work package bundle

Blockchain/Sources/Blockchain/Types/WorkPackageBundle.swift

@@ -0,0 +1,10 @@
+import Foundation
+import Utils
+
+// All the necessary data to audit a work package. Stored in audits DA
+public struct WorkPackageBundle: Sendable, Equatable, Codable {
+    public var workPackage: WorkPackage
+    public var extrinsic: [Data]
+    public var importSegments: [[Data]]
+    public var justifications: [[Data]]
+}

Blockchain/Sources/Blockchain/Validator/DataAvailability.swift

@@ -30,5 +30,25 @@ public final class DataAvailability: ServiceBase2, @unchecked Sendable {
 
     public func purge(epoch _: EpochIndex) async {
         // TODO: purge data
+        // GP 14.3.1
+        // Guarantors are required to erasure-code and distribute two data sets: one blob, the auditable work-package containing
+        // the encoded work-package, extrinsic data and self-justifying imported segments which is placed in the short-term Audit
+        // da store and a second set of exported-segments data together with the Paged-Proofs metadata. Items in the first store
+        // are short-lived; assurers are expected to keep them only until finality of the block in which the availability of the work-
+        // result’s work-package is assured. Items in the second, meanwhile, are long-lived and expected to be kept for a minimum
+        // of 28 days (672 complete epochs) following the reporting of the work-report.
+    }
+
+    public func fetchSegment(root _: Data32, index _: UInt16) async throws -> Data? {
+        // TODO: fetch segment
+        nil
+    }
+
+    public func exportSegments(data _: [Data]) async throws {
+        // TODO: export segments
+    }
+
+    public func distributeWorkpackageBundle(bundle _: WorkPackageBundle) async throws {
+        // TODO: distribute workpackage bundle to audits DA
     }
 }