wip

go.mod

@@ -0,0 +1,3 @@
+module github.com/0xPolygon/cdk
+
+go 1.19

pkg/dataavailability/config.go

@@ -0,0 +1,9 @@
+package dataavailability
+
+// DABackendType is the data availability protocol for the CDK
+type DABackendType string
+
+const (
+	// DataAvailabilityCommittee is the DAC protocol backend
+	DataAvailabilityCommittee DABackendType = "DataAvailabilityCommittee"
+)

pkg/dataavailability/dataavailability.go

@@ -1,6 +1,28 @@
 package dataavailability
 
-type DataAvailability interface {
-	GetData() []byte
-	PostDara(data []byte) error
+import (
+	"context"
+
+	"github.com/umbracle/ethgo"
+)
+
+// DABackender is an interface for components that store and retrieve batch data
+type DABackender interface {
+	SequenceRetriever
+	SequenceSender
+	// Init initializes the DABackend
+	Init() error
+}
+
+// SequenceSender is used to send provided sequence of batches
+type SequenceSender interface {
+	// PostSequence sends the sequence data to the data availability backend, and returns the dataAvailabilityMessage
+	// as expected by the contract
+	PostSequence(ctx context.Context, batchesData [][]byte) ([]byte, error)
+}
+
+// SequenceRetriever is used to retrieve batch data
+type SequenceRetriever interface {
+	// GetSequence retrieves the sequence data from the data availability backend
+	GetSequence(ctx context.Context, batchHashes []ethgo.Hash, dataAvailabilityMessage []byte) ([][]byte, error)
 }

pkg/syncer/ethsyncer/ethsyncer.go

@@ -6,6 +6,6 @@ import (
 )
 
 type EthSyncer struct {
-	Storage          storage.Storage
-	DataAvailability dataavailability.DataAvailability
+	Storage          storage.StorageService
+	DataAvailability dataavailability.DataAvailabilityService
 }