当前位置 博文首页 > go语言实战之实现比特币地址校验步骤
生成地址代码如下
func (w Wallet) GetAddress() []byte {
pubKeyHash := HashPubKey(w.PublicKey)
versionedPayload := append([]byte{version}, pubKeyHash...)
checksum := checksum(versionedPayload)
fullPayload := append(versionedPayload, checksum...)
address := Base58Encode(fullPayload)
return address
}
func HashPubKey(pubKey []byte) []byte {
publicSHA256 := sha256.Sum256(pubKey)
RIPEMD160Hasher := ripemd160.New()
_, err := RIPEMD160Hasher.Write(publicSHA256[:])
publicRIPEMD160 := RIPEMD160Hasher.Sum(nil)
return publicRIPEMD160
}
func checksum(payload []byte) []byte {
firstSHA := sha256.Sum256(payload)
secondSHA := sha256.Sum256(firstSHA[:])
return secondSHA[:addressChecksumLen]
}
地址是否正确代码
addressChecksumLen：=4
func ValidateAddress(address string) bool {
pubKeyHash := Base58Decode([]byte(address))
actualChecksum := pubKeyHash[len(pubKeyHash)-addressChecksumLen:]
version := pubKeyHash[0]
pubKeyHash = pubKeyHash[1 : len(pubKeyHash)-addressChecksumLen]
targetChecksum := checksum(append([]byte{version}, pubKeyHash...))
return bytes.Compare(actualChecksum, targetChecksum) == 0
}
Base58Decode是对比特币地址进行解码，然后取后四位校验位actualChecksum，利用去掉校验位的pubKeyHash再次算出校验位与地址的校验位做出对比，即可验证地址的正确性。 其中用到的函数有：
func checksum(payload []byte) [] //利用两次shah256求校验位
byte {
firstSHA := sha256.Sum256(payload)
secondSHA := sha256.Sum256(firstSHA[:])
return secondSHA[:addressChecksumLen]
}
这是解码的函数，已经有不少现有的代码支持，故不作讲解
func Base58Decode(input []byte) []byte {
result := big.NewInt(0)
zeroBytes := 0
for b := range input {
if b == 0x00 {
zeroBytes++
}
}
payload := input[zeroBytes:]
for _, b := range payload {
charIndex := bytes.IndexByte(b58Alphabet, b)
result.Mul(result, big.NewInt(58))
result.Add(result, big.NewInt(int64(charIndex)))
}
decoded := result.Bytes()
decoded = append(bytes.Repeat([]byte{byte(0x00)}, zeroBytes), decoded...)
return decoded
}
