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blockchain_test.go
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blockchain_test.go
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package bitcoincash
import (
"bytes"
"encoding/hex"
"github.com/gcash/bchd/blockchain"
"github.com/gcash/bchd/chaincfg"
"github.com/gcash/bchd/chaincfg/chainhash"
"github.com/gcash/bchd/wire"
"math/big"
"os"
"testing"
"time"
)
// New chain starting from regtest genesis
var chain = []string{
"0000002006226e46111a0b59caaf126043eb5bbf28c34f3a5e332a1fc7b2b73cf188910fc3ed4523bf94fc1fa184bee85af604c9ebeea6b39b498f62703fd3f03e7475534658d158ffff7f2001000000",
"000000207c3d2d417ff34a46f4f11a972d8e32bc98b300112dd4d9a1dae9ff87468eae136b90f1757adfab2056d693160b417b8f87a65c2c0735a47e63768f26473905506059d158ffff7f2003000000",
"000000200c6ea2eaf928b2d5d080c2f36dac1185865db1289c7339834b98e8034e4274073ed977491ebe6f9c0e01f5796e36ed66bf4e410bbbc2635129d6e0ecfc1897908459d158ffff7f2001000000",
"000000202e1569563ff6463f65bb7669b35fb9dd95ba0b251e30251b9877d9578b8700680337ff38b71d9667190c99e8fae337ba8c9c40cbd2c4678ba71d81cf6d3a1aa2ac59d158ffff7f2001000000",
"000000204525edcccf706e3769a54c8772934f291d6810315a26c177862c66feb9f3896e090c84be811cfdfed6da043cb337fccecff95fc73810ca82adb3d032b5d49140c759d158ffff7f2000000000",
"00000020ada1a9efa81df10d7b430e2fd5f3b085180c91b0e9b0f6e9af2d9b733544015eab404ef503e538909a04a419499133af9bcee47fcfc84baaab5344f77ebd455dec59d158ffff7f2000000000",
"000000204fdcb9ca4cc47ae7485bfc2f8adcbd515b1ee0cb724d343c91f02b6ec5a0ba507dddd2639fc1bd522489a2c2f2b681a60c6c7939490458dc1c008f3217cb47d6035ad158ffff7f2001000000",
"0000002019dbc9a6cec93be207053e4dfbc63af20c3cedba68f890c5a90f27aeb2ecc73386692b64e16ea4b87fc877cb3762394d12b597a0ca8d5efb2ea2c6e163f9e4c8225ad158ffff7f2000000000",
"000000203afc4a1c100fe3e21fa24ef92857613bb00890564e3529623780bc8d4a86d15cfd35aef39950dc53c348b5013f4ee3d94afc16745d6b3c8a9e6acfb8a2641c6f3e5ad158ffff7f2000000000",
"000000200e1b58feab56f9fe5ed7484a8c7bfecdb270da528db7a805d18208891bde3726a5ccb0a073d0cc7402ac89f4bb4b64c39bc365bfee7ccd7ea3a24996ee684c775a5ad158ffff7f2000000000",
}
// Forks `chain` starting at block 6
var fork = []string{
"00000020ada1a9efa81df10d7b430e2fd5f3b085180c91b0e9b0f6e9af2d9b733544015eead915a2f4521c58cb1c42a469aefede5a9d1dddfe8ccc408f8135fc2560f25a096dd158ffff7f20e9aace03",
"0000002097e3603b40c0c7add951e3a7dba5088836d17e1123ef7cffdd60174e3dce0024cffe0c74189d854a778a3e57fee8510103e83d95b221b8bfe1159806b3bde27e236dd158ffff7f20794caff6",
"0000002085a3bf0898ed1cad9e868120c8e044673425a13ecc7ab2daec204ca9190e643ca32434566054789e79214a7cb7c1b6e37084cbfce7564d4aabb10ef6fc1d655c3d6dd158ffff7f20c2e4cb6f",
"000000209aa626e76fbcfc08bc1626a0a9bc7b82d8521de22a477e7b377d8f83be8d446a05aae352ffe9f09af1d79d24992dbee2785b3fe4eb4a0e21e7a3b26a90115dac536dd158ffff7f201d2f76eb",
"000000208d6d636589b4056d1486fbcc0b46adefbb770b7e6a8d668fe65c3f58f5c2c70934008f98664ffec01f583870f843b617c869ec30f1b37723b3d0f0d4a3ba6a88686dd158ffff7f209d12ee06",
"0000002067cf05afedc2b5956c10845006358fe480893e1199a0c0e2b70d5ecf2787af760385ca3d191d1800cd7b6a56d8b44853109f3e5983a94c7e10818541278ec6027b6dd158ffff7f2004e2c75c",
"00000020b2227c6c858a36af167d9667dcf4f58df604ab7962a660d69d233a63e7269f06ecb669fff090b7f2f6952d52c96ca0c8abe1e266d9740f8548eeb10eea9e3536906dd158ffff7f20c0ac3d1e",
}
func createBlockChain(bc *Blockchain) error {
currentTime := time.Unix(1533064176, 0)
best, err := bc.db.GetBestHeader()
if err != nil {
return err
}
x := best.height
last := best.header
totalWork := int64(5000)
for i := 0; i < 2015; i++ {
x++
hdr := wire.BlockHeader{}
hdr.PrevBlock = last.BlockHash()
hdr.Nonce = 0
hdr.Timestamp = currentTime.Add(time.Minute * time.Duration(i))
ch, err := chainhash.NewHashFromStr("04def4ccd13e002ec47d096141c9dce354c7f83034e043a3acc25937b92a96b7")
if err != nil {
return err
}
hdr.MerkleRoot = *ch
hdr.Bits = best.header.Bits
hdr.Version = 3
sh := StoredHeader{
header: hdr,
height: x,
totalWork: big.NewInt(totalWork),
}
bc.db.(*HeaderDB).put(sh, true)
last = hdr
totalWork += 5000
}
return nil
}
var MockCreationTime time.Time
func TestNewBlockchain(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.MainNetParams)
if err != nil {
t.Error(err)
}
best, err := bc.db.GetBestHeader()
if err != nil {
t.Error(err)
}
bestHash := best.header.BlockHash()
checkHash := mainnetCheckpoints[0].Header.BlockHash()
if !bestHash.IsEqual(&checkHash) {
t.Error("Blockchain failed to initialize with correct mainnet checkpoint")
}
if best.height != mainnetCheckpoints[0].Height {
t.Error("Blockchain failed to initialized with correct mainnet checkpoint height")
}
if best.totalWork.Uint64() != 0 {
t.Error("Blockchain failed to initialized with correct mainnet total work")
}
os.RemoveAll("headers.bin")
bc, err = NewBlockchain("", MockCreationTime, &chaincfg.TestNet3Params)
if err != nil {
t.Error(err)
}
best, err = bc.db.GetBestHeader()
if err != nil {
t.Error(err)
}
bestHash = best.header.BlockHash()
checkHash = testnet3Checkpoints[0].Header.BlockHash()
if !bestHash.IsEqual(&checkHash) {
t.Error("Blockchain failed to initialize with correct testnet checkpoint")
}
if best.height != testnet3Checkpoints[0].Height {
t.Error("Blockchain failed to initialized with correct testnet checkpoint height")
}
if best.totalWork.Uint64() != 0 {
t.Error("Blockchain failed to initialized with correct testnet total work")
}
os.RemoveAll("headers.bin")
bc, err = NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
best, err = bc.db.GetBestHeader()
if err != nil {
t.Error(err)
}
bestHash = best.header.BlockHash()
checkHash = regtestCheckpoint.Header.BlockHash()
if !bestHash.IsEqual(&checkHash) {
t.Error("Blockchain failed to initialize with correct regtest checkpoint")
}
if best.height != regtestCheckpoint.Height {
t.Error("Blockchain failed to initialized with correct regtest checkpoint height")
}
if best.totalWork.Uint64() != 0 {
t.Error("Blockchain failed to initialized with correct regtest total work")
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_CommitHeader(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
var headers = []wire.BlockHeader{regtestCheckpoint.Header}
for i, c := range chain {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
hdr.Deserialize(bytes.NewReader(b))
newTip, reorg, height, err := bc.CommitHeader(hdr)
if err != nil {
t.Error()
}
if !newTip {
t.Error("Failed to set new tip when inserting header")
}
if reorg != nil {
t.Error("Incorrectly set reorg when inserting header")
}
if height != uint32(i+1) {
t.Error("Returned incorrect height when inserting header")
}
headers = append(headers, hdr)
}
best, err := bc.db.GetBestHeader()
if err != nil {
t.Error(err)
}
for i := len(headers) - 1; i >= 0; i-- {
putHash := headers[i].BlockHash()
retHash := best.header.BlockHash()
if !putHash.IsEqual(&retHash) {
t.Error("Header put failed")
}
best, err = bc.db.GetPreviousHeader(best.header)
}
os.RemoveAll("headers.bin")
}
func Test_Reorg(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
var headers = []wire.BlockHeader{regtestCheckpoint.Header}
for i, c := range chain {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
hdr.Deserialize(bytes.NewReader(b))
newTip, reorg, height, err := bc.CommitHeader(hdr)
if err != nil {
t.Error()
}
if !newTip {
t.Error("Failed to set new tip when inserting header")
}
if reorg != nil {
t.Error("Incorrectly set reorg when inserting header")
}
if height != uint32(i+1) {
t.Error("Returned incorrect height when inserting header")
}
if i < 5 {
headers = append(headers, hdr)
}
}
for i, c := range fork {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
hdr.Deserialize(bytes.NewReader(b))
newTip, reorg, height, err := bc.CommitHeader(hdr)
if err != nil {
t.Error()
}
if newTip && i+6 < 11 {
t.Error("Incorrectly set new tip when inserting header")
}
if !newTip && i+6 >= 11 {
t.Error("Failed to set new tip when inserting header")
}
if reorg != nil && i+6 != 11 {
t.Error("Incorrectly set reorg when inserting header")
}
if reorg == nil && i+6 == 11 {
t.Error("Failed to return reorg when inserting a header that caused a reorg")
}
if height != uint32(i+6) {
t.Error("Returned incorrect height when inserting header")
}
headers = append(headers, hdr)
}
best, err := bc.db.GetBestHeader()
if err != nil {
t.Error(err)
}
for i := len(headers) - 1; i >= 0; i-- {
putHash := headers[i].BlockHash()
retHash := best.header.BlockHash()
if !putHash.IsEqual(&retHash) {
t.Error("Header put failed")
}
best, err = bc.db.GetPreviousHeader(best.header)
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_GetCommonAncestor(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
for _, c := range chain {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
hdr.Deserialize(bytes.NewReader(b))
bc.CommitHeader(hdr)
}
prevBest := StoredHeader{header: hdr, height: 10}
for i := 0; i < len(fork)-1; i++ {
b, err := hex.DecodeString(fork[i])
if err != nil {
t.Error(err)
}
hdr.Deserialize(bytes.NewReader(b))
bc.CommitHeader(hdr)
}
currentBest := StoredHeader{header: hdr, height: 11}
last, err := bc.GetCommonAncestor(currentBest, prevBest)
if err != nil {
t.Error(err)
}
if last.height != 5 {
t.Error("Incorrect reorg height")
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_CheckHeader(t *testing.T) {
params := &chaincfg.RegressionNetParams
bc, err := NewBlockchain("", MockCreationTime, params)
if err != nil {
t.Error(err)
}
// Test valid header
header0, err := hex.DecodeString(chain[0])
if err != nil {
t.Error(err)
}
var buf bytes.Buffer
buf.Write(header0)
hdr0 := wire.BlockHeader{}
hdr0.Deserialize(&buf)
header1, err := hex.DecodeString(chain[1])
if err != nil {
t.Error(err)
}
buf.Write(header1)
hdr1 := wire.BlockHeader{}
hdr1.Deserialize(&buf)
sh := StoredHeader{
header: hdr0,
height: 150,
totalWork: big.NewInt(0),
}
if !bc.CheckHeader(hdr1, sh) {
t.Error("Check header incorrectly returned false")
}
// Test header doesn't link
header2, err := hex.DecodeString(chain[2])
if err != nil {
t.Error(err)
}
buf.Write(header2)
hdr2 := wire.BlockHeader{}
hdr2.Deserialize(&buf)
if bc.CheckHeader(hdr2, sh) {
t.Error("Check header missed headers that don't link")
}
// Test invalid difficulty
params.ReduceMinDifficulty = false
invalidDiffHdr := hdr1
invalidDiffHdr.Bits = 0
if bc.CheckHeader(invalidDiffHdr, sh) {
t.Error("Check header did not detect invalid PoW")
}
// Test invalid proof of work
params.ReduceMinDifficulty = true
invalidPoWHdr := hdr1
invalidPoWHdr.Nonce = 0
if bc.CheckHeader(invalidPoWHdr, sh) {
t.Error("Check header did not detect invalid PoW")
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_GetNPrevBlockHashes(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
var headers = []wire.BlockHeader{regtestCheckpoint.Header}
for i, c := range chain {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
hdr.Deserialize(bytes.NewReader(b))
newTip, reorg, height, err := bc.CommitHeader(hdr)
if err != nil {
t.Error()
}
if !newTip {
t.Error("Failed to set new tip when inserting header")
}
if reorg != nil {
t.Error("Incorrectly set reorg when inserting header")
}
if height != uint32(i+1) {
t.Error("Returned incorrect height when inserting header")
}
headers = append(headers, hdr)
}
nHashes := bc.GetNPrevBlockHashes(5)
for i := 0; i < 5; i++ {
h := headers[(len(headers)-1)-i].BlockHash()
if !nHashes[i].IsEqual(&h) {
t.Error("GetNPrevBlockHashes returned invalid hashes")
}
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_checkProofOfWork(t *testing.T) {
// Test valid
header0, err := hex.DecodeString(chain[0])
if err != nil {
t.Error(err)
}
var buf bytes.Buffer
buf.Write(header0)
hdr0 := wire.BlockHeader{}
hdr0.Deserialize(&buf)
if !checkProofOfWork(hdr0, &chaincfg.RegressionNetParams) {
t.Error("checkProofOfWork failed")
}
// Test negative target
neg := hdr0
neg.Bits = 1000000000
if checkProofOfWork(neg, &chaincfg.RegressionNetParams) {
t.Error("checkProofOfWork failed to negative target")
}
// Test too high diff
params := chaincfg.RegressionNetParams
params.PowLimit = big.NewInt(0)
if checkProofOfWork(hdr0, ¶ms) {
t.Error("checkProofOfWork failed to detect above max PoW")
}
// Test to low work
badHeader := "1" + chain[0][1:]
header0, err = hex.DecodeString(badHeader)
if err != nil {
t.Error(err)
}
badHdr := wire.BlockHeader{}
buf.Write(header0)
badHdr.Deserialize(&buf)
if checkProofOfWork(badHdr, &chaincfg.RegressionNetParams) {
t.Error("checkProofOfWork failed to detect insuffient work")
}
}
func TestBlockchain_calcDiffAdjust(t *testing.T) {
// Test calculation of next difficulty target with no constraints applying
startHeader := wire.BlockHeader{}
endHeader := wire.BlockHeader{}
startHeader.Timestamp = time.Unix(1261130161, 0) // Block #30240
endHeader.Timestamp = time.Unix(1262152739, 0) // Block #32255
endHeader.Bits = 0x1d00ffff
start := StoredHeader{
header: startHeader,
totalWork: big.NewInt(542463317),
}
end := StoredHeader{
header: endHeader,
totalWork: big.NewInt(543463317),
}
if calcDiffAdjust(start, end, &chaincfg.RegressionNetParams) != 521330725 {
t.Error("callDiffAdjust returned incorrect difficulty")
}
// Test the constraint on the upper bound for next work
startHeader = wire.BlockHeader{}
endHeader = wire.BlockHeader{}
startHeader.Timestamp = time.Unix(1279008237, 0) // Block #0
endHeader.Timestamp = time.Unix(1279008238, 0) // Block #2015
endHeader.Bits = 0x1c05a3f4
start = StoredHeader{
header: startHeader,
totalWork: big.NewInt(100),
}
end = StoredHeader{
header: endHeader,
totalWork: big.NewInt(200),
}
if calcDiffAdjust(start, end, &chaincfg.RegressionNetParams) != 545259519 {
t.Error("callDiffAdjust returned incorrect difficulty")
}
// Test the constraint on the lower bound for actual time taken
startHeader = wire.BlockHeader{}
endHeader = wire.BlockHeader{}
startHeader.Timestamp = time.Unix(1279008237, 0) // Block #66528
endHeader.Timestamp = time.Unix(1279008238, 0) // Block #68543
endHeader.Bits = 0x1c05a3f4
start = StoredHeader{
header: startHeader,
totalWork: big.NewInt(542463317),
}
end = StoredHeader{
header: endHeader,
totalWork: big.NewInt(542563317),
}
if calcDiffAdjust(start, end, &chaincfg.RegressionNetParams) != 523188052 {
t.Error("callDiffAdjust returned incorrect difficulty")
}
// Test the constraint on the upper bound for actual time taken
startHeader = wire.BlockHeader{}
endHeader = wire.BlockHeader{}
startHeader.Timestamp = time.Unix(1263163443, 0) // NOTE: Not an actual block time
endHeader.Timestamp = time.Unix(1269211443, 0) // Block #46367
endHeader.Bits = 0x1c387f6f
start = StoredHeader{
header: startHeader,
totalWork: big.NewInt(542543317),
}
end = StoredHeader{
header: endHeader,
totalWork: big.NewInt(542563317),
}
if calcDiffAdjust(start, end, &chaincfg.RegressionNetParams) != 537114060 {
t.Error("callDiffAdjust returned incorrect difficulty")
}
}
func TestBlockchain_GetBlockLocator(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
var headers = []wire.BlockHeader{regtestCheckpoint.Header}
for i, c := range chain {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
hdr.Deserialize(bytes.NewReader(b))
bc.CommitHeader(hdr)
if i < 5 {
headers = append(headers, hdr)
}
}
for _, c := range fork {
b, err := hex.DecodeString(c)
if err != nil {
t.Error(err)
}
var hdr wire.BlockHeader
hdr.Deserialize(bytes.NewReader(b))
bc.CommitHeader(hdr)
headers = append(headers, hdr)
}
nHashes := bc.GetBlockLocator()
for i := 0; i < 10; i++ {
h := headers[(len(headers)-1)-i].BlockHash()
if !nHashes[i].IsEqual(&h) {
t.Error("GetBlockLocatorHashes returned invalid hashes")
}
}
if nHashes[10].String() != "13ae8e4687ffe9daa1d9d42d1100b398bc328e2d971af1f4464af37f412d3d7c" {
t.Error("Error calculating locator hashes after step increase")
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_GetEpoch(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
}
err = createBlockChain(bc)
if err != nil {
t.Error(err)
}
best, err := bc.BestBlock()
if err != nil {
t.Error(err)
}
epoch, err := bc.GetEpoch(best.header)
if err != nil {
t.Error(err)
}
if epoch.header.BlockHash().String() != "568cf47fe8e401624796ac334dd074c1e78aeeb6cef08d0eab0c7803f6f3e7b6" {
t.Error("Returned incorrect epoch")
}
os.RemoveAll("headers.bin")
}
func TestBlockchain_calcRequiredWork(t *testing.T) {
params := &chaincfg.TestNet3Params
bc, err := NewBlockchain("", MockCreationTime, params)
if err != nil {
t.Error(err)
}
err = createBlockChain(bc)
if err != nil {
t.Error(err)
}
best, err := bc.db.GetBestHeader()
if err != nil {
t.Error(err)
}
// Test during difficulty adjust period
newHdr := wire.BlockHeader{}
newHdr.PrevBlock = best.header.BlockHash()
work, err := bc.calcRequiredWork(newHdr, 2016, best)
if err != nil {
t.Error(err)
}
newHdr.Bits = work
sh := StoredHeader{
header: newHdr,
height: 2016,
totalWork: blockchain.CompactToBig(work),
}
bc.db.Put(sh, true)
// Test during normal adjustment
params.ReduceMinDifficulty = false
newHdr1 := wire.BlockHeader{}
newHdr1.PrevBlock = newHdr.BlockHash()
work1, err := bc.calcRequiredWork(newHdr1, 2017, sh)
if err != nil {
t.Error(err)
}
if work1 != work {
t.Error("Returned in correct bits")
}
newHdr1.Bits = work1
sh = StoredHeader{
header: newHdr1,
height: 2017,
totalWork: blockchain.CompactToBig(work1),
}
bc.db.Put(sh, true)
// Test with reduced difficult flag
params.ReduceMinDifficulty = true
newHdr2 := wire.BlockHeader{}
newHdr2.PrevBlock = newHdr1.BlockHash()
newHdr2.Timestamp = sh.header.Timestamp.Add(targetSpacing * 3)
work2, err := bc.calcRequiredWork(newHdr2, 2018, sh)
if err != nil {
t.Error(err)
}
if work2 != work1 {
t.Error("Returned in correct bits")
}
newHdr2.Bits = work2
sh = StoredHeader{
header: newHdr2,
height: 2018,
totalWork: blockchain.CompactToBig(work2),
}
bc.db.Put(sh, true)
os.RemoveAll("headers.bin")
}
func TestBlockchain_Rollback(t *testing.T) {
bc, err := NewBlockchain("", MockCreationTime, &chaincfg.RegressionNetParams)
if err != nil {
t.Error(err)
return
}
err = createBlockChain(bc)
if err != nil {
t.Error(err)
return
}
sh, err := bc.db.GetBestHeader()
if err != nil {
t.Error(err)
return
}
for i := 0; i < 1000; i++ {
sh, err = bc.db.GetPreviousHeader(sh.header)
if err != nil {
t.Error(err)
return
}
}
err = bc.Rollback(sh.header.Timestamp)
if err != nil {
t.Error(err)
return
}
h, err := bc.db.Height()
if err != nil {
t.Error(err)
return
}
if h != sh.height-1 {
t.Error("Failed to roll back the blockchain to the correct height")
}
os.RemoveAll("headers.bin")
}