Teste Aprendendo Conceitos de Blockchain

Generic propose blockchain for uses like office files, criptocurrency

Test Coverage

Features

• Server
• Block
  • Block's hash
  • Test
• Transaction
  • Transaction list Hash
  • Test
• Key
• Transport => tcp, udp,
  • Local transport layer
• Crypto Keypairs and signature
• Block Signing
• Blockchain struct
• Storage (not memory storage)

Todos

Improvements and fixes that can be implemented

• Add a database or a better storage method to store transactions and block data

Types

• Hash

type Hash [32]uint8
type Address [20]uint8

Mistakes to remember

On the struct Transaction on Signing the transaction the object was missing the value of the transaction's Signature, returnning a null value

func TestSignTransaction(t *testing.T) {
	privateKey := crypto.GeneratePrivateKey()

	tx := &Transaction{
		Data: []byte("foo bar baz"),
	}

	assert.Nil(t, tx.Sign(privateKey))
	assert.NotNil(t, tx.Signature) // FAIL

}

Beacuse of the method signatue (tx T) insted of (tx *T), the object was missing the reference

old :

func (tx Transaction) Sign(privKey crypto.PrivateKey) error {

fixed:

func (tx *Transaction) Sign(privKey crypto.PrivateKey) error {