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mock.go
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mock.go
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package mock
import (
"context"
"crypto/rand"
"encoding/binary"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"path/filepath"
"sync/atomic"
"time"
"github.com/libp2p/go-libp2p/core/crypto"
tmp2p "github.com/tendermint/tendermint/p2p"
"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
rollapptypes "github.com/dymensionxyz/dymension/x/rollapp/types"
"github.com/dymensionxyz/dymint/da"
"github.com/dymensionxyz/dymint/log"
"github.com/dymensionxyz/dymint/settlement"
"github.com/dymensionxyz/dymint/store"
"github.com/dymensionxyz/dymint/types"
"github.com/tendermint/tendermint/libs/pubsub"
)
const kvStoreDBName = "settlement"
var settlementKVPrefix = []byte{0}
var slStateIndexKey = []byte("slStateIndex")
// LayerClient is an extension of the base settlement layer client
// for usage in tests and local development.
type LayerClient struct {
*settlement.BaseLayerClient
}
var _ settlement.LayerI = (*LayerClient)(nil)
// Init initializes the mock layer client.
func (m *LayerClient) Init(config settlement.Config, pubsub *pubsub.Server, logger log.Logger, options ...settlement.Option) error {
HubClientMock, err := newHubClient(config, pubsub, logger)
if err != nil {
return err
}
baseOptions := []settlement.Option{
settlement.WithHubClient(HubClientMock),
}
if options == nil {
options = baseOptions
} else {
options = append(baseOptions, options...)
}
m.BaseLayerClient = &settlement.BaseLayerClient{}
err = m.BaseLayerClient.Init(config, pubsub, logger, options...)
if err != nil {
return err
}
return nil
}
// HubClient implements The HubClient interface
type HubClient struct {
ProposerPubKey string
slStateIndex uint64
logger log.Logger
pubsub *pubsub.Server
latestHeight uint64
settlementKV store.KVStore
}
var _ settlement.HubClient = &HubClient{}
func newHubClient(config settlement.Config, pubsub *pubsub.Server, logger log.Logger) (*HubClient, error) {
latestHeight := uint64(0)
slStateIndex := uint64(0)
slstore, proposer, err := initConfig(config)
if err != nil {
return nil, err
}
settlementKV := store.NewPrefixKV(slstore, settlementKVPrefix)
b, err := settlementKV.Get(slStateIndexKey)
if err == nil {
slStateIndex = binary.BigEndian.Uint64(b)
// Get the latest height from the stateIndex
var settlementBatch rollapptypes.MsgUpdateState
b, err := settlementKV.Get(getKey(slStateIndex))
if err != nil {
return nil, err
}
err = json.Unmarshal(b, &settlementBatch)
if err != nil {
return nil, errors.New("error unmarshalling batch")
}
latestHeight = settlementBatch.StartHeight + settlementBatch.NumBlocks - 1
}
return &HubClient{
ProposerPubKey: proposer,
logger: logger,
pubsub: pubsub,
latestHeight: latestHeight,
slStateIndex: slStateIndex,
settlementKV: settlementKV,
}, nil
}
func initConfig(conf settlement.Config) (slstore store.KVStore, proposer string, err error) {
if conf.KeyringHomeDir == "" {
//init store
slstore = store.NewDefaultInMemoryKVStore()
//init proposer pub key
if conf.ProposerPubKey != "" {
proposer = conf.ProposerPubKey
} else {
_, proposerPubKey, err := crypto.GenerateEd25519Key(rand.Reader)
if err != nil {
return nil, "", err
}
pubKeybytes, err := proposerPubKey.Raw()
if err != nil {
return nil, "", err
}
proposer = hex.EncodeToString(pubKeybytes)
}
} else {
slstore = store.NewDefaultKVStore(conf.KeyringHomeDir, "data", kvStoreDBName)
fmt.Println("Setting proposarkeypath", "path", conf.KeyringHomeDir)
proposerKeyPath := filepath.Join(conf.KeyringHomeDir, "config/priv_validator_key.json")
key, err := tmp2p.LoadOrGenNodeKey(proposerKeyPath)
if err != nil {
return nil, "", err
}
proposer = hex.EncodeToString(key.PubKey().Bytes())
}
return
}
// Start starts the mock client
func (c *HubClient) Start() error {
c.logger.Info("Starting mock settlement")
return nil
}
// Stop stops the mock client
func (c *HubClient) Stop() error {
return nil
}
// PostBatch saves the batch to the kv store
func (c *HubClient) PostBatch(batch *types.Batch, daClient da.Client, daResult *da.ResultSubmitBatch) {
settlementBatch := c.convertBatchtoSettlementBatch(batch, daClient, daResult)
c.saveBatch(settlementBatch)
go func() {
// sleep for 10 miliseconds to mimic a delay in batch acceptance
time.Sleep(10 * time.Millisecond)
err := c.pubsub.PublishWithEvents(context.Background(), &settlement.EventDataNewSettlementBatchAccepted{EndHeight: settlementBatch.EndHeight}, map[string][]string{settlement.EventTypeKey: {settlement.EventNewSettlementBatchAccepted}})
if err != nil {
panic(err)
}
}()
}
// GetLatestBatch returns the latest batch from the kv store
func (c *HubClient) GetLatestBatch(rollappID string) (*settlement.ResultRetrieveBatch, error) {
c.logger.Info("GetLatestBatch", "index", c.slStateIndex)
batchResult, err := c.GetBatchAtIndex(rollappID, atomic.LoadUint64(&c.slStateIndex))
if err != nil {
return nil, err
}
return batchResult, nil
}
// GetBatchAtIndex returns the batch at the given index
func (c *HubClient) GetBatchAtIndex(rollappID string, index uint64) (*settlement.ResultRetrieveBatch, error) {
batchResult, err := c.retrieveBatchAtStateIndex(index)
if err != nil {
return &settlement.ResultRetrieveBatch{
BaseResult: settlement.BaseResult{Code: settlement.StatusError, Message: err.Error()},
}, err
}
return batchResult, nil
}
// GetSequencers returns a list of sequencers. Currently only returns a single sequencer
func (c *HubClient) GetSequencers(rollappID string) ([]*types.Sequencer, error) {
pubKeyBytes, err := hex.DecodeString(c.ProposerPubKey)
if err != nil {
return nil, err
}
var pubKey cryptotypes.PubKey = &ed25519.PubKey{Key: pubKeyBytes}
return []*types.Sequencer{
{
PublicKey: pubKey,
Status: types.Proposer,
},
}, nil
}
func (c *HubClient) saveBatch(batch *settlement.Batch) {
c.logger.Debug("Saving batch to settlement layer", "start height",
batch.StartHeight, "end height", batch.EndHeight)
b, err := json.Marshal(batch)
if err != nil {
panic(err)
}
// Save the batch to the next state index
slStateIndex := atomic.LoadUint64(&c.slStateIndex)
err = c.settlementKV.Set(getKey(slStateIndex+1), b)
if err != nil {
panic(err)
}
// Save SL state index in memory and in store
atomic.StoreUint64(&c.slStateIndex, slStateIndex+1)
b = make([]byte, 8)
binary.BigEndian.PutUint64(b, slStateIndex+1)
err = c.settlementKV.Set(slStateIndexKey, b)
if err != nil {
panic(err)
}
// Save latest height in memory and in store
atomic.StoreUint64(&c.latestHeight, batch.EndHeight)
}
func (c *HubClient) convertBatchtoSettlementBatch(batch *types.Batch, daClient da.Client, daResult *da.ResultSubmitBatch) *settlement.Batch {
settlementBatch := &settlement.Batch{
StartHeight: batch.StartHeight,
EndHeight: batch.EndHeight,
MetaData: &settlement.BatchMetaData{
DA: &settlement.DAMetaData{
Height: daResult.DAHeight,
Client: daClient,
},
},
}
for _, block := range batch.Blocks {
settlementBatch.AppHashes = append(settlementBatch.AppHashes, block.Header.AppHash)
}
return settlementBatch
}
func (c *HubClient) retrieveBatchAtStateIndex(slStateIndex uint64) (*settlement.ResultRetrieveBatch, error) {
b, err := c.settlementKV.Get(getKey(slStateIndex))
c.logger.Debug("Retrieving batch from settlement layer", "SL state index", slStateIndex)
if err != nil {
c.logger.Error("Error batch not found", err.Error())
return nil, settlement.ErrBatchNotFound
}
var settlementBatch settlement.Batch
err = json.Unmarshal(b, &settlementBatch)
if err != nil {
return nil, errors.New("error unmarshalling batch")
}
batchResult := settlement.ResultRetrieveBatch{
BaseResult: settlement.BaseResult{Code: settlement.StatusSuccess, StateIndex: slStateIndex},
Batch: &settlementBatch,
}
return &batchResult, nil
}
func getKey(key uint64) []byte {
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, key)
return b
}