215 lines
7.3 KiB
Go
215 lines
7.3 KiB
Go
package bchain
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import (
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"context"
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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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"math/big"
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)
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// errors with specific meaning returned by blockchain rpc
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var (
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// ErrBlockNotFound is returned when block is not found
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// either unknown hash or too high height
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// can be returned from GetBlockHash, GetBlockHeader, GetBlock
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ErrBlockNotFound = errors.New("Block not found")
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// ErrAddressMissing is returned if address is not specified
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// for example To address in ethereum can be missing in case of contract transaction
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ErrAddressMissing = errors.New("Address missing")
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// ErrTxidMissing is returned if txid is not specified
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// for example coinbase transactions in Bitcoin
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ErrTxidMissing = errors.New("Txid missing")
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)
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type ScriptSig struct {
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// Asm string `json:"asm"`
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Hex string `json:"hex"`
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}
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type Vin struct {
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Coinbase string `json:"coinbase"`
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Txid string `json:"txid"`
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Vout uint32 `json:"vout"`
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ScriptSig ScriptSig `json:"scriptSig"`
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Sequence uint32 `json:"sequence"`
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Addresses []string `json:"addresses"`
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}
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type ScriptPubKey struct {
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// Asm string `json:"asm"`
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Hex string `json:"hex,omitempty"`
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// Type string `json:"type"`
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Addresses []string `json:"addresses"`
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}
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type Vout struct {
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ValueSat big.Int
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JsonValue json.Number `json:"value"`
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N uint32 `json:"n"`
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ScriptPubKey ScriptPubKey `json:"scriptPubKey"`
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}
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// Tx is blockchain transaction
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// unnecessary fields are commented out to avoid overhead
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type Tx struct {
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Hex string `json:"hex"`
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Txid string `json:"txid"`
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Version int32 `json:"version"`
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LockTime uint32 `json:"locktime"`
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Vin []Vin `json:"vin"`
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Vout []Vout `json:"vout"`
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// BlockHash string `json:"blockhash,omitempty"`
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Confirmations uint32 `json:"confirmations,omitempty"`
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Time int64 `json:"time,omitempty"`
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Blocktime int64 `json:"blocktime,omitempty"`
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}
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type Block struct {
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BlockHeader
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Txs []Tx `json:"tx"`
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}
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// BlockHeader contains limited data (as needed for indexing) from backend block header
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type BlockHeader struct {
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Hash string `json:"hash"`
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Prev string `json:"previousblockhash"`
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Next string `json:"nextblockhash"`
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Height uint32 `json:"height"`
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Confirmations int `json:"confirmations"`
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Size int `json:"size"`
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Time int64 `json:"time,omitempty"`
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}
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// BlockInfo contains extended block header data and a list of block txids
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type BlockInfo struct {
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BlockHeader
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Version json.Number `json:"version"`
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MerkleRoot string `json:"merkleroot"`
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Nonce json.Number `json:"nonce"`
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Bits string `json:"bits"`
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Difficulty json.Number `json:"difficulty"`
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Txids []string `json:"tx,omitempty"`
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}
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type MempoolEntry struct {
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Size uint32 `json:"size"`
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FeeSat big.Int
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Fee json.Number `json:"fee"`
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ModifiedFeeSat big.Int
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ModifiedFee json.Number `json:"modifiedfee"`
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Time uint64 `json:"time"`
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Height uint32 `json:"height"`
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DescendantCount uint32 `json:"descendantcount"`
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DescendantSize uint32 `json:"descendantsize"`
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DescendantFees uint32 `json:"descendantfees"`
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AncestorCount uint32 `json:"ancestorcount"`
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AncestorSize uint32 `json:"ancestorsize"`
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AncestorFees uint32 `json:"ancestorfees"`
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Depends []string `json:"depends"`
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}
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type ChainInfo struct {
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Chain string `json:"chain"`
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Blocks int `json:"blocks"`
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Headers int `json:"headers"`
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Bestblockhash string `json:"bestblockhash"`
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Difficulty string `json:"difficulty"`
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SizeOnDisk int64 `json:"size_on_disk"`
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Version string `json:"version"`
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Subversion string `json:"subversion"`
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ProtocolVersion string `json:"protocolversion"`
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Timeoffset float64 `json:"timeoffset"`
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Warnings string `json:"warnings"`
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}
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type RPCError struct {
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Code int `json:"code"`
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Message string `json:"message"`
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}
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func (e *RPCError) Error() string {
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return fmt.Sprintf("%d: %s", e.Code, e.Message)
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}
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// AddressDescriptor is an opaque type obtained by parser.GetAddrDesc* methods
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type AddressDescriptor []byte
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func (ad AddressDescriptor) String() string {
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return "ad:" + hex.EncodeToString(ad)
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}
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// OnNewBlockFunc is used to send notification about a new block
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type OnNewBlockFunc func(hash string, height uint32)
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// OnNewTxAddrFunc is used to send notification about a new transaction/address
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type OnNewTxAddrFunc func(txid string, addr string, isOutput bool)
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// BlockChain defines common interface to block chain daemon
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type BlockChain interface {
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// life-cycle methods
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Initialize() error
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Shutdown(ctx context.Context) error
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// chain info
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IsTestnet() bool
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GetNetworkName() string
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GetSubversion() string
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GetCoinName() string
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GetChainInfo() (*ChainInfo, error)
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// requests
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GetBestBlockHash() (string, error)
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GetBestBlockHeight() (uint32, error)
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GetBlockHash(height uint32) (string, error)
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GetBlockHeader(hash string) (*BlockHeader, error)
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GetBlock(hash string, height uint32) (*Block, error)
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GetBlockInfo(hash string) (*BlockInfo, error)
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GetMempool() ([]string, error)
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GetTransaction(txid string) (*Tx, error)
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GetTransactionForMempool(txid string) (*Tx, error)
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EstimateSmartFee(blocks int, conservative bool) (big.Int, error)
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EstimateFee(blocks int) (big.Int, error)
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SendRawTransaction(tx string) (string, error)
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// mempool
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ResyncMempool(onNewTxAddr OnNewTxAddrFunc) (int, error)
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GetMempoolTransactions(address string) ([]string, error)
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GetMempoolTransactionsForAddrDesc(addrDesc AddressDescriptor) ([]string, error)
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GetMempoolEntry(txid string) (*MempoolEntry, error)
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// parser
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GetChainParser() BlockChainParser
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}
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// BlockChainParser defines common interface to parsing and conversions of block chain data
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type BlockChainParser interface {
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// chain configuration description
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// UTXO chains need "inputs" column in db, that map transactions to transactions that spend them
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// non UTXO chains have mapping of address to input and output transactions directly in "outputs" column in db
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IsUTXOChain() bool
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// KeepBlockAddresses returns number of blocks which are to be kept in blockaddresses column
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// and used in case of fork
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// if 0 the blockaddresses column is not used at all (usually non UTXO chains)
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KeepBlockAddresses() int
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// AmountToDecimalString converts amount in big.Int to string with decimal point in the correct place
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AmountToDecimalString(a *big.Int) string
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// AmountToBigInt converts amount in json.Number (string) to big.Int
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// it uses string operations to avoid problems with rounding
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AmountToBigInt(n json.Number) (big.Int, error)
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// address descriptor conversions
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GetAddrDescFromVout(output *Vout) (AddressDescriptor, error)
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GetAddrDescFromAddress(address string) (AddressDescriptor, error)
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GetAddressesFromAddrDesc(addrDesc AddressDescriptor) ([]string, bool, error)
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GetScriptFromAddrDesc(addrDesc AddressDescriptor) ([]byte, error)
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// transactions
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PackedTxidLen() int
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PackTxid(txid string) ([]byte, error)
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UnpackTxid(buf []byte) (string, error)
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ParseTx(b []byte) (*Tx, error)
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ParseTxFromJson(json.RawMessage) (*Tx, error)
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PackTx(tx *Tx, height uint32, blockTime int64) ([]byte, error)
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UnpackTx(buf []byte) (*Tx, uint32, error)
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// blocks
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PackBlockHash(hash string) ([]byte, error)
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UnpackBlockHash(buf []byte) (string, error)
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ParseBlock(b []byte) (*Block, error)
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}
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