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Author: Admin | 2025-04-28
Communicates with the Cosmos Hub through IBC. In this way, the Cosmos Hub is able to keep up with the state of each zone while maintaining the global invariance of the total amount of each token across the zones. Tokens can be held by individual users or by zones themselves, and can be moved from one zone to another using a special IBC packet called a ‘coin packet’. Transactions involving coin packets must be committed by the sender, hub, and receiver blockchains to maintain security and integrity.While each zone in the Cosmos network can be a Tendermint blockchain that is secured by a small number of validators, the Cosmos Hub must be secured by a globally decentralised set of validators that can withstand severe attack scenarios, such as a continental network partition or a nation state-sponsored attack. The security of the Cosmos Hub is therefore of paramount importance. ATOM, the native token of the Cosmos Hub, may be staked by validators of a zone connected to the Hub, and double-spend attacks on these zones would result in the slashing of ATOMs with Tendermint’s fork accountability. However, it is the responsibility of users to send tokens to zones that they trust as the Cosmos Hub does not verify or execute transactions committed on other zones. A Cosmos zone is an independent blockchain that can be designated as a source of one or more token types, granting it the power to inflate that token supply. From the perspective of the Cosmos Hub, a zone can be classified as a multi-signature account with dynamic membership that can send and receive tokens using IBC packets. Similar to a cryptocurrency account, azone cannot transfer more tokens than it has, yet can receive tokens from others who have them. In the future, the Cosmos Hub’s governance system may pass improvement proposals that account for zone failures, such as outbound token transfers from some (or all) zones being throttled to allow for the emergency circuit-breaking of zones when an attack is detected.Cosmos Software Development Kits (SDKs)The Cosmos SDK is a versatile framework designed to simplify the development of layer 1 blockchains. At its core, the SDK provides a boilerplate implementation of the application blockchain interface (ABCI) in Golang, allowing developers to build state machines with maximum flexibility. A state machine is a computer that can hold multiple states but only one uniform state at any given time.
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