func merkleRoot(data [][]byte) (types.Hash, error) {
tree := merkle.NewTree()
err := tree.Generate(data, fastsha256.New())
if err != nil {
return types.EmptyHash(), err
}
return tree.Root().Hash, err
}
// DoubleSha256 calculates sha256(sha256(b)) and returns the resulting bytes.
func DoubleSha256(b []byte) []byte {
hasher := fastsha256.New()
hasher.Write(b)
sum := hasher.Sum(nil)
hasher.Reset()
hasher.Write(sum)
return hasher.Sum(nil)
}
func merkleRoot(data [][]byte) (types.Hash, error) {
if len(data) == 1 { // FIXME: a workaround for trees with one element
data = append(data, []byte{})
}
tree := merkle.NewTree()
err := tree.Generate(data, fastsha256.New())
if err != nil {
return types.EmptyHash(), err
}
return types.NewHash(tree.Root().Hash), err
}
func NewCoin(index int64, value btcutil.Amount, numConfs int64) coinset.Coin {
h := fastsha256.New()
h.Write([]byte(fmt.Sprintf("%d", index)))
hash, _ := btcwire.NewShaHash(h.Sum(nil))
c := &TestCoin{
TxHash: hash,
TxIndex: 0,
TxValue: value,
TxNumConfs: numConfs,
}
return coinset.Coin(c)
}
func main() {
lines := bufio.NewReader(os.Stdin)
hasher := fastsha256.New()
for {
line, _, err := lines.ReadLine()
if err != nil {
break
}
hasher.Reset()
hasher.Write(line)
sum := hasher.Sum(nil)
_, pub := btcec.PrivKeyFromBytes(btcec.S256(), sum)
var apk, _ = btcutil.NewAddressPubKey(pub.SerializeUncompressed(), btcwire.MainNet)
fmt.Println(apk.EncodeAddress())
apk, _ = btcutil.NewAddressPubKey(pub.SerializeCompressed(), btcwire.MainNet)
fmt.Println(apk.EncodeAddress())
}
}
// Hash160 calculates the hash ripemd160(sha256(b)).
func Hash160(buf []byte) []byte {
return calcHash(calcHash(buf, fastsha256.New()), ripemd160.New())
}