diff --git a/src/environment/constants/cache.ts b/src/environment/constants/cache.ts
new file mode 100644
index 0000000..e042c47
--- /dev/null
+++ b/src/environment/constants/cache.ts
@@ -0,0 +1,26 @@
+const cacheKeys = {
+ session: "session",
+ mailVerification: "mail-verification",
+ passwordReset: "password-reset",
+ emailChange: "email-change",
+ emailChangeCooldown: "email-change-cooldown",
+} as const;
+
+const cacheTTL = {
+ passwordReset: 1 * 60 * 60, // 1h
+ mailVerification: 3 * 60 * 60, // 3h
+ emailChange: 3 * 60 * 60, // 3h
+ emailChangeCooldown: 5 * 60, // 5m
+} as const;
+
+const generateCacheKey = {
+ session: (userId: string, token: string) =>
+ `${cacheKeys.session}:${userId}:${token}`,
+ mailVerification: (token: string) => `${cacheKeys.mailVerification}:${token}`,
+ passwordReset: (token: string) => `${cacheKeys.passwordReset}:${token}`,
+ emailChange: (token: string) => `${cacheKeys.emailChange}:${token}`,
+ emailChangeCooldown: (userId: string) =>
+ `${cacheKeys.emailChangeCooldown}:${userId}`,
+} as const;
+
+export { cacheKeys, cacheTTL, generateCacheKey };
diff --git a/src/environment/constants/http.ts b/src/environment/constants/http.ts
new file mode 100644
index 0000000..fcaa614
--- /dev/null
+++ b/src/environment/constants/http.ts
@@ -0,0 +1,54 @@
+const httpStatus = {
+ OK: 200,
+ CREATED: 201,
+ BAD_REQUEST: 400,
+ UNAUTHORIZED: 401,
+ FORBIDDEN: 403,
+ NOT_FOUND: 404,
+ METHOD_NOT_ALLOWED: 405,
+ NOT_ACCEPTABLE: 406,
+ CONFLICT: 409,
+ TOO_MANY_REQUESTS: 429,
+ INTERNAL_SERVER_ERROR: 500,
+ SERVICE_UNAVAILABLE: 503,
+};
+
+const errorMessages = {
+ NOT_AUTHENTICATED: "Not authenticated",
+ INVALID_CREDENTIALS: "Invalid credentials",
+ USER_ALREADY_LOGGED_IN: "User already logged in",
+
+ USER_NOT_FOUND: "User not found",
+ USERNAME_ALREADY_EXISTS: "Username already exists",
+ EMAIL_ALREADY_EXISTS: "Email already exists",
+
+ MISSING_REQUIRED_FIELDS: "Missing required fields",
+ INVALID_TOKEN: "Invalid or expired token",
+ INVALID_TOKEN_FORMAT: "Invalid token format",
+
+ INTERNAL_SERVER_ERROR: "Internal server error",
+ DATABASE_QUERY_FAILED: "Database query failed",
+ NOT_FOUND: "Not Found",
+ METHOD_NOT_ALLOWED: "Method Not Allowed",
+
+ EMAIL_SEND_FAILED: "Failed to send email. Please try again.",
+ EMAIL_ALREADY_VERIFIED: "Email is already verified",
+
+ PASSWORD_SAME_AS_CURRENT:
+ "New password must be different from current password",
+ CURRENT_PASSWORD_INCORRECT: "Current password is incorrect",
+};
+
+const successMessages = {
+ LOGIN_SUCCESSFUL: "Login successful",
+ LOGOUT_SUCCESSFUL: "Logged out successfully",
+ EMAIL_VERIFIED: "Email verified successfully",
+ PASSWORD_UPDATED: "Password updated successfully",
+ USER_INFO_UPDATED: "User information updated successfully",
+ PASSWORD_RESET_SENT:
+ "If the email exists, a password reset link has been sent",
+ REGISTRATION_SUCCESSFUL:
+ "User registered successfully - please check your email to verify your account",
+};
+
+export { httpStatus, errorMessages, successMessages };
diff --git a/src/environment/constants/index.ts b/src/environment/constants/index.ts
index 6ca789c..062632b 100644
--- a/src/environment/constants/index.ts
+++ b/src/environment/constants/index.ts
@@ -32,3 +32,5 @@ export * from "./validation";
export * from "./database";
export * from "./mailer";
export * from "./user";
+export * from "./cache";
+export * from "./http";
diff --git a/src/environment/constants/user/index.ts b/src/environment/constants/user/index.ts
index 635be64..082e610 100644
--- a/src/environment/constants/user/index.ts
+++ b/src/environment/constants/user/index.ts
@@ -1 +1,7 @@
-export * from "./update";
+const passwordHashing = {
+ algorithm: "argon2id" as const,
+ memoryCost: 4096,
+ timeCost: 3,
+} as const;
+
+export { passwordHashing };
diff --git a/src/environment/constants/user/update.ts b/src/environment/constants/user/update.ts
deleted file mode 100644
index f69fe57..0000000
--- a/src/environment/constants/user/update.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-const emailUpdateTimes = {
- coolDownMinutes: 5,
- tokenExpiryHours: 3,
-};
-
-export { emailUpdateTimes };
diff --git a/src/environment/mailer/templates/email-change-completed-notification.html b/src/environment/mailer/templates/email-change-completed-notification.html
index 87cb9c4..c89439d 100644
--- a/src/environment/mailer/templates/email-change-completed-notification.html
+++ b/src/environment/mailer/templates/email-change-completed-notification.html
@@ -35,6 +35,6 @@
If this change was not authorized by you: Contact our support team immediately at {{supportEmail}}. Your account may have been compromised and we will help you recover it.
- User ID: {{id}} | {{companyName}}
+ User ID: {{id}}