From 6699b4d6eb7a158ef027f4128d62c4ad63a696d9 Mon Sep 17 00:00:00 2001
From: einhorn_b <dariofrodo@gmx.de>
Date: Wed, 29 Sep 2021 18:47:10 +0200
Subject: [PATCH] first steps for send coins

---
 .gitmodules                  |  3 +++
 backend/package.json         |  3 +++
 backend/src/proto            |  1 +
 backend/src/util/validate.ts | 21 ++++++++++++++++++++-
 4 files changed, 27 insertions(+), 1 deletion(-)
 create mode 160000 backend/src/proto

diff --git a/.gitmodules b/.gitmodules
index 22790ccc7..5026a5b8a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -34,3 +34,6 @@
 [submodule "login_server/dependencies/protobuf"]
 	path = login_server/dependencies/protobuf
 	url = https://github.com/protocolbuffers/protobuf.git
+[submodule "backend/src/proto"]
+	path = backend/src/proto
+	url = git@github.com:gradido/gradido_protocol.git
diff --git a/backend/package.json b/backend/package.json
index 4719595bb..5e3d712b3 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -16,6 +16,7 @@
     "test": "jest --coverage"
   },
   "dependencies": {
+    "@apollo/protobufjs": "^1.2.2",
     "@types/jest": "^27.0.2",
     "apollo-server-express": "^2.25.2",
     "axios": "^0.21.1",
@@ -26,6 +27,7 @@
     "graphql": "^15.5.1",
     "jest": "^27.2.4",
     "jsonwebtoken": "^8.5.1",
+    "libsodium-wrappers": "^0.7.9",
     "mysql2": "^2.3.0",
     "reflect-metadata": "^0.1.13",
     "ts-jest": "^27.0.5",
@@ -35,6 +37,7 @@
   "devDependencies": {
     "@types/express": "^4.17.12",
     "@types/jsonwebtoken": "^8.5.2",
+    "@types/libsodium-wrappers": "^0.7.9",
     "@typescript-eslint/eslint-plugin": "^4.28.0",
     "@typescript-eslint/parser": "^4.28.0",
     "eslint": "^7.29.0",
diff --git a/backend/src/proto b/backend/src/proto
new file mode 160000
index 000000000..cc9acbb21
--- /dev/null
+++ b/backend/src/proto
@@ -0,0 +1 @@
+Subproject commit cc9acbb212201a560d86fc87a47665497f11f27d
diff --git a/backend/src/util/validate.ts b/backend/src/util/validate.ts
index 6a38e5526..6f6c5af70 100644
--- a/backend/src/util/validate.ts
+++ b/backend/src/util/validate.ts
@@ -1,3 +1,8 @@
+import { User as dbUser } from '../typeorm/entity/User'
+import { Balance as dbBalance } from '../typeorm/entity/Balance'
+import { getRepository } from 'typeorm'
+import { calculateDecay } from './decay'
+
 function isStringBoolean(value: string): boolean {
   const lowerValue = value.toLowerCase()
   if (lowerValue === 'true' || lowerValue === 'false') {
@@ -6,4 +11,18 @@ function isStringBoolean(value: string): boolean {
   return false
 }
 
-export { isStringBoolean }
+function isHexPublicKey(publicKey:string): boolean {
+    return /^[0-9A-Fa-f]{64}$/i.test(publicKey)
+}
+
+async function hasUserAmount(user:dbUser, amount:number): Promise<boolean> {
+    if(amount < 0) return false
+    const balanceRepository = getRepository(dbBalance)
+    const balance = await balanceRepository.findOne({ userId: user.id })
+    if(!balance) return false
+
+    const decay = await calculateDecay(balance.amount, balance.recordDate, new Date())
+    return decay > amount
+}
+
+export { isHexPublicKey, hasUserAmount, isStringBoolean }
\ No newline at end of file