As both the Initia L1 and rollups are Cosmos SDK chains, they come with IBC support by default. While it is straightforward for the Initia L1 and rollups to communicate and facilitate token transfers through IBC, there are some issues and limitations when using IBC with rollups. To address these challenges, we designed the OPinit Framework.
The OPinit Framework is a comprehensive solution consisting of Cosmos SDK modules and bots that enable rollups to connect with the Initia L1 network using an optimistic rollup model. This framework provides essential features for the rollup:
Optimistic token bridge with a challenge period
L1 state finalization through output submission
Transaction batch submission to Celestia’s Data Availability layer
Enhanced Security through Enforced Withdrawal Period
Rollups, typically operated by a single sequencer, lack the native security of traditional Layer 1 blockchains. This model, while offering benefits, introduces significant risks if not properly managed. The OPinit Bridge addresses this vulnerability by implementing:
A 7-day finalization period for withdrawals
A challenge feature to detect and prevent malicious activities
Time buffer for detecting compromises and rolling back the L2 chain if necessary
This approach significantly reduces the risk of quick exploitation and asset theft, providing a crucial security layer for the Initia ecosystem.