752 lines
18 KiB
Go
752 lines
18 KiB
Go
package btc
|
|
|
|
import (
|
|
"blockbook/bchain"
|
|
"bytes"
|
|
"context"
|
|
"encoding/hex"
|
|
"encoding/json"
|
|
"io"
|
|
"io/ioutil"
|
|
"net"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/btcsuite/btcd/wire"
|
|
|
|
"github.com/golang/glog"
|
|
"github.com/juju/errors"
|
|
)
|
|
|
|
// BitcoinRPC is an interface to JSON-RPC bitcoind service.
|
|
type BitcoinRPC struct {
|
|
client http.Client
|
|
rpcURL string
|
|
user string
|
|
password string
|
|
Parser bchain.BlockChainParser
|
|
Testnet bool
|
|
Network string
|
|
Mempool *bchain.UTXOMempool
|
|
ParseBlocks bool
|
|
pushHandler func(bchain.NotificationType)
|
|
mq *bchain.MQ
|
|
ChainConfig *Configuration
|
|
RPCMarshaler RPCMarshaler
|
|
}
|
|
|
|
type Configuration struct {
|
|
CoinName string `json:"coin_name"`
|
|
CoinShortcut string `json:"coin_shortcut"`
|
|
RPCURL string `json:"rpc_url"`
|
|
RPCUser string `json:"rpc_user"`
|
|
RPCPass string `json:"rpc_pass"`
|
|
RPCTimeout int `json:"rpc_timeout"`
|
|
Parse bool `json:"parse"`
|
|
MessageQueueBinding string `json:"message_queue_binding"`
|
|
Subversion string `json:"subversion"`
|
|
BlockAddressesToKeep int `json:"block_addresses_to_keep"`
|
|
MempoolWorkers int `json:"mempool_workers"`
|
|
MempoolSubWorkers int `json:"mempool_sub_workers"`
|
|
AddressFormat string `json:"address_format"`
|
|
}
|
|
|
|
// NewBitcoinRPC returns new BitcoinRPC instance.
|
|
func NewBitcoinRPC(config json.RawMessage, pushHandler func(bchain.NotificationType)) (bchain.BlockChain, error) {
|
|
var err error
|
|
var c Configuration
|
|
err = json.Unmarshal(config, &c)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "Invalid configuration file")
|
|
}
|
|
// keep at least 100 mappings block->addresses to allow rollback
|
|
if c.BlockAddressesToKeep < 100 {
|
|
c.BlockAddressesToKeep = 100
|
|
}
|
|
// at least 1 mempool worker/subworker for synchronous mempool synchronization
|
|
if c.MempoolWorkers < 1 {
|
|
c.MempoolWorkers = 1
|
|
}
|
|
if c.MempoolSubWorkers < 1 {
|
|
c.MempoolSubWorkers = 1
|
|
}
|
|
|
|
transport := &http.Transport{
|
|
Dial: (&net.Dialer{KeepAlive: 600 * time.Second}).Dial,
|
|
MaxIdleConns: 100,
|
|
MaxIdleConnsPerHost: 100, // necessary to not to deplete ports
|
|
}
|
|
|
|
s := &BitcoinRPC{
|
|
client: http.Client{Timeout: time.Duration(c.RPCTimeout) * time.Second, Transport: transport},
|
|
rpcURL: c.RPCURL,
|
|
user: c.RPCUser,
|
|
password: c.RPCPass,
|
|
ParseBlocks: c.Parse,
|
|
ChainConfig: &c,
|
|
pushHandler: pushHandler,
|
|
RPCMarshaler: JSONMarshalerV2{},
|
|
}
|
|
|
|
return s, nil
|
|
}
|
|
|
|
// GetChainInfoAndInitializeMempool is called by Initialize and reused by other coins
|
|
// it contacts the blockchain rpc interface for the first time
|
|
// and if successful it connects to ZeroMQ and creates mempool handler
|
|
func (b *BitcoinRPC) GetChainInfoAndInitializeMempool(bc bchain.BlockChain) (string, error) {
|
|
// try to connect to block chain and get some info
|
|
chainName, err := bc.GetBlockChainInfo()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
mq, err := bchain.NewMQ(b.ChainConfig.MessageQueueBinding, b.pushHandler)
|
|
if err != nil {
|
|
glog.Error("mq: ", err)
|
|
return "", err
|
|
}
|
|
b.mq = mq
|
|
|
|
b.Mempool = bchain.NewUTXOMempool(bc, b.ChainConfig.MempoolWorkers, b.ChainConfig.MempoolSubWorkers)
|
|
|
|
return chainName, nil
|
|
}
|
|
|
|
// Initialize initializes BitcoinRPC instance.
|
|
func (b *BitcoinRPC) Initialize() error {
|
|
|
|
chainName, err := b.GetChainInfoAndInitializeMempool(b)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
params := GetChainParams(chainName)
|
|
|
|
// always create parser
|
|
b.Parser = NewBitcoinParser(params, b.ChainConfig)
|
|
|
|
// parameters for getInfo request
|
|
if params.Net == wire.MainNet {
|
|
b.Testnet = false
|
|
b.Network = "livenet"
|
|
} else {
|
|
b.Testnet = true
|
|
b.Network = "testnet"
|
|
}
|
|
|
|
glog.Info("rpc: block chain ", params.Name)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (b *BitcoinRPC) Shutdown(ctx context.Context) error {
|
|
if b.mq != nil {
|
|
if err := b.mq.Shutdown(ctx); err != nil {
|
|
glog.Error("MQ.Shutdown error: ", err)
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (b *BitcoinRPC) IsTestnet() bool {
|
|
return b.Testnet
|
|
}
|
|
|
|
func (b *BitcoinRPC) GetNetworkName() string {
|
|
return b.Network
|
|
}
|
|
|
|
func (b *BitcoinRPC) GetCoinName() string {
|
|
return b.ChainConfig.CoinName
|
|
}
|
|
|
|
func (b *BitcoinRPC) GetSubversion() string {
|
|
return b.ChainConfig.Subversion
|
|
}
|
|
|
|
// getblockhash
|
|
|
|
type CmdGetBlockHash struct {
|
|
Method string `json:"method"`
|
|
Params struct {
|
|
Height uint32 `json:"height"`
|
|
} `json:"params"`
|
|
}
|
|
|
|
type ResGetBlockHash struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result string `json:"result"`
|
|
}
|
|
|
|
// getbestblockhash
|
|
|
|
type CmdGetBestBlockHash struct {
|
|
Method string `json:"method"`
|
|
}
|
|
|
|
type ResGetBestBlockHash struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result string `json:"result"`
|
|
}
|
|
|
|
// getblockcount
|
|
|
|
type CmdGetBlockCount struct {
|
|
Method string `json:"method"`
|
|
}
|
|
|
|
type ResGetBlockCount struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result uint32 `json:"result"`
|
|
}
|
|
|
|
// getblockchaininfo
|
|
|
|
type CmdGetBlockChainInfo struct {
|
|
Method string `json:"method"`
|
|
}
|
|
|
|
type ResGetBlockChainInfo struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result struct {
|
|
Chain string `json:"chain"`
|
|
Blocks int `json:"blocks"`
|
|
Headers int `json:"headers"`
|
|
Bestblockhash string `json:"bestblockhash"`
|
|
} `json:"result"`
|
|
}
|
|
|
|
// getrawmempool
|
|
|
|
type CmdGetMempool struct {
|
|
Method string `json:"method"`
|
|
}
|
|
|
|
type ResGetMempool struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result []string `json:"result"`
|
|
}
|
|
|
|
// getblockheader
|
|
|
|
type CmdGetBlockHeader struct {
|
|
Method string `json:"method"`
|
|
Params struct {
|
|
BlockHash string `json:"blockhash"`
|
|
Verbose bool `json:"verbose"`
|
|
} `json:"params"`
|
|
}
|
|
|
|
type ResGetBlockHeader struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result bchain.BlockHeader `json:"result"`
|
|
}
|
|
|
|
// getblock
|
|
|
|
type CmdGetBlock struct {
|
|
Method string `json:"method"`
|
|
Params struct {
|
|
BlockHash string `json:"blockhash"`
|
|
Verbosity int `json:"verbosity"`
|
|
} `json:"params"`
|
|
}
|
|
|
|
type ResGetBlockRaw struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result string `json:"result"`
|
|
}
|
|
|
|
type ResGetBlockThin struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result bchain.ThinBlock `json:"result"`
|
|
}
|
|
|
|
type ResGetBlockFull struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result bchain.Block `json:"result"`
|
|
}
|
|
|
|
// getrawtransaction
|
|
|
|
type CmdGetRawTransaction struct {
|
|
Method string `json:"method"`
|
|
Params struct {
|
|
Txid string `json:"txid"`
|
|
Verbose bool `json:"verbose"`
|
|
} `json:"params"`
|
|
}
|
|
|
|
type ResGetRawTransaction struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result json.RawMessage `json:"result"`
|
|
}
|
|
|
|
type ResGetRawTransactionNonverbose struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result string `json:"result"`
|
|
}
|
|
|
|
// estimatesmartfee
|
|
|
|
type CmdEstimateSmartFee struct {
|
|
Method string `json:"method"`
|
|
Params struct {
|
|
ConfTarget int `json:"conf_target"`
|
|
EstimateMode string `json:"estimate_mode"`
|
|
} `json:"params"`
|
|
}
|
|
|
|
type ResEstimateSmartFee struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result struct {
|
|
Feerate float64 `json:"feerate"`
|
|
Blocks int `json:"blocks"`
|
|
} `json:"result"`
|
|
}
|
|
|
|
// estimatefee
|
|
|
|
type CmdEstimateFee struct {
|
|
Method string `json:"method"`
|
|
Params struct {
|
|
Blocks int `json:"nblocks"`
|
|
} `json:"params"`
|
|
}
|
|
|
|
type ResEstimateFee struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result float64 `json:"result"`
|
|
}
|
|
|
|
// sendrawtransaction
|
|
|
|
type CmdSendRawTransaction struct {
|
|
Method string `json:"method"`
|
|
Params []string `json:"params"`
|
|
}
|
|
|
|
type ResSendRawTransaction struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result string `json:"result"`
|
|
}
|
|
|
|
// getmempoolentry
|
|
|
|
type CmdGetMempoolEntry struct {
|
|
Method string `json:"method"`
|
|
Params []string `json:"params"`
|
|
}
|
|
|
|
type ResGetMempoolEntry struct {
|
|
Error *bchain.RPCError `json:"error"`
|
|
Result *bchain.MempoolEntry `json:"result"`
|
|
}
|
|
|
|
// GetBestBlockHash returns hash of the tip of the best-block-chain.
|
|
func (b *BitcoinRPC) GetBestBlockHash() (string, error) {
|
|
|
|
glog.V(1).Info("rpc: getbestblockhash")
|
|
|
|
res := ResGetBestBlockHash{}
|
|
req := CmdGetBestBlockHash{Method: "getbestblockhash"}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if res.Error != nil {
|
|
return "", res.Error
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// GetBestBlockHeight returns height of the tip of the best-block-chain.
|
|
func (b *BitcoinRPC) GetBestBlockHeight() (uint32, error) {
|
|
glog.V(1).Info("rpc: getblockcount")
|
|
|
|
res := ResGetBlockCount{}
|
|
req := CmdGetBlockCount{Method: "getblockcount"}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if res.Error != nil {
|
|
return 0, res.Error
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// GetBlockChainInfo returns the name of the block chain: main/test/regtest.
|
|
func (b *BitcoinRPC) GetBlockChainInfo() (string, error) {
|
|
glog.V(1).Info("rpc: getblockchaininfo")
|
|
|
|
res := ResGetBlockChainInfo{}
|
|
req := CmdGetBlockChainInfo{Method: "getblockchaininfo"}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if res.Error != nil {
|
|
return "", res.Error
|
|
}
|
|
return res.Result.Chain, nil
|
|
}
|
|
|
|
func isErrBlockNotFound(err *bchain.RPCError) bool {
|
|
return err.Message == "Block not found" ||
|
|
err.Message == "Block height out of range"
|
|
}
|
|
|
|
// GetBlockHash returns hash of block in best-block-chain at given height.
|
|
func (b *BitcoinRPC) GetBlockHash(height uint32) (string, error) {
|
|
glog.V(1).Info("rpc: getblockhash ", height)
|
|
|
|
res := ResGetBlockHash{}
|
|
req := CmdGetBlockHash{Method: "getblockhash"}
|
|
req.Params.Height = height
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return "", errors.Annotatef(err, "height %v", height)
|
|
}
|
|
if res.Error != nil {
|
|
if isErrBlockNotFound(res.Error) {
|
|
return "", bchain.ErrBlockNotFound
|
|
}
|
|
return "", errors.Annotatef(res.Error, "height %v", height)
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// GetBlockHeader returns header of block with given hash.
|
|
func (b *BitcoinRPC) GetBlockHeader(hash string) (*bchain.BlockHeader, error) {
|
|
glog.V(1).Info("rpc: getblockheader")
|
|
|
|
res := ResGetBlockHeader{}
|
|
req := CmdGetBlockHeader{Method: "getblockheader"}
|
|
req.Params.BlockHash = hash
|
|
req.Params.Verbose = true
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "hash %v", hash)
|
|
}
|
|
if res.Error != nil {
|
|
if isErrBlockNotFound(res.Error) {
|
|
return nil, bchain.ErrBlockNotFound
|
|
}
|
|
return nil, errors.Annotatef(res.Error, "hash %v", hash)
|
|
}
|
|
return &res.Result, nil
|
|
}
|
|
|
|
// GetBlock returns block with given hash.
|
|
func (b *BitcoinRPC) GetBlock(hash string, height uint32) (*bchain.Block, error) {
|
|
var err error
|
|
if hash == "" && height > 0 {
|
|
hash, err = b.GetBlockHash(height)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if !b.ParseBlocks {
|
|
return b.GetBlockFull(hash)
|
|
}
|
|
// optimization
|
|
if height > 0 {
|
|
return b.GetBlockWithoutHeader(hash, height)
|
|
}
|
|
header, err := b.GetBlockHeader(hash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
data, err := b.GetBlockRaw(hash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
block, err := b.Parser.ParseBlock(data)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "hash %v", hash)
|
|
}
|
|
block.BlockHeader = *header
|
|
return block, nil
|
|
}
|
|
|
|
// getBlockWithoutHeader is an optimization - it does not call GetBlockHeader to get prev, next hashes
|
|
// instead it sets to header only block hash and height passed in parameters
|
|
func (b *BitcoinRPC) GetBlockWithoutHeader(hash string, height uint32) (*bchain.Block, error) {
|
|
data, err := b.GetBlockRaw(hash)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
block, err := b.Parser.ParseBlock(data)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "%v %v", height, hash)
|
|
}
|
|
block.BlockHeader.Hash = hash
|
|
block.BlockHeader.Height = height
|
|
return block, nil
|
|
}
|
|
|
|
// GetBlockRaw returns block with given hash as bytes.
|
|
func (b *BitcoinRPC) GetBlockRaw(hash string) ([]byte, error) {
|
|
glog.V(1).Info("rpc: getblock (verbosity=0) ", hash)
|
|
|
|
res := ResGetBlockRaw{}
|
|
req := CmdGetBlock{Method: "getblock"}
|
|
req.Params.BlockHash = hash
|
|
req.Params.Verbosity = 0
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "hash %v", hash)
|
|
}
|
|
if res.Error != nil {
|
|
if isErrBlockNotFound(res.Error) {
|
|
return nil, bchain.ErrBlockNotFound
|
|
}
|
|
return nil, errors.Annotatef(res.Error, "hash %v", hash)
|
|
}
|
|
return hex.DecodeString(res.Result)
|
|
}
|
|
|
|
// GetBlockFull returns block with given hash.
|
|
func (b *BitcoinRPC) GetBlockFull(hash string) (*bchain.Block, error) {
|
|
glog.V(1).Info("rpc: getblock (verbosity=2) ", hash)
|
|
|
|
res := ResGetBlockFull{}
|
|
req := CmdGetBlock{Method: "getblock"}
|
|
req.Params.BlockHash = hash
|
|
req.Params.Verbosity = 2
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "hash %v", hash)
|
|
}
|
|
if res.Error != nil {
|
|
if isErrBlockNotFound(res.Error) {
|
|
return nil, bchain.ErrBlockNotFound
|
|
}
|
|
return nil, errors.Annotatef(res.Error, "hash %v", hash)
|
|
}
|
|
return &res.Result, nil
|
|
}
|
|
|
|
// GetMempool returns transactions in mempool.
|
|
func (b *BitcoinRPC) GetMempool() ([]string, error) {
|
|
glog.V(1).Info("rpc: getrawmempool")
|
|
|
|
res := ResGetMempool{}
|
|
req := CmdGetMempool{Method: "getrawmempool"}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if res.Error != nil {
|
|
return nil, res.Error
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// GetTransactionForMempool returns a transaction by the transaction ID.
|
|
// It could be optimized for mempool, i.e. without block time and confirmations
|
|
func (b *BitcoinRPC) GetTransactionForMempool(txid string) (*bchain.Tx, error) {
|
|
glog.V(1).Info("rpc: getrawtransaction nonverbose ", txid)
|
|
|
|
res := ResGetRawTransactionNonverbose{}
|
|
req := CmdGetRawTransaction{Method: "getrawtransaction"}
|
|
req.Params.Txid = txid
|
|
req.Params.Verbose = false
|
|
err := b.Call(&req, &res)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "txid %v", txid)
|
|
}
|
|
if res.Error != nil {
|
|
return nil, errors.Annotatef(res.Error, "txid %v", txid)
|
|
}
|
|
data, err := hex.DecodeString(res.Result)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "txid %v", txid)
|
|
}
|
|
tx, err := b.Parser.ParseTx(data)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "txid %v", txid)
|
|
}
|
|
return tx, nil
|
|
}
|
|
|
|
// GetTransaction returns a transaction by the transaction ID.
|
|
func (b *BitcoinRPC) GetTransaction(txid string) (*bchain.Tx, error) {
|
|
glog.V(1).Info("rpc: getrawtransaction ", txid)
|
|
|
|
res := ResGetRawTransaction{}
|
|
req := CmdGetRawTransaction{Method: "getrawtransaction"}
|
|
req.Params.Txid = txid
|
|
req.Params.Verbose = true
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "txid %v", txid)
|
|
}
|
|
if res.Error != nil {
|
|
return nil, errors.Annotatef(res.Error, "txid %v", txid)
|
|
}
|
|
tx, err := b.Parser.ParseTxFromJson(res.Result)
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "txid %v", txid)
|
|
}
|
|
return tx, nil
|
|
}
|
|
|
|
// ResyncMempool gets mempool transactions and maps output scripts to transactions.
|
|
// ResyncMempool is not reentrant, it should be called from a single thread.
|
|
// It returns number of transactions in mempool
|
|
func (b *BitcoinRPC) ResyncMempool(onNewTxAddr func(txid string, addr string, isOutput bool)) (int, error) {
|
|
return b.Mempool.Resync(onNewTxAddr)
|
|
}
|
|
|
|
// GetMempoolTransactions returns slice of mempool transactions for given address.
|
|
func (b *BitcoinRPC) GetMempoolTransactions(address string) ([]string, error) {
|
|
return b.Mempool.GetTransactions(address)
|
|
}
|
|
|
|
// EstimateSmartFee returns fee estimation.
|
|
func (b *BitcoinRPC) EstimateSmartFee(blocks int, conservative bool) (float64, error) {
|
|
glog.V(1).Info("rpc: estimatesmartfee ", blocks)
|
|
|
|
res := ResEstimateSmartFee{}
|
|
req := CmdEstimateSmartFee{Method: "estimatesmartfee"}
|
|
req.Params.ConfTarget = blocks
|
|
if conservative {
|
|
req.Params.EstimateMode = "CONSERVATIVE"
|
|
} else {
|
|
req.Params.EstimateMode = "ECONOMICAL"
|
|
}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if res.Error != nil {
|
|
return 0, res.Error
|
|
}
|
|
return res.Result.Feerate, nil
|
|
}
|
|
|
|
// EstimateFee returns fee estimation.
|
|
func (b *BitcoinRPC) EstimateFee(blocks int) (float64, error) {
|
|
glog.V(1).Info("rpc: estimatefee ", blocks)
|
|
|
|
res := ResEstimateFee{}
|
|
req := CmdEstimateFee{Method: "estimatefee"}
|
|
req.Params.Blocks = blocks
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if res.Error != nil {
|
|
return 0, res.Error
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// SendRawTransaction sends raw transaction.
|
|
func (b *BitcoinRPC) SendRawTransaction(tx string) (string, error) {
|
|
glog.V(1).Info("rpc: sendrawtransaction")
|
|
|
|
res := ResSendRawTransaction{}
|
|
req := CmdSendRawTransaction{Method: "sendrawtransaction"}
|
|
req.Params = []string{tx}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if res.Error != nil {
|
|
return "", res.Error
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// GetMempoolEntry returns mempool data for given transaction
|
|
func (b *BitcoinRPC) GetMempoolEntry(txid string) (*bchain.MempoolEntry, error) {
|
|
glog.V(1).Info("rpc: getmempoolentry")
|
|
|
|
res := ResGetMempoolEntry{}
|
|
req := CmdGetMempoolEntry{
|
|
Method: "getmempoolentry",
|
|
Params: []string{txid},
|
|
}
|
|
err := b.Call(&req, &res)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if res.Error != nil {
|
|
return nil, res.Error
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
func safeDecodeResponse(body io.ReadCloser, res interface{}) (err error) {
|
|
var data []byte
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
glog.Error("unmarshal json recovered from panic: ", r, "; data: ", string(data))
|
|
if len(data) > 0 && len(data) < 2048 {
|
|
err = errors.Errorf("Error: ", string(data))
|
|
} else {
|
|
err = errors.New("Internal error")
|
|
}
|
|
}
|
|
}()
|
|
data, err = ioutil.ReadAll(body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return json.Unmarshal(data, &res)
|
|
}
|
|
|
|
func (b *BitcoinRPC) Call(req interface{}, res interface{}) error {
|
|
httpData, err := b.RPCMarshaler.Marshal(req)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
httpReq, err := http.NewRequest("POST", b.rpcURL, bytes.NewBuffer(httpData))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
httpReq.SetBasicAuth(b.user, b.password)
|
|
httpRes, err := b.client.Do(httpReq)
|
|
// in some cases the httpRes can contain data even if it returns error
|
|
// see http://devs.cloudimmunity.com/gotchas-and-common-mistakes-in-go-golang/
|
|
if httpRes != nil {
|
|
defer httpRes.Body.Close()
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// if server returns HTTP error code it might not return json with response
|
|
// handle both cases
|
|
if httpRes.StatusCode != 200 {
|
|
err = safeDecodeResponse(httpRes.Body, &res)
|
|
if err != nil {
|
|
return errors.Errorf("%v %v", httpRes.Status, err)
|
|
}
|
|
return nil
|
|
}
|
|
return safeDecodeResponse(httpRes.Body, &res)
|
|
}
|
|
|
|
// GetChainParser returns BlockChainParser
|
|
func (b *BitcoinRPC) GetChainParser() bchain.BlockChainParser {
|
|
return b.Parser
|
|
}
|