// 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 NewCoin(index int64, value dcrutil.Amount, numConfs int64) coinset.Coin {
h := fastsha256.New()
h.Write([]byte(fmt.Sprintf("%d", index)))
hash, _ := chainhash.NewHash(h.Sum(nil))
c := &TestCoin{
TxHash: hash,
TxIndex: 0,
TxValue: value,
TxNumConfs: numConfs,
}
return coinset.Coin(c)
}
// outBailmentIDHash returns a byte slice which is used when sorting
// OutputRequests.
func (r OutputRequest) outBailmentIDHash() []byte {
if r.cachedHash != nil {
return r.cachedHash
}
str := r.Server + strconv.Itoa(int(r.Transaction))
hasher := fastsha256.New()
// hasher.Write() always returns nil as the error, so it's safe to ignore it here.
_, _ = hasher.Write([]byte(str))
id := hasher.Sum(nil)
r.cachedHash = id
return id
}
// Hash160 calculates the hash ripemd160(sha256(b)).
func Hash160(buf []byte) []byte {
return calcHash(calcHash(buf, fastsha256.New()), ripemd160.New())
}