parse/
parse.rs

1// Miniscript
2// Written in 2019 by
3//     Andrew Poelstra <apoelstra@wpsoftware.net>
4//
5// To the extent possible under law, the author(s) have dedicated all
6// copyright and related and neighboring rights to this software to
7// the public domain worldwide. This software is distributed without
8// any warranty.
9//
10// You should have received a copy of the CC0 Public Domain Dedication
11// along with this software.
12// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
13//
14
15//! Example: Parsing a descriptor from a string
16
17extern crate bitcoin;
18extern crate sapio_miniscript as miniscript;
19
20use miniscript::{descriptor::DescriptorType, Descriptor, DescriptorTrait};
21use std::str::FromStr;
22
23fn main() {
24    let my_descriptor = miniscript::Descriptor::<bitcoin::PublicKey>::from_str(
25        "wsh(c:pk_k(020202020202020202020202020202020202020202020202020202020202020202))",
26    )
27    .unwrap();
28
29    // Check whether the descriptor is safe
30    // This checks whether all spend paths are accessible in bitcoin network.
31    // It maybe possible that some of the spend require more than 100 elements in Wsh scripts
32    // Or they contain a combination of timelock and heightlock.
33    assert!(my_descriptor.sanity_check().is_ok());
34
35    // Compute the script pubkey. As mentioned in the documentation, script_pubkey only fails
36    // for Tr descriptors that don't have some pre-computed data
37    assert_eq!(
38        format!("{:x}", my_descriptor.script_pubkey()),
39        "0020daef16dd7c946a3e735a6e43310cb2ce33dfd14a04f76bf8241a16654cb2f0f9"
40    );
41
42    // Another way to compute script pubkey
43    // We can also compute the type of descriptor
44    let desc_type = my_descriptor.desc_type();
45    assert_eq!(desc_type, DescriptorType::Wsh);
46    // Since we know the type of descriptor, we can get the Wsh struct from Descriptor
47    // This allows us to call infallible methods for getting script pubkey
48    if let Descriptor::Wsh(wsh) = &my_descriptor {
49        assert_eq!(
50            format!("{:x}", wsh.spk()),
51            "0020daef16dd7c946a3e735a6e43310cb2ce33dfd14a04f76bf8241a16654cb2f0f9"
52        );
53    } else {
54        // We checked for the descriptor type earlier
55    }
56
57    // Get the inner script inside the descriptor
58    assert_eq!(
59        format!(
60            "{:x}",
61            my_descriptor
62                .explicit_script()
63                .expect("Wsh descriptors have inner scripts")
64        ),
65        "21020202020202020202020202020202020202020202020202020202020202020202ac"
66    );
67
68    let desc = miniscript::Descriptor::<bitcoin::PublicKey>::from_str(
69        "sh(wsh(c:pk_k(020202020202020202020202020202020202020202020202020202020202020202)))",
70    )
71    .unwrap();
72
73    assert!(desc.desc_type() == DescriptorType::ShWsh);
74}
parse/parse.rs

parse/
parse.rs
