v1 storage layout:
├──OwnerUpgradeable
├──AbacusConnectionClient
│ ├──IAbacusConnectionManager public abacusConnectionManager; <--|
│ ├──IInterchainGasPaymaster public interchainGasPaymaster; | 50 slots
│ └──uint256[48] private __GAP; <--|
|
├──mapping(uint32 => bytes32) public routers; <--|
| | 50 slots