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validation.go
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validation.go
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package dfinity
import (
"encoding/binary"
"encoding/hex"
"fmt"
"hash/crc32"
"strings"
"github.com/MixinNetwork/mixin/crypto"
)
const (
DfinityChainBase = "d5db6f39-fe50-4633-8edc-36e2f3e117e4"
)
var (
DfinityChainId crypto.Hash
)
func init() {
DfinityChainId = crypto.NewHash([]byte(DfinityChainBase))
}
func VerifyAssetKey(assetKey string) error {
if assetKey == DfinityChainBase {
return nil
}
return fmt.Errorf("invalid internet computer asset key %s", assetKey)
}
func VerifyAddress(addr string) error {
if strings.TrimSpace(addr) != addr {
return fmt.Errorf("invalid internet computer address %s", addr)
}
buf, err := hex.DecodeString(addr)
if err != nil {
return err
}
if len(buf) != 32 {
return fmt.Errorf("invalid internet computer address %s", addr)
}
result := binary.BigEndian.Uint32(buf[:4])
if result != crc32.ChecksumIEEE(buf[4:]) {
return fmt.Errorf("invalid internet computer address %s", addr)
}
return nil
}
func VerifyTransactionHash(hash string) error {
if len(hash) != 64 {
return fmt.Errorf("invalid internet computer transaction hash %s", hash)
}
if strings.ToLower(hash) != hash {
return fmt.Errorf("invalid internet computer transaction hash %s", hash)
}
h, err := hex.DecodeString(hash)
if err != nil {
return fmt.Errorf("invalid internet computer transaction hash %s %s", hash, err.Error())
}
if len(h) != 32 {
return fmt.Errorf("invalid internet computer transaction hash %s", hash)
}
return nil
}
func GenerateAssetId(assetKey string) crypto.Hash {
switch assetKey {
case DfinityChainBase:
return DfinityChainId
default:
panic(assetKey)
}
}