Make the pki node pin the pki in ipfs!!!

Add a util for checking the state of pins.

src/peergos/server/Main.java

@@ -379,7 +379,7 @@ public static void startPeergos(Args a) {
             // build a mirroring proxying corenode, unless we are the pki node
             boolean isPkiNode = nodeId.equals(pkiServerNodeId);
             CoreNode core = isPkiNode ?
-                    buildPkiCorenode(localPointers, localDht, a) :
+                    buildPkiCorenode(new PinningMutablePointers(localPointers, localDht), localDht, a) :
                     new MirrorCoreNode(new HTTPCoreNode(ipfsGateway, pkiServerNodeId), proxingMutable, localDht,
                             peergosId, a.fromPeergosDir("pki-mirror-state-path","pki-state.cbor"));
 

src/peergos/server/PinChecker.java

@@ -0,0 +1,60 @@
+package peergos.server;
+
+import peergos.server.storage.*;
+import peergos.shared.*;
+import peergos.shared.corenode.*;
+import peergos.shared.crypto.hash.*;
+import peergos.shared.io.ipfs.multihash.*;
+import peergos.shared.user.*;
+
+import java.net.*;
+import java.util.*;
+import java.util.stream.*;
+
+/** This is utility to check that all the things we think should be pinned on the current node actually are.
+ *
+ */
+public class PinChecker {
+
+    public static void main(String[] args) throws Exception {
+        Crypto.initJava();
+
+        IPFS ipfs = new IPFS("localhost", 5001);
+        Set<Multihash> allPins = ipfs.pin.ls(IPFS.PinType.recursive).keySet();
+
+        NetworkAccess network = NetworkAccess.buildJava(new URL("http://localhost:8000")).get();
+        List<String> usernames = network.coreNode.getUsernames("").join();
+        Multihash id = network.dhtClient.id().join();
+        for (String username : usernames) {
+            List<UserPublicKeyLink> chain = network.coreNode.getChain(username).join();
+            if (chain.isEmpty()) {
+                System.out.println("Ignoring user with empty chain: " + username);
+                continue;
+            }
+            UserPublicKeyLink current = chain.get(chain.size() - 1);
+            Multihash storageNode = current.claim.storageProviders.get(0);
+            if (! id.equals(storageNode)) {
+                System.out.println("Ignoring user from different server " + username);
+                continue;
+            }
+
+            PublicKeyHash owner = current.owner;
+            try {
+                Set<PublicKeyHash> allWriters = WriterData.getOwnedKeysRecursive(owner, owner, network.mutable, network.dhtClient).join();
+                Set<Multihash> allRoots = allWriters.stream()
+                        .map(w -> network.mutable.getPointerTarget(owner, w, network.dhtClient).join())
+                        .filter(m -> m.isPresent())
+                        .map(m -> m.get())
+                        .collect(Collectors.toSet());
+
+                HashSet<Multihash> missing = new HashSet<>(allRoots);
+                missing.removeAll(allPins);
+                if (!missing.isEmpty())
+                    System.out.println("Missing " + missing.size() + " pins for " + username + " - " + missing);
+            } catch (Throwable t) {
+                System.err.println("Error handling user: " + username);
+                t.printStackTrace();
+            }
+        }
+    }
+}