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consensus/clique, internal/web3ext: support hash based API queries (#14321)

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* consensus/clique, internal/web3ext: support hash based API queries

* consensus/clique: make RPC return types public
This commit is contained in:
Péter Szilágyi
2017-04-12 15:37:10 +03:00
committed by GitHub
parent 050ceff1ae
commit 6b7ae4e751
6 changed files with 66 additions and 32 deletions
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24
consensus/clique/api.go
View File

@ -31,7 +31,7 @@ type API struct {
}
// GetSnapshot retrieves the state snapshot at a given block.
func (api *API) GetSnapshot(number *rpc.BlockNumber) (interface{}, error) {
func (api *API) GetSnapshot(number *rpc.BlockNumber) (*Snapshot, error) {
// Retrieve the requested block number (or current if none requested)
var header *types.Header
if number == nil || *number == rpc.LatestBlockNumber {
@ -46,6 +46,15 @@ func (api *API) GetSnapshot(number *rpc.BlockNumber) (interface{}, error) {
return api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
}
// GetSnapshotAtHash retrieves the state snapshot at a given block.
func (api *API) GetSnapshotAtHash(hash common.Hash) (*Snapshot, error) {
header := api.chain.GetHeaderByHash(hash)
if header == nil {
return nil, errUnknownBlock
}
return api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
}
// GetSigners retrieves the list of authorized signers at the specified block.
func (api *API) GetSigners(number *rpc.BlockNumber) ([]common.Address, error) {
// Retrieve the requested block number (or current if none requested)
@ -66,6 +75,19 @@ func (api *API) GetSigners(number *rpc.BlockNumber) ([]common.Address, error) {
return snap.signers(), nil
}
// GetSignersAtHash retrieves the state snapshot at a given block.
func (api *API) GetSignersAtHash(hash common.Hash) ([]common.Address, error) {
header := api.chain.GetHeaderByHash(hash)
if header == nil {
return nil, errUnknownBlock
}
snap, err := api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
if err != nil {
return nil, err
}
return snap.signers(), nil
}
// Proposals returns the current proposals the node tries to uphold and vote on.
func (api *API) Proposals() map[common.Address]bool {
api.clique.lock.RLock()

6
consensus/clique/clique.go
View File

@ -349,16 +349,16 @@ func (c *Clique) verifyCascadingFields(chain consensus.ChainReader, header *type
}
// snapshot retrieves the authorization snapshot at a given point in time.
func (c *Clique) snapshot(chain consensus.ChainReader, number uint64, hash common.Hash, parents []*types.Header) (*snapshot, error) {
func (c *Clique) snapshot(chain consensus.ChainReader, number uint64, hash common.Hash, parents []*types.Header) (*Snapshot, error) {
// Search for a snapshot in memory or on disk for checkpoints
var (
headers []*types.Header
snap *snapshot
snap *Snapshot
)
for snap == nil {
// If an in-memory snapshot was found, use that
if s, ok := c.recents.Get(hash); ok {
snap = s.(*snapshot)
snap = s.(*Snapshot)
break
}
// If an on-disk checkpoint snapshot can be found, use that

52
consensus/clique/snapshot.go
View File

@ -26,45 +26,45 @@ import (
"github.com/ethereum/go-ethereum/params"
)
// vote represents a single vote that an authorized signer made to modify the
// Vote represents a single vote that an authorized signer made to modify the
// list of authorizations.
type vote struct {
type Vote struct {
Signer common.Address `json:"signer"` // Authorized signer that cast this vote
Block uint64 `json:"block"` // Block number the vote was cast in (expire old votes)
Address common.Address `json:"address"` // Account being voted on to change its authorization
Authorize bool `json:"authorize"` // Whether to authorize or deauthorize the voted account
}
// tally is a simple vote tally to keep the current score of votes. Votes that
// Tally is a simple vote tally to keep the current score of votes. Votes that
// go against the proposal aren't counted since it's equivalent to not voting.
type tally struct {
type Tally struct {
Authorize bool `json:"authorize"` // Whether the vote it about authorizing or kicking someone
Votes int `json:"votes"` // Number of votes until now wanting to pass the proposal
}
// snapshot is the state of the authorization voting at a given point in time.
type snapshot struct {
// Snapshot is the state of the authorization voting at a given point in time.
type Snapshot struct {
config *params.CliqueConfig // Consensus engine parameters to fine tune behavior
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 []*vote `json:"votes"` // List of votes cast in chronological order
Tally map[common.Address]tally `json:"tally"` // Current vote tally to avoid recalculating
Votes []*Vote `json:"votes"` // List of votes cast in chronological order
Tally map[common.Address]Tally `json:"tally"` // Current vote tally to avoid recalculating
}
// newSnapshot create a new snapshot with the specified startup parameters. This
// method does not initialize the set of recent signers, so only ever use if for
// the genesis block.
func newSnapshot(config *params.CliqueConfig, number uint64, hash common.Hash, signers []common.Address) *snapshot {
snap := &snapshot{
func newSnapshot(config *params.CliqueConfig, number uint64, hash common.Hash, signers []common.Address) *Snapshot {
snap := &Snapshot{
config: config,
Number: number,
Hash: hash,
Signers: make(map[common.Address]struct{}),
Recents: make(map[uint64]common.Address),
Tally: make(map[common.Address]tally),
Tally: make(map[common.Address]Tally),
}
for _, signer := range signers {
snap.Signers[signer] = struct{}{}
@ -73,12 +73,12 @@ func newSnapshot(config *params.CliqueConfig, number uint64, hash common.Hash, s
}
// loadSnapshot loads an existing snapshot from the database.
func loadSnapshot(config *params.CliqueConfig, db ethdb.Database, hash common.Hash) (*snapshot, error) {
func loadSnapshot(config *params.CliqueConfig, db ethdb.Database, hash common.Hash) (*Snapshot, error) {
blob, err := db.Get(append([]byte("clique-"), hash[:]...))
if err != nil {
return nil, err
}
snap := new(snapshot)
snap := new(Snapshot)
if err := json.Unmarshal(blob, snap); err != nil {
return nil, err
}
@ -88,7 +88,7 @@ func loadSnapshot(config *params.CliqueConfig, db ethdb.Database, hash common.Ha
}
// store inserts the snapshot into the database.
func (s *snapshot) store(db ethdb.Database) error {
func (s *Snapshot) store(db ethdb.Database) error {
blob, err := json.Marshal(s)
if err != nil {
return err
@ -97,15 +97,15 @@ func (s *snapshot) store(db ethdb.Database) error {
}
// copy creates a deep copy of the snapshot, though not the individual votes.
func (s *snapshot) copy() *snapshot {
cpy := &snapshot{
func (s *Snapshot) copy() *Snapshot {
cpy := &Snapshot{
config: s.config,
Number: s.Number,
Hash: s.Hash,
Signers: make(map[common.Address]struct{}),
Recents: make(map[uint64]common.Address),
Votes: make([]*vote, len(s.Votes)),
Tally: make(map[common.Address]tally),
Votes: make([]*Vote, len(s.Votes)),
Tally: make(map[common.Address]Tally),
}
for signer := range s.Signers {
cpy.Signers[signer] = struct{}{}
@ -122,7 +122,7 @@ func (s *snapshot) copy() *snapshot {
}
// cast adds a new vote into the tally.
func (s *snapshot) cast(address common.Address, authorize bool) bool {
func (s *Snapshot) cast(address common.Address, authorize bool) bool {
// Ensure the vote is meaningful
_, signer := s.Signers[address]
if (signer && authorize) || (!signer && !authorize) {
@ -133,13 +133,13 @@ func (s *snapshot) cast(address common.Address, authorize bool) bool {
old.Votes++
s.Tally[address] = old
} else {
s.Tally[address] = tally{Authorize: authorize, Votes: 1}
s.Tally[address] = Tally{Authorize: authorize, Votes: 1}
}
return true
}
// uncast removes a previously cast vote from the tally.
func (s *snapshot) uncast(address common.Address, authorize bool) bool {
func (s *Snapshot) uncast(address common.Address, authorize bool) bool {
// If there's no tally, it's a dangling vote, just drop
tally, ok := s.Tally[address]
if !ok {
@ -161,7 +161,7 @@ func (s *snapshot) uncast(address common.Address, authorize bool) bool {
// apply creates a new authorization snapshot by applying the given headers to
// the original one.
func (s *snapshot) apply(headers []*types.Header) (*snapshot, error) {
func (s *Snapshot) apply(headers []*types.Header) (*Snapshot, error) {
// Allow passing in no headers for cleaner code
if len(headers) == 0 {
return s, nil
@ -183,7 +183,7 @@ func (s *snapshot) apply(headers []*types.Header) (*snapshot, error) {
number := header.Number.Uint64()
if number%s.config.Epoch == 0 {
snap.Votes = nil
snap.Tally = make(map[common.Address]tally)
snap.Tally = make(map[common.Address]Tally)
}
// Delete the oldest signer from the recent list to allow it signing again
if limit := uint64(len(snap.Signers)/2 + 1); number >= limit {
@ -226,7 +226,7 @@ func (s *snapshot) apply(headers []*types.Header) (*snapshot, error) {
return nil, errInvalidVote
}
if snap.cast(header.Coinbase, authorize) {
snap.Votes = append(snap.Votes, &vote{
snap.Votes = append(snap.Votes, &Vote{
Signer: signer,
Block: number,
Address: header.Coinbase,
@ -274,7 +274,7 @@ func (s *snapshot) apply(headers []*types.Header) (*snapshot, error) {
}
// signers retrieves the list of authorized signers in ascending order.
func (s *snapshot) signers() []common.Address {
func (s *Snapshot) signers() []common.Address {
signers := make([]common.Address, 0, len(s.Signers))
for signer := range s.Signers {
signers = append(signers, signer)
@ -290,7 +290,7 @@ func (s *snapshot) signers() []common.Address {
}
// inturn returns if a signer at a given block height is in-turn or not.
func (s *snapshot) inturn(number uint64, signer common.Address) bool {
func (s *Snapshot) inturn(number uint64, signer common.Address) bool {
signers, offset := s.signers(), 0
for offset < len(signers) && signers[offset] != signer {
offset++

1
consensus/clique/snapshot_test.go
View File

@ -78,6 +78,7 @@ func (r *testerChainReader) Config() *params.ChainConfig { panic
func (r *testerChainReader) CurrentHeader() *types.Header { panic("not supported") }
func (r *testerChainReader) GetHeader(common.Hash, uint64) *types.Header { panic("not supported") }
func (r *testerChainReader) GetBlock(common.Hash, uint64) *types.Block { panic("not supported") }
func (r *testerChainReader) GetHeaderByHash(common.Hash) *types.Header { panic("not supported") }
func (r *testerChainReader) GetHeaderByNumber(number uint64) *types.Header {
if number == 0 {
return core.GetHeader(r.db, core.GetCanonicalHash(r.db, 0), 0)

3
consensus/consensus.go
View File

@ -40,6 +40,9 @@ type ChainReader interface {
// GetHeaderByNumber retrieves a block header from the database by number.
GetHeaderByNumber(number uint64) *types.Header
// GetHeaderByHash retrieves a block header from the database by its hash.
GetHeaderByHash(hash common.Hash) *types.Header
// GetBlock retrieves a block from the database by hash and number.
GetBlock(hash common.Hash, number uint64) *types.Block
}