add initial node

node/node.go

@@ -0,0 +1,35 @@
+package node
+
+import (
+	"crypto/ecdsa"
+
+	"github.com/arnaucube/slowlorisdb/core"
+	"github.com/arnaucube/slowlorisdb/db"
+)
+
+type Node struct {
+	PrivK *ecdsa.PrivateKey
+	Addr  core.Address
+	Bc    *core.Blockchain
+}
+
+func NewNode(db *db.Db) (*Node, error) {
+	privK, err := core.NewKey()
+	if err != nil {
+		return nil, err
+	}
+	addr := core.AddressFromPrivK(privK)
+
+	bc := core.NewBlockchain(db)
+
+	node := &Node{
+		PrivK: privK,
+		Addr:  addr,
+		Bc:    bc,
+	}
+	return node, nil
+}
+
+func (node *Node) Sign(m []byte) (*core.Signature, error) {
+	return core.Sign(node.PrivK, m)
+}

node/node_test.go

@@ -0,0 +1,38 @@
+package node
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"github.com/arnaucube/slowlorisdb/core"
+	"github.com/arnaucube/slowlorisdb/db"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNode(t *testing.T) {
+	dir, err := ioutil.TempDir("", "db")
+	assert.Nil(t, err)
+	db, err := db.New(dir)
+	assert.Nil(t, err)
+
+	node, err := NewNode(db)
+	assert.Nil(t, err)
+
+	assert.Equal(t, node.Addr, core.AddressFromPrivK(node.PrivK))
+}
+
+func TestNodeSignature(t *testing.T) {
+	dir, err := ioutil.TempDir("", "db")
+	assert.Nil(t, err)
+	db, err := db.New(dir)
+	assert.Nil(t, err)
+
+	node, err := NewNode(db)
+	assert.Nil(t, err)
+
+	m := []byte("test")
+	sig, err := node.Sign(m)
+	assert.Nil(t, err)
+	pubK := node.PrivK.PublicKey
+	assert.True(t, core.VerifySignature(&pubK, m, *sig))
+}