Add command to delete saved wallet config

CHANGELOG.md

@@ -6,7 +6,7 @@ page. See [DEVELOPMENT_CYCLE.md](DEVELOPMENT_CYCLE.md) for more details.
 ## [Unreleased]
 
 - Added support for Multipath (two-paths) descriptors.
-
+- Replaced plain `wallets` with `wallets list`, and added `wallets delete <wallet_name>` for unused saved wallet configurations.
 
 ## [4.0.0]
 

README.md

@@ -328,12 +328,18 @@ cargo run --features electrum wallet -w my_wallet full_scan
 
 Note that each wallet has its own configuration, allowing multiple wallets with different configurations.
 
-#### View all saved Wallet Configs
+#### Manage saved Wallet Configs
 
 To view all saved wallet configurations:
 
 ```shell
-cargo run wallets`
+cargo run -- wallets list
+```
+
+To delete a saved wallet configuration:
+
+```shell
+cargo run -- wallets delete <wallet_name>
 ```
 
 ## Adding new features/command

src/commands.rs

@@ -16,7 +16,7 @@
 #[cfg(feature = "message_signer")]
 use crate::handlers::offline::{SignMessageCommand, VerifyMessageCommand};
 use crate::handlers::{
-    config::{ListWalletsCommand, SaveConfigCommand},
+    config::{DeleteWalletConfigCommand, ListWalletsCommand, SaveConfigCommand},
     descriptor::DescriptorCommand,
     key::{DeriveKeyCommand, GenerateKeyCommand, RestoreKeyCommand},
     offline::{
@@ -141,8 +141,12 @@ pub enum CliSubCommand {
     /// This feature is intended for development and testing purposes only.
     Descriptor(DescriptorCommand),
 
-    /// List all saved wallet configurations.
-    Wallets(ListWalletsCommand),
+    /// Saved wallet configuration operations.
+    Wallets {
+        #[command(subcommand)]
+        subcommand: WalletsSubCommand,
+    },
+
     /// Generate tab-completion scripts for your shell.
     ///
     /// The completion script is output on stdout, allowing you to redirect
@@ -208,6 +212,19 @@ pub enum CliSubCommand {
     ResolveDnsRecipient(ResolveDnsRecipientCommand),
 }
 
+/// Saved wallet configuration subcommands.
+#[derive(Debug, Subcommand, Clone, PartialEq)]
+pub enum WalletsSubCommand {
+    /// List saved wallet configurations.
+    List(ListWalletsCommand),
+
+    /// Delete an unused saved wallet configuration.
+    ///
+    /// The command refuses deletion once persistent wallet data exists.
+    /// Wallet database files are never deleted.
+    Delete(DeleteWalletConfigCommand),
+}
+
 /// Wallet operation subcommands.
 #[derive(Debug, Subcommand, Clone, PartialEq)]
 pub enum WalletSubCommand {

src/config.rs

@@ -7,7 +7,7 @@
 use crate::client::ClientType;
 use crate::commands::WalletOpts;
 use crate::error::BDKCliError as Error;
-#[cfg(feature = "sqlite")]
+#[cfg(any(feature = "sqlite", feature = "redb"))]
 use crate::persister::DatabaseType;
 use bdk_wallet::bitcoin::Network;
 #[cfg(any(feature = "sqlite", feature = "redb"))]
@@ -223,8 +223,10 @@ mod tests {
             network: "testnet4".to_string(),
             ext_descriptor: EXT_DESCRIPTOR.to_string(),
             int_descriptor: Some(INT_DESCRIPTOR.to_string()),
-            #[cfg(any(feature = "sqlite", feature = "redb"))]
+            #[cfg(feature = "sqlite")]
             database_type: "sqlite".to_string(),
+            #[cfg(all(feature = "redb", not(feature = "sqlite")))]
+            database_type: "redb".to_string(),
 
             #[cfg(any(
                 feature = "electrum",
@@ -310,8 +312,10 @@ mod tests {
             network: "regtest".to_string(),
             ext_descriptor: "desc".to_string(),
             int_descriptor: None,
-            #[cfg(any(feature = "sqlite", feature = "redb"))]
+            #[cfg(feature = "sqlite")]
             database_type: "sqlite".to_string(),
+            #[cfg(all(feature = "redb", not(feature = "sqlite")))]
+            database_type: "redb".to_string(),
             #[cfg(any(
                 feature = "electrum",
                 feature = "esplora",

src/handlers/config.rs

@@ -7,15 +7,18 @@ use std::collections::HashMap;
     feature = "cbf"
 ))]
 use crate::client::ClientType;
-use crate::commands::WalletOpts;
+use crate::commands::{WalletOpts, WalletsSubCommand};
 use crate::config::{WalletConfig, WalletConfigInner};
 use crate::error::BDKCliError as Error;
 use crate::handlers::Init;
 use crate::handlers::{AppCommand, AppContext};
 #[cfg(any(feature = "sqlite", feature = "redb"))]
 use crate::persister::DatabaseType;
 use crate::utils::descriptors::validate_descriptor_pair;
+use crate::utils::output::FormatOutput;
 use crate::utils::types::{StatusResult, WalletsListResult};
+#[cfg(feature = "redb")]
+use bdk_redb::redb::TableHandle;
 use bdk_wallet::bitcoin::Network;
 use clap::Args;
 
@@ -175,3 +178,209 @@ impl AppCommand<AppContext<Init>> for ListWalletsCommand {
         Ok(WalletsListResult(config.wallets))
     }
 }
+
+fn wallet_data_path_exists(path: &std::path::Path) -> Result<bool, Error> {
+    match std::fs::symlink_metadata(path) {
+        Ok(_) => Ok(true),
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound => Ok(false),
+        Err(error) => Err(Error::Generic(format!(
+            "Failed to inspect wallet data at {path:?}: {error}"
+        ))),
+    }
+}
+
+#[cfg(any(feature = "sqlite", feature = "redb"))]
+fn wallet_data_exists(
+    datadir: &std::path::Path,
+    wallet_name: &str,
+    database_type: &str,
+) -> Result<bool, Error> {
+    // Validate the persisted configuration before inspecting any data. In particular, an
+    // unknown database type must never turn a delete into a silent success.
+    match database_type {
+        // Both markers are valid persisted formats even when this binary only
+        // supports one of them; the opposite backend is checked conservatively below.
+        "sqlite" | "redb" => {}
+        _ => {
+            return Err(Error::Generic(format!(
+                "Unsupported database type: {database_type}"
+            )));
+        }
+    }
+
+    // A configuration can be changed to another backend without moving the original data, so
+    // inspect every persistence backend marker rather than only the configured backend.
+    let sqlite_path = datadir.join(wallet_name).join("wallet.sqlite");
+    let sqlite_data_exists = wallet_data_path_exists(&sqlite_path)?;
+
+    #[cfg(feature = "redb")]
+    let redb_data_exists = {
+        // Redb is shared by wallets, so only block deletion when this wallet has its sentinel
+        // table.
+        redb_wallet_data_exists(datadir, wallet_name)?
+    };
+
+    #[cfg(not(feature = "redb"))]
+    let redb_data_exists = {
+        // Without Redb support, conservatively treat the shared marker as data because this
+        // build cannot inspect its wallet-specific tables.
+        wallet_data_path_exists(&datadir.join("wallet.redb"))?
+    };
+
+    Ok(sqlite_data_exists || redb_data_exists)
+}
+
+#[cfg(feature = "redb")]
+fn redb_wallet_data_exists(datadir: &std::path::Path, wallet_name: &str) -> Result<bool, Error> {
+    let db_path = datadir.join("wallet.redb");
+    if !wallet_data_path_exists(&db_path)? {
+        return Ok(false);
+    }
+
+    let database = bdk_redb::redb::Database::open(&db_path).map_err(|error| {
+        Error::Generic(format!(
+            "Failed to open Redb database at {db_path:?}: {error}"
+        ))
+    })?;
+
+    let read_transactions = database
+        .begin_read()
+        .map_err(|error| Error::Generic(error.to_string()))?;
+
+    let mut tables = read_transactions.list_tables().map_err(|error| {
+        Error::Generic(format!(
+            "Failed to list tables in Redb database at {db_path:?}: {error}"
+        ))
+    })?;
+
+    // bdk_redb creates this per-wallet table in the first committed table batch for a
+    // persisted wallet, so it is the sentinel for an initialized wallet store.
+    let keychain_table_name = format!("{wallet_name}_keychain");
+
+    Ok(tables.any(|table| table.name() == keychain_table_name.as_str()))
+}
+
+#[cfg(not(any(feature = "sqlite", feature = "redb")))]
+fn wallet_data_exists(datadir: &std::path::Path, wallet_name: &str) -> Result<bool, Error> {
+    // The typed config intentionally omits `database_type` in this build, so inspect the raw
+    // wallet entry as well. A config carrying that field may have been created by a build with a
+    // database backend and must not be silently deleted just because its marker is absent.
+    let config_path = datadir.join("config.toml");
+    let config_content = std::fs::read_to_string(&config_path)
+        .map_err(|error| Error::Generic(format!("Failed to read config file: {error}")))?;
+    let raw_config: toml::Table = toml::from_str(&config_content)
+        .map_err(|error| Error::Generic(format!("Failed to parse config file: {error}")))?;
+    let database_type_present = raw_config
+        .get("wallets")
+        .and_then(toml::Value::as_table)
+        .and_then(|wallets| wallets.get(wallet_name))
+        .and_then(toml::Value::as_table)
+        .is_some_and(|wallet| wallet.contains_key("database_type"));
+
+    Ok(database_type_present
+        || wallet_data_path_exists(&datadir.join(wallet_name).join("wallet.sqlite"))?
+        || wallet_data_path_exists(&datadir.join("wallet.redb"))?)
+}
+
+fn remove_wallet_from_config_file(
+    datadir: &std::path::Path,
+    wallet_name: &str,
+) -> Result<(), Error> {
+    let config_path = datadir.join("config.toml");
+    let config_content = std::fs::read_to_string(&config_path)
+        .map_err(|error| Error::Generic(format!("Failed to read config file: {error}")))?;
+    let mut raw_config: toml::Table = toml::from_str(&config_content)
+        .map_err(|error| Error::Generic(format!("Failed to parse config file: {error}")))?;
+    let wallets = raw_config
+        .get_mut("wallets")
+        .and_then(toml::Value::as_table_mut)
+        .ok_or_else(|| Error::Generic("Config does not contain a wallets table".into()))?;
+
+    if wallets.remove(wallet_name).is_none() {
+        return Err(Error::Generic(format!(
+            "Wallet '{wallet_name}' not found in config"
+        )));
+    }
+
+    let updated_config = toml::to_string_pretty(&raw_config)
+        .map_err(|error| Error::Generic(format!("Failed to serialize config: {error}")))?;
+    std::fs::write(&config_path, updated_config)
+        .map_err(|error| Error::Generic(format!("Failed to write config file: {error}")))
+}
+
+#[derive(Args, Debug, Clone, PartialEq)]
+pub struct DeleteWalletConfigCommand {
+    /// Name of the saved wallet configuration to delete.
+    #[arg(value_name = "WALLET_NAME")]
+    pub(crate) wallet_name: String,
+}
+
+impl AppCommand<AppContext<Init>> for DeleteWalletConfigCommand {
+    type Output = StatusResult;
+
+    fn execute(&self, ctx: &mut AppContext<Init>) -> Result<Self::Output, Error> {
+        let config = match WalletConfig::load(&ctx.datadir)? {
+            Some(config) => config,
+            None => return Err(Error::Generic("No wallets configured yet.".into())),
+        };
+
+        #[cfg(any(feature = "sqlite", feature = "redb"))]
+        let data_exists = {
+            let wallet_config = config.wallets.get(&self.wallet_name).ok_or_else(|| {
+                Error::Generic(format!("Wallet '{}' not found in config", self.wallet_name))
+            })?;
+
+            wallet_data_exists(
+                &ctx.datadir,
+                &self.wallet_name,
+                &wallet_config.database_type,
+            )?
+        };
+
+        #[cfg(not(any(feature = "sqlite", feature = "redb")))]
+        let data_exists = {
+            if !config.wallets.contains_key(&self.wallet_name) {
+                return Err(Error::Generic(format!(
+                    "Wallet '{}' not found in config",
+                    self.wallet_name
+                )));
+            }
+
+            wallet_data_exists(&ctx.datadir, &self.wallet_name)?
+        };
+
+        if data_exists {
+            return Err(Error::Generic(format!(
+                "Wallet data exists for configuration '{}'; the saved configuration was not deleted",
+                self.wallet_name
+            )));
+        }
+
+        if config.wallets.len() == 1 {
+            let config_path = ctx.datadir.join("config.toml");
+            std::fs::remove_file(&config_path).map_err(|error| {
+                Error::Generic(format!(
+                    "Failed to remove config at {config_path:?}: {error}"
+                ))
+            })?;
+        } else {
+            remove_wallet_from_config_file(&ctx.datadir, &self.wallet_name)?;
+        }
+
+        Ok(StatusResult {
+            message: format!(
+                "Wallet configuration '{}' deleted successfully",
+                self.wallet_name
+            ),
+        })
+    }
+}
+
+impl WalletsSubCommand {
+    pub fn execute(&self, ctx: &mut AppContext<Init>) -> Result<(), Error> {
+        match self {
+            Self::List(command) => command.execute(ctx)?.write_out(std::io::stdout()),
+            Self::Delete(command) => command.execute(ctx)?.write_out(std::io::stdout()),
+        }
+    }
+}

src/main.rs

@@ -129,10 +129,10 @@ async fn run(cli_opts: CliOpts) -> Result<(), Error> {
             cmd.execute(&mut ctx)?.write_out(std::io::stdout())?;
         }
 
-        CliSubCommand::Wallets(cmd) => {
+        CliSubCommand::Wallets { subcommand } => {
             let mut ctx = AppContext::new(cli_opts.network, home_dir);
 
-            cmd.execute(&mut ctx)?.write_out(std::io::stdout())?;
+            subcommand.execute(&mut ctx)?;
         }
 
         #[cfg(feature = "repl")]