* ethereum: add optimism testnet
* sdk/js: add optimism testnet
* ethereum: put back network id
* Revert "ethereum: put back network id"
This reverts commit 71f68c50d2.
* ethereum: put back network id
* ethereum: file cleanup
Added a `uint256 evmChainId` state variable to the Core, Token and NFT Bridge
contracts. `evmChainId` is compared to `block.chainid` in the `chainId`
function. When they don't match, a "bad fork" Chain ID is returned,
otherwise the Wormhole Chain ID is returned.