4344 lines
138 KiB
Go
4344 lines
138 KiB
Go
// Copyright (c) 2013-2017 The btcsuite developers
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// Copyright (c) 2015-2017 The Decred developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"bytes"
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"crypto/sha256"
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"crypto/subtle"
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"encoding/base64"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"math/big"
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"math/rand"
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"net"
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"net/http"
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"os"
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/btcsuite/btcd/blockchain"
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"github.com/btcsuite/btcd/blockchain/indexers"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/btcjson"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/database"
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"github.com/btcsuite/btcd/mempool"
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"github.com/btcsuite/btcd/mining"
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"github.com/btcsuite/btcd/mining/cpuminer"
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"github.com/btcsuite/btcd/peer"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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"github.com/btcsuite/websocket"
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)
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// API version constants
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const (
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jsonrpcSemverString = "1.3.0"
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jsonrpcSemverMajor = 1
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jsonrpcSemverMinor = 3
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jsonrpcSemverPatch = 0
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)
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const (
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// rpcAuthTimeoutSeconds is the number of seconds a connection to the
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// RPC server is allowed to stay open without authenticating before it
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// is closed.
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rpcAuthTimeoutSeconds = 10
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// uint256Size is the number of bytes needed to represent an unsigned
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// 256-bit integer.
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uint256Size = 32
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// gbtNonceRange is two 32-bit big-endian hexadecimal integers which
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// represent the valid ranges of nonces returned by the getblocktemplate
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// RPC.
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gbtNonceRange = "00000000ffffffff"
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// gbtRegenerateSeconds is the number of seconds that must pass before
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// a new template is generated when the previous block hash has not
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// changed and there have been changes to the available transactions
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// in the memory pool.
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gbtRegenerateSeconds = 60
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// maxProtocolVersion is the max protocol version the server supports.
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maxProtocolVersion = 70002
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)
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var (
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// gbtMutableFields are the manipulations the server allows to be made
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// to block templates generated by the getblocktemplate RPC. It is
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// declared here to avoid the overhead of creating the slice on every
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// invocation for constant data.
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gbtMutableFields = []string{
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"time", "transactions/add", "prevblock", "coinbase/append",
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}
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// gbtCoinbaseAux describes additional data that miners should include
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// in the coinbase signature script. It is declared here to avoid the
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// overhead of creating a new object on every invocation for constant
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// data.
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gbtCoinbaseAux = &btcjson.GetBlockTemplateResultAux{
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Flags: hex.EncodeToString(builderScript(txscript.
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NewScriptBuilder().
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AddData([]byte(mining.CoinbaseFlags)))),
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}
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// gbtCapabilities describes additional capabilities returned with a
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// block template generated by the getblocktemplate RPC. It is
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// declared here to avoid the overhead of creating the slice on every
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// invocation for constant data.
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gbtCapabilities = []string{"proposal"}
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)
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// Errors
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var (
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// ErrRPCUnimplemented is an error returned to RPC clients when the
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// provided command is recognized, but not implemented.
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ErrRPCUnimplemented = &btcjson.RPCError{
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Code: btcjson.ErrRPCUnimplemented,
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Message: "Command unimplemented",
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}
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// ErrRPCNoWallet is an error returned to RPC clients when the provided
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// command is recognized as a wallet command.
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ErrRPCNoWallet = &btcjson.RPCError{
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Code: btcjson.ErrRPCNoWallet,
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Message: "This implementation does not implement wallet commands",
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}
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)
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type commandHandler func(*rpcServer, interface{}, <-chan struct{}) (interface{}, error)
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// rpcHandlers maps RPC command strings to appropriate handler functions.
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// This is set by init because help references rpcHandlers and thus causes
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// a dependency loop.
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var rpcHandlers map[string]commandHandler
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var rpcHandlersBeforeInit = map[string]commandHandler{
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"addnode": handleAddNode,
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"createrawtransaction": handleCreateRawTransaction,
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"debuglevel": handleDebugLevel,
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"decoderawtransaction": handleDecodeRawTransaction,
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"decodescript": handleDecodeScript,
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"estimatefee": handleEstimateFee,
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"generate": handleGenerate,
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"getaddednodeinfo": handleGetAddedNodeInfo,
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"getbestblock": handleGetBestBlock,
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"getbestblockhash": handleGetBestBlockHash,
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"getblock": handleGetBlock,
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"getblockchaininfo": handleGetBlockChainInfo,
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"getblockcount": handleGetBlockCount,
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"getblockhash": handleGetBlockHash,
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"getblockheader": handleGetBlockHeader,
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"getblocktemplate": handleGetBlockTemplate,
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"getcfilter": handleGetCFilter,
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"getcfilterheader": handleGetCFilterHeader,
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"getconnectioncount": handleGetConnectionCount,
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"getcurrentnet": handleGetCurrentNet,
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"getdifficulty": handleGetDifficulty,
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"getgenerate": handleGetGenerate,
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"gethashespersec": handleGetHashesPerSec,
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"getheaders": handleGetHeaders,
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"getinfo": handleGetInfo,
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"getmempoolinfo": handleGetMempoolInfo,
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"getmininginfo": handleGetMiningInfo,
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"getnettotals": handleGetNetTotals,
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"getnetworkhashps": handleGetNetworkHashPS,
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"getpeerinfo": handleGetPeerInfo,
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"getrawmempool": handleGetRawMempool,
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"getrawtransaction": handleGetRawTransaction,
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"gettxout": handleGetTxOut,
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"help": handleHelp,
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"node": handleNode,
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"ping": handlePing,
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"searchrawtransactions": handleSearchRawTransactions,
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"sendrawtransaction": handleSendRawTransaction,
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"setgenerate": handleSetGenerate,
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"stop": handleStop,
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"submitblock": handleSubmitBlock,
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"uptime": handleUptime,
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"validateaddress": handleValidateAddress,
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"verifychain": handleVerifyChain,
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"verifymessage": handleVerifyMessage,
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"version": handleVersion,
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}
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// list of commands that we recognize, but for which btcd has no support because
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// it lacks support for wallet functionality. For these commands the user
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// should ask a connected instance of btcwallet.
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var rpcAskWallet = map[string]struct{}{
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"addmultisigaddress": {},
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"backupwallet": {},
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"createencryptedwallet": {},
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"createmultisig": {},
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"dumpprivkey": {},
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"dumpwallet": {},
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"encryptwallet": {},
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"getaccount": {},
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"getaccountaddress": {},
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"getaddressesbyaccount": {},
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"getbalance": {},
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"getnewaddress": {},
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"getrawchangeaddress": {},
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"getreceivedbyaccount": {},
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"getreceivedbyaddress": {},
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"gettransaction": {},
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"gettxoutsetinfo": {},
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"getunconfirmedbalance": {},
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"getwalletinfo": {},
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"importprivkey": {},
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"importwallet": {},
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"keypoolrefill": {},
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"listaccounts": {},
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"listaddressgroupings": {},
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"listlockunspent": {},
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"listreceivedbyaccount": {},
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"listreceivedbyaddress": {},
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"listsinceblock": {},
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"listtransactions": {},
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"listunspent": {},
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"lockunspent": {},
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"move": {},
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"sendfrom": {},
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"sendmany": {},
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"sendtoaddress": {},
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"setaccount": {},
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"settxfee": {},
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"signmessage": {},
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"signrawtransaction": {},
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"walletlock": {},
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"walletpassphrase": {},
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"walletpassphrasechange": {},
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}
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// Commands that are currently unimplemented, but should ultimately be.
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var rpcUnimplemented = map[string]struct{}{
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"estimatepriority": {},
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"getchaintips": {},
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"getmempoolentry": {},
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"getnetworkinfo": {},
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"getwork": {},
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"invalidateblock": {},
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"preciousblock": {},
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"reconsiderblock": {},
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}
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// Commands that are available to a limited user
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var rpcLimited = map[string]struct{}{
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// Websockets commands
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"loadtxfilter": {},
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"notifyblocks": {},
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"notifynewtransactions": {},
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"notifyreceived": {},
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"notifyspent": {},
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"rescan": {},
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"rescanblocks": {},
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"session": {},
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// Websockets AND HTTP/S commands
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"help": {},
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// HTTP/S-only commands
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"createrawtransaction": {},
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"decoderawtransaction": {},
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"decodescript": {},
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"estimatefee": {},
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"getbestblock": {},
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"getbestblockhash": {},
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"getblock": {},
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"getblockcount": {},
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"getblockhash": {},
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"getblockheader": {},
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"getcfilter": {},
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"getcfilterheader": {},
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"getcurrentnet": {},
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"getdifficulty": {},
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"getheaders": {},
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"getinfo": {},
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"getnettotals": {},
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"getnetworkhashps": {},
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"getrawmempool": {},
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"getrawtransaction": {},
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"gettxout": {},
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"searchrawtransactions": {},
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"sendrawtransaction": {},
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"submitblock": {},
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"uptime": {},
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"validateaddress": {},
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"verifymessage": {},
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"version": {},
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}
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// builderScript is a convenience function which is used for hard-coded scripts
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// built with the script builder. Any errors are converted to a panic since it
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// is only, and must only, be used with hard-coded, and therefore, known good,
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// scripts.
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func builderScript(builder *txscript.ScriptBuilder) []byte {
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script, err := builder.Script()
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if err != nil {
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panic(err)
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}
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return script
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}
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// internalRPCError is a convenience function to convert an internal error to
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// an RPC error with the appropriate code set. It also logs the error to the
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// RPC server subsystem since internal errors really should not occur. The
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// context parameter is only used in the log message and may be empty if it's
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// not needed.
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func internalRPCError(errStr, context string) *btcjson.RPCError {
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logStr := errStr
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if context != "" {
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logStr = context + ": " + errStr
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}
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rpcsLog.Error(logStr)
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return btcjson.NewRPCError(btcjson.ErrRPCInternal.Code, errStr)
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}
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// rpcDecodeHexError is a convenience function for returning a nicely formatted
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// RPC error which indicates the provided hex string failed to decode.
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func rpcDecodeHexError(gotHex string) *btcjson.RPCError {
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return btcjson.NewRPCError(btcjson.ErrRPCDecodeHexString,
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fmt.Sprintf("Argument must be hexadecimal string (not %q)",
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gotHex))
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}
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// rpcNoTxInfoError is a convenience function for returning a nicely formatted
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// RPC error which indicates there is no information available for the provided
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// transaction hash.
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func rpcNoTxInfoError(txHash *chainhash.Hash) *btcjson.RPCError {
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return btcjson.NewRPCError(btcjson.ErrRPCNoTxInfo,
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fmt.Sprintf("No information available about transaction %v",
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txHash))
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}
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// gbtWorkState houses state that is used in between multiple RPC invocations to
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// getblocktemplate.
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type gbtWorkState struct {
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sync.Mutex
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lastTxUpdate time.Time
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lastGenerated time.Time
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prevHash *chainhash.Hash
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minTimestamp time.Time
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template *mining.BlockTemplate
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notifyMap map[chainhash.Hash]map[int64]chan struct{}
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timeSource blockchain.MedianTimeSource
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}
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// newGbtWorkState returns a new instance of a gbtWorkState with all internal
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// fields initialized and ready to use.
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func newGbtWorkState(timeSource blockchain.MedianTimeSource) *gbtWorkState {
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return &gbtWorkState{
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notifyMap: make(map[chainhash.Hash]map[int64]chan struct{}),
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timeSource: timeSource,
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}
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}
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// handleUnimplemented is the handler for commands that should ultimately be
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// supported but are not yet implemented.
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func handleUnimplemented(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
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return nil, ErrRPCUnimplemented
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}
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// handleAskWallet is the handler for commands that are recognized as valid, but
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// are unable to answer correctly since it involves wallet state.
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// These commands will be implemented in btcwallet.
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func handleAskWallet(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
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return nil, ErrRPCNoWallet
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}
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// handleAddNode handles addnode commands.
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func handleAddNode(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
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c := cmd.(*btcjson.AddNodeCmd)
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addr := normalizeAddress(c.Addr, s.cfg.ChainParams.DefaultPort)
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var err error
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switch c.SubCmd {
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case "add":
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err = s.cfg.ConnMgr.Connect(addr, true)
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case "remove":
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err = s.cfg.ConnMgr.RemoveByAddr(addr)
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case "onetry":
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err = s.cfg.ConnMgr.Connect(addr, false)
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default:
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: "invalid subcommand for addnode",
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}
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}
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if err != nil {
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: err.Error(),
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}
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}
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// no data returned unless an error.
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return nil, nil
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}
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// handleNode handles node commands.
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func handleNode(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
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c := cmd.(*btcjson.NodeCmd)
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var addr string
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var nodeID uint64
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var errN, err error
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params := s.cfg.ChainParams
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switch c.SubCmd {
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case "disconnect":
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// If we have a valid uint disconnect by node id. Otherwise,
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// attempt to disconnect by address, returning an error if a
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// valid IP address is not supplied.
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if nodeID, errN = strconv.ParseUint(c.Target, 10, 32); errN == nil {
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err = s.cfg.ConnMgr.DisconnectByID(int32(nodeID))
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} else {
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if _, _, errP := net.SplitHostPort(c.Target); errP == nil || net.ParseIP(c.Target) != nil {
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addr = normalizeAddress(c.Target, params.DefaultPort)
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err = s.cfg.ConnMgr.DisconnectByAddr(addr)
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} else {
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: "invalid address or node ID",
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}
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}
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}
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if err != nil && peerExists(s.cfg.ConnMgr, addr, int32(nodeID)) {
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCMisc,
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Message: "can't disconnect a permanent peer, use remove",
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}
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}
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case "remove":
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// If we have a valid uint disconnect by node id. Otherwise,
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// attempt to disconnect by address, returning an error if a
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// valid IP address is not supplied.
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if nodeID, errN = strconv.ParseUint(c.Target, 10, 32); errN == nil {
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err = s.cfg.ConnMgr.RemoveByID(int32(nodeID))
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} else {
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if _, _, errP := net.SplitHostPort(c.Target); errP == nil || net.ParseIP(c.Target) != nil {
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addr = normalizeAddress(c.Target, params.DefaultPort)
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err = s.cfg.ConnMgr.RemoveByAddr(addr)
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} else {
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: "invalid address or node ID",
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}
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}
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}
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if err != nil && peerExists(s.cfg.ConnMgr, addr, int32(nodeID)) {
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCMisc,
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Message: "can't remove a temporary peer, use disconnect",
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}
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}
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case "connect":
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addr = normalizeAddress(c.Target, params.DefaultPort)
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// Default to temporary connections.
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subCmd := "temp"
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if c.ConnectSubCmd != nil {
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subCmd = *c.ConnectSubCmd
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}
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switch subCmd {
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case "perm", "temp":
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err = s.cfg.ConnMgr.Connect(addr, subCmd == "perm")
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default:
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: "invalid subcommand for node connect",
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}
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}
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default:
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: "invalid subcommand for node",
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}
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}
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if err != nil {
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return nil, &btcjson.RPCError{
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Code: btcjson.ErrRPCInvalidParameter,
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Message: err.Error(),
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}
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}
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// no data returned unless an error.
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return nil, nil
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}
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// peerExists determines if a certain peer is currently connected given
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// information about all currently connected peers. Peer existence is
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// determined using either a target address or node id.
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func peerExists(connMgr rpcserverConnManager, addr string, nodeID int32) bool {
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for _, p := range connMgr.ConnectedPeers() {
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if p.ToPeer().ID() == nodeID || p.ToPeer().Addr() == addr {
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return true
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}
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}
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return false
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}
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|
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// messageToHex serializes a message to the wire protocol encoding using the
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// latest protocol version and returns a hex-encoded string of the result.
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func messageToHex(msg wire.Message) (string, error) {
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var buf bytes.Buffer
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if err := msg.BtcEncode(&buf, maxProtocolVersion, wire.WitnessEncoding); err != nil {
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context := fmt.Sprintf("Failed to encode msg of type %T", msg)
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return "", internalRPCError(err.Error(), context)
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}
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return hex.EncodeToString(buf.Bytes()), nil
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}
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|
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// handleCreateRawTransaction handles createrawtransaction commands.
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func handleCreateRawTransaction(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
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c := cmd.(*btcjson.CreateRawTransactionCmd)
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|
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// Validate the locktime, if given.
|
|
if c.LockTime != nil &&
|
|
(*c.LockTime < 0 || *c.LockTime > int64(wire.MaxTxInSequenceNum)) {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidParameter,
|
|
Message: "Locktime out of range",
|
|
}
|
|
}
|
|
|
|
// Add all transaction inputs to a new transaction after performing
|
|
// some validity checks.
|
|
mtx := wire.NewMsgTx(wire.TxVersion)
|
|
for _, input := range c.Inputs {
|
|
txHash, err := chainhash.NewHashFromStr(input.Txid)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(input.Txid)
|
|
}
|
|
|
|
prevOut := wire.NewOutPoint(txHash, input.Vout)
|
|
txIn := wire.NewTxIn(prevOut, []byte{}, nil)
|
|
if c.LockTime != nil && *c.LockTime != 0 {
|
|
txIn.Sequence = wire.MaxTxInSequenceNum - 1
|
|
}
|
|
mtx.AddTxIn(txIn)
|
|
}
|
|
|
|
// Add all transaction outputs to the transaction after performing
|
|
// some validity checks.
|
|
params := s.cfg.ChainParams
|
|
for encodedAddr, amount := range c.Amounts {
|
|
// Ensure amount is in the valid range for monetary amounts.
|
|
if amount <= 0 || amount > btcutil.MaxSatoshi {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCType,
|
|
Message: "Invalid amount",
|
|
}
|
|
}
|
|
|
|
// Decode the provided address.
|
|
addr, err := btcutil.DecodeAddress(encodedAddr, params)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidAddressOrKey,
|
|
Message: "Invalid address or key: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Ensure the address is one of the supported types and that
|
|
// the network encoded with the address matches the network the
|
|
// server is currently on.
|
|
switch addr.(type) {
|
|
case *btcutil.AddressPubKeyHash:
|
|
case *btcutil.AddressScriptHash:
|
|
default:
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidAddressOrKey,
|
|
Message: "Invalid address or key",
|
|
}
|
|
}
|
|
if !addr.IsForNet(params) {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidAddressOrKey,
|
|
Message: "Invalid address: " + encodedAddr +
|
|
" is for the wrong network",
|
|
}
|
|
}
|
|
|
|
// Create a new script which pays to the provided address.
|
|
pkScript, err := txscript.PayToAddrScript(addr)
|
|
if err != nil {
|
|
context := "Failed to generate pay-to-address script"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Convert the amount to satoshi.
|
|
satoshi, err := btcutil.NewAmount(amount)
|
|
if err != nil {
|
|
context := "Failed to convert amount"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
txOut := wire.NewTxOut(int64(satoshi), pkScript)
|
|
mtx.AddTxOut(txOut)
|
|
}
|
|
|
|
// Set the Locktime, if given.
|
|
if c.LockTime != nil {
|
|
mtx.LockTime = uint32(*c.LockTime)
|
|
}
|
|
|
|
// Return the serialized and hex-encoded transaction. Note that this
|
|
// is intentionally not directly returning because the first return
|
|
// value is a string and it would result in returning an empty string to
|
|
// the client instead of nothing (nil) in the case of an error.
|
|
mtxHex, err := messageToHex(mtx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return mtxHex, nil
|
|
}
|
|
|
|
// handleDebugLevel handles debuglevel commands.
|
|
func handleDebugLevel(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.DebugLevelCmd)
|
|
|
|
// Special show command to list supported subsystems.
|
|
if c.LevelSpec == "show" {
|
|
return fmt.Sprintf("Supported subsystems %v",
|
|
supportedSubsystems()), nil
|
|
}
|
|
|
|
err := parseAndSetDebugLevels(c.LevelSpec)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidParams.Code,
|
|
Message: err.Error(),
|
|
}
|
|
}
|
|
|
|
return "Done.", nil
|
|
}
|
|
|
|
// witnessToHex formats the passed witness stack as a slice of hex-encoded
|
|
// strings to be used in a JSON response.
|
|
func witnessToHex(witness wire.TxWitness) []string {
|
|
// Ensure nil is returned when there are no entries versus an empty
|
|
// slice so it can properly be omitted as necessary.
|
|
if len(witness) == 0 {
|
|
return nil
|
|
}
|
|
|
|
result := make([]string, 0, len(witness))
|
|
for _, wit := range witness {
|
|
result = append(result, hex.EncodeToString(wit))
|
|
}
|
|
|
|
return result
|
|
}
|
|
|
|
// createVinList returns a slice of JSON objects for the inputs of the passed
|
|
// transaction.
|
|
func createVinList(mtx *wire.MsgTx) []btcjson.Vin {
|
|
// Coinbase transactions only have a single txin by definition.
|
|
vinList := make([]btcjson.Vin, len(mtx.TxIn))
|
|
if blockchain.IsCoinBaseTx(mtx) {
|
|
txIn := mtx.TxIn[0]
|
|
vinList[0].Coinbase = hex.EncodeToString(txIn.SignatureScript)
|
|
vinList[0].Sequence = txIn.Sequence
|
|
vinList[0].Witness = witnessToHex(txIn.Witness)
|
|
return vinList
|
|
}
|
|
|
|
for i, txIn := range mtx.TxIn {
|
|
// The disassembled string will contain [error] inline
|
|
// if the script doesn't fully parse, so ignore the
|
|
// error here.
|
|
disbuf, _ := txscript.DisasmString(txIn.SignatureScript)
|
|
|
|
vinEntry := &vinList[i]
|
|
vinEntry.Txid = txIn.PreviousOutPoint.Hash.String()
|
|
vinEntry.Vout = txIn.PreviousOutPoint.Index
|
|
vinEntry.Sequence = txIn.Sequence
|
|
vinEntry.ScriptSig = &btcjson.ScriptSig{
|
|
Asm: disbuf,
|
|
Hex: hex.EncodeToString(txIn.SignatureScript),
|
|
}
|
|
|
|
if mtx.HasWitness() {
|
|
vinEntry.Witness = witnessToHex(txIn.Witness)
|
|
}
|
|
}
|
|
|
|
return vinList
|
|
}
|
|
|
|
// createVoutList returns a slice of JSON objects for the outputs of the passed
|
|
// transaction.
|
|
func createVoutList(mtx *wire.MsgTx, chainParams *chaincfg.Params, filterAddrMap map[string]struct{}) []btcjson.Vout {
|
|
voutList := make([]btcjson.Vout, 0, len(mtx.TxOut))
|
|
for i, v := range mtx.TxOut {
|
|
// The disassembled string will contain [error] inline if the
|
|
// script doesn't fully parse, so ignore the error here.
|
|
disbuf, _ := txscript.DisasmString(v.PkScript)
|
|
|
|
// Ignore the error here since an error means the script
|
|
// couldn't parse and there is no additional information about
|
|
// it anyways.
|
|
scriptClass, addrs, reqSigs, _ := txscript.ExtractPkScriptAddrs(
|
|
v.PkScript, chainParams)
|
|
|
|
// Encode the addresses while checking if the address passes the
|
|
// filter when needed.
|
|
passesFilter := len(filterAddrMap) == 0
|
|
encodedAddrs := make([]string, len(addrs))
|
|
for j, addr := range addrs {
|
|
encodedAddr := addr.EncodeAddress()
|
|
encodedAddrs[j] = encodedAddr
|
|
|
|
// No need to check the map again if the filter already
|
|
// passes.
|
|
if passesFilter {
|
|
continue
|
|
}
|
|
if _, exists := filterAddrMap[encodedAddr]; exists {
|
|
passesFilter = true
|
|
}
|
|
}
|
|
|
|
if !passesFilter {
|
|
continue
|
|
}
|
|
|
|
var vout btcjson.Vout
|
|
vout.N = uint32(i)
|
|
vout.Value = btcutil.Amount(v.Value).ToBTC()
|
|
vout.ScriptPubKey.Addresses = encodedAddrs
|
|
vout.ScriptPubKey.Asm = disbuf
|
|
vout.ScriptPubKey.Hex = hex.EncodeToString(v.PkScript)
|
|
vout.ScriptPubKey.Type = scriptClass.String()
|
|
vout.ScriptPubKey.ReqSigs = int32(reqSigs)
|
|
|
|
voutList = append(voutList, vout)
|
|
}
|
|
|
|
return voutList
|
|
}
|
|
|
|
// createTxRawResult converts the passed transaction and associated parameters
|
|
// to a raw transaction JSON object.
|
|
func createTxRawResult(chainParams *chaincfg.Params, mtx *wire.MsgTx,
|
|
txHash string, blkHeader *wire.BlockHeader, blkHash string,
|
|
blkHeight int32, chainHeight int32) (*btcjson.TxRawResult, error) {
|
|
|
|
mtxHex, err := messageToHex(mtx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
txReply := &btcjson.TxRawResult{
|
|
Hex: mtxHex,
|
|
Txid: txHash,
|
|
Hash: mtx.WitnessHash().String(),
|
|
Size: int32(mtx.SerializeSize()),
|
|
Vsize: int32(mempool.GetTxVirtualSize(btcutil.NewTx(mtx))),
|
|
Vin: createVinList(mtx),
|
|
Vout: createVoutList(mtx, chainParams, nil),
|
|
Version: mtx.Version,
|
|
LockTime: mtx.LockTime,
|
|
}
|
|
|
|
if blkHeader != nil {
|
|
// This is not a typo, they are identical in bitcoind as well.
|
|
txReply.Time = blkHeader.Timestamp.Unix()
|
|
txReply.Blocktime = blkHeader.Timestamp.Unix()
|
|
txReply.BlockHash = blkHash
|
|
txReply.Confirmations = uint64(1 + chainHeight - blkHeight)
|
|
}
|
|
|
|
return txReply, nil
|
|
}
|
|
|
|
// handleDecodeRawTransaction handles decoderawtransaction commands.
|
|
func handleDecodeRawTransaction(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.DecodeRawTransactionCmd)
|
|
|
|
// Deserialize the transaction.
|
|
hexStr := c.HexTx
|
|
if len(hexStr)%2 != 0 {
|
|
hexStr = "0" + hexStr
|
|
}
|
|
serializedTx, err := hex.DecodeString(hexStr)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(hexStr)
|
|
}
|
|
var mtx wire.MsgTx
|
|
err = mtx.Deserialize(bytes.NewReader(serializedTx))
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDeserialization,
|
|
Message: "TX decode failed: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Create and return the result.
|
|
txReply := btcjson.TxRawDecodeResult{
|
|
Txid: mtx.TxHash().String(),
|
|
Version: mtx.Version,
|
|
Locktime: mtx.LockTime,
|
|
Vin: createVinList(&mtx),
|
|
Vout: createVoutList(&mtx, s.cfg.ChainParams, nil),
|
|
}
|
|
return txReply, nil
|
|
}
|
|
|
|
// handleDecodeScript handles decodescript commands.
|
|
func handleDecodeScript(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.DecodeScriptCmd)
|
|
|
|
// Convert the hex script to bytes.
|
|
hexStr := c.HexScript
|
|
if len(hexStr)%2 != 0 {
|
|
hexStr = "0" + hexStr
|
|
}
|
|
script, err := hex.DecodeString(hexStr)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(hexStr)
|
|
}
|
|
|
|
// The disassembled string will contain [error] inline if the script
|
|
// doesn't fully parse, so ignore the error here.
|
|
disbuf, _ := txscript.DisasmString(script)
|
|
|
|
// Get information about the script.
|
|
// Ignore the error here since an error means the script couldn't parse
|
|
// and there is no additinal information about it anyways.
|
|
scriptClass, addrs, reqSigs, _ := txscript.ExtractPkScriptAddrs(script,
|
|
s.cfg.ChainParams)
|
|
addresses := make([]string, len(addrs))
|
|
for i, addr := range addrs {
|
|
addresses[i] = addr.EncodeAddress()
|
|
}
|
|
|
|
// Convert the script itself to a pay-to-script-hash address.
|
|
p2sh, err := btcutil.NewAddressScriptHash(script, s.cfg.ChainParams)
|
|
if err != nil {
|
|
context := "Failed to convert script to pay-to-script-hash"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Generate and return the reply.
|
|
reply := btcjson.DecodeScriptResult{
|
|
Asm: disbuf,
|
|
ReqSigs: int32(reqSigs),
|
|
Type: scriptClass.String(),
|
|
Addresses: addresses,
|
|
}
|
|
if scriptClass != txscript.ScriptHashTy {
|
|
reply.P2sh = p2sh.EncodeAddress()
|
|
}
|
|
return reply, nil
|
|
}
|
|
|
|
// handleEstimateFee handles estimatefee commands.
|
|
func handleEstimateFee(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.EstimateFeeCmd)
|
|
|
|
if s.cfg.FeeEstimator == nil {
|
|
return nil, errors.New("Fee estimation disabled")
|
|
}
|
|
|
|
if c.NumBlocks <= 0 {
|
|
return -1.0, errors.New("Parameter NumBlocks must be positive")
|
|
}
|
|
|
|
feeRate, err := s.cfg.FeeEstimator.EstimateFee(uint32(c.NumBlocks))
|
|
|
|
if err != nil {
|
|
return -1.0, err
|
|
}
|
|
|
|
// Convert to satoshis per kb.
|
|
return float64(feeRate), nil
|
|
}
|
|
|
|
// handleGenerate handles generate commands.
|
|
func handleGenerate(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Respond with an error if there are no addresses to pay the
|
|
// created blocks to.
|
|
if len(cfg.miningAddrs) == 0 {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: "No payment addresses specified " +
|
|
"via --miningaddr",
|
|
}
|
|
}
|
|
|
|
// Respond with an error if there's virtually 0 chance of mining a block
|
|
// with the CPU.
|
|
if !s.cfg.ChainParams.GenerateSupported {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDifficulty,
|
|
Message: fmt.Sprintf("No support for `generate` on "+
|
|
"the current network, %s, as it's unlikely to "+
|
|
"be possible to mine a block with the CPU.",
|
|
s.cfg.ChainParams.Net),
|
|
}
|
|
}
|
|
|
|
c := cmd.(*btcjson.GenerateCmd)
|
|
|
|
// Respond with an error if the client is requesting 0 blocks to be generated.
|
|
if c.NumBlocks == 0 {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: "Please request a nonzero number of blocks to generate.",
|
|
}
|
|
}
|
|
|
|
// Create a reply
|
|
reply := make([]string, c.NumBlocks)
|
|
|
|
blockHashes, err := s.cfg.CPUMiner.GenerateNBlocks(c.NumBlocks)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: err.Error(),
|
|
}
|
|
}
|
|
|
|
// Mine the correct number of blocks, assigning the hex representation of the
|
|
// hash of each one to its place in the reply.
|
|
for i, hash := range blockHashes {
|
|
reply[i] = hash.String()
|
|
}
|
|
|
|
return reply, nil
|
|
}
|
|
|
|
// handleGetAddedNodeInfo handles getaddednodeinfo commands.
|
|
func handleGetAddedNodeInfo(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetAddedNodeInfoCmd)
|
|
|
|
// Retrieve a list of persistent (added) peers from the server and
|
|
// filter the list of peers per the specified address (if any).
|
|
peers := s.cfg.ConnMgr.PersistentPeers()
|
|
if c.Node != nil {
|
|
node := *c.Node
|
|
found := false
|
|
for i, peer := range peers {
|
|
if peer.ToPeer().Addr() == node {
|
|
peers = peers[i : i+1]
|
|
found = true
|
|
}
|
|
}
|
|
if !found {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCClientNodeNotAdded,
|
|
Message: "Node has not been added",
|
|
}
|
|
}
|
|
}
|
|
|
|
// Without the dns flag, the result is just a slice of the addresses as
|
|
// strings.
|
|
if !c.DNS {
|
|
results := make([]string, 0, len(peers))
|
|
for _, peer := range peers {
|
|
results = append(results, peer.ToPeer().Addr())
|
|
}
|
|
return results, nil
|
|
}
|
|
|
|
// With the dns flag, the result is an array of JSON objects which
|
|
// include the result of DNS lookups for each peer.
|
|
results := make([]*btcjson.GetAddedNodeInfoResult, 0, len(peers))
|
|
for _, rpcPeer := range peers {
|
|
// Set the "address" of the peer which could be an ip address
|
|
// or a domain name.
|
|
peer := rpcPeer.ToPeer()
|
|
var result btcjson.GetAddedNodeInfoResult
|
|
result.AddedNode = peer.Addr()
|
|
result.Connected = btcjson.Bool(peer.Connected())
|
|
|
|
// Split the address into host and port portions so we can do
|
|
// a DNS lookup against the host. When no port is specified in
|
|
// the address, just use the address as the host.
|
|
host, _, err := net.SplitHostPort(peer.Addr())
|
|
if err != nil {
|
|
host = peer.Addr()
|
|
}
|
|
|
|
var ipList []string
|
|
switch {
|
|
case net.ParseIP(host) != nil, strings.HasSuffix(host, ".onion"):
|
|
ipList = make([]string, 1)
|
|
ipList[0] = host
|
|
default:
|
|
// Do a DNS lookup for the address. If the lookup fails, just
|
|
// use the host.
|
|
ips, err := btcdLookup(host)
|
|
if err != nil {
|
|
ipList = make([]string, 1)
|
|
ipList[0] = host
|
|
break
|
|
}
|
|
ipList = make([]string, 0, len(ips))
|
|
for _, ip := range ips {
|
|
ipList = append(ipList, ip.String())
|
|
}
|
|
}
|
|
|
|
// Add the addresses and connection info to the result.
|
|
addrs := make([]btcjson.GetAddedNodeInfoResultAddr, 0, len(ipList))
|
|
for _, ip := range ipList {
|
|
var addr btcjson.GetAddedNodeInfoResultAddr
|
|
addr.Address = ip
|
|
addr.Connected = "false"
|
|
if ip == host && peer.Connected() {
|
|
addr.Connected = directionString(peer.Inbound())
|
|
}
|
|
addrs = append(addrs, addr)
|
|
}
|
|
result.Addresses = &addrs
|
|
results = append(results, &result)
|
|
}
|
|
return results, nil
|
|
}
|
|
|
|
// handleGetBestBlock implements the getbestblock command.
|
|
func handleGetBestBlock(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// All other "get block" commands give either the height, the
|
|
// hash, or both but require the block SHA. This gets both for
|
|
// the best block.
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
result := &btcjson.GetBestBlockResult{
|
|
Hash: best.Hash.String(),
|
|
Height: best.Height,
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
// handleGetBestBlockHash implements the getbestblockhash command.
|
|
func handleGetBestBlockHash(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
return best.Hash.String(), nil
|
|
}
|
|
|
|
// getDifficultyRatio returns the proof-of-work difficulty as a multiple of the
|
|
// minimum difficulty using the passed bits field from the header of a block.
|
|
func getDifficultyRatio(bits uint32, params *chaincfg.Params) float64 {
|
|
// The minimum difficulty is the max possible proof-of-work limit bits
|
|
// converted back to a number. Note this is not the same as the proof of
|
|
// work limit directly because the block difficulty is encoded in a block
|
|
// with the compact form which loses precision.
|
|
max := blockchain.CompactToBig(params.PowLimitBits)
|
|
target := blockchain.CompactToBig(bits)
|
|
|
|
difficulty := new(big.Rat).SetFrac(max, target)
|
|
outString := difficulty.FloatString(8)
|
|
diff, err := strconv.ParseFloat(outString, 64)
|
|
if err != nil {
|
|
rpcsLog.Errorf("Cannot get difficulty: %v", err)
|
|
return 0
|
|
}
|
|
return diff
|
|
}
|
|
|
|
// handleGetBlock implements the getblock command.
|
|
func handleGetBlock(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetBlockCmd)
|
|
|
|
// Load the raw block bytes from the database.
|
|
hash, err := chainhash.NewHashFromStr(c.Hash)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.Hash)
|
|
}
|
|
var blkBytes []byte
|
|
err = s.cfg.DB.View(func(dbTx database.Tx) error {
|
|
var err error
|
|
blkBytes, err = dbTx.FetchBlock(hash)
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCBlockNotFound,
|
|
Message: "Block not found",
|
|
}
|
|
}
|
|
|
|
// When the verbose flag isn't set, simply return the serialized block
|
|
// as a hex-encoded string.
|
|
if c.Verbose != nil && !*c.Verbose {
|
|
return hex.EncodeToString(blkBytes), nil
|
|
}
|
|
|
|
// The verbose flag is set, so generate the JSON object and return it.
|
|
|
|
// Deserialize the block.
|
|
blk, err := btcutil.NewBlockFromBytes(blkBytes)
|
|
if err != nil {
|
|
context := "Failed to deserialize block"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Get the block height from chain.
|
|
blockHeight, err := s.cfg.Chain.BlockHeightByHash(hash)
|
|
if err != nil {
|
|
context := "Failed to obtain block height"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
blk.SetHeight(blockHeight)
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
|
|
// Get next block hash unless there are none.
|
|
var nextHashString string
|
|
if blockHeight < best.Height {
|
|
nextHash, err := s.cfg.Chain.BlockHashByHeight(blockHeight + 1)
|
|
if err != nil {
|
|
context := "No next block"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
nextHashString = nextHash.String()
|
|
}
|
|
|
|
params := s.cfg.ChainParams
|
|
blockHeader := &blk.MsgBlock().Header
|
|
blockReply := btcjson.GetBlockVerboseResult{
|
|
Hash: c.Hash,
|
|
Version: blockHeader.Version,
|
|
VersionHex: fmt.Sprintf("%08x", blockHeader.Version),
|
|
MerkleRoot: blockHeader.MerkleRoot.String(),
|
|
PreviousHash: blockHeader.PrevBlock.String(),
|
|
Nonce: blockHeader.Nonce,
|
|
Time: blockHeader.Timestamp.Unix(),
|
|
Confirmations: int64(1 + best.Height - blockHeight),
|
|
Height: int64(blockHeight),
|
|
Size: int32(len(blkBytes)),
|
|
StrippedSize: int32(blk.MsgBlock().SerializeSizeStripped()),
|
|
Weight: int32(blockchain.GetBlockWeight(blk)),
|
|
Bits: strconv.FormatInt(int64(blockHeader.Bits), 16),
|
|
Difficulty: getDifficultyRatio(blockHeader.Bits, params),
|
|
NextHash: nextHashString,
|
|
}
|
|
|
|
if c.VerboseTx == nil || !*c.VerboseTx {
|
|
transactions := blk.Transactions()
|
|
txNames := make([]string, len(transactions))
|
|
for i, tx := range transactions {
|
|
txNames[i] = tx.Hash().String()
|
|
}
|
|
|
|
blockReply.Tx = txNames
|
|
} else {
|
|
txns := blk.Transactions()
|
|
rawTxns := make([]btcjson.TxRawResult, len(txns))
|
|
for i, tx := range txns {
|
|
rawTxn, err := createTxRawResult(params, tx.MsgTx(),
|
|
tx.Hash().String(), blockHeader, hash.String(),
|
|
blockHeight, best.Height)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rawTxns[i] = *rawTxn
|
|
}
|
|
blockReply.RawTx = rawTxns
|
|
}
|
|
|
|
return blockReply, nil
|
|
}
|
|
|
|
// softForkStatus converts a ThresholdState state into a human readable string
|
|
// corresponding to the particular state.
|
|
func softForkStatus(state blockchain.ThresholdState) (string, error) {
|
|
switch state {
|
|
case blockchain.ThresholdDefined:
|
|
return "defined", nil
|
|
case blockchain.ThresholdStarted:
|
|
return "started", nil
|
|
case blockchain.ThresholdLockedIn:
|
|
return "lockedin", nil
|
|
case blockchain.ThresholdActive:
|
|
return "active", nil
|
|
case blockchain.ThresholdFailed:
|
|
return "failed", nil
|
|
default:
|
|
return "", fmt.Errorf("unknown deployment state: %v", state)
|
|
}
|
|
}
|
|
|
|
// handleGetBlockChainInfo implements the getblockchaininfo command.
|
|
func handleGetBlockChainInfo(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Obtain a snapshot of the current best known blockchain state. We'll
|
|
// populate the response to this call primarily from this snapshot.
|
|
params := s.cfg.ChainParams
|
|
chain := s.cfg.Chain
|
|
chainSnapshot := chain.BestSnapshot()
|
|
|
|
chainInfo := &btcjson.GetBlockChainInfoResult{
|
|
Chain: params.Name,
|
|
Blocks: chainSnapshot.Height,
|
|
Headers: chainSnapshot.Height,
|
|
BestBlockHash: chainSnapshot.Hash.String(),
|
|
Difficulty: getDifficultyRatio(chainSnapshot.Bits, params),
|
|
MedianTime: chainSnapshot.MedianTime.Unix(),
|
|
Pruned: false,
|
|
Bip9SoftForks: make(map[string]*btcjson.Bip9SoftForkDescription),
|
|
}
|
|
|
|
// Next, populate the response with information describing the current
|
|
// status of soft-forks deployed via the super-majority block
|
|
// signalling mechanism.
|
|
height := chainSnapshot.Height
|
|
chainInfo.SoftForks = []*btcjson.SoftForkDescription{
|
|
{
|
|
ID: "bip34",
|
|
Version: 2,
|
|
Reject: struct {
|
|
Status bool `json:"status"`
|
|
}{
|
|
Status: height >= params.BIP0034Height,
|
|
},
|
|
},
|
|
{
|
|
ID: "bip66",
|
|
Version: 3,
|
|
Reject: struct {
|
|
Status bool `json:"status"`
|
|
}{
|
|
Status: height >= params.BIP0066Height,
|
|
},
|
|
},
|
|
{
|
|
ID: "bip65",
|
|
Version: 4,
|
|
Reject: struct {
|
|
Status bool `json:"status"`
|
|
}{
|
|
Status: height >= params.BIP0065Height,
|
|
},
|
|
},
|
|
}
|
|
|
|
// Finally, query the BIP0009 version bits state for all currently
|
|
// defined BIP0009 soft-fork deployments.
|
|
for deployment, deploymentDetails := range params.Deployments {
|
|
// Map the integer deployment ID into a human readable
|
|
// fork-name.
|
|
var forkName string
|
|
switch deployment {
|
|
case chaincfg.DeploymentTestDummy:
|
|
forkName = "dummy"
|
|
|
|
case chaincfg.DeploymentCSV:
|
|
forkName = "csv"
|
|
|
|
case chaincfg.DeploymentSegwit:
|
|
forkName = "segwit"
|
|
|
|
default:
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: fmt.Sprintf("Unknown deployment %v "+
|
|
"detected", deployment),
|
|
}
|
|
}
|
|
|
|
// Query the chain for the current status of the deployment as
|
|
// identified by its deployment ID.
|
|
deploymentStatus, err := chain.ThresholdState(uint32(deployment))
|
|
if err != nil {
|
|
context := "Failed to obtain deployment status"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Attempt to convert the current deployment status into a
|
|
// human readable string. If the status is unrecognized, then a
|
|
// non-nil error is returned.
|
|
statusString, err := softForkStatus(deploymentStatus)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: fmt.Sprintf("unknown deployment status: %v",
|
|
deploymentStatus),
|
|
}
|
|
}
|
|
|
|
// Finally, populate the soft-fork description with all the
|
|
// information gathered above.
|
|
chainInfo.Bip9SoftForks[forkName] = &btcjson.Bip9SoftForkDescription{
|
|
Status: strings.ToLower(statusString),
|
|
Bit: deploymentDetails.BitNumber,
|
|
StartTime: int64(deploymentDetails.StartTime),
|
|
Timeout: int64(deploymentDetails.ExpireTime),
|
|
}
|
|
}
|
|
|
|
return chainInfo, nil
|
|
}
|
|
|
|
// handleGetBlockCount implements the getblockcount command.
|
|
func handleGetBlockCount(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
return int64(best.Height), nil
|
|
}
|
|
|
|
// handleGetBlockHash implements the getblockhash command.
|
|
func handleGetBlockHash(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetBlockHashCmd)
|
|
hash, err := s.cfg.Chain.BlockHashByHeight(int32(c.Index))
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCOutOfRange,
|
|
Message: "Block number out of range",
|
|
}
|
|
}
|
|
|
|
return hash.String(), nil
|
|
}
|
|
|
|
// handleGetBlockHeader implements the getblockheader command.
|
|
func handleGetBlockHeader(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetBlockHeaderCmd)
|
|
|
|
// Fetch the header from chain.
|
|
hash, err := chainhash.NewHashFromStr(c.Hash)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.Hash)
|
|
}
|
|
blockHeader, err := s.cfg.Chain.HeaderByHash(hash)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCBlockNotFound,
|
|
Message: "Block not found",
|
|
}
|
|
}
|
|
|
|
// When the verbose flag isn't set, simply return the serialized block
|
|
// header as a hex-encoded string.
|
|
if c.Verbose != nil && !*c.Verbose {
|
|
var headerBuf bytes.Buffer
|
|
err := blockHeader.Serialize(&headerBuf)
|
|
if err != nil {
|
|
context := "Failed to serialize block header"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
return hex.EncodeToString(headerBuf.Bytes()), nil
|
|
}
|
|
|
|
// The verbose flag is set, so generate the JSON object and return it.
|
|
|
|
// Get the block height from chain.
|
|
blockHeight, err := s.cfg.Chain.BlockHeightByHash(hash)
|
|
if err != nil {
|
|
context := "Failed to obtain block height"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
|
|
// Get next block hash unless there are none.
|
|
var nextHashString string
|
|
if blockHeight < best.Height {
|
|
nextHash, err := s.cfg.Chain.BlockHashByHeight(blockHeight + 1)
|
|
if err != nil {
|
|
context := "No next block"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
nextHashString = nextHash.String()
|
|
}
|
|
|
|
params := s.cfg.ChainParams
|
|
blockHeaderReply := btcjson.GetBlockHeaderVerboseResult{
|
|
Hash: c.Hash,
|
|
Confirmations: int64(1 + best.Height - blockHeight),
|
|
Height: blockHeight,
|
|
Version: blockHeader.Version,
|
|
VersionHex: fmt.Sprintf("%08x", blockHeader.Version),
|
|
MerkleRoot: blockHeader.MerkleRoot.String(),
|
|
NextHash: nextHashString,
|
|
PreviousHash: blockHeader.PrevBlock.String(),
|
|
Nonce: uint64(blockHeader.Nonce),
|
|
Time: blockHeader.Timestamp.Unix(),
|
|
Bits: strconv.FormatInt(int64(blockHeader.Bits), 16),
|
|
Difficulty: getDifficultyRatio(blockHeader.Bits, params),
|
|
}
|
|
return blockHeaderReply, nil
|
|
}
|
|
|
|
// encodeTemplateID encodes the passed details into an ID that can be used to
|
|
// uniquely identify a block template.
|
|
func encodeTemplateID(prevHash *chainhash.Hash, lastGenerated time.Time) string {
|
|
return fmt.Sprintf("%s-%d", prevHash.String(), lastGenerated.Unix())
|
|
}
|
|
|
|
// decodeTemplateID decodes an ID that is used to uniquely identify a block
|
|
// template. This is mainly used as a mechanism to track when to update clients
|
|
// that are using long polling for block templates. The ID consists of the
|
|
// previous block hash for the associated template and the time the associated
|
|
// template was generated.
|
|
func decodeTemplateID(templateID string) (*chainhash.Hash, int64, error) {
|
|
fields := strings.Split(templateID, "-")
|
|
if len(fields) != 2 {
|
|
return nil, 0, errors.New("invalid longpollid format")
|
|
}
|
|
|
|
prevHash, err := chainhash.NewHashFromStr(fields[0])
|
|
if err != nil {
|
|
return nil, 0, errors.New("invalid longpollid format")
|
|
}
|
|
lastGenerated, err := strconv.ParseInt(fields[1], 10, 64)
|
|
if err != nil {
|
|
return nil, 0, errors.New("invalid longpollid format")
|
|
}
|
|
|
|
return prevHash, lastGenerated, nil
|
|
}
|
|
|
|
// notifyLongPollers notifies any channels that have been registered to be
|
|
// notified when block templates are stale.
|
|
//
|
|
// This function MUST be called with the state locked.
|
|
func (state *gbtWorkState) notifyLongPollers(latestHash *chainhash.Hash, lastGenerated time.Time) {
|
|
// Notify anything that is waiting for a block template update from a
|
|
// hash which is not the hash of the tip of the best chain since their
|
|
// work is now invalid.
|
|
for hash, channels := range state.notifyMap {
|
|
if !hash.IsEqual(latestHash) {
|
|
for _, c := range channels {
|
|
close(c)
|
|
}
|
|
delete(state.notifyMap, hash)
|
|
}
|
|
}
|
|
|
|
// Return now if the provided last generated timestamp has not been
|
|
// initialized.
|
|
if lastGenerated.IsZero() {
|
|
return
|
|
}
|
|
|
|
// Return now if there is nothing registered for updates to the current
|
|
// best block hash.
|
|
channels, ok := state.notifyMap[*latestHash]
|
|
if !ok {
|
|
return
|
|
}
|
|
|
|
// Notify anything that is waiting for a block template update from a
|
|
// block template generated before the most recently generated block
|
|
// template.
|
|
lastGeneratedUnix := lastGenerated.Unix()
|
|
for lastGen, c := range channels {
|
|
if lastGen < lastGeneratedUnix {
|
|
close(c)
|
|
delete(channels, lastGen)
|
|
}
|
|
}
|
|
|
|
// Remove the entry altogether if there are no more registered
|
|
// channels.
|
|
if len(channels) == 0 {
|
|
delete(state.notifyMap, *latestHash)
|
|
}
|
|
}
|
|
|
|
// NotifyBlockConnected uses the newly-connected block to notify any long poll
|
|
// clients with a new block template when their existing block template is
|
|
// stale due to the newly connected block.
|
|
func (state *gbtWorkState) NotifyBlockConnected(blockHash *chainhash.Hash) {
|
|
go func() {
|
|
state.Lock()
|
|
defer state.Unlock()
|
|
|
|
state.notifyLongPollers(blockHash, state.lastTxUpdate)
|
|
}()
|
|
}
|
|
|
|
// NotifyMempoolTx uses the new last updated time for the transaction memory
|
|
// pool to notify any long poll clients with a new block template when their
|
|
// existing block template is stale due to enough time passing and the contents
|
|
// of the memory pool changing.
|
|
func (state *gbtWorkState) NotifyMempoolTx(lastUpdated time.Time) {
|
|
go func() {
|
|
state.Lock()
|
|
defer state.Unlock()
|
|
|
|
// No need to notify anything if no block templates have been generated
|
|
// yet.
|
|
if state.prevHash == nil || state.lastGenerated.IsZero() {
|
|
return
|
|
}
|
|
|
|
if time.Now().After(state.lastGenerated.Add(time.Second *
|
|
gbtRegenerateSeconds)) {
|
|
|
|
state.notifyLongPollers(state.prevHash, lastUpdated)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// templateUpdateChan returns a channel that will be closed once the block
|
|
// template associated with the passed previous hash and last generated time
|
|
// is stale. The function will return existing channels for duplicate
|
|
// parameters which allows multiple clients to wait for the same block template
|
|
// without requiring a different channel for each client.
|
|
//
|
|
// This function MUST be called with the state locked.
|
|
func (state *gbtWorkState) templateUpdateChan(prevHash *chainhash.Hash, lastGenerated int64) chan struct{} {
|
|
// Either get the current list of channels waiting for updates about
|
|
// changes to block template for the previous hash or create a new one.
|
|
channels, ok := state.notifyMap[*prevHash]
|
|
if !ok {
|
|
m := make(map[int64]chan struct{})
|
|
state.notifyMap[*prevHash] = m
|
|
channels = m
|
|
}
|
|
|
|
// Get the current channel associated with the time the block template
|
|
// was last generated or create a new one.
|
|
c, ok := channels[lastGenerated]
|
|
if !ok {
|
|
c = make(chan struct{})
|
|
channels[lastGenerated] = c
|
|
}
|
|
|
|
return c
|
|
}
|
|
|
|
// updateBlockTemplate creates or updates a block template for the work state.
|
|
// A new block template will be generated when the current best block has
|
|
// changed or the transactions in the memory pool have been updated and it has
|
|
// been long enough since the last template was generated. Otherwise, the
|
|
// timestamp for the existing block template is updated (and possibly the
|
|
// difficulty on testnet per the consesus rules). Finally, if the
|
|
// useCoinbaseValue flag is false and the existing block template does not
|
|
// already contain a valid payment address, the block template will be updated
|
|
// with a randomly selected payment address from the list of configured
|
|
// addresses.
|
|
//
|
|
// This function MUST be called with the state locked.
|
|
func (state *gbtWorkState) updateBlockTemplate(s *rpcServer, useCoinbaseValue bool) error {
|
|
generator := s.cfg.Generator
|
|
lastTxUpdate := generator.TxSource().LastUpdated()
|
|
if lastTxUpdate.IsZero() {
|
|
lastTxUpdate = time.Now()
|
|
}
|
|
|
|
// Generate a new block template when the current best block has
|
|
// changed or the transactions in the memory pool have been updated and
|
|
// it has been at least gbtRegenerateSecond since the last template was
|
|
// generated.
|
|
var msgBlock *wire.MsgBlock
|
|
var targetDifficulty string
|
|
latestHash := &s.cfg.Chain.BestSnapshot().Hash
|
|
template := state.template
|
|
if template == nil || state.prevHash == nil ||
|
|
!state.prevHash.IsEqual(latestHash) ||
|
|
(state.lastTxUpdate != lastTxUpdate &&
|
|
time.Now().After(state.lastGenerated.Add(time.Second*
|
|
gbtRegenerateSeconds))) {
|
|
|
|
// Reset the previous best hash the block template was generated
|
|
// against so any errors below cause the next invocation to try
|
|
// again.
|
|
state.prevHash = nil
|
|
|
|
// Choose a payment address at random if the caller requests a
|
|
// full coinbase as opposed to only the pertinent details needed
|
|
// to create their own coinbase.
|
|
var payAddr btcutil.Address
|
|
if !useCoinbaseValue {
|
|
payAddr = cfg.miningAddrs[rand.Intn(len(cfg.miningAddrs))]
|
|
}
|
|
|
|
// Create a new block template that has a coinbase which anyone
|
|
// can redeem. This is only acceptable because the returned
|
|
// block template doesn't include the coinbase, so the caller
|
|
// will ultimately create their own coinbase which pays to the
|
|
// appropriate address(es).
|
|
blkTemplate, err := generator.NewBlockTemplate(payAddr)
|
|
if err != nil {
|
|
return internalRPCError("Failed to create new block "+
|
|
"template: "+err.Error(), "")
|
|
}
|
|
template = blkTemplate
|
|
msgBlock = template.Block
|
|
targetDifficulty = fmt.Sprintf("%064x",
|
|
blockchain.CompactToBig(msgBlock.Header.Bits))
|
|
|
|
// Get the minimum allowed timestamp for the block based on the
|
|
// median timestamp of the last several blocks per the chain
|
|
// consensus rules.
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
minTimestamp := mining.MinimumMedianTime(best)
|
|
|
|
// Update work state to ensure another block template isn't
|
|
// generated until needed.
|
|
state.template = template
|
|
state.lastGenerated = time.Now()
|
|
state.lastTxUpdate = lastTxUpdate
|
|
state.prevHash = latestHash
|
|
state.minTimestamp = minTimestamp
|
|
|
|
rpcsLog.Debugf("Generated block template (timestamp %v, "+
|
|
"target %s, merkle root %s)",
|
|
msgBlock.Header.Timestamp, targetDifficulty,
|
|
msgBlock.Header.MerkleRoot)
|
|
|
|
// Notify any clients that are long polling about the new
|
|
// template.
|
|
state.notifyLongPollers(latestHash, lastTxUpdate)
|
|
} else {
|
|
// At this point, there is a saved block template and another
|
|
// request for a template was made, but either the available
|
|
// transactions haven't change or it hasn't been long enough to
|
|
// trigger a new block template to be generated. So, update the
|
|
// existing block template.
|
|
|
|
// When the caller requires a full coinbase as opposed to only
|
|
// the pertinent details needed to create their own coinbase,
|
|
// add a payment address to the output of the coinbase of the
|
|
// template if it doesn't already have one. Since this requires
|
|
// mining addresses to be specified via the config, an error is
|
|
// returned if none have been specified.
|
|
if !useCoinbaseValue && !template.ValidPayAddress {
|
|
// Choose a payment address at random.
|
|
payToAddr := cfg.miningAddrs[rand.Intn(len(cfg.miningAddrs))]
|
|
|
|
// Update the block coinbase output of the template to
|
|
// pay to the randomly selected payment address.
|
|
pkScript, err := txscript.PayToAddrScript(payToAddr)
|
|
if err != nil {
|
|
context := "Failed to create pay-to-addr script"
|
|
return internalRPCError(err.Error(), context)
|
|
}
|
|
template.Block.Transactions[0].TxOut[0].PkScript = pkScript
|
|
template.ValidPayAddress = true
|
|
|
|
// Update the merkle root.
|
|
block := btcutil.NewBlock(template.Block)
|
|
merkles := blockchain.BuildMerkleTreeStore(block.Transactions(), false)
|
|
template.Block.Header.MerkleRoot = *merkles[len(merkles)-1]
|
|
}
|
|
|
|
// Set locals for convenience.
|
|
msgBlock = template.Block
|
|
targetDifficulty = fmt.Sprintf("%064x",
|
|
blockchain.CompactToBig(msgBlock.Header.Bits))
|
|
|
|
// Update the time of the block template to the current time
|
|
// while accounting for the median time of the past several
|
|
// blocks per the chain consensus rules.
|
|
generator.UpdateBlockTime(msgBlock)
|
|
msgBlock.Header.Nonce = 0
|
|
|
|
rpcsLog.Debugf("Updated block template (timestamp %v, "+
|
|
"target %s)", msgBlock.Header.Timestamp,
|
|
targetDifficulty)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// blockTemplateResult returns the current block template associated with the
|
|
// state as a btcjson.GetBlockTemplateResult that is ready to be encoded to JSON
|
|
// and returned to the caller.
|
|
//
|
|
// This function MUST be called with the state locked.
|
|
func (state *gbtWorkState) blockTemplateResult(useCoinbaseValue bool, submitOld *bool) (*btcjson.GetBlockTemplateResult, error) {
|
|
// Ensure the timestamps are still in valid range for the template.
|
|
// This should really only ever happen if the local clock is changed
|
|
// after the template is generated, but it's important to avoid serving
|
|
// invalid block templates.
|
|
template := state.template
|
|
msgBlock := template.Block
|
|
header := &msgBlock.Header
|
|
adjustedTime := state.timeSource.AdjustedTime()
|
|
maxTime := adjustedTime.Add(time.Second * blockchain.MaxTimeOffsetSeconds)
|
|
if header.Timestamp.After(maxTime) {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCOutOfRange,
|
|
Message: fmt.Sprintf("The template time is after the "+
|
|
"maximum allowed time for a block - template "+
|
|
"time %v, maximum time %v", adjustedTime,
|
|
maxTime),
|
|
}
|
|
}
|
|
|
|
// Convert each transaction in the block template to a template result
|
|
// transaction. The result does not include the coinbase, so notice
|
|
// the adjustments to the various lengths and indices.
|
|
numTx := len(msgBlock.Transactions)
|
|
transactions := make([]btcjson.GetBlockTemplateResultTx, 0, numTx-1)
|
|
txIndex := make(map[chainhash.Hash]int64, numTx)
|
|
for i, tx := range msgBlock.Transactions {
|
|
txHash := tx.TxHash()
|
|
txIndex[txHash] = int64(i)
|
|
|
|
// Skip the coinbase transaction.
|
|
if i == 0 {
|
|
continue
|
|
}
|
|
|
|
// Create an array of 1-based indices to transactions that come
|
|
// before this one in the transactions list which this one
|
|
// depends on. This is necessary since the created block must
|
|
// ensure proper ordering of the dependencies. A map is used
|
|
// before creating the final array to prevent duplicate entries
|
|
// when multiple inputs reference the same transaction.
|
|
dependsMap := make(map[int64]struct{})
|
|
for _, txIn := range tx.TxIn {
|
|
if idx, ok := txIndex[txIn.PreviousOutPoint.Hash]; ok {
|
|
dependsMap[idx] = struct{}{}
|
|
}
|
|
}
|
|
depends := make([]int64, 0, len(dependsMap))
|
|
for idx := range dependsMap {
|
|
depends = append(depends, idx)
|
|
}
|
|
|
|
// Serialize the transaction for later conversion to hex.
|
|
txBuf := bytes.NewBuffer(make([]byte, 0, tx.SerializeSize()))
|
|
if err := tx.Serialize(txBuf); err != nil {
|
|
context := "Failed to serialize transaction"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
bTx := btcutil.NewTx(tx)
|
|
resultTx := btcjson.GetBlockTemplateResultTx{
|
|
Data: hex.EncodeToString(txBuf.Bytes()),
|
|
Hash: txHash.String(),
|
|
Depends: depends,
|
|
Fee: template.Fees[i],
|
|
SigOps: template.SigOpCosts[i],
|
|
Weight: blockchain.GetTransactionWeight(bTx),
|
|
}
|
|
transactions = append(transactions, resultTx)
|
|
}
|
|
|
|
// Generate the block template reply. Note that following mutations are
|
|
// implied by the included or omission of fields:
|
|
// Including MinTime -> time/decrement
|
|
// Omitting CoinbaseTxn -> coinbase, generation
|
|
targetDifficulty := fmt.Sprintf("%064x", blockchain.CompactToBig(header.Bits))
|
|
templateID := encodeTemplateID(state.prevHash, state.lastGenerated)
|
|
reply := btcjson.GetBlockTemplateResult{
|
|
Bits: strconv.FormatInt(int64(header.Bits), 16),
|
|
CurTime: header.Timestamp.Unix(),
|
|
Height: int64(template.Height),
|
|
PreviousHash: header.PrevBlock.String(),
|
|
WeightLimit: blockchain.MaxBlockWeight,
|
|
SigOpLimit: blockchain.MaxBlockSigOpsCost,
|
|
SizeLimit: wire.MaxBlockPayload,
|
|
Transactions: transactions,
|
|
Version: header.Version,
|
|
LongPollID: templateID,
|
|
SubmitOld: submitOld,
|
|
Target: targetDifficulty,
|
|
MinTime: state.minTimestamp.Unix(),
|
|
MaxTime: maxTime.Unix(),
|
|
Mutable: gbtMutableFields,
|
|
NonceRange: gbtNonceRange,
|
|
Capabilities: gbtCapabilities,
|
|
}
|
|
// If the generated block template includes transactions with witness
|
|
// data, then include the witness commitment in the GBT result.
|
|
if template.WitnessCommitment != nil {
|
|
reply.DefaultWitnessCommitment = hex.EncodeToString(template.WitnessCommitment)
|
|
}
|
|
|
|
if useCoinbaseValue {
|
|
reply.CoinbaseAux = gbtCoinbaseAux
|
|
reply.CoinbaseValue = &msgBlock.Transactions[0].TxOut[0].Value
|
|
} else {
|
|
// Ensure the template has a valid payment address associated
|
|
// with it when a full coinbase is requested.
|
|
if !template.ValidPayAddress {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: "A coinbase transaction has been " +
|
|
"requested, but the server has not " +
|
|
"been configured with any payment " +
|
|
"addresses via --miningaddr",
|
|
}
|
|
}
|
|
|
|
// Serialize the transaction for conversion to hex.
|
|
tx := msgBlock.Transactions[0]
|
|
txBuf := bytes.NewBuffer(make([]byte, 0, tx.SerializeSize()))
|
|
if err := tx.Serialize(txBuf); err != nil {
|
|
context := "Failed to serialize transaction"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
resultTx := btcjson.GetBlockTemplateResultTx{
|
|
Data: hex.EncodeToString(txBuf.Bytes()),
|
|
Hash: tx.TxHash().String(),
|
|
Depends: []int64{},
|
|
Fee: template.Fees[0],
|
|
SigOps: template.SigOpCosts[0],
|
|
}
|
|
|
|
reply.CoinbaseTxn = &resultTx
|
|
}
|
|
|
|
return &reply, nil
|
|
}
|
|
|
|
// handleGetBlockTemplateLongPoll is a helper for handleGetBlockTemplateRequest
|
|
// which deals with handling long polling for block templates. When a caller
|
|
// sends a request with a long poll ID that was previously returned, a response
|
|
// is not sent until the caller should stop working on the previous block
|
|
// template in favor of the new one. In particular, this is the case when the
|
|
// old block template is no longer valid due to a solution already being found
|
|
// and added to the block chain, or new transactions have shown up and some time
|
|
// has passed without finding a solution.
|
|
//
|
|
// See https://en.bitcoin.it/wiki/BIP_0022 for more details.
|
|
func handleGetBlockTemplateLongPoll(s *rpcServer, longPollID string, useCoinbaseValue bool, closeChan <-chan struct{}) (interface{}, error) {
|
|
state := s.gbtWorkState
|
|
state.Lock()
|
|
// The state unlock is intentionally not deferred here since it needs to
|
|
// be manually unlocked before waiting for a notification about block
|
|
// template changes.
|
|
|
|
if err := state.updateBlockTemplate(s, useCoinbaseValue); err != nil {
|
|
state.Unlock()
|
|
return nil, err
|
|
}
|
|
|
|
// Just return the current block template if the long poll ID provided by
|
|
// the caller is invalid.
|
|
prevHash, lastGenerated, err := decodeTemplateID(longPollID)
|
|
if err != nil {
|
|
result, err := state.blockTemplateResult(useCoinbaseValue, nil)
|
|
if err != nil {
|
|
state.Unlock()
|
|
return nil, err
|
|
}
|
|
|
|
state.Unlock()
|
|
return result, nil
|
|
}
|
|
|
|
// Return the block template now if the specific block template
|
|
// identified by the long poll ID no longer matches the current block
|
|
// template as this means the provided template is stale.
|
|
prevTemplateHash := &state.template.Block.Header.PrevBlock
|
|
if !prevHash.IsEqual(prevTemplateHash) ||
|
|
lastGenerated != state.lastGenerated.Unix() {
|
|
|
|
// Include whether or not it is valid to submit work against the
|
|
// old block template depending on whether or not a solution has
|
|
// already been found and added to the block chain.
|
|
submitOld := prevHash.IsEqual(prevTemplateHash)
|
|
result, err := state.blockTemplateResult(useCoinbaseValue,
|
|
&submitOld)
|
|
if err != nil {
|
|
state.Unlock()
|
|
return nil, err
|
|
}
|
|
|
|
state.Unlock()
|
|
return result, nil
|
|
}
|
|
|
|
// Register the previous hash and last generated time for notifications
|
|
// Get a channel that will be notified when the template associated with
|
|
// the provided ID is stale and a new block template should be returned to
|
|
// the caller.
|
|
longPollChan := state.templateUpdateChan(prevHash, lastGenerated)
|
|
state.Unlock()
|
|
|
|
select {
|
|
// When the client closes before it's time to send a reply, just return
|
|
// now so the goroutine doesn't hang around.
|
|
case <-closeChan:
|
|
return nil, ErrClientQuit
|
|
|
|
// Wait until signal received to send the reply.
|
|
case <-longPollChan:
|
|
// Fallthrough
|
|
}
|
|
|
|
// Get the lastest block template
|
|
state.Lock()
|
|
defer state.Unlock()
|
|
|
|
if err := state.updateBlockTemplate(s, useCoinbaseValue); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Include whether or not it is valid to submit work against the old
|
|
// block template depending on whether or not a solution has already
|
|
// been found and added to the block chain.
|
|
submitOld := prevHash.IsEqual(&state.template.Block.Header.PrevBlock)
|
|
result, err := state.blockTemplateResult(useCoinbaseValue, &submitOld)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
// handleGetBlockTemplateRequest is a helper for handleGetBlockTemplate which
|
|
// deals with generating and returning block templates to the caller. It
|
|
// handles both long poll requests as specified by BIP 0022 as well as regular
|
|
// requests. In addition, it detects the capabilities reported by the caller
|
|
// in regards to whether or not it supports creating its own coinbase (the
|
|
// coinbasetxn and coinbasevalue capabilities) and modifies the returned block
|
|
// template accordingly.
|
|
func handleGetBlockTemplateRequest(s *rpcServer, request *btcjson.TemplateRequest, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Extract the relevant passed capabilities and restrict the result to
|
|
// either a coinbase value or a coinbase transaction object depending on
|
|
// the request. Default to only providing a coinbase value.
|
|
useCoinbaseValue := true
|
|
if request != nil {
|
|
var hasCoinbaseValue, hasCoinbaseTxn bool
|
|
for _, capability := range request.Capabilities {
|
|
switch capability {
|
|
case "coinbasetxn":
|
|
hasCoinbaseTxn = true
|
|
case "coinbasevalue":
|
|
hasCoinbaseValue = true
|
|
}
|
|
}
|
|
|
|
if hasCoinbaseTxn && !hasCoinbaseValue {
|
|
useCoinbaseValue = false
|
|
}
|
|
}
|
|
|
|
// When a coinbase transaction has been requested, respond with an error
|
|
// if there are no addresses to pay the created block template to.
|
|
if !useCoinbaseValue && len(cfg.miningAddrs) == 0 {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: "A coinbase transaction has been requested, " +
|
|
"but the server has not been configured with " +
|
|
"any payment addresses via --miningaddr",
|
|
}
|
|
}
|
|
|
|
// Return an error if there are no peers connected since there is no
|
|
// way to relay a found block or receive transactions to work on.
|
|
// However, allow this state when running in the regression test or
|
|
// simulation test mode.
|
|
if !(cfg.RegressionTest || cfg.SimNet) &&
|
|
s.cfg.ConnMgr.ConnectedCount() == 0 {
|
|
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCClientNotConnected,
|
|
Message: "Bitcoin is not connected",
|
|
}
|
|
}
|
|
|
|
// No point in generating or accepting work before the chain is synced.
|
|
currentHeight := s.cfg.Chain.BestSnapshot().Height
|
|
if currentHeight != 0 && !s.cfg.SyncMgr.IsCurrent() {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCClientInInitialDownload,
|
|
Message: "Bitcoin is downloading blocks...",
|
|
}
|
|
}
|
|
|
|
// When a long poll ID was provided, this is a long poll request by the
|
|
// client to be notified when block template referenced by the ID should
|
|
// be replaced with a new one.
|
|
if request != nil && request.LongPollID != "" {
|
|
return handleGetBlockTemplateLongPoll(s, request.LongPollID,
|
|
useCoinbaseValue, closeChan)
|
|
}
|
|
|
|
// Protect concurrent access when updating block templates.
|
|
state := s.gbtWorkState
|
|
state.Lock()
|
|
defer state.Unlock()
|
|
|
|
// Get and return a block template. A new block template will be
|
|
// generated when the current best block has changed or the transactions
|
|
// in the memory pool have been updated and it has been at least five
|
|
// seconds since the last template was generated. Otherwise, the
|
|
// timestamp for the existing block template is updated (and possibly
|
|
// the difficulty on testnet per the consesus rules).
|
|
if err := state.updateBlockTemplate(s, useCoinbaseValue); err != nil {
|
|
return nil, err
|
|
}
|
|
return state.blockTemplateResult(useCoinbaseValue, nil)
|
|
}
|
|
|
|
// chainErrToGBTErrString converts an error returned from btcchain to a string
|
|
// which matches the reasons and format described in BIP0022 for rejection
|
|
// reasons.
|
|
func chainErrToGBTErrString(err error) string {
|
|
// When the passed error is not a RuleError, just return a generic
|
|
// rejected string with the error text.
|
|
ruleErr, ok := err.(blockchain.RuleError)
|
|
if !ok {
|
|
return "rejected: " + err.Error()
|
|
}
|
|
|
|
switch ruleErr.ErrorCode {
|
|
case blockchain.ErrDuplicateBlock:
|
|
return "duplicate"
|
|
case blockchain.ErrBlockTooBig:
|
|
return "bad-blk-length"
|
|
case blockchain.ErrBlockWeightTooHigh:
|
|
return "bad-blk-weight"
|
|
case blockchain.ErrBlockVersionTooOld:
|
|
return "bad-version"
|
|
case blockchain.ErrInvalidTime:
|
|
return "bad-time"
|
|
case blockchain.ErrTimeTooOld:
|
|
return "time-too-old"
|
|
case blockchain.ErrTimeTooNew:
|
|
return "time-too-new"
|
|
case blockchain.ErrDifficultyTooLow:
|
|
return "bad-diffbits"
|
|
case blockchain.ErrUnexpectedDifficulty:
|
|
return "bad-diffbits"
|
|
case blockchain.ErrHighHash:
|
|
return "high-hash"
|
|
case blockchain.ErrBadMerkleRoot:
|
|
return "bad-txnmrklroot"
|
|
case blockchain.ErrBadCheckpoint:
|
|
return "bad-checkpoint"
|
|
case blockchain.ErrForkTooOld:
|
|
return "fork-too-old"
|
|
case blockchain.ErrCheckpointTimeTooOld:
|
|
return "checkpoint-time-too-old"
|
|
case blockchain.ErrNoTransactions:
|
|
return "bad-txns-none"
|
|
case blockchain.ErrNoTxInputs:
|
|
return "bad-txns-noinputs"
|
|
case blockchain.ErrNoTxOutputs:
|
|
return "bad-txns-nooutputs"
|
|
case blockchain.ErrTxTooBig:
|
|
return "bad-txns-size"
|
|
case blockchain.ErrBadTxOutValue:
|
|
return "bad-txns-outputvalue"
|
|
case blockchain.ErrDuplicateTxInputs:
|
|
return "bad-txns-dupinputs"
|
|
case blockchain.ErrBadTxInput:
|
|
return "bad-txns-badinput"
|
|
case blockchain.ErrMissingTxOut:
|
|
return "bad-txns-missinginput"
|
|
case blockchain.ErrUnfinalizedTx:
|
|
return "bad-txns-unfinalizedtx"
|
|
case blockchain.ErrDuplicateTx:
|
|
return "bad-txns-duplicate"
|
|
case blockchain.ErrOverwriteTx:
|
|
return "bad-txns-overwrite"
|
|
case blockchain.ErrImmatureSpend:
|
|
return "bad-txns-maturity"
|
|
case blockchain.ErrSpendTooHigh:
|
|
return "bad-txns-highspend"
|
|
case blockchain.ErrBadFees:
|
|
return "bad-txns-fees"
|
|
case blockchain.ErrTooManySigOps:
|
|
return "high-sigops"
|
|
case blockchain.ErrFirstTxNotCoinbase:
|
|
return "bad-txns-nocoinbase"
|
|
case blockchain.ErrMultipleCoinbases:
|
|
return "bad-txns-multicoinbase"
|
|
case blockchain.ErrBadCoinbaseScriptLen:
|
|
return "bad-cb-length"
|
|
case blockchain.ErrBadCoinbaseValue:
|
|
return "bad-cb-value"
|
|
case blockchain.ErrMissingCoinbaseHeight:
|
|
return "bad-cb-height"
|
|
case blockchain.ErrBadCoinbaseHeight:
|
|
return "bad-cb-height"
|
|
case blockchain.ErrScriptMalformed:
|
|
return "bad-script-malformed"
|
|
case blockchain.ErrScriptValidation:
|
|
return "bad-script-validate"
|
|
case blockchain.ErrUnexpectedWitness:
|
|
return "unexpected-witness"
|
|
case blockchain.ErrInvalidWitnessCommitment:
|
|
return "bad-witness-nonce-size"
|
|
case blockchain.ErrWitnessCommitmentMismatch:
|
|
return "bad-witness-merkle-match"
|
|
case blockchain.ErrPreviousBlockUnknown:
|
|
return "prev-blk-not-found"
|
|
case blockchain.ErrInvalidAncestorBlock:
|
|
return "bad-prevblk"
|
|
case blockchain.ErrPrevBlockNotBest:
|
|
return "inconclusive-not-best-prvblk"
|
|
}
|
|
|
|
return "rejected: " + err.Error()
|
|
}
|
|
|
|
// handleGetBlockTemplateProposal is a helper for handleGetBlockTemplate which
|
|
// deals with block proposals.
|
|
//
|
|
// See https://en.bitcoin.it/wiki/BIP_0023 for more details.
|
|
func handleGetBlockTemplateProposal(s *rpcServer, request *btcjson.TemplateRequest) (interface{}, error) {
|
|
hexData := request.Data
|
|
if hexData == "" {
|
|
return false, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCType,
|
|
Message: fmt.Sprintf("Data must contain the " +
|
|
"hex-encoded serialized block that is being " +
|
|
"proposed"),
|
|
}
|
|
}
|
|
|
|
// Ensure the provided data is sane and deserialize the proposed block.
|
|
if len(hexData)%2 != 0 {
|
|
hexData = "0" + hexData
|
|
}
|
|
dataBytes, err := hex.DecodeString(hexData)
|
|
if err != nil {
|
|
return false, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDeserialization,
|
|
Message: fmt.Sprintf("Data must be "+
|
|
"hexadecimal string (not %q)", hexData),
|
|
}
|
|
}
|
|
var msgBlock wire.MsgBlock
|
|
if err := msgBlock.Deserialize(bytes.NewReader(dataBytes)); err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDeserialization,
|
|
Message: "Block decode failed: " + err.Error(),
|
|
}
|
|
}
|
|
block := btcutil.NewBlock(&msgBlock)
|
|
|
|
// Ensure the block is building from the expected previous block.
|
|
expectedPrevHash := s.cfg.Chain.BestSnapshot().Hash
|
|
prevHash := &block.MsgBlock().Header.PrevBlock
|
|
if !expectedPrevHash.IsEqual(prevHash) {
|
|
return "bad-prevblk", nil
|
|
}
|
|
|
|
if err := s.cfg.Chain.CheckConnectBlockTemplate(block); err != nil {
|
|
if _, ok := err.(blockchain.RuleError); !ok {
|
|
errStr := fmt.Sprintf("Failed to process block proposal: %v", err)
|
|
rpcsLog.Error(errStr)
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCVerify,
|
|
Message: errStr,
|
|
}
|
|
}
|
|
|
|
rpcsLog.Infof("Rejected block proposal: %v", err)
|
|
return chainErrToGBTErrString(err), nil
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
// handleGetBlockTemplate implements the getblocktemplate command.
|
|
//
|
|
// See https://en.bitcoin.it/wiki/BIP_0022 and
|
|
// https://en.bitcoin.it/wiki/BIP_0023 for more details.
|
|
func handleGetBlockTemplate(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetBlockTemplateCmd)
|
|
request := c.Request
|
|
|
|
// Set the default mode and override it if supplied.
|
|
mode := "template"
|
|
if request != nil && request.Mode != "" {
|
|
mode = request.Mode
|
|
}
|
|
|
|
switch mode {
|
|
case "template":
|
|
return handleGetBlockTemplateRequest(s, request, closeChan)
|
|
case "proposal":
|
|
return handleGetBlockTemplateProposal(s, request)
|
|
}
|
|
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidParameter,
|
|
Message: "Invalid mode",
|
|
}
|
|
}
|
|
|
|
// handleGetCFilter implements the getcfilter command.
|
|
func handleGetCFilter(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
if s.cfg.CfIndex == nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCNoCFIndex,
|
|
Message: "The CF index must be enabled for this command",
|
|
}
|
|
}
|
|
|
|
c := cmd.(*btcjson.GetCFilterCmd)
|
|
hash, err := chainhash.NewHashFromStr(c.Hash)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.Hash)
|
|
}
|
|
|
|
filterBytes, err := s.cfg.CfIndex.FilterByBlockHash(hash, c.FilterType)
|
|
if err != nil {
|
|
rpcsLog.Debugf("Could not find committed filter for %v: %v",
|
|
hash, err)
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCBlockNotFound,
|
|
Message: "Block not found",
|
|
}
|
|
}
|
|
|
|
rpcsLog.Debugf("Found committed filter for %v", hash)
|
|
return hex.EncodeToString(filterBytes), nil
|
|
}
|
|
|
|
// handleGetCFilterHeader implements the getcfilterheader command.
|
|
func handleGetCFilterHeader(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
if s.cfg.CfIndex == nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCNoCFIndex,
|
|
Message: "The CF index must be enabled for this command",
|
|
}
|
|
}
|
|
|
|
c := cmd.(*btcjson.GetCFilterHeaderCmd)
|
|
hash, err := chainhash.NewHashFromStr(c.Hash)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.Hash)
|
|
}
|
|
|
|
headerBytes, err := s.cfg.CfIndex.FilterHeaderByBlockHash(hash, c.FilterType)
|
|
if len(headerBytes) > 0 {
|
|
rpcsLog.Debugf("Found header of committed filter for %v", hash)
|
|
} else {
|
|
rpcsLog.Debugf("Could not find header of committed filter for %v: %v",
|
|
hash, err)
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCBlockNotFound,
|
|
Message: "Block not found",
|
|
}
|
|
}
|
|
|
|
hash.SetBytes(headerBytes)
|
|
return hash.String(), nil
|
|
}
|
|
|
|
// handleGetConnectionCount implements the getconnectioncount command.
|
|
func handleGetConnectionCount(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
return s.cfg.ConnMgr.ConnectedCount(), nil
|
|
}
|
|
|
|
// handleGetCurrentNet implements the getcurrentnet command.
|
|
func handleGetCurrentNet(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
return s.cfg.ChainParams.Net, nil
|
|
}
|
|
|
|
// handleGetDifficulty implements the getdifficulty command.
|
|
func handleGetDifficulty(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
return getDifficultyRatio(best.Bits, s.cfg.ChainParams), nil
|
|
}
|
|
|
|
// handleGetGenerate implements the getgenerate command.
|
|
func handleGetGenerate(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
return s.cfg.CPUMiner.IsMining(), nil
|
|
}
|
|
|
|
// handleGetHashesPerSec implements the gethashespersec command.
|
|
func handleGetHashesPerSec(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
return int64(s.cfg.CPUMiner.HashesPerSecond()), nil
|
|
}
|
|
|
|
// handleGetHeaders implements the getheaders command.
|
|
//
|
|
// NOTE: This is a btcsuite extension originally ported from
|
|
// github.com/decred/dcrd.
|
|
func handleGetHeaders(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetHeadersCmd)
|
|
|
|
// Fetch the requested headers from chain while respecting the provided
|
|
// block locators and stop hash.
|
|
blockLocators := make([]*chainhash.Hash, len(c.BlockLocators))
|
|
for i := range c.BlockLocators {
|
|
blockLocator, err := chainhash.NewHashFromStr(c.BlockLocators[i])
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.BlockLocators[i])
|
|
}
|
|
blockLocators[i] = blockLocator
|
|
}
|
|
var hashStop chainhash.Hash
|
|
if c.HashStop != "" {
|
|
err := chainhash.Decode(&hashStop, c.HashStop)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.HashStop)
|
|
}
|
|
}
|
|
headers := s.cfg.SyncMgr.LocateHeaders(blockLocators, &hashStop)
|
|
|
|
// Return the serialized block headers as hex-encoded strings.
|
|
hexBlockHeaders := make([]string, len(headers))
|
|
var buf bytes.Buffer
|
|
for i, h := range headers {
|
|
err := h.Serialize(&buf)
|
|
if err != nil {
|
|
return nil, internalRPCError(err.Error(),
|
|
"Failed to serialize block header")
|
|
}
|
|
hexBlockHeaders[i] = hex.EncodeToString(buf.Bytes())
|
|
buf.Reset()
|
|
}
|
|
return hexBlockHeaders, nil
|
|
}
|
|
|
|
// handleGetInfo implements the getinfo command. We only return the fields
|
|
// that are not related to wallet functionality.
|
|
func handleGetInfo(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
ret := &btcjson.InfoChainResult{
|
|
Version: int32(1000000*appMajor + 10000*appMinor + 100*appPatch),
|
|
ProtocolVersion: int32(maxProtocolVersion),
|
|
Blocks: best.Height,
|
|
TimeOffset: int64(s.cfg.TimeSource.Offset().Seconds()),
|
|
Connections: s.cfg.ConnMgr.ConnectedCount(),
|
|
Proxy: cfg.Proxy,
|
|
Difficulty: getDifficultyRatio(best.Bits, s.cfg.ChainParams),
|
|
TestNet: cfg.TestNet3,
|
|
RelayFee: cfg.minRelayTxFee.ToBTC(),
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
// handleGetMempoolInfo implements the getmempoolinfo command.
|
|
func handleGetMempoolInfo(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
mempoolTxns := s.cfg.TxMemPool.TxDescs()
|
|
|
|
var numBytes int64
|
|
for _, txD := range mempoolTxns {
|
|
numBytes += int64(txD.Tx.MsgTx().SerializeSize())
|
|
}
|
|
|
|
ret := &btcjson.GetMempoolInfoResult{
|
|
Size: int64(len(mempoolTxns)),
|
|
Bytes: numBytes,
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
// handleGetMiningInfo implements the getmininginfo command. We only return the
|
|
// fields that are not related to wallet functionality.
|
|
func handleGetMiningInfo(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Create a default getnetworkhashps command to use defaults and make
|
|
// use of the existing getnetworkhashps handler.
|
|
gnhpsCmd := btcjson.NewGetNetworkHashPSCmd(nil, nil)
|
|
networkHashesPerSecIface, err := handleGetNetworkHashPS(s, gnhpsCmd,
|
|
closeChan)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
networkHashesPerSec, ok := networkHashesPerSecIface.(int64)
|
|
if !ok {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: "networkHashesPerSec is not an int64",
|
|
}
|
|
}
|
|
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
result := btcjson.GetMiningInfoResult{
|
|
Blocks: int64(best.Height),
|
|
CurrentBlockSize: best.BlockSize,
|
|
CurrentBlockWeight: best.BlockWeight,
|
|
CurrentBlockTx: best.NumTxns,
|
|
Difficulty: getDifficultyRatio(best.Bits, s.cfg.ChainParams),
|
|
Generate: s.cfg.CPUMiner.IsMining(),
|
|
GenProcLimit: s.cfg.CPUMiner.NumWorkers(),
|
|
HashesPerSec: int64(s.cfg.CPUMiner.HashesPerSecond()),
|
|
NetworkHashPS: networkHashesPerSec,
|
|
PooledTx: uint64(s.cfg.TxMemPool.Count()),
|
|
TestNet: cfg.TestNet3,
|
|
}
|
|
return &result, nil
|
|
}
|
|
|
|
// handleGetNetTotals implements the getnettotals command.
|
|
func handleGetNetTotals(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
totalBytesRecv, totalBytesSent := s.cfg.ConnMgr.NetTotals()
|
|
reply := &btcjson.GetNetTotalsResult{
|
|
TotalBytesRecv: totalBytesRecv,
|
|
TotalBytesSent: totalBytesSent,
|
|
TimeMillis: time.Now().UTC().UnixNano() / int64(time.Millisecond),
|
|
}
|
|
return reply, nil
|
|
}
|
|
|
|
// handleGetNetworkHashPS implements the getnetworkhashps command.
|
|
func handleGetNetworkHashPS(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Note: All valid error return paths should return an int64.
|
|
// Literal zeros are inferred as int, and won't coerce to int64
|
|
// because the return value is an interface{}.
|
|
|
|
c := cmd.(*btcjson.GetNetworkHashPSCmd)
|
|
|
|
// When the passed height is too high or zero, just return 0 now
|
|
// since we can't reasonably calculate the number of network hashes
|
|
// per second from invalid values. When it's negative, use the current
|
|
// best block height.
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
endHeight := int32(-1)
|
|
if c.Height != nil {
|
|
endHeight = int32(*c.Height)
|
|
}
|
|
if endHeight > best.Height || endHeight == 0 {
|
|
return int64(0), nil
|
|
}
|
|
if endHeight < 0 {
|
|
endHeight = best.Height
|
|
}
|
|
|
|
// Calculate the number of blocks per retarget interval based on the
|
|
// chain parameters.
|
|
blocksPerRetarget := int32(s.cfg.ChainParams.TargetTimespan /
|
|
s.cfg.ChainParams.TargetTimePerBlock)
|
|
|
|
// Calculate the starting block height based on the passed number of
|
|
// blocks. When the passed value is negative, use the last block the
|
|
// difficulty changed as the starting height. Also make sure the
|
|
// starting height is not before the beginning of the chain.
|
|
numBlocks := int32(120)
|
|
if c.Blocks != nil {
|
|
numBlocks = int32(*c.Blocks)
|
|
}
|
|
var startHeight int32
|
|
if numBlocks <= 0 {
|
|
startHeight = endHeight - ((endHeight % blocksPerRetarget) + 1)
|
|
} else {
|
|
startHeight = endHeight - numBlocks
|
|
}
|
|
if startHeight < 0 {
|
|
startHeight = 0
|
|
}
|
|
rpcsLog.Debugf("Calculating network hashes per second from %d to %d",
|
|
startHeight, endHeight)
|
|
|
|
// Find the min and max block timestamps as well as calculate the total
|
|
// amount of work that happened between the start and end blocks.
|
|
var minTimestamp, maxTimestamp time.Time
|
|
totalWork := big.NewInt(0)
|
|
for curHeight := startHeight; curHeight <= endHeight; curHeight++ {
|
|
hash, err := s.cfg.Chain.BlockHashByHeight(curHeight)
|
|
if err != nil {
|
|
context := "Failed to fetch block hash"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Fetch the header from chain.
|
|
header, err := s.cfg.Chain.HeaderByHash(hash)
|
|
if err != nil {
|
|
context := "Failed to fetch block header"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
if curHeight == startHeight {
|
|
minTimestamp = header.Timestamp
|
|
maxTimestamp = minTimestamp
|
|
} else {
|
|
totalWork.Add(totalWork, blockchain.CalcWork(header.Bits))
|
|
|
|
if minTimestamp.After(header.Timestamp) {
|
|
minTimestamp = header.Timestamp
|
|
}
|
|
if maxTimestamp.Before(header.Timestamp) {
|
|
maxTimestamp = header.Timestamp
|
|
}
|
|
}
|
|
}
|
|
|
|
// Calculate the difference in seconds between the min and max block
|
|
// timestamps and avoid division by zero in the case where there is no
|
|
// time difference.
|
|
timeDiff := int64(maxTimestamp.Sub(minTimestamp) / time.Second)
|
|
if timeDiff == 0 {
|
|
return int64(0), nil
|
|
}
|
|
|
|
hashesPerSec := new(big.Int).Div(totalWork, big.NewInt(timeDiff))
|
|
return hashesPerSec.Int64(), nil
|
|
}
|
|
|
|
// handleGetPeerInfo implements the getpeerinfo command.
|
|
func handleGetPeerInfo(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
peers := s.cfg.ConnMgr.ConnectedPeers()
|
|
syncPeerID := s.cfg.SyncMgr.SyncPeerID()
|
|
infos := make([]*btcjson.GetPeerInfoResult, 0, len(peers))
|
|
for _, p := range peers {
|
|
statsSnap := p.ToPeer().StatsSnapshot()
|
|
info := &btcjson.GetPeerInfoResult{
|
|
ID: statsSnap.ID,
|
|
Addr: statsSnap.Addr,
|
|
AddrLocal: p.ToPeer().LocalAddr().String(),
|
|
Services: fmt.Sprintf("%08d", uint64(statsSnap.Services)),
|
|
RelayTxes: !p.IsTxRelayDisabled(),
|
|
LastSend: statsSnap.LastSend.Unix(),
|
|
LastRecv: statsSnap.LastRecv.Unix(),
|
|
BytesSent: statsSnap.BytesSent,
|
|
BytesRecv: statsSnap.BytesRecv,
|
|
ConnTime: statsSnap.ConnTime.Unix(),
|
|
PingTime: float64(statsSnap.LastPingMicros),
|
|
TimeOffset: statsSnap.TimeOffset,
|
|
Version: statsSnap.Version,
|
|
SubVer: statsSnap.UserAgent,
|
|
Inbound: statsSnap.Inbound,
|
|
StartingHeight: statsSnap.StartingHeight,
|
|
CurrentHeight: statsSnap.LastBlock,
|
|
BanScore: int32(p.BanScore()),
|
|
FeeFilter: p.FeeFilter(),
|
|
SyncNode: statsSnap.ID == syncPeerID,
|
|
}
|
|
if p.ToPeer().LastPingNonce() != 0 {
|
|
wait := float64(time.Since(statsSnap.LastPingTime).Nanoseconds())
|
|
// We actually want microseconds.
|
|
info.PingWait = wait / 1000
|
|
}
|
|
infos = append(infos, info)
|
|
}
|
|
return infos, nil
|
|
}
|
|
|
|
// handleGetRawMempool implements the getrawmempool command.
|
|
func handleGetRawMempool(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetRawMempoolCmd)
|
|
mp := s.cfg.TxMemPool
|
|
|
|
if c.Verbose != nil && *c.Verbose {
|
|
return mp.RawMempoolVerbose(), nil
|
|
}
|
|
|
|
// The response is simply an array of the transaction hashes if the
|
|
// verbose flag is not set.
|
|
descs := mp.TxDescs()
|
|
hashStrings := make([]string, len(descs))
|
|
for i := range hashStrings {
|
|
hashStrings[i] = descs[i].Tx.Hash().String()
|
|
}
|
|
|
|
return hashStrings, nil
|
|
}
|
|
|
|
// handleGetRawTransaction implements the getrawtransaction command.
|
|
func handleGetRawTransaction(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetRawTransactionCmd)
|
|
|
|
// Convert the provided transaction hash hex to a Hash.
|
|
txHash, err := chainhash.NewHashFromStr(c.Txid)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.Txid)
|
|
}
|
|
|
|
verbose := false
|
|
if c.Verbose != nil {
|
|
verbose = *c.Verbose != 0
|
|
}
|
|
|
|
// Try to fetch the transaction from the memory pool and if that fails,
|
|
// try the block database.
|
|
var mtx *wire.MsgTx
|
|
var blkHash *chainhash.Hash
|
|
var blkHeight int32
|
|
tx, err := s.cfg.TxMemPool.FetchTransaction(txHash)
|
|
if err != nil {
|
|
if s.cfg.TxIndex == nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCNoTxInfo,
|
|
Message: "The transaction index must be " +
|
|
"enabled to query the blockchain " +
|
|
"(specify --txindex)",
|
|
}
|
|
}
|
|
|
|
// Look up the location of the transaction.
|
|
blockRegion, err := s.cfg.TxIndex.TxBlockRegion(txHash)
|
|
if err != nil {
|
|
context := "Failed to retrieve transaction location"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
if blockRegion == nil {
|
|
return nil, rpcNoTxInfoError(txHash)
|
|
}
|
|
|
|
// Load the raw transaction bytes from the database.
|
|
var txBytes []byte
|
|
err = s.cfg.DB.View(func(dbTx database.Tx) error {
|
|
var err error
|
|
txBytes, err = dbTx.FetchBlockRegion(blockRegion)
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return nil, rpcNoTxInfoError(txHash)
|
|
}
|
|
|
|
// When the verbose flag isn't set, simply return the serialized
|
|
// transaction as a hex-encoded string. This is done here to
|
|
// avoid deserializing it only to reserialize it again later.
|
|
if !verbose {
|
|
return hex.EncodeToString(txBytes), nil
|
|
}
|
|
|
|
// Grab the block height.
|
|
blkHash = blockRegion.Hash
|
|
blkHeight, err = s.cfg.Chain.BlockHeightByHash(blkHash)
|
|
if err != nil {
|
|
context := "Failed to retrieve block height"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Deserialize the transaction
|
|
var msgTx wire.MsgTx
|
|
err = msgTx.Deserialize(bytes.NewReader(txBytes))
|
|
if err != nil {
|
|
context := "Failed to deserialize transaction"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
mtx = &msgTx
|
|
} else {
|
|
// When the verbose flag isn't set, simply return the
|
|
// network-serialized transaction as a hex-encoded string.
|
|
if !verbose {
|
|
// Note that this is intentionally not directly
|
|
// returning because the first return value is a
|
|
// string and it would result in returning an empty
|
|
// string to the client instead of nothing (nil) in the
|
|
// case of an error.
|
|
mtxHex, err := messageToHex(tx.MsgTx())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return mtxHex, nil
|
|
}
|
|
|
|
mtx = tx.MsgTx()
|
|
}
|
|
|
|
// The verbose flag is set, so generate the JSON object and return it.
|
|
var blkHeader *wire.BlockHeader
|
|
var blkHashStr string
|
|
var chainHeight int32
|
|
if blkHash != nil {
|
|
// Fetch the header from chain.
|
|
header, err := s.cfg.Chain.HeaderByHash(blkHash)
|
|
if err != nil {
|
|
context := "Failed to fetch block header"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
blkHeader = &header
|
|
blkHashStr = blkHash.String()
|
|
chainHeight = s.cfg.Chain.BestSnapshot().Height
|
|
}
|
|
|
|
rawTxn, err := createTxRawResult(s.cfg.ChainParams, mtx, txHash.String(),
|
|
blkHeader, blkHashStr, blkHeight, chainHeight)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return *rawTxn, nil
|
|
}
|
|
|
|
// handleGetTxOut handles gettxout commands.
|
|
func handleGetTxOut(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.GetTxOutCmd)
|
|
|
|
// Convert the provided transaction hash hex to a Hash.
|
|
txHash, err := chainhash.NewHashFromStr(c.Txid)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(c.Txid)
|
|
}
|
|
|
|
// If requested and the tx is available in the mempool try to fetch it
|
|
// from there, otherwise attempt to fetch from the block database.
|
|
var bestBlockHash string
|
|
var confirmations int32
|
|
var value int64
|
|
var pkScript []byte
|
|
var isCoinbase bool
|
|
includeMempool := true
|
|
if c.IncludeMempool != nil {
|
|
includeMempool = *c.IncludeMempool
|
|
}
|
|
// TODO: This is racy. It should attempt to fetch it directly and check
|
|
// the error.
|
|
if includeMempool && s.cfg.TxMemPool.HaveTransaction(txHash) {
|
|
tx, err := s.cfg.TxMemPool.FetchTransaction(txHash)
|
|
if err != nil {
|
|
return nil, rpcNoTxInfoError(txHash)
|
|
}
|
|
|
|
mtx := tx.MsgTx()
|
|
if c.Vout > uint32(len(mtx.TxOut)-1) {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidTxVout,
|
|
Message: "Output index number (vout) does not " +
|
|
"exist for transaction.",
|
|
}
|
|
}
|
|
|
|
txOut := mtx.TxOut[c.Vout]
|
|
if txOut == nil {
|
|
errStr := fmt.Sprintf("Output index: %d for txid: %s "+
|
|
"does not exist", c.Vout, txHash)
|
|
return nil, internalRPCError(errStr, "")
|
|
}
|
|
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
bestBlockHash = best.Hash.String()
|
|
confirmations = 0
|
|
value = txOut.Value
|
|
pkScript = txOut.PkScript
|
|
isCoinbase = blockchain.IsCoinBaseTx(mtx)
|
|
} else {
|
|
out := wire.OutPoint{Hash: *txHash, Index: c.Vout}
|
|
entry, err := s.cfg.Chain.FetchUtxoEntry(out)
|
|
if err != nil {
|
|
return nil, rpcNoTxInfoError(txHash)
|
|
}
|
|
|
|
// To match the behavior of the reference client, return nil
|
|
// (JSON null) if the transaction output is spent by another
|
|
// transaction already in the main chain. Mined transactions
|
|
// that are spent by a mempool transaction are not affected by
|
|
// this.
|
|
if entry == nil || entry.IsSpent() {
|
|
return nil, nil
|
|
}
|
|
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
bestBlockHash = best.Hash.String()
|
|
confirmations = 1 + best.Height - entry.BlockHeight()
|
|
value = entry.Amount()
|
|
pkScript = entry.PkScript()
|
|
isCoinbase = entry.IsCoinBase()
|
|
}
|
|
|
|
// Disassemble script into single line printable format.
|
|
// The disassembled string will contain [error] inline if the script
|
|
// doesn't fully parse, so ignore the error here.
|
|
disbuf, _ := txscript.DisasmString(pkScript)
|
|
|
|
// Get further info about the script.
|
|
// Ignore the error here since an error means the script couldn't parse
|
|
// and there is no additional information about it anyways.
|
|
scriptClass, addrs, reqSigs, _ := txscript.ExtractPkScriptAddrs(pkScript,
|
|
s.cfg.ChainParams)
|
|
addresses := make([]string, len(addrs))
|
|
for i, addr := range addrs {
|
|
addresses[i] = addr.EncodeAddress()
|
|
}
|
|
|
|
txOutReply := &btcjson.GetTxOutResult{
|
|
BestBlock: bestBlockHash,
|
|
Confirmations: int64(confirmations),
|
|
Value: btcutil.Amount(value).ToBTC(),
|
|
ScriptPubKey: btcjson.ScriptPubKeyResult{
|
|
Asm: disbuf,
|
|
Hex: hex.EncodeToString(pkScript),
|
|
ReqSigs: int32(reqSigs),
|
|
Type: scriptClass.String(),
|
|
Addresses: addresses,
|
|
},
|
|
Coinbase: isCoinbase,
|
|
}
|
|
return txOutReply, nil
|
|
}
|
|
|
|
// handleHelp implements the help command.
|
|
func handleHelp(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.HelpCmd)
|
|
|
|
// Provide a usage overview of all commands when no specific command
|
|
// was specified.
|
|
var command string
|
|
if c.Command != nil {
|
|
command = *c.Command
|
|
}
|
|
if command == "" {
|
|
usage, err := s.helpCacher.rpcUsage(false)
|
|
if err != nil {
|
|
context := "Failed to generate RPC usage"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
return usage, nil
|
|
}
|
|
|
|
// Check that the command asked for is supported and implemented. Only
|
|
// search the main list of handlers since help should not be provided
|
|
// for commands that are unimplemented or related to wallet
|
|
// functionality.
|
|
if _, ok := rpcHandlers[command]; !ok {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidParameter,
|
|
Message: "Unknown command: " + command,
|
|
}
|
|
}
|
|
|
|
// Get the help for the command.
|
|
help, err := s.helpCacher.rpcMethodHelp(command)
|
|
if err != nil {
|
|
context := "Failed to generate help"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
return help, nil
|
|
}
|
|
|
|
// handlePing implements the ping command.
|
|
func handlePing(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Ask server to ping \o_
|
|
nonce, err := wire.RandomUint64()
|
|
if err != nil {
|
|
return nil, internalRPCError("Not sending ping - failed to "+
|
|
"generate nonce: "+err.Error(), "")
|
|
}
|
|
s.cfg.ConnMgr.BroadcastMessage(wire.NewMsgPing(nonce))
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
// retrievedTx represents a transaction that was either loaded from the
|
|
// transaction memory pool or from the database. When a transaction is loaded
|
|
// from the database, it is loaded with the raw serialized bytes while the
|
|
// mempool has the fully deserialized structure. This structure therefore will
|
|
// have one of the two fields set depending on where is was retrieved from.
|
|
// This is mainly done for efficiency to avoid extra serialization steps when
|
|
// possible.
|
|
type retrievedTx struct {
|
|
txBytes []byte
|
|
blkHash *chainhash.Hash // Only set when transaction is in a block.
|
|
tx *btcutil.Tx
|
|
}
|
|
|
|
// fetchInputTxos fetches the outpoints from all transactions referenced by the
|
|
// inputs to the passed transaction by checking the transaction mempool first
|
|
// then the transaction index for those already mined into blocks.
|
|
func fetchInputTxos(s *rpcServer, tx *wire.MsgTx) (map[wire.OutPoint]wire.TxOut, error) {
|
|
mp := s.cfg.TxMemPool
|
|
originOutputs := make(map[wire.OutPoint]wire.TxOut)
|
|
for txInIndex, txIn := range tx.TxIn {
|
|
// Attempt to fetch and use the referenced transaction from the
|
|
// memory pool.
|
|
origin := &txIn.PreviousOutPoint
|
|
originTx, err := mp.FetchTransaction(&origin.Hash)
|
|
if err == nil {
|
|
txOuts := originTx.MsgTx().TxOut
|
|
if origin.Index >= uint32(len(txOuts)) {
|
|
errStr := fmt.Sprintf("unable to find output "+
|
|
"%v referenced from transaction %s:%d",
|
|
origin, tx.TxHash(), txInIndex)
|
|
return nil, internalRPCError(errStr, "")
|
|
}
|
|
|
|
originOutputs[*origin] = *txOuts[origin.Index]
|
|
continue
|
|
}
|
|
|
|
// Look up the location of the transaction.
|
|
blockRegion, err := s.cfg.TxIndex.TxBlockRegion(&origin.Hash)
|
|
if err != nil {
|
|
context := "Failed to retrieve transaction location"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
if blockRegion == nil {
|
|
return nil, rpcNoTxInfoError(&origin.Hash)
|
|
}
|
|
|
|
// Load the raw transaction bytes from the database.
|
|
var txBytes []byte
|
|
err = s.cfg.DB.View(func(dbTx database.Tx) error {
|
|
var err error
|
|
txBytes, err = dbTx.FetchBlockRegion(blockRegion)
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return nil, rpcNoTxInfoError(&origin.Hash)
|
|
}
|
|
|
|
// Deserialize the transaction
|
|
var msgTx wire.MsgTx
|
|
err = msgTx.Deserialize(bytes.NewReader(txBytes))
|
|
if err != nil {
|
|
context := "Failed to deserialize transaction"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
// Add the referenced output to the map.
|
|
if origin.Index >= uint32(len(msgTx.TxOut)) {
|
|
errStr := fmt.Sprintf("unable to find output %v "+
|
|
"referenced from transaction %s:%d", origin,
|
|
tx.TxHash(), txInIndex)
|
|
return nil, internalRPCError(errStr, "")
|
|
}
|
|
originOutputs[*origin] = *msgTx.TxOut[origin.Index]
|
|
}
|
|
|
|
return originOutputs, nil
|
|
}
|
|
|
|
// createVinListPrevOut returns a slice of JSON objects for the inputs of the
|
|
// passed transaction.
|
|
func createVinListPrevOut(s *rpcServer, mtx *wire.MsgTx, chainParams *chaincfg.Params, vinExtra bool, filterAddrMap map[string]struct{}) ([]btcjson.VinPrevOut, error) {
|
|
// Coinbase transactions only have a single txin by definition.
|
|
if blockchain.IsCoinBaseTx(mtx) {
|
|
// Only include the transaction if the filter map is empty
|
|
// because a coinbase input has no addresses and so would never
|
|
// match a non-empty filter.
|
|
if len(filterAddrMap) != 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
txIn := mtx.TxIn[0]
|
|
vinList := make([]btcjson.VinPrevOut, 1)
|
|
vinList[0].Coinbase = hex.EncodeToString(txIn.SignatureScript)
|
|
vinList[0].Sequence = txIn.Sequence
|
|
return vinList, nil
|
|
}
|
|
|
|
// Use a dynamically sized list to accommodate the address filter.
|
|
vinList := make([]btcjson.VinPrevOut, 0, len(mtx.TxIn))
|
|
|
|
// Lookup all of the referenced transaction outputs needed to populate
|
|
// the previous output information if requested.
|
|
var originOutputs map[wire.OutPoint]wire.TxOut
|
|
if vinExtra || len(filterAddrMap) > 0 {
|
|
var err error
|
|
originOutputs, err = fetchInputTxos(s, mtx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
for _, txIn := range mtx.TxIn {
|
|
// The disassembled string will contain [error] inline
|
|
// if the script doesn't fully parse, so ignore the
|
|
// error here.
|
|
disbuf, _ := txscript.DisasmString(txIn.SignatureScript)
|
|
|
|
// Create the basic input entry without the additional optional
|
|
// previous output details which will be added later if
|
|
// requested and available.
|
|
prevOut := &txIn.PreviousOutPoint
|
|
vinEntry := btcjson.VinPrevOut{
|
|
Txid: prevOut.Hash.String(),
|
|
Vout: prevOut.Index,
|
|
Sequence: txIn.Sequence,
|
|
ScriptSig: &btcjson.ScriptSig{
|
|
Asm: disbuf,
|
|
Hex: hex.EncodeToString(txIn.SignatureScript),
|
|
},
|
|
}
|
|
|
|
if len(txIn.Witness) != 0 {
|
|
vinEntry.Witness = witnessToHex(txIn.Witness)
|
|
}
|
|
|
|
// Add the entry to the list now if it already passed the filter
|
|
// since the previous output might not be available.
|
|
passesFilter := len(filterAddrMap) == 0
|
|
if passesFilter {
|
|
vinList = append(vinList, vinEntry)
|
|
}
|
|
|
|
// Only populate previous output information if requested and
|
|
// available.
|
|
if len(originOutputs) == 0 {
|
|
continue
|
|
}
|
|
originTxOut, ok := originOutputs[*prevOut]
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
// Ignore the error here since an error means the script
|
|
// couldn't parse and there is no additional information about
|
|
// it anyways.
|
|
_, addrs, _, _ := txscript.ExtractPkScriptAddrs(
|
|
originTxOut.PkScript, chainParams)
|
|
|
|
// Encode the addresses while checking if the address passes the
|
|
// filter when needed.
|
|
encodedAddrs := make([]string, len(addrs))
|
|
for j, addr := range addrs {
|
|
encodedAddr := addr.EncodeAddress()
|
|
encodedAddrs[j] = encodedAddr
|
|
|
|
// No need to check the map again if the filter already
|
|
// passes.
|
|
if passesFilter {
|
|
continue
|
|
}
|
|
if _, exists := filterAddrMap[encodedAddr]; exists {
|
|
passesFilter = true
|
|
}
|
|
}
|
|
|
|
// Ignore the entry if it doesn't pass the filter.
|
|
if !passesFilter {
|
|
continue
|
|
}
|
|
|
|
// Add entry to the list if it wasn't already done above.
|
|
if len(filterAddrMap) != 0 {
|
|
vinList = append(vinList, vinEntry)
|
|
}
|
|
|
|
// Update the entry with previous output information if
|
|
// requested.
|
|
if vinExtra {
|
|
vinListEntry := &vinList[len(vinList)-1]
|
|
vinListEntry.PrevOut = &btcjson.PrevOut{
|
|
Addresses: encodedAddrs,
|
|
Value: btcutil.Amount(originTxOut.Value).ToBTC(),
|
|
}
|
|
}
|
|
}
|
|
|
|
return vinList, nil
|
|
}
|
|
|
|
// fetchMempoolTxnsForAddress queries the address index for all unconfirmed
|
|
// transactions that involve the provided address. The results will be limited
|
|
// by the number to skip and the number requested.
|
|
func fetchMempoolTxnsForAddress(s *rpcServer, addr btcutil.Address, numToSkip, numRequested uint32) ([]*btcutil.Tx, uint32) {
|
|
// There are no entries to return when there are less available than the
|
|
// number being skipped.
|
|
mpTxns := s.cfg.AddrIndex.UnconfirmedTxnsForAddress(addr)
|
|
numAvailable := uint32(len(mpTxns))
|
|
if numToSkip > numAvailable {
|
|
return nil, numAvailable
|
|
}
|
|
|
|
// Filter the available entries based on the number to skip and number
|
|
// requested.
|
|
rangeEnd := numToSkip + numRequested
|
|
if rangeEnd > numAvailable {
|
|
rangeEnd = numAvailable
|
|
}
|
|
return mpTxns[numToSkip:rangeEnd], numToSkip
|
|
}
|
|
|
|
// handleSearchRawTransactions implements the searchrawtransactions command.
|
|
func handleSearchRawTransactions(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
// Respond with an error if the address index is not enabled.
|
|
addrIndex := s.cfg.AddrIndex
|
|
if addrIndex == nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCMisc,
|
|
Message: "Address index must be enabled (--addrindex)",
|
|
}
|
|
}
|
|
|
|
// Override the flag for including extra previous output information in
|
|
// each input if needed.
|
|
c := cmd.(*btcjson.SearchRawTransactionsCmd)
|
|
vinExtra := false
|
|
if c.VinExtra != nil {
|
|
vinExtra = *c.VinExtra != 0
|
|
}
|
|
|
|
// Including the extra previous output information requires the
|
|
// transaction index. Currently the address index relies on the
|
|
// transaction index, so this check is redundant, but it's better to be
|
|
// safe in case the address index is ever changed to not rely on it.
|
|
if vinExtra && s.cfg.TxIndex == nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCMisc,
|
|
Message: "Transaction index must be enabled (--txindex)",
|
|
}
|
|
}
|
|
|
|
// Attempt to decode the supplied address.
|
|
params := s.cfg.ChainParams
|
|
addr, err := btcutil.DecodeAddress(c.Address, params)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidAddressOrKey,
|
|
Message: "Invalid address or key: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Override the default number of requested entries if needed. Also,
|
|
// just return now if the number of requested entries is zero to avoid
|
|
// extra work.
|
|
numRequested := 100
|
|
if c.Count != nil {
|
|
numRequested = *c.Count
|
|
if numRequested < 0 {
|
|
numRequested = 1
|
|
}
|
|
}
|
|
if numRequested == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
// Override the default number of entries to skip if needed.
|
|
var numToSkip int
|
|
if c.Skip != nil {
|
|
numToSkip = *c.Skip
|
|
if numToSkip < 0 {
|
|
numToSkip = 0
|
|
}
|
|
}
|
|
|
|
// Override the reverse flag if needed.
|
|
var reverse bool
|
|
if c.Reverse != nil {
|
|
reverse = *c.Reverse
|
|
}
|
|
|
|
// Add transactions from mempool first if client asked for reverse
|
|
// order. Otherwise, they will be added last (as needed depending on
|
|
// the requested counts).
|
|
//
|
|
// NOTE: This code doesn't sort by dependency. This might be something
|
|
// to do in the future for the client's convenience, or leave it to the
|
|
// client.
|
|
numSkipped := uint32(0)
|
|
addressTxns := make([]retrievedTx, 0, numRequested)
|
|
if reverse {
|
|
// Transactions in the mempool are not in a block header yet,
|
|
// so the block header field in the retieved transaction struct
|
|
// is left nil.
|
|
mpTxns, mpSkipped := fetchMempoolTxnsForAddress(s, addr,
|
|
uint32(numToSkip), uint32(numRequested))
|
|
numSkipped += mpSkipped
|
|
for _, tx := range mpTxns {
|
|
addressTxns = append(addressTxns, retrievedTx{tx: tx})
|
|
}
|
|
}
|
|
|
|
// Fetch transactions from the database in the desired order if more are
|
|
// needed.
|
|
if len(addressTxns) < numRequested {
|
|
err = s.cfg.DB.View(func(dbTx database.Tx) error {
|
|
regions, dbSkipped, err := addrIndex.TxRegionsForAddress(
|
|
dbTx, addr, uint32(numToSkip)-numSkipped,
|
|
uint32(numRequested-len(addressTxns)), reverse)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Load the raw transaction bytes from the database.
|
|
serializedTxns, err := dbTx.FetchBlockRegions(regions)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Add the transaction and the hash of the block it is
|
|
// contained in to the list. Note that the transaction
|
|
// is left serialized here since the caller might have
|
|
// requested non-verbose output and hence there would be
|
|
// no point in deserializing it just to reserialize it
|
|
// later.
|
|
for i, serializedTx := range serializedTxns {
|
|
addressTxns = append(addressTxns, retrievedTx{
|
|
txBytes: serializedTx,
|
|
blkHash: regions[i].Hash,
|
|
})
|
|
}
|
|
numSkipped += dbSkipped
|
|
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
context := "Failed to load address index entries"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
}
|
|
|
|
// Add transactions from mempool last if client did not request reverse
|
|
// order and the number of results is still under the number requested.
|
|
if !reverse && len(addressTxns) < numRequested {
|
|
// Transactions in the mempool are not in a block header yet,
|
|
// so the block header field in the retieved transaction struct
|
|
// is left nil.
|
|
mpTxns, mpSkipped := fetchMempoolTxnsForAddress(s, addr,
|
|
uint32(numToSkip)-numSkipped, uint32(numRequested-
|
|
len(addressTxns)))
|
|
numSkipped += mpSkipped
|
|
for _, tx := range mpTxns {
|
|
addressTxns = append(addressTxns, retrievedTx{tx: tx})
|
|
}
|
|
}
|
|
|
|
// Address has never been used if neither source yielded any results.
|
|
if len(addressTxns) == 0 {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCNoTxInfo,
|
|
Message: "No information available about address",
|
|
}
|
|
}
|
|
|
|
// Serialize all of the transactions to hex.
|
|
hexTxns := make([]string, len(addressTxns))
|
|
for i := range addressTxns {
|
|
// Simply encode the raw bytes to hex when the retrieved
|
|
// transaction is already in serialized form.
|
|
rtx := &addressTxns[i]
|
|
if rtx.txBytes != nil {
|
|
hexTxns[i] = hex.EncodeToString(rtx.txBytes)
|
|
continue
|
|
}
|
|
|
|
// Serialize the transaction first and convert to hex when the
|
|
// retrieved transaction is the deserialized structure.
|
|
hexTxns[i], err = messageToHex(rtx.tx.MsgTx())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// When not in verbose mode, simply return a list of serialized txns.
|
|
if c.Verbose != nil && *c.Verbose == 0 {
|
|
return hexTxns, nil
|
|
}
|
|
|
|
// Normalize the provided filter addresses (if any) to ensure there are
|
|
// no duplicates.
|
|
filterAddrMap := make(map[string]struct{})
|
|
if c.FilterAddrs != nil && len(*c.FilterAddrs) > 0 {
|
|
for _, addr := range *c.FilterAddrs {
|
|
filterAddrMap[addr] = struct{}{}
|
|
}
|
|
}
|
|
|
|
// The verbose flag is set, so generate the JSON object and return it.
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
srtList := make([]btcjson.SearchRawTransactionsResult, len(addressTxns))
|
|
for i := range addressTxns {
|
|
// The deserialized transaction is needed, so deserialize the
|
|
// retrieved transaction if it's in serialized form (which will
|
|
// be the case when it was lookup up from the database).
|
|
// Otherwise, use the existing deserialized transaction.
|
|
rtx := &addressTxns[i]
|
|
var mtx *wire.MsgTx
|
|
if rtx.tx == nil {
|
|
// Deserialize the transaction.
|
|
mtx = new(wire.MsgTx)
|
|
err := mtx.Deserialize(bytes.NewReader(rtx.txBytes))
|
|
if err != nil {
|
|
context := "Failed to deserialize transaction"
|
|
return nil, internalRPCError(err.Error(),
|
|
context)
|
|
}
|
|
} else {
|
|
mtx = rtx.tx.MsgTx()
|
|
}
|
|
|
|
result := &srtList[i]
|
|
result.Hex = hexTxns[i]
|
|
result.Txid = mtx.TxHash().String()
|
|
result.Vin, err = createVinListPrevOut(s, mtx, params, vinExtra,
|
|
filterAddrMap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result.Vout = createVoutList(mtx, params, filterAddrMap)
|
|
result.Version = mtx.Version
|
|
result.LockTime = mtx.LockTime
|
|
|
|
// Transactions grabbed from the mempool aren't yet in a block,
|
|
// so conditionally fetch block details here. This will be
|
|
// reflected in the final JSON output (mempool won't have
|
|
// confirmations or block information).
|
|
var blkHeader *wire.BlockHeader
|
|
var blkHashStr string
|
|
var blkHeight int32
|
|
if blkHash := rtx.blkHash; blkHash != nil {
|
|
// Fetch the header from chain.
|
|
header, err := s.cfg.Chain.HeaderByHash(blkHash)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCBlockNotFound,
|
|
Message: "Block not found",
|
|
}
|
|
}
|
|
|
|
// Get the block height from chain.
|
|
height, err := s.cfg.Chain.BlockHeightByHash(blkHash)
|
|
if err != nil {
|
|
context := "Failed to obtain block height"
|
|
return nil, internalRPCError(err.Error(), context)
|
|
}
|
|
|
|
blkHeader = &header
|
|
blkHashStr = blkHash.String()
|
|
blkHeight = height
|
|
}
|
|
|
|
// Add the block information to the result if there is any.
|
|
if blkHeader != nil {
|
|
// This is not a typo, they are identical in Bitcoin
|
|
// Core as well.
|
|
result.Time = blkHeader.Timestamp.Unix()
|
|
result.Blocktime = blkHeader.Timestamp.Unix()
|
|
result.BlockHash = blkHashStr
|
|
result.Confirmations = uint64(1 + best.Height - blkHeight)
|
|
}
|
|
}
|
|
|
|
return srtList, nil
|
|
}
|
|
|
|
// handleSendRawTransaction implements the sendrawtransaction command.
|
|
func handleSendRawTransaction(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.SendRawTransactionCmd)
|
|
// Deserialize and send off to tx relay
|
|
hexStr := c.HexTx
|
|
if len(hexStr)%2 != 0 {
|
|
hexStr = "0" + hexStr
|
|
}
|
|
serializedTx, err := hex.DecodeString(hexStr)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(hexStr)
|
|
}
|
|
var msgTx wire.MsgTx
|
|
err = msgTx.Deserialize(bytes.NewReader(serializedTx))
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDeserialization,
|
|
Message: "TX decode failed: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Use 0 for the tag to represent local node.
|
|
tx := btcutil.NewTx(&msgTx)
|
|
acceptedTxs, err := s.cfg.TxMemPool.ProcessTransaction(tx, false, false, 0)
|
|
if err != nil {
|
|
// When the error is a rule error, it means the transaction was
|
|
// simply rejected as opposed to something actually going wrong,
|
|
// so log it as such. Otherwise, something really did go wrong,
|
|
// so log it as an actual error. In both cases, a JSON-RPC
|
|
// error is returned to the client with the deserialization
|
|
// error code (to match bitcoind behavior).
|
|
if _, ok := err.(mempool.RuleError); ok {
|
|
rpcsLog.Debugf("Rejected transaction %v: %v", tx.Hash(),
|
|
err)
|
|
} else {
|
|
rpcsLog.Errorf("Failed to process transaction %v: %v",
|
|
tx.Hash(), err)
|
|
}
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDeserialization,
|
|
Message: "TX rejected: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// When the transaction was accepted it should be the first item in the
|
|
// returned array of accepted transactions. The only way this will not
|
|
// be true is if the API for ProcessTransaction changes and this code is
|
|
// not properly updated, but ensure the condition holds as a safeguard.
|
|
//
|
|
// Also, since an error is being returned to the caller, ensure the
|
|
// transaction is removed from the memory pool.
|
|
if len(acceptedTxs) == 0 || !acceptedTxs[0].Tx.Hash().IsEqual(tx.Hash()) {
|
|
s.cfg.TxMemPool.RemoveTransaction(tx, true)
|
|
|
|
errStr := fmt.Sprintf("transaction %v is not in accepted list",
|
|
tx.Hash())
|
|
return nil, internalRPCError(errStr, "")
|
|
}
|
|
|
|
// Generate and relay inventory vectors for all newly accepted
|
|
// transactions into the memory pool due to the original being
|
|
// accepted.
|
|
s.cfg.ConnMgr.RelayTransactions(acceptedTxs)
|
|
|
|
// Notify both websocket and getblocktemplate long poll clients of all
|
|
// newly accepted transactions.
|
|
s.NotifyNewTransactions(acceptedTxs)
|
|
|
|
// Keep track of all the sendrawtransaction request txns so that they
|
|
// can be rebroadcast if they don't make their way into a block.
|
|
txD := acceptedTxs[0]
|
|
iv := wire.NewInvVect(wire.InvTypeTx, txD.Tx.Hash())
|
|
s.cfg.ConnMgr.AddRebroadcastInventory(iv, txD)
|
|
|
|
return tx.Hash().String(), nil
|
|
}
|
|
|
|
// handleSetGenerate implements the setgenerate command.
|
|
func handleSetGenerate(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.SetGenerateCmd)
|
|
|
|
// Disable generation regardless of the provided generate flag if the
|
|
// maximum number of threads (goroutines for our purposes) is 0.
|
|
// Otherwise enable or disable it depending on the provided flag.
|
|
generate := c.Generate
|
|
genProcLimit := -1
|
|
if c.GenProcLimit != nil {
|
|
genProcLimit = *c.GenProcLimit
|
|
}
|
|
if genProcLimit == 0 {
|
|
generate = false
|
|
}
|
|
|
|
if !generate {
|
|
s.cfg.CPUMiner.Stop()
|
|
} else {
|
|
// Respond with an error if there are no addresses to pay the
|
|
// created blocks to.
|
|
if len(cfg.miningAddrs) == 0 {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInternal.Code,
|
|
Message: "No payment addresses specified " +
|
|
"via --miningaddr",
|
|
}
|
|
}
|
|
|
|
// It's safe to call start even if it's already started.
|
|
s.cfg.CPUMiner.SetNumWorkers(int32(genProcLimit))
|
|
s.cfg.CPUMiner.Start()
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
// handleStop implements the stop command.
|
|
func handleStop(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
select {
|
|
case s.requestProcessShutdown <- struct{}{}:
|
|
default:
|
|
}
|
|
return "btcd stopping.", nil
|
|
}
|
|
|
|
// handleSubmitBlock implements the submitblock command.
|
|
func handleSubmitBlock(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.SubmitBlockCmd)
|
|
|
|
// Deserialize the submitted block.
|
|
hexStr := c.HexBlock
|
|
if len(hexStr)%2 != 0 {
|
|
hexStr = "0" + c.HexBlock
|
|
}
|
|
serializedBlock, err := hex.DecodeString(hexStr)
|
|
if err != nil {
|
|
return nil, rpcDecodeHexError(hexStr)
|
|
}
|
|
|
|
block, err := btcutil.NewBlockFromBytes(serializedBlock)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCDeserialization,
|
|
Message: "Block decode failed: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Process this block using the same rules as blocks coming from other
|
|
// nodes. This will in turn relay it to the network like normal.
|
|
_, err = s.cfg.SyncMgr.SubmitBlock(block, blockchain.BFNone)
|
|
if err != nil {
|
|
return fmt.Sprintf("rejected: %s", err.Error()), nil
|
|
}
|
|
|
|
rpcsLog.Infof("Accepted block %s via submitblock", block.Hash())
|
|
return nil, nil
|
|
}
|
|
|
|
// handleUptime implements the uptime command.
|
|
func handleUptime(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
return time.Now().Unix() - s.cfg.StartupTime, nil
|
|
}
|
|
|
|
// handleValidateAddress implements the validateaddress command.
|
|
func handleValidateAddress(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.ValidateAddressCmd)
|
|
|
|
result := btcjson.ValidateAddressChainResult{}
|
|
addr, err := btcutil.DecodeAddress(c.Address, s.cfg.ChainParams)
|
|
if err != nil {
|
|
// Return the default value (false) for IsValid.
|
|
return result, nil
|
|
}
|
|
|
|
result.Address = addr.EncodeAddress()
|
|
result.IsValid = true
|
|
|
|
return result, nil
|
|
}
|
|
|
|
func verifyChain(s *rpcServer, level, depth int32) error {
|
|
best := s.cfg.Chain.BestSnapshot()
|
|
finishHeight := best.Height - depth
|
|
if finishHeight < 0 {
|
|
finishHeight = 0
|
|
}
|
|
rpcsLog.Infof("Verifying chain for %d blocks at level %d",
|
|
best.Height-finishHeight, level)
|
|
|
|
for height := best.Height; height > finishHeight; height-- {
|
|
// Level 0 just looks up the block.
|
|
block, err := s.cfg.Chain.BlockByHeight(height)
|
|
if err != nil {
|
|
rpcsLog.Errorf("Verify is unable to fetch block at "+
|
|
"height %d: %v", height, err)
|
|
return err
|
|
}
|
|
|
|
// Level 1 does basic chain sanity checks.
|
|
if level > 0 {
|
|
err := blockchain.CheckBlockSanity(block,
|
|
s.cfg.ChainParams.PowLimit, s.cfg.TimeSource)
|
|
if err != nil {
|
|
rpcsLog.Errorf("Verify is unable to validate "+
|
|
"block at hash %v height %d: %v",
|
|
block.Hash(), height, err)
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
rpcsLog.Infof("Chain verify completed successfully")
|
|
|
|
return nil
|
|
}
|
|
|
|
// handleVerifyChain implements the verifychain command.
|
|
func handleVerifyChain(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.VerifyChainCmd)
|
|
|
|
var checkLevel, checkDepth int32
|
|
if c.CheckLevel != nil {
|
|
checkLevel = *c.CheckLevel
|
|
}
|
|
if c.CheckDepth != nil {
|
|
checkDepth = *c.CheckDepth
|
|
}
|
|
|
|
err := verifyChain(s, checkLevel, checkDepth)
|
|
return err == nil, nil
|
|
}
|
|
|
|
// handleVerifyMessage implements the verifymessage command.
|
|
func handleVerifyMessage(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
c := cmd.(*btcjson.VerifyMessageCmd)
|
|
|
|
// Decode the provided address.
|
|
params := s.cfg.ChainParams
|
|
addr, err := btcutil.DecodeAddress(c.Address, params)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidAddressOrKey,
|
|
Message: "Invalid address or key: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Only P2PKH addresses are valid for signing.
|
|
if _, ok := addr.(*btcutil.AddressPubKeyHash); !ok {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCType,
|
|
Message: "Address is not a pay-to-pubkey-hash address",
|
|
}
|
|
}
|
|
|
|
// Decode base64 signature.
|
|
sig, err := base64.StdEncoding.DecodeString(c.Signature)
|
|
if err != nil {
|
|
return nil, &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCParse.Code,
|
|
Message: "Malformed base64 encoding: " + err.Error(),
|
|
}
|
|
}
|
|
|
|
// Validate the signature - this just shows that it was valid at all.
|
|
// we will compare it with the key next.
|
|
var buf bytes.Buffer
|
|
wire.WriteVarString(&buf, 0, "Bitcoin Signed Message:\n")
|
|
wire.WriteVarString(&buf, 0, c.Message)
|
|
expectedMessageHash := chainhash.DoubleHashB(buf.Bytes())
|
|
pk, wasCompressed, err := btcec.RecoverCompact(btcec.S256(), sig,
|
|
expectedMessageHash)
|
|
if err != nil {
|
|
// Mirror Bitcoin Core behavior, which treats error in
|
|
// RecoverCompact as invalid signature.
|
|
return false, nil
|
|
}
|
|
|
|
// Reconstruct the pubkey hash.
|
|
var serializedPK []byte
|
|
if wasCompressed {
|
|
serializedPK = pk.SerializeCompressed()
|
|
} else {
|
|
serializedPK = pk.SerializeUncompressed()
|
|
}
|
|
address, err := btcutil.NewAddressPubKey(serializedPK, params)
|
|
if err != nil {
|
|
// Again mirror Bitcoin Core behavior, which treats error in public key
|
|
// reconstruction as invalid signature.
|
|
return false, nil
|
|
}
|
|
|
|
// Return boolean if addresses match.
|
|
return address.EncodeAddress() == c.Address, nil
|
|
}
|
|
|
|
// handleVersion implements the version command.
|
|
//
|
|
// NOTE: This is a btcsuite extension ported from github.com/decred/dcrd.
|
|
func handleVersion(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
|
|
result := map[string]btcjson.VersionResult{
|
|
"btcdjsonrpcapi": {
|
|
VersionString: jsonrpcSemverString,
|
|
Major: jsonrpcSemverMajor,
|
|
Minor: jsonrpcSemverMinor,
|
|
Patch: jsonrpcSemverPatch,
|
|
},
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
// rpcServer provides a concurrent safe RPC server to a chain server.
|
|
type rpcServer struct {
|
|
started int32
|
|
shutdown int32
|
|
cfg rpcserverConfig
|
|
authsha [sha256.Size]byte
|
|
limitauthsha [sha256.Size]byte
|
|
ntfnMgr *wsNotificationManager
|
|
numClients int32
|
|
statusLines map[int]string
|
|
statusLock sync.RWMutex
|
|
wg sync.WaitGroup
|
|
gbtWorkState *gbtWorkState
|
|
helpCacher *helpCacher
|
|
requestProcessShutdown chan struct{}
|
|
quit chan int
|
|
}
|
|
|
|
// httpStatusLine returns a response Status-Line (RFC 2616 Section 6.1)
|
|
// for the given request and response status code. This function was lifted and
|
|
// adapted from the standard library HTTP server code since it's not exported.
|
|
func (s *rpcServer) httpStatusLine(req *http.Request, code int) string {
|
|
// Fast path:
|
|
key := code
|
|
proto11 := req.ProtoAtLeast(1, 1)
|
|
if !proto11 {
|
|
key = -key
|
|
}
|
|
s.statusLock.RLock()
|
|
line, ok := s.statusLines[key]
|
|
s.statusLock.RUnlock()
|
|
if ok {
|
|
return line
|
|
}
|
|
|
|
// Slow path:
|
|
proto := "HTTP/1.0"
|
|
if proto11 {
|
|
proto = "HTTP/1.1"
|
|
}
|
|
codeStr := strconv.Itoa(code)
|
|
text := http.StatusText(code)
|
|
if text != "" {
|
|
line = proto + " " + codeStr + " " + text + "\r\n"
|
|
s.statusLock.Lock()
|
|
s.statusLines[key] = line
|
|
s.statusLock.Unlock()
|
|
} else {
|
|
text = "status code " + codeStr
|
|
line = proto + " " + codeStr + " " + text + "\r\n"
|
|
}
|
|
|
|
return line
|
|
}
|
|
|
|
// writeHTTPResponseHeaders writes the necessary response headers prior to
|
|
// writing an HTTP body given a request to use for protocol negotiation, headers
|
|
// to write, a status code, and a writer.
|
|
func (s *rpcServer) writeHTTPResponseHeaders(req *http.Request, headers http.Header, code int, w io.Writer) error {
|
|
_, err := io.WriteString(w, s.httpStatusLine(req, code))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = headers.Write(w)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = io.WriteString(w, "\r\n")
|
|
return err
|
|
}
|
|
|
|
// Stop is used by server.go to stop the rpc listener.
|
|
func (s *rpcServer) Stop() error {
|
|
if atomic.AddInt32(&s.shutdown, 1) != 1 {
|
|
rpcsLog.Infof("RPC server is already in the process of shutting down")
|
|
return nil
|
|
}
|
|
rpcsLog.Warnf("RPC server shutting down")
|
|
for _, listener := range s.cfg.Listeners {
|
|
err := listener.Close()
|
|
if err != nil {
|
|
rpcsLog.Errorf("Problem shutting down rpc: %v", err)
|
|
return err
|
|
}
|
|
}
|
|
s.ntfnMgr.Shutdown()
|
|
s.ntfnMgr.WaitForShutdown()
|
|
close(s.quit)
|
|
s.wg.Wait()
|
|
rpcsLog.Infof("RPC server shutdown complete")
|
|
return nil
|
|
}
|
|
|
|
// RequestedProcessShutdown returns a channel that is sent to when an authorized
|
|
// RPC client requests the process to shutdown. If the request can not be read
|
|
// immediately, it is dropped.
|
|
func (s *rpcServer) RequestedProcessShutdown() <-chan struct{} {
|
|
return s.requestProcessShutdown
|
|
}
|
|
|
|
// NotifyNewTransactions notifies both websocket and getblocktemplate long
|
|
// poll clients of the passed transactions. This function should be called
|
|
// whenever new transactions are added to the mempool.
|
|
func (s *rpcServer) NotifyNewTransactions(txns []*mempool.TxDesc) {
|
|
for _, txD := range txns {
|
|
// Notify websocket clients about mempool transactions.
|
|
s.ntfnMgr.NotifyMempoolTx(txD.Tx, true)
|
|
|
|
// Potentially notify any getblocktemplate long poll clients
|
|
// about stale block templates due to the new transaction.
|
|
s.gbtWorkState.NotifyMempoolTx(s.cfg.TxMemPool.LastUpdated())
|
|
}
|
|
}
|
|
|
|
// limitConnections responds with a 503 service unavailable and returns true if
|
|
// adding another client would exceed the maximum allow RPC clients.
|
|
//
|
|
// This function is safe for concurrent access.
|
|
func (s *rpcServer) limitConnections(w http.ResponseWriter, remoteAddr string) bool {
|
|
if int(atomic.LoadInt32(&s.numClients)+1) > cfg.RPCMaxClients {
|
|
rpcsLog.Infof("Max RPC clients exceeded [%d] - "+
|
|
"disconnecting client %s", cfg.RPCMaxClients,
|
|
remoteAddr)
|
|
http.Error(w, "503 Too busy. Try again later.",
|
|
http.StatusServiceUnavailable)
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// incrementClients adds one to the number of connected RPC clients. Note
|
|
// this only applies to standard clients. Websocket clients have their own
|
|
// limits and are tracked separately.
|
|
//
|
|
// This function is safe for concurrent access.
|
|
func (s *rpcServer) incrementClients() {
|
|
atomic.AddInt32(&s.numClients, 1)
|
|
}
|
|
|
|
// decrementClients subtracts one from the number of connected RPC clients.
|
|
// Note this only applies to standard clients. Websocket clients have their own
|
|
// limits and are tracked separately.
|
|
//
|
|
// This function is safe for concurrent access.
|
|
func (s *rpcServer) decrementClients() {
|
|
atomic.AddInt32(&s.numClients, -1)
|
|
}
|
|
|
|
// checkAuth checks the HTTP Basic authentication supplied by a wallet
|
|
// or RPC client in the HTTP request r. If the supplied authentication
|
|
// does not match the username and password expected, a non-nil error is
|
|
// returned.
|
|
//
|
|
// This check is time-constant.
|
|
//
|
|
// The first bool return value signifies auth success (true if successful) and
|
|
// the second bool return value specifies whether the user can change the state
|
|
// of the server (true) or whether the user is limited (false). The second is
|
|
// always false if the first is.
|
|
func (s *rpcServer) checkAuth(r *http.Request, require bool) (bool, bool, error) {
|
|
authhdr := r.Header["Authorization"]
|
|
if len(authhdr) <= 0 {
|
|
if require {
|
|
rpcsLog.Warnf("RPC authentication failure from %s",
|
|
r.RemoteAddr)
|
|
return false, false, errors.New("auth failure")
|
|
}
|
|
|
|
return false, false, nil
|
|
}
|
|
|
|
authsha := sha256.Sum256([]byte(authhdr[0]))
|
|
|
|
// Check for limited auth first as in environments with limited users, those
|
|
// are probably expected to have a higher volume of calls
|
|
limitcmp := subtle.ConstantTimeCompare(authsha[:], s.limitauthsha[:])
|
|
if limitcmp == 1 {
|
|
return true, false, nil
|
|
}
|
|
|
|
// Check for admin-level auth
|
|
cmp := subtle.ConstantTimeCompare(authsha[:], s.authsha[:])
|
|
if cmp == 1 {
|
|
return true, true, nil
|
|
}
|
|
|
|
// Request's auth doesn't match either user
|
|
rpcsLog.Warnf("RPC authentication failure from %s", r.RemoteAddr)
|
|
return false, false, errors.New("auth failure")
|
|
}
|
|
|
|
// parsedRPCCmd represents a JSON-RPC request object that has been parsed into
|
|
// a known concrete command along with any error that might have happened while
|
|
// parsing it.
|
|
type parsedRPCCmd struct {
|
|
id interface{}
|
|
method string
|
|
cmd interface{}
|
|
err *btcjson.RPCError
|
|
}
|
|
|
|
// standardCmdResult checks that a parsed command is a standard Bitcoin JSON-RPC
|
|
// command and runs the appropriate handler to reply to the command. Any
|
|
// commands which are not recognized or not implemented will return an error
|
|
// suitable for use in replies.
|
|
func (s *rpcServer) standardCmdResult(cmd *parsedRPCCmd, closeChan <-chan struct{}) (interface{}, error) {
|
|
handler, ok := rpcHandlers[cmd.method]
|
|
if ok {
|
|
goto handled
|
|
}
|
|
_, ok = rpcAskWallet[cmd.method]
|
|
if ok {
|
|
handler = handleAskWallet
|
|
goto handled
|
|
}
|
|
_, ok = rpcUnimplemented[cmd.method]
|
|
if ok {
|
|
handler = handleUnimplemented
|
|
goto handled
|
|
}
|
|
return nil, btcjson.ErrRPCMethodNotFound
|
|
handled:
|
|
|
|
return handler(s, cmd.cmd, closeChan)
|
|
}
|
|
|
|
// parseCmd parses a JSON-RPC request object into known concrete command. The
|
|
// err field of the returned parsedRPCCmd struct will contain an RPC error that
|
|
// is suitable for use in replies if the command is invalid in some way such as
|
|
// an unregistered command or invalid parameters.
|
|
func parseCmd(request *btcjson.Request) *parsedRPCCmd {
|
|
var parsedCmd parsedRPCCmd
|
|
parsedCmd.id = request.ID
|
|
parsedCmd.method = request.Method
|
|
|
|
cmd, err := btcjson.UnmarshalCmd(request)
|
|
if err != nil {
|
|
// When the error is because the method is not registered,
|
|
// produce a method not found RPC error.
|
|
if jerr, ok := err.(btcjson.Error); ok &&
|
|
jerr.ErrorCode == btcjson.ErrUnregisteredMethod {
|
|
|
|
parsedCmd.err = btcjson.ErrRPCMethodNotFound
|
|
return &parsedCmd
|
|
}
|
|
|
|
// Otherwise, some type of invalid parameters is the
|
|
// cause, so produce the equivalent RPC error.
|
|
parsedCmd.err = btcjson.NewRPCError(
|
|
btcjson.ErrRPCInvalidParams.Code, err.Error())
|
|
return &parsedCmd
|
|
}
|
|
|
|
parsedCmd.cmd = cmd
|
|
return &parsedCmd
|
|
}
|
|
|
|
// createMarshalledReply returns a new marshalled JSON-RPC response given the
|
|
// passed parameters. It will automatically convert errors that are not of
|
|
// the type *btcjson.RPCError to the appropriate type as needed.
|
|
func createMarshalledReply(id, result interface{}, replyErr error) ([]byte, error) {
|
|
var jsonErr *btcjson.RPCError
|
|
if replyErr != nil {
|
|
if jErr, ok := replyErr.(*btcjson.RPCError); ok {
|
|
jsonErr = jErr
|
|
} else {
|
|
jsonErr = internalRPCError(replyErr.Error(), "")
|
|
}
|
|
}
|
|
|
|
return btcjson.MarshalResponse(id, result, jsonErr)
|
|
}
|
|
|
|
// jsonRPCRead handles reading and responding to RPC messages.
|
|
func (s *rpcServer) jsonRPCRead(w http.ResponseWriter, r *http.Request, isAdmin bool) {
|
|
if atomic.LoadInt32(&s.shutdown) != 0 {
|
|
return
|
|
}
|
|
|
|
// Read and close the JSON-RPC request body from the caller.
|
|
body, err := ioutil.ReadAll(r.Body)
|
|
r.Body.Close()
|
|
if err != nil {
|
|
errCode := http.StatusBadRequest
|
|
http.Error(w, fmt.Sprintf("%d error reading JSON message: %v",
|
|
errCode, err), errCode)
|
|
return
|
|
}
|
|
|
|
// Unfortunately, the http server doesn't provide the ability to
|
|
// change the read deadline for the new connection and having one breaks
|
|
// long polling. However, not having a read deadline on the initial
|
|
// connection would mean clients can connect and idle forever. Thus,
|
|
// hijack the connecton from the HTTP server, clear the read deadline,
|
|
// and handle writing the response manually.
|
|
hj, ok := w.(http.Hijacker)
|
|
if !ok {
|
|
errMsg := "webserver doesn't support hijacking"
|
|
rpcsLog.Warnf(errMsg)
|
|
errCode := http.StatusInternalServerError
|
|
http.Error(w, strconv.Itoa(errCode)+" "+errMsg, errCode)
|
|
return
|
|
}
|
|
conn, buf, err := hj.Hijack()
|
|
if err != nil {
|
|
rpcsLog.Warnf("Failed to hijack HTTP connection: %v", err)
|
|
errCode := http.StatusInternalServerError
|
|
http.Error(w, strconv.Itoa(errCode)+" "+err.Error(), errCode)
|
|
return
|
|
}
|
|
defer conn.Close()
|
|
defer buf.Flush()
|
|
conn.SetReadDeadline(timeZeroVal)
|
|
|
|
// Attempt to parse the raw body into a JSON-RPC request.
|
|
var responseID interface{}
|
|
var jsonErr error
|
|
var result interface{}
|
|
var request btcjson.Request
|
|
if err := json.Unmarshal(body, &request); err != nil {
|
|
jsonErr = &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCParse.Code,
|
|
Message: "Failed to parse request: " + err.Error(),
|
|
}
|
|
}
|
|
if jsonErr == nil {
|
|
// The JSON-RPC 1.0 spec defines that notifications must have their "id"
|
|
// set to null and states that notifications do not have a response.
|
|
//
|
|
// A JSON-RPC 2.0 notification is a request with "json-rpc":"2.0", and
|
|
// without an "id" member. The specification states that notifications
|
|
// must not be responded to. JSON-RPC 2.0 permits the null value as a
|
|
// valid request id, therefore such requests are not notifications.
|
|
//
|
|
// Bitcoin Core serves requests with "id":null or even an absent "id",
|
|
// and responds to such requests with "id":null in the response.
|
|
//
|
|
// Btcd does not respond to any request without and "id" or "id":null,
|
|
// regardless the indicated JSON-RPC protocol version unless RPC quirks
|
|
// are enabled. With RPC quirks enabled, such requests will be responded
|
|
// to if the reqeust does not indicate JSON-RPC version.
|
|
//
|
|
// RPC quirks can be enabled by the user to avoid compatibility issues
|
|
// with software relying on Core's behavior.
|
|
if request.ID == nil && !(cfg.RPCQuirks && request.Jsonrpc == "") {
|
|
return
|
|
}
|
|
|
|
// The parse was at least successful enough to have an ID so
|
|
// set it for the response.
|
|
responseID = request.ID
|
|
|
|
// Setup a close notifier. Since the connection is hijacked,
|
|
// the CloseNotifer on the ResponseWriter is not available.
|
|
closeChan := make(chan struct{}, 1)
|
|
go func() {
|
|
_, err := conn.Read(make([]byte, 1))
|
|
if err != nil {
|
|
close(closeChan)
|
|
}
|
|
}()
|
|
|
|
// Check if the user is limited and set error if method unauthorized
|
|
if !isAdmin {
|
|
if _, ok := rpcLimited[request.Method]; !ok {
|
|
jsonErr = &btcjson.RPCError{
|
|
Code: btcjson.ErrRPCInvalidParams.Code,
|
|
Message: "limited user not authorized for this method",
|
|
}
|
|
}
|
|
}
|
|
|
|
if jsonErr == nil {
|
|
// Attempt to parse the JSON-RPC request into a known concrete
|
|
// command.
|
|
parsedCmd := parseCmd(&request)
|
|
if parsedCmd.err != nil {
|
|
jsonErr = parsedCmd.err
|
|
} else {
|
|
result, jsonErr = s.standardCmdResult(parsedCmd, closeChan)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Marshal the response.
|
|
msg, err := createMarshalledReply(responseID, result, jsonErr)
|
|
if err != nil {
|
|
rpcsLog.Errorf("Failed to marshal reply: %v", err)
|
|
return
|
|
}
|
|
|
|
// Write the response.
|
|
err = s.writeHTTPResponseHeaders(r, w.Header(), http.StatusOK, buf)
|
|
if err != nil {
|
|
rpcsLog.Error(err)
|
|
return
|
|
}
|
|
if _, err := buf.Write(msg); err != nil {
|
|
rpcsLog.Errorf("Failed to write marshalled reply: %v", err)
|
|
}
|
|
|
|
// Terminate with newline to maintain compatibility with Bitcoin Core.
|
|
if err := buf.WriteByte('\n'); err != nil {
|
|
rpcsLog.Errorf("Failed to append terminating newline to reply: %v", err)
|
|
}
|
|
}
|
|
|
|
// jsonAuthFail sends a message back to the client if the http auth is rejected.
|
|
func jsonAuthFail(w http.ResponseWriter) {
|
|
w.Header().Add("WWW-Authenticate", `Basic realm="btcd RPC"`)
|
|
http.Error(w, "401 Unauthorized.", http.StatusUnauthorized)
|
|
}
|
|
|
|
// Start is used by server.go to start the rpc listener.
|
|
func (s *rpcServer) Start() {
|
|
if atomic.AddInt32(&s.started, 1) != 1 {
|
|
return
|
|
}
|
|
|
|
rpcsLog.Trace("Starting RPC server")
|
|
rpcServeMux := http.NewServeMux()
|
|
httpServer := &http.Server{
|
|
Handler: rpcServeMux,
|
|
|
|
// Timeout connections which don't complete the initial
|
|
// handshake within the allowed timeframe.
|
|
ReadTimeout: time.Second * rpcAuthTimeoutSeconds,
|
|
}
|
|
rpcServeMux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Connection", "close")
|
|
w.Header().Set("Content-Type", "application/json")
|
|
r.Close = true
|
|
|
|
// Limit the number of connections to max allowed.
|
|
if s.limitConnections(w, r.RemoteAddr) {
|
|
return
|
|
}
|
|
|
|
// Keep track of the number of connected clients.
|
|
s.incrementClients()
|
|
defer s.decrementClients()
|
|
_, isAdmin, err := s.checkAuth(r, true)
|
|
if err != nil {
|
|
jsonAuthFail(w)
|
|
return
|
|
}
|
|
|
|
// Read and respond to the request.
|
|
s.jsonRPCRead(w, r, isAdmin)
|
|
})
|
|
|
|
// Websocket endpoint.
|
|
rpcServeMux.HandleFunc("/ws", func(w http.ResponseWriter, r *http.Request) {
|
|
authenticated, isAdmin, err := s.checkAuth(r, false)
|
|
if err != nil {
|
|
jsonAuthFail(w)
|
|
return
|
|
}
|
|
|
|
// Attempt to upgrade the connection to a websocket connection
|
|
// using the default size for read/write buffers.
|
|
ws, err := websocket.Upgrade(w, r, nil, 0, 0)
|
|
if err != nil {
|
|
if _, ok := err.(websocket.HandshakeError); !ok {
|
|
rpcsLog.Errorf("Unexpected websocket error: %v",
|
|
err)
|
|
}
|
|
http.Error(w, "400 Bad Request.", http.StatusBadRequest)
|
|
return
|
|
}
|
|
s.WebsocketHandler(ws, r.RemoteAddr, authenticated, isAdmin)
|
|
})
|
|
|
|
for _, listener := range s.cfg.Listeners {
|
|
s.wg.Add(1)
|
|
go func(listener net.Listener) {
|
|
rpcsLog.Infof("RPC server listening on %s", listener.Addr())
|
|
httpServer.Serve(listener)
|
|
rpcsLog.Tracef("RPC listener done for %s", listener.Addr())
|
|
s.wg.Done()
|
|
}(listener)
|
|
}
|
|
|
|
s.ntfnMgr.Start()
|
|
}
|
|
|
|
// genCertPair generates a key/cert pair to the paths provided.
|
|
func genCertPair(certFile, keyFile string) error {
|
|
rpcsLog.Infof("Generating TLS certificates...")
|
|
|
|
org := "btcd autogenerated cert"
|
|
validUntil := time.Now().Add(10 * 365 * 24 * time.Hour)
|
|
cert, key, err := btcutil.NewTLSCertPair(org, validUntil, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Write cert and key files.
|
|
if err = ioutil.WriteFile(certFile, cert, 0666); err != nil {
|
|
return err
|
|
}
|
|
if err = ioutil.WriteFile(keyFile, key, 0600); err != nil {
|
|
os.Remove(certFile)
|
|
return err
|
|
}
|
|
|
|
rpcsLog.Infof("Done generating TLS certificates")
|
|
return nil
|
|
}
|
|
|
|
// rpcserverPeer represents a peer for use with the RPC server.
|
|
//
|
|
// The interface contract requires that all of these methods are safe for
|
|
// concurrent access.
|
|
type rpcserverPeer interface {
|
|
// ToPeer returns the underlying peer instance.
|
|
ToPeer() *peer.Peer
|
|
|
|
// IsTxRelayDisabled returns whether or not the peer has disabled
|
|
// transaction relay.
|
|
IsTxRelayDisabled() bool
|
|
|
|
// BanScore returns the current integer value that represents how close
|
|
// the peer is to being banned.
|
|
BanScore() uint32
|
|
|
|
// FeeFilter returns the requested current minimum fee rate for which
|
|
// transactions should be announced.
|
|
FeeFilter() int64
|
|
}
|
|
|
|
// rpcserverConnManager represents a connection manager for use with the RPC
|
|
// server.
|
|
//
|
|
// The interface contract requires that all of these methods are safe for
|
|
// concurrent access.
|
|
type rpcserverConnManager interface {
|
|
// Connect adds the provided address as a new outbound peer. The
|
|
// permanent flag indicates whether or not to make the peer persistent
|
|
// and reconnect if the connection is lost. Attempting to connect to an
|
|
// already existing peer will return an error.
|
|
Connect(addr string, permanent bool) error
|
|
|
|
// RemoveByID removes the peer associated with the provided id from the
|
|
// list of persistent peers. Attempting to remove an id that does not
|
|
// exist will return an error.
|
|
RemoveByID(id int32) error
|
|
|
|
// RemoveByAddr removes the peer associated with the provided address
|
|
// from the list of persistent peers. Attempting to remove an address
|
|
// that does not exist will return an error.
|
|
RemoveByAddr(addr string) error
|
|
|
|
// DisconnectByID disconnects the peer associated with the provided id.
|
|
// This applies to both inbound and outbound peers. Attempting to
|
|
// remove an id that does not exist will return an error.
|
|
DisconnectByID(id int32) error
|
|
|
|
// DisconnectByAddr disconnects the peer associated with the provided
|
|
// address. This applies to both inbound and outbound peers.
|
|
// Attempting to remove an address that does not exist will return an
|
|
// error.
|
|
DisconnectByAddr(addr string) error
|
|
|
|
// ConnectedCount returns the number of currently connected peers.
|
|
ConnectedCount() int32
|
|
|
|
// NetTotals returns the sum of all bytes received and sent across the
|
|
// network for all peers.
|
|
NetTotals() (uint64, uint64)
|
|
|
|
// ConnectedPeers returns an array consisting of all connected peers.
|
|
ConnectedPeers() []rpcserverPeer
|
|
|
|
// PersistentPeers returns an array consisting of all the persistent
|
|
// peers.
|
|
PersistentPeers() []rpcserverPeer
|
|
|
|
// BroadcastMessage sends the provided message to all currently
|
|
// connected peers.
|
|
BroadcastMessage(msg wire.Message)
|
|
|
|
// AddRebroadcastInventory adds the provided inventory to the list of
|
|
// inventories to be rebroadcast at random intervals until they show up
|
|
// in a block.
|
|
AddRebroadcastInventory(iv *wire.InvVect, data interface{})
|
|
|
|
// RelayTransactions generates and relays inventory vectors for all of
|
|
// the passed transactions to all connected peers.
|
|
RelayTransactions(txns []*mempool.TxDesc)
|
|
}
|
|
|
|
// rpcserverSyncManager represents a sync manager for use with the RPC server.
|
|
//
|
|
// The interface contract requires that all of these methods are safe for
|
|
// concurrent access.
|
|
type rpcserverSyncManager interface {
|
|
// IsCurrent returns whether or not the sync manager believes the chain
|
|
// is current as compared to the rest of the network.
|
|
IsCurrent() bool
|
|
|
|
// SubmitBlock submits the provided block to the network after
|
|
// processing it locally.
|
|
SubmitBlock(block *btcutil.Block, flags blockchain.BehaviorFlags) (bool, error)
|
|
|
|
// Pause pauses the sync manager until the returned channel is closed.
|
|
Pause() chan<- struct{}
|
|
|
|
// SyncPeerID returns the ID of the peer that is currently the peer being
|
|
// used to sync from or 0 if there is none.
|
|
SyncPeerID() int32
|
|
|
|
// LocateHeaders returns the headers of the blocks after the first known
|
|
// block in the provided locators until the provided stop hash or the
|
|
// current tip is reached, up to a max of wire.MaxBlockHeadersPerMsg
|
|
// hashes.
|
|
LocateHeaders(locators []*chainhash.Hash, hashStop *chainhash.Hash) []wire.BlockHeader
|
|
}
|
|
|
|
// rpcserverConfig is a descriptor containing the RPC server configuration.
|
|
type rpcserverConfig struct {
|
|
// Listeners defines a slice of listeners for which the RPC server will
|
|
// take ownership of and accept connections. Since the RPC server takes
|
|
// ownership of these listeners, they will be closed when the RPC server
|
|
// is stopped.
|
|
Listeners []net.Listener
|
|
|
|
// StartupTime is the unix timestamp for when the server that is hosting
|
|
// the RPC server started.
|
|
StartupTime int64
|
|
|
|
// ConnMgr defines the connection manager for the RPC server to use. It
|
|
// provides the RPC server with a means to do things such as add,
|
|
// remove, connect, disconnect, and query peers as well as other
|
|
// connection-related data and tasks.
|
|
ConnMgr rpcserverConnManager
|
|
|
|
// SyncMgr defines the sync manager for the RPC server to use.
|
|
SyncMgr rpcserverSyncManager
|
|
|
|
// These fields allow the RPC server to interface with the local block
|
|
// chain data and state.
|
|
TimeSource blockchain.MedianTimeSource
|
|
Chain *blockchain.BlockChain
|
|
ChainParams *chaincfg.Params
|
|
DB database.DB
|
|
|
|
// TxMemPool defines the transaction memory pool to interact with.
|
|
TxMemPool *mempool.TxPool
|
|
|
|
// These fields allow the RPC server to interface with mining.
|
|
//
|
|
// Generator produces block templates and the CPUMiner solves them using
|
|
// the CPU. CPU mining is typically only useful for test purposes when
|
|
// doing regression or simulation testing.
|
|
Generator *mining.BlkTmplGenerator
|
|
CPUMiner *cpuminer.CPUMiner
|
|
|
|
// These fields define any optional indexes the RPC server can make use
|
|
// of to provide additional data when queried.
|
|
TxIndex *indexers.TxIndex
|
|
AddrIndex *indexers.AddrIndex
|
|
CfIndex *indexers.CfIndex
|
|
|
|
// The fee estimator keeps track of how long transactions are left in
|
|
// the mempool before they are mined into blocks.
|
|
FeeEstimator *mempool.FeeEstimator
|
|
}
|
|
|
|
// newRPCServer returns a new instance of the rpcServer struct.
|
|
func newRPCServer(config *rpcserverConfig) (*rpcServer, error) {
|
|
rpc := rpcServer{
|
|
cfg: *config,
|
|
statusLines: make(map[int]string),
|
|
gbtWorkState: newGbtWorkState(config.TimeSource),
|
|
helpCacher: newHelpCacher(),
|
|
requestProcessShutdown: make(chan struct{}),
|
|
quit: make(chan int),
|
|
}
|
|
if cfg.RPCUser != "" && cfg.RPCPass != "" {
|
|
login := cfg.RPCUser + ":" + cfg.RPCPass
|
|
auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(login))
|
|
rpc.authsha = sha256.Sum256([]byte(auth))
|
|
}
|
|
if cfg.RPCLimitUser != "" && cfg.RPCLimitPass != "" {
|
|
login := cfg.RPCLimitUser + ":" + cfg.RPCLimitPass
|
|
auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(login))
|
|
rpc.limitauthsha = sha256.Sum256([]byte(auth))
|
|
}
|
|
rpc.ntfnMgr = newWsNotificationManager(&rpc)
|
|
rpc.cfg.Chain.Subscribe(rpc.handleBlockchainNotification)
|
|
|
|
return &rpc, nil
|
|
}
|
|
|
|
// Callback for notifications from blockchain. It notifies clients that are
|
|
// long polling for changes or subscribed to websockets notifications.
|
|
func (s *rpcServer) handleBlockchainNotification(notification *blockchain.Notification) {
|
|
switch notification.Type {
|
|
case blockchain.NTBlockAccepted:
|
|
block, ok := notification.Data.(*btcutil.Block)
|
|
if !ok {
|
|
rpcsLog.Warnf("Chain accepted notification is not a block.")
|
|
break
|
|
}
|
|
|
|
// Allow any clients performing long polling via the
|
|
// getblocktemplate RPC to be notified when the new block causes
|
|
// their old block template to become stale.
|
|
s.gbtWorkState.NotifyBlockConnected(block.Hash())
|
|
|
|
case blockchain.NTBlockConnected:
|
|
block, ok := notification.Data.(*btcutil.Block)
|
|
if !ok {
|
|
rpcsLog.Warnf("Chain connected notification is not a block.")
|
|
break
|
|
}
|
|
|
|
// Notify registered websocket clients of incoming block.
|
|
s.ntfnMgr.NotifyBlockConnected(block)
|
|
|
|
case blockchain.NTBlockDisconnected:
|
|
block, ok := notification.Data.(*btcutil.Block)
|
|
if !ok {
|
|
rpcsLog.Warnf("Chain disconnected notification is not a block.")
|
|
break
|
|
}
|
|
|
|
// Notify registered websocket clients.
|
|
s.ntfnMgr.NotifyBlockDisconnected(block)
|
|
}
|
|
}
|
|
|
|
func init() {
|
|
rpcHandlers = rpcHandlersBeforeInit
|
|
rand.Seed(time.Now().UnixNano())
|
|
}
|