/
base.go
97 lines (76 loc) · 2.03 KB
/
base.go
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package seal
import (
"time"
"github.com/spikeekips/mitum/base/key"
"github.com/spikeekips/mitum/util"
"github.com/spikeekips/mitum/util/hint"
"github.com/spikeekips/mitum/util/localtime"
"github.com/spikeekips/mitum/util/valuehash"
)
type BaseSeal struct {
hint.BaseHinter
h valuehash.Hash
bodyHash valuehash.Hash
signer key.Publickey
signature key.Signature
signedAt time.Time
GenerateBodyHashFunc func() (valuehash.Hash, error)
}
func NewBaseSealWithHint(ht hint.Hint) BaseSeal {
return BaseSeal{BaseHinter: hint.NewBaseHinter(ht)}
}
func (sl BaseSeal) IsValid(networkID []byte) error {
if err := sl.BaseHinter.IsValid(nil); err != nil {
return err
}
return IsValidSeal(sl, networkID)
}
func (sl BaseSeal) Hash() valuehash.Hash {
return sl.h
}
func (sl BaseSeal) GenerateHash() valuehash.Hash {
return valuehash.NewSHA256(util.ConcatBytesSlice(sl.bodyHash.Bytes(), sl.signature.Bytes()))
}
func (sl BaseSeal) BodyHash() valuehash.Hash {
return sl.bodyHash
}
func (sl BaseSeal) BodyBytes() []byte {
return util.ConcatBytesSlice(
sl.signer.Bytes(),
localtime.NewTime(sl.signedAt).Bytes(),
)
}
func (sl BaseSeal) GenerateBodyHash() (valuehash.Hash, error) {
f := sl.defaultGenerateBodyHash
if sl.GenerateBodyHashFunc != nil {
f = sl.GenerateBodyHashFunc
}
return f()
}
func (sl BaseSeal) Signer() key.Publickey {
return sl.signer
}
func (sl BaseSeal) Signature() key.Signature {
return sl.signature
}
func (sl BaseSeal) SignedAt() time.Time {
return sl.signedAt
}
func (sl *BaseSeal) Sign(pk key.Privatekey, b []byte) error {
sl.signer = pk.Publickey()
sl.signedAt = localtime.UTCNow()
var err error
sl.bodyHash, err = sl.GenerateBodyHash()
if err != nil {
return err
}
sl.signature, err = pk.Sign(util.ConcatBytesSlice(sl.bodyHash.Bytes(), b))
if err != nil {
return err
}
sl.h = sl.GenerateHash()
return nil
}
func (sl BaseSeal) defaultGenerateBodyHash() (valuehash.Hash, error) {
return valuehash.NewSHA256(sl.BodyBytes()), nil
}