primitives: add vec conversion functions

wallet: wire up account storage

.github/workflows/nym-release-publish.yml

@@ -0,0 +1,43 @@
+name: Publish Nym binaries
+on:
+  release:
+    types: [created]
+
+jobs:
+  publish-nym:
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: [ubuntu-latest]
+
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Check the release tag starts with `nym-binaries-`
+        if: startsWith(github.ref, 'refs/tags/nym-binaries-') == false
+        uses: actions/github-script@v3
+        with:
+          script: |
+            core.setFailed('Release tag did not start with nym-binaries-...')
+
+      - name: Install Rust stable
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+
+      - name: Build all binaries
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --workspace --release
+
+      - name: Upload to release based on tag name
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            target/release/nym-client
+            target/release/nym-gateway
+            target/release/nym-mixnode
+            target/release/nym-socks5-client
+            target/release/nym-validator-api

Cargo.lock

@@ -3683,6 +3683,15 @@ dependencies = [
  "uint",
 ]
 
+[[package]]
+name = "primitives"
+version = "0.1.0"
+dependencies = [
+ "cosmrs",
+ "cosmwasm-std",
+ "thiserror",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "1.1.3"
@@ -5999,6 +6008,7 @@ dependencies = [
  "log",
  "mixnet-contract-common",
  "network-defaults",
+ "primitives",
  "prost",
  "reqwest",
  "serde",

Cargo.toml

@@ -44,6 +44,7 @@ members = [
     "common/nymsphinx/params",
     "common/nymsphinx/types",
     "common/pemstore",
+    "common/primitives",
     "common/socks5/proxy-helpers",
     "common/socks5/requests",
     "common/topology",

common/client-libs/validator-client/Cargo.toml

@@ -21,6 +21,7 @@ url = { version = "2.2", features = ["serde"] }
 
 coconut-interface = { path = "../../coconut-interface" }
 network-defaults = { path = "../../network-defaults" }
+primitives = { path = "../../primitives" }
 validator-api-requests = { path = "../../../validator-api/validator-api-requests" }
 
 # required for nymd-client

common/client-libs/validator-client/src/nymd/cosmwasm_client/signing_client.rs

@@ -369,14 +369,14 @@ pub trait SigningCosmWasmClient: CosmWasmClient {
         &self,
         sender_address: &AccountId,
         recipient_address: &AccountId,
-        amount: Vec<Coin>,
+        amount: Vec<primitives::Coin>,
         fee: Fee,
         memo: impl Into<String> + Send + 'static,
     ) -> Result<broadcast::tx_commit::Response, NymdError> {
         let send_msg = MsgSend {
             from_address: sender_address.clone(),
             to_address: recipient_address.clone(),
-            amount,
+            amount: primitives::coin::try_into(amount)?,
         }
         .to_any()
         .map_err(|_| NymdError::SerializationError("MsgSend".to_owned()))?;

common/client-libs/validator-client/src/nymd/error.rs

@@ -108,6 +108,9 @@ pub enum NymdError {
 
     #[error("Abci query failed with code {0} - {1}")]
     AbciError(u32, abci::Log),
+
+    #[error("Failed to handle primitives")]
+    PrimitivesError(#[from] primitives::PrimitivesError)
 }
 
 impl NymdError {

common/client-libs/validator-client/src/nymd/mod.rs

@@ -606,7 +606,7 @@ impl<C> NymdClient<C> {
     pub async fn send(
         &self,
         recipient: &AccountId,
-        amount: Vec<CosmosCoin>,
+        amount: Vec<primitives::Coin>,
         memo: impl Into<String> + Send + 'static,
     ) -> Result<broadcast::tx_commit::Response, NymdError>
     where

common/primitives/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "primitives"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+cosmrs = { version = "0.4.1", features = ["rpc", "bip32", "cosmwasm"] }
+cosmwasm-std = "1.0.0-beta3"
+thiserror = "1.0"

common/primitives/src/coin.rs

@@ -0,0 +1,100 @@
+// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+use crate::error::PrimitivesError;
+use core::fmt;
+use cosmwasm_std::Uint128;
+use std::str::FromStr;
+
+/// Common Coin type for the backend.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Coin {
+    pub amount: Uint128,
+    pub denom: String,
+}
+
+impl Coin {
+    pub fn new(amount: u128, denom: impl Into<String>) -> Coin {
+        Coin {
+            amount: Uint128::new(amount),
+            denom: denom.into(),
+        }
+    }
+}
+
+impl fmt::Display for Coin {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}{}", self.amount, self.denom)
+    }
+}
+
+impl TryFrom<cosmrs::Coin> for Coin {
+    type Error = PrimitivesError;
+
+    fn try_from(cosmos_coin: cosmrs::Coin) -> Result<Self, Self::Error> {
+        Ok(Self {
+            amount: cosmos_coin.amount.to_string().as_str().try_into()?,
+            denom: cosmos_coin.denom.to_string(),
+        })
+    }
+}
+
+impl TryFrom<Coin> for cosmrs::Coin {
+    type Error = PrimitivesError;
+
+    fn try_from(coin: Coin) -> Result<Self, Self::Error> {
+        Ok(Self {
+            denom: cosmrs::Denom::from_str(&coin.denom)?,
+            amount: cosmrs::Decimal::from_str(&coin.amount.to_string())?,
+        })
+    }
+}
+
+
+pub fn try_into(coins: Vec<Coin>) -> Result<Vec<cosmrs::Coin>, PrimitivesError> {
+    coins.into_iter().map(TryInto::try_into).collect::<Result<Vec<_>, _>>()
+}
+
+pub fn into(coins: Vec<Coin>) -> Vec<cosmwasm_std::Coin> {
+    coins.into_iter().map(Into::into).collect()
+}
+
+impl From<cosmwasm_std::Coin> for Coin {
+    fn from(cosmwasm_coin: cosmwasm_std::Coin) -> Self {
+        Self {
+            amount: cosmwasm_coin.amount,
+            denom: cosmwasm_coin.denom,
+        }
+    }
+}
+
+impl From<Coin> for cosmwasm_std::Coin {
+    fn from(coin: Coin) -> Self {
+        Self {
+            amount: coin.amount,
+            denom: coin.denom,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn convert_to_and_from_cosmwasm_coin() {
+        let coin = Coin::new(42, "ucoin");
+        let cosmwasm_coin: cosmwasm_std::Coin = coin.clone().into();
+        assert_eq!(coin, Coin::from(cosmwasm_coin));
+    }
+
+    #[test]
+    fn convert_to_and_from_cosmos_coin() {
+        let coin = Coin::new(42, "ucoin");
+        let cosmos_coin: cosmrs::Coin = coin.clone().try_into().unwrap();
+        assert_eq!(coin, Coin::try_from(cosmos_coin).unwrap());
+    }
+
+    // WIP(JON): more tests
+    // Especially converting from cosmrs::Coin
+}

common/primitives/src/error.rs

@@ -0,0 +1,18 @@
+// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum PrimitivesError {
+    #[error("{source}")]
+    CosmwasmError {
+        #[from]
+        source: cosmwasm_std::StdError,
+    },
+    #[error("{source}")]
+    CosmrsError {
+        #[from]
+        source: cosmrs::ErrorReport,
+    },
+}

common/primitives/src/lib.rs

@@ -0,0 +1,8 @@
+// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+pub mod coin;
+mod error;
+
+pub use error::PrimitivesError;
+pub use coin::Coin;

nym-wallet/Cargo.lock

@@ -2843,6 +2843,7 @@ dependencies = [
  "argon2",
  "base64",
  "bip39",
+ "cfg-if",
  "coconut-interface",
  "config",
  "cosmrs",

nym-wallet/src-tauri/Cargo.toml

@@ -20,6 +20,7 @@ tauri-macros = "=1.0.0-rc.1"
 
 [dependencies]
 bip39 = "1.0"
+cfg-if = "1.0.0"
 dirs = "4.0"
 eyre = "0.6.5"
 futures = "0.3.15"

nym-wallet/src-tauri/src/error.rs

@@ -77,10 +77,18 @@ pub enum BackendError {
   NetworkNotSupported(config::defaults::all::Network),
   #[error("Could not access the local data storage directory")]
   UnknownStorageDirectory,
-  #[error("No nymd validator configured")]
-  NoNymdValidatorConfigured,
   #[error("No validator API URL configured")]
   NoValidatorApiUrlConfigured,
+  #[error("The wallet file already exists")]
+  WalletFileAlreadyExists,
+  #[error("The wallet file is not found")]
+  WalletFileNotFound,
+  #[error("Account ID not found in wallet")]
+  NoSuchIdInWallet,
+  #[error("Account ID already found in wallet")]
+  IdAlreadyExistsInWallet,
+  #[error("Adding a different password to the wallet not currently supported")]
+  WalletDifferentPasswordDetected,
 }
 
 impl Serialize for BackendError {

nym-wallet/src-tauri/src/main.rs

@@ -15,6 +15,7 @@ mod error;
 mod menu;
 mod network;
 mod operations;
+mod platform_constants;
 mod state;
 mod utils;
 // temporarily until it is actually used
@@ -37,8 +38,11 @@ fn main() {
       mixnet::account::connect_with_mnemonic,
       mixnet::account::create_new_account,
       mixnet::account::create_new_mnemonic,
+      mixnet::account::create_password,
+      mixnet::account::does_password_file_exist,
       mixnet::account::get_balance,
       mixnet::account::logout,
+      mixnet::account::sign_in_with_password,
       mixnet::account::switch_network,
       mixnet::account::update_validator_urls,
       mixnet::admin::get_contract_settings,

nym-wallet/src-tauri/src/operations/mixnet/account.rs

@@ -4,8 +4,11 @@ use crate::error::BackendError;
 use crate::network::Network;
 use crate::nymd_client;
 use crate::state::State;
+use crate::wallet_storage::{self, DEFAULT_WALLET_ACCOUNT_ID};
 
 use bip39::{Language, Mnemonic};
+use config::defaults::COSMOS_DERIVATION_PATH;
+use cosmrs::bip32::DerivationPath;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::convert::TryInto;
@@ -227,9 +230,10 @@ async fn choose_validators(
         .next()
         // We always have at least one hardcoded default validator
         .unwrap();
-      println!(
+      log::info!(
         "Using default for {network}: {}, {}",
-        default_validator.nymd_url, default_validator.api_url,
+        default_validator.nymd_url,
+        default_validator.api_url,
       );
       default_validator
     });
@@ -305,9 +309,10 @@ async fn try_connect_to_validator(
   )?;
 
   if is_validator_connection_ok(&client).await {
-    println!(
+    log::info!(
       "Connection ok for {network}: {}, {}",
-      validator.nymd_url, validator.api_url
+      validator.nymd_url,
+      validator.api_url
     );
     Ok(Some((network, validator.clone())))
   } else {
@@ -322,3 +327,45 @@ async fn is_validator_connection_ok(client: &Client<SigningNymdClient>) -> bool
     Err(_) | Ok(_) => true,
   }
 }
+
+#[tauri::command]
+pub fn does_password_file_exist() -> Result<bool, BackendError> {
+  log::info!("Checking wallet file");
+  let file = wallet_storage::wallet_login_filepath()?;
+  if file.exists() {
+    log::info!("Exists: {}", file.to_string_lossy());
+    Ok(true)
+  } else {
+    log::info!("Does not exist: {}", file.to_string_lossy());
+    Ok(false)
+  }
+}
+
+#[tauri::command]
+pub fn create_password(mnemonic: String, password: String) -> Result<(), BackendError> {
+  if does_password_file_exist()? {
+    return Err(BackendError::WalletFileAlreadyExists);
+  }
+  log::info!("Creating password");
+
+  let mnemonic = Mnemonic::from_str(&mnemonic)?;
+  let hd_path: DerivationPath = COSMOS_DERIVATION_PATH.parse().unwrap();
+  // Currently we only support a single, default, id in the wallet
+  let id = wallet_storage::WalletAccountId::new(DEFAULT_WALLET_ACCOUNT_ID.to_string());
+  let password = wallet_storage::UserPassword::new(password);
+  wallet_storage::store_wallet_login_information(mnemonic, hd_path, id, &password)
+}
+
+#[tauri::command]
+pub async fn sign_in_with_password(
+  password: String,
+  state: tauri::State<'_, Arc<RwLock<State>>>,
+) -> Result<Account, BackendError> {
+  log::info!("Signing in with password");
+
+  // Currently we only support a single, default, id in the wallet
+  let id = wallet_storage::WalletAccountId::new(DEFAULT_WALLET_ACCOUNT_ID.to_string());
+  let password = wallet_storage::UserPassword::new(password);
+  let stored_account = wallet_storage::load_existing_wallet_login_information(&id, &password)?;
+  _connect_with_mnemonic(stored_account.mnemonic().clone(), state).await
+}

nym-wallet/src-tauri/src/platform_constants.rs

@@ -0,0 +1,22 @@
+// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+// Specify filenames and other platform specific constants to respect platform conventions, or at
+// least, something popular on each respective platform.
+
+cfg_if::cfg_if! {
+    if #[cfg(target_os = "linux")] {
+        pub const STORAGE_DIR_NAME: &str = "nym-wallet";
+        pub const WALLET_INFO_FILENAME: &str = "saved-wallet.json";
+    } else if #[cfg(taret_os = "macos")] {
+        pub const STORAGE_DIR_NAME: &str = "nym-wallet";
+        pub const WALLET_INFO_FILENAME: &str = "saved-wallet.json";
+    } else if #[cfg(taret_os = "windows")] {
+        pub const STORAGE_DIR_NAME: &str = "NymWallet";
+        pub const WALLET_INFO_FILENAME: &str = "saved_wallet.json";
+    } else {
+        // This case is likely to be a unix-y system
+        pub const STORAGE_DIR_NAME: &str = "nym-wallet";
+        pub const WALLET_INFO_FILENAME: &str = "saved-wallet.json";
+    }
+}

nym-wallet/src-tauri/src/wallet_storage/account_data.rs

@@ -8,6 +8,96 @@ use std::fmt::Formatter;
 use zeroize::Zeroize;
 use zeroize::Zeroizing;
 
+use crate::error::BackendError;
+
+use super::encryption::EncryptedData;
+use super::password::WalletAccountId;
+use super::UserPassword;
+
+const CURRENT_WALLET_FILE_VERSION: u32 = 1;
+
+#[derive(Serialize, Deserialize, Debug)]
+pub(crate) struct StoredWallet {
+  version: u32,
+  accounts: Vec<EncryptedAccount>,
+}
+
+impl StoredWallet {
+  pub fn version(&self) -> u32 {
+    self.version
+  }
+
+  pub fn is_empty(&self) -> bool {
+    self.accounts.is_empty()
+  }
+
+  pub fn len(&self) -> usize {
+    self.accounts.len()
+  }
+
+  pub fn encrypted_account_by_index(&self, index: usize) -> Option<&EncryptedAccount> {
+    self.accounts.get(index)
+  }
+
+  fn encrypted_account(
+    &self,
+    id: &WalletAccountId,
+  ) -> Result<&EncryptedData<StoredAccount>, BackendError> {
+    self
+      .accounts
+      .iter()
+      .find(|account| &account.id == id)
+      .map(|account| &account.account)
+      .ok_or(BackendError::NoSuchIdInWallet)
+  }
+
+  pub fn add_encrypted_account(
+    &mut self,
+    new_account: EncryptedAccount,
+  ) -> Result<(), BackendError> {
+    if self.encrypted_account(&new_account.id).is_ok() {
+      return Err(BackendError::IdAlreadyExistsInWallet);
+    }
+    self.accounts.push(new_account);
+    Ok(())
+  }
+
+  pub fn decrypt_account(
+    &self,
+    id: &WalletAccountId,
+    password: &UserPassword,
+  ) -> Result<StoredAccount, BackendError> {
+    self.encrypted_account(id)?.decrypt_struct(password)
+  }
+
+  pub fn decrypt_all(&self, password: &UserPassword) -> Result<Vec<StoredAccount>, BackendError> {
+    self
+      .accounts
+      .iter()
+      .map(|account| account.account.decrypt_struct(password))
+      .collect::<Result<Vec<_>, _>>()
+  }
+
+  pub fn password_can_decrypt_all(&self, password: &UserPassword) -> bool {
+    self.decrypt_all(password).is_ok()
+  }
+}
+
+impl Default for StoredWallet {
+  fn default() -> Self {
+    StoredWallet {
+      version: CURRENT_WALLET_FILE_VERSION,
+      accounts: Vec::new(),
+    }
+  }
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub(crate) struct EncryptedAccount {
+  pub id: WalletAccountId,
+  pub account: EncryptedData<StoredAccount>,
+}
+
 // future-proofing
 #[derive(Serialize, Deserialize, Debug, Zeroize)]
 #[serde(untagged)]
@@ -24,6 +114,14 @@ impl StoredAccount {
   ) -> StoredAccount {
     StoredAccount::Mnemonic(MnemonicAccount { mnemonic, hd_path })
   }
+
+  // If we add accounts backed by something that is not a mnemonic, this should probably be changed
+  // to return `Option<..>`.
+  pub(crate) fn mnemonic(&self) -> &bip39::Mnemonic {
+    match self {
+      StoredAccount::Mnemonic(account) => account.mnemonic(),
+    }
+  }
 }
 
 #[derive(Serialize, Deserialize, Debug)]
@@ -33,8 +131,6 @@ pub(crate) struct MnemonicAccount {
   hd_path: DerivationPath,
 }
 
-// we only ever want to expose those getters in the test code
-#[cfg(test)]
 impl MnemonicAccount {
   pub(crate) fn mnemonic(&self) -> &bip39::Mnemonic {
     &self.mnemonic

nym-wallet/src-tauri/src/wallet_storage/encryption.rs

@@ -42,7 +42,7 @@ pub(crate) struct EncryptedData<T> {
 
 impl<T> Drop for EncryptedData<T> {
   fn drop(&mut self) {
-    self.zeroize()
+    self.zeroize();
   }
 }
 

nym-wallet/src-tauri/src/wallet_storage/mod.rs

@@ -1,19 +1,26 @@
 // Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
 // SPDX-License-Identifier: Apache-2.0
 
+pub(crate) use crate::wallet_storage::password::{UserPassword, WalletAccountId};
+
 use crate::error::BackendError;
+use crate::operations::mixnet::account::create_new_account;
+use crate::platform_constants::{STORAGE_DIR_NAME, WALLET_INFO_FILENAME};
 use crate::wallet_storage::account_data::StoredAccount;
 use crate::wallet_storage::encryption::{encrypt_struct, EncryptedData};
-use crate::wallet_storage::password::UserPassword;
 use cosmrs::bip32::DerivationPath;
+use serde::{Deserialize, Serialize};
 use std::fs::{create_dir_all, OpenOptions};
 use std::path::PathBuf;
+
+use self::account_data::{EncryptedAccount, StoredWallet};
+
 pub(crate) mod account_data;
 pub(crate) mod encryption;
+
 mod password;
 
-const STORAGE_DIR_NAME: &str = "NymWallet";
-const WALLET_INFO_FILENAME: &str = "saved_wallet.json";
+pub(crate) const DEFAULT_WALLET_ACCOUNT_ID: &str = "default";
 
 fn get_storage_directory() -> Result<PathBuf, BackendError> {
   tauri::api::path::local_data_dir()
@@ -25,52 +32,76 @@ pub(crate) fn wallet_login_filepath() -> Result<PathBuf, BackendError> {
   get_storage_directory().map(|dir| dir.join(WALLET_INFO_FILENAME))
 }
 
-pub(crate) fn load_existing_wallet_login_information(
-  password: &UserPassword,
-) -> Result<Vec<StoredAccount>, BackendError> {
+pub(crate) fn load_existing_wallet(password: &UserPassword) -> Result<StoredWallet, BackendError> {
   let store_dir = get_storage_directory()?;
   let filepath = store_dir.join(WALLET_INFO_FILENAME);
+  load_existing_wallet_at_file(filepath)
+}
 
-  load_existing_wallet_login_information_at_file(filepath, password)
+fn load_existing_wallet_at_file(filepath: PathBuf) -> Result<StoredWallet, BackendError> {
+  if !filepath.exists() {
+    return Err(BackendError::WalletFileNotFound);
+  }
+  let file = OpenOptions::new().read(true).open(filepath)?;
+  let wallet: StoredWallet = serde_json::from_reader(file)?;
+  Ok(wallet)
+}
+
+pub(crate) fn load_existing_wallet_login_information(
+  id: &WalletAccountId,
+  password: &UserPassword,
+) -> Result<StoredAccount, BackendError> {
+  let store_dir = get_storage_directory()?;
+  let filepath = store_dir.join(WALLET_INFO_FILENAME);
+  load_existing_wallet_login_information_at_file(filepath, id, password)
 }
 
 fn load_existing_wallet_login_information_at_file(
   filepath: PathBuf,
+  id: &WalletAccountId,
   password: &UserPassword,
-) -> Result<Vec<StoredAccount>, BackendError> {
-  if !filepath.exists() {
-    return Ok(Vec::new());
-  }
-  let file = OpenOptions::new().read(true).open(filepath)?;
-  let encrypted_data: EncryptedData<Vec<StoredAccount>> = serde_json::from_reader(file)?;
-  encrypted_data.decrypt_struct(password)
+) -> Result<StoredAccount, BackendError> {
+  load_existing_wallet_at_file(filepath)?.decrypt_account(id, password)
 }
 
 pub(crate) fn store_wallet_login_information(
   mnemonic: bip39::Mnemonic,
   hd_path: DerivationPath,
-  password: UserPassword,
+  id: WalletAccountId,
+  password: &UserPassword,
 ) -> Result<(), BackendError> {
   // make sure the entire directory structure exists
   let store_dir = get_storage_directory()?;
   create_dir_all(&store_dir)?;
   let filepath = store_dir.join(WALLET_INFO_FILENAME);
 
-  store_wallet_login_information_at_file(filepath, mnemonic, hd_path, &password)
+  store_wallet_login_information_at_file(filepath, mnemonic, hd_path, id, password)
 }
 
 fn store_wallet_login_information_at_file(
   filepath: PathBuf,
   mnemonic: bip39::Mnemonic,
   hd_path: DerivationPath,
+  id: WalletAccountId,
   password: &UserPassword,
 ) -> Result<(), BackendError> {
-  let mut all_accounts =
-    load_existing_wallet_login_information_at_file(filepath.clone(), password)?;
-  let new_account = StoredAccount::new_mnemonic_backed_account(mnemonic, hd_path);
-  all_accounts.push(new_account);
+  let mut stored_wallet = match load_existing_wallet_at_file(filepath.clone()) {
+    Err(BackendError::WalletFileNotFound) => StoredWallet::default(),
+    result => result?,
+  };
 
-  let encrypted = encrypt_struct(&all_accounts, password)?;
+  // Confirm that the given password also can unlock the other entries
+  if !stored_wallet.password_can_decrypt_all(password) {
+    return Err(BackendError::WalletDifferentPasswordDetected);
+  }
+
+  let new_account = StoredAccount::new_mnemonic_backed_account(mnemonic, hd_path);
+  let new_encrypted_account = EncryptedAccount {
+    id,
+    account: encrypt_struct(&new_account, password)?,
+  };
+
+  stored_wallet.add_encrypted_account(new_encrypted_account)?;
 
   let file = OpenOptions::new()
     .create(true)
@@ -78,9 +109,7 @@ fn store_wallet_login_information_at_file(
     .truncate(true)
     .open(filepath)?;
 
-  serde_json::to_writer_pretty(file, &encrypted)?;
-
-  Ok(())
+  Ok(serde_json::to_writer_pretty(file, &stored_wallet)?)
 }
 
 // this function should probably exist, but I guess we need to discuss how it should behave in the context of the UX
@@ -91,15 +120,11 @@ fn store_wallet_login_information_at_file(
 #[cfg(test)]
 mod tests {
   use super::*;
+  use crate::wallet_storage::encryption::encrypt_data;
   use config::defaults::COSMOS_DERIVATION_PATH;
   use std::path::Path;
   use tempfile::tempdir;
 
-  fn read_encrypted_blob(file: PathBuf) -> EncryptedData<Vec<StoredAccount>> {
-    let file = OpenOptions::new().read(true).open(&file).unwrap();
-    serde_json::from_reader(file).unwrap()
-  }
-
   // I'm not 100% sure how to feel about having to touch the file system at all
   #[test]
   fn storing_wallet_information() {
@@ -114,29 +139,36 @@ mod tests {
     let password = UserPassword::new("password".to_string());
     let bad_password = UserPassword::new("bad-password".to_string());
 
-    // nothing was stored on the disk, so regardless of password used, there will be no error, but
-    // returned list will be empty
-    assert!(
-      load_existing_wallet_login_information_at_file(wallet_file.clone(), &password)
-        .unwrap()
-        .is_empty()
-    );
-    assert!(
-      load_existing_wallet_login_information_at_file(wallet_file.clone(), &bad_password)
-        .unwrap()
-        .is_empty()
-    );
+    let id1 = WalletAccountId::new("first".to_string());
+    let id2 = WalletAccountId::new("second".to_string());
 
-    // store the first account
+    // Nothing was stored on the disk
+    assert!(matches!(
+      load_existing_wallet_at_file(wallet_file.clone()),
+      Err(BackendError::WalletFileNotFound),
+    ));
+    assert!(matches!(
+      load_existing_wallet_login_information_at_file(wallet_file.clone(), &id1, &password),
+      Err(BackendError::WalletFileNotFound),
+    ));
+
+    // Store the first account
     store_wallet_login_information_at_file(
       wallet_file.clone(),
       dummy_account1.clone(),
       cosmos_hd_path.clone(),
+      id1.clone(),
       &password,
     )
     .unwrap();
 
-    let encrypted_blob = read_encrypted_blob(wallet_file.clone());
+    let stored_wallet = load_existing_wallet_at_file(wallet_file.clone()).unwrap();
+    assert_eq!(stored_wallet.len(), 1);
+    assert_eq!(
+      stored_wallet.encrypted_account_by_index(0).unwrap().id,
+      WalletAccountId::new("first".to_string())
+    );
+    let encrypted_blob = &stored_wallet.encrypted_account_by_index(0).unwrap().account;
 
     // some actual ciphertext was saved
     assert!(!encrypted_blob.ciphertext().is_empty());
@@ -146,53 +178,78 @@ mod tests {
     let original_salt = encrypted_blob.salt().to_vec();
 
     // trying to load it with wrong password now fails
-    assert!(
-      load_existing_wallet_login_information_at_file(wallet_file.clone(), &bad_password).is_err()
-    );
+    assert!(matches!(
+      load_existing_wallet_login_information_at_file(wallet_file.clone(), &id1, &bad_password),
+      Err(BackendError::DecryptionError),
+    ));
+    // and with the wrong id also fails
+    assert!(matches!(
+      load_existing_wallet_login_information_at_file(wallet_file.clone(), &id2, &password),
+      Err(BackendError::NoSuchIdInWallet),
+    ));
 
-    let loaded_accounts =
-      load_existing_wallet_login_information_at_file(wallet_file.clone(), &password).unwrap();
-    println!("{:?}", loaded_accounts);
-    assert_eq!(1, loaded_accounts.len());
+    // and storing the same id again fails
+    assert!(matches!(
+      store_wallet_login_information_at_file(
+        wallet_file.clone(),
+        dummy_account1.clone(),
+        cosmos_hd_path.clone(),
+        id1.clone(),
+        &password,
+      ),
+      Err(BackendError::IdAlreadyExistsInWallet),
+    ));
 
-    let StoredAccount::Mnemonic(acc) = &loaded_accounts[0];
+    let loaded_account =
+      load_existing_wallet_login_information_at_file(wallet_file.clone(), &id1, &password).unwrap();
+
+    let StoredAccount::Mnemonic(ref acc) = loaded_account;
     assert_eq!(&dummy_account1, acc.mnemonic());
     assert_eq!(&cosmos_hd_path, acc.hd_path());
 
-    // can't store extra account if you use different password
-    assert!(store_wallet_login_information_at_file(
-      wallet_file.clone(),
-      dummy_account2.clone(),
-      cosmos_hd_path.clone(),
-      &bad_password,
-    )
-    .is_err());
+    // Can't store extra account if you use different password
+    assert!(matches!(
+      store_wallet_login_information_at_file(
+        wallet_file.clone(),
+        dummy_account2.clone(),
+        cosmos_hd_path.clone(),
+        id2.clone(),
+        &bad_password
+      ),
+      Err(BackendError::WalletDifferentPasswordDetected),
+    ));
 
     // add extra account properly now
     store_wallet_login_information_at_file(
       wallet_file.clone(),
       dummy_account2.clone(),
       different_hd_path.clone(),
+      id2.clone(),
       &password,
     )
     .unwrap();
 
-    let encrypted_blob = read_encrypted_blob(wallet_file.clone());
+    let loaded_accounts = load_existing_wallet_at_file(wallet_file.clone()).unwrap();
+    assert_eq!(2, loaded_accounts.len());
+    let encrypted_blob = &loaded_accounts
+      .encrypted_account_by_index(1)
+      .unwrap()
+      .account;
 
     // fresh IV and salt are used
     assert_ne!(original_iv, encrypted_blob.iv());
     assert_ne!(original_salt, encrypted_blob.salt());
 
-    let loaded_accounts =
-      load_existing_wallet_login_information_at_file(wallet_file, &password).unwrap();
-    assert_eq!(2, loaded_accounts.len());
-
     // first account should be unchanged
-    let StoredAccount::Mnemonic(acc1) = &loaded_accounts[0];
+    let loaded_account =
+      load_existing_wallet_login_information_at_file(wallet_file.clone(), &id1, &password).unwrap();
+    let StoredAccount::Mnemonic(ref acc1) = loaded_account;
     assert_eq!(&dummy_account1, acc1.mnemonic());
     assert_eq!(&cosmos_hd_path, acc1.hd_path());
 
-    let StoredAccount::Mnemonic(acc2) = &loaded_accounts[1];
+    let loaded_account =
+      load_existing_wallet_login_information_at_file(wallet_file, &id2, &password).unwrap();
+    let StoredAccount::Mnemonic(ref acc2) = loaded_account;
     assert_eq!(&dummy_account2, acc2.mnemonic());
     assert_eq!(&different_hd_path, acc2.hd_path());
   }

nym-wallet/src-tauri/src/wallet_storage/password.rs

@@ -1,8 +1,24 @@
 // Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
 // SPDX-License-Identifier: Apache-2.0
 
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use zeroize::Zeroize;
 
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub(crate) struct WalletAccountId(String);
+
+impl WalletAccountId {
+  pub(crate) fn new(id: String) -> WalletAccountId {
+    WalletAccountId(id)
+  }
+}
+
+impl AsRef<str> for WalletAccountId {
+  fn as_ref(&self) -> &str {
+    self.0.as_ref()
+  }
+}
+
 // simple wrapper for String that will get zeroized on drop
 #[derive(Zeroize)]
 #[zeroize(drop)]