From 5244bb6d79fc118bfdabeb367b645608ea05003a Mon Sep 17 00:00:00 2001
From: Wei-Ning Huang <w@byzantine-lab.io>
Date: Mon, 7 Oct 2019 18:08:38 +0800
Subject: dex: add missing eth public API (#8)

---
 dex/api.go     | 31 +++++++++++++++++++++++++++++++
 dex/backend.go | 12 ++++++++++++
 2 files changed, 43 insertions(+)

(limited to 'dex')

diff --git a/dex/api.go b/dex/api.go
index 1209e6583..7ca1a4622 100644
--- a/dex/api.go
+++ b/dex/api.go
@@ -22,6 +22,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math/big"
 	"os"
 	"strings"
 
@@ -38,6 +39,36 @@ import (
 	"github.com/tangerine-network/go-tangerine/trie"
 )
 
+// PublicEthereumAPI provides an API to access Ethereum full node-related
+// information.
+type PublicEthereumAPI struct {
+	dex *Tangerine
+}
+
+// NewPublicEthereumAPI creates a new Ethereum protocol API for full nodes.
+func NewPublicEthereumAPI(e *Tangerine) *PublicEthereumAPI {
+	return &PublicEthereumAPI{e}
+}
+
+// Etherbase is the address that mining rewards will be send to
+func (api *PublicEthereumAPI) Etherbase() (common.Address, error) {
+	return api.dex.Etherbase(), nil
+}
+
+// Coinbase is the address that mining rewards will be send to (alias for Etherbase)
+func (api *PublicEthereumAPI) Coinbase() (common.Address, error) {
+	return api.dex.Etherbase(), nil
+}
+
+// ChainId is the EIP-155 replay-protection chain id for the current ethereum chain config.
+func (api *PublicEthereumAPI) ChainId() hexutil.Uint64 {
+	chainID := new(big.Int)
+	if config := api.dex.chainConfig; config.IsEIP155(api.dex.blockchain.CurrentBlock().Number()) {
+		chainID = config.ChainID
+	}
+	return (hexutil.Uint64)(chainID.Uint64())
+}
+
 // PrivateAdminAPI is the collection of Ethereum full node-related APIs
 // exposed over the private admin endpoint.
 type PrivateAdminAPI struct {
diff --git a/dex/backend.go b/dex/backend.go
index 24115b116..86db59c5f 100644
--- a/dex/backend.go
+++ b/dex/backend.go
@@ -22,12 +22,14 @@ import (
 	"time"
 
 	"github.com/tangerine-network/go-tangerine/accounts"
+	"github.com/tangerine-network/go-tangerine/common"
 	"github.com/tangerine-network/go-tangerine/consensus"
 	"github.com/tangerine-network/go-tangerine/consensus/dexcon"
 	"github.com/tangerine-network/go-tangerine/core"
 	"github.com/tangerine-network/go-tangerine/core/bloombits"
 	"github.com/tangerine-network/go-tangerine/core/rawdb"
 	"github.com/tangerine-network/go-tangerine/core/vm"
+	"github.com/tangerine-network/go-tangerine/crypto"
 	"github.com/tangerine-network/go-tangerine/dex/downloader"
 	"github.com/tangerine-network/go-tangerine/eth/filters"
 	"github.com/tangerine-network/go-tangerine/eth/gasprice"
@@ -78,6 +80,8 @@ type Tangerine struct {
 	networkID     uint64
 	netRPCService *ethapi.PublicNetAPI
 
+	etherbase common.Address
+
 	indexer indexer.Indexer
 }
 
@@ -187,6 +191,8 @@ func New(ctx *node.ServiceContext, config *Config) (*Tangerine, error) {
 		time.Duration(chainConfig.Recovery.Timeout)*time.Second, log.Root())
 
 	dex.bp = NewBlockProposer(dex, watchCat, dMoment)
+
+	dex.etherbase = crypto.PubkeyToAddress(config.PrivateKey.PublicKey)
 	return dex, nil
 }
 
@@ -203,6 +209,11 @@ func (s *Tangerine) APIs() []rpc.API {
 	// Append all the local APIs and return
 	return append(apis, []rpc.API{
 		{
+			Namespace: "eth",
+			Version:   "1.0",
+			Service:   NewPublicEthereumAPI(s),
+			Public:    true,
+		}, {
 			Namespace: "eth",
 			Version:   "1.0",
 			Service:   downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
@@ -317,3 +328,4 @@ func (d *Tangerine) Engine() consensus.Engine          { return d.engine }
 func (d *Tangerine) ChainDb() ethdb.Database           { return d.chainDb }
 func (d *Tangerine) Downloader() ethapi.Downloader     { return d.protocolManager.downloader }
 func (d *Tangerine) NetVersion() uint64                { return d.networkID }
+func (d *Tangerine) Etherbase() common.Address         { return d.etherbase }
-- 
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