900 lines
23 KiB
Go
900 lines
23 KiB
Go
package btc
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import (
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"blockbook/bchain"
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"bytes"
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"context"
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"encoding/hex"
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"encoding/json"
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"io"
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"io/ioutil"
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"math/big"
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"net"
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"net/http"
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"runtime/debug"
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"time"
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"github.com/golang/glog"
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"github.com/juju/errors"
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"github.com/martinboehm/btcd/wire"
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)
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// BitcoinRPC is an interface to JSON-RPC bitcoind service.
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type BitcoinRPC struct {
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*bchain.BaseChain
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client http.Client
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rpcURL string
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user string
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password string
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Mempool *bchain.MempoolBitcoinType
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ParseBlocks bool
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pushHandler func(bchain.NotificationType)
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mq *bchain.MQ
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ChainConfig *Configuration
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RPCMarshaler RPCMarshaler
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}
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// Configuration represents json config file
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type Configuration struct {
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CoinName string `json:"coin_name"`
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CoinShortcut string `json:"coin_shortcut"`
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RPCURL string `json:"rpc_url"`
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RPCUser string `json:"rpc_user"`
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RPCPass string `json:"rpc_pass"`
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RPCTimeout int `json:"rpc_timeout"`
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Parse bool `json:"parse"`
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MessageQueueBinding string `json:"message_queue_binding"`
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Subversion string `json:"subversion"`
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BlockAddressesToKeep int `json:"block_addresses_to_keep"`
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MempoolWorkers int `json:"mempool_workers"`
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MempoolSubWorkers int `json:"mempool_sub_workers"`
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AddressFormat string `json:"address_format"`
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SupportsEstimateFee bool `json:"supports_estimate_fee"`
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SupportsEstimateSmartFee bool `json:"supports_estimate_smart_fee"`
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XPubMagic uint32 `json:"xpub_magic,omitempty"`
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XPubMagicSegwitP2sh uint32 `json:"xpub_magic_segwit_p2sh,omitempty"`
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XPubMagicSegwitNative uint32 `json:"xpub_magic_segwit_native,omitempty"`
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Slip44 uint32 `json:"slip44,omitempty"`
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}
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// NewBitcoinRPC returns new BitcoinRPC instance.
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func NewBitcoinRPC(config json.RawMessage, pushHandler func(bchain.NotificationType)) (bchain.BlockChain, error) {
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var err error
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var c Configuration
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err = json.Unmarshal(config, &c)
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if err != nil {
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return nil, errors.Annotatef(err, "Invalid configuration file")
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}
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// keep at least 100 mappings block->addresses to allow rollback
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if c.BlockAddressesToKeep < 100 {
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c.BlockAddressesToKeep = 100
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}
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// at least 1 mempool worker/subworker for synchronous mempool synchronization
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if c.MempoolWorkers < 1 {
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c.MempoolWorkers = 1
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}
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if c.MempoolSubWorkers < 1 {
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c.MempoolSubWorkers = 1
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}
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// btc supports both calls, other coins overriding BitcoinRPC can change this
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c.SupportsEstimateFee = true
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c.SupportsEstimateSmartFee = true
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transport := &http.Transport{
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Dial: (&net.Dialer{KeepAlive: 600 * time.Second}).Dial,
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MaxIdleConns: 100,
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MaxIdleConnsPerHost: 100, // necessary to not to deplete ports
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}
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s := &BitcoinRPC{
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BaseChain: &bchain.BaseChain{},
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client: http.Client{Timeout: time.Duration(c.RPCTimeout) * time.Second, Transport: transport},
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rpcURL: c.RPCURL,
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user: c.RPCUser,
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password: c.RPCPass,
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ParseBlocks: c.Parse,
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ChainConfig: &c,
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pushHandler: pushHandler,
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RPCMarshaler: JSONMarshalerV2{},
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}
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return s, nil
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}
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// Initialize initializes BitcoinRPC instance.
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func (b *BitcoinRPC) Initialize() error {
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b.ChainConfig.SupportsEstimateFee = false
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ci, err := b.GetChainInfo()
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if err != nil {
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return err
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}
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chainName := ci.Chain
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params := GetChainParams(chainName)
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// always create parser
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b.Parser = NewBitcoinParser(params, b.ChainConfig)
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// parameters for getInfo request
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if params.Net == wire.MainNet {
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b.Testnet = false
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b.Network = "livenet"
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} else {
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b.Testnet = true
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b.Network = "testnet"
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}
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glog.Info("rpc: block chain ", params.Name)
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return nil
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}
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// CreateMempool creates mempool if not already created, however does not initialize it
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func (b *BitcoinRPC) CreateMempool() (bchain.Mempool, error) {
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if b.Mempool == nil {
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b.Mempool = bchain.NewMempoolBitcoinType(b, b.ChainConfig.MempoolWorkers, b.ChainConfig.MempoolSubWorkers)
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}
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return b.Mempool, nil
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}
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// InitializeMempool creates ZeroMQ subscription and sets AddrDescForOutpointFunc to the Mempool
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func (b *BitcoinRPC) InitializeMempool(addrDescForOutpoint bchain.AddrDescForOutpointFunc) error {
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if b.Mempool == nil {
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return errors.New("Mempool not created")
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}
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b.Mempool.AddrDescForOutpoint = addrDescForOutpoint
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if b.mq == nil {
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mq, err := bchain.NewMQ(b.ChainConfig.MessageQueueBinding, b.pushHandler)
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if err != nil {
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glog.Error("mq: ", err)
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return err
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}
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b.mq = mq
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}
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return nil
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}
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// Shutdown ZeroMQ and other resources
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func (b *BitcoinRPC) Shutdown(ctx context.Context) error {
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if b.mq != nil {
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if err := b.mq.Shutdown(ctx); err != nil {
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glog.Error("MQ.Shutdown error: ", err)
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return err
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}
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}
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return nil
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}
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// GetCoinName returns the coin name
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func (b *BitcoinRPC) GetCoinName() string {
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return b.ChainConfig.CoinName
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}
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// GetSubversion returns the backend subversion
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func (b *BitcoinRPC) GetSubversion() string {
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return b.ChainConfig.Subversion
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}
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// getblockhash
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type CmdGetBlockHash struct {
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Method string `json:"method"`
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Params struct {
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Height uint32 `json:"height"`
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} `json:"params"`
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}
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type ResGetBlockHash struct {
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Error *bchain.RPCError `json:"error"`
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Result string `json:"result"`
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}
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// getbestblockhash
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type CmdGetBestBlockHash struct {
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Method string `json:"method"`
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}
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type ResGetBestBlockHash struct {
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Error *bchain.RPCError `json:"error"`
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Result string `json:"result"`
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}
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// getblockcount
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type CmdGetBlockCount struct {
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Method string `json:"method"`
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}
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type ResGetBlockCount struct {
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Error *bchain.RPCError `json:"error"`
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Result uint32 `json:"result"`
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}
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// getblockchaininfo
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type CmdGetBlockChainInfo struct {
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Method string `json:"method"`
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}
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type ResGetBlockChainInfo struct {
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Error *bchain.RPCError `json:"error"`
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Result struct {
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Chain string `json:"chain"`
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Blocks int `json:"blocks"`
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Headers int `json:"headers"`
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Bestblockhash string `json:"bestblockhash"`
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Difficulty json.Number `json:"difficulty"`
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SizeOnDisk int64 `json:"size_on_disk"`
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Warnings string `json:"warnings"`
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} `json:"result"`
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}
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// getnetworkinfo
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type CmdGetNetworkInfo struct {
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Method string `json:"method"`
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}
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type ResGetNetworkInfo struct {
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Error *bchain.RPCError `json:"error"`
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Result struct {
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Version json.Number `json:"version"`
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Subversion json.Number `json:"subversion"`
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ProtocolVersion json.Number `json:"protocolversion"`
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Timeoffset float64 `json:"timeoffset"`
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Warnings string `json:"warnings"`
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} `json:"result"`
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}
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// getrawmempool
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type CmdGetMempool struct {
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Method string `json:"method"`
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}
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type ResGetMempool struct {
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Error *bchain.RPCError `json:"error"`
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Result []string `json:"result"`
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}
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// getblockheader
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type CmdGetBlockHeader struct {
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Method string `json:"method"`
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Params struct {
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BlockHash string `json:"blockhash"`
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Verbose bool `json:"verbose"`
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} `json:"params"`
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}
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type ResGetBlockHeader struct {
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Error *bchain.RPCError `json:"error"`
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Result bchain.BlockHeader `json:"result"`
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}
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// getblock
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type CmdGetBlock struct {
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Method string `json:"method"`
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Params struct {
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BlockHash string `json:"blockhash"`
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Verbosity int `json:"verbosity"`
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} `json:"params"`
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}
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type ResGetBlockRaw struct {
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Error *bchain.RPCError `json:"error"`
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Result string `json:"result"`
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}
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type BlockThin struct {
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bchain.BlockHeader
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Txids []string `json:"tx"`
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}
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type ResGetBlockThin struct {
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Error *bchain.RPCError `json:"error"`
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Result BlockThin `json:"result"`
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}
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type ResGetBlockFull struct {
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Error *bchain.RPCError `json:"error"`
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Result bchain.Block `json:"result"`
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}
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type ResGetBlockInfo struct {
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Error *bchain.RPCError `json:"error"`
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Result bchain.BlockInfo `json:"result"`
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}
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// getrawtransaction
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type CmdGetRawTransaction struct {
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Method string `json:"method"`
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Params struct {
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Txid string `json:"txid"`
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Verbose bool `json:"verbose"`
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} `json:"params"`
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}
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type ResGetRawTransaction struct {
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Error *bchain.RPCError `json:"error"`
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Result json.RawMessage `json:"result"`
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}
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type ResGetRawTransactionNonverbose struct {
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Error *bchain.RPCError `json:"error"`
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Result string `json:"result"`
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}
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// estimatesmartfee
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type CmdEstimateSmartFee struct {
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Method string `json:"method"`
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Params struct {
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ConfTarget int `json:"conf_target"`
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EstimateMode string `json:"estimate_mode"`
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} `json:"params"`
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}
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type ResEstimateSmartFee struct {
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Error *bchain.RPCError `json:"error"`
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Result struct {
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Feerate json.Number `json:"feerate"`
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Blocks int `json:"blocks"`
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} `json:"result"`
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}
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// estimatefee
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type CmdEstimateFee struct {
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Method string `json:"method"`
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Params struct {
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Blocks int `json:"nblocks"`
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} `json:"params"`
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}
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type ResEstimateFee struct {
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Error *bchain.RPCError `json:"error"`
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Result json.Number `json:"result"`
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}
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// sendrawtransaction
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type CmdSendRawTransaction struct {
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Method string `json:"method"`
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Params []string `json:"params"`
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}
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type ResSendRawTransaction struct {
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Error *bchain.RPCError `json:"error"`
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Result string `json:"result"`
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}
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// getmempoolentry
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type CmdGetMempoolEntry struct {
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Method string `json:"method"`
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Params []string `json:"params"`
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}
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type ResGetMempoolEntry struct {
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Error *bchain.RPCError `json:"error"`
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Result *bchain.MempoolEntry `json:"result"`
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}
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// GetBestBlockHash returns hash of the tip of the best-block-chain.
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func (b *BitcoinRPC) GetBestBlockHash() (string, error) {
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glog.V(1).Info("rpc: getbestblockhash")
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res := ResGetBestBlockHash{}
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req := CmdGetBestBlockHash{Method: "getbestblockhash"}
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err := b.Call(&req, &res)
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if err != nil {
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return "", err
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}
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if res.Error != nil {
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return "", res.Error
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}
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return res.Result, nil
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}
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// GetBestBlockHeight returns height of the tip of the best-block-chain.
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func (b *BitcoinRPC) GetBestBlockHeight() (uint32, error) {
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glog.V(1).Info("rpc: getblockcount")
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res := ResGetBlockCount{}
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req := CmdGetBlockCount{Method: "getblockcount"}
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err := b.Call(&req, &res)
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if err != nil {
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return 0, err
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}
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if res.Error != nil {
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return 0, res.Error
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}
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return res.Result, nil
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}
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// GetChainInfo returns information about the connected backend
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func (b *BitcoinRPC) GetChainInfo() (*bchain.ChainInfo, error) {
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glog.V(1).Info("rpc: getblockchaininfo")
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resCi := ResGetBlockChainInfo{}
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err := b.Call(&CmdGetBlockChainInfo{Method: "getblockchaininfo"}, &resCi)
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if err != nil {
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return nil, err
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}
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if resCi.Error != nil {
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return nil, resCi.Error
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}
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glog.V(1).Info("rpc: getnetworkinfo")
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resNi := ResGetNetworkInfo{}
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err = b.Call(&CmdGetNetworkInfo{Method: "getnetworkinfo"}, &resNi)
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if err != nil {
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return nil, err
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}
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if resNi.Error != nil {
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return nil, resNi.Error
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}
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rv := &bchain.ChainInfo{
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Bestblockhash: resCi.Result.Bestblockhash,
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Blocks: resCi.Result.Blocks,
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Chain: resCi.Result.Chain,
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Difficulty: string(resCi.Result.Difficulty),
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Headers: resCi.Result.Headers,
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SizeOnDisk: resCi.Result.SizeOnDisk,
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Subversion: string(resNi.Result.Subversion),
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Timeoffset: resNi.Result.Timeoffset,
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}
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rv.Version = string(resNi.Result.Version)
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rv.ProtocolVersion = string(resNi.Result.ProtocolVersion)
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if len(resCi.Result.Warnings) > 0 {
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rv.Warnings = resCi.Result.Warnings + " "
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}
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if resCi.Result.Warnings != resNi.Result.Warnings {
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rv.Warnings += resNi.Result.Warnings
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}
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return rv, nil
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}
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// IsErrBlockNotFound returns true if error means block was not found
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func IsErrBlockNotFound(err *bchain.RPCError) bool {
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return err.Message == "Block not found" ||
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err.Message == "Block height out of range"
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}
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// GetBlockHash returns hash of block in best-block-chain at given height.
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func (b *BitcoinRPC) GetBlockHash(height uint32) (string, error) {
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glog.V(1).Info("rpc: getblockhash ", height)
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res := ResGetBlockHash{}
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req := CmdGetBlockHash{Method: "getblockhash"}
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req.Params.Height = height
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err := b.Call(&req, &res)
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if err != nil {
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return "", errors.Annotatef(err, "height %v", height)
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}
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if res.Error != nil {
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if IsErrBlockNotFound(res.Error) {
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return "", bchain.ErrBlockNotFound
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}
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return "", errors.Annotatef(res.Error, "height %v", height)
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}
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return res.Result, nil
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}
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// GetBlockHeader returns header of block with given hash.
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func (b *BitcoinRPC) GetBlockHeader(hash string) (*bchain.BlockHeader, error) {
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glog.V(1).Info("rpc: getblockheader")
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res := ResGetBlockHeader{}
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req := CmdGetBlockHeader{Method: "getblockheader"}
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req.Params.BlockHash = hash
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req.Params.Verbose = true
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err := b.Call(&req, &res)
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if err != nil {
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return nil, errors.Annotatef(err, "hash %v", hash)
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}
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if res.Error != nil {
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if IsErrBlockNotFound(res.Error) {
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return nil, bchain.ErrBlockNotFound
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}
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return nil, errors.Annotatef(res.Error, "hash %v", hash)
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}
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return &res.Result, nil
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}
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// GetBlock returns block with given hash.
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func (b *BitcoinRPC) GetBlock(hash string, height uint32) (*bchain.Block, error) {
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var err error
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if hash == "" {
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hash, err = b.GetBlockHash(height)
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if err != nil {
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return nil, err
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}
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}
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if !b.ParseBlocks {
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return b.GetBlockFull(hash)
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}
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// optimization
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if height > 0 {
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return b.GetBlockWithoutHeader(hash, height)
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}
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header, err := b.GetBlockHeader(hash)
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if err != nil {
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return nil, err
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}
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data, err := b.GetBlockRaw(hash)
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if err != nil {
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return nil, err
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}
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block, err := b.Parser.ParseBlock(data)
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if err != nil {
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return nil, errors.Annotatef(err, "hash %v", hash)
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}
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block.BlockHeader = *header
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return block, nil
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}
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// GetBlockInfo returns extended header (more info than in bchain.BlockHeader) with a list of txids
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func (b *BitcoinRPC) GetBlockInfo(hash string) (*bchain.BlockInfo, error) {
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glog.V(1).Info("rpc: getblock (verbosity=1) ", hash)
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res := ResGetBlockInfo{}
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req := CmdGetBlock{Method: "getblock"}
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req.Params.BlockHash = hash
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req.Params.Verbosity = 1
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err := b.Call(&req, &res)
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if err != nil {
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return nil, errors.Annotatef(err, "hash %v", hash)
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}
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if res.Error != nil {
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if IsErrBlockNotFound(res.Error) {
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return nil, bchain.ErrBlockNotFound
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|
}
|
|
return nil, errors.Annotatef(res.Error, "hash %v", hash)
|
|
}
|
|
return &res.Result, 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)
|
|
}
|
|
|
|
for i := range res.Result.Txs {
|
|
tx := &res.Result.Txs[i]
|
|
for j := range tx.Vout {
|
|
vout := &tx.Vout[j]
|
|
// convert vout.JsonValue to big.Int and clear it, it is only temporary value used for unmarshal
|
|
vout.ValueSat, err = b.Parser.AmountToBigInt(vout.JsonValue)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
vout.JsonValue = ""
|
|
}
|
|
}
|
|
|
|
return &res.Result, nil
|
|
}
|
|
|
|
// GetMempoolTransactions returns transactions in mempool
|
|
func (b *BitcoinRPC) GetMempoolTransactions() ([]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
|
|
}
|
|
|
|
// IsMissingTx return true if error means missing tx
|
|
func IsMissingTx(err *bchain.RPCError) bool {
|
|
if err.Code == -5 { // "No such mempool or blockchain transaction"
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// 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 {
|
|
if IsMissingTx(res.Error) {
|
|
return nil, bchain.ErrTxNotFound
|
|
}
|
|
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) {
|
|
r, err := b.getRawTransaction(txid)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tx, err := b.Parser.ParseTxFromJson(r)
|
|
tx.CoinSpecificData = r
|
|
if err != nil {
|
|
return nil, errors.Annotatef(err, "txid %v", txid)
|
|
}
|
|
return tx, nil
|
|
}
|
|
|
|
// GetTransactionSpecific returns json as returned by backend, with all coin specific data
|
|
func (b *BitcoinRPC) GetTransactionSpecific(tx *bchain.Tx) (json.RawMessage, error) {
|
|
if csd, ok := tx.CoinSpecificData.(json.RawMessage); ok {
|
|
return csd, nil
|
|
}
|
|
return b.getRawTransaction(tx.Txid)
|
|
}
|
|
|
|
// getRawTransaction returns json as returned by backend, with all coin specific data
|
|
func (b *BitcoinRPC) getRawTransaction(txid string) (json.RawMessage, 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 {
|
|
if IsMissingTx(res.Error) {
|
|
return nil, bchain.ErrTxNotFound
|
|
}
|
|
return nil, errors.Annotatef(res.Error, "txid %v", txid)
|
|
}
|
|
return res.Result, nil
|
|
}
|
|
|
|
// EstimateSmartFee returns fee estimation
|
|
func (b *BitcoinRPC) EstimateSmartFee(blocks int, conservative bool) (big.Int, error) {
|
|
// use EstimateFee if EstimateSmartFee is not supported
|
|
if !b.ChainConfig.SupportsEstimateSmartFee && b.ChainConfig.SupportsEstimateFee {
|
|
return b.EstimateFee(blocks)
|
|
}
|
|
|
|
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)
|
|
|
|
var r big.Int
|
|
if err != nil {
|
|
return r, err
|
|
}
|
|
if res.Error != nil {
|
|
return r, res.Error
|
|
}
|
|
r, err = b.Parser.AmountToBigInt(res.Result.Feerate)
|
|
if err != nil {
|
|
return r, err
|
|
}
|
|
return r, nil
|
|
}
|
|
|
|
// EstimateFee returns fee estimation.
|
|
func (b *BitcoinRPC) EstimateFee(blocks int) (big.Int, error) {
|
|
// use EstimateSmartFee if EstimateFee is not supported
|
|
if !b.ChainConfig.SupportsEstimateFee && b.ChainConfig.SupportsEstimateSmartFee {
|
|
return b.EstimateSmartFee(blocks, true)
|
|
}
|
|
|
|
glog.V(1).Info("rpc: estimatefee ", blocks)
|
|
|
|
res := ResEstimateFee{}
|
|
req := CmdEstimateFee{Method: "estimatefee"}
|
|
req.Params.Blocks = blocks
|
|
err := b.Call(&req, &res)
|
|
|
|
var r big.Int
|
|
if err != nil {
|
|
return r, err
|
|
}
|
|
if res.Error != nil {
|
|
return r, res.Error
|
|
}
|
|
r, err = b.Parser.AmountToBigInt(res.Result)
|
|
if err != nil {
|
|
return r, err
|
|
}
|
|
return r, 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
|
|
}
|
|
res.Result.FeeSat, err = b.Parser.AmountToBigInt(res.Result.Fee)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
res.Result.ModifiedFeeSat, err = b.Parser.AmountToBigInt(res.Result.ModifiedFee)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
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))
|
|
debug.PrintStack()
|
|
if len(data) > 0 && len(data) < 2048 {
|
|
err = errors.Errorf("Error: %v", string(data))
|
|
} else {
|
|
err = errors.New("Internal error")
|
|
}
|
|
}
|
|
}()
|
|
data, err = ioutil.ReadAll(body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return json.Unmarshal(data, &res)
|
|
}
|
|
|
|
// Call calls Backend RPC interface, using RPCMarshaler interface to marshall the request
|
|
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)
|
|
}
|