1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
// Bitcoin Dev Kit
// Written in 2020 by Alekos Filini <alekos.filini@gmail.com>
//
// Copyright (c) 2020-2021 Bitcoin Dev Kit Developers
//
// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
// You may not use this file except in accordance with one or both of these
// licenses.

//! Descriptors
//!
//! This module contains generic utilities to work with descriptors, plus some re-exported types
//! from [`miniscript`].

use crate::collections::BTreeMap;
use alloc::string::String;
use alloc::vec::Vec;

use bitcoin::bip32::{ChildNumber, DerivationPath, Fingerprint, KeySource, Xpub};
use bitcoin::{key::XOnlyPublicKey, secp256k1, PublicKey};
use bitcoin::{psbt, taproot};
use bitcoin::{Network, TxOut};

use miniscript::descriptor::{
    DefiniteDescriptorKey, DescriptorMultiXKey, DescriptorSecretKey, DescriptorType,
    DescriptorXKey, InnerXKey, KeyMap, SinglePubKey, Wildcard,
};
pub use miniscript::{
    Descriptor, DescriptorPublicKey, Legacy, Miniscript, ScriptContext, Segwitv0,
};
use miniscript::{ForEachKey, MiniscriptKey, TranslatePk};

use crate::descriptor::policy::BuildSatisfaction;

pub mod checksum;
#[doc(hidden)]
pub mod dsl;
pub mod error;
pub mod policy;
pub mod template;

pub use self::checksum::calc_checksum;
pub use self::error::Error as DescriptorError;
pub use self::policy::Policy;
use self::template::DescriptorTemplateOut;
use crate::keys::{IntoDescriptorKey, KeyError};
use crate::wallet::signer::SignersContainer;
use crate::wallet::utils::SecpCtx;

/// Alias for a [`Descriptor`] that can contain extended keys using [`DescriptorPublicKey`]
pub type ExtendedDescriptor = Descriptor<DescriptorPublicKey>;

/// Alias for a [`Descriptor`] that contains extended **derived** keys
pub type DerivedDescriptor = Descriptor<DefiniteDescriptorKey>;

/// Alias for the type of maps that represent derivation paths in a [`psbt::Input`] or
/// [`psbt::Output`]
///
/// [`psbt::Input`]: bitcoin::psbt::Input
/// [`psbt::Output`]: bitcoin::psbt::Output
pub type HdKeyPaths = BTreeMap<secp256k1::PublicKey, KeySource>;

/// Alias for the type of maps that represent taproot key origins in a [`psbt::Input`] or
/// [`psbt::Output`]
///
/// [`psbt::Input`]: bitcoin::psbt::Input
/// [`psbt::Output`]: bitcoin::psbt::Output
pub type TapKeyOrigins = BTreeMap<XOnlyPublicKey, (Vec<taproot::TapLeafHash>, KeySource)>;

/// Trait for types which can be converted into an [`ExtendedDescriptor`] and a [`KeyMap`] usable by a wallet in a specific [`Network`]
pub trait IntoWalletDescriptor {
    /// Convert to wallet descriptor
    fn into_wallet_descriptor(
        self,
        secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError>;
}

impl IntoWalletDescriptor for &str {
    fn into_wallet_descriptor(
        self,
        secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError> {
        let descriptor = match self.split_once('#') {
            Some((desc, original_checksum)) => {
                let checksum = calc_checksum(desc)?;
                if original_checksum != checksum {
                    return Err(DescriptorError::InvalidDescriptorChecksum);
                }
                desc
            }
            None => self,
        };

        ExtendedDescriptor::parse_descriptor(secp, descriptor)?
            .into_wallet_descriptor(secp, network)
    }
}

impl IntoWalletDescriptor for &String {
    fn into_wallet_descriptor(
        self,
        secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError> {
        self.as_str().into_wallet_descriptor(secp, network)
    }
}

impl IntoWalletDescriptor for String {
    fn into_wallet_descriptor(
        self,
        secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError> {
        self.as_str().into_wallet_descriptor(secp, network)
    }
}

impl IntoWalletDescriptor for ExtendedDescriptor {
    fn into_wallet_descriptor(
        self,
        secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError> {
        (self, KeyMap::default()).into_wallet_descriptor(secp, network)
    }
}

impl IntoWalletDescriptor for (ExtendedDescriptor, KeyMap) {
    fn into_wallet_descriptor(
        self,
        secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError> {
        use crate::keys::DescriptorKey;

        struct Translator<'s, 'd> {
            secp: &'s SecpCtx,
            descriptor: &'d ExtendedDescriptor,
            network: Network,
        }

        impl<'s, 'd> miniscript::Translator<DescriptorPublicKey, String, DescriptorError>
            for Translator<'s, 'd>
        {
            fn pk(&mut self, pk: &DescriptorPublicKey) -> Result<String, DescriptorError> {
                let secp = &self.secp;

                let (_, _, networks) = if self.descriptor.is_taproot() {
                    let descriptor_key: DescriptorKey<miniscript::Tap> =
                        pk.clone().into_descriptor_key()?;
                    descriptor_key.extract(secp)?
                } else if self.descriptor.is_witness() {
                    let descriptor_key: DescriptorKey<miniscript::Segwitv0> =
                        pk.clone().into_descriptor_key()?;
                    descriptor_key.extract(secp)?
                } else {
                    let descriptor_key: DescriptorKey<miniscript::Legacy> =
                        pk.clone().into_descriptor_key()?;
                    descriptor_key.extract(secp)?
                };

                if networks.contains(&self.network) {
                    Ok(Default::default())
                } else {
                    Err(DescriptorError::Key(KeyError::InvalidNetwork))
                }
            }
            fn sha256(
                &mut self,
                _sha256: &<DescriptorPublicKey as MiniscriptKey>::Sha256,
            ) -> Result<String, DescriptorError> {
                Ok(Default::default())
            }
            fn hash256(
                &mut self,
                _hash256: &<DescriptorPublicKey as MiniscriptKey>::Hash256,
            ) -> Result<String, DescriptorError> {
                Ok(Default::default())
            }
            fn ripemd160(
                &mut self,
                _ripemd160: &<DescriptorPublicKey as MiniscriptKey>::Ripemd160,
            ) -> Result<String, DescriptorError> {
                Ok(Default::default())
            }
            fn hash160(
                &mut self,
                _hash160: &<DescriptorPublicKey as MiniscriptKey>::Hash160,
            ) -> Result<String, DescriptorError> {
                Ok(Default::default())
            }
        }

        // check the network for the keys
        use miniscript::TranslateErr;
        match self.0.translate_pk(&mut Translator {
            secp,
            network,
            descriptor: &self.0,
        }) {
            Ok(_) => {}
            Err(TranslateErr::TranslatorErr(e)) => return Err(e),
            Err(TranslateErr::OuterError(e)) => return Err(e.into()),
        }

        Ok(self)
    }
}

impl IntoWalletDescriptor for DescriptorTemplateOut {
    fn into_wallet_descriptor(
        self,
        _secp: &SecpCtx,
        network: Network,
    ) -> Result<(ExtendedDescriptor, KeyMap), DescriptorError> {
        struct Translator {
            network: Network,
        }

        impl miniscript::Translator<DescriptorPublicKey, DescriptorPublicKey, DescriptorError>
            for Translator
        {
            fn pk(
                &mut self,
                pk: &DescriptorPublicKey,
            ) -> Result<DescriptorPublicKey, DescriptorError> {
                // workaround for xpubs generated by other key types, like bip39: since when the
                // conversion is made one network has to be chosen, what we generally choose
                // "mainnet", but then override the set of valid networks to specify that all of
                // them are valid. here we reset the network to make sure the wallet struct gets a
                // descriptor with the right network everywhere.
                let pk = match pk {
                    DescriptorPublicKey::XPub(ref xpub) => {
                        let mut xpub = xpub.clone();
                        xpub.xkey.network = self.network.into();

                        DescriptorPublicKey::XPub(xpub)
                    }
                    other => other.clone(),
                };

                Ok(pk)
            }
            miniscript::translate_hash_clone!(
                DescriptorPublicKey,
                DescriptorPublicKey,
                DescriptorError
            );
        }

        let (desc, keymap, networks) = self;

        if !networks.contains(&network) {
            return Err(DescriptorError::Key(KeyError::InvalidNetwork));
        }

        // fixup the network for keys that need it in the descriptor
        use miniscript::TranslateErr;
        let translated = match desc.translate_pk(&mut Translator { network }) {
            Ok(descriptor) => descriptor,
            Err(TranslateErr::TranslatorErr(e)) => return Err(e),
            Err(TranslateErr::OuterError(e)) => return Err(e.into()),
        };
        // ...and in the key map
        let fixed_keymap = keymap
            .into_iter()
            .map(|(mut k, mut v)| {
                match (&mut k, &mut v) {
                    (DescriptorPublicKey::XPub(xpub), DescriptorSecretKey::XPrv(xprv)) => {
                        xpub.xkey.network = network.into();
                        xprv.xkey.network = network.into();
                    }
                    (_, DescriptorSecretKey::Single(key)) => {
                        key.key.network = network.into();
                    }
                    _ => {}
                }

                (k, v)
            })
            .collect();

        Ok((translated, fixed_keymap))
    }
}

/// Extra checks for [`ExtendedDescriptor`].
pub(crate) fn check_wallet_descriptor(
    descriptor: &Descriptor<DescriptorPublicKey>,
) -> Result<(), DescriptorError> {
    // Ensure the keys don't contain any hardened derivation steps or hardened wildcards
    let descriptor_contains_hardened_steps = descriptor.for_any_key(|k| {
        if let DescriptorPublicKey::XPub(DescriptorXKey {
            derivation_path,
            wildcard,
            ..
        }) = k
        {
            return *wildcard == Wildcard::Hardened
                || derivation_path.into_iter().any(ChildNumber::is_hardened);
        }

        false
    });
    if descriptor_contains_hardened_steps {
        return Err(DescriptorError::HardenedDerivationXpub);
    }

    if descriptor.is_multipath() {
        return Err(DescriptorError::MultiPath);
    }

    // Run miniscript's sanity check, which will look for duplicated keys and other potential
    // issues
    descriptor.sanity_check()?;

    Ok(())
}

#[doc(hidden)]
/// Used internally mainly by the `descriptor!()` and `fragment!()` macros
pub trait CheckMiniscript<Ctx: miniscript::ScriptContext> {
    fn check_miniscript(&self) -> Result<(), miniscript::Error>;
}

impl<Ctx: miniscript::ScriptContext, Pk: miniscript::MiniscriptKey> CheckMiniscript<Ctx>
    for miniscript::Miniscript<Pk, Ctx>
{
    fn check_miniscript(&self) -> Result<(), miniscript::Error> {
        Ctx::check_global_validity(self)?;

        Ok(())
    }
}

/// Trait implemented on [`Descriptor`]s to add a method to extract the spending [`policy`]
pub trait ExtractPolicy {
    /// Extract the spending [`policy`]
    fn extract_policy(
        &self,
        signers: &SignersContainer,
        psbt: BuildSatisfaction,
        secp: &SecpCtx,
    ) -> Result<Option<Policy>, DescriptorError>;
}

pub(crate) trait XKeyUtils {
    fn root_fingerprint(&self, secp: &SecpCtx) -> Fingerprint;
}

impl<T> XKeyUtils for DescriptorMultiXKey<T>
where
    T: InnerXKey,
{
    fn root_fingerprint(&self, secp: &SecpCtx) -> Fingerprint {
        match self.origin {
            Some((fingerprint, _)) => fingerprint,
            None => self.xkey.xkey_fingerprint(secp),
        }
    }
}

impl<T> XKeyUtils for DescriptorXKey<T>
where
    T: InnerXKey,
{
    fn root_fingerprint(&self, secp: &SecpCtx) -> Fingerprint {
        match self.origin {
            Some((fingerprint, _)) => fingerprint,
            None => self.xkey.xkey_fingerprint(secp),
        }
    }
}

pub(crate) trait DescriptorMeta {
    fn is_witness(&self) -> bool;
    fn is_taproot(&self) -> bool;
    fn get_extended_keys(&self) -> Vec<DescriptorXKey<Xpub>>;
    fn derive_from_hd_keypaths(
        &self,
        hd_keypaths: &HdKeyPaths,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor>;
    fn derive_from_tap_key_origins(
        &self,
        tap_key_origins: &TapKeyOrigins,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor>;
    fn derive_from_psbt_key_origins(
        &self,
        key_origins: BTreeMap<Fingerprint, (&DerivationPath, SinglePubKey)>,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor>;
    fn derive_from_psbt_input(
        &self,
        psbt_input: &psbt::Input,
        utxo: Option<TxOut>,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor>;
}

impl DescriptorMeta for ExtendedDescriptor {
    fn is_witness(&self) -> bool {
        matches!(
            self.desc_type(),
            DescriptorType::Wpkh
                | DescriptorType::ShWpkh
                | DescriptorType::Wsh
                | DescriptorType::ShWsh
                | DescriptorType::ShWshSortedMulti
                | DescriptorType::WshSortedMulti
        )
    }

    fn is_taproot(&self) -> bool {
        self.desc_type() == DescriptorType::Tr
    }

    fn get_extended_keys(&self) -> Vec<DescriptorXKey<Xpub>> {
        let mut answer = Vec::new();

        self.for_each_key(|pk| {
            if let DescriptorPublicKey::XPub(xpub) = pk {
                answer.push(xpub.clone());
            }

            true
        });

        answer
    }

    fn derive_from_psbt_key_origins(
        &self,
        key_origins: BTreeMap<Fingerprint, (&DerivationPath, SinglePubKey)>,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor> {
        // Ensure that deriving `xpub` with `path` yields `expected`
        let verify_key =
            |xpub: &DescriptorXKey<Xpub>, path: &DerivationPath, expected: &SinglePubKey| {
                let derived = xpub
                    .xkey
                    .derive_pub(secp, path)
                    .expect("The path should never contain hardened derivation steps")
                    .public_key;

                match expected {
                    SinglePubKey::FullKey(pk) if &PublicKey::new(derived) == pk => true,
                    SinglePubKey::XOnly(pk) if &XOnlyPublicKey::from(derived) == pk => true,
                    _ => false,
                }
            };

        let mut path_found = None;

        // using `for_any_key` should make this stop as soon as we return `true`
        self.for_any_key(|key| {
            if let DescriptorPublicKey::XPub(xpub) = key {
                // Check if the key matches one entry in our `key_origins`. If it does, `matches()` will
                // return the "prefix" that matched, so we remove that prefix from the full path
                // found in `key_origins` and save it in `derive_path`. We expect this to be a derivation
                // path of length 1 if the key is `wildcard` and an empty path otherwise.
                let root_fingerprint = xpub.root_fingerprint(secp);
                let derive_path = key_origins
                    .get_key_value(&root_fingerprint)
                    .and_then(|(fingerprint, (path, expected))| {
                        xpub.matches(&(*fingerprint, (*path).clone()), secp)
                            .zip(Some((path, expected)))
                    })
                    .and_then(|(prefix, (full_path, expected))| {
                        let derive_path = full_path
                            .into_iter()
                            .skip(prefix.into_iter().count())
                            .cloned()
                            .collect::<DerivationPath>();

                        // `derive_path` only contains the replacement index for the wildcard, if present, or
                        // an empty path for fixed descriptors. To verify the key we also need the normal steps
                        // that come before the wildcard, so we take them directly from `xpub` and then append
                        // the final index
                        if verify_key(
                            xpub,
                            &xpub.derivation_path.extend(derive_path.clone()),
                            expected,
                        ) {
                            Some(derive_path)
                        } else {
                            None
                        }
                    });

                match derive_path {
                    Some(path) if xpub.wildcard != Wildcard::None && path.len() == 1 => {
                        // Ignore hardened wildcards
                        if let ChildNumber::Normal { index } = path[0] {
                            path_found = Some(index);
                            return true;
                        }
                    }
                    Some(path) if xpub.wildcard == Wildcard::None && path.is_empty() => {
                        path_found = Some(0);
                        return true;
                    }
                    _ => {}
                }
            }

            false
        });

        path_found.map(|path| {
            self.at_derivation_index(path)
                .expect("We ignore hardened wildcards")
        })
    }

    fn derive_from_hd_keypaths(
        &self,
        hd_keypaths: &HdKeyPaths,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor> {
        // "Convert" an hd_keypaths map to the format required by `derive_from_psbt_key_origins`
        let key_origins = hd_keypaths
            .iter()
            .map(|(pk, (fingerprint, path))| {
                (
                    *fingerprint,
                    (path, SinglePubKey::FullKey(PublicKey::new(*pk))),
                )
            })
            .collect();
        self.derive_from_psbt_key_origins(key_origins, secp)
    }

    fn derive_from_tap_key_origins(
        &self,
        tap_key_origins: &TapKeyOrigins,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor> {
        // "Convert" a tap_key_origins map to the format required by `derive_from_psbt_key_origins`
        let key_origins = tap_key_origins
            .iter()
            .map(|(pk, (_, (fingerprint, path)))| (*fingerprint, (path, SinglePubKey::XOnly(*pk))))
            .collect();
        self.derive_from_psbt_key_origins(key_origins, secp)
    }

    fn derive_from_psbt_input(
        &self,
        psbt_input: &psbt::Input,
        utxo: Option<TxOut>,
        secp: &SecpCtx,
    ) -> Option<DerivedDescriptor> {
        if let Some(derived) = self.derive_from_hd_keypaths(&psbt_input.bip32_derivation, secp) {
            return Some(derived);
        }
        if let Some(derived) = self.derive_from_tap_key_origins(&psbt_input.tap_key_origins, secp) {
            return Some(derived);
        }
        if self.has_wildcard() {
            // We can't try to bruteforce the derivation index, exit here
            return None;
        }

        let descriptor = self.at_derivation_index(0).expect("0 is not hardened");
        match descriptor.desc_type() {
            // TODO: add pk() here
            DescriptorType::Pkh
            | DescriptorType::Wpkh
            | DescriptorType::ShWpkh
            | DescriptorType::Tr
                if utxo.is_some()
                    && descriptor.script_pubkey() == utxo.as_ref().unwrap().script_pubkey =>
            {
                Some(descriptor)
            }
            DescriptorType::Bare | DescriptorType::Sh | DescriptorType::ShSortedMulti
                if psbt_input.redeem_script.is_some()
                    && &descriptor.explicit_script().unwrap()
                        == psbt_input.redeem_script.as_ref().unwrap() =>
            {
                Some(descriptor)
            }
            DescriptorType::Wsh
            | DescriptorType::ShWsh
            | DescriptorType::ShWshSortedMulti
            | DescriptorType::WshSortedMulti
                if psbt_input.witness_script.is_some()
                    && &descriptor.explicit_script().unwrap()
                        == psbt_input.witness_script.as_ref().unwrap() =>
            {
                Some(descriptor)
            }
            _ => None,
        }
    }
}

#[cfg(test)]
mod test {
    use alloc::string::ToString;
    use core::str::FromStr;

    use assert_matches::assert_matches;
    use bitcoin::hex::FromHex;
    use bitcoin::secp256k1::Secp256k1;
    use bitcoin::{bip32, Psbt};
    use bitcoin::{NetworkKind, ScriptBuf};

    use super::*;
    use crate::psbt::PsbtUtils;

    #[test]
    fn test_derive_from_psbt_input_wpkh_wif() {
        let descriptor = Descriptor::<DescriptorPublicKey>::from_str(
            "wpkh(02b4632d08485ff1df2db55b9dafd23347d1c47a457072a1e87be26896549a8737)",
        )
        .unwrap();
        let psbt = Psbt::deserialize(
            &Vec::<u8>::from_hex(
                "70736274ff010052010000000162307be8e431fbaff807cdf9cdc3fde44d7402\
                 11bc8342c31ffd6ec11fe35bcc0100000000ffffffff01328601000000000016\
                 001493ce48570b55c42c2af816aeaba06cfee1224fae000000000001011fa086\
                 01000000000016001493ce48570b55c42c2af816aeaba06cfee1224fae010304\
                 010000000000",
            )
            .unwrap(),
        )
        .unwrap();

        assert!(descriptor
            .derive_from_psbt_input(&psbt.inputs[0], psbt.get_utxo_for(0), &Secp256k1::new())
            .is_some());
    }

    #[test]
    fn test_derive_from_psbt_input_pkh_tpub() {
        let descriptor = Descriptor::<DescriptorPublicKey>::from_str(
            "pkh([0f056943/44h/0h/0h]tpubDDpWvmUrPZrhSPmUzCMBHffvC3HyMAPnWDSAQNBTnj1iZeJa7BZQEttFiP4DS4GCcXQHezdXhn86Hj6LHX5EDstXPWrMaSneRWM8yUf6NFd/10/*)",
        )
        .unwrap();
        let psbt = Psbt::deserialize(
            &Vec::<u8>::from_hex(
                "70736274ff010053010000000145843b86be54a3cd8c9e38444e1162676c00df\
                 e7964122a70df491ea12fd67090100000000ffffffff01c19598000000000017\
                 a91432bb94283282f72b2e034709e348c44d5a4db0ef8700000000000100f902\
                 0000000001010167e99c0eb67640f3a1b6805f2d8be8238c947f8aaf49eb0a9c\
                 bee6a42c984200000000171600142b29a22019cca05b9c2b2d283a4c4489e1cf\
                 9f8ffeffffff02a01dced06100000017a914e2abf033cadbd74f0f4c74946201\
                 decd20d5c43c8780969800000000001976a9148b0fce5fb1264e599a65387313\
                 3c95478b902eb288ac02473044022015d9211576163fa5b001e84dfa3d44efd9\
                 86b8f3a0d3d2174369288b2b750906022048dacc0e5d73ae42512fd2b97e2071\
                 a8d0bce443b390b1fe0b8128fe70ec919e01210232dad1c5a67dcb0116d407e2\
                 52584228ab7ec00e8b9779d0c3ffe8114fc1a7d2c80600000103040100000022\
                 0603433b83583f8c4879b329dd08bbc7da935e4cc02f637ff746e05f0466ffb2\
                 a6a2180f0569432c00008000000080000000800a000000000000000000",
            )
            .unwrap(),
        )
        .unwrap();

        assert!(descriptor
            .derive_from_psbt_input(&psbt.inputs[0], psbt.get_utxo_for(0), &Secp256k1::new())
            .is_some());
    }

    #[test]
    fn test_derive_from_psbt_input_wsh() {
        let descriptor = Descriptor::<DescriptorPublicKey>::from_str(
            "wsh(and_v(v:pk(03b6633fef2397a0a9de9d7b6f23aef8368a6e362b0581f0f0af70d5ecfd254b14),older(6)))",
        )
        .unwrap();
        let psbt = Psbt::deserialize(
            &Vec::<u8>::from_hex(
                "70736274ff01005302000000011c8116eea34408ab6529223c9a176606742207\
                 67a1ff1d46a6e3c4a88243ea6e01000000000600000001109698000000000017\
                 a914ad105f61102e0d01d7af40d06d6a5c3ae2f7fde387000000000001012b80\
                 969800000000002200203ca72f106a72234754890ca7640c43f65d2174e44d33\
                 336030f9059345091044010304010000000105252103b6633fef2397a0a9de9d\
                 7b6f23aef8368a6e362b0581f0f0af70d5ecfd254b14ad56b20000",
            )
            .unwrap(),
        )
        .unwrap();

        assert!(descriptor
            .derive_from_psbt_input(&psbt.inputs[0], psbt.get_utxo_for(0), &Secp256k1::new())
            .is_some());
    }

    #[test]
    fn test_derive_from_psbt_input_sh() {
        let descriptor = Descriptor::<DescriptorPublicKey>::from_str(
            "sh(and_v(v:pk(021403881a5587297818fcaf17d239cefca22fce84a45b3b1d23e836c4af671dbb),after(630000)))",
        )
        .unwrap();
        let psbt = Psbt::deserialize(
            &Vec::<u8>::from_hex(
                "70736274ff0100530100000001bc8c13df445dfadcc42afa6dc841f85d22b01d\
                 a6270ebf981740f4b7b1d800390000000000feffffff01ba9598000000000017\
                 a91457b148ba4d3e5fa8608a8657875124e3d1c9390887f09c0900000100e002\
                 0000000001016ba1bbe05cc93574a0d611ec7d93ad0ab6685b28d0cd80e8a82d\
                 debb326643c90100000000feffffff02809698000000000017a914d9a6e8c455\
                 8e16c8253afe53ce37ad61cf4c38c487403504cf6100000017a9144044fb6e0b\
                 757dfc1b34886b6a95aef4d3db137e870247304402202a9b72d939bcde8ba2a1\
                 e0980597e47af4f5c152a78499143c3d0a78ac2286a602207a45b1df9e93b8c9\
                 6f09f5c025fe3e413ca4b905fe65ee55d32a3276439a9b8f012102dc1fcc2636\
                 4da1aa718f03d8d9bd6f2ff410ed2cf1245a168aa3bcc995ac18e0a806000001\
                 03040100000001042821021403881a5587297818fcaf17d239cefca22fce84a4\
                 5b3b1d23e836c4af671dbbad03f09c09b10000",
            )
            .unwrap(),
        )
        .unwrap();

        assert!(descriptor
            .derive_from_psbt_input(&psbt.inputs[0], psbt.get_utxo_for(0), &Secp256k1::new())
            .is_some());
    }

    #[test]
    fn test_to_wallet_descriptor_fixup_networks() {
        use crate::keys::{any_network, IntoDescriptorKey};

        let secp = Secp256k1::new();

        let xprv = bip32::Xpriv::from_str("xprv9s21ZrQH143K3c3gF1DUWpWNr2SG2XrG8oYPpqYh7hoWsJy9NjabErnzriJPpnGHyKz5NgdXmq1KVbqS1r4NXdCoKitWg5e86zqXHa8kxyB").unwrap();
        let path = bip32::DerivationPath::from_str("m/0").unwrap();

        // here `to_descriptor_key` will set the valid networks for the key to only mainnet, since
        // we are using an "xpub"
        let key = (xprv, path.clone()).into_descriptor_key().unwrap();
        // override it with any. this happens in some key conversions, like bip39
        let key = key.override_valid_networks(any_network());

        // make a descriptor out of it
        let desc = crate::descriptor!(wpkh(key)).unwrap();
        // this should convert the key that supports "any_network" to the right network (testnet)
        let (wallet_desc, keymap) = desc
            .into_wallet_descriptor(&secp, Network::Testnet)
            .unwrap();

        let mut xprv_testnet = xprv;
        xprv_testnet.network = NetworkKind::Test;

        let xpub_testnet = bip32::Xpub::from_priv(&secp, &xprv_testnet);
        let desc_pubkey = DescriptorPublicKey::XPub(DescriptorXKey {
            xkey: xpub_testnet,
            origin: None,
            derivation_path: path,
            wildcard: Wildcard::Unhardened,
        });

        assert_eq!(wallet_desc.to_string(), "wpkh(tpubD6NzVbkrYhZ4XtJzoDja5snUjBNQRP5B3f4Hyn1T1x6PVPxzzVjvw6nJx2D8RBCxog9GEVjZoyStfepTz7TtKoBVdkCtnc7VCJh9dD4RAU9/0/*)#a3svx0ha");
        assert_eq!(
            keymap
                .get(&desc_pubkey)
                .map(|key| key.to_public(&secp).unwrap()),
            Some(desc_pubkey)
        );
    }

    // test IntoWalletDescriptor trait from &str with and without checksum appended
    #[test]
    fn test_descriptor_from_str_with_checksum() {
        let secp = Secp256k1::new();

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)#tqz0nc62"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/1/2/*)#67ju93jw"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)#67ju93jw"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert_matches!(desc, Err(DescriptorError::InvalidDescriptorChecksum));

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)#67ju93jw"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert_matches!(desc, Err(DescriptorError::InvalidDescriptorChecksum));
    }

    // test IntoWalletDescriptor trait from &str with keys from right and wrong network
    #[test]
    fn test_descriptor_from_str_with_keys_network() {
        let secp = Secp256k1::new();

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Regtest);
        assert!(desc.is_ok());

        let desc = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Regtest);
        assert!(desc.is_ok());

        let desc = "sh(wpkh(02864bb4ad00cefa806098a69e192bbda937494e69eb452b87bb3f20f6283baedb))"
            .into_wallet_descriptor(&secp, Network::Testnet);
        assert!(desc.is_ok());

        let desc = "sh(wpkh(02864bb4ad00cefa806098a69e192bbda937494e69eb452b87bb3f20f6283baedb))"
            .into_wallet_descriptor(&secp, Network::Bitcoin);
        assert!(desc.is_ok());

        let desc = "wpkh(tprv8ZgxMBicQKsPdpkqS7Eair4YxjcuuvDPNYmKX3sCniCf16tHEVrjjiSXEkFRnUH77yXc6ZcwHHcLNfjdi5qUvw3VDfgYiH5mNsj5izuiu2N/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Bitcoin);
        assert_matches!(desc, Err(DescriptorError::Key(KeyError::InvalidNetwork)));

        let desc = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/1/2/*)"
            .into_wallet_descriptor(&secp, Network::Bitcoin);
        assert_matches!(desc, Err(DescriptorError::Key(KeyError::InvalidNetwork)));
    }

    // test IntoWalletDescriptor trait from the output of the descriptor!() macro
    #[test]
    fn test_descriptor_from_str_from_output_of_macro() {
        let secp = Secp256k1::new();

        let tpub = bip32::Xpub::from_str("tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK").unwrap();
        let path = bip32::DerivationPath::from_str("m/1/2").unwrap();
        let key = (tpub, path).into_descriptor_key().unwrap();

        // make a descriptor out of it
        let desc = crate::descriptor!(wpkh(key)).unwrap();

        let (wallet_desc, _) = desc
            .into_wallet_descriptor(&secp, Network::Testnet)
            .unwrap();
        let wallet_desc_str = wallet_desc.to_string();
        assert_eq!(wallet_desc_str, "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/1/2/*)#67ju93jw");

        let (wallet_desc2, _) = wallet_desc_str
            .into_wallet_descriptor(&secp, Network::Testnet)
            .unwrap();
        assert_eq!(wallet_desc, wallet_desc2)
    }

    #[test]
    fn test_check_wallet_descriptor() {
        let secp = Secp256k1::new();

        let descriptor = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/0'/1/2/*)";
        let (descriptor, _) = descriptor
            .into_wallet_descriptor(&secp, Network::Testnet)
            .expect("must parse");
        let result = check_wallet_descriptor(&descriptor);

        assert_matches!(result, Err(DescriptorError::HardenedDerivationXpub));

        let descriptor = "wpkh(tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/<0;1>/*)";
        let (descriptor, _) = descriptor
            .into_wallet_descriptor(&secp, Network::Testnet)
            .expect("must parse");
        let result = check_wallet_descriptor(&descriptor);

        assert_matches!(result, Err(DescriptorError::MultiPath));

        // repeated pubkeys
        let descriptor = "wsh(multi(2,tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/0/*,tpubD6NzVbkrYhZ4XHndKkuB8FifXm8r5FQHwrN6oZuWCz13qb93rtgKvD4PQsqC4HP4yhV3tA2fqr2RbY5mNXfM7RxXUoeABoDtsFUq2zJq6YK/0/*))";
        let (descriptor, _) = descriptor
            .into_wallet_descriptor(&secp, Network::Testnet)
            .expect("must parse");
        let result = check_wallet_descriptor(&descriptor);

        assert!(result.is_err());
    }

    #[test]
    fn test_sh_wsh_sortedmulti_redeemscript() {
        use miniscript::psbt::PsbtInputExt;

        let secp = Secp256k1::new();

        let descriptor = "sh(wsh(sortedmulti(3,tpubDEsqS36T4DVsKJd9UH8pAKzrkGBYPLEt9jZMwpKtzh1G6mgYehfHt9WCgk7MJG5QGSFWf176KaBNoXbcuFcuadAFKxDpUdMDKGBha7bY3QM/0/*,tpubDF3cpwfs7fMvXXuoQbohXtLjNM6ehwYT287LWtmLsd4r77YLg6MZg4vTETx5MSJ2zkfigbYWu31VA2Z2Vc1cZugCYXgS7FQu6pE8V6TriEH/0/*,tpubDE1SKfcW76Tb2AASv5bQWMuScYNAdoqLHoexw13sNDXwmUhQDBbCD3QAedKGLhxMrWQdMDKENzYtnXPDRvexQPNuDrLj52wAjHhNEm8sJ4p/0/*,tpubDFLc6oXwJmhm3FGGzXkfJNTh2KitoY3WhmmQvuAjMhD8YbyWn5mAqckbxXfm2etM3p5J6JoTpSrMqRSTfMLtNW46poDaEZJ1kjd3csRSjwH/0/*,tpubDEWD9NBeWP59xXmdqSNt4VYdtTGwbpyP8WS962BuqpQeMZmX9Pur14dhXdZT5a7wR1pK6dPtZ9fP5WR493hPzemnBvkfLLYxnUjAKj1JCQV/0/*,tpubDEHyZkkwd7gZWCTgQuYQ9C4myF2hMEmyHsBCCmLssGqoqUxeT3gzohF5uEVURkf9TtmeepJgkSUmteac38FwZqirjApzNX59XSHLcwaTZCH/0/*,tpubDEqLouCekwnMUWN486kxGzD44qVgeyuqHyxUypNEiQt5RnUZNJe386TKPK99fqRV1vRkZjYAjtXGTECz98MCsdLcnkM67U6KdYRzVubeCgZ/0/*)))";
        let (descriptor, _) = descriptor
            .into_wallet_descriptor(&secp, Network::Testnet)
            .unwrap();
        check_wallet_descriptor(&descriptor).expect("descriptor");

        let descriptor = descriptor.at_derivation_index(0).unwrap();

        let script = ScriptBuf::from_hex("5321022f533b667e2ea3b36e21961c9fe9dca340fbe0af5210173a83ae0337ab20a57621026bb53a98e810bd0ee61a0ed1164ba6c024786d76554e793e202dc6ce9c78c4ea2102d5b8a7d66a41ffdb6f4c53d61994022e886b4f45001fb158b95c9164d45f8ca3210324b75eead2c1f9c60e8adeb5e7009fec7a29afcdb30d829d82d09562fe8bae8521032d34f8932200833487bd294aa219dcbe000b9f9b3d824799541430009f0fa55121037468f8ea99b6c64788398b5ad25480cad08f4b0d65be54ce3a55fd206b5ae4722103f72d3d96663b0ea99b0aeb0d7f273cab11a8de37885f1dddc8d9112adb87169357ae").unwrap();

        let mut psbt_input = psbt::Input::default();
        psbt_input
            .update_with_descriptor_unchecked(&descriptor)
            .unwrap();

        assert_eq!(psbt_input.redeem_script, Some(script.to_p2wsh()));
        assert_eq!(psbt_input.witness_script, Some(script));
    }
}