wip: support native ether

[hexyls]

Closes #676

Includes native asset support for ethereum (mainnet, rinkeby), sokol, and xdai.

xDAI
Replaces: #1464

PR does not include verification, we can add that later once the kleros/curate-xdai subgraph is up.

1. Add xDai as a new network to your wallet:
   Name: xDai
   RPC: https://rpc.xdaichain.com/
   Chain ID: 100
   Symbol: xDai
   Block explorer: https://blockscout.com/poa/xdai
2. Use https://bridge.xdaichain.com/ to convert dai on Ethereum to xDai
3. Use native xDai to fund/buy
4. Alternatively, send some xDai to the wrapped xDai address: 0xe91D153E0b41518A2Ce8Dd3D7944Fa863463a97d

[pimato]

Hey @hexyls can you include Ether into the UI so I can test it?

for the time being, we should include both tokens Ether/Wrapped Ether in the the asset balance dropdown so the users can do whatever they want. So only if the user picks native Ether, we need to go the gnosis safe batches all actions together route.

[hexyls]

Funding with native ether should work at this point but does not.

Some notes:

• contract-proxy-kit converts tx values to numbers which ethers.js does not like.
• In my tests I confirmed that once a proxy's implementation is upgraded to Gnosis Safe v1.2.0 you can successfully send ether to the proxy and wrap it in a single transaction.
• However as soon as the multisend contract is involved contract-proxy-kit will estimate that the transaction will revert.

Will continue to explore...

[hexyls]

Yep there is a problem with the MultiSend contract. Again it is the same issue that both Gnosis Safe v1.1.1 and the current Proxy factory have.

I deployed a new MultiSend contract on Rinkeby and was able to get multisend with ether wrapping working.

However the conversion of tx values to numbers in contract-proxy-kit is still a problem.

[hexyls]

Today I monkey patched the cpk library to fix the transaction value encoding issue.

Once this proposal passes to add / index WETH markets on Rinkeby we should be ready to test market creation in native ether. I have actually made a successful transaction that should have created a market but it was not indexed.

[kadenzipfel]

Great work!

[kadenzipfel]

Out of curiousity, is there any particular reason you capitalized the address like this?

[hexyls]

I copied this from the 0x Project I think 🤔 and this is the checksum of that address, for us we could use any value here though cause we don't use the address in any transactions.

resolved

[kadenzipfel]

LGTM!

[pimato]

I found issues with the asset dropdown ( #1499 ) , but should be fixed in a separat PR! Looks good to me!

[Mi-Lan]

Looks good ! Tested xdai markets they work good, native eth works great also!

• I would suggest for the xDai instead of verify section having this error we hide the whole section for xDai this could be created as seprate issue so we publish this feature
  
• Also i found that multiple currencies on xDai don't work, below is how it looks and I added xDai to it...
  

[Mi-Lan]

LGTM!