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197 lines
5.1 KiB
197 lines
5.1 KiB
package core
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import (
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"encoding/base64"
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"fmt"
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"time"
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cfg "github.com/tendermint/tendermint/config"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/internal/consensus"
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mempl "github.com/tendermint/tendermint/internal/mempool"
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"github.com/tendermint/tendermint/internal/p2p"
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tmjson "github.com/tendermint/tendermint/libs/json"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/proxy"
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ctypes "github.com/tendermint/tendermint/rpc/core/types"
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sm "github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/state/indexer"
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"github.com/tendermint/tendermint/types"
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)
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const (
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// see README
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defaultPerPage = 30
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maxPerPage = 100
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// SubscribeTimeout is the maximum time we wait to subscribe for an event.
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// must be less than the server's write timeout (see rpcserver.DefaultConfig)
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SubscribeTimeout = 5 * time.Second
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// genesisChunkSize is the maximum size, in bytes, of each
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// chunk in the genesis structure for the chunked API
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genesisChunkSize = 16 * 1024 * 1024 // 16
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)
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//----------------------------------------------
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// These interfaces are used by RPC and must be thread safe
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type Consensus interface {
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GetState() sm.State
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GetValidators() (int64, []*types.Validator)
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GetLastHeight() int64
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GetRoundStateJSON() ([]byte, error)
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GetRoundStateSimpleJSON() ([]byte, error)
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}
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type transport interface {
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Listeners() []string
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IsListening() bool
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NodeInfo() p2p.NodeInfo
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}
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type peers interface {
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AddPersistentPeers([]string) error
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AddUnconditionalPeerIDs([]string) error
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AddPrivatePeerIDs([]string) error
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DialPeersAsync([]string) error
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Peers() p2p.IPeerSet
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}
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//----------------------------------------------
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// Environment contains objects and interfaces used by the RPC. It is expected
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// to be setup once during startup.
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type Environment struct {
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// external, thread safe interfaces
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ProxyAppQuery proxy.AppConnQuery
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ProxyAppMempool proxy.AppConnMempool
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// interfaces defined in types and above
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StateStore sm.Store
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BlockStore sm.BlockStore
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EvidencePool sm.EvidencePool
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ConsensusState Consensus
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P2PPeers peers
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P2PTransport transport
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// objects
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PubKey crypto.PubKey
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GenDoc *types.GenesisDoc // cache the genesis structure
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EventSinks []indexer.EventSink
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ConsensusReactor *consensus.Reactor
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EventBus *types.EventBus // thread safe
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Mempool mempl.Mempool
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Logger log.Logger
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Config cfg.RPCConfig
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// cache of chunked genesis data.
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genChunks []string
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}
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//----------------------------------------------
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func validatePage(pagePtr *int, perPage, totalCount int) (int, error) {
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// this can only happen if we haven't first run validatePerPage
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if perPage < 1 {
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panic(fmt.Errorf("%w (%d)", ctypes.ErrZeroOrNegativePerPage, perPage))
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}
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if pagePtr == nil { // no page parameter
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return 1, nil
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}
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pages := ((totalCount - 1) / perPage) + 1
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if pages == 0 {
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pages = 1 // one page (even if it's empty)
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}
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page := *pagePtr
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if page <= 0 || page > pages {
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return 1, fmt.Errorf("%w expected range: [1, %d], given %d", ctypes.ErrPageOutOfRange, pages, page)
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}
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return page, nil
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}
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func (env *Environment) validatePerPage(perPagePtr *int) int {
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if perPagePtr == nil { // no per_page parameter
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return defaultPerPage
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}
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perPage := *perPagePtr
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if perPage < 1 {
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return defaultPerPage
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// in unsafe mode there is no max on the page size but in safe mode
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// we cap it to maxPerPage
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} else if perPage > maxPerPage && !env.Config.Unsafe {
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return maxPerPage
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}
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return perPage
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}
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// InitGenesisChunks configures the environment and should be called on service
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// startup.
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func (env *Environment) InitGenesisChunks() error {
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if env.genChunks != nil {
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return nil
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}
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if env.GenDoc == nil {
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return nil
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}
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data, err := tmjson.Marshal(env.GenDoc)
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if err != nil {
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return err
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}
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for i := 0; i < len(data); i += genesisChunkSize {
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end := i + genesisChunkSize
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if end > len(data) {
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end = len(data)
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}
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env.genChunks = append(env.genChunks, base64.StdEncoding.EncodeToString(data[i:end]))
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}
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return nil
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}
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func validateSkipCount(page, perPage int) int {
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skipCount := (page - 1) * perPage
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if skipCount < 0 {
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return 0
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}
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return skipCount
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}
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// latestHeight can be either latest committed or uncommitted (+1) height.
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func (env *Environment) getHeight(latestHeight int64, heightPtr *int64) (int64, error) {
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if heightPtr != nil {
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height := *heightPtr
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if height <= 0 {
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return 0, fmt.Errorf("%w (requested height: %d)", ctypes.ErrZeroOrNegativeHeight, height)
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}
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if height > latestHeight {
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return 0, fmt.Errorf("%w (requested height: %d, blockchain height: %d)",
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ctypes.ErrHeightExceedsChainHead, height, latestHeight)
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}
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base := env.BlockStore.Base()
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if height < base {
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return 0, fmt.Errorf("%w (requested height: %d, base height: %d)", ctypes.ErrHeightNotAvailable, height, base)
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}
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return height, nil
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}
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return latestHeight, nil
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}
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func (env *Environment) latestUncommittedHeight() int64 {
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nodeIsSyncing := env.ConsensusReactor.WaitSync()
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if nodeIsSyncing {
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return env.BlockStore.Height()
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}
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return env.BlockStore.Height() + 1
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}
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