Governance Demo

For Governance, please refer to this branch governance_integration.

Substrate Storage Migration Demo

For Substrate Storage Migration, please refer to this branch Substrate Storage Migration.

Substrate based Product Barcode Scanner

This substrate based pallet scans 2D barcode of the product which is tied to a Blockchain system.

Getting Started

Rust Setup

Follow the Rust setup instructions before using the included Makefile to build the Node Template.

Makefile

This project uses a Makefile to document helpful commands and make it easier to execute them. Get started by running these make targets:

1. make init - Run the init script to configure the Rust toolchain for WebAssembly compilation.
2. make run - Build and launch this project in development mode.

The init script and Makefile both specify the version of the Rust nightly compiler that this project depends on.

Build

The make run command will perform an initial build. Use the following command to build the node without launching it:

make build

Embedded Docs

Once the project has been built, the following command can be used to explore all parameters and subcommands:

./target/release/node-template -h

Run

The make run command will launch a temporary node and its state will be discarded after you terminate the process. After the project has been built, there are other ways to launch the node.

Single-Node Development Chain

This command will start the single-node development chain with persistent state:

./target/release/node-template --dev

Purge the development chain's state:

./target/release/node-template purge-chain --dev

Run with Instant-Seal consensus

If you want to avoid creating empty blocks and allow only when a new transaction arrives, you can run below command.

./target/release/node-template --dev --instant-sealing

How to add product and verify barcode

• After executing make run, Use this link to open the Polkadot JS Apps UI https://polkadot.js.org/apps/#/explorer?rpc=ws://127.0.0.1:9944

• Open Extrinsics and fill following inputs to add the product in storage.

• 

• Click on Submit Transaction and product will be added.

• Open terminal and execute below curl request to verify barcode

curl -H "Content-Type: application/json" -d '{"id":1, "jsonrpc":"2.0", "method": "barcode_scanner_is_valid_barcode", "params": ["0x5c0d1176a568c1f92944340dbfed9e9c530ebca703c85910e7164cb7d1c9e47b"]}' http://localhost:9933/

You will get below response.

{"jsonrpc":"2.0","result":true,"id":1}

Run Benchmarking

Run make benchmark command and execute ./target/release/node-template benchmark --chain=dev --execution=wasm --wasm-execution=compiled --pallet=pallet_barcode_scanner --extrinsic='*' --steps=50 --repeat=20 --heap-pages=4096 --template=./frame-weight-template.hbs --output=./pallets/barcode-scanner/src/weights.rs