# Glossary

This glossary collects key terms used across the KUB Docs.

## A

### Archive node

A node that stores the full block history of the KUB network

## B

### Block explorer

A tool for viewing blocks, transactions, accounts, tokens, and smart contracts on-chain

## C

### Chain ID

A unique network identifier that wallets and apps use to connect to the correct blockchain

## D

### dApp

A decentralized application that runs on a blockchain network

### Delegator

A participant who delegates KUB Coin to a validator or pool node

## E

### ERC

Ethereum Request for Comments. A standard used by Ethereum for tokens and smart contract interfaces

## F

### Fork

A protocol change that updates the rules of the network

### Full node

A node that validates network activity and serves chain data without producing blocks

## G

### Governance

The process used by the KUB community to discuss, approve, and adopt protocol and community changes

## H

### Hard fork

A protocol upgrade that is not backward-compatible with earlier node versions

## K

### KAP

KUB Application Protocol. A standard built for applications and tokens on the KUB network

### KAP-20

A fungible token standard on KUB. It supports features such as `adminTransfer`

### KAP-721

A non-fungible token standard on KUB for unique digital assets

### KAP-1155

A multi-token standard on KUB that supports fungible and non-fungible tokens in one contract

### KIP

KUB Improvement Proposal. A design document used to propose features, standards, and process changes for KUB

### KKUB

Wrapped KUB Coin. Used in wallet and token flows on the KUB network

### KUB

A rapid, secure, and high-performance Layer 1 blockchain network that is EVM-compatible

### KUB Bridge

The native bridge used to move supported assets between KUB and selected networks

### KUB Coin

The native coin of the KUB network. It is used for staking, fees, and network operations

### KUB Developer Center

A platform for submitting dApps to the KUB ecosystem and accessing developer resources

### KUB Faucet

A tool that dispenses free `tKUB` for testing on KUB Testnet

### KUB Layer 2

A Layer 2 network built on top of KUB to increase throughput and reduce costs

### KUB Mainnet

The live production network for KUB

### KUB Scan

The block explorer for KUB Mainnet and KUB Testnet

### KUB Testnet

The public testing network for KUB

### KUB Wallet

A wallet with native support for the KUB network

## L

### Layer 1

The base blockchain that provides the main consensus and settlement layer

### Layer 2

A secondary network built on top of a Layer 1 blockchain to improve scalability

## M

### Mainnet

A live blockchain environment that uses real assets

### MetaMask

An EVM-compatible wallet that can connect to KUB as a custom network

## N

### NEXT SDK

An SDK for integrating dApps with KUB Wallet for authentication, user data access, and blockchain transactions

### NFT

A non-fungible token that represents a unique digital asset

## O

### Official node

A node that steps in to create a block and trigger slashing when a validator misses its duties

### Optimistic rollup

A rollup model that assumes bundled transactions are valid unless challenged with a fraud proof

## P

### Pool node

A validator node that allows other users to delegate KUB Coin to it

### Proof-of-Authority (PoA)

A blockchain consensus mechanism that leverages validator reputation—rather than computational power or financial stake—to secure the network

### Proof-of-Stake (PoS)

KUB's consensus mechanism, where validators and delegators stake KUB Coin to help secure the network

### Proof-of-Stake-Authority (PoSA)

A hybrid blockchain consensus mechanism combining Proof of Stake (PoS) and Proof of Authority (PoA)

## R

### Rollup

A scaling method that bundles many transactions into one compressed transaction submitted to Layer 1

### RPC URL

The endpoint that wallets and apps use to connect to a blockchain network

## S

### Slashing

A penalty applied to validators that fail to perform their duties

### Slashing epoch

The tracking period used to measure validator performance for slashing

### Smart contract

Code deployed on the blockchain that runs automatically when called

### Soft fork

A backward-compatible protocol upgrade

### Span

A unit used by the KUB network to measure validator activity windows

### StakeManager

The core staking contract used for staking, unstaking, rewards, and validator configuration

### Staking

Depositing KUB Coin to activate a validator or participate in network validation

## T

### Testnet

A blockchain environment used for testing without real assets

### tKUB

The testnet version of KUB used on KUB test networks

## V

### Validator

A node or participant that validates transactions and helps secure the KUB network

### ValidatorShare

A contract that manages delegation, undelegation, and delegator rewards for a validator node

## W

### Web3 wallet

A wallet that can connect to blockchain networks and sign transactions

## Z

### ZK rollup

A rollup model that uses cryptographic proofs to verify bundled transactions


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