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package main
import (
"crypto/rand"
"fmt"
"github.com/ava-labs/coreth"
"github.com/ava-labs/coreth/core"
"github.com/ava-labs/coreth/core/types"
"github.com/ava-labs/coreth/eth"
"github.com/ava-labs/coreth/params"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
"math/big"
"sync"
)
func checkError(err error) {
if err != nil {
panic(err)
}
}
type TestChain struct {
hasBlock map[common.Hash]struct{}
blocks []common.Hash
blkCount uint32
chain *coreth.ETHChain
parentBlock common.Hash
outBlockCh chan<- []byte
blockWait sync.WaitGroup
}
func (tc *TestChain) insertBlock(block *types.Block) {
if _, ok := tc.hasBlock[block.Hash()]; !ok {
tc.hasBlock[block.Hash()] = struct{}{}
tc.blocks = append(tc.blocks, block.Hash())
}
}
func NewTestChain(name string, config *eth.Config,
inBlockCh <-chan []byte, outBlockCh chan<- []byte,
inAckCh <-chan struct{}, outAckCh chan<- struct{}) *TestChain {
tc := &TestChain{
hasBlock: make(map[common.Hash]struct{}),
blocks: make([]common.Hash, 0),
blkCount: 0,
chain: coreth.NewETHChain(config, nil, nil, nil),
outBlockCh: outBlockCh,
}
tc.insertBlock(tc.chain.GetGenesisBlock())
tc.chain.SetOnHeaderNew(func(header *types.Header) {
hid := make([]byte, 32)
_, err := rand.Read(hid)
if err != nil {
panic("cannot generate hid")
}
header.Extra = append(header.Extra, hid...)
})
tc.chain.SetOnSealFinish(func(block *types.Block) error {
blkID := tc.blkCount
tc.blkCount++
if len(block.Uncles()) != 0 {
panic("#uncles should be zero")
}
if tc.parentBlock != block.ParentHash() {
panic("mismatching parent hash")
}
log.Info(fmt.Sprintf("%s: create %s <= (%d = %s)",
name, tc.parentBlock.Hex(), blkID, block.Hash().Hex()))
tc.insertBlock(block)
if tc.outBlockCh != nil {
serialized, err := rlp.EncodeToBytes(block)
if err != nil {
panic(err)
}
tc.outBlockCh <- serialized
<-inAckCh
log.Info(fmt.Sprintf("%s: got ack", name))
}
tc.blockWait.Done()
return nil
})
go func() {
for {
select {
case serialized := <-inBlockCh:
block := new(types.Block)
err := rlp.DecodeBytes(serialized, block)
if err != nil {
panic(err)
}
if !tc.chain.VerifyBlock(block) {
panic("invalid block")
}
tc.chain.InsertChain([]*types.Block{block})
tc.insertBlock(block)
log.Info(fmt.Sprintf("%s: got block %s, sending ack", name, block.Hash().Hex()))
outAckCh <- struct{}{}
}
}
}()
return tc
}
func (tc *TestChain) Start() {
tc.chain.Start()
}
func (tc *TestChain) Stop() {
tc.chain.Stop()
}
func (tc *TestChain) GenRandomTree(n int, max int) {
for i := 0; i < n; i++ {
nblocks := len(tc.blocks)
m := max
if m < 0 || nblocks < m {
m = nblocks
}
pb, _ := rand.Int(rand.Reader, big.NewInt((int64)(m)))
pn := pb.Int64()
tc.parentBlock = tc.blocks[nblocks-1-(int)(pn)]
tc.chain.SetTail(tc.parentBlock)
tc.blockWait.Add(1)
tc.chain.GenBlock()
tc.blockWait.Wait()
}
}
func run(config *eth.Config, a1, a2, b1, b2 int) {
aliceBlk := make(chan []byte)
bobBlk := make(chan []byte)
aliceAck := make(chan struct{})
bobAck := make(chan struct{})
alice := NewTestChain("alice", config, bobBlk, aliceBlk, bobAck, aliceAck)
bob := NewTestChain("bob", config, aliceBlk, bobBlk, aliceAck, bobAck)
alice.Start()
bob.Start()
log.Info("alice genesis", "block", alice.chain.GetGenesisBlock().Hash().Hex())
log.Info("bob genesis", "block", bob.chain.GetGenesisBlock().Hash().Hex())
alice.GenRandomTree(a1, a2)
log.Info("alice finished generating the tree")
//time.Sleep(1 * time.Second)
bob.outBlockCh = nil
bob.GenRandomTree(b1, b2)
//mrand.Shuffle(len(bob.blocks),
// func(i, j int) { bob.blocks[i], bob.blocks[j] = bob.blocks[j], bob.blocks[i] })
log.Info("bob finished generating the tree")
//time.Sleep(1 * time.Second)
log.Info("bob sends out all its blocks")
for i := range bob.blocks {
serialized, err := rlp.EncodeToBytes(bob.chain.GetBlockByHash(bob.blocks[i]))
if err != nil {
panic(err)
}
bobBlk <- serialized
<-aliceAck
log.Info(fmt.Sprintf("bob: got ack"))
}
log.Info("bob finished generating the tree")
//time.Sleep(1 * time.Second)
log.Info("comparing two trees")
if len(alice.blocks) != len(bob.blocks) {
panic(fmt.Sprintf("mismatching tree size %d != %d", len(alice.blocks), len(bob.blocks)))
}
gn := big.NewInt(0)
for i := range alice.blocks {
ablk := alice.chain.GetBlockByHash(alice.blocks[i])
bblk := bob.chain.GetBlockByHash(alice.blocks[i])
for ablk.Number().Cmp(gn) > 0 && bblk.Number().Cmp(gn) > 0 {
result := ablk.Hash() == bblk.Hash()
opsign := "=="
if !result {
opsign = "!="
}
log.Info(fmt.Sprintf("alice(%d = %s) %s bob (%d = %s)",
ablk.Number(), ablk.Hash().Hex(),
opsign,
bblk.Number(), bblk.Hash().Hex()))
if !result {
panic("mismatching path")
}
ablk = alice.chain.GetBlockByHash(ablk.ParentHash())
bblk = bob.chain.GetBlockByHash(bblk.ParentHash())
}
log.Info(fmt.Sprintf("%s ok", alice.blocks[i].Hex()))
}
alice.Stop()
bob.Stop()
}
func main() {
// configure the chain
config := eth.DefaultConfig
config.ManualCanonical = true
chainConfig := ¶ms.ChainConfig{
ChainID: big.NewInt(1),
HomesteadBlock: big.NewInt(0),
DAOForkBlock: big.NewInt(0),
DAOForkSupport: true,
EIP150Block: big.NewInt(0),
EIP150Hash: common.HexToHash("0x2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0"),
EIP155Block: big.NewInt(0),
EIP158Block: big.NewInt(0),
ByzantiumBlock: big.NewInt(0),
ConstantinopleBlock: big.NewInt(0),
PetersburgBlock: big.NewInt(0),
IstanbulBlock: big.NewInt(0),
Ethash: nil,
}
// configure the genesis block
genBalance := big.NewInt(100000000000000000)
genKey, _ := coreth.NewKey(rand.Reader)
config.Genesis = &core.Genesis{
Config: chainConfig,
Nonce: 0,
Number: 0,
ExtraData: hexutil.MustDecode("0x00"),
GasLimit: 100000000,
Difficulty: big.NewInt(0),
Alloc: core.GenesisAlloc{genKey.Address: {Balance: genBalance}},
}
// grab the control of block generation and disable auto uncle
config.Miner.ManualMining = true
config.Miner.DisableUncle = true
run(&config, 60, 1, 60, 1)
run(&config, 500, 10, 500, 5)
}
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