RPC provider methods tracking issue (pre-FVM)

[lemmih]

Issue summary

The following RPC methods are necessary to be compatible with the glif.io public RPC provider (pre-FVM).

• Filecoin.ChainGetNode #4711
• Fix Filecoin.ChainGetPath RPC #4396
• Filecoin.ChainNotify - Implemented but hard to test.
• Filecoin.ChainPutObj Implement Filecoin.ChainPutObj #4471
• Filecoin.Discover #4712
• Filecoin.GasEstimateGasPremium #4713
• Filecoin.GasEstimateMessageGas #4714
• Filecoin.MinerGetBaseInfo - Implemented but flaky.
• Filecoin.MpoolGetNonce - Implemented but flaky on the Lotus side.
• Filecoin.MsigGetVested
• feat(rpc): implement Filecoin.MsigGetVested and Filecoin.MsigGetVestingSchedule #4304
• Fix Filecoin.StateCall RPC #4392
• Filecoin.StateDecodeParams - Difficult to implement.
• Filecoin.StateMarketBalance #4189
• Filecoin.StateMarketParticipants #4303
• Filecoin.StateReplay
• Filecoin.StateSectorGetInfo
• Filecoin.StateVerifierStatus feat(rpc): implement Filecoin.StateVerifierStatus #4319
• Filecoin.Web3ClientVersion #4166

Lotus documentation for the RPC methods: https://github.com/filecoin-project/lotus/blob/master/documentation/en/api-v1-unstable-methods.md

Other information and links