Ethereum JSON-RPC facade

[aakoshh]

Implement a separate process and container to act as an API facade that Ethereum tools work with.

Useful links:

• https://ethereum.org/en/developers/docs/apis/json-rpc/
• https://docs.ethermint.zone/basics/json_rpc.html
• https://docs.ethermint.zone/guides/ for tool integration
• https://github.com/gakonst/ethers-rs/tree/master/ethers-providers has DTOs we can use for a Rust implementation
• Ethermint using geth DTOs and get server
• Lotus Full API containing Ethereum parts
• Lotus API implementation https://github.com/filecoin-project/lotus/blob/master/node/impl/full/eth.go
• Lotus DTOs https://github.com/filecoin-project/lotus/tree/master/chain/types/ethtypes
• Ethermint API interface
• Ethermint API implementations
• Ethermint sing_tx and query_client
• Ethermint API backend registration
• ABCI Queries to support the API
• Lotus implementation of eth_sendRawTransaction which deals with signed transactions; they don't implement eth_sendTransaction which would sign on behalf of the caller

Progress

• eth_accounts
• eth_blockNumber
• eth_call
• eth_chainId,
• eth_coinbase
• eth_compileLLL
• eth_compileSerpent
• eth_compileSolidity
• eth_estimateGas
• eth_feeHistory
• eth_gasPrice
• eth_getBalance
• eth_getBlockByHash
• eth_getBlockByNumber
• eth_getBlockTransactionCountByHash
• eth_getBlockTransactionCountByNumber
• eth_getBlockTransactionReceipts
• eth_getCode
• eth_getCompilers
• eth_getFilterChanges
• eth_getFilterLogs
• eth_getLogs
• eth_getStorageAt
• eth_getTransactionByBlockHashAndIndex
• eth_getTransactionByBlockNumberAndIndex
• eth_getTransactionByHash
• eth_getTransactionCount,
• eth_getTransactionReceipt
• eth_getUncleByBlockHashAndIndex,
• eth_getUncleByBlockNumberAndIndex
• eth_getUncleCountByBlockHash
• eth_getUncleCountByBlockNumber
• eth_getWork
• eth_hashrate
• eth_mining
• eth_newBlockFilter
• eth_newFilter
• eth_newPendingTransactionFilter
• eth_protocolVersion
• eth_sendRawTransaction
• eth_sendTransaction
• eth_sign
• eth_signTransaction
• eth_submitHashrate
• eth_submitWork
• eth_syncing
• eth_uninstallFilter
• web3_sha3
• web3_clientVersion
• net_version
• net_listening
• net_peerCount
• eth_subscribe
• eth_unsubscribe