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. "../util"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/clique"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/rpc"
"sort"
)
type Node rpc.Client
type Snapshot struct {
Number uint64 `json:"number"` // Block number where the snapshot was created
Hash common.Hash `json:"hash"` // Block hash where the snapshot was created
Signers map[common.Address]struct{} `json:"signers"` // Set of authorized signers at this moment
Recents map[uint64]common.Address `json:"recents"` // Set of recent signers for spam protections
Votes []*clique.Vote `json:"votes"` // List of votes cast in chronological order
Tally map[common.Address]clique.Tally `json:"tally"` // Current vote tally to avoid recalculating
}
type Tally struct {
True int `json:"true"`
False int `json:"false"`
Null int `json:"null"`
}
type Proposals struct {
BlockNumber int64 `json:"number"` // Block number where the snapshot was created
Proposals []string `json:"proposals"` // List of proposals being voted
Signers []string `json:"signers"` // List of authorized signers at this moment
Tally map[string]*Tally `json:"tally"` // Count of positive, negative and empty votes for a proposal
Votes map[string]map[string]*bool `json:"votes"` // List of votes for each proposal
}
type SealerInfo struct {
Address string
CurrentBlock int64
Since int64
FirstBlock int64
LastBlock int64
}
func (node *Node) Call(result interface{}, method string, args ...interface{}) {
Check((*rpc.Client)(node).Call(result, method, args...))
}
func (node *Node) blockNumber() int64 {
var bn rpc.BlockNumber
node.Call(&bn, "eth_blockNumber")
return bn.Int64()
}
func (node *Node) GetBlockByNumber(blockNumber int64) types.Header {
var (
number string
resp types.Header
)
if blockNumber < 0 {
number = "latest"
} else {
number = fmt.Sprintf("0x%x", blockNumber)
}
node.Call(&resp, "eth_getBlockByNumber", number, false)
return resp
}
func (node *Node) GetBlockSigner(blockNumber int64) (signer string) {
header := node.GetBlockByNumber(blockNumber)
Check(err)
return
}
func (node *Node) GetSnapshot() (snapshot Snapshot) {
node.Call(&snapshot, "clique_getSnapshot", nil)
return
}
func (node *Node) GetSnapshotAtHash(hash common.Hash) (snapshot Snapshot) {
node.Call(&snapshot, "clique_getSnapshotAtHash", hash)
return
}
func (node *Node) GetSnapshotAtBlock(blockNumber int64) (snapshot Snapshot) {
if blockNumber < 0 {
return node.GetSnapshot()
}
node.Call(&snapshot, "clique_getSnapshot", Int64ToHex(blockNumber))
return
}
func (node *Node) GetSigners() (signers []string) {
var s []common.Address
node.Call(&s, "clique_getSigners", nil)
for _, signer := range s {
signers = append(signers, BytesToHex(signer.Bytes()))
}
return
}
func (node *Node) GetSignersAtHash(hash common.Hash) (signers []string) {
var s []common.Address
node.Call(&signers, "clique_getSignersAtHash", hash)
for _, signer := range s {
signers = append(signers, BytesToHex(signer.Bytes()))
}
return
}
func (node *Node) GetSignersAtBlock(blockNumber int64) (signers []string) {
var s []common.Address
if blockNumber < 0 {
return node.GetSigners()
}
node.Call(&s, "clique_getSigners", Int64ToHex(blockNumber))
for _, signer := range s {
signers = append(signers, BytesToHex(signer.Bytes()))
func (node *Node) Propose(address string, vote bool){
node.Call(nil, "clique_propose", address, vote)
return
}
func (node *Node) GetVotes(blockNumber int64) (votes Proposals) {
var (
snapshot Snapshot
)
if blockNumber < 0 {
snapshot = node.GetSnapshot()
} else {
snapshot = node.GetSnapshotAtBlock(blockNumber)
}
votes.BlockNumber = int64(snapshot.Number)
for signer := range snapshot.Signers {
votes.Signers = append(votes.Signers, BytesToHex(signer[:]))
sort.Strings(votes.Signers)
}
for proposal := range snapshot.Tally {
votes.Proposals = append(votes.Proposals, BytesToHex(proposal[:]))
}
votes.Votes = make(map[string]map[string]*bool)
votes.Tally = make(map[string]*Tally)
for _, v := range snapshot.Votes {
proposal := BytesToHex(v.Address[:])
signer := BytesToHex(v.Signer[:])
if votes.Votes[proposal] == nil {
votes.Votes[proposal] = make(map[string]*bool)
for _, signer := range votes.Signers {
votes.Votes[proposal][signer] = nil
}
votes.Tally[proposal] = &Tally{0, 0, len(votes.Signers)}
}
votes.Votes[proposal][signer] = &v.Authorize
if v.Authorize {
votes.Tally[proposal].True += 1
} else {
votes.Tally[proposal].False += 1
}
votes.Tally[proposal].Null -= 1
}
return
}
func (node *Node) SealersStatus(blockNumber int64) (status map[string]int64) {
if blockNumber == 0 { // Genesis block doesn't have signer
return
}
status = make(map[string]int64)
for _, address := range node.GetSignersAtBlock(blockNumber) {
status[address] = -1
}
notSeen := int64(len(status))
block := node.GetBlockByNumber(blockNumber)
blockNumber = block.Number.Int64()
until := Max(1, blockNumber - 5*notSeen)
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if status[signer] == -1 {
status[signer] = block.Number.Int64()
notSeen--
}
if blockNumber == until {
break
}
blockNumber--
block = node.GetBlockByNumber(blockNumber)
}
return status
}
func (node *Node) GetSealerInception(address string) (since int64) {
if signers := node.GetSigners(); !Contains(signers, address) {
return -1
}
lo := int64(0)
hi := node.blockNumber()
for lo < hi {
mid := lo + (hi-lo)/2
signers := node.GetSignersAtBlock(mid)
if Contains(signers, address) {
hi = mid
} else {
lo = mid + 1
}
}
return hi
}
func (node *Node) getSignerFirstBlock(signer string, since int64, until int64) (blockNumber int64) {
if since < 0 {
return -1
}
//snapshot := node.GetSnapshotAtBlock(since)
var (count int64 = 20
found int64 = -1
)
// first, we look close to the inception
if blockNumber, _ = node.searchSnapshotForward(since, signer, count); blockNumber > 0 {
return
}
// next, we do a coarse search
since += count
for i := since + 10000; i < until && found == -1; i += 10000 {
if found, _ = node.searchSnapshotBackward(i, signer, 0); found == -1 { // still not found
since = i
}
}
if found > 0 {
until = found
}
n := Min(10, (until-since)/count+1) // number of goroutines
ch := make(chan int64)
for i := int64(0); i < n; i++ {
go func() {
for blockNumber := <-ch; blockNumber > 0; blockNumber = <-ch {
cnt := Min(count, until-blockNumber+1)
if found, _ := node.searchSnapshotForward(blockNumber, signer, cnt); found > 0 {
ch <- found
}
}
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}()
}
for {
select {
case ch <- since:
switch {
case since < 0:
continue
case since+count < until:
since += count
default:
since = -1 //we have exhausted the search space
}
case found := <-ch:
switch {
case found < 0:
n-- // a goroutine has ended
if n == 0 { // all goroutines have ended
return
}
case blockNumber < 0:
blockNumber = found // first time we see this signer
since = -1 // Notify everyone
case found < blockNumber:
blockNumber = found // found an earlier block
}
}
}
}
func (node *Node) getSignerLastBlock(signer string, since int64, until int64) (blockNumber int64) {
if since < 0 {
return -1
}
var (
count int64 = 20
visited int64 = 0
found int64 = -1
)
// first, we look close to the last block
if blockNumber, visited = node.searchSnapshotBackward(until, signer, 0); blockNumber > 0 {
return
}
// next, we do a coarse search
until -= visited
for i := until - 10000; i > since && found == -1; i -= 10000 {
if found, _ = node.searchSnapshotBackward(i, signer, 0); found == -1 { // still not found
until = i
}
}
if found > 0 {
since = found
}
n := Min(10, (until-since)/count+1) // number of goroutines
ch := make(chan int64)
for i := int64(0); i < n; i++ {
go func() {
for blockNumber := <-ch; blockNumber > 0; blockNumber = <-ch {
cnt := Min(count, blockNumber-since+1)
if found, _ := node.searchSnapshotBackward(blockNumber, signer, cnt); found > 0 {
ch <- found
}
}
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}()
}
for {
select {
case ch <- until:
switch {
case until < 0:
continue
case until-count > since:
until -= count
default:
until = -1 //we have exhausted the search space
}
case found := <-ch:
switch {
case found < 0:
n-- // a goroutine has ended
if n == 0 { // all goroutines have ended
return
}
case blockNumber < 0:
blockNumber = found // first time we see this signer
until = -1 // Notify everyone
case found > blockNumber:
blockNumber = found // found a later block
}
}
}
}
func (node *Node) searchSnapshotForward(blockNumber int64, signer string, count int64) (found int64, visited int64) {
found = -1
if blockNumber+count < 1 {
return
}
for count > 0 {
snapshot := node.GetSnapshotAtBlock(blockNumber + count - 1)
recents := int64(len(snapshot.Recents))
visited += recents
count -= recents
for b, s := range snapshot.Recents {
found = int64(b)
}
}
}
return
}
func (node *Node) searchSnapshotBackward(blockNumber int64, signer string, count int64) (found int64, visited int64) {
found = -1
if blockNumber < 1 { // Genesis block has no signers
return
}
count = Min(count, blockNumber) // Never search below block 1
for {
snapshot := node.GetSnapshotAtBlock(blockNumber - visited)
visited += int64(len(snapshot.Recents))
if count == 0 {
count = Min(blockNumber, int64(2*len(snapshot.Signers)))
}
for b, s := range snapshot.Recents {
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found = int64(b)
return
}
}
if visited >= count {
return
}
}
}
func (node *Node) SealerInfo(sealer string) (info SealerInfo, err error) {
info.Address = sealer
info.CurrentBlock = node.blockNumber()
info.Since = node.GetSealerInception(sealer)
if info.Since == -1 {
return info, fmt.Errorf("%q is not a sealer", sealer)
}
info.FirstBlock = node.getSignerFirstBlock(sealer, info.Since+1, info.CurrentBlock)
info.LastBlock = node.getSignerLastBlock(sealer, info.FirstBlock, info.CurrentBlock)
return
}
client, err := rpc.Dial(url)
}
func (node *Node) Close() {
(*rpc.Client)(node).Close()
}