Problem: json-rpc don't cover all on-chain activities (or full precompile coverage)

[yihuang]

One major issue for the current ecosystem is the json-rpc don't provide full view for all the on-chain activities, notably the cross-chain transactions go through ibc, for example the web3 explorers don't show the full transaction history of accounts.

One solution is wrapping all the native functionalities using precompiles, and enforce all the transactions to be evm transactions. It'll fully unify all the user interface in ethereum way, only ethereum wallet and ethereum transactions are allowed, json-rpc will have complete view of the chain activities.

The main chanlleges:

• wrap all cosmos-sdk messages, and keep it up-to-date.

  • One solution is simply accept the protobuf encoded message as input, pass that directly to native handlers. In this way, it's trivial to support all messages, but the UX is not very friendly to user or contract calls.
  • The other solution is develop some toolings to convert the protobuf message definitions to solidity structs and methods automatically, not sure how hard or feasible this will be.

• Adapt cosmos-sdk ecosystem tools to it, notably the ibc relayers, so they send evm txs instead of cosmos ones.

  • We've already done some work with go-relayer (by @mmsqe, go-relayer fork)