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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| package l1 | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "math/big" | ||
|
|
||
| "github.com/ethereum/go-ethereum/accounts/abi/bind" | ||
| gethcommon "github.com/ethereum/go-ethereum/common" | ||
| gethlog "github.com/ethereum/go-ethereum/log" | ||
| "github.com/ten-protocol/go-ten/contracts/generated/ManagementContract" | ||
| "github.com/ten-protocol/go-ten/go/common" | ||
| "github.com/ten-protocol/go-ten/go/common/errutil" | ||
| "github.com/ten-protocol/go-ten/go/common/host" | ||
| "github.com/ten-protocol/go-ten/go/common/stopcontrol" | ||
| "github.com/ten-protocol/go-ten/go/ethadapter" | ||
| "github.com/ten-protocol/go-ten/go/ethadapter/mgmtcontractlib" | ||
| ) | ||
|
|
||
| type ForkUniqueID = gethcommon.Hash | ||
| type RollupNumber = uint64 | ||
|
|
||
| type CrossChainStateMachine interface { | ||
| GetRollupData(number RollupNumber) (RollupInfo, error) | ||
| Synchronize() error | ||
| PublishNextBundle() error | ||
| host.Service | ||
| } | ||
|
|
||
| type crossChainStateMachine struct { | ||
| latestRollup RollupInfo | ||
| rollupHistory map[RollupNumber]RollupInfo | ||
| currentRollup RollupNumber | ||
|
|
||
| enclaveClient common.Enclave | ||
| publisher host.L1Publisher | ||
| ethClient ethadapter.EthClient | ||
| mgmtContractLib mgmtcontractlib.MgmtContractLib // Library to handle Management Contract lib operations | ||
| logger gethlog.Logger | ||
| hostStopper *stopcontrol.StopControl | ||
| } | ||
|
|
||
| type RollupInfo struct { | ||
| Hash gethcommon.Hash | ||
| ForkUID ForkUniqueID | ||
| Number RollupNumber | ||
| } | ||
|
|
||
| func NewCrossChainStateMachine( | ||
| publisher host.L1Publisher, | ||
| mgmtContractLib mgmtcontractlib.MgmtContractLib, | ||
| ethClient ethadapter.EthClient, | ||
| enclaveClient common.Enclave, | ||
| logger gethlog.Logger, | ||
| hostStopper *stopcontrol.StopControl, | ||
| ) CrossChainStateMachine { | ||
| return &crossChainStateMachine{ | ||
| latestRollup: RollupInfo{ | ||
| Hash: gethcommon.Hash{}, | ||
| ForkUID: gethcommon.Hash{}, | ||
| Number: 0, | ||
| }, | ||
| rollupHistory: make(map[RollupNumber]RollupInfo), | ||
| currentRollup: 0, | ||
| publisher: publisher, | ||
| ethClient: ethClient, | ||
| mgmtContractLib: mgmtContractLib, | ||
| enclaveClient: enclaveClient, | ||
| logger: logger, | ||
| hostStopper: hostStopper, | ||
| } | ||
| } | ||
|
|
||
| func (c *crossChainStateMachine) Start() error { | ||
| return nil | ||
| } | ||
| func (c *crossChainStateMachine) Stop() error { | ||
| return nil | ||
| } | ||
| func (c *crossChainStateMachine) HealthStatus(context.Context) host.HealthStatus { | ||
| errMsg := "" | ||
| if c.hostStopper.IsStopping() { | ||
| errMsg = "not running" | ||
| } | ||
| return &host.BasicErrHealthStatus{ErrMsg: errMsg} | ||
|
|
||
| } | ||
|
|
||
| func (c *crossChainStateMachine) GetRollupData(number RollupNumber) (RollupInfo, error) { | ||
| if number == c.latestRollup.Number { | ||
| return c.latestRollup, nil | ||
| } else if number > c.latestRollup.Number { | ||
| return RollupInfo{}, errutil.ErrNotFound | ||
| } else { | ||
| return c.rollupHistory[number], nil | ||
| } | ||
| } | ||
|
|
||
| func (c *crossChainStateMachine) PublishNextBundle() error { | ||
| // If all bundles for the rollups have been published, there is nothing to do. | ||
| if c.currentRollup >= c.latestRollup.Number { | ||
| return nil | ||
| } | ||
|
|
||
| // Get the bundle range from the management contract | ||
| nextForkUID, begin, end, err := c.publisher.GetBundleRangeFromManagementContract(big.NewInt(0).SetUint64(c.currentRollup), c.latestRollup.ForkUID) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| data, err := c.GetRollupData(c.currentRollup + 1) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if data.ForkUID != *nextForkUID { | ||
| return errutil.ErrRollupForkMismatch | ||
| } | ||
|
|
||
| bundle, err := c.enclaveClient.ExportCrossChainData(context.Background(), begin.Uint64(), end.Uint64()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| err = c.publisher.PublishCrossChainBundle(bundle) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Move the current rollup to the next rollup | ||
| c.currentRollup++ | ||
|
|
||
| return nil | ||
|
|
||
| } | ||
|
|
||
| // Synchronize - checks if there are any new rollups or forks and moves the tracking needle to the latest common ancestor. | ||
| func (c *crossChainStateMachine) Synchronize() error { | ||
|
|
||
| forkUID, _, _, err := c.publisher.GetBundleRangeFromManagementContract(big.NewInt(0).SetUint64(c.latestRollup.Number), c.latestRollup.ForkUID) | ||
| if err != nil { | ||
| if errors.Is(err, errutil.ErrNoNextRollup) { | ||
| c.logger.Debug("No new rollup or fork found") | ||
| return nil | ||
| } | ||
|
|
||
| if errors.Is(err, errutil.ErrRollupForkMismatch) { | ||
| return c.RevertToLatestKnownCommonAncestorRollup() | ||
| } | ||
|
|
||
| c.logger.Error("Failed to get bundle range from management contract", "error", err) | ||
| return err | ||
| } | ||
|
|
||
| c.rollupHistory[c.latestRollup.Number] = c.latestRollup | ||
| c.latestRollup = RollupInfo{ | ||
| Hash: gethcommon.Hash{}, | ||
| ForkUID: *forkUID, | ||
| Number: c.latestRollup.Number + 1, | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (c *crossChainStateMachine) RevertToLatestKnownCommonAncestorRollup() error { | ||
|
|
||
| managementContract, err := ManagementContract.NewManagementContract(*c.mgmtContractLib.GetContractAddr(), c.ethClient.EthClient()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| hashBytes, _, err := managementContract.GetUniqueForkID(&bind.CallOpts{}, big.NewInt(0).SetUint64(c.latestRollup.Number)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| var forkHash gethcommon.Hash | ||
| forkHash = gethcommon.BytesToHash(hashBytes[:]) | ||
|
|
||
| for forkHash != c.latestRollup.ForkUID { | ||
| // Revert to previous rollup; No need to wipe the map as the synchronization reinserts the latest rollup | ||
| c.latestRollup = c.rollupHistory[c.latestRollup.Number-1] //go to previous rollup | ||
|
|
||
| hashBytes, _, err = managementContract.GetUniqueForkID(&bind.CallOpts{}, big.NewInt(0).SetUint64(c.latestRollup.Number)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| forkHash = gethcommon.BytesToHash(hashBytes[:]) | ||
| } | ||
|
|
||
| // Rollback current rollup if it was dumped due to a fork. | ||
| if c.currentRollup > c.latestRollup.Number { | ||
| c.currentRollup = c.latestRollup.Number | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
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