Use Psbt instead of PSBT

Idiomatic Rust uses lowercase for acronyms for all characters after the
first e.g. `std::net::TcpStream`. PSBT (Partially Signed Bitcoin
Transaction) should be rendered `Psbt` in Rust code if we want to write
idiomatic Rust.

Use `Psbt` instead of `PSBT` when aliasing the import of
`PartiallySignedTransaction` from `bitcoin` library.

src/descriptor/policy.rs

@@ -61,7 +61,7 @@ use crate::wallet::utils::{self, After, Older, SecpCtx};
 use super::checksum::get_checksum;
 use super::error::Error;
 use super::XKeyUtils;
-use bitcoin::util::psbt::PartiallySignedTransaction as PSBT;
+use bitcoin::util::psbt::PartiallySignedTransaction as Psbt;
 use miniscript::psbt::PsbtInputSatisfier;
 
 /// Raw public key or extended key fingerprint
@@ -760,7 +760,7 @@ fn signature(
     policy
 }
 
-fn signature_in_psbt(psbt: &PSBT, key: &DescriptorPublicKey, secp: &SecpCtx) -> bool {
+fn signature_in_psbt(psbt: &Psbt, key: &DescriptorPublicKey, secp: &SecpCtx) -> bool {
     //TODO check signature validity
     psbt.inputs.iter().all(|input| match key {
         DescriptorPublicKey::SinglePub(key) => input.partial_sigs.contains_key(&key.key),
@@ -923,7 +923,7 @@ impl<Ctx: ScriptContext> ExtractPolicy for Miniscript<DescriptorPublicKey, Ctx>
     }
 }
 
-fn psbt_inputs_sat(psbt: &PSBT) -> impl Iterator<Item = PsbtInputSatisfier> {
+fn psbt_inputs_sat(psbt: &Psbt) -> impl Iterator<Item = PsbtInputSatisfier> {
     (0..psbt.inputs.len()).map(move |i| PsbtInputSatisfier::new(psbt, i))
 }
 
@@ -933,11 +933,11 @@ pub enum BuildSatisfaction<'a> {
     /// Don't generate `satisfaction` field
     None,
     /// Analyze the given PSBT to check for existing signatures
-    Psbt(&'a PSBT),
+    Psbt(&'a Psbt),
     /// Like `Psbt` variant and also check for expired timelocks
     PsbtTimelocks {
         /// Given PSBT
-        psbt: &'a PSBT,
+        psbt: &'a Psbt,
         /// Current blockchain height
         current_height: u32,
         /// The highest confirmation height between the inputs
@@ -946,7 +946,7 @@ pub enum BuildSatisfaction<'a> {
     },
 }
 impl<'a> BuildSatisfaction<'a> {
-    fn psbt(&self) -> Option<&'a PSBT> {
+    fn psbt(&self) -> Option<&'a Psbt> {
         match self {
             BuildSatisfaction::None => None,
             BuildSatisfaction::Psbt(psbt) => Some(psbt),
@@ -1475,7 +1475,7 @@ mod test {
 
         let signers_container = Arc::new(SignersContainer::from(keymap));
 
-        let psbt: PSBT = deserialize(&base64::decode(ALICE_SIGNED_PSBT).unwrap()).unwrap();
+        let psbt: Psbt = deserialize(&base64::decode(ALICE_SIGNED_PSBT).unwrap()).unwrap();
 
         let policy_alice_psbt = wallet_desc
             .extract_policy(&signers_container, BuildSatisfaction::Psbt(&psbt), &secp)
@@ -1490,7 +1490,7 @@ mod test {
             )
         );
 
-        let psbt: PSBT = deserialize(&base64::decode(BOB_SIGNED_PSBT).unwrap()).unwrap();
+        let psbt: Psbt = deserialize(&base64::decode(BOB_SIGNED_PSBT).unwrap()).unwrap();
         let policy_bob_psbt = wallet_desc
             .extract_policy(&signers_container, BuildSatisfaction::Psbt(&psbt), &secp)
             .unwrap()
@@ -1504,7 +1504,7 @@ mod test {
             )
         );
 
-        let psbt: PSBT = deserialize(&base64::decode(ALICE_BOB_SIGNED_PSBT).unwrap()).unwrap();
+        let psbt: Psbt = deserialize(&base64::decode(ALICE_BOB_SIGNED_PSBT).unwrap()).unwrap();
         let policy_alice_bob_psbt = wallet_desc
             .extract_policy(&signers_container, BuildSatisfaction::Psbt(&psbt), &secp)
             .unwrap()
@@ -1545,7 +1545,7 @@ mod test {
             addr.to_string()
         );
 
-        let psbt: PSBT =
+        let psbt: Psbt =
             deserialize(&base64::decode(PSBT_POLICY_CONSIDER_TIMELOCK_EXPIRED).unwrap()).unwrap();
 
         let build_sat = BuildSatisfaction::PsbtTimelocks {
@@ -1584,7 +1584,7 @@ mod test {
         );
         //println!("{}", serde_json::to_string(&policy_expired).unwrap());
 
-        let psbt_signed: PSBT =
+        let psbt_signed: Psbt =
             deserialize(&base64::decode(PSBT_POLICY_CONSIDER_TIMELOCK_EXPIRED_SIGNED).unwrap())
                 .unwrap();
 

src/psbt/mod.rs

@@ -9,14 +9,14 @@
 // You may not use this file except in accordance with one or both of these
 // licenses.
 
-use bitcoin::util::psbt::PartiallySignedTransaction as PSBT;
+use bitcoin::util::psbt::PartiallySignedTransaction as Psbt;
 use bitcoin::TxOut;
 
 pub trait PsbtUtils {
     fn get_utxo_for(&self, input_index: usize) -> Option<TxOut>;
 }
 
-impl PsbtUtils for PSBT {
+impl PsbtUtils for Psbt {
     fn get_utxo_for(&self, input_index: usize) -> Option<TxOut> {
         let tx = &self.global.unsigned_tx;
 
@@ -42,7 +42,7 @@ impl PsbtUtils for PSBT {
 mod test {
     use crate::bitcoin::consensus::deserialize;
     use crate::bitcoin::TxIn;
-    use crate::psbt::PSBT;
+    use crate::psbt::Psbt;
     use crate::wallet::test::{get_funded_wallet, get_test_wpkh};
     use crate::wallet::AddressIndex;
     use crate::SignOptions;
@@ -53,7 +53,7 @@ mod test {
     #[test]
     #[should_panic(expected = "InputIndexOutOfRange")]
     fn test_psbt_malformed_psbt_input_legacy() {
-        let psbt_bip: PSBT = deserialize(&base64::decode(PSBT_STR).unwrap()).unwrap();
+        let psbt_bip: Psbt = deserialize(&base64::decode(PSBT_STR).unwrap()).unwrap();
         let (wallet, _, _) = get_funded_wallet(get_test_wpkh());
         let send_to = wallet.get_address(AddressIndex::New).unwrap();
         let mut builder = wallet.build_tx();
@@ -70,7 +70,7 @@ mod test {
     #[test]
     #[should_panic(expected = "InputIndexOutOfRange")]
     fn test_psbt_malformed_psbt_input_segwit() {
-        let psbt_bip: PSBT = deserialize(&base64::decode(PSBT_STR).unwrap()).unwrap();
+        let psbt_bip: Psbt = deserialize(&base64::decode(PSBT_STR).unwrap()).unwrap();
         let (wallet, _, _) = get_funded_wallet(get_test_wpkh());
         let send_to = wallet.get_address(AddressIndex::New).unwrap();
         let mut builder = wallet.build_tx();
@@ -102,7 +102,7 @@ mod test {
 
     #[test]
     fn test_psbt_sign_with_finalized() {
-        let psbt_bip: PSBT = deserialize(&base64::decode(PSBT_STR).unwrap()).unwrap();
+        let psbt_bip: Psbt = deserialize(&base64::decode(PSBT_STR).unwrap()).unwrap();
         let (wallet, _, _) = get_funded_wallet(get_test_wpkh());
         let send_to = wallet.get_address(AddressIndex::New).unwrap();
         let mut builder = wallet.build_tx();

src/wallet/mod.rs

@@ -25,7 +25,7 @@ use bitcoin::consensus::encode::serialize;
 use bitcoin::util::base58;
 use bitcoin::util::psbt::raw::Key as PSBTKey;
 use bitcoin::util::psbt::Input;
-use bitcoin::util::psbt::PartiallySignedTransaction as PSBT;
+use bitcoin::util::psbt::PartiallySignedTransaction as Psbt;
 use bitcoin::{Address, Network, OutPoint, Script, SigHashType, Transaction, TxOut, Txid};
 
 use miniscript::descriptor::DescriptorTrait;
@@ -371,7 +371,7 @@ where
         &self,
         coin_selection: Cs,
         params: TxParams,
-    ) -> Result<(PSBT, TransactionDetails), Error> {
+    ) -> Result<(Psbt, TransactionDetails), Error> {
         let external_policy = self
             .descriptor
             .extract_policy(&self.signers, BuildSatisfaction::None, &self.secp)?
@@ -857,7 +857,7 @@ where
     /// let  finalized = wallet.sign(&mut psbt, SignOptions::default())?;
     /// assert!(finalized, "we should have signed all the inputs");
     /// # Ok::<(), bdk::Error>(())
-    pub fn sign(&self, psbt: &mut PSBT, sign_options: SignOptions) -> Result<bool, Error> {
+    pub fn sign(&self, psbt: &mut Psbt, sign_options: SignOptions) -> Result<bool, Error> {
         // this helps us doing our job later
         self.add_input_hd_keypaths(psbt)?;
 
@@ -927,7 +927,7 @@ where
     /// Try to finalize a PSBT
     ///
     /// The [`SignOptions`] can be used to tweak the behavior of the finalizer.
-    pub fn finalize_psbt(&self, psbt: &mut PSBT, sign_options: SignOptions) -> Result<bool, Error> {
+    pub fn finalize_psbt(&self, psbt: &mut Psbt, sign_options: SignOptions) -> Result<bool, Error> {
         let tx = &psbt.global.unsigned_tx;
         let mut finished = true;
 
@@ -1228,10 +1228,10 @@ where
         tx: Transaction,
         selected: Vec<Utxo>,
         params: TxParams,
-    ) -> Result<PSBT, Error> {
+    ) -> Result<Psbt, Error> {
         use bitcoin::util::psbt::serialize::Serialize;
 
-        let mut psbt = PSBT::from_unsigned_tx(tx)?;
+        let mut psbt = Psbt::from_unsigned_tx(tx)?;
 
         if params.add_global_xpubs {
             let mut all_xpubs = self.descriptor.get_extended_keys()?;
@@ -1371,7 +1371,7 @@ where
         Ok(psbt_input)
     }
 
-    fn add_input_hd_keypaths(&self, psbt: &mut PSBT) -> Result<(), Error> {
+    fn add_input_hd_keypaths(&self, psbt: &mut Psbt) -> Result<(), Error> {
         let mut input_utxos = Vec::with_capacity(psbt.inputs.len());
         for n in 0..psbt.inputs.len() {
             input_utxos.push(psbt.get_utxo_for(n).clone());

src/wallet/tx_builder.rs

@@ -41,7 +41,7 @@ use std::collections::HashSet;
 use std::default::Default;
 use std::marker::PhantomData;
 
-use bitcoin::util::psbt::{self, PartiallySignedTransaction as PSBT};
+use bitcoin::util::psbt::{self, PartiallySignedTransaction as Psbt};
 use bitcoin::{OutPoint, Script, SigHashType, Transaction};
 
 use miniscript::descriptor::DescriptorTrait;
@@ -521,7 +521,7 @@ impl<'a, B, D: BatchDatabase, Cs: CoinSelectionAlgorithm<D>, Ctx: TxBuilderConte
     /// Returns the [`BIP174`] "PSBT" and summary details about the transaction.
     ///
     /// [`BIP174`]: https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki
-    pub fn finish(self) -> Result<(PSBT, TransactionDetails), Error> {
+    pub fn finish(self) -> Result<(Psbt, TransactionDetails), Error> {
         self.wallet.create_tx(self.coin_selection, self.params)
     }