db/db_get.go

@@ -3,6 +3,7 @@ package db
 // db_get.go contains the basic access functions to the database.
 
 import (
+	"bytes"
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
@@ -12,6 +13,7 @@ import (
 	"github.com/lbryio/herald.go/db/prefixes"
 	"github.com/lbryio/herald.go/db/stack"
 	"github.com/lbryio/lbcd/chaincfg/chainhash"
+	"github.com/lbryio/lbcd/wire"
 	"github.com/linxGnu/grocksdb"
 )
 
@@ -731,6 +733,71 @@ func (db *ReadOnlyDBColumnFamily) FsGetClaimByHash(claimHash []byte) (*ResolveRe
 	)
 }
 
+func (db *ReadOnlyDBColumnFamily) GetTx(txhash *chainhash.Hash) ([]byte, *wire.MsgTx, error) {
+	// Lookup in MempoolTx first.
+	raw, tx, err := db.getMempoolTx(txhash)
+	if err == nil && raw != nil && tx != nil {
+		return raw, tx, err
+	}
+
+	handle, err := db.EnsureHandle(prefixes.Tx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	key := prefixes.TxKey{Prefix: []byte{prefixes.Tx}, TxHash: txhash}
+	rawKey := key.PackKey()
+	slice, err := db.DB.GetCF(db.Opts, handle, rawKey)
+	defer slice.Free()
+	if err != nil {
+		return nil, nil, err
+	}
+	if slice.Size() == 0 {
+		return nil, nil, nil
+	}
+
+	rawValue := make([]byte, len(slice.Data()))
+	copy(rawValue, slice.Data())
+	value := prefixes.TxValue{}
+	value.UnpackValue(rawValue)
+	var msgTx wire.MsgTx
+	err = msgTx.Deserialize(bytes.NewReader(value.RawTx))
+	if err != nil {
+		return nil, nil, err
+	}
+	return value.RawTx, &msgTx, nil
+}
+
+func (db *ReadOnlyDBColumnFamily) getMempoolTx(txhash *chainhash.Hash) ([]byte, *wire.MsgTx, error) {
+	handle, err := db.EnsureHandle(prefixes.MempoolTx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	key := prefixes.MempoolTxKey{Prefix: []byte{prefixes.Tx}, TxHash: txhash}
+	rawKey := key.PackKey()
+	slice, err := db.DB.GetCF(db.Opts, handle, rawKey)
+	defer slice.Free()
+	if err != nil {
+		return nil, nil, err
+	}
+	if slice.Size() == 0 {
+		return nil, nil, nil
+	}
+
+	rawValue := make([]byte, len(slice.Data()))
+	copy(rawValue, slice.Data())
+	value := prefixes.MempoolTxValue{}
+	value.UnpackValue(rawValue)
+	var msgTx wire.MsgTx
+	err = msgTx.Deserialize(bytes.NewReader(value.RawTx))
+	if err != nil {
+		return nil, nil, err
+	}
+	return value.RawTx, &msgTx, nil
+}
+
+
 func (db *ReadOnlyDBColumnFamily) GetTxCount(height uint32) (*prefixes.TxCountValue, error) {
 	handle, err := db.EnsureHandle(prefixes.TxCount)
 	if err != nil {
@@ -754,6 +821,29 @@ func (db *ReadOnlyDBColumnFamily) GetTxCount(height uint32) (*prefixes.TxCountVa
 	return value, nil
 }
 
+func (db *ReadOnlyDBColumnFamily) GetTxHeight(txhash *chainhash.Hash) (uint32, error) {
+	handle, err := db.EnsureHandle(prefixes.TxNum)
+	if err != nil {
+		return 0, err
+	}
+
+	key := prefixes.TxNumKey{Prefix: []byte{prefixes.TxNum}, TxHash: txhash}
+	rawKey := key.PackKey()
+	slice, err := db.DB.GetCF(db.Opts, handle, rawKey)
+	defer slice.Free()
+	if err != nil {
+		return 0, err
+	}
+	if slice.Size() == 0 {
+		return 0, nil
+	}
+
+	// No slice copy needed. Value will be abandoned.
+	value := prefixes.TxNumValueUnpack(slice.Data())
+	height := stack.BisectRight(db.TxCounts, []uint32{value.TxNum})[0]
+	return height, nil
+}
+
 func (db *ReadOnlyDBColumnFamily) GetDBState() (*prefixes.DBStateValue, error) {
 	handle, err := db.EnsureHandle(prefixes.DBState)
 	if err != nil {

db/prefixes/prefixes.go

@@ -1050,84 +1050,6 @@ func TxNumValueUnpack(value []byte) *TxNumValue {
 	}
 }
 
-type TxKey struct {
-	Prefix []byte          `struct:"[1]byte" json:"prefix"`
-	TxHash *chainhash.Hash `struct:"*[32]byte" json:"tx_hash"`
-}
-
-type TxValue struct {
-	RawTx []byte `struct-while:"!_eof" json:"raw_tx"`
-}
-
-func (k *TxKey) PackKey() []byte {
-	prefixLen := 1
-	// b'>L'
-	n := prefixLen + 32
-	key := make([]byte, n)
-	copy(key, k.Prefix)
-	copy(key[prefixLen:], k.TxHash[:32])
-
-	return key
-}
-
-func (v *TxValue) PackValue() []byte {
-	value := make([]byte, len(v.RawTx))
-	copy(value, v.RawTx)
-
-	return value
-}
-
-func (kv *TxKey) NumFields() int {
-	return 1
-}
-
-func (k *TxKey) PartialPack(fields int) []byte {
-	// Limit fields between 0 and number of fields, we always at least need
-	// the prefix, and we never need to iterate past the number of fields.
-	if fields > 1 {
-		fields = 1
-	}
-	if fields < 0 {
-		fields = 0
-	}
-
-	prefixLen := 1
-	var n = prefixLen
-	for i := 0; i <= fields; i++ {
-		switch i {
-		case 1:
-			n += 32
-		}
-	}
-
-	key := make([]byte, n)
-
-	for i := 0; i <= fields; i++ {
-		switch i {
-		case 0:
-			copy(key, k.Prefix)
-		case 1:
-			copy(key[prefixLen:], k.TxHash[:32])
-		}
-	}
-
-	return key
-}
-
-func TxKeyUnpack(key []byte) *TxKey {
-	prefixLen := 1
-	return &TxKey{
-		Prefix: key[:prefixLen],
-		TxHash: (*chainhash.Hash)(key[prefixLen : prefixLen+32]),
-	}
-}
-
-func TxValueUnpack(value []byte) *TxValue {
-	return &TxValue{
-		RawTx: value,
-	}
-}
-
 type BlockHeaderKey struct {
 	Prefix []byte `struct:"[1]byte" json:"prefix"`
 	Height uint32 `json:"height"`
@@ -3351,9 +3273,12 @@ func (kv *TrendingNotificationValue) UnpackValue(buf []byte) {
 	offset += 8
 }
 
+type TxKey = MempoolTxKey
+type TxValue = MempoolTxValue
+
 type MempoolTxKey struct {
-	Prefix []byte `struct:"[1]byte"  json:"prefix"`
-	TxHash []byte `struct:"[32]byte" json:"tx_hash"`
+	Prefix []byte          `struct:"[1]byte" json:"prefix"`
+	TxHash *chainhash.Hash `struct:"*[32]byte" json:"tx_hash"`
 }
 
 type MempoolTxValue struct {
@@ -3386,7 +3311,7 @@ func (kv *MempoolTxKey) UnpackKey(buf []byte) {
 	offset := 0
 	kv.Prefix = buf[offset : offset+1]
 	offset += 1
-	kv.TxHash = buf[offset : offset+32]
+	kv.TxHash = (*chainhash.Hash)(buf[offset : offset+32])
 	offset += 32
 }
 
@@ -3925,12 +3850,6 @@ var prefixRegistry = map[byte]prefixMeta{
 		newValue: func() interface{} {
 			return &TxValue{}
 		},
-		newKeyUnpack: func(buf []byte) interface{} {
-			return TxKeyUnpack(buf)
-		},
-		newValueUnpack: func(buf []byte) interface{} {
-			return TxValueUnpack(buf)
-		},
 	},
 	BlockHash: {
 		newKey: func() interface{} {

server/jsonrpc_blockchain.go

@@ -55,6 +55,14 @@ type BlockchainScripthashService struct {
 	session    *session
 }
 
+// BlockchainTransactionService methods handle "blockchain.transaction.*" RPCs
+type BlockchainTransactionService struct {
+	DB    *db.ReadOnlyDBColumnFamily
+	Chain *chaincfg.Params
+	// needed for broadcast TX
+	sessionMgr *sessionManager
+}
+
 const CHUNK_SIZE = 96
 const MAX_CHUNK_SIZE = 40960
 const HEADER_SIZE = wire.MaxBlockHeaderPayload
@@ -626,3 +634,138 @@ func (s *BlockchainScripthashService) Unsubscribe(req *ScripthashSubscribeReq, r
 	*resp = (*ScripthashSubscribeResp)(nil)
 	return nil
 }
+
+type TransactionBroadcastReq string
+type TransactionBroadcastResp string
+
+// 'blockchain.transaction.broadcast'
+func (s *BlockchainTransactionService) Broadcast(req *TransactionBroadcastReq, resp **TransactionBroadcastResp) error {
+	strTx := string(*req)
+	rawTx, err := hex.DecodeString(strTx)
+	if err != nil {
+		return err
+	}
+	txhash, err := s.sessionMgr.broadcastTx(rawTx)
+	if err != nil {
+		return err
+	}
+	result := txhash.String()
+	*resp = (*TransactionBroadcastResp)(&result)
+	return nil
+}
+
+type TransactionGetReq string
+type TXFullDetail struct {
+	Height uint32 `json:"block_height"`
+	Merkle string `json:"merkle"`
+	Pos    uint64 `json:"pos"`
+}
+type TXDetail struct {
+	Height uint32 `json:"block_height"`
+}
+
+// TransactionResp is a pair consisting of:
+// resp[0]: Raw transaction as hex string
+// resp[1]: TXFullDetail or TXDetail structure
+type TXGetResp [2]interface{}
+type TransactionGetResp TXGetResp
+
+// 'blockchain.transaction.get'
+func (s *BlockchainTransactionService) Get(req *TransactionGetReq, resp **TransactionGetResp) error {
+	txids := [1]string{string(*req)}
+	request := TransactionGetBatchReq(txids[:])
+	var response *TransactionGetBatchResp
+	err := s.Get_batch(&request, &response)
+	if err != nil {
+		return err
+	}
+	if len(*response) < 1 {
+		return errors.New("tx not found")
+	}
+	switch (*response)[0][1].(type) {
+	case TXFullDetail:
+		break
+	case TXDetail:
+	default:
+		return errors.New("tx not confirmed")
+	}
+	*resp = (*TransactionGetResp)(&(*response)[0])
+	return err
+}
+
+type TransactionGetBatchReq []string
+type TransactionGetBatchResp []TXGetResp
+
+// 'blockchain.transaction.get_batch'
+func (s *BlockchainTransactionService) Get_batch(req *TransactionGetBatchReq, resp **TransactionGetBatchResp) error {
+	return nil
+}
+
+type TransactionGetMerkleReq string
+type TransactionGetMerkleResp TXGetResp
+
+// 'blockchain.transaction.get_merkle'
+func (s *BlockchainTransactionService) Get_merkle(req *TransactionGetMerkleReq, resp **TransactionGetMerkleResp) error {
+	txids := [1]string{string(*req)}
+	request := TransactionGetBatchReq(txids[:])
+	var response *TransactionGetBatchResp
+	err := s.Get_batch(&request, &response)
+	if err != nil {
+		return err
+	}
+	if len(*response) < 1 {
+		return errors.New("tx not found")
+	}
+	switch (*response)[0][1].(type) {
+	case TXFullDetail:
+		break
+	case TXDetail:
+	default:
+		return errors.New("tx not confirmed")
+	}
+	*resp = (*TransactionGetMerkleResp)(&(*response)[0])
+	return err
+}
+
+type TransactionGetHeightReq string
+type TransactionGetHeightResp uint32
+
+// 'blockchain.transaction.get_height'
+func (s *BlockchainTransactionService) Get_height(req *TransactionGetHeightReq, resp **TransactionGetHeightResp) error {
+	txid := string(*(req))
+	txhash, err := chainhash.NewHashFromStr(txid)
+	if err != nil {
+		return err
+	}
+	height, err := s.DB.GetTxHeight(txhash)
+	*resp = (*TransactionGetHeightResp)(&height)
+	return err
+}
+
+type TransactionInfoReq string
+type TransactionInfoResp TXGetResp
+
+// 'blockchain.transaction.info'
+func (s *BlockchainTransactionService) Info(req *TransactionInfoReq, resp **TransactionInfoResp) error {
+	txids := [1]string{string(*req)}
+	request := TransactionGetBatchReq(txids[:])
+	var response *TransactionGetBatchResp
+	err := s.Get_batch(&request, &response)
+	if err != nil {
+		return err
+	}
+	if len(*response) < 1 {
+		return errors.New("tx not found")
+	}
+	switch (*response)[0][1].(type) {
+	case TXFullDetail:
+		break
+	case TXDetail:
+	default:
+		if (*response)[0][0] == nil {
+			return errors.New("no such mempool or blockchain transaction")
+		}
+	}
+	*resp = (*TransactionInfoResp)(&(*response)[0])
+	return err
+}

server/session.go

@@ -16,6 +16,7 @@ import (
 	"github.com/lbryio/herald.go/db"
 	"github.com/lbryio/herald.go/internal"
 	"github.com/lbryio/lbcd/chaincfg"
+	"github.com/lbryio/lbcd/chaincfg/chainhash"
 	"github.com/lbryio/lbry.go/v3/extras/stop"
 	log "github.com/sirupsen/logrus"
 )
@@ -276,6 +277,11 @@ func (sm *sessionManager) removeSessionLocked(sess *session) {
 	sess.conn.Close()
 }
 
+func (sm *sessionManager) broadcastTx(rawTx []byte) (*chainhash.Hash, error) {
+	// TODO
+	return nil, nil
+}
+
 func (sm *sessionManager) headersSubscribe(sess *session, raw bool, subscribe bool) {
 	sm.sessionsMut.Lock()
 	defer sm.sessionsMut.Unlock()