feat: add additionalFields option in verification table schema (#6747)

packages/core/src/db/get-tables.ts

@@ -47,7 +47,8 @@ export const getAuthTables = (
 		},
 	} satisfies BetterAuthDBSchema;
 
-	const { user, session, account, ...pluginTables } = pluginSchema;
+	const { user, session, account, verification, ...pluginTables } =
+		pluginSchema;
 
 	const sessionTable = {
 		session: {
@@ -267,6 +268,8 @@ export const getAuthTables = (
 					onUpdate: () => new Date(),
 					fieldName: options.verification?.fields?.updatedAt || "updatedAt",
 				},
+				...verification?.fields,
+				...options.verification?.additionalFields,
 			},
 			order: 4,
 		},

packages/core/src/db/test/get-tables.test.ts

@@ -59,4 +59,25 @@ describe("getAuthTables", () => {
 		expect(refreshTokenExpiresAtField.fieldName).toBe("refreshTokenExpiresAt");
 		expect(accessTokenExpiresAtField.fieldName).toBe("accessTokenExpiresAt");
 	});
+
+	it("should merge additionalFields into verification table metadata", () => {
+		const tables = getAuthTables({
+			verification: {
+				additionalFields: {
+					newField: {
+						fieldName: "new_field",
+						type: "string",
+					},
+				},
+			},
+		});
+
+		const verificationTable = tables.verification;
+		const newField = verificationTable!.fields.newField!;
+
+		console.log(newField);
+		expect(newField).not.toBeUndefined();
+		expect(newField.fieldName).toBe("new_field");
+		expect(newField.type).toBe("string");
+	});
 });

packages/core/src/types/init-options.ts

@@ -954,6 +954,12 @@ export type BetterAuthOptions = {
 				 * Map verification fields
 				 */
 				fields?: Partial<Record<keyof OmitId<Verification>, string>>;
+				/**
+				 * Additional fields for the verification
+				 */
+				additionalFields?: {
+					[key: string]: DBFieldAttribute;
+				};
 				/**
 				 * disable cleaning up expired values when a verification value is
 				 * fetched