Get work / submit work partially implemented.

* WIP missing arguments for submitting new work
* GetWork **done**

2 files changed, 90 insertions, 3 deletions

diff --git a/rpc/api.go b/rpc/api.go
index 34d4ff0fc..d5e18eec8 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -17,15 +17,20 @@ type EthereumApi struct {
 	eth    *xeth.XEth
 	xethMu sync.RWMutex
 	db     common.Database
+
+	// Miner agent
+	agent *Agent
 }
 
 func NewEthereumApi(eth *xeth.XEth, dataDir string) *EthereumApi {
 	// What about when dataDir is empty?
 	db, _ := ethdb.NewLDBDatabase(path.Join(dataDir, "dapps"))
 	api := &EthereumApi{
-		eth: eth,
-		db:  db,
+		eth:   eth,
+		db:    db,
+		agent: NewAgent(),
 	}
+	eth.Backend().Miner().Register(api.agent)
 
 	return api
 }
@@ -342,7 +347,13 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		}
 		opts := toFilterOptions(args)
 		*reply = NewLogsRes(p.xeth().AllLogs(opts))
-	case "eth_getWork", "eth_submitWork":
+	case "eth_getWork":
+		*reply = p.getWork()
+	case "eth_submitWork":
+		// TODO what is the reply here?
+		// TODO what are the arguments?
+		p.agent.SetResult(0, common.Hash{}, common.Hash{})
+
 		return NewNotImplementedError(req.Method)
 	case "db_putString":
 		args := new(DbArgs)
@@ -427,6 +438,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 		*reply = p.xeth().Whisper().Messages(args.Id)
+
 	// case "eth_register":
 	// 	// Placeholder for actual type
 	// 	args := new(HashIndexArgs)
@@ -454,6 +466,11 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 	return nil
 }
 
+func (p *EthereumApi) getWork() string {
+	p.xeth().SetMining(true)
+	return p.agent.GetWork().Hex()
+}
+
 func toFilterOptions(options *BlockFilterArgs) *core.FilterOptions {
 	var opts core.FilterOptions
 
diff --git a/rpc/miner_agest.go b/rpc/miner_agest.go
new file mode 100644
index 000000000..f883ef54e
--- /dev/null
+++ b/rpc/miner_agest.go
@@ -0,0 +1,70 @@
+package rpc
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/miner"
+)
+
+type Agent struct {
+	work        *types.Block
+	currentWork *types.Block
+
+	quit     chan struct{}
+	workCh   chan *types.Block
+	returnCh chan<- miner.Work
+}
+
+func NewAgent() *Agent {
+	agent := &Agent{}
+	go agent.run()
+
+	return agent
+}
+
+func (a *Agent) Work() chan<- *types.Block {
+	return a.workCh
+}
+
+func (a *Agent) SetWorkCh(returnCh chan<- miner.Work) {
+	a.returnCh = returnCh
+}
+
+func (a *Agent) Start() {
+	a.quit = make(chan struct{})
+	a.workCh = make(chan *types.Block, 1)
+}
+
+func (a *Agent) Stop() {
+	close(a.quit)
+	close(a.workCh)
+}
+
+func (a *Agent) GetHashRate() int64 { return 0 }
+
+func (a *Agent) run() {
+out:
+	for {
+		select {
+		case <-a.quit:
+			break out
+		case work := <-a.workCh:
+			a.work = work
+		}
+	}
+}
+
+func (a *Agent) GetWork() common.Hash {
+	// XXX Wait here untill work != nil ?
+	if a.work != nil {
+		return a.work.HashNoNonce()
+	}
+	return common.Hash{}
+}
+
+func (a *Agent) SetResult(nonce uint64, mixDigest, seedHash common.Hash) {
+	// Make sure the external miner was working on the right hash
+	if a.currentWork.Hash() == a.work.Hash() {
+		a.returnCh <- miner.Work{a.currentWork.Number().Uint64(), nonce, mixDigest.Bytes(), seedHash.Bytes()}
+	}
+}