1st Look: Arbitrum L2 rollups - use the bridge, trade on MCDEX, failing a lot (Arbiswap, Bancor)

Arbitrum is a L2 scaling solution for Ethereum from Off-chain Labs. It should make it extremely easy for developers to move apps to L2 since no new tooling is required. They just announced their Mainnet Beta so this was a perfect opportunity to get a very first taste of a rollup future. It didn't go completely smoothly...

The announcement: https://offchain.medium.com/introducing-arbitrum-one-our-mainet-beta-ed0e9b63b435
Arbitrum site: https://arbitrum.io/
Arbitrum's GitBook: https://developer.offchainlabs.com/docs/developer_quickstart
Bancor Implementation: https://bancor.arbitrum.io/
MCDEX implementation: https://arb.mcdex.io/ (the one I managed to get working)
Arbiswap implementation: https://swap.arbitrum.io/