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core, consensus: pluggable consensus engines (#3817)

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This commit adds pluggable consensus engines to go-ethereum. In short, it
introduces a generic consensus interface, and refactors the entire codebase to
use this interface.
This commit is contained in:
Péter Szilágyi
2017-04-05 01:16:29 +03:00
committed by Felix Lange
parent e50a5b7771
commit 09777952ee
61 changed files with 1681 additions and 1426 deletions
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34
light/lightchain_test.go
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@ -23,12 +23,12 @@ import (
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
)
// So we can deterministically seed different blockchains
@ -49,18 +49,15 @@ func makeHeaderChain(parent *types.Header, n int, db ethdb.Database, seed int) [
return headers
}
func testChainConfig() *params.ChainConfig {
return &params.ChainConfig{HomesteadBlock: big.NewInt(0)}
}
// newCanonical creates a chain database, and injects a deterministic canonical
// chain. Depending on the full flag, if creates either a full block chain or a
// header only chain.
func newCanonical(n int) (ethdb.Database, *LightChain, error) {
db, _ := ethdb.NewMemDatabase()
gspec := core.Genesis{Config: testChainConfig()}
gspec := core.Genesis{Config: params.TestChainConfig}
genesis := gspec.MustCommit(db)
blockchain, _ := NewLightChain(&dummyOdr{db: db}, gspec.Config, pow.FakePow{}, new(event.TypeMux))
blockchain, _ := NewLightChain(&dummyOdr{db: db}, gspec.Config, ethash.NewFaker(), new(event.TypeMux))
// Create and inject the requested chain
if n == 0 {
return db, blockchain, nil
@ -76,14 +73,13 @@ func newTestLightChain() *LightChain {
db, _ := ethdb.NewMemDatabase()
gspec := &core.Genesis{
Difficulty: big.NewInt(1),
Config: testChainConfig(),
Config: params.TestChainConfig,
}
gspec.MustCommit(db)
lc, err := NewLightChain(&dummyOdr{db: db}, gspec.Config, pow.NewTestEthash(), new(event.TypeMux))
lc, err := NewLightChain(&dummyOdr{db: db}, gspec.Config, ethash.NewFullFaker(), new(event.TypeMux))
if err != nil {
panic(err)
}
lc.SetValidator(bproc{})
return lc
}
@ -130,17 +126,17 @@ func printChain(bc *LightChain) {
// testHeaderChainImport tries to process a chain of header, writing them into
// the database if successful.
func testHeaderChainImport(chain []*types.Header, LightChain *LightChain) error {
func testHeaderChainImport(chain []*types.Header, lightchain *LightChain) error {
for _, header := range chain {
// Try and validate the header
if err := LightChain.Validator().ValidateHeader(header, LightChain.GetHeaderByHash(header.ParentHash), false); err != nil {
if err := lightchain.engine.VerifyHeader(lightchain.hc, header, true); err != nil {
return err
}
// Manually insert the header into the database, but don't reorganize (allows subsequent testing)
LightChain.mu.Lock()
core.WriteTd(LightChain.chainDb, header.Hash(), header.Number.Uint64(), new(big.Int).Add(header.Difficulty, LightChain.GetTdByHash(header.ParentHash)))
core.WriteHeader(LightChain.chainDb, header)
LightChain.mu.Unlock()
lightchain.mu.Lock()
core.WriteTd(lightchain.chainDb, header.Hash(), header.Number.Uint64(), new(big.Int).Add(header.Difficulty, lightchain.GetTdByHash(header.ParentHash)))
core.WriteHeader(lightchain.chainDb, header)
lightchain.mu.Unlock()
}
return nil
}
@ -257,10 +253,6 @@ func TestBrokenHeaderChain(t *testing.T) {
}
}
type bproc struct{}
func (bproc) ValidateHeader(*types.Header, *types.Header, bool) error { return nil }
func makeHeaderChainWithDiff(genesis *types.Block, d []int, seed byte) []*types.Header {
var chain []*types.Header
for i, difficulty := range d {
@ -359,7 +351,7 @@ func TestReorgBadHeaderHashes(t *testing.T) {
defer func() { delete(core.BadHashes, headers[3].Hash()) }()
// Create a new LightChain and check that it rolled back the state.
ncm, err := NewLightChain(&dummyOdr{db: bc.chainDb}, testChainConfig(), pow.FakePow{}, new(event.TypeMux))
ncm, err := NewLightChain(&dummyOdr{db: bc.chainDb}, params.TestChainConfig, ethash.NewFaker(), new(event.TypeMux))
if err != nil {
t.Fatalf("failed to create new chain manager: %v", err)
}