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starknet.go
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starknet.go
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package keystore
import (
"context"
"fmt"
"math/big"
"github.com/pkg/errors"
"github.com/NethermindEth/starknet.go/curve"
"github.com/smartcontractkit/chainlink-common/pkg/loop"
adapters "github.com/smartcontractkit/chainlink-common/pkg/loop/adapters/starknet"
"github.com/smartcontractkit/chainlink/v2/core/services/keystore/keys/starkkey"
)
//go:generate mockery --quiet --name StarkNet --output ./mocks/ --case=underscore --filename starknet.go
type StarkNet interface {
Get(id string) (starkkey.Key, error)
GetAll() ([]starkkey.Key, error)
Create() (starkkey.Key, error)
Add(key starkkey.Key) error
Delete(id string) (starkkey.Key, error)
Import(keyJSON []byte, password string) (starkkey.Key, error)
Export(id string, password string) ([]byte, error)
EnsureKey() error
}
type starknet struct {
*keyManager
}
var _ StarkNet = &starknet{}
func newStarkNetKeyStore(km *keyManager) *starknet {
return &starknet{
km,
}
}
func (ks *starknet) Get(id string) (starkkey.Key, error) {
ks.lock.RLock()
defer ks.lock.RUnlock()
if ks.isLocked() {
return starkkey.Key{}, ErrLocked
}
return ks.getByID(id)
}
func (ks *starknet) GetAll() (keys []starkkey.Key, _ error) {
ks.lock.RLock()
defer ks.lock.RUnlock()
if ks.isLocked() {
return nil, ErrLocked
}
for _, key := range ks.keyRing.StarkNet {
keys = append(keys, key)
}
return keys, nil
}
func (ks *starknet) Create() (starkkey.Key, error) {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return starkkey.Key{}, ErrLocked
}
key, err := starkkey.New()
if err != nil {
return starkkey.Key{}, err
}
return key, ks.safeAddKey(key)
}
func (ks *starknet) Add(key starkkey.Key) error {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return ErrLocked
}
if _, found := ks.keyRing.StarkNet[key.ID()]; found {
return fmt.Errorf("key with ID %s already exists", key.ID())
}
return ks.safeAddKey(key)
}
func (ks *starknet) Delete(id string) (starkkey.Key, error) {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return starkkey.Key{}, ErrLocked
}
key, err := ks.getByID(id)
if err != nil {
return starkkey.Key{}, err
}
err = ks.safeRemoveKey(key)
return key, err
}
func (ks *starknet) Import(keyJSON []byte, password string) (starkkey.Key, error) {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return starkkey.Key{}, ErrLocked
}
key, err := starkkey.FromEncryptedJSON(keyJSON, password)
if err != nil {
return starkkey.Key{}, errors.Wrap(err, "StarkNetKeyStore#ImportKey failed to decrypt key")
}
if _, found := ks.keyRing.StarkNet[key.ID()]; found {
return starkkey.Key{}, fmt.Errorf("key with ID %s already exists", key.ID())
}
return key, ks.keyManager.safeAddKey(key)
}
func (ks *starknet) 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 starkkey.ToEncryptedJSON(key, password, ks.scryptParams)
}
func (ks *starknet) EnsureKey() error {
ks.lock.Lock()
defer ks.lock.Unlock()
if ks.isLocked() {
return ErrLocked
}
if len(ks.keyRing.StarkNet) > 0 {
return nil
}
key, err := starkkey.New()
if err != nil {
return err
}
ks.logger.Infof("Created StarkNet key with ID %s", key.ID())
return ks.safeAddKey(key)
}
func (ks *starknet) getByID(id string) (starkkey.Key, error) {
key, found := ks.keyRing.StarkNet[id]
if !found {
return starkkey.Key{}, KeyNotFoundError{ID: id, KeyType: "StarkNet"}
}
return key, nil
}
// StarknetLooppSigner implements [github.com/smartcontractkit/chainlink-common/pkg/loop.Keystore] interface and the requirements
// of signature d/encoding of the [github.com/smartcontractkit/chainlink-starknet/relayer/pkg/chainlink/txm.NewKeystoreAdapter]
type StarknetLooppSigner struct {
StarkNet
}
var _ loop.Keystore = &StarknetLooppSigner{}
// Sign implements [loop.Keystore]
// hash is expected to be the byte representation of big.Int
// the returned []byte is an encoded [github.com/smartcontractkit/chainlink-common/pkg/loop/adapters/starknet.Signature].
// this enables compatibility with [github.com/smartcontractkit/chainlink-starknet/relayer/pkg/chainlink/txm.NewKeystoreAdapter]
func (lk *StarknetLooppSigner) Sign(ctx context.Context, id string, hash []byte) ([]byte, error) {
k, err := lk.Get(id)
if err != nil {
return nil, err
}
// loopp spec requires passing nil hash to check existence of id
if hash == nil {
return nil, nil
}
starkHash := new(big.Int).SetBytes(hash)
x, y, err := curve.Curve.Sign(starkHash, k.ToPrivKey())
if err != nil {
return nil, fmt.Errorf("error signing data with curve: %w", err)
}
sig, err := adapters.SignatureFromBigInts(x, y)
if err != nil {
return nil, err
}
return sig.Bytes()
}
// TODO what is this supposed to return for starknet?
func (lk *StarknetLooppSigner) Accounts(ctx context.Context) ([]string, error) {
return nil, fmt.Errorf("unimplemented")
}