RPC for staking txns and txns history queries

[denniswon]

Issue

NOTE: This PR is rebased on my other PR #2553.

#2227
#2346

Test

~/go/src/github.com/harmony-one/harmony (stakingtxn_history) $ go test ./core/rawdb
ok github.com/harmony-one/harmony/core/rawdb

Test/Run Logs

Run local network with explorer node, make a query to its rpc query endpoint, and verify that getStakingTransactionsHistory() RPC returns the correct history of staking txns of an account.

Operational Checklist

Requires rolling update. Other than this, not much risk involved/foreseen.

[denniswon]

Note. With force push above, #2553 has been merged to this pr. @gupadhyaya I made the changes based on your review on that pr here on commit
58e8692.

[stephen-tse]

@rlan35 is this pr blocking stake heist? if so, let's expedite the review and merge? cc @LeoHChen

[denniswon]

@gupadhyaya updated per review.

[denniswon]

{"level":"debug","port":"9000","ip":"18.144.51.20","blockHeight":2827,"caller":"/home/ubuntu/harmony-one/harmony/node/node_explorer.go:         109",
"time":"2020-03-31T01:10:36.033816346Z","message":"[Explorer] Adding new block for explorer node"}                                   30259 
{"level":"error","port":"9000","ip":"18.144.51.20","caller":"/home/ubuntu/harmony-one/harmony/core/blockchain.go:1530",
"time":"2020-03-         31T01:10:36.034274485Z","message":"\n########## BAD BLOCK #########\nChain config: {ChainID: 3 EIP155: 0 CrossTx: 0 Staking: 2                  CrossLink: 2 ReceiptLog: 0}\n\nNumber: 2827\nEpoch: 74\nNumTxn: 0\nNumStkTxn: 0\nHash:                                                          0x638ffb055fb76dbfb00359eaa1149c857245d18b2907b23238d62a1ccf43ecf4\n\n\nError: unknown ancestor\n##############################\n"}       30260 
{"level":"error","port":"9000","ip":"18.144.51.20","error":"unknown ancestor","caller":"/home/ubuntu/harmony-one/harmony/node/                  node_explorer.go:130","time":"2020-03-31T01:10:36.034290031Z","message":"[Explorer] Error when adding new block for explorer node"}       30261 
{"level":"info","port":"9000","ip":"18.144.51.20","blockNum":2827,"caller":"/home/ubuntu/harmony-one/harmony/node/node_explorer.go:140", 
"time":"2020-03-31T01:10:36.034322476Z","message":"[Explorer] Committing block into explorer DB"}
30262 {"level":"info","port":"9000","ip":"18.144.51.20","peer":{"Addrs":["/ip4/127.0.0.1/tcp/9000","/ip4/172.31.21.25/tcp/9000","/ip4/54.193.         17.25/tcp/9000"],"ID":"QmPF9b4xV6uUQcf3RQJanv2Z32BuWPWFNXRpv6t2Lq8fmZ"},"caller":"/home/ubuntu/harmony-one/harmony/api/service/networkinfo/service.go:237","time":"2020-03-31T01:10:36.056615722Z","message":"connected to peer node"}
30263 {"level":"info","port":"9000","ip":"18.144.51.20","peer":{"IP":"54.193.17.25","Port":"9000","ConsensusPubKey":null,"Addrs":["/ip4/127.0.        0.1/tcp/9000","/ip4/172.31.21.25/tcp/9000","/ip4/54.193.17.25/tcp/9000"],
"PeerID":"QmPF9b4xV6uUQcf3RQJanv2Z32BuWPWFNXRpv6t2Lq8fmZ"},"caller":"/home/ubuntu/harmony-one/harmony/api/service/networkinfo/service.go:255","time":"2020-03-31T01:10:36.056673469Z","message":"Notify peerChan"}

But I do see the new rpcs getting called correctly

{"level":"info","port":"9000","ip":"18.144.51.20","caller":"/home/ubuntu/harmony-one/harmony/node/node_explorer.go:185","time":"2020-03-        31T01:11:05.817062947Z","message":"[explorer] getstakingtransactionshistory"}                                                             30446 {"level":"error","port":"9000","ip":"18.144.51.20","error":"leveldb: not found","caller":"/home/ubuntu/harmony-one/harmony/node/                node_explorer.go:191","time":"2020-03-31T01:11:05.817096039Z","message":"[Explorer] Cannot get storage db instance"}                      30447 
....
 30452 {"level":"info","port":"9000","ip":"18.144.51.20","caller":"/home/ubuntu/harmony-one/harmony/node/node_explorer.go:185","time":"2020-03-        31T01:11:07.0790898Z","message":"[explorer] getstakingtransactionshistory"}                                                               30453 {"level":"error","port":"9000","ip":"18.144.51.20","error":"leveldb: not found","caller":"/home/ubuntu/harmony-one/harmony/node/                node_explorer.go:191","time":"2020-03-31T01:11:07.079125703Z","message":"[Explorer] Cannot get storage db instance"}   

On my own explorer node, having some trouble inserting new blocks to the db

[denniswon]

if !node.Consensus.Decider.IsQuorumAchievedByMask(mask) {
			utils.Logger().Error().Msg("[Explorer] not have enough signature power")
			return
		}

I also see this when my explorer node is syncing.

cc: @fxfactorial any idea by chance?

[UPDATE] Resolved later during syncing. I guess this happens after hard refresh when not enough nodes are there on the network.

[gupadhyaya]

@denniswon could you please fix the Jenkins build?

[denniswon]

@gupadhyaya jenkins has been disabled.

[denniswon]

@gupadhyaya reverted the apiv1 change in transactionpool and jenkins/travis all passed. final review to be merged so that this pr can be included in tmrw's ostn upgrade.

[gupadhyaya]

LGTM.