Mainnet
a.k.a. Main network
A blockchain's live, real network, where transactions use real coins with real value.
In plain English
A blockchain's live, real network, where transactions use real coins with real value.
Mainnet is the real thing: the live blockchain where coins have actual value and mistakes cost actual money. It's the opposite of a testnet, a practice copy where coins are free and worthless.
A "mainnet launch" is when a project goes from rehearsal to opening night. It's a big milestone, though launches often reveal bugs that never showed up in testing.
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