Hedera Hashgraph HBAR: Testnet v.0.15.0 Upgrade
A testnet is an alternative cryptocurrency blockchain, to be used for testing. Testnet coins are separate and distinct from real coins, and are not supposed to have any value. This allows application developers to experiment without resorting to using real coins and not worrying about the integrity and security of the mainnet.
7 events related to testing of new functions
3 general events
3 hard forks
2 exchange events