Cosmos (ATOM) is a cryptocurrency that positions itself as a decentralized network of independent blockchains based on the Byzantine fault tolerance algorithm, a stable consensus algorithm that solves the problem of visionary generals, which activates the Proof–of-Stake of the Cosmos currency. These blockchains interact with each other through the Cosmos network and form an "Internet of Blockchains".

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1/ Since the inception of the Cosmos Hub, Cosmos SDK chains have adopted a similar mechanism to Ethereum for transaction replay protection and ordering. 

Namely, transaction senders are required to sign transactions over a monotonically increasing nonce.