relay receipts with the rest of the data (don't know why I didn't realize to do this earlier)

statediff/service.go

@@ -40,6 +40,7 @@ type blockChain interface {
 	SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
 	GetBlockByHash(hash common.Hash) *types.Block
 	AddToStateDiffProcessedCollection(hash common.Hash)
+	GetReceiptsByHash(hash common.Hash) types.Receipts
 }
 
 // IService is the state-diffing service interface
@@ -69,7 +70,7 @@ type Service struct {
 	// Cache the last block so that we can avoid having to lookup the next block's parent
 	lastBlock *types.Block
 	// Whether or not the block data is streamed alongside the state diff data in the subscription payload
-	streamBlock bool
+	StreamBlock bool
 	// Whether or not we have any subscribers; only if we do, do we processes state diffs
 	subscribers int32
 }
@@ -82,7 +83,7 @@ func NewStateDiffService(db ethdb.Database, blockChain *core.BlockChain, config
 		Builder:       NewBuilder(db, blockChain, config),
 		QuitChan:      make(chan bool),
 		Subscriptions: make(map[rpc.ID]Subscription),
-		streamBlock:   config.StreamBlock,
+		StreamBlock:   config.StreamBlock,
 	}, nil
 }
 
@@ -108,7 +109,6 @@ func (sds *Service) Loop(chainEventCh chan core.ChainEvent) {
 	chainEventSub := sds.BlockChain.SubscribeChainEvent(chainEventCh)
 	defer chainEventSub.Unsubscribe()
 	errCh := chainEventSub.Err()
-
 	for {
 		select {
 		//Notify chain event channel of events
@@ -161,12 +161,19 @@ func (sds *Service) processStateDiff(currentBlock, parentBlock *types.Block) err
 		StateDiffRlp: stateDiffRlp,
 		Err:          err,
 	}
-	if sds.streamBlock {
+	if sds.StreamBlock {
-		rlpBuff := new(bytes.Buffer)
+		blockBuff := new(bytes.Buffer)
-		if err = currentBlock.EncodeRLP(rlpBuff); err != nil {
+		if err = currentBlock.EncodeRLP(blockBuff); err != nil {
 			return err
 		}
-		payload.BlockRlp = rlpBuff.Bytes()
+		payload.BlockRlp = blockBuff.Bytes()
+		receiptBuff := new(bytes.Buffer)
+		receipts := sds.BlockChain.GetReceiptsByHash(currentBlock.Hash())
+		if err = rlp.Encode(receiptBuff, receipts); err != nil {
+			println(err.Error())
+			return err
+		}
+		payload.ReceiptsRlp = receiptBuff.Bytes()
 	}
 
 	// If we have any websocket subscriptions listening in, send the data to them

statediff/service_test.go

@@ -21,11 +21,13 @@ import (
 	"math/big"
 	"math/rand"
 	"reflect"
+	"sync"
 	"testing"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/statediff"
 	"github.com/ethereum/go-ethereum/statediff/testhelpers/mocks"
@@ -33,7 +35,7 @@ import (
 
 func TestServiceLoop(t *testing.T) {
 	testErrorInChainEventLoop(t)
-	//testErrorInBlockLoop(t)
+	testErrorInBlockLoop(t)
 }
 
 var (
@@ -61,6 +63,12 @@ var (
 	testBlock2 = types.NewBlock(&header2, nil, nil, nil)
 	testBlock3 = types.NewBlock(&header3, nil, nil, nil)
 
+	receiptRoot1  = common.HexToHash("0x05")
+	receiptRoot2  = common.HexToHash("0x06")
+	receiptRoot3  = common.HexToHash("0x07")
+	testReceipts1 = []*types.Receipt{types.NewReceipt(receiptRoot1.Bytes(), false, 1000), types.NewReceipt(receiptRoot2.Bytes(), false, 2000)}
+	testReceipts2 = []*types.Receipt{types.NewReceipt(receiptRoot3.Bytes(), false, 3000)}
+
 	event1 = core.ChainEvent{Block: testBlock1}
 	event2 = core.ChainEvent{Block: testBlock2}
 	event3 = core.ChainEvent{Block: testBlock3}
@@ -71,25 +79,61 @@ func testErrorInChainEventLoop(t *testing.T) {
 	builder := mocks.Builder{}
 	blockChain := mocks.BlockChain{}
 	service := statediff.Service{
+		Mutex:         sync.Mutex{},
 		Builder:       &builder,
 		BlockChain:    &blockChain,
 		QuitChan:      make(chan bool),
 		Subscriptions: make(map[rpc.ID]statediff.Subscription),
+		StreamBlock:   true,
 	}
-	payloadChan := make(chan statediff.Payload)
+	payloadChan := make(chan statediff.Payload, 2)
 	quitChan := make(chan bool)
 	service.Subscribe(rpc.NewID(), payloadChan, quitChan)
 	testRoot2 = common.HexToHash("0xTestRoot2")
-	blockChain.SetParentBlocksToReturn([]*types.Block{parentBlock1, parentBlock2})
+	blockMapping := make(map[common.Hash]*types.Block)
+	blockMapping[parentBlock1.Hash()] = parentBlock1
+	blockMapping[parentBlock2.Hash()] = parentBlock2
+	blockChain.SetParentBlocksToReturn(blockMapping)
 	blockChain.SetChainEvents([]core.ChainEvent{event1, event2, event3})
-	// Need to have listeners on the channels or the subscription will be closed and the processing halted
+	blockChain.SetReceiptsForHash(testBlock1.Hash(), testReceipts1)
+	blockChain.SetReceiptsForHash(testBlock2.Hash(), testReceipts2)
+
+	payloads := make([]statediff.Payload, 0, 2)
+	wg := sync.WaitGroup{}
 	go func() {
-		select {
+		wg.Add(1)
-		case <-payloadChan:
+		for i := 0; i < 2; i++ {
-		case <-quitChan:
+			select {
+			case payload := <-payloadChan:
+				payloads = append(payloads, payload)
+			case <-quitChan:
+			}
 		}
+		wg.Done()
 	}()
+
 	service.Loop(eventsChannel)
+	wg.Wait()
+	if len(payloads) != 2 {
+		t.Error("Test failure:", t.Name())
+		t.Logf("Actual number of payloads does not equal expected.\nactual: %+v\nexpected: 3", len(payloads))
+	}
+
+	testReceipts1Rlp, err := rlp.EncodeToBytes(testReceipts1)
+	if err != nil {
+		t.Error(err)
+	}
+	testReceipts2Rlp, err := rlp.EncodeToBytes(testReceipts2)
+	if err != nil {
+		t.Error(err)
+	}
+	expectedReceiptsRlp := [][]byte{testReceipts1Rlp, testReceipts2Rlp, nil}
+	for i, payload := range payloads {
+		if !bytes.Equal(payload.ReceiptsRlp, expectedReceiptsRlp[i]) {
+			t.Error("Test failure:", t.Name())
+			t.Logf("Actual reeipt rlp for payload %d does not equal expected.\nactual: %+v\nexpected: %+v", i, payload.ReceiptsRlp, expectedReceiptsRlp[i])
+		}
+	}
 
 	if !reflect.DeepEqual(builder.BlockHash, testBlock2.Hash()) {
 		t.Error("Test failure:", t.Name())
@@ -121,9 +165,20 @@ func testErrorInBlockLoop(t *testing.T) {
 		QuitChan:      make(chan bool),
 		Subscriptions: make(map[rpc.ID]statediff.Subscription),
 	}
-
+	payloadChan := make(chan statediff.Payload)
-	blockChain.SetParentBlocksToReturn([]*types.Block{parentBlock1, nil})
+	quitChan := make(chan bool)
+	service.Subscribe(rpc.NewID(), payloadChan, quitChan)
+	blockMapping := make(map[common.Hash]*types.Block)
+	blockMapping[parentBlock1.Hash()] = parentBlock1
+	blockChain.SetParentBlocksToReturn(blockMapping)
 	blockChain.SetChainEvents([]core.ChainEvent{event1, event2})
+	// Need to have listeners on the channels or the subscription will be closed and the processing halted
+	go func() {
+		select {
+		case <-payloadChan:
+		case <-quitChan:
+		}
+	}()
 	service.Loop(eventsChannel)
 
 	if !bytes.Equal(builder.BlockHash.Bytes(), testBlock1.Hash().Bytes()) {

statediff/testhelpers/mocks/blockchain.go

@@ -30,16 +30,20 @@ import (
 // BlockChain is a mock blockchain for testing
 type BlockChain struct {
 	ParentHashesLookedUp []common.Hash
-	parentBlocksToReturn []*types.Block
+	parentBlocksToReturn map[common.Hash]*types.Block
 	callCount            int
 	ChainEvents          []core.ChainEvent
+	Receipts             map[common.Hash]types.Receipts
 }
 
 // AddToStateDiffProcessedCollection mock method
 func (blockChain *BlockChain) AddToStateDiffProcessedCollection(hash common.Hash) {}
 
 // SetParentBlocksToReturn mock method
-func (blockChain *BlockChain) SetParentBlocksToReturn(blocks []*types.Block) {
+func (blockChain *BlockChain) SetParentBlocksToReturn(blocks map[common.Hash]*types.Block) {
+	if blockChain.parentBlocksToReturn == nil {
+		blockChain.parentBlocksToReturn = make(map[common.Hash]*types.Block)
+	}
 	blockChain.parentBlocksToReturn = blocks
 }
 
@@ -49,10 +53,9 @@ func (blockChain *BlockChain) GetBlockByHash(hash common.Hash) *types.Block {
 
 	var parentBlock *types.Block
 	if len(blockChain.parentBlocksToReturn) > 0 {
-		parentBlock = blockChain.parentBlocksToReturn[blockChain.callCount]
+		parentBlock = blockChain.parentBlocksToReturn[hash]
 	}
 
-	blockChain.callCount++
 	return parentBlock
 }
 
@@ -84,3 +87,16 @@ func (blockChain *BlockChain) SubscribeChainEvent(ch chan<- core.ChainEvent) eve
 
 	return subscription
 }
+
+// SetReceiptsForHash mock method
+func (blockChain *BlockChain) SetReceiptsForHash(hash common.Hash, receipts types.Receipts) {
+	if blockChain.Receipts == nil {
+		blockChain.Receipts = make(map[common.Hash]types.Receipts)
+	}
+	blockChain.Receipts[hash] = receipts
+}
+
+// GetReceiptsByHash mock method
+func (blockChain *BlockChain) GetReceiptsByHash(hash common.Hash) types.Receipts {
+	return blockChain.Receipts[hash]
+}

statediff/types.go

@@ -36,15 +36,16 @@ type Subscription struct {
 
 // Payload packages the data to send to StateDiffingService subscriptions
 type Payload struct {
-	BlockRlp     []byte `json:"blockRlp"     gencodec:"required"`
+	BlockRlp     []byte `json:"blockRlp"`
+	ReceiptsRlp  []byte `json:"receiptsRlp"`
 	StateDiffRlp []byte `json:"stateDiff"    gencodec:"required"`
 	Err          error  `json:"error"`
 }
 
 // StateDiff is the final output structure from the builder
 type StateDiff struct {
-	BlockNumber     *big.Int      `json:"blockNumber"	    gencodec:"required"`
+	BlockNumber     *big.Int      `json:"blockNumber"	  gencodec:"required"`
-	BlockHash       common.Hash   `json:"blockHash" 	    gencodec:"required"`
+	BlockHash       common.Hash   `json:"blockHash" 	  gencodec:"required"`
 	CreatedAccounts []AccountDiff `json:"createdAccounts" gencodec:"required"`
 	DeletedAccounts []AccountDiff `json:"deletedAccounts" gencodec:"required"`
 	UpdatedAccounts []AccountDiff `json:"updatedAccounts" gencodec:"required"`