406 lines
14 KiB
Go
406 lines
14 KiB
Go
// Copyright 2017 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package clique
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/ecdsa"
|
|
"math/big"
|
|
"testing"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
type testerVote struct {
|
|
signer string
|
|
voted string
|
|
auth bool
|
|
}
|
|
|
|
// testerAccountPool is a pool to maintain currently active tester accounts,
|
|
// mapped from textual names used in the tests below to actual Ethereum private
|
|
// keys capable of signing transactions.
|
|
type testerAccountPool struct {
|
|
accounts map[string]*ecdsa.PrivateKey
|
|
}
|
|
|
|
func newTesterAccountPool() *testerAccountPool {
|
|
return &testerAccountPool{
|
|
accounts: make(map[string]*ecdsa.PrivateKey),
|
|
}
|
|
}
|
|
|
|
func (ap *testerAccountPool) sign(header *types.Header, signer string) {
|
|
// Ensure we have a persistent key for the signer
|
|
if ap.accounts[signer] == nil {
|
|
ap.accounts[signer], _ = crypto.GenerateKey()
|
|
}
|
|
// Sign the header and embed the signature in extra data
|
|
sig, _ := crypto.Sign(sigHash(header).Bytes(), ap.accounts[signer])
|
|
copy(header.Extra[len(header.Extra)-65:], sig)
|
|
}
|
|
|
|
func (ap *testerAccountPool) address(account string) common.Address {
|
|
// Ensure we have a persistent key for the account
|
|
if ap.accounts[account] == nil {
|
|
ap.accounts[account], _ = crypto.GenerateKey()
|
|
}
|
|
// Resolve and return the Ethereum address
|
|
return crypto.PubkeyToAddress(ap.accounts[account].PublicKey)
|
|
}
|
|
|
|
// testerChainReader implements consensus.ChainReader to access the genesis
|
|
// block. All other methods and requests will panic.
|
|
type testerChainReader struct {
|
|
db ethdb.Database
|
|
}
|
|
|
|
func (r *testerChainReader) Config() *params.ChainConfig { panic("not supported") }
|
|
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)
|
|
}
|
|
panic("not supported")
|
|
}
|
|
|
|
// Tests that voting is evaluated correctly for various simple and complex scenarios.
|
|
func TestVoting(t *testing.T) {
|
|
// Define the various voting scenarios to test
|
|
tests := []struct {
|
|
epoch uint64
|
|
signers []string
|
|
votes []testerVote
|
|
results []string
|
|
}{
|
|
{
|
|
// Single signer, no votes cast
|
|
signers: []string{"A"},
|
|
votes: []testerVote{{signer: "A"}},
|
|
results: []string{"A"},
|
|
}, {
|
|
// Single signer, voting to add two others (only accept first, second needs 2 votes)
|
|
signers: []string{"A"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "B", auth: true},
|
|
{signer: "B"},
|
|
{signer: "A", voted: "C", auth: true},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Two signers, voting to add three others (only accept first two, third needs 3 votes already)
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: true},
|
|
{signer: "B", voted: "C", auth: true},
|
|
{signer: "A", voted: "D", auth: true},
|
|
{signer: "B", voted: "D", auth: true},
|
|
{signer: "C"},
|
|
{signer: "A", voted: "E", auth: true},
|
|
{signer: "B", voted: "E", auth: true},
|
|
},
|
|
results: []string{"A", "B", "C", "D"},
|
|
}, {
|
|
// Single signer, dropping itself (weird, but one less cornercase by explicitly allowing this)
|
|
signers: []string{"A"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "A", auth: false},
|
|
},
|
|
results: []string{},
|
|
}, {
|
|
// Two signers, actually needing mutual consent to drop either of them (not fulfilled)
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "B", auth: false},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Two signers, actually needing mutual consent to drop either of them (fulfilled)
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "B", auth: false},
|
|
{signer: "B", voted: "B", auth: false},
|
|
},
|
|
results: []string{"A"},
|
|
}, {
|
|
// Three signers, two of them deciding to drop the third
|
|
signers: []string{"A", "B", "C"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Four signers, consensus of two not being enough to drop anyone
|
|
signers: []string{"A", "B", "C", "D"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
},
|
|
results: []string{"A", "B", "C", "D"},
|
|
}, {
|
|
// Four signers, consensus of three already being enough to drop someone
|
|
signers: []string{"A", "B", "C", "D"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "D", auth: false},
|
|
{signer: "B", voted: "D", auth: false},
|
|
{signer: "C", voted: "D", auth: false},
|
|
},
|
|
results: []string{"A", "B", "C"},
|
|
}, {
|
|
// Authorizations are counted once per signer per target
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: true},
|
|
{signer: "B"},
|
|
{signer: "A", voted: "C", auth: true},
|
|
{signer: "B"},
|
|
{signer: "A", voted: "C", auth: true},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Authorizing multiple accounts concurrently is permitted
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: true},
|
|
{signer: "B"},
|
|
{signer: "A", voted: "D", auth: true},
|
|
{signer: "B"},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "D", auth: true},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "C", auth: true},
|
|
},
|
|
results: []string{"A", "B", "C", "D"},
|
|
}, {
|
|
// Deauthorizations are counted once per signer per target
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "B", auth: false},
|
|
{signer: "B"},
|
|
{signer: "A", voted: "B", auth: false},
|
|
{signer: "B"},
|
|
{signer: "A", voted: "B", auth: false},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Deauthorizing multiple accounts concurrently is permitted
|
|
signers: []string{"A", "B", "C", "D"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B"},
|
|
{signer: "C"},
|
|
{signer: "A", voted: "D", auth: false},
|
|
{signer: "B"},
|
|
{signer: "C"},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "D", auth: false},
|
|
{signer: "C", voted: "D", auth: false},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "C", auth: false},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Votes from deauthorized signers are discarded immediately (deauth votes)
|
|
signers: []string{"A", "B", "C"},
|
|
votes: []testerVote{
|
|
{signer: "C", voted: "B", auth: false},
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
{signer: "A", voted: "B", auth: false},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Votes from deauthorized signers are discarded immediately (auth votes)
|
|
signers: []string{"A", "B", "C"},
|
|
votes: []testerVote{
|
|
{signer: "C", voted: "B", auth: false},
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
{signer: "A", voted: "B", auth: false},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Cascading changes are not allowed, only the account being voted on may change
|
|
signers: []string{"A", "B", "C", "D"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B"},
|
|
{signer: "C"},
|
|
{signer: "A", voted: "D", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
{signer: "C"},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "D", auth: false},
|
|
{signer: "C", voted: "D", auth: false},
|
|
},
|
|
results: []string{"A", "B", "C"},
|
|
}, {
|
|
// Changes reaching consensus out of bounds (via a deauth) execute on touch
|
|
signers: []string{"A", "B", "C", "D"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B"},
|
|
{signer: "C"},
|
|
{signer: "A", voted: "D", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
{signer: "C"},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "D", auth: false},
|
|
{signer: "C", voted: "D", auth: false},
|
|
{signer: "A"},
|
|
{signer: "C", voted: "C", auth: true},
|
|
},
|
|
results: []string{"A", "B"},
|
|
}, {
|
|
// Changes reaching consensus out of bounds (via a deauth) may go out of consensus on first touch
|
|
signers: []string{"A", "B", "C", "D"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: false},
|
|
{signer: "B"},
|
|
{signer: "C"},
|
|
{signer: "A", voted: "D", auth: false},
|
|
{signer: "B", voted: "C", auth: false},
|
|
{signer: "C"},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "D", auth: false},
|
|
{signer: "C", voted: "D", auth: false},
|
|
{signer: "A"},
|
|
{signer: "B", voted: "C", auth: true},
|
|
},
|
|
results: []string{"A", "B", "C"},
|
|
}, {
|
|
// Ensure that pending votes don't survive authorization status changes. This
|
|
// corner case can only appear if a signer is quickly added, removed and then
|
|
// readded (or the inverse), while one of the original voters dropped. If a
|
|
// past vote is left cached in the system somewhere, this will interfere with
|
|
// the final signer outcome.
|
|
signers: []string{"A", "B", "C", "D", "E"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "F", auth: true}, // Authorize F, 3 votes needed
|
|
{signer: "B", voted: "F", auth: true},
|
|
{signer: "C", voted: "F", auth: true},
|
|
{signer: "D", voted: "F", auth: false}, // Deauthorize F, 4 votes needed (leave A's previous vote "unchanged")
|
|
{signer: "E", voted: "F", auth: false},
|
|
{signer: "B", voted: "F", auth: false},
|
|
{signer: "C", voted: "F", auth: false},
|
|
{signer: "D", voted: "F", auth: true}, // Almost authorize F, 2/3 votes needed
|
|
{signer: "E", voted: "F", auth: true},
|
|
{signer: "B", voted: "A", auth: false}, // Deauthorize A, 3 votes needed
|
|
{signer: "C", voted: "A", auth: false},
|
|
{signer: "D", voted: "A", auth: false},
|
|
{signer: "B", voted: "F", auth: true}, // Finish authorizing F, 3/3 votes needed
|
|
},
|
|
results: []string{"B", "C", "D", "E", "F"},
|
|
}, {
|
|
// Epoch transitions reset all votes to allow chain checkpointing
|
|
epoch: 3,
|
|
signers: []string{"A", "B"},
|
|
votes: []testerVote{
|
|
{signer: "A", voted: "C", auth: true},
|
|
{signer: "B"},
|
|
{signer: "A"}, // Checkpoint block, (don't vote here, it's validated outside of snapshots)
|
|
{signer: "B", voted: "C", auth: true},
|
|
},
|
|
results: []string{"A", "B"},
|
|
},
|
|
}
|
|
// Run through the scenarios and test them
|
|
for i, tt := range tests {
|
|
// Create the account pool and generate the initial set of signers
|
|
accounts := newTesterAccountPool()
|
|
|
|
signers := make([]common.Address, len(tt.signers))
|
|
for j, signer := range tt.signers {
|
|
signers[j] = accounts.address(signer)
|
|
}
|
|
for j := 0; j < len(signers); j++ {
|
|
for k := j + 1; k < len(signers); k++ {
|
|
if bytes.Compare(signers[j][:], signers[k][:]) > 0 {
|
|
signers[j], signers[k] = signers[k], signers[j]
|
|
}
|
|
}
|
|
}
|
|
// Create the genesis block with the initial set of signers
|
|
genesis := &core.Genesis{
|
|
ExtraData: make([]byte, extraVanity+common.AddressLength*len(signers)+extraSeal),
|
|
}
|
|
for j, signer := range signers {
|
|
copy(genesis.ExtraData[extraVanity+j*common.AddressLength:], signer[:])
|
|
}
|
|
// Create a pristine blockchain with the genesis injected
|
|
db, _ := ethdb.NewMemDatabase()
|
|
genesis.Commit(db)
|
|
|
|
// Assemble a chain of headers from the cast votes
|
|
headers := make([]*types.Header, len(tt.votes))
|
|
for j, vote := range tt.votes {
|
|
headers[j] = &types.Header{
|
|
Number: big.NewInt(int64(j) + 1),
|
|
Time: big.NewInt(int64(j) * int64(blockPeriod)),
|
|
Coinbase: accounts.address(vote.voted),
|
|
Extra: make([]byte, extraVanity+extraSeal),
|
|
}
|
|
if j > 0 {
|
|
headers[j].ParentHash = headers[j-1].Hash()
|
|
}
|
|
if vote.auth {
|
|
copy(headers[j].Nonce[:], nonceAuthVote)
|
|
}
|
|
accounts.sign(headers[j], vote.signer)
|
|
}
|
|
// Pass all the headers through clique and ensure tallying succeeds
|
|
head := headers[len(headers)-1]
|
|
|
|
snap, err := New(¶ms.CliqueConfig{Epoch: tt.epoch}, db).snapshot(&testerChainReader{db: db}, head.Number.Uint64(), head.Hash(), headers)
|
|
if err != nil {
|
|
t.Errorf("test %d: failed to create voting snapshot: %v", i, err)
|
|
continue
|
|
}
|
|
// Verify the final list of signers against the expected ones
|
|
signers = make([]common.Address, len(tt.results))
|
|
for j, signer := range tt.results {
|
|
signers[j] = accounts.address(signer)
|
|
}
|
|
for j := 0; j < len(signers); j++ {
|
|
for k := j + 1; k < len(signers); k++ {
|
|
if bytes.Compare(signers[j][:], signers[k][:]) > 0 {
|
|
signers[j], signers[k] = signers[k], signers[j]
|
|
}
|
|
}
|
|
}
|
|
result := snap.signers()
|
|
if len(result) != len(signers) {
|
|
t.Errorf("test %d: signers mismatch: have %x, want %x", i, result, signers)
|
|
continue
|
|
}
|
|
for j := 0; j < len(result); j++ {
|
|
if !bytes.Equal(result[j][:], signers[j][:]) {
|
|
t.Errorf("test %d, signer %d: signer mismatch: have %x, want %x", i, j, result[j], signers[j])
|
|
}
|
|
}
|
|
}
|
|
}
|