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package main
import (
_"fmt"
"time"
_"bytes"
)
type Block struct {
// The number of this block
number uint32
// Hash to the previous block
prevHash string
// Uncles of this block
uncles []*Block
coinbase string
// state xxx
difficulty uint32
// Creation time
time int64
nonce uint32
// List of transactions and/or contracts
transactions []*Transaction
extra string
}
// New block takes a raw encoded string
func NewBlock(raw []byte) *Block {
block := &Block{}
block.UnmarshalRlp(raw)
return block
}
// Creates a new block. This is currently for testing
func CreateBlock(/* TODO use raw data */transactions []*Transaction) *Block {
block := &Block{
// Slice of transactions to include in this block
transactions: transactions,
number: 1,
prevHash: "1234",
coinbase: "me",
difficulty: 10,
nonce: 0,
time: time.Now().Unix(),
}
return block
}
func (block *Block) Update() {
}
// Returns a hash of the block
func (block *Block) Hash() string {
return Sha256Hex(block.MarshalRlp())
}
func (block *Block) MarshalRlp() []byte {
// Marshal the transactions of this block
encTx := make([]string, len(block.transactions))
for i, tx := range block.transactions {
// Cast it to a string (safe)
encTx[i] = string(tx.MarshalRlp())
}
/* I made up the block. It should probably contain different data or types. It sole purpose now is testing */
header := []interface{}{
block.number,
block.prevHash,
// Sha of uncles
"",
block.coinbase,
// root state
"",
// Sha of tx
string(Sha256Bin([]byte(Encode(encTx)))),
block.difficulty,
uint64(block.time),
block.nonce,
block.extra,
}
// TODO
uncles := []interface{}{}
// Encode a slice interface which contains the header and the list of transactions.
return Encode([]interface{}{header, encTx, uncles})
}
func (block *Block) UnmarshalRlp(data []byte) {
t, _ := Decode(data,0)
// interface slice assertion
if slice, ok := t.([]interface{}); ok {
// interface slice assertion
if header, ok := slice[0].([]interface{}); ok {
if number, ok := header[0].(uint8); ok {
block.number = uint32(number)
}
if prevHash, ok := header[1].([]byte); ok {
block.prevHash = string(prevHash)
}
// sha of uncles is header[2]
if coinbase, ok := header[3].([]byte); ok {
block.coinbase = string(coinbase)
}
// state is header[header[4]
// sha is header[5]
// It's either 8bit or 64
if difficulty, ok := header[6].(uint8); ok {
block.difficulty = uint32(difficulty)
}
if difficulty, ok := header[6].(uint64); ok {
block.difficulty = uint32(difficulty)
}
// It's either 8bit or 64
if time, ok := header[7].(uint8); ok {
block.time = int64(time)
}
if time, ok := header[7].(uint64); ok {
block.time = int64(time)
}
if nonce, ok := header[8].(uint8); ok {
block.nonce = uint32(nonce)
}
if extra, ok := header[9].([]byte); ok {
block.extra = string(extra)
}
}
if txSlice, ok := slice[1].([]interface{}); ok {
// Create transaction slice equal to decoded tx interface slice
block.transactions = make([]*Transaction, len(txSlice))
// Unmarshal transactions
for i, tx := range txSlice {
if t, ok := tx.([]byte); ok {
tx := &Transaction{}
// Use the unmarshaled data to unmarshal the transaction
// t is still decoded.
tx.UnmarshalRlp(t)
block.transactions[i] = tx
}
}
}
}
}
|
