The Public Testnet is a preview of what the LikeCoin FoTan Mainnet will be.
The Testnet aims to provide a platform for validators to have rehearsal on upgrading the chain to FoTan. The main goal is to let validators get used to the upgrade procedures, so the upgrade of Mainnet can be more fluent. It also helps to discover software issues early before the Mainnet upgrade.
The Testnet also acts as a platform for developers to test chain features and APIs and could be reused in future upgrades for rehearsal.
To set up a completely new chain starting from block 1 while preserving necessary data
Chain data: application state (balance, delegations, ...)
blocks and transactions are abandoned and aggregated into one final state for genesis
Validator's personal data: private keys, address books, node config files
The snapshot at a certain time which validators have consensus (e.g. 2021-01-01 00:00:00 UTC)
Such consensus would be determined by the proposal
Changing the chain ID, so old chain transactions could not be replayed
Parameters for new modules
ISCN registry name
ISCN fee per byte
Default states for new modules
e.g. ISCN records (an empty list since there is no previous records)
Some differences from old software to new software
e.g. genesis format changes in accounts
handled by the migration software
Export by old chain software
Then migrated to by new chain software
Input new chain ID and parameters
Also input the new genesis time