feat: add sent_and_received method on wallet

bdk-ffi/src/bdk.udl

@@ -95,6 +95,8 @@ interface Wallet {
 
   [Throws=BdkError]
   boolean sign(PartiallySignedTransaction psbt);
+
+  SentAndReceivedValues sent_and_received([ByRef] Transaction tx);
 };
 
 interface Update {};
@@ -235,6 +237,11 @@ dictionary ScriptAmount {
   u64 amount;
 };
 
+dictionary SentAndReceivedValues {
+    u64 sent;
+    u64 received;
+};
+
 // ------------------------------------------------------------------------
 // bdk crate - bitcoin re-exports
 // ------------------------------------------------------------------------

bdk-ffi/src/lib.rs

@@ -39,6 +39,11 @@ pub struct ScriptAmount {
     pub amount: u64,
 }
 
+pub struct SentAndReceivedValues {
+    pub sent: u64,
+    pub received: u64,
+}
+
 /// A derived address and the index it was found at.
 pub struct AddressInfo {
     /// Child index of this address.

bdk-ffi/src/wallet.rs

@@ -1,4 +1,4 @@
-use crate::bitcoin::{OutPoint, PartiallySignedTransaction};
+use crate::bitcoin::{OutPoint, PartiallySignedTransaction, Transaction};
 use crate::descriptor::Descriptor;
 use crate::{AddressIndex, AddressInfo, Network, ScriptAmount};
 use crate::{Balance, Script};
@@ -13,6 +13,8 @@ use bdk::{SignOptions, Wallet as BdkWallet};
 use bdk::wallet::tx_builder::ChangeSpendPolicy;
 use std::sync::{Arc, Mutex, MutexGuard};
 
+use crate::SentAndReceivedValues;
+
 #[derive(Debug)]
 pub struct Wallet {
     // TODO 8: Do we really need the mutex on the wallet? Could this be an Arc?
@@ -92,6 +94,11 @@ impl Wallet {
             .sign(&mut psbt, SignOptions::default())
             .map_err(|e| BdkError::Generic(e.to_string()))
     }
+
+    pub fn sent_and_received(&self, tx: &Transaction) -> SentAndReceivedValues {
+        let (sent, received): (u64, u64) = self.get_wallet().sent_and_received(&tx.clone().into());
+        SentAndReceivedValues { sent, received }
+    }
 }
 
 pub struct Update(pub(crate) BdkUpdate);