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vrf.go
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vrf.go
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package keystore
import (
"fmt"
"math/big"
"github.com/pkg/errors"
"github.com/smartcontractkit/chainlink/core/services/keystore/keys/vrfkey"
)
//go:generate mockery --name VRF --output ./mocks/ --case=underscore --filename vrf.go
type VRF interface {
Get(id string) (vrfkey.KeyV2, error)
GetAll() ([]vrfkey.KeyV2, error)
Create() (vrfkey.KeyV2, error)
Add(key vrfkey.KeyV2) error
Delete(id string) (vrfkey.KeyV2, error)
Import(keyJSON []byte, password string) (vrfkey.KeyV2, error)
Export(id string, password string) ([]byte, error)
GenerateProof(id string, seed *big.Int) (vrfkey.Proof, error)
GetV1KeysAsV2(password string) ([]vrfkey.KeyV2, error)
}
var (
ErrMissingVRFKey = errors.New("unable to find VRF key")
)
type vrf struct {
*keyManager
}
var _ VRF = &vrf{}
func newVRFKeyStore(km *keyManager) *vrf {
return &vrf{
km,
}
}
func (ks *vrf) Get(id string) (vrfkey.KeyV2, error) {
ks.lock.RLock()
defer ks.lock.RUnlock()
if ks.isLocked() {
return vrfkey.KeyV2{}, ErrLocked
}
return ks.getByID(id)
}
func (ks *vrf) GetAll() (keys []vrfkey.KeyV2, _ error) {
ks.lock.RLock()
defer ks.lock.RUnlock()
if ks.isLocked() {
return nil, ErrLocked
}
for _, key := range ks.keyRing.VRF {
keys = append(keys, key)
}
return keys, nil
}
func (ks *vrf) Create() (vrfkey.KeyV2, error) {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return vrfkey.KeyV2{}, ErrLocked
}
key, err := vrfkey.NewV2()
if err != nil {
return vrfkey.KeyV2{}, err
}
return key, ks.safeAddKey(key)
}
func (ks *vrf) Add(key vrfkey.KeyV2) error {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return ErrLocked
}
if _, found := ks.keyRing.VRF[key.ID()]; found {
return fmt.Errorf("key with ID %s already exists", key.ID())
}
return ks.safeAddKey(key)
}
func (ks *vrf) Delete(id string) (vrfkey.KeyV2, error) {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return vrfkey.KeyV2{}, ErrLocked
}
key, err := ks.getByID(id)
if err != nil {
return vrfkey.KeyV2{}, err
}
err = ks.safeRemoveKey(key)
return key, err
}
func (ks *vrf) Import(keyJSON []byte, password string) (vrfkey.KeyV2, error) {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return vrfkey.KeyV2{}, ErrLocked
}
key, err := vrfkey.FromEncryptedJSON(keyJSON, password)
if err != nil {
return vrfkey.KeyV2{}, errors.Wrap(err, "VRFKeyStore#ImportKey failed to decrypt key")
}
if _, found := ks.keyRing.VRF[key.ID()]; found {
return vrfkey.KeyV2{}, fmt.Errorf("key with ID %s already exists", key.ID())
}
return key, ks.keyManager.safeAddKey(key)
}
func (ks *vrf) Export(id string, password string) ([]byte, error) {
ks.lock.RLock()
defer ks.lock.RUnlock()
if ks.isLocked() {
return nil, ErrLocked
}
key, err := ks.getByID(id)
if err != nil {
return nil, err
}
return key.ToEncryptedJSON(password, ks.scryptParams)
}
func (ks *vrf) GenerateProof(id string, seed *big.Int) (vrfkey.Proof, error) {
ks.lock.RLock()
defer ks.lock.RUnlock()
if ks.isLocked() {
return vrfkey.Proof{}, ErrLocked
}
key, err := ks.getByID(id)
if err != nil {
return vrfkey.Proof{}, err
}
return key.GenerateProof(seed)
}
func (ks *vrf) GetV1KeysAsV2(password string) (keys []vrfkey.KeyV2, _ error) {
if len(password) == 0 {
return keys, nil
}
v1Keys, err := ks.orm.GetEncryptedV1VRFKeys()
if err != nil {
return keys, err
}
for _, keyV1 := range v1Keys {
pk, err := vrfkey.Decrypt(keyV1, password) // V1 VRF keys have their own password
if err != nil {
return keys, err
}
keys = append(keys, pk.ToV2())
}
return keys, nil
}
func (ks *vrf) getByID(id string) (vrfkey.KeyV2, error) {
key, found := ks.keyRing.VRF[id]
if !found {
return vrfkey.KeyV2{}, KeyNotFoundError{ID: id, KeyType: "VRF"}
}
return key, nil
}