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160 lines
3.8 KiB
160 lines
3.8 KiB
package core
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import (
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"fmt"
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"time"
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dbm "github.com/tendermint/tm-db"
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cfg "github.com/tendermint/tendermint/config"
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"github.com/tendermint/tendermint/consensus"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/libs/log"
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mempl "github.com/tendermint/tendermint/mempool"
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"github.com/tendermint/tendermint/p2p"
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"github.com/tendermint/tendermint/proxy"
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sm "github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/state/txindex"
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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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)
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var (
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// set by Node
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env *Environment
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)
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// SetEnvironment sets up the given Environment.
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// It will race if multiple Node call SetEnvironment.
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func SetEnvironment(e *Environment) {
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env = e
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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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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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// interfaces defined in types and above
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StateDB dbm.DB
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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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TxIndexer txindex.TxIndexer
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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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}
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//----------------------------------------------
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func validatePage(page, perPage, totalCount int) (int, error) {
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if perPage < 1 {
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panic(fmt.Sprintf("zero or negative perPage: %d", perPage))
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}
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if page == 0 {
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return 1, nil // default
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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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if page < 0 || page > pages {
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return 1, fmt.Errorf("page should be within [0, %d] range, given %d", pages, page)
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}
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return page, nil
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}
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func validatePerPage(perPage int) int {
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if perPage < 1 {
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return defaultPerPage
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} else if perPage > maxPerPage {
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return maxPerPage
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}
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return perPage
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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 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("height must be greater than 0, but got %d", height)
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}
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if height > latestHeight {
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return 0, fmt.Errorf("height %d must be less than or equal to the current blockchain height %d",
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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("height %v is not available, blocks pruned at height %v",
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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 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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