github.com/trezor/blockbook@v0.4.1-0.20240328132726-e9a08582ee2c/bchain/coins/litecoin/litecoinrpc.go (about)

     1  package litecoin
     2  
     3  import (
     4  	"encoding/json"
     5  
     6  	"github.com/golang/glog"
     7  	"github.com/juju/errors"
     8  	"github.com/trezor/blockbook/bchain"
     9  	"github.com/trezor/blockbook/bchain/coins/btc"
    10  )
    11  
    12  // LitecoinRPC is an interface to JSON-RPC bitcoind service.
    13  type LitecoinRPC struct {
    14  	*btc.BitcoinRPC
    15  }
    16  
    17  // NewLitecoinRPC returns new LitecoinRPC instance.
    18  func NewLitecoinRPC(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  
    24  	s := &LitecoinRPC{
    25  		b.(*btc.BitcoinRPC),
    26  	}
    27  	s.RPCMarshaler = btc.JSONMarshalerV2{}
    28  	s.ChainConfig.SupportsEstimateFee = false
    29  
    30  	return s, nil
    31  }
    32  
    33  // Initialize initializes LitecoinRPC instance.
    34  func (b *LitecoinRPC) Initialize() error {
    35  	ci, err := b.GetChainInfo()
    36  	if err != nil {
    37  		return err
    38  	}
    39  	chainName := ci.Chain
    40  
    41  	glog.Info("Chain name ", chainName)
    42  	params := GetChainParams(chainName)
    43  
    44  	// always create parser
    45  	b.Parser = NewLitecoinParser(params, b.ChainConfig)
    46  
    47  	// parameters for getInfo request
    48  	if params.Net == MainnetMagic {
    49  		b.Testnet = false
    50  		b.Network = "livenet"
    51  	} else {
    52  		b.Testnet = true
    53  		b.Network = "testnet"
    54  	}
    55  
    56  	glog.Info("rpc: block chain ", params.Name)
    57  
    58  	return nil
    59  }
    60  
    61  // GetBlock returns block with given hash.
    62  // Litecoin cannot use optimized BitcoinRPC.GetBlock since v 0.21.2,
    63  // which introduced MWEB fields to the transaction data and made the serialized block incompatible with Bitcoin wire protocol
    64  func (b *LitecoinRPC) GetBlock(hash string, height uint32) (*bchain.Block, error) {
    65  	var err error
    66  	if hash == "" && height > 0 {
    67  		hash, err = b.GetBlockHash(height)
    68  		if err != nil {
    69  			return nil, err
    70  		}
    71  	}
    72  
    73  	glog.V(1).Info("rpc: getblock (verbosity=1) ", hash)
    74  
    75  	res := btc.ResGetBlockThin{}
    76  	req := btc.CmdGetBlock{Method: "getblock"}
    77  	req.Params.BlockHash = hash
    78  	req.Params.Verbosity = 1
    79  	err = b.Call(&req, &res)
    80  
    81  	if err != nil {
    82  		return nil, errors.Annotatef(err, "hash %v", hash)
    83  	}
    84  	if res.Error != nil {
    85  		return nil, errors.Annotatef(res.Error, "hash %v", hash)
    86  	}
    87  
    88  	txs := make([]bchain.Tx, 0, len(res.Result.Txids))
    89  	for _, txid := range res.Result.Txids {
    90  		tx, err := b.GetTransaction(txid)
    91  		if err != nil {
    92  			if err == bchain.ErrTxNotFound {
    93  				glog.Errorf("rpc: getblock: skipping transaction in block %s due error: %s", hash, err)
    94  				continue
    95  			}
    96  			return nil, err
    97  		}
    98  		txs = append(txs, *tx)
    99  	}
   100  	block := &bchain.Block{
   101  		BlockHeader: res.Result.BlockHeader,
   102  		Txs:         txs,
   103  	}
   104  	return block, nil
   105  }
   106  
   107  // GetTransactionForMempool returns a transaction by the transaction ID
   108  // Litecoin cannot use optimized BitcoinRPC.GetTransactionForMempool since v 0.21.2,
   109  // which introduced MWEB fields to the transaction data and made the serialized transaction incompatible with Bitcoin wire protocol
   110  func (b *LitecoinRPC) GetTransactionForMempool(txid string) (*bchain.Tx, error) {
   111  	return b.GetTransaction(txid)
   112  }