dex: remove duplicate declaration of WitnessData (#92)

Remove duplicate declaration of WitnessData and remove the TxHash field
in witness data since it does not need to be witnessed.

4 files changed, 3 insertions, 21 deletions

diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index 867cfef5e..e8d96e5c8 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -1658,7 +1658,6 @@ func TestProcessPendingBlock(t *testing.T) {
 		if i == 0 {
 			witnessData := types.WitnessData{
 				Root:        gspec.ToBlock(nil).Root(),
-				TxHash:      gspec.ToBlock(nil).TxHash(),
 				ReceiptHash: gspec.ToBlock(nil).ReceiptHash(),
 			}
 			witnessDataBytes, err = rlp.EncodeToBytes(&witnessData)
@@ -1668,7 +1667,6 @@ func TestProcessPendingBlock(t *testing.T) {
 		} else {
 			witnessData := types.WitnessData{
 				Root:        chain.pendingBlocks[uint64(i)].block.Root(),
-				TxHash:      chain.pendingBlocks[uint64(i)].block.TxHash(),
 				ReceiptHash: chain.pendingBlocks[uint64(i)].block.ReceiptHash(),
 			}
 			witnessDataBytes, err = rlp.EncodeToBytes(&witnessData)
@@ -1721,7 +1719,6 @@ func TestProcessPendingBlock(t *testing.T) {
 	// Validate witness fail with unknown block.
 	witnessData := types.WitnessData{
 		Root:        chain.pendingBlocks[processNum].block.Root(),
-		TxHash:      chain.pendingBlocks[processNum].block.TxHash(),
 		ReceiptHash: chain.pendingBlocks[processNum].block.ReceiptHash(),
 	}
 	witnessDataBytes, err := rlp.EncodeToBytes(&witnessData)
@@ -1745,7 +1742,6 @@ func TestProcessPendingBlock(t *testing.T) {
 	// Validate witness fail with unexpected root.
 	witnessData = types.WitnessData{
 		Root:        chain.pendingBlocks[processNum].block.Root(),
-		TxHash:      chain.pendingBlocks[processNum].block.TxHash(),
 		ReceiptHash: chain.pendingBlocks[processNum].block.ReceiptHash(),
 	}
 	witnessDataBytes, err = rlp.EncodeToBytes(&witnessData)
@@ -1769,7 +1765,6 @@ func TestProcessPendingBlock(t *testing.T) {
 	// Apply transaction fail with insufficient fund.
 	witnessData = types.WitnessData{
 		Root:        chain.pendingBlocks[processNum].block.Root(),
-		TxHash:      chain.pendingBlocks[processNum].block.TxHash(),
 		ReceiptHash: chain.pendingBlocks[processNum].block.ReceiptHash(),
 	}
 	witnessDataBytes, err = rlp.EncodeToBytes(&witnessData)
@@ -1802,7 +1797,6 @@ func TestProcessPendingBlock(t *testing.T) {
 	// Apply transaction fail with nonce too height.
 	witnessData = types.WitnessData{
 		Root:        chain.pendingBlocks[processNum].block.Root(),
-		TxHash:      chain.pendingBlocks[processNum].block.TxHash(),
 		ReceiptHash: chain.pendingBlocks[processNum].block.ReceiptHash(),
 	}
 	witnessDataBytes, err = rlp.EncodeToBytes(&witnessData)
diff --git a/core/types/block.go b/core/types/block.go
index 3766d3ac0..23da3ea77 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -67,7 +67,6 @@ func (n *BlockNonce) UnmarshalText(input []byte) error {
 // WitnessData represents the witness data.
 type WitnessData struct {
 	Root        common.Hash
-	TxHash      common.Hash
 	ReceiptHash common.Hash
 }
 
diff --git a/dex/app.go b/dex/app.go
index 8da00d07b..9dcfd87e9 100644
--- a/dex/app.go
+++ b/dex/app.go
@@ -50,12 +50,6 @@ type DexconApp struct {
 	chainLocks sync.Map
 }
 
-type witnessData struct {
-	Root        common.Hash
-	TxHash      common.Hash
-	ReceiptHash common.Hash
-}
-
 func NewDexconApp(txPool *core.TxPool, blockchain *core.BlockChain, gov *DexconGovernance,
 	chainDB ethdb.Database, config *Config) *DexconApp {
 	return &DexconApp{
@@ -283,9 +277,8 @@ func (d *DexconApp) PrepareWitness(consensusHeight uint64) (witness coreTypes.Wi
 		return witness, fmt.Errorf("last pending height < consensus height")
 	}
 
-	witnessData, err := rlp.EncodeToBytes(&witnessData{
+	witnessData, err := rlp.EncodeToBytes(&types.WitnessData{
 		Root:        witnessBlock.Root(),
-		TxHash:      witnessBlock.TxHash(),
 		ReceiptHash: witnessBlock.ReceiptHash(),
 	})
 	if err != nil {
@@ -300,7 +293,7 @@ func (d *DexconApp) PrepareWitness(consensusHeight uint64) (witness coreTypes.Wi
 
 // VerifyBlock verifies if the payloads are valid.
 func (d *DexconApp) VerifyBlock(block *coreTypes.Block) coreTypes.BlockVerifyStatus {
-	var witnessData witnessData
+	var witnessData types.WitnessData
 	err := rlp.DecodeBytes(block.Witness.Data, &witnessData)
 	if err != nil {
 		log.Error("failed to RLP decode witness data", "error", err)
diff --git a/dex/app_test.go b/dex/app_test.go
index abe83b92a..82bf8a6f6 100644
--- a/dex/app_test.go
+++ b/dex/app_test.go
@@ -115,16 +115,12 @@ func TestPrepareWitness(t *testing.T) {
 		t.Errorf("unexpeted witness height %v", witness.Height)
 	}
 
-	var witnessData witnessData
+	var witnessData types.WitnessData
 	err = rlp.DecodeBytes(witness.Data, &witnessData)
 	if err != nil {
 		t.Errorf("rlp decode error: %v", err)
 	}
 
-	if witnessData.TxHash != currentBlock.TxHash() {
-		t.Errorf("expect tx hash %v but %v", currentBlock.TxHash(), witnessData.TxHash)
-	}
-
 	if witnessData.Root != currentBlock.Root() {
 		t.Errorf("expect root %v but %v", currentBlock.Root(), witnessData.Root)
 	}