/
helper.go
142 lines (119 loc) · 3.92 KB
/
helper.go
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package signer
import (
"crypto/ecdsa"
"fmt"
"testing"
"github.com/KalyCoinProject/kalychain/crypto"
"github.com/KalyCoinProject/kalychain/helper/keccak"
"github.com/KalyCoinProject/kalychain/secrets"
"github.com/KalyCoinProject/kalychain/secrets/helper"
"github.com/KalyCoinProject/kalychain/types"
"github.com/KalyCoinProject/kalychain/validators"
"github.com/coinbase/kryptology/pkg/signatures/bls/bls_sig"
"github.com/umbracle/fastrlp"
)
const (
// legacyCommitCode is the value that is contained in
// legacy committed seals, so it needs to be preserved in order
// for new clients to read old committed seals
legacyCommitCode = 2
)
// wrapCommitHash calculates digest for CommittedSeal
func wrapCommitHash(data []byte) []byte {
return crypto.Keccak256(data, []byte{byte(legacyCommitCode)})
}
// getOrCreateECDSAKey loads ECDSA key or creates a new key
func getOrCreateECDSAKey(manager secrets.SecretsManager) (*ecdsa.PrivateKey, error) {
if !manager.HasSecret(secrets.ValidatorKey) {
if _, err := helper.InitECDSAValidatorKey(manager); err != nil {
return nil, err
}
}
keyBytes, err := manager.GetSecret(secrets.ValidatorKey)
if err != nil {
return nil, err
}
return crypto.BytesToECDSAPrivateKey(keyBytes)
}
// getOrCreateECDSAKey loads BLS key or creates a new key
func getOrCreateBLSKey(manager secrets.SecretsManager) (*bls_sig.SecretKey, error) {
if !manager.HasSecret(secrets.ValidatorBLSKey) {
if _, err := helper.InitBLSValidatorKey(manager); err != nil {
return nil, err
}
}
keyBytes, err := manager.GetSecret(secrets.ValidatorBLSKey)
if err != nil {
return nil, err
}
return crypto.BytesToBLSSecretKey(keyBytes)
}
// calculateHeaderHash is hash calculation of header for IBFT
func calculateHeaderHash(h *types.Header) types.Hash {
arena := fastrlp.DefaultArenaPool.Get()
defer fastrlp.DefaultArenaPool.Put(arena)
vv := arena.NewArray()
vv.Set(arena.NewBytes(h.ParentHash.Bytes()))
vv.Set(arena.NewBytes(h.Sha3Uncles.Bytes()))
vv.Set(arena.NewCopyBytes(h.Miner))
vv.Set(arena.NewBytes(h.StateRoot.Bytes()))
vv.Set(arena.NewBytes(h.TxRoot.Bytes()))
vv.Set(arena.NewBytes(h.ReceiptsRoot.Bytes()))
vv.Set(arena.NewBytes(h.LogsBloom[:]))
vv.Set(arena.NewUint(h.Difficulty))
vv.Set(arena.NewUint(h.Number))
vv.Set(arena.NewUint(h.GasLimit))
vv.Set(arena.NewUint(h.GasUsed))
vv.Set(arena.NewUint(h.Timestamp))
vv.Set(arena.NewCopyBytes(h.ExtraData))
buf := keccak.Keccak256Rlp(nil, vv)
return types.BytesToHash(buf)
}
// ecrecover recovers signer address from the given digest and signature
func ecrecover(sig, msg []byte) (types.Address, error) {
pub, err := crypto.RecoverPubkey(sig, msg)
if err != nil {
return types.Address{}, err
}
return crypto.PubKeyToAddress(pub), nil
}
// NewKeyManagerFromType creates KeyManager based on the given type
func NewKeyManagerFromType(
secretManager secrets.SecretsManager,
validatorType validators.ValidatorType,
) (KeyManager, error) {
switch validatorType {
case validators.ECDSAValidatorType:
return NewECDSAKeyManager(secretManager)
case validators.BLSValidatorType:
return NewBLSKeyManager(secretManager)
default:
return nil, fmt.Errorf("unsupported validator type: %s", validatorType)
}
}
// verifyIBFTExtraSize checks whether header.ExtraData has enough size for IBFT Extra
func verifyIBFTExtraSize(header *types.Header) error {
if len(header.ExtraData) < IstanbulExtraVanity {
return fmt.Errorf(
"wrong extra size, expected greater than or equal to %d but actual %d",
IstanbulExtraVanity,
len(header.ExtraData),
)
}
return nil
}
// UseIstanbulHeaderHash is a helper function for the test
func UseIstanbulHeaderHashInTest(t *testing.T, signer Signer) {
t.Helper()
originalHashCalc := types.HeaderHash
types.HeaderHash = func(h *types.Header) types.Hash {
hash, err := signer.CalculateHeaderHash(h)
if err != nil {
return types.ZeroHash
}
return hash
}
t.Cleanup(func() {
types.HeaderHash = originalHashCalc
})
}