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A set of examples for ink! smart contract language. Happy hacking!

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ink!

This repository contains a set of example contracts for ink!.

Have a look at the different examples to better understand how to use ink! to build your own Substrate smart contracts.

Can I add a new example here?

Please don't add them here, but create a Pull Request to the integration-tests/public folder in the ink! repository instead. The content of that folder is synchronized with this repository on new releases.

Preparation

For building the example smart contracts found in this folder you will need to have cargo-contract installed.

cargo install cargo-contract --force

We use the --force to update to the most recent cargo-contract version.

Build example contract and generate the contracts metadata

To build a single example and generate the contracts Wasm file, navigate to the root of the smart contract and run the following command:

cargo contract build

You should now have an optimized <contract-name>.wasm file, a metadata.json file and a <contract-name>.contract file in the target folder of your contract. The .contract file combines the Wasm and metadata into one file and can be used for instantiation.

Running front end dApp examples

  1. Install nodejs and then install pnpm npm install -g pnpm
  2. Install dependencies pnpm i
  3. Run each example with pnpm <contract-example-name>. e.g. pnpm flipper
  4. Visit http://localhost:5173 in your browser.

Commands

  • pnpm basic-contract-caller
  • pnpm contract-terminate
  • pnpm contract-transfer
  • pnpm erc20
  • pnpm erc721
  • pnpm flipper
  • pnpm incrementer

All examples are built with useink, a React hooks library built by the ink! team.

License

The examples in this folder are released into the public domain. We hope they help you build something great with ink!.

See the LICENSE file in this folder for more details.

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A set of examples for ink! smart contract language. Happy hacking!

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