forked from cerc-io/plugeth
236 lines
7.1 KiB
Go
236 lines
7.1 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package clique
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import (
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"encoding/json"
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/rpc"
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)
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// API is a user facing RPC API to allow controlling the signer and voting
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// mechanisms of the proof-of-authority scheme.
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type API struct {
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chain consensus.ChainHeaderReader
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clique *Clique
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}
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// GetSnapshot retrieves the state snapshot at a given block.
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func (api *API) GetSnapshot(number *rpc.BlockNumber) (*Snapshot, error) {
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// Retrieve the requested block number (or current if none requested)
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var header *types.Header
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if number == nil || *number == rpc.LatestBlockNumber {
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header = api.chain.CurrentHeader()
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} else {
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header = api.chain.GetHeaderByNumber(uint64(number.Int64()))
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}
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// Ensure we have an actually valid block and return its snapshot
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if header == nil {
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return nil, errUnknownBlock
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}
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return api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
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}
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// GetSnapshotAtHash retrieves the state snapshot at a given block.
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func (api *API) GetSnapshotAtHash(hash common.Hash) (*Snapshot, error) {
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header := api.chain.GetHeaderByHash(hash)
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if header == nil {
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return nil, errUnknownBlock
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}
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return api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
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}
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// GetSigners retrieves the list of authorized signers at the specified block.
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func (api *API) GetSigners(number *rpc.BlockNumber) ([]common.Address, error) {
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// Retrieve the requested block number (or current if none requested)
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var header *types.Header
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if number == nil || *number == rpc.LatestBlockNumber {
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header = api.chain.CurrentHeader()
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} else {
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header = api.chain.GetHeaderByNumber(uint64(number.Int64()))
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}
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// Ensure we have an actually valid block and return the signers from its snapshot
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if header == nil {
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return nil, errUnknownBlock
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}
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snap, err := api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
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if err != nil {
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return nil, err
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}
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return snap.signers(), nil
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}
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// GetSignersAtHash retrieves the list of authorized signers at the specified block.
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func (api *API) GetSignersAtHash(hash common.Hash) ([]common.Address, error) {
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header := api.chain.GetHeaderByHash(hash)
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if header == nil {
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return nil, errUnknownBlock
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}
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snap, err := api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
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if err != nil {
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return nil, err
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}
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return snap.signers(), nil
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}
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// Proposals returns the current proposals the node tries to uphold and vote on.
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func (api *API) Proposals() map[common.Address]bool {
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api.clique.lock.RLock()
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defer api.clique.lock.RUnlock()
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proposals := make(map[common.Address]bool)
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for address, auth := range api.clique.proposals {
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proposals[address] = auth
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}
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return proposals
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}
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// Propose injects a new authorization proposal that the signer will attempt to
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// push through.
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func (api *API) Propose(address common.Address, auth bool) {
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api.clique.lock.Lock()
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defer api.clique.lock.Unlock()
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api.clique.proposals[address] = auth
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}
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// Discard drops a currently running proposal, stopping the signer from casting
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// further votes (either for or against).
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func (api *API) Discard(address common.Address) {
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api.clique.lock.Lock()
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defer api.clique.lock.Unlock()
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delete(api.clique.proposals, address)
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}
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type status struct {
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InturnPercent float64 `json:"inturnPercent"`
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SigningStatus map[common.Address]int `json:"sealerActivity"`
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NumBlocks uint64 `json:"numBlocks"`
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}
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// Status returns the status of the last N blocks,
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// - the number of active signers,
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// - the number of signers,
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// - the percentage of in-turn blocks
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func (api *API) Status() (*status, error) {
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var (
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numBlocks = uint64(64)
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header = api.chain.CurrentHeader()
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diff = uint64(0)
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optimals = 0
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)
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snap, err := api.clique.snapshot(api.chain, header.Number.Uint64(), header.Hash(), nil)
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if err != nil {
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return nil, err
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}
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var (
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signers = snap.signers()
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end = header.Number.Uint64()
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start = end - numBlocks
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)
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if numBlocks > end {
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start = 1
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numBlocks = end - start
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}
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signStatus := make(map[common.Address]int)
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for _, s := range signers {
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signStatus[s] = 0
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}
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for n := start; n < end; n++ {
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h := api.chain.GetHeaderByNumber(n)
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if h == nil {
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return nil, fmt.Errorf("missing block %d", n)
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}
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if h.Difficulty.Cmp(diffInTurn) == 0 {
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optimals++
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}
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diff += h.Difficulty.Uint64()
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sealer, err := api.clique.Author(h)
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if err != nil {
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return nil, err
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}
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signStatus[sealer]++
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}
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return &status{
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InturnPercent: float64(100*optimals) / float64(numBlocks),
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SigningStatus: signStatus,
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NumBlocks: numBlocks,
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}, nil
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}
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type blockNumberOrHashOrRLP struct {
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*rpc.BlockNumberOrHash
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RLP hexutil.Bytes `json:"rlp,omitempty"`
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}
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func (sb *blockNumberOrHashOrRLP) UnmarshalJSON(data []byte) error {
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bnOrHash := new(rpc.BlockNumberOrHash)
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// Try to unmarshal bNrOrHash
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if err := bnOrHash.UnmarshalJSON(data); err == nil {
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sb.BlockNumberOrHash = bnOrHash
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return nil
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}
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// Try to unmarshal RLP
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var input string
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if err := json.Unmarshal(data, &input); err != nil {
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return err
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}
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blob, err := hexutil.Decode(input)
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if err != nil {
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return err
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}
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sb.RLP = blob
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return nil
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}
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// GetSigner returns the signer for a specific clique block.
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// Can be called with either a blocknumber, blockhash or an rlp encoded blob.
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// The RLP encoded blob can either be a block or a header.
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func (api *API) GetSigner(rlpOrBlockNr *blockNumberOrHashOrRLP) (common.Address, error) {
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if len(rlpOrBlockNr.RLP) == 0 {
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blockNrOrHash := rlpOrBlockNr.BlockNumberOrHash
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var header *types.Header
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if blockNrOrHash == nil {
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header = api.chain.CurrentHeader()
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} else if hash, ok := blockNrOrHash.Hash(); ok {
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header = api.chain.GetHeaderByHash(hash)
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} else if number, ok := blockNrOrHash.Number(); ok {
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header = api.chain.GetHeaderByNumber(uint64(number.Int64()))
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}
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if header == nil {
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return common.Address{}, fmt.Errorf("missing block %v", blockNrOrHash.String())
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}
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return api.clique.Author(header)
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}
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block := new(types.Block)
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if err := rlp.DecodeBytes(rlpOrBlockNr.RLP, block); err == nil {
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return api.clique.Author(block.Header())
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}
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header := new(types.Header)
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if err := rlp.DecodeBytes(rlpOrBlockNr.RLP, header); err != nil {
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return common.Address{}, err
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}
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return api.clique.Author(header)
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}
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