Upgrade `maia`

This gives us access to the `TxBuilder` for the lock transaction.

Cargo.lock

@@ -1441,7 +1441,7 @@ dependencies = [
 [[package]]
 name = "maia"
 version = "0.1.0"
-source = "git+https://github.com/comit-network/maia#4dd8adaf88f4c9ec244412319ac5e4ed67b509ec"
+source = "git+https://github.com/comit-network/maia#5e6d44882ced923c19f45c55a825b961c9b1e396"
 dependencies = [
  "anyhow",
  "bdk",

daemon/src/wallet.rs

@@ -5,9 +5,10 @@ use bdk::bitcoin::util::bip32::ExtendedPrivKey;
 use bdk::bitcoin::util::psbt::PartiallySignedTransaction;
 use bdk::bitcoin::{Address, Amount, PublicKey, Script, Transaction, Txid};
 use bdk::blockchain::{ElectrumBlockchain, NoopProgress};
+use bdk::wallet::tx_builder::TxOrdering;
 use bdk::wallet::AddressIndex;
 use bdk::{electrum_client, FeeRate, KeychainKind, SignOptions};
-use maia::{PartyParams, WalletExt};
+use maia::{PartyParams, TxBuilderExt};
 use rocket::serde::json::Value;
 
 use std::path::Path;
@@ -123,7 +124,21 @@ impl Actor {
             identity_pk,
         }: BuildPartyParams,
     ) -> Result<PartyParams> {
-        self.wallet.build_party_params(amount, identity_pk)
+        let mut builder = self.wallet.build_tx();
+
+        builder
+            .ordering(TxOrdering::Bip69Lexicographic) // TODO: I think this is pointless but we did this in maia.
+            .fee_rate(FeeRate::from_sat_per_vb(1.0))
+            .add_2of2_multisig_recipient(amount);
+
+        let (psbt, _) = builder.finish()?;
+
+        Ok(PartyParams {
+            lock_psbt: psbt,
+            identity_pk,
+            lock_amount: amount,
+            address: self.wallet.get_address(AddressIndex::New)?.address,
+        })
     }
 
     pub fn handle_try_broadcast_transaction(

daemon/tests/harness/mocks/wallet.rs

@@ -2,10 +2,13 @@ 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::model::{Timestamp, WalletInfo};
 use daemon::wallet;
 use maia::secp256k1_zkp::Secp256k1;
-use maia::{PartyParams, WalletExt};
+use maia::{PartyParams, TxBuilderExt};
 use mockall::*;
 use rand::thread_rng;
 use std::sync::Arc;
@@ -74,8 +77,19 @@ 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 party_params = wallet
-        .build_party_params(msg.amount, msg.identity_pk)
-        .unwrap();
-    Ok(party_params)
+    let mut builder = wallet.build_tx();
+
+    builder
+        .ordering(TxOrdering::Bip69Lexicographic) // TODO: I think this is pointless but we did this in maia.
+        .fee_rate(FeeRate::from_sat_per_vb(1.0))
+        .add_2of2_multisig_recipient(msg.amount);
+
+    let (psbt, _) = builder.finish()?;
+
+    Ok(PartyParams {
+        lock_psbt: psbt,
+        identity_pk: msg.identity_pk,
+        lock_amount: msg.amount,
+        address: wallet.get_address(AddressIndex::New)?.address,
+    })
 }