feat(core): payment backend

yarn.lock

@@ -671,6 +671,7 @@ __metadata:
     "@nestjs/apollo": "npm:^12.0.9"
     "@nestjs/common": "npm:^10.2.7"
     "@nestjs/core": "npm:^10.2.7"
+    "@nestjs/event-emitter": "npm:^2.0.2"
     "@nestjs/graphql": "npm:^12.0.9"
     "@nestjs/platform-express": "npm:^10.2.7"
     "@nestjs/platform-socket.io": "npm:^10.2.7"
@@ -735,6 +736,7 @@ __metadata:
     semver: "npm:^7.5.4"
     sinon: "npm:^16.1.0"
     socket.io: "npm:^4.7.2"
+    stripe: "npm:^13.6.0"
     supertest: "npm:^6.3.3"
     ts-node: "npm:^10.9.1"
     typescript: "npm:^5.2.2"
@@ -7280,6 +7282,19 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@nestjs/event-emitter@npm:^2.0.2":
+  version: 2.0.2
+  resolution: "@nestjs/event-emitter@npm:2.0.2"
+  dependencies:
+    eventemitter2: "npm:6.4.9"
+  peerDependencies:
+    "@nestjs/common": ^8.0.0 || ^9.0.0 || ^10.0.0
+    "@nestjs/core": ^8.0.0 || ^9.0.0 || ^10.0.0
+    reflect-metadata: ^0.1.12
+  checksum: 9c7d2645b14bef5a9d26a8fbafb5963e18c9c15e267980c55abd913c8af9215ae363b8c0fc78711c22126e0a973f80aec8b8e962a64e699f523128d11c033894
+  languageName: node
+  linkType: hard
+
 "@nestjs/graphql@npm:^12.0.9":
   version: 12.0.9
   resolution: "@nestjs/graphql@npm:12.0.9"
@@ -13432,6 +13447,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/node@npm:>=8.1.0":
+  version: 20.6.2
+  resolution: "@types/node@npm:20.6.2"
+  checksum: 4b150698cf90c211d4f2f021618f06c33a337d74e9a0ce10ec2e7123f02aacc231eff62118101f56de75f7be309c2da6eb0edb8388d501d4195c50bb919c7a05
+  languageName: node
+  linkType: hard
+
 "@types/node@npm:^16.0.0":
   version: 16.18.58
   resolution: "@types/node@npm:16.18.58"
@@ -20137,6 +20159,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"eventemitter2@npm:6.4.9":
+  version: 6.4.9
+  resolution: "eventemitter2@npm:6.4.9"
+  checksum: b829b1c6b11e15926b635092b5ad62b4463d1c928859831dcae606e988cf41893059e3541f5a8209d21d2f15314422ddd4d84d20830b4bf44978608d15b06b08
+  languageName: node
+  linkType: hard
+
 "eventemitter3@npm:^3.1.0":
   version: 3.1.2
   resolution: "eventemitter3@npm:3.1.2"
@@ -31941,6 +31970,16 @@ __metadata:
   languageName: node
   linkType: hard
 
+"stripe@npm:^13.6.0":
+  version: 13.6.0
+  resolution: "stripe@npm:13.6.0"
+  dependencies:
+    "@types/node": "npm:>=8.1.0"
+    qs: "npm:^6.11.0"
+  checksum: 3fae1ed3dc845166c36fb28e4297ec770bb1f1b35e88b0166c465a31d41216203341b1055bf63b653fa3c66cd5d2eb72fdfaec9b58a7d467d207645a12b2cde0
+  languageName: node
+  linkType: hard
+
 "strnum@npm:^1.0.5":
   version: 1.0.5
   resolution: "strnum@npm:1.0.5"