---
sidebarTitle: "Feature: Script Shortcuts"
sidebarOrder: 6
---

# Script Shortcuts

Clash Premium implements the Scripting feature powered by Python3, enableing users to programmatically select policies for the packets with dynamic flexibility.

You can either controll the entire rule-matching engine with a single Python script, or define a number of shortcuts and use them in companion with the regular rules. This page refers to the latter feature, for the former, see [Script](./script.md).

This feature enables the use of script in `rules` mode. By default, DNS resolution takes place for SCRIPT rules. `no-resolve` can be appended to the rule to prevent the resolution. (i.e.: `SCRIPT,quic,DIRECT,no-resolve`)

**NOTE: ****`src_port`**** and ****`dst_port`**** are number**

```yaml
mode: Rule

script:
  shortcuts:
    quic: network == 'udp' and dst_port == 443
    curl: resolve_process_name() == 'curl'
    # curl: resolve_process_path() == '/usr/bin/curl'

rules:
  - SCRIPT,quic,REJECT
```

## Function Definitions

```ts
type resolve_ip = (host: string) => string // ip string
type in_cidr = (ip: string, cidr: string) => boolean // ip in cidr
type geoip = (ip: string) => string // country code
type match_provider = (name: string) => boolean // in rule provider
type resolve_process_name = () => string // find process name (curl .e.g)
type resolve_process_path = () => string // find process path (/usr/bin/curl .e.g)
```