Off-chain

Off-chain transactions that take place may later be reported or bundled together before being sent to the main chain.

Fiat

Fiat money, often known as fiat currency, is money that a government has recognized as legal tender and that it supports.

A mainnet is a separate blockchain that operates on its own network using its own protocol and technologies.

A marketing tactic known as a cryptocurrency airdrop involves giving away free tokens or coins to existing owners of a specific coin or token.