fix: own function access keys without write permission

.devcontainer/devcontainer.json

@@ -0,0 +1,13 @@
+{
+    "image": "ghcr.io/near/near-devcontainer:latest",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "dtsvet.vscode-wasm",
+                "rust-lang.rust-analyzer",
+                "github.vscode-github-actions"
+            ]
+        }
+    },
+    "postCreateCommand": "./.devcontainer/post-create.sh"
+}

.devcontainer/post-create.sh

@@ -0,0 +1 @@
+#!/bin/bash

.github/workflows/unit_tests.yml

@@ -0,0 +1,27 @@
+name: Unit tests
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  codestyle:
+    name: Unit tests
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+          components: rustfmt
+      - name: Unit tests
+        run: cargo test