🚨 Feature: Add basic data structures

This includes structures for accounts, common account errors, and transactions

src/main.rs

@@ -5,6 +5,9 @@ use std::collections::HashMap;
 #[derive(Debug)]
 enum AccountingError {
     // Add variants here for account not found, account underfunded and account overfunded
+    AccountNotFound(String) ,
+    AccountUnderFunded(String, u64),
+    AccountOverFunded(String, u64),
 }
 
 /// A transaction type. Transactions should be able to rebuild a ledger's state
@@ -12,12 +15,15 @@ enum AccountingError {
 #[derive(Debug)]
 pub enum Tx {
     // Add variants for storing withdraw/deposit transactions
+    Withdraw{account:String, amount:u64},
+    Deposit{account:String, amount:u64},
 }
 
 /// A type for managing accounts and their current currency balance
 #[derive(Debug)]
 struct Accounts {
     // Add a property `accounts` here
+    accounts: HashMap<String, u64>,
 }
 
 impl Accounts {