refactor: Rename wallet_esplora to...

...`wallet_esplora_blocking`

example-crates/wallet_esplora_blocking/src/main.rs

@@ -0,0 +1,99 @@
+const DB_MAGIC: &str = "bdk_wallet_esplora_example";
+const SEND_AMOUNT: u64 = 1000;
+const STOP_GAP: usize = 5;
+const PARALLEL_REQUESTS: usize = 1;
+
+use std::{io::Write, str::FromStr};
+
+use bdk::{
+    bitcoin::{Address, Network},
+    chain::keychain::WalletUpdate,
+    wallet::AddressIndex,
+    SignOptions, Wallet,
+};
+use bdk_esplora::{esplora_client, EsploraExt};
+use bdk_file_store::Store;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let db_path = std::env::temp_dir().join("bdk-esplora-example");
+    let db = Store::<bdk::wallet::ChangeSet>::new_from_path(DB_MAGIC.as_bytes(), db_path)?;
+    let external_descriptor = "wpkh(tprv8ZgxMBicQKsPdy6LMhUtFHAgpocR8GC6QmwMSFpZs7h6Eziw3SpThFfczTDh5rW2krkqffa11UpX3XkeTTB2FvzZKWXqPY54Y6Rq4AQ5R8L/84'/0'/0'/0/*)";
+    let internal_descriptor = "wpkh(tprv8ZgxMBicQKsPdy6LMhUtFHAgpocR8GC6QmwMSFpZs7h6Eziw3SpThFfczTDh5rW2krkqffa11UpX3XkeTTB2FvzZKWXqPY54Y6Rq4AQ5R8L/84'/0'/0'/1/*)";
+
+    let mut wallet = Wallet::new(
+        external_descriptor,
+        Some(internal_descriptor),
+        db,
+        Network::Testnet,
+    )?;
+
+    let address = wallet.get_address(AddressIndex::New);
+    println!("Generated Address: {}", address);
+
+    let balance = wallet.get_balance();
+    println!("Wallet balance before syncing: {} sats", balance.total());
+
+    print!("Syncing...");
+    let client =
+        esplora_client::Builder::new("https://blockstream.info/testnet/api").build_blocking()?;
+
+    let prev_tip = wallet.latest_checkpoint();
+    let keychain_spks = wallet
+        .spks_of_all_keychains()
+        .into_iter()
+        .map(|(k, k_spks)| {
+            let mut once = Some(());
+            let mut stdout = std::io::stdout();
+            let k_spks = k_spks
+                .inspect(move |(spk_i, _)| match once.take() {
+                    Some(_) => print!("\nScanning keychain [{:?}]", k),
+                    None => print!(" {:<3}", spk_i),
+                })
+                .inspect(move |_| stdout.flush().expect("must flush"));
+            (k, k_spks)
+        })
+        .collect();
+
+    let (update_graph, last_active_indices) =
+        client.update_tx_graph(keychain_spks, None, None, STOP_GAP, PARALLEL_REQUESTS)?;
+    let missing_heights = wallet.tx_graph().missing_heights(wallet.local_chain());
+    let chain_update = client.update_local_chain(prev_tip, missing_heights)?;
+    let update = WalletUpdate {
+        last_active_indices,
+        graph: update_graph,
+        ..WalletUpdate::new(chain_update)
+    };
+
+    wallet.apply_update(update)?;
+    wallet.commit()?;
+    println!();
+
+    let balance = wallet.get_balance();
+    println!("Wallet balance after syncing: {} sats", balance.total());
+
+    if balance.total() < SEND_AMOUNT {
+        println!(
+            "Please send at least {} sats to the receiving address",
+            SEND_AMOUNT
+        );
+        std::process::exit(0);
+    }
+
+    let faucet_address = Address::from_str("mkHS9ne12qx9pS9VojpwU5xtRd4T7X7ZUt")?
+        .require_network(Network::Testnet)?;
+
+    let mut tx_builder = wallet.build_tx();
+    tx_builder
+        .add_recipient(faucet_address.script_pubkey(), SEND_AMOUNT)
+        .enable_rbf();
+
+    let (mut psbt, _) = tx_builder.finish()?;
+    let finalized = wallet.sign(&mut psbt, SignOptions::default())?;
+    assert!(finalized);
+
+    let tx = psbt.extract_tx();
+    client.broadcast(&tx)?;
+    println!("Tx broadcasted! Txid: {}", tx.txid());
+
+    Ok(())
+}