added account api

src/main/java/net/thenextlvl/services/economy/account/Account.java

@@ -0,0 +1,39 @@
+package net.thenextlvl.services.economy.account;
+
+import java.util.UUID;
+
+/**
+ * Account is an interface representing a financial account.
+ */
+public interface Account {
+
+    /**
+     * Returns the UUID of the owner of this account.
+     *
+     * @return the UUID of the owner
+     */
+    UUID getOwner();
+
+    /**
+     * Retrieves the balance of the account.
+     *
+     * @return the balance of the account
+     */
+    double getBalance();
+
+    /**
+     * Withdraws the specified amount from the account balance.
+     *
+     * @param amount the amount to be withdrawn
+     * @return the new balance after the withdrawal
+     */
+    double withdraw(double amount);
+
+    /**
+     * Deposits the specified amount into the account balance.
+     *
+     * @param amount the amount to be deposited
+     * @return the new balance after the deposit
+     */
+    double deposit(double amount);
+}

src/main/java/net/thenextlvl/services/economy/account/AccountController.java

@@ -0,0 +1,67 @@
+package net.thenextlvl.services.economy.account;
+
+import org.bukkit.OfflinePlayer;
+
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * The AccountController interface provides methods to create, retrieve and delete accounts.
+ */
+public interface AccountController {
+    /**
+     * Creates an account with the given unique ID.
+     *
+     * @param uniqueId the unique ID of the account to be created
+     * @return a CompletableFuture that will complete with the created account
+     */
+    CompletableFuture<Account> createAccount(UUID uniqueId);
+
+    /**
+     * Creates an account for the specified player.
+     *
+     * @param player the player for whom the account will be created
+     * @return a CompletableFuture that will complete with the created account
+     */
+    CompletableFuture<Account> createAccount(OfflinePlayer player);
+
+    /**
+     * Retrieves the account for the specified player.
+     *
+     * @param player the player for whom the account will be retrieved
+     * @return a CompletableFuture that will complete with the retrieved account
+     */
+    CompletableFuture<Account> getAccount(OfflinePlayer player);
+
+    /**
+     * Retrieves the account with the specified unique ID.
+     *
+     * @param uniqueId the unique ID of the account to be retrieved
+     * @return a CompletableFuture that will complete with the retrieved account
+     */
+    CompletableFuture<Account> getAccount(UUID uniqueId);
+
+    /**
+     * Deletes the specified account.
+     *
+     * @param account the account to be deleted
+     * @return a CompletableFuture that will complete when the account is deleted
+     */
+    CompletableFuture<Void> deleteAccount(Account account);
+
+    /**
+     * Deletes the account of the specified player.
+     *
+     * @param player the player whose account will be deleted
+     * @return a CompletableFuture that will complete when the account is deleted
+     */
+    CompletableFuture<Void> deleteAccount(OfflinePlayer player);
+
+    /**
+     * Deletes the account with the specified unique ID.
+     *
+     * @param uniqueId the unique ID of the account to be deleted
+     * @return a CompletableFuture that will complete when the account is deleted
+     */
+    CompletableFuture<Void> deleteAccount(UUID uniqueId);
+}

src/main/java/net/thenextlvl/services/economy/account/package-info.java

@@ -0,0 +1,10 @@
+@TypesAreNotNullByDefault
+@FieldsAreNotNullByDefault
+@MethodsReturnNotNullByDefault
+@ParametersAreNotNullByDefault
+package net.thenextlvl.services.economy.account;
+
+import core.annotation.FieldsAreNotNullByDefault;
+import core.annotation.MethodsReturnNotNullByDefault;
+import core.annotation.ParametersAreNotNullByDefault;
+import core.annotation.TypesAreNotNullByDefault;