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♻️ Implement initialization of fault detector
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| { | ||
| // Use IntelliSense to learn about possible attributes. | ||
| // Hover to view descriptions of existing attributes. | ||
| // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 | ||
| "version": "0.1.0", | ||
| "configurations": [ | ||
| { | ||
| "name": "Run Fault Detector", | ||
| "type": "go", | ||
| "request": "launch", | ||
| "mode": "auto", | ||
| "program": "${workspaceRoot}/cmd", | ||
| "args": ["--config", "./config.yaml"], | ||
| "showLog": true | ||
| } | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| // Package faultdetector implements Optimism fault detector | ||
| package faultdetector | ||
|
|
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| import ( | ||
| "context" | ||
| "math/big" | ||
| "sync" | ||
| "time" | ||
|
|
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| "github.com/LiskHQ/op-fault-detector/pkg/chain" | ||
| "github.com/LiskHQ/op-fault-detector/pkg/config" | ||
| "github.com/LiskHQ/op-fault-detector/pkg/log" | ||
| ) | ||
|
|
||
| const ( | ||
| SERVICE_INTERVAL_IN_SECS = 5 | ||
| ) | ||
|
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| // FaultDetector contains all the RPC providers/contract accessors and holds state information. | ||
| type FaultDetector struct { | ||
| ctx context.Context | ||
| logger log.Logger | ||
| errorChan chan error | ||
| wg *sync.WaitGroup | ||
| l1RpcApi *chain.ChainAPIClient | ||
| l2RpcApi *chain.ChainAPIClient | ||
| oracleContractAccessor *chain.OracleAccessor | ||
| faultProofWindow *big.Int | ||
| currentOutputIndex *big.Int | ||
| diverged bool | ||
| ticker *time.Ticker | ||
| } | ||
|
|
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| // NewFaultDetector will return [FaultDetector] with the initialized providers and configuration. | ||
| func NewFaultDetector(ctx context.Context, logger log.Logger, errorChan chan error, wg *sync.WaitGroup, config *config.Config) (*FaultDetector, error) { | ||
| faultDetectorConfig := config.FaultDetector | ||
|
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| // Initialize API Providers | ||
| l1RpcApi, err := chain.GetAPIClient(ctx, config.FaultDetector.L1RPCEndpoint, logger) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| l2RpcApi, err := chain.GetAPIClient(ctx, config.FaultDetector.L2RPCEndpoint, logger) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| l2ChainID, err := l2RpcApi.GetChainID(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // Initialize Oracle contract accessor | ||
| chainConfig := &chain.ConfigOptions{ | ||
| L1RPCEndpoint: faultDetectorConfig.L1RPCEndpoint, | ||
| ChainID: l2ChainID.Uint64(), | ||
| L2OutputOracleContractAddress: faultDetectorConfig.L2OutputOracleContractAddress, | ||
| } | ||
|
|
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| oracleContractAccessor, err := chain.NewOracleAccessor(ctx, chainConfig) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // TODO: Calculate from findFirstUnfinalizedOutputIndex(context, OracleContractAccessor, L1Provider, faultProofWindow, logger) | ||
|
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| faultDetector := &FaultDetector{ | ||
| ctx: ctx, | ||
| logger: logger, | ||
| errorChan: errorChan, | ||
| wg: wg, | ||
| l1RpcApi: l1RpcApi, | ||
| l2RpcApi: l2RpcApi, | ||
| oracleContractAccessor: oracleContractAccessor, | ||
| faultProofWindow: big.NewInt(int64(2)), // TODO | ||
| currentOutputIndex: big.NewInt(int64(2)), // TODO | ||
| diverged: false, | ||
| } | ||
|
|
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| return faultDetector, nil | ||
| } | ||
|
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| // Start will start the fault detector service by invoking the service every given interval. | ||
| func (fd *FaultDetector) Start() { | ||
| fd.logger.Infof("Started fault detector, checking for state root every %d.", SERVICE_INTERVAL_IN_SECS) | ||
| defer fd.wg.Done() | ||
| fd.ticker = time.NewTicker(SERVICE_INTERVAL_IN_SECS * time.Second) | ||
| quit := make(chan struct{}) | ||
| go func() { | ||
| for { | ||
| select { | ||
| case <-fd.ticker.C: | ||
| fd.service() | ||
| case <-quit: | ||
| fd.ticker.Stop() | ||
| fd.logger.Infof("Stopped fault detector service.") | ||
| return | ||
| } | ||
| } | ||
| }() | ||
| } | ||
|
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| // Stop will stop the ticker. | ||
| func (fd *FaultDetector) Stop() { | ||
| fd.ticker.Stop() | ||
| fd.logger.Infof("Successfully stopped fault detector service.") | ||
| } | ||
|
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| // TODO: Implement service to check for faults | ||
| func (fd *FaultDetector) service() { | ||
| l1ChainID, err := fd.l1RpcApi.GetChainID(fd.ctx) | ||
| if err != nil { | ||
| fd.errorChan <- err | ||
| } | ||
| l2ChainID, err := fd.l2RpcApi.GetChainID(fd.ctx) | ||
| if err != nil { | ||
| fd.errorChan <- err | ||
| } | ||
|
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| fd.logger.Infof("Connected to L1 chain with chainID: %d and L2 chain with chainID: %d", l1ChainID.Int64(), l2ChainID.Int64()) | ||
| } |