Merge #1441: Remove duplicated InsufficientFunds error member

29c8a00 chore(wallet): remove duplicated InsufficientFunds error member from CreateTxError (e1a0a0ea)

Pull request description:

  closes #1440

  ### Description

  - Replace `CreateTxError::InsufficientFunds` use by `coin_selection::Error::InsufficientFunds`
  - Remove `InsufficientFunds` member from `CreateTxError` enum
  - Rename `coin_selection::Error` to `coin_selection::CoinSelectionError`

  ### Notes to the reviewers

  - We could also keep both members but rename one of them to avoid confusion

  ### Checklists

  #### All Submissions:

  * [X] I've signed all my commits
  * [X] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
  * [X] I ran `cargo fmt` and `cargo clippy` before committing

ACKs for top commit:
  evanlinjin:
    ACK 29c8a00
  notmandatory:
    ACK 29c8a00

Tree-SHA512: a1132d09929f99f0a5e82d3ccfaa85695ae50d7d4d5d9e8fd9ef847313918ed8c7a01005f45483fef6aeae36730a0da2fed9a9f10c3ce2f0a679527caf798bfe

crates/wallet/src/wallet/error.rs

@@ -92,13 +92,6 @@ pub enum CreateTxError {
     OutputBelowDustLimit(usize),
     /// There was an error with coin selection
     CoinSelection(coin_selection::Error),
-    /// Wallet's UTXO set is not enough to cover recipient's requested plus fee
-    InsufficientFunds {
-        /// Sats needed for some transaction
-        needed: u64,
-        /// Sats available for spending
-        available: u64,
-    },
     /// Cannot build a tx without recipients
     NoRecipients,
     /// Partially signed bitcoin transaction error
@@ -176,13 +169,6 @@ impl fmt::Display for CreateTxError {
                 write!(f, "Output below the dust limit: {}", limit)
             }
             CreateTxError::CoinSelection(e) => e.fmt(f),
-            CreateTxError::InsufficientFunds { needed, available } => {
-                write!(
-                    f,
-                    "Insufficient funds: {} sat available of {} sat needed",
-                    available, needed
-                )
-            }
             CreateTxError::NoRecipients => {
                 write!(f, "Cannot build tx without recipients")
             }

crates/wallet/src/wallet/mod.rs

@@ -73,6 +73,8 @@ use crate::types::*;
 use crate::wallet::coin_selection::Excess::{Change, NoChange};
 use crate::wallet::error::{BuildFeeBumpError, CreateTxError, MiniscriptPsbtError};
 
+use self::coin_selection::Error;
+
 const COINBASE_MATURITY: u32 = 100;
 
 /// A Bitcoin wallet
@@ -1562,10 +1564,10 @@ impl Wallet {
                     change_fee,
                 } = excess
                 {
-                    return Err(CreateTxError::InsufficientFunds {
+                    return Err(CreateTxError::CoinSelection(Error::InsufficientFunds {
                         needed: *dust_threshold,
                         available: remaining_amount.saturating_sub(*change_fee),
-                    });
+                    }));
                 }
             } else {
                 return Err(CreateTxError::NoRecipients);