rust: add keychain docs

src/SUMMARY.md

@@ -20,6 +20,7 @@
     * [Keychain](./rust-sdk/keychain/01-index.md)
         * [Change password](./rust-sdk/keychain/02-change-password.md)
         * [Secrets](./rust-sdk/keychain/03-secrets.md)
+        * [Wipe](./rust-sdk/keychain/04-wipe.md)
 
 - [JavaScript SDK](./js-sdk/getting-started.md)
     * [Installation](./js-sdk/installation.md)

src/rust-sdk/keychain/01-index.md

@@ -1 +1,11 @@
-# Keychain
+# Keychain
+
+This section will show you how to manage the `keychain`.
+
+## Definition
+
+Keychain means a `seed` plus an optional list of `passphrases`.
+
+## Store
+
+The `keychian` it's stored in a file called `keechain`. It's encrypted using AES-256 in CBC mode and XChaCha20Poly1305: `XChaCha20Poly1305(AES256CBC(keychain))`.

src/rust-sdk/keychain/02-change-password.md

@@ -1 +1,16 @@
 # Change password
+
+```rust,no_run
+# use smartvaults_sdk::prelude::*;
+#
+# #[tokio::main]
+# async fn main() {
+let client = ...; // The client that you before constructed
+
+client.change_password(
+    || Ok(String::from("current-password")), // Current password
+    || Ok(String::from("new-password")), // New password
+    || Ok(String::from("new-password")), // Confirmation of new password
+)?;
+# }
+```

src/rust-sdk/keychain/03-secrets.md

@@ -1 +1,25 @@
 # Secrets
+
+```rust,no_run
+# use smartvaults_sdk::prelude::*;
+#
+# #[tokio::main]
+# async fn main() {
+let client = ...; // The client that you before constructed
+
+let secp = Secp256k1::new();
+
+let network: Network = client.network();
+let keychain: Keychain = client.keychain();
+let secrets: Secrets = keychain.secrets(network, &secp)?;
+
+println!("Entropy: {}", secrets.entropy);
+println!("Mnemonic: {}", secrets.mnemonic);
+if let Some(passphrase) = &secrets.passphrase {
+    println!("Passphrase: {}", passphrase);
+}
+println!("Seed (hex): {}", secrets.seed_hex);
+println!("Root Key (BIP32): {}", secrets.root_key);
+println!("Fingerprint: {}", secrets.fingerprint);
+# }
+```

src/rust-sdk/keychain/04-wipe.md

@@ -0,0 +1,15 @@
+# Wipe
+
+Delete the `keychain`
+
+```rust,no_run
+# use smartvaults_sdk::prelude::*;
+#
+# #[tokio::main]
+# async fn main() {
+let client = ...; // The client that you before constructed
+
+// Delete the keychain
+client.wipe("your-password")?;
+# }
+```