add bitcoin core client into global state

Cargo.lock

@@ -253,6 +253,7 @@ name = "mm_server"
 version = "0.1.0"
 dependencies = [
  "bitcoin",
+ "bitcoincore-rpc",
  "common",
  "dlctix",
  "hex",

demo/mm_server/Cargo.toml

@@ -15,3 +15,4 @@ hex = "0.4.3"
 serdect = "0.2.0"
 serde = "1.0.197"
 serde_json = "1.0.114"
+bitcoincore-rpc = "0.18.0"

demo/mm_server/src/global_state.rs

@@ -34,6 +34,7 @@ pub(crate) enum Stage {
 pub(crate) struct GlobalState {
     pub(crate) event: EventAnnouncement,
     pub(crate) odds: OutcomeOdds,
+    pub(crate) bitcoind: bitcoincore_rpc::Client,
     pub(crate) market_maker_seckey: Scalar,
     pub(crate) market_maker_pubkey: Point,
     pub(crate) registrations: HashMap<PlayerID, PlayerRegistration>,

demo/mm_server/src/main.rs

@@ -3,6 +3,8 @@ mod global_state;
 mod payouts;
 mod server;
 
+use bitcoincore_rpc::RpcApi;
+
 use crate::global_state::{GlobalState, Stage};
 use common::OutcomeOdds;
 use dlctix::secp::Scalar;
@@ -28,11 +30,23 @@ fn run_server() -> Result<(), Box<dyn Error>> {
     let odds: OutcomeOdds =
         serde_cbor::from_slice(&hex::decode(env::var("DLC_EVENT_ODDS_CBOR")?)?)?;
 
+    let bitcoind = {
+        let bitcoind_rpc_url = std::env::var("BITCOIND_RPC_URL")?;
+        let bitcoind_auth_username = std::env::var("BITCOIND_RPC_AUTH_USERNAME")?;
+        let bitcoind_auth_password = std::env::var("BITCOIND_RPC_AUTH_PASSWORD")?;
+        let auth = bitcoincore_rpc::Auth::UserPass(bitcoind_auth_username, bitcoind_auth_password);
+        bitcoincore_rpc::Client::new(&bitcoind_rpc_url, auth)?
+    };
+
+    // Check that a wallet is loaded
+    let _ = bitcoind.get_wallet_info()?;
+
     let global_state = Arc::new(RwLock::new(GlobalState {
         event,
         odds,
         market_maker_seckey,
         market_maker_pubkey,
+        bitcoind,
         registrations: HashMap::new(),
         stage: Stage::IntentRegistry,
     }));