  Tezos is a blockchain launched in June 2018. It is written in OCaml and
supports smart contracts. Its smart contract language is called Michelson and
it has been designed with formal verification in mind. In this article, we
present Mi-Cho-Coq, a Coq framework for verifying the functional correctness of
Michelson smart contracts. As a case study, we detail the certification of a
Multisig contract with the Mi-Cho-Coq framework.

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