GRANDPA

GRANDPA (GHOST-based Recursive ANcestor Deriving Prefix Agreement), also previously known as SHAFT (SHared Ancestry Finality Tool), and originally known as AfG, is a finality gadget for blockchains, implemented in Rust.

​GRANDPA Block Finality in Polkadot: An Introduction (Part 1)​

Used in

• Polkadot is a blockchain for scalable decentralized computation and interoperability.

Whitepaper

• The formal specification is published at https://github.com/w3f/consensus/blob/master/pdf/grandpa.pdf​

Resources

The first implementation is underway in Rust at https://github.com/paritytech/finality-afg​