8 "github.com/bytom/crypto/sha3pool"
9 "github.com/bytom/encoding/blockchain"
12 // AssetID is the Hash256 of the asset definition.
14 func NewAssetID(b [32]byte) (a AssetID) {
15 return AssetID(NewHash(b))
18 func (a AssetID) Byte32() (b32 [32]byte) { return Hash(a).Byte32() }
19 func (a AssetID) MarshalText() ([]byte, error) { return Hash(a).MarshalText() }
20 func (a *AssetID) UnmarshalText(b []byte) error { return (*Hash)(a).UnmarshalText(b) }
21 func (a *AssetID) UnmarshalJSON(b []byte) error { return (*Hash)(a).UnmarshalJSON(b) }
22 func (a AssetID) Bytes() []byte { return Hash(a).Bytes() }
23 func (a AssetID) Value() (driver.Value, error) { return Hash(a).Value() }
24 func (a *AssetID) Scan(val interface{}) error { return (*Hash)(a).Scan(val) }
25 func (a AssetID) WriteTo(w io.Writer) (int64, error) { return Hash(a).WriteTo(w) }
26 func (a *AssetID) ReadFrom(r io.Reader) (int64, error) { return (*Hash)(a).ReadFrom(r) }
27 func (a *AssetID) IsZero() bool { return (*Hash)(a).IsZero() }
29 func (ad *AssetDefinition) ComputeAssetID() (assetID AssetID) {
30 h := sha3pool.Get256()
31 defer sha3pool.Put256(h)
32 writeForHash(h, *ad) // error is impossible
34 h.Read(b[:]) // error is impossible
38 func ComputeAssetID(prog []byte, vmVersion uint64, data *Hash) AssetID {
39 def := &AssetDefinition{
40 IssuanceProgram: &Program{
46 return def.ComputeAssetID()
49 func (a *AssetAmount) ReadFrom(r *blockchain.Reader) (err error) {
51 if _, err = assetID.ReadFrom(r); err != nil {
55 a.Amount, err = blockchain.ReadVarint63(r)
59 func (a AssetAmount) WriteTo(w io.Writer) (int64, error) {
60 n, err := a.AssetId.WriteTo(w)
64 n2, err := blockchain.WriteVarint63(w, a.Amount)
65 return n + int64(n2), err
68 func (a *AssetAmount) Equal(other *AssetAmount) (eq bool, err error) {
69 if a == nil || other == nil {
70 return false, errors.New("empty asset amount")
72 if a.AssetId == nil || other.AssetId == nil {
73 return false, errors.New("empty asset id")
75 return a.Amount == other.Amount && *a.AssetId == *other.AssetId, nil