1.0 KiB
Sui Wormhole Core Bridge Design
State
The State object is created exactly once during the initialisation of the
contract. Normally, run-once functionality is implemented in the special init
function of a module (this code runs once, when the module is first deployed),
but this function takes no arguments, while our initialisation code does (to
ease deployment to different environments without recompiling the contract).
To allow configuring the state with arguments, it's initialised in the
init_and_share_state function, which also shares the state object. To ensure
this function can only be called once, it consumes a DeployerCapability object
which in turn is created and transferred to the deployer in the init function.
Since init_and_share_state consumes this object, it won't be possible to call
it again.
Dynamic fields
TODO: up to date notes on where and how we use dynamic fields.
Epoch Timestamp
Sui currently does not have fine-grained timestamps, so we use
tx_context::epoch(ctx) in place of on-chain time in seconds.