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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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13
core/chain_makers.go
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@ -21,13 +21,14 @@ import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/consensus/misc"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"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
@ -141,7 +142,7 @@ func (b *BlockGen) OffsetTime(seconds int64) {
if b.header.Time.Cmp(b.parent.Header().Time) <= 0 {
panic("block time out of range")
}
b.header.Difficulty = CalcDifficulty(b.config, b.header.Time.Uint64(), b.parent.Time().Uint64(), b.parent.Number(), b.parent.Difficulty())
b.header.Difficulty = ethash.CalcDifficulty(b.config, b.header.Time.Uint64(), b.parent.Time().Uint64(), b.parent.Number(), b.parent.Difficulty())
}
// GenerateChain creates a chain of n blocks. The first block's
@ -173,13 +174,13 @@ func GenerateChain(config *params.ChainConfig, parent *types.Block, db ethdb.Dat
}
}
if config.DAOForkSupport && config.DAOForkBlock != nil && config.DAOForkBlock.Cmp(h.Number) == 0 {
ApplyDAOHardFork(statedb)
misc.ApplyDAOHardFork(statedb)
}
// Execute any user modifications to the block and finalize it
if gen != nil {
gen(i, b)
}
AccumulateRewards(statedb, h, b.uncles)
ethash.AccumulateRewards(statedb, h, b.uncles)
root, err := statedb.Commit(config.IsEIP158(h.Number))
if err != nil {
panic(fmt.Sprintf("state write error: %v", err))
@ -212,7 +213,7 @@ func makeHeader(config *params.ChainConfig, parent *types.Block, state *state.St
Root: state.IntermediateRoot(config.IsEIP158(parent.Number())),
ParentHash: parent.Hash(),
Coinbase: parent.Coinbase(),
Difficulty: CalcDifficulty(config, time.Uint64(), new(big.Int).Sub(time, big.NewInt(10)).Uint64(), parent.Number(), parent.Difficulty()),
Difficulty: ethash.CalcDifficulty(config, time.Uint64(), new(big.Int).Sub(time, big.NewInt(10)).Uint64(), parent.Number(), parent.Difficulty()),
GasLimit: CalcGasLimit(parent),
GasUsed: new(big.Int),
Number: new(big.Int).Add(parent.Number(), common.Big1),
@ -229,7 +230,7 @@ func newCanonical(n int, full bool) (ethdb.Database, *BlockChain, error) {
db, _ := ethdb.NewMemDatabase()
genesis := gspec.MustCommit(db)
blockchain, _ := NewBlockChain(db, params.AllProtocolChanges, pow.FakePow{}, new(event.TypeMux), vm.Config{})
blockchain, _ := NewBlockChain(db, params.AllProtocolChanges, ethash.NewFaker(), new(event.TypeMux), vm.Config{})
// Create and inject the requested chain
if n == 0 {
return db, blockchain, nil