Move `dummy_wallet` to `daemon::bdk_ext::new_test_wallet`

This wallet is also useful for unit tests. Move it out of the harness
into the library.

daemon/src/bdk_ext.rs

@@ -0,0 +1,34 @@
+use anyhow::Result;
+use bdk::bitcoin::util::bip32::ExtendedPrivKey;
+use bdk::bitcoin::{self, Amount, Network};
+use rand::{CryptoRng, RngCore};
+
+pub fn new_test_wallet(
+    rng: &mut (impl RngCore + CryptoRng),
+    utxo_amount: Amount,
+    num_utxos: u8,
+) -> Result<bdk::Wallet<(), bdk::database::MemoryDatabase>> {
+    use bdk::{populate_test_db, testutils};
+
+    let mut seed = [0u8; 32];
+    rng.fill_bytes(&mut seed);
+
+    let key = ExtendedPrivKey::new_master(Network::Regtest, &seed)?;
+    let descriptors = testutils!(@descriptors (&format!("wpkh({}/*)", key)));
+
+    let mut database = bdk::database::MemoryDatabase::new();
+
+    for index in 0..num_utxos {
+        populate_test_db!(
+            &mut database,
+            testutils! {
+                @tx ( (@external descriptors, index as u32) => utxo_amount.as_sat() ) (@confirmations 1)
+            },
+            Some(100)
+        );
+    }
+
+    let wallet = bdk::Wallet::new_offline(&descriptors.0, None, Network::Regtest, database)?;
+
+    Ok(wallet)
+}

daemon/src/lib.rs

@@ -23,6 +23,7 @@ pub mod sqlx_ext; // Must come first because it is a macro.
 pub mod actors;
 pub mod address_map;
 pub mod auth;
+pub mod bdk_ext;
 pub mod bitmex_price_feed;
 pub mod cfd_actors;
 pub mod collab_settlement_taker;

daemon/tests/harness/maia.rs

@@ -1,42 +1,7 @@
-use anyhow::Result;
-use bdk::bitcoin;
-use bdk::bitcoin::util::bip32::ExtendedPrivKey;
-use bdk::bitcoin::{Amount, Network};
-use maia::secp256k1_zkp::rand::{CryptoRng, RngCore};
 use maia::secp256k1_zkp::{schnorrsig, SecretKey};
 use maia::Announcement;
 use std::str::FromStr;
 
-pub fn dummy_wallet(
-    rng: &mut (impl RngCore + CryptoRng),
-    utxo_amount: Amount,
-    num_utxos: u8,
-) -> Result<bdk::Wallet<(), bdk::database::MemoryDatabase>> {
-    use bdk::{populate_test_db, testutils};
-
-    let mut seed = [0u8; 32];
-    rng.fill_bytes(&mut seed);
-
-    let key = ExtendedPrivKey::new_master(Network::Regtest, &seed)?;
-    let descriptors = testutils!(@descriptors (&format!("wpkh({}/*)", key)));
-
-    let mut database = bdk::database::MemoryDatabase::new();
-
-    for index in 0..num_utxos {
-        populate_test_db!(
-            &mut database,
-            testutils! {
-                @tx ( (@external descriptors, index as u32) => utxo_amount.as_sat() ) (@confirmations 1)
-            },
-            Some(100)
-        );
-    }
-
-    let wallet = bdk::Wallet::new_offline(&descriptors.0, None, Network::Regtest, database)?;
-
-    Ok(wallet)
-}
-
 #[allow(dead_code)]
 pub struct OliviaData {
     id: String,

daemon/tests/harness/mocks/wallet.rs

@@ -1,10 +1,10 @@
-use crate::harness::maia::dummy_wallet;
 use anyhow::Result;
 use bdk::bitcoin::util::psbt::PartiallySignedTransaction;
 use bdk::bitcoin::{ecdsa, Amount, Txid};
 use bdk::wallet::tx_builder::TxOrdering;
 use bdk::wallet::AddressIndex;
 use bdk::FeeRate;
+use daemon::bdk_ext::new_test_wallet;
 use daemon::model::{Timestamp, WalletInfo};
 use daemon::wallet;
 use maia::secp256k1_zkp::Secp256k1;
@@ -75,7 +75,7 @@ fn dummy_wallet_info() -> Result<WalletInfo> {
 
 pub fn build_party_params(msg: wallet::BuildPartyParams) -> Result<PartyParams> {
     let mut rng = thread_rng();
-    let wallet = dummy_wallet(&mut rng, Amount::from_btc(0.4).unwrap(), 5).unwrap();
+    let wallet = new_test_wallet(&mut rng, Amount::from_btc(0.4).unwrap(), 5).unwrap();
 
     let mut builder = wallet.build_tx();