Mitsuaki Uchimoto

### Description Currently the `size` property of regular merkle tree uses type `number`. To account for new interoperability specs it should be updated to `bigint`. ### Acceptance Criteria - Update...

### Expected behavior Value in `ownchainStore` in interoperability module should be `chainID` not `id` as according to LIP ### Actual behavior Is `id` ### Steps to reproduce Check source code...