Docs: add just example for using bdk-cli with bitcoind regtest node

Justfile

@@ -95,3 +95,8 @@ send n address wallet=default_wallet:
 [group('rpc')]
 descriptors private wallet=default_wallet:
     bitcoin-cli -datadir={{default_datadir}} -regtest -rpcwallet={{wallet}} -rpcuser={{rpc_user}} -rpcpassword={{rpc_password}} listdescriptors {{private}}
+
+# run any bitcoin-cli rpc command
+[group('rpc')]
+rpc command wallet=default_wallet:
+    bitcoin-cli -datadir={{default_datadir}} -regtest -rpcwallet={{wallet}} -rpcuser={{rpc_user}} -rpcpassword={{rpc_password}} {{command}}

README.md

@@ -122,11 +122,78 @@ The below are some of the commands included:
 
 ``` shell
 just # list all available recipes
-just start # start regtest bitcoind in default dir
 just test # test the project
 just build # build the project
 ```
 
+### Using `Justfile` to run `bitcoind` as a Client
+
+If you are testing `bdk-cli` in regtest mode and wants to use your `bitcoind` node as a blockchain client, the `Justfile` can help you to quickly do so. Below are the steps to use your `bitcoind` node in *regtest* mode with `bdk-cli`:
+
+Note: You can modify the `Justfile` to reflect your nodes' configuration values. These values are the default values used in `bdk-cli`
+ > * default wallet: The set default wallet name is `regtest_default_wallet`
+ > * default data directory: The set default data directory is `~/.bdk-bitcoin`
+ > * RPC username: The set RPC username is `user`
+ > * RPC password: The set RPC password is `password`
+
+#### Steps
+
+1. Start bitcoind
+   ```shell
+   just start
+   ```
+
+2. Create or load a bitcoind wallet with default wallet name
+
+   ```shell
+   just create
+   ```
+   or
+   ```shell 
+   just load
+   ```
+
+3. Generate a bitcoind wallet address to send regtest bitcoins to.
+
+   ```shell
+   just address
+   ```
+
+4. Mine 101 blocks on regtest to bitcoind wallet address
+   ```shell
+   just generate 101 $(just address)
+   ```
+
+5. Check the bitcoind wallet balance
+   ```shell
+   just balance
+   ```
+
+6. Setup your `bdk-cli` wallet config and connect it to your regtest node to perform a `sync`
+   ```shell
+   export NETWORK=regtest
+   export EXT_DESCRIPTOR='wpkh(tprv8ZgxMBicQKsPdMzWj9KHvoExKJDqfZFuT5D8o9XVZ3wfyUcnPNPJKncq5df8kpDWnMxoKbGrpS44VawHG17ZSwTkdhEtVRzSYXd14vDYXKw/0/*)'
+   export INT_DESCRIPTOR='wpkh(tprv8ZgxMBicQKsPdMzWj9KHvoExKJDqfZFuT5D8o9XVZ3wfyUcnPNPJKncq5df8kpDWnMxoKbGrpS44VawHG17ZSwTkdhEtVRzSYXd14vDYXKw/1/*)'
+   export DATABASE_TYPE=sqlite
+   cargo run --features rpc -- wallet -u "127.0.0.1:18443" -c rpc -a user:password sync
+   ```
+
+7. Generate an address from your `bdk-cli` wallet and fund it with 10 bitcoins from your bitcoind node's wallet
+   ```shell
+   export address=$(cargo run --features rpc -- wallet -u "127.0.0.1:18443" -c rpc -a user:password new_address | jq '.address')
+   just send 10 $address
+   ```
+
+8. Mine 6 more blocks to the bitcoind wallet
+   ```shell
+   just generate 6 $(just address)
+   ```
+
+9. You can `sync` your `bdk-cli` wallet now and the balance should reflect the regtest bitcoin you received
+   ```shell
+   cargo run --features rpc -- wallet -u "127.0.0.1:18443" -c rpc -a user:password sync
+   cargo run --features rpc -- wallet -u "127.0.0.1:18443" -c rpc -a user:password balance
+   ```
 
 ## Minimum Supported Rust Version (MSRV)
 

src/handlers.rs

@@ -554,7 +554,7 @@ pub(crate) async fn handle_online_wallet_subcommand(
                         mut warning_subscriber,
                         update_subscriber: _,
                         node,
-                    } = client;
+                    } = *client;
 
                     let subscriber = tracing_subscriber::FmtSubscriber::new();
                     tracing::subscriber::set_global_default(subscriber)

src/utils.rs

@@ -140,7 +140,7 @@ pub(crate) enum BlockchainClient {
     },
 
     #[cfg(feature = "cbf")]
-    KyotoClient { client: LightClient },
+    KyotoClient { client: Box<LightClient> },
 }
 
 #[cfg(any(
@@ -206,7 +206,9 @@ pub(crate) fn new_blockchain_client(
                 .data_dir(&_datadir)
                 .build_with_wallet(_wallet, scan_type)?;
 
-            BlockchainClient::KyotoClient { client }
+            BlockchainClient::KyotoClient {
+                client: Box::new(client),
+            }
         }
     };
     Ok(client)
@@ -323,15 +325,15 @@ pub async fn trace_logger(
 
 // Handle Kyoto Client sync
 #[cfg(feature = "cbf")]
-pub async fn sync_kyoto_client(wallet: &mut Wallet, client: LightClient) -> Result<(), Error> {
+pub async fn sync_kyoto_client(wallet: &mut Wallet, client: Box<LightClient>) -> Result<(), Error> {
     let LightClient {
         requester,
         log_subscriber,
         info_subscriber,
         warning_subscriber,
         mut update_subscriber,
         node,
-    } = client;
+    } = *client;
 
     let subscriber = tracing_subscriber::FmtSubscriber::new();
     tracing::subscriber::set_global_default(subscriber)

tests/integration.rs

@@ -20,6 +20,7 @@ mod test {
     use std::process::Command;
 
     /// Testing errors for integration tests
+    #[allow(dead_code)]
     #[derive(Debug)]
     enum IntTestError {
         // IO error
@@ -38,11 +39,12 @@ mod test {
 
     // Helper function
     // Runs a system command with given args
+    #[allow(dead_code)]
     fn run_cmd_with_args(cmd: &str, args: &[&str]) -> Result<serde_json::Value, IntTestError> {
         let output = Command::new(cmd).args(args).output().unwrap();
         let mut value = output.stdout;
         let error = output.stderr;
-        if value.len() == 0 {
+        if value.is_empty() {
             return Err(IntTestError::CmdExec(String::from_utf8(error).unwrap()));
         }
         value.pop(); // remove `\n` at end
@@ -56,6 +58,7 @@ mod test {
 
     // Helper Function
     // Transforms a json value to string
+    #[allow(dead_code)]
     fn value_to_string(value: &Value) -> Result<String, IntTestError> {
         match value {
             Value::Bool(bool) => match bool {
@@ -72,6 +75,7 @@ mod test {
 
     // Helper Function
     // Extracts value from a given json object and key
+    #[allow(dead_code)]
     fn get_value(json: &Value, key: &str) -> Result<String, IntTestError> {
         let map = json
             .as_object()
@@ -86,6 +90,7 @@ mod test {
 
     /// The bdk-cli command struct
     /// Use it to perform all bdk-cli operations
+    #[allow(dead_code)]
     #[derive(Debug)]
     struct BdkCli {
         target: String,
@@ -108,10 +113,10 @@ mod test {
             let mut feat = "--features=".to_string();
             for item in features {
                 feat.push_str(item);
-                feat.push_str(",");
+                feat.push(',');
             }
             feat.pop(); // remove the last comma
-            let _build = Command::new("cargo").args(&["build", &feat]).output()?;
+            let _build = Command::new("cargo").args(["build", &feat]).output()?;
 
             let mut bdk_cli = Self {
                 target: "./target/debug/bdk-cli".to_string(),
@@ -159,7 +164,7 @@ mod test {
             wallet_args.push("-d");
             wallet_args.push(self.recv_desc.as_ref().unwrap());
             wallet_args.push("-c");
-            wallet_args.push(&self.chang_desc.as_ref().unwrap());
+            wallet_args.push(self.chang_desc.as_ref().unwrap());
 
             for arg in args {
                 wallet_args.push(arg);
@@ -195,6 +200,7 @@ mod test {
 
     // Run A Basic wallet operation test, with given feature
     #[cfg(test)]
+    #[allow(dead_code)]
     fn basic_wallet_ops(feature: &str) {
         // Create a temporary directory for testing env
         let mut test_dir = std::env::current_dir().unwrap();