Welcome sub0 Hackathon participants!
This page contains all necessary info to participate in the sub0 HACK using ink! v6.
- The hackathon takes place from Nov 14 - Nov 16, 2025.
- $50,000 in prize money.
- Remote participation is fine!
🚑 Support
If you don't use Telegram, please create a GitHub issue here.
🤖 LLMs
We have an llms.txt that contains
all documentation from this website. If you copy/paste it into your
prompt/context window, this will help your AI friend a lot to provide help.
🚀 Fast Track
Install Rust (>= 1.88) 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 --version 6.0.0-beta 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/latest
# 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.
You need to use ink! v6.0.0-beta!
Prior releases of ink! are not supported for the hackathon! You won't be able to deploy them on Passet Hub.
Make sure your Cargo.toml contains
[dependencies]
ink = { version = "6.0.0-beta" }
[dev-dependencies]
ink_e2e = { version = "6.0.0-beta" }
# we moved the sandbox testing environment to a separate crate
# this one cannot be published to crates.io yet
ink_sandbox = { git = "https://github.com/use-ink/ink.git", branch = "6.0.0-beta" }
Your cargo-contract version must be 6.0.0-beta too:
cargo install --force --locked --version 6.0.0-beta cargo-contract
🚀 Where to deploy?
You can deploy locally via our local development node ink-node.
As a testnet you need to use Paseo Passet Hub. You can find the faucet here.
🏰 dApp Templates
We recommend using ink!athon to generate dApp templates that contain contract and frontend code.
You can find a hardcoded frontend for our flipper example here.
🤔 Smart Contract Examples
You can find many contract examples in 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
Calling Solidity contracts.
» view example