add stableCoinVault and its test files

basic/stable-coin/.gitignore

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+archive
+build
+coverage
+coverage.json
+cache
+removed
+.env
+.vscode
+yarn-error.log
+z*.sh
+
+# Visual studio code
+core/*/.vscode
+defi/*/.vscode
+nft/*/.vscode
+
+# macOS folder attributes
+.DS_Store
+
+# Rust auto-generated
+target/
+Cargo.lock
+**/*.rs.bk
+
+# Flamegraph profiles
+flamegraph.svg
+
+# IntelliJ
+.idea/
+
+# Emacs
+*~

basic/stable-coin/Cargo.toml

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+[package]
+name = "stable-coin-vault"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+sbor = { git = "https://github.com/radixdlt/radixdlt-scrypto", tag = "v0.7.0" }
+scrypto = { git = "https://github.com/radixdlt/radixdlt-scrypto", tag = "v0.7.0" }
+
+[dev-dependencies]
+transaction = { git = "https://github.com/radixdlt/radixdlt-scrypto", tag = "v0.7.0" }
+radix-engine = { git = "https://github.com/radixdlt/radixdlt-scrypto", tag = "v0.7.0" }
+scrypto-unit = { git = "https://github.com/radixdlt/radixdlt-scrypto", tag = "v0.7.0" }
+
+[profile.release]
+opt-level = 's'        # Optimize for size.
+lto = true             # Enable Link Time Optimization.
+codegen-units = 1      # Reduce number of codegen units to increase optimizations.
+panic = 'abort'        # Abort on panic.
+strip = "debuginfo"    # Strip debug info.
+overflow-checks = true # Panic in the case of an overflow.
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[workspace]
+# Set the package crate as its own empty workspace, to hide it from any potential ancestor workspace
+# Remove this [workspace] section if you intend the package to be part of a Cargo workspace

basic/stable-coin/LICENSE

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+MIT License
+
+Copyright (c) 2022 AuroraLantean
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

basic/stable-coin/README.md

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+# Radix Stablecoin Vault
+
+## Description
+
+A Stablecoin vault blueprint that can
+
+- mint tokens to the vault or to the admin badge holder
+- withdraw tokens from the vault to admin bucket
+- deposit tokens from admin bucket into the vault
+- burn tokens inside the vault or from admin bucket
+- get the vault status data: version, token amount, total supply
+- set version to mark future upgrades
+
+## Installation
+
+The following steps assume working in a Linux environment.
+
+See official installation guide for other operation systems:
+https://docs-babylon.radixdlt.com/main/getting-started-developers/first-component/install-scrypto.html
+
+Install build dependencies
+
+```bash
+sudo apt install clang build-essential llvm
+```
+
+### Install Rust
+
+https://www.rust-lang.org/tools/install
+
+If you already have Rust:
+
+```bash
+rustup update stable
+```
+
+OR install it the first time
+
+```bash
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+```
+
+Add WebAssembly target
+
+```bash
+rustup target add wasm32-unknown-unknown
+```
+
+Add Rust in your PATH:
+
+```
+export PATH="~/.cargo/bin:$PATH"
+```
+
+To configure your current shell and confirm Rust installation:
+
+```bash
+source $HOME/.cargo/env
+rustc --version
+```
+
+### Install Scrypto
+
+```bash
+git clone https://github.com/radixdlt/radixdlt-scrypto.git
+cd radixdlt-scrypto
+cargo install --path ./simulator
+resim -V
+```
+
+### Install VS Code Extensions
+
+- Rust-Analyzer
+- Radix Transaction Manifest Support
+
+```bash
+code --install-extension rust-lang.rust-analyzer
+code --install-extension RadixPublishing.radix-transaction-manifest-support
+```
+
+### Install Repository Dependencies
+
+```bash
+git clone https://github.com/AuroraLantean/radix_stablecoin_vault
+cd radix_stablecoin_vault
+scrypto build
+```
+
+This is only needed for the first time to install all Rust dependencies. For subsequent building, the above command can be omitted as running tests will automatically build everything again.
+
+### Run Automatic Tests
+
+Adding `-- --nocapture` will force logs to show even there is no error.
+
+```bash
+scrypto test
+scrypto test -- --nocapture
+```
+
+### Run Manual Tests
+
+1. Create a new account, and save the account address
+
+```
+resim new-account
+```
+
+2. Publish the package, and save the package address:
+
+```
+resim publish .
+```
+
+3. Call the `new` function to instantiate a component, and save the component address:
+
+```
+resim call-function <PACKAGE_ADDRESS> StableCoinVault new
+```
+
+4. Call the `mint_to_bucket` method of the component:
+
+```
+resim call-method <COMPONENT_ADDRESS> mint_to_bucket 100
+```
+
+5. Check out our balance
+
+```
+resim show <ACCOUNT_ADDRESS>
+```