more rpc APIs. (#863)

* added readme

* more RPC APIs

* update for comments; fix travis issues

* update auto-generated host_mock.go

accounts/abi/bind/backends/simulated.go

@@ -240,7 +240,7 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
 
 	// Determine the lowest and highest possible gas limits to binary search in between
 	var (
-		lo  uint64 = params.TxGas - 1
+		lo  = params.TxGas - 1
 		hi  uint64
 		cap uint64
 	)

core/api_backend.go

@@ -105,3 +105,8 @@ func (b *HmyAPIBackend) CurrentBlock() *types.Block {
 func (b *HmyAPIBackend) AccountManager() *accounts.Manager {
 	return b.accountManager
 }
+
+// GetReceipts ...
+func (b *HmyAPIBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
+	return b.blockchain.GetReceiptsByHash(hash), nil
+}

internal/hmyapi/README.md

@@ -0,0 +1,100 @@
+# JSON RPC
+
+## JSSDK
+[FireStack-Lab/Harmony-sdk-core](https://github.com/FireStack-Lab/Harmony-sdk-core)
+
+## JSON-RPC methods
+
+### Network info related
+* [ ] net_listening - check if network is connected
+* [x] hmy_protocolVersion - check protocol version
+* [ ] net_version - get network id
+* [ ] net_peerCount - peer count
+
+### BlockChain info related
+* [ ] hmy_gasPrice - return min-gas-price
+* [ ] hmy_estimateGas - calculating estimate gas using signed bytes
+* [ ] hmy_blockNumber - get latest block number
+* [x] hmy_getBlockByHash - get block by block hash
+* [x] hmy_getBlockByNumber
+* [ ] hmy_getUncleByBlockHashAndIndex - get uncle by block hash and index number
+* [ ] hmy_getUncleByBlockNumberAndIndex - get uncle by block number and index number
+* [ ] hmy_getUncleCountByBlockHash - get uncle count by block hash
+* [ ] hmy_getUncleCountByBlockNumber - get uncle count by block number
+* [ ] hmy_syncing - Returns an object with data about the sync status 
+* [ ] hmy_coinbase - return coinbase address
+* [ ] hmy_mining - return if mining client is mining
+* [ ] hmy_hashrate - return current hash rate for blockchain
+
+
+### Account related
+* [x] hmy_getBalance - get balance for account address
+* [x] hmy_getTransactionCount - get nonce for account address
+* [ ] hmy_accounts - return accounts that lives in node
+
+### Transactions related
+* [ ] hmy_getTransactionReceipt - get transaction receipt by given transaction hash
+* [ ] hmy_sendRawTransaction - send transaction bytes(signed) to blockchain
+* [ ] hmy_sendTransaction - send transaction object(with signature) to blockchain
+* [x] hmy_getBlockTransactionCountByHash - get transaction count of block by block hash
+* [x] hmy_getBlockTransactionCountByNumber - get transaction count of block by block number
+* [x] hmy_getTransactionByHash  - get transaction object of block by block hash
+* [x] hmy_getTransactionByBlockHashAndIndex  - get transaction object of block by block hash and index number
+* [x] hmy_getTransactionByBlockNumberAndIndex - get transaction object of block by block number and index number
+* [ ] hmy_sign - sign message using node specific sign method.
+
+### Contract related
+* [ ] hmy_call - call contract method 
+* [x] hmy_getCode - get deployed contract's byte code 
+* [x] hmy_getStorageAt - get storage position at a given address
+* ~~[ ] hmy_getCompilers~~ - DEPRECATED
+* ~~[ ] hmy_compileLLL~~ - DEPRECATED
+* ~~[ ] hmy_compileSolidity~~ - DEPRECATED
+* ~~[ ] hmy_compileSerpent~~ - DEPRECATED
+
+### Subscribes
+* [ ] hmy_pendingTransactions - pending transaction subscriber
+* [ ] hmy_getLogs - log subscriber
+* [ ] hmy_newFilter -  creates a filter object, based on filter options
+* [ ] hmy_newBlockFilter - creates a filter in the node, to notify when a new block arrives
+* [ ] hmy_newPendingTransactionFilter - creates a filter in the node, to notify when new pending transactions arrive
+* [ ] hmy_getFilterChanges - polling method for a filter
+* [ ] hmy_getFilterLogs - returns an array of all logs matching filter with given id.
+* [ ] hmy_uninstallFilter - uninstalls a filter with given id
+
+
+### Others, not very important for current stage of work
+* [ ] web3_clientVersion
+* [ ] web3_sha3
+* [ ] hmy_getWork
+* [ ] hmy_submitWork
+* [ ] hmy_submitHashrate
+* [ ] hmy_getProof
+* [ ] db_putString
+* [ ] db_getString
+* [ ] db_putHex
+* [ ] db_getHex
+* [ ] shh_post
+* [ ] shh_version
+* [ ] shh_newIdentity
+* [ ] shh_hasIdentity
+* [ ] shh_newGroup
+* [ ] shh_addToGroup
+* [ ] shh_newFilter
+* [ ] shh_uninstallFilter
+* [ ] shh_getFilterChanges
+* [ ] shh_getMessages
+
+
+
+
+
+
+
+
+
+
+
+
+
+

internal/hmyapi/backend.go

@@ -9,6 +9,12 @@ import (
 func GetAPIs(b *core.HmyAPIBackend) []rpc.API {
 	nonceLock := new(AddrLocker)
 	return []rpc.API{
+		{
+			Namespace: "hmy",
+			Version:   "1.0",
+			Service:   NewPublicHarmonyAPI(b),
+			Public:    true,
+		},
 		{
 			Namespace: "hmy",
 			Version:   "1.0",
@@ -19,6 +25,11 @@ func GetAPIs(b *core.HmyAPIBackend) []rpc.API {
 			Version:   "1.0",
 			Service:   NewPublicTransactionPoolAPI(b, nonceLock),
 			Public:    true,
+		}, {
+			Namespace: "hmy",
+			Version:   "1.0",
+			Service:   NewPublicAccountAPI(b.AccountManager()),
+			Public:    true,
 		},
 	}
 }

internal/hmyapi/harmony.go

@@ -1,6 +1,9 @@
 package hmyapi
 
 import (
+	"context"
+	"math/big"
+
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/harmony-one/harmony/api/proto"
 	"github.com/harmony-one/harmony/core"
@@ -9,7 +12,12 @@ import (
 // PublicHarmonyAPI provides an API to access Harmony related information.
 // It offers only methods that operate on public data that is freely available to anyone.
 type PublicHarmonyAPI struct {
-	b *core.BlockChain
+	b *core.HmyAPIBackend
+}
+
+// NewPublicHarmonyAPI ...
+func NewPublicHarmonyAPI(b *core.HmyAPIBackend) *PublicHarmonyAPI {
+	return &PublicHarmonyAPI{b}
 }
 
 // ProtocolVersion returns the current Harmony protocol version this node supports
@@ -25,6 +33,12 @@ func (s *PublicHarmonyAPI) ProtocolVersion() hexutil.Uint {
 // - pulledStates:  number of state entries processed until now
 // - knownStates:   number of known state entries that still need to be pulled
 func (s *PublicHarmonyAPI) Syncing() (interface{}, error) {
-	// TODO(ricl): port
+	// TODO(ricl): find our Downloader module for syncing blocks
 	return false, nil
 }
+
+// GasPrice returns a suggestion for a gas price.
+func (s *PublicHarmonyAPI) GasPrice(ctx context.Context) (*hexutil.Big, error) {
+	// TODO(ricl): add SuggestPrice API
+	return (*hexutil.Big)(big.NewInt(1)), nil
+}

internal/hmyapi/net.go

@@ -1,22 +1,29 @@
 package hmyapi
 
 import (
+	"fmt"
+
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/ethereum/go-ethereum/p2p"
+	"github.com/harmony-one/harmony/p2p"
 )
 
 // PublicNetAPI offers network related RPC methods
 type PublicNetAPI struct {
-	net            *p2p.Server
-	networkVersion uint64
+	net       p2p.Host
+	networkID uint64
 }
 
 // NewPublicNetAPI creates a new net API instance.
-func NewPublicNetAPI(net *p2p.Server, networkVersion uint64) *PublicNetAPI {
-	return &PublicNetAPI{net, networkVersion}
+func NewPublicNetAPI(net p2p.Host, networkID uint64) *PublicNetAPI {
+	return &PublicNetAPI{net, networkID}
 }
 
 // PeerCount returns the number of connected peers
 func (s *PublicNetAPI) PeerCount() hexutil.Uint {
-	return hexutil.Uint(s.net.PeerCount())
+	return hexutil.Uint(s.net.GetPeerCount())
+}
+
+// NetworkID ...
+func (s *PublicNetAPI) NetworkID() string {
+	return fmt.Sprintf("%d", 1) // TODO(ricl): we should add support for network id (https://github.com/ethereum/wiki/wiki/JSON-RPC#net_version)
 }

internal/hmyapi/public_account.go

@@ -0,0 +1,28 @@
+package hmyapi
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/harmony-one/harmony/accounts"
+)
+
+// PublicAccountAPI provides an API to access accounts managed by this node.
+// It offers only methods that can retrieve accounts.
+type PublicAccountAPI struct {
+	am *accounts.Manager
+}
+
+// NewPublicAccountAPI creates a new PublicAccountAPI.
+func NewPublicAccountAPI(am *accounts.Manager) *PublicAccountAPI {
+	return &PublicAccountAPI{am: am}
+}
+
+// Accounts returns the collection of accounts this node manages
+func (s *PublicAccountAPI) Accounts() []common.Address {
+	addresses := make([]common.Address, 0) // return [] instead of nil if empty
+	for _, wallet := range s.am.Wallets() {
+		for _, account := range wallet.Accounts() {
+			addresses = append(addresses, account.Address)
+		}
+	}
+	return addresses
+}

internal/hmyapi/transactionpool.go

@@ -132,3 +132,55 @@ func (s *PublicTransactionPoolAPI) SendRawTransaction(ctx context.Context, encod
 	}
 	return SubmitTransaction(ctx, s.b, tx)
 }
+
+// GetTransactionReceipt returns the transaction receipt for the given transaction hash.
+func (s *PublicTransactionPoolAPI) GetTransactionReceipt(ctx context.Context, hash common.Hash) (map[string]interface{}, error) {
+	tx, blockHash, blockNumber, index := rawdb.ReadTransaction(s.b.ChainDb(), hash)
+	if tx == nil {
+		return nil, nil
+	}
+	receipts, err := s.b.GetReceipts(ctx, blockHash)
+	if err != nil {
+		return nil, err
+	}
+	if len(receipts) <= int(index) {
+		return nil, nil
+	}
+	receipt := receipts[index]
+
+	var signer types.Signer = types.FrontierSigner{}
+	if tx.Protected() {
+		signer = types.NewEIP155Signer(tx.ChainID())
+	}
+	from, _ := types.Sender(signer, tx)
+
+	fields := map[string]interface{}{
+		"blockHash":         blockHash,
+		"blockNumber":       hexutil.Uint64(blockNumber),
+		"transactionHash":   hash,
+		"transactionIndex":  hexutil.Uint64(index),
+		"from":              from,
+		"to":                tx.To(),
+		"shardID":           tx.ShardID(),
+		"gasUsed":           hexutil.Uint64(receipt.GasUsed),
+		"cumulativeGasUsed": hexutil.Uint64(receipt.CumulativeGasUsed),
+		"contractAddress":   nil,
+		"logs":              receipt.Logs,
+		"logsBloom":         receipt.Bloom,
+	}
+
+	// Assign receipt status or post state.
+	if len(receipt.PostState) > 0 {
+		fields["root"] = hexutil.Bytes(receipt.PostState)
+	} else {
+		fields["status"] = hexutil.Uint(receipt.Status)
+	}
+	if receipt.Logs == nil {
+		fields["logs"] = [][]*types.Log{}
+	}
+	// If the ContractAddress is 20 0x0 bytes, assume it is not a contract creation
+	if receipt.ContractAddress != (common.Address{}) {
+		fields["contractAddress"] = receipt.ContractAddress
+	}
+	return fields, nil
+}

p2p/host.go

@@ -14,6 +14,7 @@ type Host interface {
 	AddPeer(*Peer) error
 	GetID() libp2p_peer.ID
 	GetP2PHost() libp2p_host.Host
+	GetPeerCount() int
 
 	//AddIncomingPeer(Peer)
 	//AddOutgoingPeer(Peer)

p2p/host/hostv2/hostv2.go

@@ -209,6 +209,11 @@ func (host *HostV2) GetP2PHost() libp2p_host.Host {
 	return host.h
 }
 
+// GetPeerCount ...
+func (host *HostV2) GetPeerCount() int {
+	return host.h.Peerstore().Peers().Len()
+}
+
 // ConnectHostPeer connects to peer host
 func (host *HostV2) ConnectHostPeer(peer p2p.Peer) {
 	ctx := context.Background()