Cryptocurrency Advanced: Service with Data Proofs

The extended version of the Cryptocurrency Service implementing data proofs. This project demonstrates how to bootstrap your own cryptocurrency with Exonum blockchain.

See the documentation for a detailed step-by-step guide how to approach this example.

Exonum blockchain keeps balances of users and handles secure transactions between them.

It implements most basic operations:

• Create a new user
• Add funds to the user's balance
• Transfer funds between users

Install and run

Using docker

Simply run the following command to start the cryptocurrency service on 4 nodes on the local machine:

bash docker run -p 8000-8008:8000-8008 exonumhub/exonum-cryptocurrency-advanced:demo

Ready! Find demo at http://127.0.0.1:8008.

Docker will automatically pull image from the repository and run 4 nodes with public endpoints at 127.0.0.1:8000, ..., 127.0.0.1:8003 and private ones at 127.0.0.1:8004, ..., 127.0.0.1:8007.

To stop docker container, use docker stop <container id> command.

Manually

Getting started

Be sure you installed necessary packages:

• git
• Node.js with npm
• Rust compiler

Install and run

Below you will find a step-by-step guide to starting the cryptocurrency service on 4 nodes on the local machine.

Build the project:

```sh cd examples/cryptocurrency-advanced/backend

cargo install ```

Generate template:

```sh mkdir example

exonum-cryptocurrency-advanced generate-template example/common.toml --validators-count 4 ```

Generate public and secrets keys for each node:

```sh exonum-cryptocurrency-advanced generate-config example/common.toml example/pub1.toml example/sec1.toml --peer-address 127.0.0.1:6331 -c example/consensus1.toml -s example/service1.toml -n

exonum-cryptocurrency-advanced generate-config example/common.toml example/pub2.toml example/sec2.toml --peer-address 127.0.0.1:6332 -c example/consensus2.toml -s example/service2.toml -n

exonum-cryptocurrency-advanced generate-config example/common.toml example/pub3.toml example/sec3.toml --peer-address 127.0.0.1:6333 -c example/consensus3.toml -s example/service3.toml -n

exonum-cryptocurrency-advanced generate-config example/common.toml example/pub4.toml example/sec4.toml --peer-address 127.0.0.1:6334 -c example/consensus4.toml -s example/service4.toml -n ```

Finalize configs:

```sh exonum-cryptocurrency-advanced finalize --public-api-address 0.0.0.0:8200 --private-api-address 0.0.0.0:8091 example/sec1.toml example/node1cfg.toml --public-configs example/pub1.toml example/pub2.toml example/pub3.toml example/pub_4.toml

exonum-cryptocurrency-advanced finalize --public-api-address 0.0.0.0:8201 --private-api-address 0.0.0.0:8092 example/sec2.toml example/node2cfg.toml --public-configs example/pub1.toml example/pub2.toml example/pub3.toml example/pub_4.toml

exonum-cryptocurrency-advanced finalize --public-api-address 0.0.0.0:8202 --private-api-address 0.0.0.0:8093 example/sec3.toml example/node3cfg.toml --public-configs example/pub1.toml example/pub2.toml example/pub3.toml example/pub_4.toml

exonum-cryptocurrency-advanced finalize --public-api-address 0.0.0.0:8203 --private-api-address 0.0.0.0:8094 example/sec4.toml example/node4cfg.toml --public-configs example/pub1.toml example/pub2.toml example/pub3.toml example/pub_4.toml ```

Run nodes:

```sh exonum-cryptocurrency-advanced run --node-config example/node1cfg.toml --db-path example/db1 --public-api-address 0.0.0.0:8200 --consensus-key-pass pass --service-key-pass pass

exonum-cryptocurrency-advanced run --node-config example/node2cfg.toml --db-path example/db2 --public-api-address 0.0.0.0:8201 --consensus-key-pass pass --service-key-pass pass

exonum-cryptocurrency-advanced run --node-config example/node3cfg.toml --db-path example/db3 --public-api-address 0.0.0.0:8202 --consensus-key-pass pass --service-key-pass pass

exonum-cryptocurrency-advanced run --node-config example/node4cfg.toml --db-path example/db4 --public-api-address 0.0.0.0:8203 --consensus-key-pass pass --service-key-pass pass ```

Install frontend dependencies:

```sh cd ../frontend

npm install ```

Build sources:

sh npm run build

Run the application:

sh npm start -- --port=8280 --api-root=http://127.0.0.1:8200

--port is a port for Node.JS app.

--api-root is a root URL of public API address of one of nodes.

Ready! Find demo at http://127.0.0.1:8280.

Tutorials

• Read the frontend tutorial to get detailed information about the interaction of the client with Exonum blockchain.

License

Cryptocurrency demo is licensed under the Apache License (Version 2.0). See LICENSE for details.