📎Technology Stack and Explanation of Terms

Here, we will provide a brief description of the technology stack of ME Network and offer some semantic explanations, with more detailed discussions to follow in subsequent sections.

ME-Tendermint: ME Network's consensus algorithm is improved and optimized on the basis of Tendermint.

PPoS: The Permitted Proof of Stake used by ME Network, that is, the validator node needs to obtain a permission.

MBC: Multi-Blockchain Communication Protocol, based on the Inter-Blockchain Communication (IBC) protocol from the Cosmos network, allowing communication and interoperability among various application chains.

Rollup: It is a Layer 2 scaling solution that improves throughput and operational efficiency of the Layer 1 network by moving transaction computation off-chain. In ME Network, Rollup is responsible for executing transactions and providing compressed transaction data for verification. This eliminates the need for deploying a separate set of validation nodes, as their security is ensured by the underlying Data Availability and Consensus Layers of ME Network.

Sequencer: A sequencer that focuses on collecting user transactions and processing them in batches.

ME Hub: The settlement and state verification consensus layer of the ME Network. It is an independent blockchain network capable of executing a virtual machine. ME Hub natively supports cross-chain communication through MBC for Rollup-chains.

Rollup-chain: A second-layer chain, i.e., the execution layer of the ME Network. The ME Network's DA (Data Availability) layer ensures the validity of data, while the settlement layer handles disputes and serves as Layer1 for processing and settling cross-chain assets.

ME-SDK: A simple and easy-to-use blockchain development framework suite that includes various modules to help developers quickly customize, develop, and deploy Rollup-chains.

DID: Decentralized Identity identifier, usually refers to decentralized identity. Self-Sovereign Identity: Self-sovereignty Identity refers to a decentralized identity with

Self-sovereignty characteristics. It shares many similarities with Decentralized Identifiers (DID).

ME-DAO: ME-DAO refers to the decentralized autonomous organization within the Meta Earth ecosystem.

Validator: A Validator is a validating node responsible for verifying each transaction and maintaining the security of the distributed ledger.

Set of Validators: A Validator set is a collection of nodes selected from all nodes. This set of

Validators is responsible for determining the latest block.

Staking: Staking refers to the act of depositing tokens into a network to participate in its consensus mechanism. By staking tokens, participants can earn rewards.

Full Node: A full node is a node in a blockchain network that is responsible for downloading block headers and transaction lists. It plays a crucial role in maintaining the network's consensus.

DA Light Node: A light node, also known as a light client, is a node in a blockchain network that only downloads block headers instead of the entire data. It employs data availability sampling and can detect invalid blocks from the medium-term block producers.