Impossible Finance has officially decided to use Wormhole as the main bridging method. Users with IDIA in Arbitrum can exchange their Multichain-bridged IDIA for the new Wormhole-bridged IDIA. This exchange can be done at IF swap, trading tokens 1 to 1 without any fee. Check how to do this on our blog article below: https://blog.impossible.finance/arbitrum-idia-migration/