Change object model and add crate Error type

src/lib.rs

@@ -2,3 +2,29 @@ mod transaction;
 pub use transaction::Transaction;
 pub mod csv;
 pub mod ynab;
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("HTTP Error: {0}")]
+    Http(#[from] reqwest::Error),
+    #[error("parse error: {0}")]
+    Parse(#[from] serde_json::Error),
+    #[error("csv error: {0}")]
+    Csv(#[from] ::csv::Error),
+    #[error("io error: {0}")]
+    Io(#[from] std::io::Error),
+    #[error("couldn't parse amount: {0}")]
+    AmountParse(#[from] std::num::ParseIntError),
+
+    #[error("plan not found: {0}")]
+    PlanNotFound(String),
+    #[error("account not found: {0}")]
+    AccountNotFound(String),
+    #[error("empty amount")]
+    AmountEmpty,
+    #[error("bank format not found: {0}")]
+    BankFormat(String),
+    /// Errors I've been too lazy to give a type yet
+    #[error("{0}")]
+    Text(String),
+}