github.com/bchainhub/blockbook@v0.3.2/bchain/coins/flo/florpc.go (about)

     1  package flo
     2  
     3  import (
     4  	"blockbook/bchain"
     5  	"blockbook/bchain/coins/btc"
     6  	"encoding/json"
     7  
     8  	"github.com/juju/errors"
     9  
    10  	"github.com/golang/glog"
    11  )
    12  
    13  // FloRPC is an interface to JSON-RPC bitcoind service.
    14  type FloRPC struct {
    15  	*btc.BitcoinRPC
    16  }
    17  
    18  // NewFloRPC returns new FloRPC instance.
    19  func NewFloRPC(config json.RawMessage, pushHandler func(bchain.NotificationType)) (bchain.BlockChain, error) {
    20  	b, err := btc.NewBitcoinRPC(config, pushHandler)
    21  	if err != nil {
    22  		return nil, err
    23  	}
    24  
    25  	s := &FloRPC{
    26  		b.(*btc.BitcoinRPC),
    27  	}
    28  	s.RPCMarshaler = btc.JSONMarshalerV2{}
    29  	s.ChainConfig.SupportsEstimateFee = false
    30  
    31  	return s, nil
    32  }
    33  
    34  // Initialize initializes FloRPC instance.
    35  func (f *FloRPC) Initialize() error {
    36  	ci, err := f.GetChainInfo()
    37  	if err != nil {
    38  		return err
    39  	}
    40  	chainName := ci.Chain
    41  
    42  	glog.Info("Chain name ", chainName)
    43  	params := GetChainParams(chainName)
    44  
    45  	// always create parser
    46  	f.Parser = NewFloParser(params, f.ChainConfig)
    47  
    48  	// parameters for getInfo request
    49  	if params.Net == MainnetMagic {
    50  		f.Testnet = false
    51  		f.Network = "livenet"
    52  	} else {
    53  		f.Testnet = true
    54  		f.Network = "testnet"
    55  	}
    56  
    57  	glog.Info("rpc: block chain ", params.Name)
    58  
    59  	return nil
    60  }
    61  
    62  // GetBlock returns block with given hash.
    63  func (f *FloRPC) GetBlock(hash string, height uint32) (*bchain.Block, error) {
    64  	var err error
    65  	if hash == "" {
    66  		hash, err = f.GetBlockHash(height)
    67  		if err != nil {
    68  			return nil, err
    69  		}
    70  	}
    71  	if !f.ParseBlocks {
    72  		return f.GetBlockFull(hash)
    73  	}
    74  	// optimization
    75  	if height > 0 {
    76  		return f.GetBlockWithoutHeader(hash, height)
    77  	}
    78  	header, err := f.GetBlockHeader(hash)
    79  	if err != nil {
    80  		return nil, err
    81  	}
    82  	data, err := f.GetBlockRaw(hash)
    83  	if err != nil {
    84  		return nil, err
    85  	}
    86  	block, err := f.Parser.ParseBlock(data)
    87  	if err != nil {
    88  		return nil, errors.Annotatef(err, "hash %v", hash)
    89  	}
    90  	block.BlockHeader = *header
    91  	return block, nil
    92  }
    93  
    94  // GetBlockFull returns block with given hash
    95  func (f *FloRPC) GetBlockFull(hash string) (*bchain.Block, error) {
    96  	glog.V(1).Info("rpc: getblock (verbosity=2) ", hash)
    97  
    98  	res := btc.ResGetBlockFull{}
    99  	req := btc.CmdGetBlock{Method: "getblock"}
   100  	req.Params.BlockHash = hash
   101  	req.Params.Verbosity = 2
   102  	err := f.Call(&req, &res)
   103  
   104  	if err != nil {
   105  		return nil, errors.Annotatef(err, "hash %v", hash)
   106  	}
   107  	if res.Error != nil {
   108  		if btc.IsErrBlockNotFound(res.Error) {
   109  			return nil, bchain.ErrBlockNotFound
   110  		}
   111  		return nil, errors.Annotatef(res.Error, "hash %v", hash)
   112  	}
   113  
   114  	for i := range res.Result.Txs {
   115  		tx := &res.Result.Txs[i]
   116  		for j := range tx.Vout {
   117  			vout := &tx.Vout[j]
   118  			// convert vout.JsonValue to big.Int and clear it, it is only temporary value used for unmarshal
   119  			vout.ValueSat, err = f.Parser.AmountToBigInt(vout.JsonValue)
   120  			if err != nil {
   121  				return nil, err
   122  			}
   123  			vout.JsonValue = ""
   124  		}
   125  	}
   126  
   127  	return &res.Result, nil
   128  }
   129  
   130  // GetTransactionForMempool returns a transaction by the transaction ID.
   131  // It could be optimized for mempool, i.e. without block time and confirmations
   132  func (f *FloRPC) GetTransactionForMempool(txid string) (*bchain.Tx, error) {
   133  	return f.GetTransaction(txid)
   134  }