204 lines
4.6 KiB
Go
204 lines
4.6 KiB
Go
package bch
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import (
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"encoding/hex"
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"encoding/json"
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"math/big"
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"github.com/golang/glog"
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"github.com/juju/errors"
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"github.com/martinboehm/bchutil"
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"spacecruft.org/spacecruft/blockbook/bchain"
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"spacecruft.org/spacecruft/blockbook/bchain/coins/btc"
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)
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// BCashRPC is an interface to JSON-RPC bitcoind service.
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type BCashRPC struct {
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*btc.BitcoinRPC
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}
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// NewBCashRPC returns new BCashRPC instance.
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func NewBCashRPC(config json.RawMessage, pushHandler func(bchain.NotificationType)) (bchain.BlockChain, error) {
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b, err := btc.NewBitcoinRPC(config, pushHandler)
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if err != nil {
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return nil, err
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}
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s := &BCashRPC{
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b.(*btc.BitcoinRPC),
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}
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s.ChainConfig.SupportsEstimateSmartFee = false
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return s, nil
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}
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// Initialize initializes BCashRPC instance.
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func (b *BCashRPC) Initialize() error {
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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, err = NewBCashParser(params, b.ChainConfig)
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if err != nil {
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return err
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}
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// parameters for getInfo request
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if params.Net == bchutil.MainnetMagic {
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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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// 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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Verbose bool `json:"verbose"`
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} `json:"params"`
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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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Blocks int `json:"nblocks"`
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} `json:"params"`
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}
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// GetBlock returns block with given hash.
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func (b *BCashRPC) GetBlock(hash string, height uint32) (*bchain.Block, error) {
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var err error
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if hash == "" && height > 0 {
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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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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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// size is not returned by GetBlockHeader and would be overwritten
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size := block.Size
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block.BlockHeader = *header
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block.Size = size
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return block, nil
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}
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// GetBlockRaw returns block with given hash as bytes.
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func (b *BCashRPC) GetBlockRaw(hash string) ([]byte, error) {
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glog.V(1).Info("rpc: getblock (verbose=0) ", hash)
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res := btc.ResGetBlockRaw{}
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req := cmdGetBlock{Method: "getblock"}
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req.Params.BlockHash = hash
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req.Params.Verbose = false
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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 hex.DecodeString(res.Result)
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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 *BCashRPC) GetBlockInfo(hash string) (*bchain.BlockInfo, error) {
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glog.V(1).Info("rpc: getblock (verbosity=1) ", hash)
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res := btc.ResGetBlockInfo{}
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req := cmdGetBlock{Method: "getblock"}
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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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// GetBlockFull returns block with given hash.
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func (b *BCashRPC) GetBlockFull(hash string) (*bchain.Block, error) {
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return nil, errors.New("Not implemented")
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}
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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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// EstimateFee returns fee estimation
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func (b *BCashRPC) EstimateFee(blocks int) (big.Int, error) {
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// from version BitcoinABC version 0.19.1 EstimateFee does not support parameter Blocks
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if b.ChainConfig.CoinShortcut == "BCHSV" {
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return b.BitcoinRPC.EstimateFee(blocks)
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}
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glog.V(1).Info("rpc: estimatefee ", blocks)
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res := btc.ResEstimateFee{}
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req := struct {
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Method string `json:"method"`
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}{
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Method: "estimatefee",
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}
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err := b.Call(&req, &res)
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var r big.Int
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if err != nil {
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return r, err
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}
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if res.Error != nil {
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return r, res.Error
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}
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r, err = b.Parser.AmountToBigInt(res.Result)
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if err != nil {
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return r, err
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}
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return r, nil
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}
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// EstimateSmartFee returns fee estimation
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func (b *BCashRPC) EstimateSmartFee(blocks int, conservative bool) (big.Int, error) {
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// EstimateSmartFee is not supported by bcash
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return b.EstimateFee(blocks)
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}
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