public static function loadSignatureSecretKey(string $filePath): SignatureSecretKey
    {
        if (!\is_readable($filePath)) {
            throw new CannotPerformOperation(
                'Cannot read keyfile: '. $filePath
            );
        }
        return new SignatureSecretKey(
            self::loadKeyFile($filePath)
        );
    }
public static function loadSignatureSecretKey(string $filePath): SignatureSecretKey
    {
        if (!\is_readable($filePath)) {
            throw new CannotPerformOperation(
                'Cannot read keyfile: '. $filePath
            );
        }
        return new SignatureSecretKey(
            self::loadKeyFile($filePath)
        );
    }
public static function loadSignatureSecretKey ( string $ filePath ) : SignatureSecretKey { if ( ! \ is_readable ( $ filePath ) ) { throw new CannotPerformOperation ( 'Cannot read keyfile: ' . $ filePath ) ; } return new SignatureSecretKey ( self :: loadKeyFile ( $ filePath ) ) ; }
Load, specifically, a signature secret key from a file

@param string $filePath
@return SignatureSecretKey

@throws CannotPerformOperation
@throws InvalidKey
@throws \TypeError
@codeCoverageIgnore
Load specifically a signature secret key from a file