_ Git - ldk-sample/blob - src/bitcoind_client.rs

   1 use crate::convert::{BlockchainInfo, FeeResponse, FundedTx, NewAddress, RawTx, SignedTx};
   2 use base64;
   3 use bitcoin::blockdata::block::Block;
   4 use bitcoin::blockdata::transaction::Transaction;
   5 use bitcoin::consensus::encode;
   6 use bitcoin::hash_types::BlockHash;
   7 use bitcoin::util::address::Address;
   8 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
   9 use lightning_block_sync::http::HttpEndpoint;
  10 use lightning_block_sync::rpc::RpcClient;
  11 use lightning_block_sync::{AsyncBlockSourceResult, BlockHeaderData, BlockSource};
  12 use serde_json;
  13 use std::collections::HashMap;
  14 use std::str::FromStr;
  15 use std::sync::atomic::{AtomicU32, Ordering};
  16 use std::sync::Arc;
  17 use std::time::Duration;
  18 use tokio::sync::Mutex;
  19
  20 pub struct BitcoindClient {
  21         bitcoind_rpc_client: Arc<Mutex<RpcClient>>,
  22         host: String,
  23         port: u16,
  24         rpc_user: String,
  25         rpc_password: String,
  26         fees: Arc<HashMap<Target, AtomicU32>>,
  27 }
  28
  29 #[derive(Clone, Eq, Hash, PartialEq)]
  30 pub enum Target {
  31         Background,
  32         Normal,
  33         HighPriority,
  34 }
  35
  36 impl BlockSource for &BitcoindClient {
  37         fn get_header<'a>(
  38                 &'a mut self, header_hash: &'a BlockHash, height_hint: Option<u32>,
  39         ) -> AsyncBlockSourceResult<'a, BlockHeaderData> {
  40                 Box::pin(async move {
  41                         let mut rpc = self.bitcoind_rpc_client.lock().await;
  42                         rpc.get_header(header_hash, height_hint).await
  43                 })
  44         }
  45
  46         fn get_block<'a>(
  47                 &'a mut self, header_hash: &'a BlockHash,
  48         ) -> AsyncBlockSourceResult<'a, Block> {
  49                 Box::pin(async move {
  50                         let mut rpc = self.bitcoind_rpc_client.lock().await;
  51                         rpc.get_block(header_hash).await
  52                 })
  53         }
  54
  55         fn get_best_block<'a>(&'a mut self) -> AsyncBlockSourceResult<(BlockHash, Option<u32>)> {
  56                 Box::pin(async move {
  57                         let mut rpc = self.bitcoind_rpc_client.lock().await;
  58                         rpc.get_best_block().await
  59                 })
  60         }
  61 }
  62
  63 impl BitcoindClient {
  64         pub async fn new(
  65                 host: String, port: u16, rpc_user: String, rpc_password: String,
  66         ) -> std::io::Result<Self> {
  67                 let http_endpoint = HttpEndpoint::for_host(host.clone()).with_port(port);
  68                 let rpc_credentials =
  69                         base64::encode(format!("{}:{}", rpc_user.clone(), rpc_password.clone()));
  70                 let mut bitcoind_rpc_client = RpcClient::new(&rpc_credentials, http_endpoint)?;
  71                 let _dummy = bitcoind_rpc_client.call_method::<BlockchainInfo>("getblockchaininfo", &vec![]).await
  72                         .map_err(|_| std::io::Error::new(std::io::ErrorKind::PermissionDenied,
  73                                 "Failed to make initial call to bitcoind - please check your RPC user/password and access settings"))?;
  74                 let mut fees: HashMap<Target, AtomicU32> = HashMap::new();
  75                 fees.insert(Target::Background, AtomicU32::new(253));
  76                 fees.insert(Target::Normal, AtomicU32::new(2000));
  77                 fees.insert(Target::HighPriority, AtomicU32::new(5000));
  78                 let client = Self {
  79                         bitcoind_rpc_client: Arc::new(Mutex::new(bitcoind_rpc_client)),
  80                         host,
  81                         port,
  82                         rpc_user,
  83                         rpc_password,
  84                         fees: Arc::new(fees),
  85                 };
  86                 BitcoindClient::poll_for_fee_estimates(
  87                         client.fees.clone(),
  88                         client.bitcoind_rpc_client.clone(),
  89                 )
  90                 .await;
  91                 Ok(client)
  92         }
  93
  94         async fn poll_for_fee_estimates(
  95                 fees: Arc<HashMap<Target, AtomicU32>>, rpc_client: Arc<Mutex<RpcClient>>,
  96         ) {
  97                 tokio::spawn(async move {
  98                         loop {
  99                                 let background_estimate = {
 100                                         let mut rpc = rpc_client.lock().await;
 101                                         let background_conf_target = serde_json::json!(144);
 102                                         let background_estimate_mode = serde_json::json!("ECONOMICAL");
 103                                         let resp = rpc
 104                                                 .call_method::<FeeResponse>(
 105                                                         "estimatesmartfee",
 106                                                         &vec![background_conf_target, background_estimate_mode],
 107                                                 )
 108                                                 .await
 109                                                 .unwrap();
 110                                         match resp.feerate {
 111                                                 Some(fee) => fee,
 112                                                 None => 253,
 113                                         }
 114                                 };
 115                                 // if background_estimate.
 116
 117                                 let normal_estimate = {
 118                                         let mut rpc = rpc_client.lock().await;
 119                                         let normal_conf_target = serde_json::json!(18);
 120                                         let normal_estimate_mode = serde_json::json!("ECONOMICAL");
 121                                         let resp = rpc
 122                                                 .call_method::<FeeResponse>(
 123                                                         "estimatesmartfee",
 124                                                         &vec![normal_conf_target, normal_estimate_mode],
 125                                                 )
 126                                                 .await
 127                                                 .unwrap();
 128                                         match resp.feerate {
 129                                                 Some(fee) => fee,
 130                                                 None => 2000,
 131                                         }
 132                                 };
 133
 134                                 let high_prio_estimate = {
 135                                         let mut rpc = rpc_client.lock().await;
 136                                         let high_prio_conf_target = serde_json::json!(6);
 137                                         let high_prio_estimate_mode = serde_json::json!("CONSERVATIVE");
 138                                         let resp = rpc
 139                                                 .call_method::<FeeResponse>(
 140                                                         "estimatesmartfee",
 141                                                         &vec![high_prio_conf_target, high_prio_estimate_mode],
 142                                                 )
 143                                                 .await
 144                                                 .unwrap();
 145
 146                                         match resp.feerate {
 147                                                 Some(fee) => fee,
 148                                                 None => 5000,
 149                                         }
 150                                 };
 151
 152                                 fees.get(&Target::Background)
 153                                         .unwrap()
 154                                         .store(background_estimate, Ordering::Release);
 155                                 fees.get(&Target::Normal).unwrap().store(normal_estimate, Ordering::Release);
 156                                 fees.get(&Target::HighPriority)
 157                                         .unwrap()
 158                                         .store(high_prio_estimate, Ordering::Release);
 159                                 tokio::time::sleep(Duration::from_secs(60)).await;
 160                         }
 161                 });
 162         }
 163
 164         pub fn get_new_rpc_client(&self) -> std::io::Result<RpcClient> {
 165                 let http_endpoint = HttpEndpoint::for_host(self.host.clone()).with_port(self.port);
 166                 let rpc_credentials =
 167                         base64::encode(format!("{}:{}", self.rpc_user.clone(), self.rpc_password.clone()));
 168                 RpcClient::new(&rpc_credentials, http_endpoint)
 169         }
 170
 171         pub async fn create_raw_transaction(&self, outputs: Vec<HashMap<String, f64>>) -> RawTx {
 172                 let mut rpc = self.bitcoind_rpc_client.lock().await;
 173
 174                 let outputs_json = serde_json::json!(outputs);
 175                 rpc.call_method::<RawTx>("createrawtransaction", &vec![serde_json::json!([]), outputs_json])
 176                         .await
 177                         .unwrap()
 178         }
 179
 180         pub async fn fund_raw_transaction(&self, raw_tx: RawTx) -> FundedTx {
 181                 let mut rpc = self.bitcoind_rpc_client.lock().await;
 182
 183                 let raw_tx_json = serde_json::json!(raw_tx.0);
 184                 rpc.call_method("fundrawtransaction", &[raw_tx_json]).await.unwrap()
 185         }
 186
 187         pub async fn send_raw_transaction(&self, raw_tx: RawTx) {
 188                 let mut rpc = self.bitcoind_rpc_client.lock().await;
 189
 190                 let raw_tx_json = serde_json::json!(raw_tx.0);
 191                 rpc.call_method::<RawTx>("sendrawtransaction", &[raw_tx_json]).await.unwrap();
 192         }
 193
 194         pub async fn sign_raw_transaction_with_wallet(&self, tx_hex: String) -> SignedTx {
 195                 let mut rpc = self.bitcoind_rpc_client.lock().await;
 196
 197                 let tx_hex_json = serde_json::json!(tx_hex);
 198                 rpc.call_method("signrawtransactionwithwallet", &vec![tx_hex_json]).await.unwrap()
 199         }
 200
 201         pub async fn get_new_address(&self) -> Address {
 202                 let mut rpc = self.bitcoind_rpc_client.lock().await;
 203
 204                 let addr_args = vec![serde_json::json!("LDK output address")];
 205                 let addr = rpc.call_method::<NewAddress>("getnewaddress", &addr_args).await.unwrap();
 206                 Address::from_str(addr.0.as_str()).unwrap()
 207         }
 208
 209         pub async fn get_blockchain_info(&self) -> BlockchainInfo {
 210                 let mut rpc = self.bitcoind_rpc_client.lock().await;
 211                 rpc.call_method::<BlockchainInfo>("getblockchaininfo", &vec![]).await.unwrap()
 212         }
 213 }
 214
 215 impl FeeEstimator for BitcoindClient {
 216         fn get_est_sat_per_1000_weight(&self, confirmation_target: ConfirmationTarget) -> u32 {
 217                 match confirmation_target {
 218                         ConfirmationTarget::Background => {
 219                                 self.fees.get(&Target::Background).unwrap().load(Ordering::Acquire)
 220                         }
 221                         ConfirmationTarget::Normal => {
 222                                 self.fees.get(&Target::Normal).unwrap().load(Ordering::Acquire)
 223                         }
 224                         ConfirmationTarget::HighPriority => {
 225                                 self.fees.get(&Target::HighPriority).unwrap().load(Ordering::Acquire)
 226                         }
 227                 }
 228         }
 229 }
 230
 231 impl BroadcasterInterface for BitcoindClient {
 232         fn broadcast_transaction(&self, tx: &Transaction) {
 233                 let bitcoind_rpc_client = self.bitcoind_rpc_client.clone();
 234                 let tx_serialized = serde_json::json!(encode::serialize_hex(tx));
 235                 tokio::spawn(async move {
 236                         let mut rpc = bitcoind_rpc_client.lock().await;
 237                         rpc.call_method::<RawTx>("sendrawtransaction", &vec![tx_serialized]).await.unwrap();
 238                 });
 239         }
 240 }