github.com/cerberus-wallet/blockbook@v0.3.2/bchain/coins/zec/zcashrpc.go (about)

     1  package zec
     2  
     3  import (
     4  	"blockbook/bchain"
     5  	"blockbook/bchain/coins/btc"
     6  	"encoding/json"
     7  
     8  	"github.com/golang/glog"
     9  	"github.com/juju/errors"
    10  )
    11  
    12  // ZCashRPC is an interface to JSON-RPC bitcoind service
    13  type ZCashRPC struct {
    14  	*btc.BitcoinRPC
    15  }
    16  
    17  // NewZCashRPC returns new ZCashRPC instance
    18  func NewZCashRPC(config json.RawMessage, pushHandler func(bchain.NotificationType)) (bchain.BlockChain, error) {
    19  	b, err := btc.NewBitcoinRPC(config, pushHandler)
    20  	if err != nil {
    21  		return nil, err
    22  	}
    23  	z := &ZCashRPC{
    24  		BitcoinRPC: b.(*btc.BitcoinRPC),
    25  	}
    26  	z.RPCMarshaler = btc.JSONMarshalerV1{}
    27  	z.ChainConfig.SupportsEstimateSmartFee = false
    28  	return z, nil
    29  }
    30  
    31  // Initialize initializes ZCashRPC instance
    32  func (z *ZCashRPC) Initialize() error {
    33  	ci, err := z.GetChainInfo()
    34  	if err != nil {
    35  		return err
    36  	}
    37  	chainName := ci.Chain
    38  
    39  	params := GetChainParams(chainName)
    40  
    41  	z.Parser = NewZCashParser(params, z.ChainConfig)
    42  
    43  	// parameters for getInfo request
    44  	if params.Net == MainnetMagic {
    45  		z.Testnet = false
    46  		z.Network = "livenet"
    47  	} else {
    48  		z.Testnet = true
    49  		z.Network = "testnet"
    50  	}
    51  
    52  	glog.Info("rpc: block chain ", params.Name)
    53  
    54  	return nil
    55  }
    56  
    57  // GetBlock returns block with given hash.
    58  func (z *ZCashRPC) GetBlock(hash string, height uint32) (*bchain.Block, error) {
    59  	var err error
    60  	if hash == "" && height > 0 {
    61  		hash, err = z.GetBlockHash(height)
    62  		if err != nil {
    63  			return nil, err
    64  		}
    65  	}
    66  
    67  	glog.V(1).Info("rpc: getblock (verbosity=1) ", hash)
    68  
    69  	res := btc.ResGetBlockThin{}
    70  	req := btc.CmdGetBlock{Method: "getblock"}
    71  	req.Params.BlockHash = hash
    72  	req.Params.Verbosity = 1
    73  	err = z.Call(&req, &res)
    74  
    75  	if err != nil {
    76  		return nil, errors.Annotatef(err, "hash %v", hash)
    77  	}
    78  	if res.Error != nil {
    79  		return nil, errors.Annotatef(res.Error, "hash %v", hash)
    80  	}
    81  
    82  	txs := make([]bchain.Tx, 0, len(res.Result.Txids))
    83  	for _, txid := range res.Result.Txids {
    84  		tx, err := z.GetTransaction(txid)
    85  		if err != nil {
    86  			if err == bchain.ErrTxNotFound {
    87  				glog.Errorf("rpc: getblock: skipping transanction in block %s due error: %s", hash, err)
    88  				continue
    89  			}
    90  			return nil, err
    91  		}
    92  		txs = append(txs, *tx)
    93  	}
    94  	block := &bchain.Block{
    95  		BlockHeader: res.Result.BlockHeader,
    96  		Txs:         txs,
    97  	}
    98  	return block, nil
    99  }
   100  
   101  // GetTransactionForMempool returns a transaction by the transaction ID.
   102  // It could be optimized for mempool, i.e. without block time and confirmations
   103  func (z *ZCashRPC) GetTransactionForMempool(txid string) (*bchain.Tx, error) {
   104  	return z.GetTransaction(txid)
   105  }
   106  
   107  // GetMempoolEntry returns mempool data for given transaction
   108  func (z *ZCashRPC) GetMempoolEntry(txid string) (*bchain.MempoolEntry, error) {
   109  	return nil, errors.New("GetMempoolEntry: not implemented")
   110  }
   111  
   112  func isErrBlockNotFound(err *bchain.RPCError) bool {
   113  	return err.Message == "Block not found" ||
   114  		err.Message == "Block height out of range"
   115  }