Support a cosmos-sdk friendly eth msg

[yihuang]

Proposal: Support a cosmos-sdk friendly eth msg

Current behavior:

Currently to keep it compatible with ethereum APIs, the MsgEthereumTx need many customization to work:

• Not signing the wrapping cosmos tx, and enforce most of the fields to be empty.
• custom ante handler pipeline.
• custom gas deduction/refund logic.

It makes it hard to apply some cosmos-sdk features on eth tx, notably:

• Transaction Tips
• Execute EVM tx in ICA-host chain.

Desired behavior: Implement an alternative cosmos-sdk friendly eth msg

gas price/gas limit, signatures will be specified in the tx structure.

message MsgEthereum {
  string sender = 1;
  string to = 2;
  string value = 3;
  bytes data = 4;
  repeated AccessTuple accesses = 5;
}

How to blend into the JSON-RPC apis:

• How to fake an eth tx hash
• In batch mode, there's only one set of gas price/gas limit in cosmos tx, but eth APIs would expect one for each msg.

Use case:

Support transaction tips and ICA host.

[github-actions]

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[itsdevbear]

@yihuang bump related to #1363 and would likely solve the problem.

[yihuang]

@yihuang bump related to #1363 and would likely solve the problem.

I think it's a different case, it's about executing evm contract in cosmos ecosystem, like in ICA-host chain, or utilize the cosmos-sdk tx features, like transaction tips, authz, new gov proposals.