Config flag upgrade (#5491)

* allowing different values other than strings

* updated readme

* ops

* better error msg

README.md

@@ -192,36 +192,36 @@ C:\ProgramData\chocolatey\lib\mingw\tools\install\mingw64\bin
 You can set Erigon flags through a YAML or TOML configuration file with the flag `--config`. The flags set in the configuration
 file can be overwritten by writing the flags directly on Erigon command line
 
-## Example
+### Example
 
 `./build/bin/erigon --config ./config.yaml --chain=goerli
 
 Assuming we have `chain : "mainnet" in our configuration file, by adding `--chain=goerli` allows the overwrite of the flag inside
 of the yaml configuration file and sets the chain to goerli
 
-## TOML 
+### TOML 
 
 Example of setting up TOML config file
 
 ```
 `datadir = 'your datadir'
-port = "1111"
+port = 1111
 chain = "mainnet"
-http = "true"
+http = true
 "private.api.addr"="localhost:9090"
 
 "http.api" = ["eth","debug","net"]
 ```
 
-## YAML 
+### YAML 
 
 Example of setting up a YAML config file
 
 ```
 datadir : 'your datadir'
-port : "1111"
+port : 1111
 chain : "mainnet"
-http : "true"
+http : true
 private.api.addr : "localhost:9090"
 
 http.api : ["eth","debug","net"]

cmd/erigon/main.go

@@ -101,16 +101,17 @@ func setFlagsFromConfigFile(ctx *cli.Context, filePath string) error {
 				sliceInterface := value.([]interface{})
 				s := make([]string, len(sliceInterface))
 				for i, v := range sliceInterface {
-					s[i] = v.(string)
+					s[i] = fmt.Sprintf("%v", v)
 				}
 				err := ctx.GlobalSet(key, strings.Join(s, ","))
 				if err != nil {
-					return err
+					return fmt.Errorf("failed setting %s flag with values=%s error=%s", key, s, err)
 				}
 			} else {
-				err := ctx.GlobalSet(key, value.(string))
+				err := ctx.GlobalSet(key, fmt.Sprintf("%v", value))
 				if err != nil {
-					return err
+					return fmt.Errorf("failed setting %s flag with value=%v error=%s", key, value, err)
+
 				}
 			}
 		}