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package core
import (
"fmt"
"time"
dbm "github.com/tendermint/tm-db"
cfg "github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/consensus"
"github.com/tendermint/tendermint/crypto"
"github.com/tendermint/tendermint/libs/log"
mempl "github.com/tendermint/tendermint/mempool"
"github.com/tendermint/tendermint/p2p"
"github.com/tendermint/tendermint/proxy"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/state/txindex"
"github.com/tendermint/tendermint/types"
)
const (
// see README
defaultPerPage = 30
maxPerPage = 100
// SubscribeTimeout is the maximum time we wait to subscribe for an event.
// must be less than the server's write timeout (see rpcserver.DefaultConfig)
SubscribeTimeout = 5 * time.Second
)
var (
// set by Node
env *Environment
)
// SetEnvironment sets up the given Environment.
// It will race if multiple Node call SetEnvironment.
func SetEnvironment(e *Environment) {
env = e
}
//----------------------------------------------
// These interfaces are used by RPC and must be thread safe
type Consensus interface {
GetState() sm.State
GetValidators() (int64, []*types.Validator)
GetLastHeight() int64
GetRoundStateJSON() ([]byte, error)
GetRoundStateSimpleJSON() ([]byte, error)
}
type transport interface {
Listeners() []string
IsListening() bool
NodeInfo() p2p.NodeInfo
}
type peers interface {
AddPersistentPeers([]string) error
DialPeersAsync([]string) error
Peers() p2p.IPeerSet
}
//----------------------------------------------
// Environment contains objects and interfaces used by the RPC. It is expected
// to be setup once during startup.
type Environment struct {
// external, thread safe interfaces
ProxyAppQuery proxy.AppConnQuery
// interfaces defined in types and above
StateDB dbm.DB
BlockStore sm.BlockStore
EvidencePool sm.EvidencePool
ConsensusState Consensus
P2PPeers peers
P2PTransport transport
// objects
PubKey crypto.PubKey
GenDoc *types.GenesisDoc // cache the genesis structure
TxIndexer txindex.TxIndexer
ConsensusReactor *consensus.Reactor
EventBus *types.EventBus // thread safe
Mempool mempl.Mempool
Logger log.Logger
Config cfg.RPCConfig
}
//----------------------------------------------
func validatePage(page, perPage, totalCount int) (int, error) {
if perPage < 1 {
panic(fmt.Sprintf("zero or negative perPage: %d", perPage))
}
if page == 0 {
return 1, nil // default
}
pages := ((totalCount - 1) / perPage) + 1
if pages == 0 {
pages = 1 // one page (even if it's empty)
}
if page < 0 || page > pages {
return 1, fmt.Errorf("page should be within [0, %d] range, given %d", pages, page)
}
return page, nil
}
func validatePerPage(perPage int) int {
if perPage < 1 {
return defaultPerPage
} else if perPage > maxPerPage {
return maxPerPage
}
return perPage
}
func validateSkipCount(page, perPage int) int {
skipCount := (page - 1) * perPage
if skipCount < 0 {
return 0
}
return skipCount
}
// latestHeight can be either latest committed or uncommitted (+1) height.
func getHeight(latestHeight int64, heightPtr *int64) (int64, error) {
if heightPtr != nil {
height := *heightPtr
if height <= 0 {
return 0, fmt.Errorf("height must be greater than 0, but got %d", height)
}
if height > latestHeight {
return 0, fmt.Errorf("height %d must be less than or equal to the current blockchain height %d",
height, latestHeight)
}
base := env.BlockStore.Base()
if height < base {
return 0, fmt.Errorf("height %v is not available, blocks pruned at height %v",
height, base)
}
return height, nil
}
return latestHeight, nil
}
func latestUncommittedHeight() int64 {
nodeIsSyncing := env.ConsensusReactor.WaitSync()
if nodeIsSyncing {
return env.BlockStore.Height()
}
return env.BlockStore.Height() + 1
}