github.com/cryptohub-digital/blockbook-fork@v0.0.0-20230713133354-673c927af7f1/bchain/coins/blockchain.go (about)

     1  package coins
     2  
     3  import (
     4  	"context"
     5  	"encoding/json"
     6  	"fmt"
     7  	"io/ioutil"
     8  	"math/big"
     9  	"reflect"
    10  	"time"
    11  
    12  	"github.com/cryptohub-digital/blockbook-fork/bchain"
    13  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/avalanche"
    14  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/bch"
    15  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/bellcoin"
    16  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/bitcore"
    17  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/bitzeny"
    18  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/bsc"
    19  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/btc"
    20  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/btg"
    21  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/cpuchain"
    22  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/dash"
    23  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/dcr"
    24  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/deeponion"
    25  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/digibyte"
    26  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/divi"
    27  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/dogecoin"
    28  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/ecash"
    29  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/eth"
    30  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/firo"
    31  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/flo"
    32  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/fujicoin"
    33  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/gamecredits"
    34  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/grs"
    35  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/koto"
    36  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/liquid"
    37  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/litecoin"
    38  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/monacoin"
    39  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/monetaryunit"
    40  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/myriad"
    41  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/namecoin"
    42  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/nuls"
    43  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/omotenashicoin"
    44  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/pivx"
    45  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/polis"
    46  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/qtum"
    47  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/ravencoin"
    48  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/ritocoin"
    49  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/snowgem"
    50  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/trezarcoin"
    51  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/unobtanium"
    52  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/vertcoin"
    53  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/viacoin"
    54  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/vipstarcoin"
    55  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/xcb"
    56  	"github.com/cryptohub-digital/blockbook-fork/bchain/coins/zec"
    57  
    58  	"github.com/cryptohub-digital/blockbook-fork/common"
    59  	"github.com/juju/errors"
    60  )
    61  
    62  type blockChainFactory func(config json.RawMessage, pushHandler func(bchain.NotificationType)) (bchain.BlockChain, error)
    63  
    64  // BlockChainFactories is a map of constructors of coin RPC interfaces
    65  var BlockChainFactories = make(map[string]blockChainFactory)
    66  
    67  func init() {
    68  	BlockChainFactories["Bitcoin"] = btc.NewBitcoinRPC
    69  	BlockChainFactories["Testnet"] = btc.NewBitcoinRPC
    70  	BlockChainFactories["Signet"] = btc.NewBitcoinRPC
    71  	BlockChainFactories["Regtest"] = btc.NewBitcoinRPC
    72  	BlockChainFactories["Zcash"] = zec.NewZCashRPC
    73  	BlockChainFactories["Zcash Testnet"] = zec.NewZCashRPC
    74  	BlockChainFactories["Ethereum"] = eth.NewEthereumRPC
    75  	BlockChainFactories["Ethereum Archive"] = eth.NewEthereumRPC
    76  	BlockChainFactories["Ethereum Classic"] = eth.NewEthereumRPC
    77  	BlockChainFactories["Ethereum Testnet Ropsten"] = eth.NewEthereumRPC
    78  	BlockChainFactories["Ethereum Testnet Ropsten Archive"] = eth.NewEthereumRPC
    79  	BlockChainFactories["Ethereum Testnet Goerli"] = eth.NewEthereumRPC
    80  	BlockChainFactories["Ethereum Testnet Goerli Archive"] = eth.NewEthereumRPC
    81  	BlockChainFactories["Ethereum Testnet Sepolia"] = eth.NewEthereumRPC
    82  	BlockChainFactories["Ethereum Testnet Sepolia Archive"] = eth.NewEthereumRPC
    83  	BlockChainFactories["Bcash"] = bch.NewBCashRPC
    84  	BlockChainFactories["Bcash Testnet"] = bch.NewBCashRPC
    85  	BlockChainFactories["Bgold"] = btg.NewBGoldRPC
    86  	BlockChainFactories["Bgold Testnet"] = btg.NewBGoldRPC
    87  	BlockChainFactories["Dash"] = dash.NewDashRPC
    88  	BlockChainFactories["Dash Testnet"] = dash.NewDashRPC
    89  	BlockChainFactories["Decred"] = dcr.NewDecredRPC
    90  	BlockChainFactories["Decred Testnet"] = dcr.NewDecredRPC
    91  	BlockChainFactories["GameCredits"] = gamecredits.NewGameCreditsRPC
    92  	BlockChainFactories["Koto"] = koto.NewKotoRPC
    93  	BlockChainFactories["Koto Testnet"] = koto.NewKotoRPC
    94  	BlockChainFactories["Litecoin"] = litecoin.NewLitecoinRPC
    95  	BlockChainFactories["Litecoin Testnet"] = litecoin.NewLitecoinRPC
    96  	BlockChainFactories["Dogecoin"] = dogecoin.NewDogecoinRPC
    97  	BlockChainFactories["Dogecoin Testnet"] = dogecoin.NewDogecoinRPC
    98  	BlockChainFactories["Vertcoin"] = vertcoin.NewVertcoinRPC
    99  	BlockChainFactories["Vertcoin Testnet"] = vertcoin.NewVertcoinRPC
   100  	BlockChainFactories["Namecoin"] = namecoin.NewNamecoinRPC
   101  	BlockChainFactories["Monacoin"] = monacoin.NewMonacoinRPC
   102  	BlockChainFactories["Monacoin Testnet"] = monacoin.NewMonacoinRPC
   103  	BlockChainFactories["MonetaryUnit"] = monetaryunit.NewMonetaryUnitRPC
   104  	BlockChainFactories["DigiByte"] = digibyte.NewDigiByteRPC
   105  	BlockChainFactories["DigiByte Testnet"] = digibyte.NewDigiByteRPC
   106  	BlockChainFactories["Myriad"] = myriad.NewMyriadRPC
   107  	BlockChainFactories["Liquid"] = liquid.NewLiquidRPC
   108  	BlockChainFactories["Groestlcoin"] = grs.NewGroestlcoinRPC
   109  	BlockChainFactories["Groestlcoin Testnet"] = grs.NewGroestlcoinRPC
   110  	BlockChainFactories["Groestlcoin Signet"] = grs.NewGroestlcoinRPC
   111  	BlockChainFactories["Groestlcoin Regtest"] = grs.NewGroestlcoinRPC
   112  	BlockChainFactories["PIVX"] = pivx.NewPivXRPC
   113  	BlockChainFactories["PIVX Testnet"] = pivx.NewPivXRPC
   114  	BlockChainFactories["Polis"] = polis.NewPolisRPC
   115  	BlockChainFactories["Firo"] = firo.NewFiroRPC
   116  	BlockChainFactories["Fujicoin"] = fujicoin.NewFujicoinRPC
   117  	BlockChainFactories["Flo"] = flo.NewFloRPC
   118  	BlockChainFactories["Bellcoin"] = bellcoin.NewBellcoinRPC
   119  	BlockChainFactories["Qtum"] = qtum.NewQtumRPC
   120  	BlockChainFactories["Viacoin"] = viacoin.NewViacoinRPC
   121  	BlockChainFactories["Qtum Testnet"] = qtum.NewQtumRPC
   122  	BlockChainFactories["NULS"] = nuls.NewNulsRPC
   123  	BlockChainFactories["VIPSTARCOIN"] = vipstarcoin.NewVIPSTARCOINRPC
   124  	BlockChainFactories["Flux"] = zec.NewZCashRPC
   125  	BlockChainFactories["Ravencoin"] = ravencoin.NewRavencoinRPC
   126  	BlockChainFactories["Ritocoin"] = ritocoin.NewRitocoinRPC
   127  	BlockChainFactories["Divi"] = divi.NewDiviRPC
   128  	BlockChainFactories["CPUchain"] = cpuchain.NewCPUchainRPC
   129  	BlockChainFactories["Unobtanium"] = unobtanium.NewUnobtaniumRPC
   130  	BlockChainFactories["DeepOnion"] = deeponion.NewDeepOnionRPC
   131  	BlockChainFactories["SnowGem"] = snowgem.NewSnowGemRPC
   132  	BlockChainFactories["Bitcore"] = bitcore.NewBitcoreRPC
   133  	BlockChainFactories["Omotenashicoin"] = omotenashicoin.NewOmotenashiCoinRPC
   134  	BlockChainFactories["Omotenashicoin Testnet"] = omotenashicoin.NewOmotenashiCoinRPC
   135  	BlockChainFactories["BitZeny"] = bitzeny.NewBitZenyRPC
   136  	BlockChainFactories["Trezarcoin"] = trezarcoin.NewTrezarcoinRPC
   137  	BlockChainFactories["ECash"] = ecash.NewECashRPC
   138  	BlockChainFactories["Avalanche"] = avalanche.NewAvalancheRPC
   139  	BlockChainFactories["Avalanche Archive"] = avalanche.NewAvalancheRPC
   140  	BlockChainFactories["BNB Smart Chain"] = bsc.NewBNBSmartChainRPC
   141  	BlockChainFactories["BNB Smart Chain Archive"] = bsc.NewBNBSmartChainRPC
   142  	BlockChainFactories["Core Coin"] = xcb.NewCoreblockchainRPC
   143  
   144  }
   145  
   146  // GetCoinNameFromConfig gets coin name and coin shortcut from config file
   147  func GetCoinNameFromConfig(configFileContent []byte) (string, string, string, error) {
   148  	var cn struct {
   149  		CoinName     string `json:"coin_name"`
   150  		CoinShortcut string `json:"coin_shortcut"`
   151  		CoinLabel    string `json:"coin_label"`
   152  	}
   153  	err := json.Unmarshal(configFileContent, &cn)
   154  	if err != nil {
   155  		return "", "", "", errors.Annotatef(err, "Error parsing config file ")
   156  	}
   157  	return cn.CoinName, cn.CoinShortcut, cn.CoinLabel, nil
   158  }
   159  
   160  // NewBlockChain creates bchain.BlockChain and bchain.Mempool for the coin passed by the parameter coin
   161  func NewBlockChain(coin string, configfile string, pushHandler func(bchain.NotificationType), metrics *common.Metrics) (bchain.BlockChain, bchain.Mempool, error) {
   162  	data, err := ioutil.ReadFile(configfile)
   163  	if err != nil {
   164  		return nil, nil, errors.Annotatef(err, "Error reading file %v", configfile)
   165  	}
   166  	var config json.RawMessage
   167  	err = json.Unmarshal(data, &config)
   168  	if err != nil {
   169  		return nil, nil, errors.Annotatef(err, "Error parsing file %v", configfile)
   170  	}
   171  	bcf, ok := BlockChainFactories[coin]
   172  	if !ok {
   173  		return nil, nil, errors.New(fmt.Sprint("Unsupported coin '", coin, "'. Must be one of ", reflect.ValueOf(BlockChainFactories).MapKeys()))
   174  	}
   175  	bc, err := bcf(config, pushHandler)
   176  	if err != nil {
   177  		return nil, nil, err
   178  	}
   179  	err = bc.Initialize()
   180  	if err != nil {
   181  		return nil, nil, err
   182  	}
   183  	mempool, err := bc.CreateMempool(bc)
   184  	if err != nil {
   185  		return nil, nil, err
   186  	}
   187  	return &blockChainWithMetrics{b: bc, m: metrics}, &mempoolWithMetrics{mempool: mempool, m: metrics}, nil
   188  }
   189  
   190  type blockChainWithMetrics struct {
   191  	b bchain.BlockChain
   192  	m *common.Metrics
   193  }
   194  
   195  func (c *blockChainWithMetrics) observeRPCLatency(method string, start time.Time, err error) {
   196  	var e string
   197  	if err != nil {
   198  		e = "failure"
   199  	}
   200  	c.m.RPCLatency.With(common.Labels{"method": method, "error": e}).Observe(float64(time.Since(start)) / 1e6) // in milliseconds
   201  }
   202  
   203  func (c *blockChainWithMetrics) Initialize() error {
   204  	return c.b.Initialize()
   205  }
   206  
   207  func (c *blockChainWithMetrics) CreateMempool(chain bchain.BlockChain) (bchain.Mempool, error) {
   208  	return c.b.CreateMempool(chain)
   209  }
   210  
   211  func (c *blockChainWithMetrics) InitializeMempool(addrDescForOutpoint bchain.AddrDescForOutpointFunc, onNewTxAddr bchain.OnNewTxAddrFunc, onNewTx bchain.OnNewTxFunc) error {
   212  	return c.b.InitializeMempool(addrDescForOutpoint, onNewTxAddr, onNewTx)
   213  }
   214  
   215  func (c *blockChainWithMetrics) Shutdown(ctx context.Context) error {
   216  	return c.b.Shutdown(ctx)
   217  }
   218  
   219  func (c *blockChainWithMetrics) IsTestnet() bool {
   220  	return c.b.IsTestnet()
   221  }
   222  
   223  func (c *blockChainWithMetrics) GetNetworkName() string {
   224  	return c.b.GetNetworkName()
   225  }
   226  
   227  func (c *blockChainWithMetrics) GetCoinName() string {
   228  	return c.b.GetCoinName()
   229  }
   230  
   231  func (c *blockChainWithMetrics) GetSubversion() string {
   232  	return c.b.GetSubversion()
   233  }
   234  
   235  func (c *blockChainWithMetrics) GetChainInfo() (v *bchain.ChainInfo, err error) {
   236  	defer func(s time.Time) { c.observeRPCLatency("GetChainInfo", s, err) }(time.Now())
   237  	return c.b.GetChainInfo()
   238  }
   239  
   240  func (c *blockChainWithMetrics) GetBestBlockHash() (v string, err error) {
   241  	defer func(s time.Time) { c.observeRPCLatency("GetBestBlockHash", s, err) }(time.Now())
   242  	return c.b.GetBestBlockHash()
   243  }
   244  
   245  func (c *blockChainWithMetrics) GetBestBlockHeight() (v uint32, err error) {
   246  	defer func(s time.Time) { c.observeRPCLatency("GetBestBlockHeight", s, err) }(time.Now())
   247  	return c.b.GetBestBlockHeight()
   248  }
   249  
   250  func (c *blockChainWithMetrics) GetBlockHash(height uint32) (v string, err error) {
   251  	defer func(s time.Time) { c.observeRPCLatency("GetBlockHash", s, err) }(time.Now())
   252  	return c.b.GetBlockHash(height)
   253  }
   254  
   255  func (c *blockChainWithMetrics) GetBlockHeader(hash string) (v *bchain.BlockHeader, err error) {
   256  	defer func(s time.Time) { c.observeRPCLatency("GetBlockHeader", s, err) }(time.Now())
   257  	return c.b.GetBlockHeader(hash)
   258  }
   259  
   260  func (c *blockChainWithMetrics) GetBlock(hash string, height uint32) (v *bchain.Block, err error) {
   261  	defer func(s time.Time) { c.observeRPCLatency("GetBlock", s, err) }(time.Now())
   262  	return c.b.GetBlock(hash, height)
   263  }
   264  
   265  func (c *blockChainWithMetrics) GetBlockInfo(hash string) (v *bchain.BlockInfo, err error) {
   266  	defer func(s time.Time) { c.observeRPCLatency("GetBlockInfo", s, err) }(time.Now())
   267  	return c.b.GetBlockInfo(hash)
   268  }
   269  
   270  func (c *blockChainWithMetrics) GetBlockRaw(hash string) (v string, err error) {
   271  	defer func(s time.Time) { c.observeRPCLatency("GetBlockRaw", s, err) }(time.Now())
   272  	return c.b.GetBlockRaw(hash)
   273  }
   274  
   275  func (c *blockChainWithMetrics) GetMempoolTransactions() (v []string, err error) {
   276  	defer func(s time.Time) { c.observeRPCLatency("GetMempoolTransactions", s, err) }(time.Now())
   277  	return c.b.GetMempoolTransactions()
   278  }
   279  
   280  func (c *blockChainWithMetrics) GetTransaction(txid string) (v *bchain.Tx, err error) {
   281  	defer func(s time.Time) { c.observeRPCLatency("GetTransaction", s, err) }(time.Now())
   282  	return c.b.GetTransaction(txid)
   283  }
   284  
   285  func (c *blockChainWithMetrics) GetTransactionSpecific(tx *bchain.Tx) (v json.RawMessage, err error) {
   286  	defer func(s time.Time) { c.observeRPCLatency("GetTransactionSpecific", s, err) }(time.Now())
   287  	return c.b.GetTransactionSpecific(tx)
   288  }
   289  
   290  func (c *blockChainWithMetrics) GetTransactionForMempool(txid string) (v *bchain.Tx, err error) {
   291  	defer func(s time.Time) { c.observeRPCLatency("GetTransactionForMempool", s, err) }(time.Now())
   292  	return c.b.GetTransactionForMempool(txid)
   293  }
   294  
   295  func (c *blockChainWithMetrics) EstimateSmartFee(blocks int, conservative bool) (v big.Int, err error) {
   296  	defer func(s time.Time) { c.observeRPCLatency("EstimateSmartFee", s, err) }(time.Now())
   297  	return c.b.EstimateSmartFee(blocks, conservative)
   298  }
   299  
   300  func (c *blockChainWithMetrics) EstimateFee(blocks int) (v big.Int, err error) {
   301  	defer func(s time.Time) { c.observeRPCLatency("EstimateFee", s, err) }(time.Now())
   302  	return c.b.EstimateFee(blocks)
   303  }
   304  
   305  func (c *blockChainWithMetrics) SendRawTransaction(tx string) (v string, err error) {
   306  	defer func(s time.Time) { c.observeRPCLatency("SendRawTransaction", s, err) }(time.Now())
   307  	return c.b.SendRawTransaction(tx)
   308  }
   309  
   310  func (c *blockChainWithMetrics) GetMempoolEntry(txid string) (v *bchain.MempoolEntry, err error) {
   311  	defer func(s time.Time) { c.observeRPCLatency("GetMempoolEntry", s, err) }(time.Now())
   312  	return c.b.GetMempoolEntry(txid)
   313  }
   314  
   315  func (c *blockChainWithMetrics) GetChainParser() bchain.BlockChainParser {
   316  	return c.b.GetChainParser()
   317  }
   318  
   319  func (c *blockChainWithMetrics) EthereumTypeGetBalance(addrDesc bchain.AddressDescriptor) (v *big.Int, err error) {
   320  	defer func(s time.Time) { c.observeRPCLatency("EthereumTypeGetBalance", s, err) }(time.Now())
   321  	return c.b.EthereumTypeGetBalance(addrDesc)
   322  }
   323  
   324  func (c *blockChainWithMetrics) EthereumTypeGetNonce(addrDesc bchain.AddressDescriptor) (v uint64, err error) {
   325  	defer func(s time.Time) { c.observeRPCLatency("EthereumTypeGetNonce", s, err) }(time.Now())
   326  	return c.b.EthereumTypeGetNonce(addrDesc)
   327  }
   328  
   329  func (c *blockChainWithMetrics) EthereumTypeEstimateGas(params map[string]interface{}) (v uint64, err error) {
   330  	defer func(s time.Time) { c.observeRPCLatency("EthereumTypeEstimateGas", s, err) }(time.Now())
   331  	return c.b.EthereumTypeEstimateGas(params)
   332  }
   333  
   334  func (c *blockChainWithMetrics) GetContractInfo(contractDesc bchain.AddressDescriptor) (v *bchain.ContractInfo, err error) {
   335  	defer func(s time.Time) { c.observeRPCLatency("GetContractInfo", s, err) }(time.Now())
   336  	return c.b.GetContractInfo(contractDesc)
   337  }
   338  
   339  func (c *blockChainWithMetrics) EthereumTypeGetErc20ContractBalance(addrDesc, contractDesc bchain.AddressDescriptor) (v *big.Int, err error) {
   340  	defer func(s time.Time) { c.observeRPCLatency("EthereumTypeGetErc20ContractBalance", s, err) }(time.Now())
   341  	return c.b.EthereumTypeGetErc20ContractBalance(addrDesc, contractDesc)
   342  }
   343  
   344  // GetTokenURI returns URI of non fungible or multi token defined by token id
   345  func (c *blockChainWithMetrics) GetTokenURI(contractDesc bchain.AddressDescriptor, tokenID *big.Int) (v string, err error) {
   346  	defer func(s time.Time) { c.observeRPCLatency("GetTokenURI", s, err) }(time.Now())
   347  	return c.b.GetTokenURI(contractDesc, tokenID)
   348  }
   349  
   350  func (c *blockChainWithMetrics) CoreCoinTypeGetBalance(addrDesc bchain.AddressDescriptor) (v *big.Int, err error) {
   351  	defer func(s time.Time) { c.observeRPCLatency("CoreCoinTypeGetBalance", s, err) }(time.Now())
   352  	return c.b.CoreCoinTypeGetBalance(addrDesc)
   353  }
   354  
   355  func (c *blockChainWithMetrics) CoreCoinTypeGetNonce(addrDesc bchain.AddressDescriptor) (v uint64, err error) {
   356  	defer func(s time.Time) { c.observeRPCLatency("CoreCoinTypeGetNonce", s, err) }(time.Now())
   357  	return c.b.CoreCoinTypeGetNonce(addrDesc)
   358  }
   359  
   360  func (c *blockChainWithMetrics) CoreCoinTypeEstimateEnergy(params map[string]interface{}) (v uint64, err error) {
   361  	defer func(s time.Time) { c.observeRPCLatency("CoreCoinTypeEstimateEnergy", s, err) }(time.Now())
   362  	return c.b.CoreCoinTypeEstimateEnergy(params)
   363  }
   364  
   365  func (c *blockChainWithMetrics) CoreCoinTypeGetCrc20ContractBalance(addrDesc, contractDesc bchain.AddressDescriptor) (v *big.Int, err error) {
   366  	defer func(s time.Time) { c.observeRPCLatency("CoreCoinTypeGetCrc20ContractBalance", s, err) }(time.Now())
   367  	return c.b.CoreCoinTypeGetCrc20ContractBalance(addrDesc, contractDesc)
   368  }
   369  
   370  type mempoolWithMetrics struct {
   371  	mempool bchain.Mempool
   372  	m       *common.Metrics
   373  }
   374  
   375  func (c *mempoolWithMetrics) observeRPCLatency(method string, start time.Time, err error) {
   376  	var e string
   377  	if err != nil {
   378  		e = "failure"
   379  	}
   380  	c.m.RPCLatency.With(common.Labels{"method": method, "error": e}).Observe(float64(time.Since(start)) / 1e6) // in milliseconds
   381  }
   382  
   383  func (c *mempoolWithMetrics) Resync() (count int, err error) {
   384  	defer func(s time.Time) { c.observeRPCLatency("ResyncMempool", s, err) }(time.Now())
   385  	count, err = c.mempool.Resync()
   386  	if err == nil {
   387  		c.m.MempoolSize.Set(float64(count))
   388  	}
   389  	return count, err
   390  }
   391  
   392  func (c *mempoolWithMetrics) GetTransactions(address string) (v []bchain.Outpoint, err error) {
   393  	defer func(s time.Time) { c.observeRPCLatency("GetMempoolTransactions", s, err) }(time.Now())
   394  	return c.mempool.GetTransactions(address)
   395  }
   396  
   397  func (c *mempoolWithMetrics) GetAddrDescTransactions(addrDesc bchain.AddressDescriptor) (v []bchain.Outpoint, err error) {
   398  	defer func(s time.Time) { c.observeRPCLatency("GetMempoolTransactionsForAddrDesc", s, err) }(time.Now())
   399  	return c.mempool.GetAddrDescTransactions(addrDesc)
   400  }
   401  
   402  func (c *mempoolWithMetrics) GetAllEntries() (v bchain.MempoolTxidEntries) {
   403  	defer func(s time.Time) { c.observeRPCLatency("GetAllEntries", s, nil) }(time.Now())
   404  	return c.mempool.GetAllEntries()
   405  }
   406  
   407  func (c *mempoolWithMetrics) GetTransactionTime(txid string) uint32 {
   408  	return c.mempool.GetTransactionTime(txid)
   409  }
   410  
   411  func (c *mempoolWithMetrics) GetTxidFilterEntries(filterScripts string, fromTimestamp uint32) (bchain.MempoolTxidFilterEntries, error) {
   412  	return c.mempool.GetTxidFilterEntries(filterScripts, fromTimestamp)
   413  }