Overview
Cardano Partner Chains is a framework from Input Output designed to let teams launch their own independent blockchains without building a security network from scratch. A new chain borrows experienced block producers from an established network instead of recruiting its own. This listing links to the original announcement article, which explains why the framework exists and what problems it set out to solve1.
Input Output founder Charles Hoskinson presented the plan at the Cardano Summit. Each partner chain runs its own logic for apps and transactions but relies on Cardano as its settlement layer and on Cardano stake pool operators (the people who run the servers that produce Cardano blocks) for security1. The framework was first released as an alpha (early test) version of open-source code called the Partner Chains Toolkit2. That standalone toolkit is archived and read-only, and partner chain development continues as part of the Midnight node software3.
Key Features
- Security from experienced operators. Cardano stake pool operators can register to produce blocks on a partner chain, so a new network can gain validators with a proven record of securing Cardano4.
- A gradual path from trusted to open. A setting called the D parameter controls the share of blocks made by hand-picked validators versus openly registered ones, so a chain can start tightly controlled and open up step by step4.
- A fresh set of block producers each epoch. An algorithm called Ariadne picks a new mix of validators for each epoch (a fixed period on the network), reading the candidate list and settings from Cardano4.
- Built from shared parts. The framework extends Substrate, an open-source blockchain framework from Parity Technologies, with trustless integration to Cardano and a set of add-on modules called pallets1.
- Treasury and governance tools. The toolkit includes a token reserve held on Cardano, a reward system for block producers and delegators, and multi-signature governance where a set number of named authorities must approve changes3.
What to Expect
The link opens Input Output's short announcement article. It explains how Cardano separates its settlement layer (where final balances are recorded) from its computation layer (where apps run), and how partner chains build their own computation layer while still settling on Cardano1. The article presents some ideas, such as Babel fees (paying network fees in tokens other than the native coin) and trustless bridges between chains (links that move tokens without relying on a middleman), as plans for the framework1.
The article named Midnight, a data-protection blockchain, as the first chain to use the framework1. The Midnight node is integrated with Cardano as a partner chain and includes a bridge for moving tokens from Cardano to Midnight5.
Developers who want the technical detail can read the toolkit documentation on GitHub, which covers running the supporting Cardano software, registering as a validator, and step-by-step setup wizards4. Building a new chain with it calls for experience with the Rust programming language, Cardano tools and Polkadot tools3. Because the standalone repository is archived, anyone looking for maintained code should start from the Midnight node repository, where partner chain support sits inside the core software5.
