Added accounts

src/engine/store/accounts.rs

@@ -0,0 +1,41 @@
+use std::collections::HashMap;
+
+use hypersdk::U160;
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub struct Account {
+    pub address: U160,
+    pub private_key: String,
+}
+
+#[derive(Debug, Default, serde::Serialize, serde::Deserialize)]
+pub struct AccountList(pub HashMap<String, Account>);
+
+impl AccountList {
+    pub async fn new() -> tokio::io::Result<Self> {
+        let path = crate::store::pulse_accounts_file()?;
+
+        if !path.exists() {
+            let default = Self::default();
+
+            tokio::fs::create_dir_all(path.parent().unwrap()).await?;
+            tokio::fs::write(&path, default.to_string()?).await?;
+
+            return Ok(default);
+        }
+
+        let output = tokio::fs::read_to_string(path).await?;
+
+        Self::from_str(&output)
+    }
+
+    pub fn from_str(s: &str) -> tokio::io::Result<Self> {
+        toml::from_str(s)
+            .map_err(|v| tokio::io::Error::new(std::io::ErrorKind::InvalidInput, v.to_string()))
+    }
+
+    pub fn to_string(&self) -> tokio::io::Result<String> {
+        toml::to_string(self)
+            .map_err(|v| tokio::io::Error::new(std::io::ErrorKind::Other, v.to_string()))
+    }
+}