From 5d4621df83c3c2d3503a781d76bf7d7135dbdcd1 Mon Sep 17 00:00:00 2001 From: Naomi Carrigan Date: Sun, 6 Jul 2025 12:49:55 -0700 Subject: [PATCH] feat: add endpoint for entitlement events --- package.json | 4 +- pnpm-lock.yaml | 107 +++++++++++++++++++++++++++++++++ src/config/applicationData.ts | 96 +++++++++++++++++++++++++++++ src/interfaces/entitlement.ts | 31 ++++++++++ src/modules/discord.ts | 2 + src/modules/validateWebhook.ts | 46 ++++++++++++++ src/server/serve.ts | 87 +++++++++++++++++++++++++-- 7 files changed, 367 insertions(+), 6 deletions(-) create mode 100644 src/config/applicationData.ts create mode 100644 src/interfaces/entitlement.ts create mode 100644 src/modules/validateWebhook.ts diff --git a/package.json b/package.json index 536e3c6..7dfa4de 100644 --- a/package.json +++ b/package.json @@ -23,6 +23,8 @@ }, "dependencies": { "fastify": "5.2.1", - "nodemailer": "6.10.0" + "fastify-raw-body": "5.0.0", + "nodemailer": "6.10.0", + "tweetnacl": "1.0.3" } } diff --git 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iconv-lite: 0.6.3 + unpipe: 1.0.0 + react-is@16.13.1: {} react@19.0.0: {} @@ -3924,6 +4017,10 @@ snapshots: safe-stable-stringify@2.5.0: {} + safer-buffer@2.1.2: {} + + secure-json-parse@2.7.0: {} + secure-json-parse@3.0.2: {} semver@5.7.2: {} @@ -3956,6 +4053,8 @@ snapshots: es-errors: 1.3.0 es-object-atoms: 1.1.1 + setprototypeof@1.2.0: {} + shebang-command@2.0.0: dependencies: shebang-regex: 3.0.0 @@ -4025,6 +4124,8 @@ snapshots: stackback@0.0.2: {} + statuses@2.0.1: {} + std-env@3.8.0: {} string.prototype.matchall@4.0.12: @@ -4110,6 +4211,8 @@ snapshots: toad-cache@3.7.0: {} + toidentifier@1.0.1: {} + ts-api-utils@1.4.3(typescript@5.7.3): dependencies: typescript: 5.7.3 @@ -4127,6 +4230,8 @@ snapshots: tslib@2.8.1: {} + tweetnacl@1.0.3: {} + type-check@0.4.0: dependencies: prelude-ls: 1.2.1 @@ -4181,6 +4286,8 @@ snapshots: undici-types@6.20.0: {} + unpipe@1.0.0: {} + update-browserslist-db@1.1.2(browserslist@4.24.4): dependencies: browserslist: 4.24.4 diff --git a/src/config/applicationData.ts b/src/config/applicationData.ts new file mode 100644 index 0000000..ea8a82b --- /dev/null +++ b/src/config/applicationData.ts @@ -0,0 +1,96 @@ +/** + * @copyright nhcarrigan + * @license Naomi's Public License + * @author Naomi Carrigan + */ +/* eslint-disable @typescript-eslint/naming-convention -- We are using the numerical ids as the keys.*/ +export const applicationData: Record = { + "1235128719836712970": { + key: "e255cd3a348ce604e18e2f2c0f5a59a9273a420ca732630d569ef5f839f2143e", + name: "Celestine", + }, + "1338596130207957035": { + key: "ef9d2a3c8e9a4d165a12ca798be93d719dd51cc7ff901ade8136cb992cd7fe3e", + name: "Aria Iuvo", + }, + "1338664192714211459": { + key: "a28c9c2683acb209341e04d5b43bd2a24bc81f5b263095a1bf487e94ca6a3ff9", + name: "Cordelia Taryne", + }, + "1338753576583041074": { + key: "62468252371a68791c650b5aaa599ef2b7b148a7169bb5fa9f56075705ac405e", + name: "Melody Iuvo", + }, + "1343341112437248041": { + key: "3ccf23b9c10dda9a7af434e0c5fc116d05aba66caf2ebd8c738c60ba9875436f", + name: "Becca Lyria", + }, + "1343370633916059668": { + key: "a9146e39ab5f69129e3c50db5d5848c56bc4a2cb90bba10e492e08355acd3d12", + name: "Maylin Taryne", + }, + "1343413943447584819": { + key: "6d95c7132ee9f28a4ea5fffbc8dd33ecaffe0f50add0c631d5ef51cc071bd2df", + name: "Gwen Abalise", + }, + "1347642447643017289": { + key: "091be058344e543e87baafeb9fe20b004bd170ca5ee57b17afff595271080a27", + name: "Mommy", + }, + "1386862413936328796": { + key: "831e3981135a4c9d30e8c02e6f8cba73436d30c36b1a14f1fb7bc7147cd4cb75", + name: "Maribelle", + }, + "1391117878182281316": { + key: "b182039c954ba57216bf53bdc4d5ba3d89efc2b41c850cbf7f3430fbb6cc0c56", + name: "Hikari", + }, + "1391488058913718374": { + key: "fc1a838c3102351602221f2db63d997f9e4495510044d5ec436844038b9a5bd5", + name: "Rosalia Nightsong", + }, + "1391489982887362761": { + key: "ef173a181d6fcf506b72795812fca8ecc3a81c2ff382bfd39564bab63fd90eee", + name: "Sorielle", + }, + "1391491102657482863": { + key: "a412583e5d5510aebb6d54eb49f36797e62f9567efd79108863adbb93cf00236", + name: "Verena", + }, + "1391492296222179459": { + key: "aab61af4411fc1dc710d5b5aba5d16fba9effaad9415b878a3f1595428dbebcd", + name: "Liora", + }, + "1391493722176356434": { + key: "3dc2abd018271a5a1f65c09597738a711b2fc619d34da59189279d6c2a1922f4", + name: "Thessalia", + }, + "1391494389477412906": { + key: "8d11517cf954779e4645b8c10432697a0572dcfcecc0bb14d0fe2397f5a03453", + name: "Callista", + }, + "1391495288421879849": { + key: "fb0894e2dcd3e736addd70a675b40d5681d39c133289cdfe4f7378006163e817", + name: "Eirene", + }, + "1391497269177483405": { + key: "0887f7e12053d559f8944a06ed323ec237d34f8e15860b672fb7abe6dc32d192", + name: "Sybil", + }, + "1391503229287928000": { + key: "8a4d4f18dae4e2d0ec610e3da47254a812c39cfac6ee986cfaa20eb848a2db92", + name: "Clarion", + }, + "1391503834073006181": { + key: "60ffe0a3503d5166c1e4b7370753793dff60d75a28ebf4ace8b6623ad5207821", + name: "Evangeline", + }, + "1391504577811185744": { + key: "33bb085873b46199facfbfae00b7d71ed04d55377deeaa2a0c8afa303c68a75d", + name: "Theodora", + }, + "1391505285465509978": { + key: "edce882890078d52c00c653b9e305565a909a0807abf86b36f1d7679434b80fa", + name: "Veluna", + }, +}; diff --git a/src/interfaces/entitlement.ts b/src/interfaces/entitlement.ts new file mode 100644 index 0000000..abe43b8 --- /dev/null +++ b/src/interfaces/entitlement.ts @@ -0,0 +1,31 @@ +/** + * @copyright nhcarrigan + * @license Naomi's Public License + * @author Naomi Carrigan + */ + +/* eslint-disable @typescript-eslint/naming-convention -- Needs to match Discord's structure. */ +export interface Entitlement { + application_id: string; + event: { + data: { + application_id: string; + consumed: boolean; + deleted: boolean; + ends_at: string; + gift_code_flags: number; + guild_id: string; + id: string; + promotion_id: string | null; + sku_id: string; + starts_at: string; + subscription_id: string; + type: number; + user_id: string; + }; + timestamp: string; + type: string; + }; + type: number; + version: number; +} diff --git a/src/modules/discord.ts b/src/modules/discord.ts index e303e21..89ff13e 100644 --- a/src/modules/discord.ts +++ b/src/modules/discord.ts @@ -17,6 +17,7 @@ export const sendDiscord = async( body: JSON.stringify({ components: [ { + // eslint-disable-next-line @typescript-eslint/naming-convention -- Needs to match Discord's structure. accent_color: 15_418_782, components: [ { @@ -40,6 +41,7 @@ export const sendDiscord = async( flags: 32_768, }), headers: { + // eslint-disable-next-line @typescript-eslint/naming-convention -- Needs to match Discord's structure. "Content-Type": "application/json", }, method: "POST", diff --git a/src/modules/validateWebhook.ts b/src/modules/validateWebhook.ts new file mode 100644 index 0000000..e240259 --- /dev/null +++ b/src/modules/validateWebhook.ts @@ -0,0 +1,46 @@ +/** + * @copyright nhcarrigan + * @license Naomi's Public License + * @author Naomi Carrigan + */ +import nacl from "tweetnacl"; +import { applicationData } from "../config/applicationData.js"; +import type { Entitlement } from "../interfaces/entitlement.js"; +import type { FastifyRequest } from "fastify"; + +/** + * Validates that the webhook request is from Discord by checking the signature. + * @param request - The Fastify request object containing the webhook data. + * @returns A boolean indicating whether the webhook signature is valid. + */ +export const validateWebhook = ( + // eslint-disable-next-line @typescript-eslint/naming-convention -- Body must be capitalised for Fastify. + request: FastifyRequest<{ Body: Entitlement }>, +): boolean => { + const { application_id: applicationId } = request.body; + const appData = applicationData[applicationId]; + if (appData === undefined) { + return false; + } + const signature = request.headers["x-signature-ed25519"]; + const timestamp = request.headers["x-signature-timestamp"]; + const { rawBody } = request; + if ( + signature === undefined + || timestamp === undefined + || rawBody === undefined + ) { + return false; + } + return nacl.sign.detached.verify( + // eslint-disable-next-line @typescript-eslint/restrict-template-expressions -- Being lazy here, tbh. + Buffer.from(`${timestamp}${rawBody}`), + Buffer.from( + Array.isArray(signature) + ? signature[0] ?? signature.join("") + : signature, + "hex", + ), + Buffer.from(process.env.DISCORD_PUBLIC_KEY ?? "", "hex"), + ); +}; diff --git a/src/server/serve.ts b/src/server/serve.ts index f2aadb5..e789bc7 100644 --- a/src/server/serve.ts +++ b/src/server/serve.ts @@ -5,12 +5,16 @@ */ import fastify from "fastify"; +import fastifyRawBody from "fastify-raw-body"; +import { applicationData } from "../config/applicationData.js"; import { auth } from "../modules/auth.js"; import { sendDiscord } from "../modules/discord.js"; import { sendMail } from "../modules/sendMail.js"; +import { validateWebhook } from "../modules/validateWebhook.js"; import { errorSchema } from "../schemas/errorSchema.js"; import { logSchema } from "../schemas/logSchema.js"; import { uptimeSchema } from "../schemas/uptimeSchema.js"; +import type { Entitlement } from "../interfaces/entitlement.js"; import type { Error } from "../interfaces/error.js"; import type { Log } from "../interfaces/log.js"; import type { Uptime } from "../interfaces/uptime.js"; @@ -63,6 +67,15 @@ export const instantiateServer = (): void => { logger: false, }); + server.register(fastifyRawBody, { + encoding: "utf8", + field: "rawBody", + global: false, + jsonContentTypes: [], + routes: [], + runFirst: true, + }); + server.get("/", (_request, response) => { response.header("Content-Type", "text/html"); response.send(html); @@ -90,7 +103,10 @@ export const instantiateServer = (): void => { return; } const { application, context, stack, message } = request.body; - await sendMail(`[ERROR]: ${context} - ${application}`, `${message}\n\n${stack}`); + await sendMail( + `[ERROR]: ${context} - ${application}`, + `${message}\n\n${stack}`, + ); await sendDiscord( `[ERROR]: ${context} - ${application}`, `${message}\n\n\`\`\`\n${stack}\n\`\`\``, @@ -115,13 +131,68 @@ export const instantiateServer = (): void => { }, ); + // eslint-disable-next-line @typescript-eslint/naming-convention -- Body must be capitalised for Fastify. + server.post<{ Body: Entitlement }>( + "/entitlement", + { config: { rawBody: true } }, + async(request, response) => { + if (!validateWebhook(request)) { + await response.status(401).send({ success: false }); + void sendDiscord( + "[NOTIFICATION]: Entitlement Event", + "An invalid webhook signature was received.", + ); + void sendMail( + "[NOTIFICATION]: Entitlement Event", + "An invalid webhook signature was received.", + ); + return; + } + const { type } = request.body; + if (type === 0) { + await response.status(204).send(); + void sendDiscord( + "[NOTIFICATION]: Entitlement Event", + "Received a ping from Discord.", + ); + void sendMail( + "[NOTIFICATION]: Entitlement Event", + "Received a ping from Discord.", + ); + return; + } + await response.status(204).send(); + const { application_id: applicationId, event } = request.body; + const { + user_id: userId, + guild_id: guildId, + ends_at: endsAt, + } = event.data; + const appInfo = applicationData[applicationId]; + await sendDiscord( + `[ENTITLEMENT]: ${appInfo?.name ?? applicationId}`, + `Entitlement purchased!\n- **User ID**: ${userId}\n- **Guild ID**: ${guildId}\n- **Ends At**: ${endsAt}`, + ); + await sendMail( + `[ENTITLEMENT]: ${appInfo?.name ?? applicationId}`, + `Entitlement purchased!\n- **User ID**: ${userId}\n- **Guild ID**: ${guildId}\n- **Ends At**: ${endsAt}`, + ); + }, + ); + server.listen({ port: 5003 }, (error) => { const application = "Alert Server"; if (error) { const { message, stack } = error; const context = "Server Startup"; - void sendMail(`[ERROR]: ${context} - ${application}`, `${message}\n\n${String(stack)}`); - void sendDiscord(`[ERROR]: ${context} - ${application}`, `${message}\n\n\`\`\`\n${String(stack)}\n\`\`\``); + void sendMail( + `[ERROR]: ${context} - ${application}`, + `${message}\n\n${String(stack)}`, + ); + void sendDiscord( + `[ERROR]: ${context} - ${application}`, + `${message}\n\n\`\`\`\n${String(stack)}\n\`\`\``, + ); return; } const level = "debug"; @@ -134,7 +205,13 @@ export const instantiateServer = (): void => { const context = "Server Startup"; // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Totally being lazy. const { message, stack } = error as Error; - void sendMail(`[ERROR]: ${context} - ${application}`, `${message}\n\n${stack}`); - void sendDiscord(`[ERROR]: ${context} - ${application}`, `${message}\n\n\`\`\`\n${stack}\n\`\`\``); + void sendMail( + `[ERROR]: ${context} - ${application}`, + `${message}\n\n${stack}`, + ); + void sendDiscord( + `[ERROR]: ${context} - ${application}`, + `${message}\n\n\`\`\`\n${stack}\n\`\`\``, + ); } };