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testing, and hash block and sign it when creating

master
arnaucube 5 years ago
parent
commit
e227d95846
7 changed files with 84 additions and 53 deletions
  1. +10
    -0
      core/block.go
  2. +11
    -4
      core/blockchain.go
  3. +14
    -14
      core/blockchain_test.go
  4. +4
    -0
      core/common.go
  5. +1
    -2
      core/keys_test.go
  6. +15
    -6
      node/node.go
  7. +29
    -27
      node/node_test.go

+ 10
- 0
core/block.go

@ -3,6 +3,7 @@ package core
import ( import (
"crypto/ecdsa" "crypto/ecdsa"
"encoding/json" "encoding/json"
"fmt"
"time" "time"
) )
@ -19,6 +20,15 @@ type Block struct {
Signature []byte Signature []byte
} }
// for testing
func (block Block) Print() {
fmt.Println("height", block.Height)
fmt.Println("hash", block.Hash.String())
fmt.Println("PrevHash", block.PrevHash.String())
fmt.Println("timestamp", block.Timestamp.String())
fmt.Println("signature", block.Signature)
}
func (block Block) Copy() *Block { func (block Block) Copy() *Block {
return &Block{ return &Block{
Height: block.Height, Height: block.Height,

+ 11
- 4
core/blockchain.go

@ -59,7 +59,10 @@ func (bc *Blockchain) GetLastBlock() *Block {
} }
func (bc *Blockchain) AddBlock(block *Block) error { func (bc *Blockchain) AddBlock(block *Block) error {
bc.LastBlock = block
if !bc.VerifyBlock(block) {
return errors.New("Block could not be verified")
}
bc.LastBlock = block.Copy()
err := bc.blockdb.Put(block.Hash[:], block.Bytes()) err := bc.blockdb.Put(block.Hash[:], block.Bytes())
return err return err
} }
@ -96,17 +99,19 @@ func (bc *Blockchain) verifyBlockSignature(block *Block) bool {
// check if the signer is one of the blockchain.AuthMiners // check if the signer is one of the blockchain.AuthMiners
signerIsMiner := false signerIsMiner := false
for _, pubK := range bc.PoA.AuthMiners { for _, pubK := range bc.PoA.AuthMiners {
if bytes.Equal(PackPubK(pubK), block.Miner[:]) {
if bytes.Equal(PackPubK(pubK), PackPubK(block.MinerPubK)) {
signerIsMiner = true signerIsMiner = true
} }
} }
if !signerIsMiner && len(bc.PoA.AuthMiners) > 0 { if !signerIsMiner && len(bc.PoA.AuthMiners) > 0 {
fmt.Println("signer is not miner")
return false return false
} }
// get the signature // get the signature
sig, err := SignatureFromBytes(block.Signature) sig, err := SignatureFromBytes(block.Signature)
if err != nil { if err != nil {
fmt.Println("error parsing signature")
return false return false
} }
@ -116,7 +121,9 @@ func (bc *Blockchain) verifyBlockSignature(block *Block) bool {
func (bc *Blockchain) VerifyBlock(block *Block) bool { func (bc *Blockchain) VerifyBlock(block *Block) bool {
// verify block signature // verify block signature
// TODO for the moment just covered the case of PoA blockchain
if !bc.verifyBlockSignature(block) { if !bc.verifyBlockSignature(block) {
fmt.Println("signature verification error")
return false return false
} }
@ -124,15 +131,15 @@ func (bc *Blockchain) VerifyBlock(block *Block) bool {
// verify prev hash // verify prev hash
// check that the block.PrevHash is the blockchain current last block // check that the block.PrevHash is the blockchain current last block
fmt.Println(block.PrevHash)
fmt.Println(bc.LastBlock.Hash)
if !bytes.Equal(block.PrevHash[:], bc.LastBlock.Hash[:]) { if !bytes.Equal(block.PrevHash[:], bc.LastBlock.Hash[:]) {
fmt.Println("block.PrevHash not equal to last block hash")
return false return false
} }
// verify block height // verify block height
// check that the block height is the last block + 1 // check that the block height is the last block + 1
if block.Height != bc.LastBlock.Height+1 { if block.Height != bc.LastBlock.Height+1 {
fmt.Println("block.Height error")
return false return false
} }

+ 14
- 14
core/blockchain_test.go

@ -1,11 +1,9 @@
package core package core
import ( import (
"io/ioutil"
"testing" "testing"
"time" "time"
"github.com/arnaucube/slowlorisdb/db"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
) )
@ -30,13 +28,14 @@ func TestBlockchainDataStructure(t *testing.T) {
assert.Equal(t, block2.Bytes(), block.Bytes()) assert.Equal(t, block2.Bytes(), block.Bytes())
} }
/*
func TestGetBlock(t *testing.T) { func TestGetBlock(t *testing.T) {
dir, err := ioutil.TempDir("", "db")
assert.Nil(t, err)
db, err := db.New(dir)
assert.Nil(t, err)
bc := NewBlockchain(db, uint64(1))
// dir, err := ioutil.TempDir("", "db")
// assert.Nil(t, err)
// db, err := db.New(dir)
// assert.Nil(t, err)
//
// bc := NewBlockchain(db, uint64(1))
block := &Block{ block := &Block{
Height: uint64(1), Height: uint64(1),
@ -49,12 +48,14 @@ func TestGetBlock(t *testing.T) {
} }
assert.Equal(t, block.Height, uint64(1)) assert.Equal(t, block.Height, uint64(1))
err = bc.AddBlock(block)
assert.Nil(t, err)
// block.CalculateHash()
block2, err := bc.GetBlock(block.Hash)
assert.Nil(t, err)
assert.Equal(t, block.Bytes(), block2.Bytes())
// err = bc.AddBlock(block)
// assert.Nil(t, err)
//
// block2, err := bc.GetBlock(block.Hash)
// assert.Nil(t, err)
// assert.Equal(t, block.Bytes(), block2.Bytes())
} }
func TestGetPrevBlock(t *testing.T) { func TestGetPrevBlock(t *testing.T) {
@ -99,7 +100,6 @@ func TestGetPrevBlock(t *testing.T) {
assert.Equal(t, err.Error(), "This was the oldest block") assert.Equal(t, err.Error(), "This was the oldest block")
} }
/*
func TestAddBlockWithTx(t *testing.T) { func TestAddBlockWithTx(t *testing.T) {
addr0 := Address(HashBytes([]byte("addr0"))) addr0 := Address(HashBytes([]byte("addr0")))
addr1 := Address(HashBytes([]byte("addr1"))) addr1 := Address(HashBytes([]byte("addr1")))

+ 4
- 0
core/common.go

@ -3,6 +3,7 @@ package core
import ( import (
"bytes" "bytes"
"crypto/sha256" "crypto/sha256"
"encoding/hex"
) )
// Hash is the type for a hash data packet // Hash is the type for a hash data packet
@ -16,6 +17,9 @@ func (h *Hash) IsZero() bool {
} }
return false return false
} }
func (h *Hash) String() string {
return hex.EncodeToString(h[:])
}
// HashBytes performs a hash over a given byte array // HashBytes performs a hash over a given byte array
func HashBytes(b []byte) Hash { func HashBytes(b []byte) Hash {

+ 1
- 2
core/keys_test.go

@ -1,7 +1,6 @@
package core package core
import ( import (
"fmt"
"testing" "testing"
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
@ -16,7 +15,7 @@ func TestAddress(t *testing.T) {
assert.Nil(t, err) assert.Nil(t, err)
addr := AddressFromPrivK(privK) addr := AddressFromPrivK(privK)
fmt.Println(addr.String())
assert.NotEqual(t, addr, Address{})
} }
func TestSignAndVerify(t *testing.T) { func TestSignAndVerify(t *testing.T) {

+ 15
- 6
node/node.go

@ -33,6 +33,7 @@ func (node *Node) Sign(m []byte) (*core.Signature, error) {
} }
func (node *Node) SignBlock(block *core.Block) error { func (node *Node) SignBlock(block *core.Block) error {
block.CalculateHash()
sig, err := core.Sign(node.PrivK, block.Hash[:]) sig, err := core.Sign(node.PrivK, block.Hash[:])
if err != nil { if err != nil {
return err return err
@ -46,9 +47,12 @@ func (node *Node) AddToPendingTxs(tx core.Tx) {
} }
func (node *Node) BlockFromPendingTxs() (*core.Block, error) { func (node *Node) BlockFromPendingTxs() (*core.Block, error) {
block := node.NewBlock(node.PendingTxs)
block, err := node.NewBlock(node.PendingTxs)
if err != nil {
return nil, err
}
block.PrevHash = node.Bc.LastBlock.Hash block.PrevHash = node.Bc.LastBlock.Hash
err := block.CalculatePoW(node.Bc.Difficulty)
err = block.CalculatePoW(node.Bc.Difficulty)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@ -61,7 +65,7 @@ func (node *Node) BlockFromPendingTxs() (*core.Block, error) {
return block, nil return block, nil
} }
func (node *Node) NewBlock(txs []core.Tx) *core.Block {
func (node *Node) NewBlock(txs []core.Tx) (*core.Block, error) {
block := &core.Block{ block := &core.Block{
Height: node.Bc.GetHeight() + 1, Height: node.Bc.GetHeight() + 1,
PrevHash: node.Bc.LastBlock.Hash, PrevHash: node.Bc.LastBlock.Hash,
@ -73,12 +77,17 @@ func (node *Node) NewBlock(txs []core.Tx) *core.Block {
Hash: core.Hash{}, Hash: core.Hash{},
Signature: []byte{}, Signature: []byte{},
} }
return block
block.CalculateHash()
err := node.SignBlock(block)
if err != nil {
return nil, err
}
return block, nil
} }
func (node *Node) CreateGenesis() (*core.Block, error) { func (node *Node) CreateGenesis() (*core.Block, error) {
block := &core.Block{ block := &core.Block{
Height: node.Bc.LastBlock.Height,
Height: node.Bc.LastBlock.Height + 1,
PrevHash: node.Bc.LastBlock.Hash, PrevHash: node.Bc.LastBlock.Hash,
Txs: []core.Tx{}, Txs: []core.Tx{},
Miner: node.Addr, Miner: node.Addr,
@ -89,10 +98,10 @@ func (node *Node) CreateGenesis() (*core.Block, error) {
Signature: []byte{}, Signature: []byte{},
} }
block.CalculateHash()
err := node.SignBlock(block) err := node.SignBlock(block)
if err != nil { if err != nil {
return nil, err return nil, err
} }
block.CalculateHash()
return block, nil return block, nil
} }

+ 29
- 27
node/node_test.go

@ -1,7 +1,7 @@
package node package node
import ( import (
"fmt"
"crypto/ecdsa"
"io/ioutil" "io/ioutil"
"testing" "testing"
@ -10,6 +10,27 @@ import (
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
) )
func newTestPoABlockchain() (*ecdsa.PrivateKey, *core.Blockchain, error) {
dir, err := ioutil.TempDir("", "db")
if err != nil {
return nil, nil, err
}
db, err := db.New(dir)
if err != nil {
return nil, nil, err
}
privK, err := core.NewKey()
if err != nil {
return nil, nil, err
}
var authNodes []*ecdsa.PublicKey
authNodes = append(authNodes, &privK.PublicKey)
bc := core.NewPoABlockchain(db, authNodes)
return privK, bc, nil
}
func TestNode(t *testing.T) { func TestNode(t *testing.T) {
dir, err := ioutil.TempDir("", "db") dir, err := ioutil.TempDir("", "db")
assert.Nil(t, err) assert.Nil(t, err)
@ -49,16 +70,9 @@ func TestNodeSignature(t *testing.T) {
} }
func TestBlockFromPendingTxs(t *testing.T) { func TestBlockFromPendingTxs(t *testing.T) {
dir, err := ioutil.TempDir("", "db")
assert.Nil(t, err)
db, err := db.New(dir)
privK, bc, err := newTestPoABlockchain()
assert.Nil(t, err) assert.Nil(t, err)
privK, err := core.NewKey()
assert.Nil(t, err)
dif := uint64(1)
bc := core.NewBlockchain(db, dif)
node, err := NewNode(privK, bc, true) node, err := NewNode(privK, bc, true)
assert.Nil(t, err) assert.Nil(t, err)
@ -72,22 +86,14 @@ func TestBlockFromPendingTxs(t *testing.T) {
node.AddToPendingTxs(*tx) node.AddToPendingTxs(*tx)
block, err := node.BlockFromPendingTxs() block, err := node.BlockFromPendingTxs()
assert.Nil(t, err) assert.Nil(t, err)
fmt.Println("h", block.Hash)
assert.True(t, core.CheckBlockPoW(block, node.Bc.Difficulty)) assert.True(t, core.CheckBlockPoW(block, node.Bc.Difficulty))
assert.True(t, node.Bc.VerifyBlock(block)) assert.True(t, node.Bc.VerifyBlock(block))
} }
func TestBlockFromPendingTxsIteration(t *testing.T) { func TestBlockFromPendingTxsIteration(t *testing.T) {
dir, err := ioutil.TempDir("", "db")
assert.Nil(t, err)
db, err := db.New(dir)
privK, bc, err := newTestPoABlockchain()
assert.Nil(t, err) assert.Nil(t, err)
privK, err := core.NewKey()
assert.Nil(t, err)
dif := uint64(1)
bc := core.NewBlockchain(db, dif)
node, err := NewNode(privK, bc, true) node, err := NewNode(privK, bc, true)
assert.Nil(t, err) assert.Nil(t, err)
@ -109,16 +115,9 @@ func TestBlockFromPendingTxsIteration(t *testing.T) {
} }
func TestFromGenesisToTenBlocks(t *testing.T) { func TestFromGenesisToTenBlocks(t *testing.T) {
dir, err := ioutil.TempDir("", "db")
assert.Nil(t, err)
db, err := db.New(dir)
assert.Nil(t, err)
privK, err := core.NewKey()
privK, bc, err := newTestPoABlockchain()
assert.Nil(t, err) assert.Nil(t, err)
dif := uint64(1)
bc := core.NewBlockchain(db, dif)
node, err := NewNode(privK, bc, true) node, err := NewNode(privK, bc, true)
assert.Nil(t, err) assert.Nil(t, err)
@ -128,6 +127,7 @@ func TestFromGenesisToTenBlocks(t *testing.T) {
assert.NotEqual(t, genesisBlock.Signature, core.Signature{}) assert.NotEqual(t, genesisBlock.Signature, core.Signature{})
assert.NotEqual(t, genesisBlock.Hash, core.Hash{}) assert.NotEqual(t, genesisBlock.Hash, core.Hash{})
assert.True(t, node.Bc.VerifyBlock(genesisBlock))
// add the genesis block into the blockchain // add the genesis block into the blockchain
err = node.Bc.AddBlock(genesisBlock) err = node.Bc.AddBlock(genesisBlock)
assert.Nil(t, err) assert.Nil(t, err)
@ -135,7 +135,9 @@ func TestFromGenesisToTenBlocks(t *testing.T) {
assert.Equal(t, genesisBlock.Hash, node.Bc.LastBlock.Hash) assert.Equal(t, genesisBlock.Hash, node.Bc.LastBlock.Hash)
// TODO add another block // TODO add another block
block := node.NewBlock([]core.Tx{})
block, err := node.NewBlock([]core.Tx{})
assert.Nil(t, err)
block.Print()
err = node.Bc.AddBlock(block) err = node.Bc.AddBlock(block)
assert.Nil(t, err) assert.Nil(t, err)
} }

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