Welcome Polkadot Scalability Hackathon participants!
On this page we explain how you can participate with ink! v6.
Read more about the hackathon here.
You need to use ink! v6!
The current stable release of ink! (v5) is only compatible with WebAssembly and
pallet-contracts. With v6 we are transitioning to pallet-revive and PolkaVM.
pallet-revive is the execution environment for smart contracts on Kusama and
Polkadot AssetHub.
ink! v6 is not yet released. This means you have to install our tools from the GitHub
master branches and also depend on ink! master in your contracts Cargo.toml.
We did a writeup about this transition and the story behind it here. The chapter Technical Background of this documentation describes the larger architectural view.
For the documentation of ink! v6 you need to make sure you are viewing the v6 version:
If you already have an ink! v5 contract: there is a migration guide available here.
ink! v6 is still work in progress, there are still rough edges and possibly bugs.
You can find support in our Telegram group or open issues in our repositories.
Fast Track
Install Rust (>= 1.85) and cargo: Installation Guide.
Download the binary for a local development node here.
# Install our cli tool: `cargo-contract`.
# It wraps around Rust's `cargo build` to build contracts with optimal
# flags for blockchains. It also allows for deploying + interacting
# with contracts.
$ rustup component add rust-src
$ cargo install --locked --force --git https://github.com/use-ink/cargo-contract
# Create a simple contract.
$ cargo contract new flipper && cd flipper
$ cargo contract build --release
# Download our local development node.
# Find the binary here: https://github.com/use-ink/ink-node/releases/tag/v0.43.0
# Start your local development node in a separate shell session
$ ink-node
# Instantiate your contract on-chain.
$ cargo contract instantiate --suri //Alice
# Dry-run a call of it.
$ cargo contract call --suri //Alice --contract 0x… --message get
# Execute a contract call, as a transaction on-chain.
$ cargo contract call --suri //Alice --contract 0x… --message flip -x
Please see the chapter Getting started of this documentation for a deeper introduction.
Smart Contract Examples
You can find many contract examples in
the v6 branch of our ink-examples repository.
Our "Hello, World!".
» view example
An ERC-20 implementation.
» view example
An upgradeable contract.
» view example
A multi-signature wallet.
» view example
Allow runtime access.
» view example