refactor!(bdk): require std feature for all impl of fmt::Display on E…

…rrors

use anyhow::Error in more doc tests

crates/bdk/src/descriptor/error.rs

@@ -55,6 +55,7 @@ impl From<crate::keys::KeyError> for Error {
     }
 }
 
+#[cfg(feature = "std")]
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {

crates/bdk/src/descriptor/policy.rs

@@ -518,6 +518,7 @@ pub enum PolicyError {
     IncompatibleConditions,
 }
 
+#[cfg(feature = "std")]
 impl fmt::Display for PolicyError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {

crates/bdk/src/keys/mod.rs

@@ -944,6 +944,7 @@ impl From<bip32::Error> for KeyError {
     }
 }
 
+#[cfg(feature = "std")]
 impl fmt::Display for KeyError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {

crates/bdk/src/wallet/coin_selection.rs

@@ -31,6 +31,7 @@
 //! # use bdk_chain::PersistBackend;
 //! # use bdk::*;
 //! # use bdk::wallet::coin_selection::decide_change;
+//! # use anyhow::Error;
 //! # const TXIN_BASE_WEIGHT: usize = (32 + 4 + 4) * 4;
 //! #[derive(Debug)]
 //! struct AlwaysSpendEverything;
@@ -96,7 +97,7 @@
 //!
 //! // inspect, sign, broadcast, ...
 //!
-//! # Ok::<(), CreateTxError<<() as PersistBackend<ChangeSet>>::WriteError>>(())
+//! # Ok::<(), anyhow::Error>(())
 //! ```
 
 use crate::types::FeeRate;
@@ -139,6 +140,7 @@ pub enum Error {
     BnBTotalTriesExceeded,
 }
 
+#[cfg(feature = "std")]
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         match self {

crates/bdk/src/wallet/error.rs

@@ -30,6 +30,7 @@ pub enum MiniscriptPsbtError {
     OutputUpdate(miniscript::psbt::OutputUpdateError),
 }
 
+#[cfg(feature = "std")]
 impl fmt::Display for MiniscriptPsbtError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {

crates/bdk/src/wallet/signer.rs

@@ -177,6 +177,7 @@ impl From<sighash::Error> for SignerError {
     }
 }
 
+#[cfg(feature = "std")]
 impl fmt::Display for SignerError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {

crates/bdk/src/wallet/tx_builder.rs

@@ -20,8 +20,9 @@
 //! # use bdk::wallet::ChangeSet;
 //! # use bdk::wallet::error::CreateTxError;
 //! # use bdk::wallet::tx_builder::CreateTx;
-//! # let to_address = Address::from_str("2N4eQYCbKUHCCTUjBJeHcJp9ok6J2GZsTDt").unwrap().assume_checked();
 //! # use bdk_chain::PersistBackend;
+//! # use anyhow::Error;
+//! # let to_address = Address::from_str("2N4eQYCbKUHCCTUjBJeHcJp9ok6J2GZsTDt").unwrap().assume_checked();
 //! # let mut wallet = doctest_wallet!();
 //! // create a TxBuilder from a wallet
 //! let mut tx_builder = wallet.build_tx();
@@ -36,7 +37,7 @@
 //!     // Turn on RBF signaling
 //!     .enable_rbf();
 //! let psbt = tx_builder.finish()?;
-//! # Ok::<(), CreateTxError<<() as PersistBackend<ChangeSet>>::WriteError>>(())
+//! # Ok::<(), anyhow::Error>(())
 //! ```
 
 use crate::collections::BTreeMap;
@@ -87,6 +88,7 @@ impl TxBuilderContext for BumpFee {}
 /// # use bdk::wallet::ChangeSet;
 /// # use bdk::wallet::error::CreateTxError;
 /// # use bdk_chain::PersistBackend;
+/// # use anyhow::Error;
 /// # let mut wallet = doctest_wallet!();
 /// # let addr1 = Address::from_str("2N4eQYCbKUHCCTUjBJeHcJp9ok6J2GZsTDt").unwrap().assume_checked();
 /// # let addr2 = addr1.clone();
@@ -111,7 +113,7 @@ impl TxBuilderContext for BumpFee {}
 /// };
 ///
 /// assert_eq!(psbt1.unsigned_tx.output[..2], psbt2.unsigned_tx.output[..2]);
-/// # Ok::<(), CreateTxError<<() as PersistBackend<ChangeSet>>::WriteError>>(())
+/// # Ok::<(), anyhow::Error>(())
 /// ```
 ///
 /// At the moment [`coin_selection`] is an exception to the rule as it consumes `self`.
@@ -655,6 +657,7 @@ impl<'a, D, Cs: CoinSelectionAlgorithm> TxBuilder<'a, D, Cs, CreateTx> {
     /// # use bdk::wallet::error::CreateTxError;
     /// # use bdk::wallet::tx_builder::CreateTx;
     /// # use bdk_chain::PersistBackend;
+    /// # use anyhow::Error;
     /// # let to_address =
     /// Address::from_str("2N4eQYCbKUHCCTUjBJeHcJp9ok6J2GZsTDt")
     ///     .unwrap()
@@ -670,7 +673,7 @@ impl<'a, D, Cs: CoinSelectionAlgorithm> TxBuilder<'a, D, Cs, CreateTx> {
     ///     .fee_rate(bdk::FeeRate::from_sat_per_vb(5.0))
     ///     .enable_rbf();
     /// let psbt = tx_builder.finish()?;
-    /// # Ok::<(), CreateTxError<<() as PersistBackend<ChangeSet>>::WriteError>>(())
+    /// # Ok::<(), anyhow::Error>(())
     /// ```
     ///
     /// [`allow_shrinking`]: Self::allow_shrinking