE(cmd *cobra.Command, args []string) error {
+	if endpoint := manifest.HardcodedEndpoints[args[0]]; endpoint != "" {
+		fmt.Println(endpoint)
+		return nil
+	}
+	return fmt.Errorf("no endpoint found for network %s", args[0])
+}