Consensus layer specification

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Ethereum network started as a proof-of-work blockchain with the intention of switching to proof-of-stake after its bootstrap. The research produced a consensus mechanism combining Casper and GHOST, released in Gasper paper.

Based on its design, a specification was written in python. Pyspec is an executable specification that serves as a reference for consensus layer developers. It is also used as reference for client implementations and for creating the test case vectors for clients.

Resource

How to use Executable Consensus Pyspec by Hsiao-Wei Wang | Devcon Bogotá