From c5bfcb8bd905038e8dfaadb5a63a264b916c5526 Mon Sep 17 00:00:00 2001
From: haad <haad@headbanggames.com>
Date: Thu, 2 Feb 2023 14:07:14 +0200
Subject: [PATCH] WIP 3

---
 benchmarks/append.js        |   5 +-
 dist/ipfslog.min.js         |   2 +-
 src/database.js             |  25 ++++++---
 src/events.js               |  10 +++-
 src/feed.js                 |  10 +++-
 src/ipfs-block-storage.js   |  10 +++-
 src/kv-persisted.js         |   6 +-
 src/kv.js                   |   3 +
 src/level-storage.js        |  36 ++++++------
 src/log.js                  |  15 ++++-
 src/lru-storage.js          |   8 +++
 src/memory-storage.js       |   8 +++
 test/events.spec.js         | 108 +++++++++++++-----------------------
 test/feed.spec.js           |  92 +++++++++++-------------------
 test/kv.spec.js             |  99 ++++++++++++---------------------
 test/log-references.spec.js |  26 ++++++---
 test/utils/wait-for.js      |  12 ++++
 17 files changed, 236 insertions(+), 239 deletions(-)
 create mode 100644 test/utils/wait-for.js

diff --git a/benchmarks/append.js b/benchmarks/append.js
index 76a2195..40f2257 100644
--- a/benchmarks/append.js
+++ b/benchmarks/append.js
@@ -22,9 +22,12 @@ const queryLoop = async () => {
   console.log('Starting benchmark...')
 
   const identity = await IdentityProvider.createIdentity({ id: 'userA' })
+  // MemoeryStorage is the default storage for Log but defining them here
+  // in case we want to benchmark different storage modules
   const storage = await MemoryStorage()
+  const stateStorage = await MemoryStorage()
 
-  log = await Log(identity, { logId: 'A', storage })
+  log = await Log(identity, { logId: 'A', storage, stateStorage })
 
   // Output metrics at 1 second interval
   setInterval(() => {
diff --git a/dist/ipfslog.min.js b/dist/ipfslog.min.js
index 78914965..2dae067 100644
--- a/dist/ipfslog.min.js
+++ b/dist/ipfslog.min.js
@@ -1 +1 @@
-var Log;(()=>{var e={187:e=>{"use strict";var t,n="object"==typeof Reflect?Reflect:null,r=n&&"function"==typeof n.apply?n.apply:function(e,t,n){return Function.prototype.apply.call(e,t,n)};t=n&&"function"==typeof n.ownKeys?n.ownKeys:Object.getOwnPropertySymbols?function(e){return Object.getOwnPropertyNames(e).concat(Object.getOwnPropertySymbols(e))}:function(e){return Object.getOwnPropertyNames(e)};var o=Number.isNaN||function(e){return e!=e};function i(){i.init.call(this)}e.exports=i,e.exports.once=function(e,t){return new Promise((function(n,r){function o(n){e.removeListener(t,i),r(n)}function i(){"function"==typeof e.removeListener&&e.removeListener("error",o),n([].slice.call(arguments))}y(e,t,i,{once:!0}),"error"!==t&&function(e,t,n){"function"==typeof e.on&&y(e,"error",t,{once:!0})}(e,o)}))},i.EventEmitter=i,i.prototype._events=void 0,i.prototype._eventsCount=0,i.prototype._maxListeners=void 0;var s=10;function a(e){if("function"!=typeof e)throw new TypeError('The "listener" argument must be of type Function. 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expected ${e.value})`);r?i.set(a,c):o[a]=c}return r?i:o}(n,e,t);if(n.type===re.tag){if(t.tags&&"function"==typeof t.tags[n.value]){const r=kt(e,t);return t.tags[n.value](r)}throw new Error(`${me} tag not supported (${n.value})`)}throw new Error("unsupported")}const xt={float64:!0,typeEncoders:{Object:function(e){if(e.asCID!==e&&e["/"]!==e.bytes)return null;const t=_.asCID(e);if(!t)return null;const n=new Uint8Array(t.bytes.byteLength+1);return n.set(t.bytes,1),[new oe(re.tag,42),new oe(re.bytes,n)]},undefined:function(){throw new Error("`undefined` is not supported by the IPLD Data Model and cannot be encoded")},number:function(e){if(Number.isNaN(e))throw new Error("`NaN` is not supported by the IPLD Data Model and cannot be encoded");if(e===1/0||e===-1/0)throw new Error("`Infinity` and `-Infinity` is not supported by the IPLD Data Model and cannot be encoded");return null}}},At={allowIndefinite:!1,coerceUndefinedToNull:!0,allowNaN:!1,allowInfinity:!1,allowBigInt:!0,strict:!0,useMaps:!1,rejectDuplicateMapKeys:!0,tags:[]};At.tags[42]=function(e){if(0!==e[0])throw new Error("Invalid CID for CBOR tag 42; expected leading 0x00");return _.decode(e.subarray(1))};const Ct="dag-cbor",jt=113,St=e=>{return t=e,n=xt,n=Object.assign({},ut,n),gt(t,ft,n);var t,n},It=e=>function(e,t){if(!(e instanceof Uint8Array))throw new Error(`${me} data to decode must be a Uint8Array`);const n=(t=Object.assign({},bt,t)).tokenizer||new vt(e,t),r=kt(n,t);if(r===mt)throw new Error(`${me} did not find any content to decode`);if(r===Et)throw new Error(`${me} got unexpected break`);if(!n.done())throw new Error(`${me} too many terminals, data makes no sense`);return r}(e,At),Ut=e=>async t=>new Uint8Array(await crypto.subtle.digest(e,t)),$t=G({name:"sha2-256",code:18,encode:Ut("SHA-256")}),Lt=(G({name:"sha2-512",code:19,encode:Ut("SHA-512")}),e),Bt=$t,Nt=N,Ot=e=>e&&void 0!==e.id&&void 0!==e.next&&void 0!==e.payload&&void 0!==e.v&&void 0!==e.clock&&void 0!==e.refs,Tt=async e=>{const{cid:t,bytes:n}=await ee({value:e,codec:Lt,hasher:Bt}),r=t.toString(Nt),o=new i(e.clock.id,e.clock.time);return{...e,clock:o,hash:r,bytes:n}},Mt={create:async(e,t,n,r=null,o=[],a=[])=>{if(!s(e))throw new Error("Identity is required, cannot create entry");if(!s(t))throw new Error("Entry requires an id");if(!s(n))throw new Error("Entry requires a payload");if(!s(o)||!Array.isArray(o))throw new Error("'next' argument is not an array");const c={id:t,payload:n,next:o,refs:a,clock:r=r||new i(e.publicKey),v:2},{bytes:u}=await ee({value:c,codec:Lt,hasher:Bt}),f=await e.provider.sign(e,u);return c.key=e.publicKey,c.identity=e.toJSON(),c.sig=f,Tt(c)},verify:async(e,t)=>{if(!e)throw new Error("Identity-provider is required, cannot verify entry");if(!Ot(t))throw new Error("Invalid Log entry");if(!t.key)throw new Error("Entry doesn't have a key");if(!t.sig)throw new Error("Entry doesn't have a signature");const n={id:t.id,payload:t.payload,next:t.next,refs:t.refs,clock:t.clock,v:t.v},{bytes:r}=await ee({value:n,codec:Lt,hasher:Bt});return e.verify(t.sig,t.key,r)},decode:async e=>{const{value:t}=await async function({bytes:e,codec:t,hasher:n}){if(!e)throw new Error('Missing required argument "bytes"');if(!t||!n)throw new Error("Missing required argument: codec or hasher");const r=t.decode(e),o=await n.digest(e),i=_.create(1,t.code,o);return new Y({value:r,bytes:e,cid:i})}({bytes:e,codec:Lt,hasher:Bt});return Tt(t)},isEntry:Ot,isEqual:(e,t)=>e&&t&&e.hash===t.hash};function Dt(e,t,n){const r=i.compare(e.clock,t.clock);return 0===r?n(e,t):r}function _t(e,t,n){return e.clock.id===t.clock.id?n(e,t):e.clock.id<t.clock.id?-1:1}const zt={SortByClocks:Dt,SortByClockId:_t,LastWriteWins:function(e,t){const n=(e,t)=>e,r=(e,t)=>_t(e,t,n);return((e,t)=>Dt(e,t,r))(e,t)},NoZeroes:function(e){const t=`Your log's tiebreaker function, ${e.name}, has returned zero and therefore cannot be`;return(n,r)=>{const o=e(n,r);if(0===o)throw Error(t);return o}}},Pt=async({ipfs:e,timeout:t,pin:n})=>(t=t||3e4,{put:async(r,o)=>{const i=_.parse(r,N);await e.block.put(o,{cid:i.bytes,version:i.version,format:"dag-cbor",mhtype:"sha2-256",pin:n,timeout:t})},get:async n=>{const r=_.parse(n,N),o=await e.block.get(r,{timeout:t});if(o)return o},iterator:async function*(){},merge:async e=>{},clear:async()=>{},close:async()=>{}}),Rt=async()=>{let e={};const t=async(t,n)=>{e[t]=n};return{put:t,get:async t=>{if(e[t])return e[t]},iterator:async function*(){for await(const[t,n]of Object.entries(e))yield[t,n]},merge:async e=>{if(e)for await(const[n,r]of e.iterator())t(n,r)},clear:async()=>e={},close:async()=>{}}},Ft=1e6,Vt=async({size:e}={})=>{let n=new t(e||Ft);return{put:async(e,t)=>{n.set(e,t)},get:async e=>{if(n.peek(e))return n.get(e)},iterator:async function*(){for await(const e of n.keys){const t=n.get(e);yield[e,t]}},merge:async e=>{if(e)for await(const[t,r]of e.iterator())n.set(t,r)},clear:async()=>{n=new t(e||Ft)},close:async()=>{}}},qt=async(...e)=>({put:async(t,n)=>{for await(const r of e)await r.put(t,n)},get:async t=>{for await(const n of e){const e=await n.get(t);if(e)return e}},iterator:async function*(){return e[0].iterator()},merge:async t=>{for await(const t of e)for await(const n of e)await t.merge(n)},clear:async()=>{for await(const t of e)await t.clear()},close:async()=>{for await(const t of e)await t.close()}}),{LastWriteWins:Kt,NoZeroes:Gt}=zt,Wt=(e,t)=>Math.max(e,t.clock.time),Ht=Rt,Jt=async()=>({canAppend:async(e,t)=>!0}),Qt=async(e,{logId:n,logHeads:r,access:o,storage:a,stateStorage:c,sortFn:u}={})=>{if(!s(e))throw new Error("Identity is required");if(s(r)&&!Array.isArray(r))throw new Error("'logHeads' argument must be an array");const f=n||(new Date).getTime().toString();o=o||await Jt(),a=a||await Ht(),c=c||await Ht();const h=Zt(new Set(r||[]));for(const e of h)await c.put(e.hash,!0);u=Gt(u||Kt);const l=async()=>{const t=Math.max(0,(await d()).reduce(Wt,0));return new i(e.publicKey,t)},d=async()=>{const e=[];for await(const[t]of c.iterator())if(t){const n=await p(t);n&&e.push(n)}return e.sort(u).reverse()},p=async e=>{const t=await a.get(e);if(t)return await Mt.decode(t)},y=async t=>{const n=e.provider;if(t.id!==f)throw new Error(`Entry's id (${t.id}) doesn't match the log's id (${f}).`);const r=await d();if(r.find((e=>e.hash===t.hash)))return;if(!await o.canAppend(t,n))throw new Error(`Could not append entry:\nKey "${t.identity.id}" is not allowed to write to the log`);if(!await Mt.verify(n,t))throw new Error(`Could not validate signature for entry "${t.hash}"`);const i=Zt(new Set([...r,t]));await c.clear();for(const e of i)await c.put(e.hash,!0);return await a.put(t.hash,t.bytes),!0},w=async function*(e,t){t=t||(()=>!1);let n=(e=e||await d()).sort(u);const r={};let o;for(;n.length>0&&!0!==await t(o);)if(o=n.pop(),o&&!r[o.hash]){r[o.hash]=!0,yield o;for(const e of[...o.next,...o.refs])if(!r[e]){const t=await p(e);t&&(n=[t,...n].sort(u))}}};return{id:f,clock:l,heads:d,values:async()=>{const e=[];for await(const t of w())e.unshift(t);return e},get:p,append:async(t,n={pointerCount:1})=>{const r=await(async(e=1)=>{let t=2,n=0;const r=[],o=()=>n>=e;for await(const e of w(null,o))n++,n===t&&(e.hash&&r.push(e.hash),t*=2);return r})(n.pointerCount),i=(await d()).map((e=>e.hash)),s=await Mt.create(e,f,t,(await l()).tick(),i,r);if(!await o.canAppend(s,e.provider))throw new Error(`Could not append entry:\nKey "${e.id}" is not allowed to write to the log`);return await c.clear(),await c.put(s.hash,!0),await a.put(s.hash,s.bytes),s},join:async e=>{if(!e)throw new Error("Log instance not defined");if(!(t=e)||void 0===t.id||void 0===t.clock||void 0===t.heads||void 0===t.values||void 0===t.access||void 0===t.identity||void 0===t.storage)throw new Error("Given argument is not an instance of Log");var t;const n=await e.heads();for(const e of n)await y(e);a.merge&&await a.merge(e.storage)},joinEntry:y,traverse:w,iterator:async function*({amount:e=-1,gt:n,gte:r,lt:o,lte:i}={}){if(0===e)return;if("string"==typeof i&&(i=[await p(i)]),"string"==typeof o){const e=await p(o);o=await Promise.all(e.next.map((e=>p(e))))}if(s(o)&&!Array.isArray(o))throw new Error("lt must be a string or an array of Entries");if(s(i)&&!Array.isArray(i))throw new Error("lte must be a string or an array of Entries");const a=(o||i||await d()).filter(s),c=n||r?await p(n||r):null,u=c||-1===e?-1:i||o?e-1:e;let f=0;const h=c&&-1!==e&&!o&&!i,l=h?new t(e+2):null;let y=0;const g=w(a,(async e=>!!e&&(f>=u&&-1!==u||!(!c||!Mt.isEqual(e,c))||(f++,!1))));for await(const e of g){const t=o&&Mt.isEqual(e,a),r=n&&Mt.isEqual(e,c);t||r||(h?l.set(y++,e.hash):yield e)}if(h){const t=l.keys.length-1,n=t-e,r=l.keys.slice(n,t);for(const e of r){const t=l.get(e),n=await p(t);yield n}}},access:o,identity:e,storage:a}},Zt=e=>{const t={};for(const n of e)for(const e of n.next)t[e]=n.hash;const n=[];for(const r of e)t[r.hash]||n.push(r);return n}})(),Log=r})();
\ No newline at end of file
diff --git a/src/database.js b/src/database.js
index 3fd2b37..d697256 100644
--- a/src/database.js
+++ b/src/database.js
@@ -2,14 +2,14 @@ import { Level } from 'level'
 import { EventEmitter } from 'events'
 
 const valueEncoding = 'view'
-const defaultPointerCount = 64
+const defaultPointerCount = 16
 
 const Database = async ({ OpLog, ipfs, identity, databaseId, accessController, storage }) => {
   const { Log, Entry, IPFSBlockStorage } = OpLog
 
   storage = storage || await IPFSBlockStorage({ ipfs, pin: true })
 
-  const path = `./${identity.id}/${databaseId}_state`
+  const path = `./${identity.id}/${databaseId}/_state`
   const stateStorage = new Level(path, { valueEncoding })
   await stateStorage.open()
 
@@ -26,23 +26,26 @@ const Database = async ({ OpLog, ipfs, identity, databaseId, accessController, s
 
   const handleMessage = async (message) => {
     const { id: peerId } = await ipfs.id()
-    const messageIsFromMe = (message) => String(peerId) === String(message.from)
+    const messageIsNotFromMe = (message) => String(peerId) !== String(message.from)
+    const messageHasData = (message) => message.data !== undefined
     try {
-      if (!messageIsFromMe(message)) {
+      if (messageIsNotFromMe(message) && messageHasData(message)) {
         await sync(message.data)
       }
     } catch (e) {
       events.emit('error', e)
-      // console.error(e)
+      console.error(e)
     }
   }
 
   const sync = async (bytes) => {
     const entry = await Entry.decode(bytes)
-    events.emit('sync', entry)
-    const updated = await log.joinEntry(entry)
-    if (updated) {
-      events.emit('update', entry)
+    if (entry) {
+      events.emit('sync', entry)
+      const updated = await log.joinEntry(entry)
+      if (updated) {
+        events.emit('update', entry)
+      }
     }
   }
 
@@ -53,11 +56,14 @@ const Database = async ({ OpLog, ipfs, identity, databaseId, accessController, s
     events.emit('close')
   }
 
+  // TODO: rename to clear()
   const drop = async () => {
     await stateStorage.clear()
     await storage.clear()
   }
 
+  const merge = async (other) => {}
+
   // Automatically subscribe to the pubsub channel for this database
   await ipfs.pubsub.subscribe(log.id, handleMessage)
 
@@ -65,6 +71,7 @@ const Database = async ({ OpLog, ipfs, identity, databaseId, accessController, s
     databaseId,
     identity,
     sync,
+    merge,
     close,
     drop,
     addOperation,
diff --git a/src/events.js b/src/events.js
index e0f6ec6..c2692a6 100644
--- a/src/events.js
+++ b/src/events.js
@@ -3,17 +3,22 @@ const EventStore = async ({ OpLog, Database, ipfs, identity, databaseId, accessC
 
   const { addOperation, log } = database
 
+  const put = async (key = null, value) => {
+    return add(value)
+  }
+
   const add = async (value) => {
     return addOperation({ op: 'ADD', key: null, value })
   }
 
   const get = async (hash) => {
     const entry = await log.get(hash)
-    return entry.payload
+    return entry.payload.value
   }
 
   const iterator = async function * ({ gt, gte, lt, lte, amount } = {}) {
-    for await (const event of log.iterator({ gt, gte, lt, lte, amount })) {
+    const it = log.iterator({ gt, gte, lt, lte, amount })
+    for await (const event of it) {
       yield event.payload.value
     }
   }
@@ -29,6 +34,7 @@ const EventStore = async ({ OpLog, Database, ipfs, identity, databaseId, accessC
   return {
     ...database,
     type: 'events',
+    put,
     add,
     get,
     iterator,
diff --git a/src/feed.js b/src/feed.js
index 7dcb9e9..bebec5c 100644
--- a/src/feed.js
+++ b/src/feed.js
@@ -3,6 +3,10 @@ const Feed = async ({ OpLog, Database, ipfs, identity, databaseId, accessControl
 
   const { addOperation, log } = database
 
+  const put = async (key = null, value) => {
+    return add(value)
+  }
+
   const add = async (value) => {
     return addOperation({ op: 'ADD', key: null, value })
   }
@@ -13,12 +17,13 @@ const Feed = async ({ OpLog, Database, ipfs, identity, databaseId, accessControl
 
   const get = async (hash) => {
     const entry = await log.get(hash)
-    return entry.payload
+    return entry.payload.value
   }
 
   const iterator = async function * ({ gt, gte, lt, lte, amount } = {}) {
     const deleted = {}
-    for await (const entry of log.iterator({ gt, gte, lt, lte, amount })) {
+    const it = log.iterator({ gt, gte, lt, lte, amount })
+    for await (const entry of it) {
       const { hash, payload } = entry
       const { op, key, value } = payload
       if (op === 'ADD' && !deleted[hash]) {
@@ -40,6 +45,7 @@ const Feed = async ({ OpLog, Database, ipfs, identity, databaseId, accessControl
   return {
     ...database,
     type: 'feed',
+    put,
     add,
     del,
     get,
diff --git a/src/ipfs-block-storage.js b/src/ipfs-block-storage.js
index f4169a9..0bd8cf4 100644
--- a/src/ipfs-block-storage.js
+++ b/src/ipfs-block-storage.js
@@ -3,7 +3,7 @@ import { base58btc } from 'multiformats/bases/base58'
 
 const defaultTimeout = 30000
 
-const IPFSBlockStorage = async ({ ipfs, timeout, pin }) => {
+const IPFSBlockStorage = async ({ ipfs, timeout, pin } = {}) => {
   timeout = timeout || defaultTimeout
 
   const put = async (hash, data) => {
@@ -18,6 +18,10 @@ const IPFSBlockStorage = async ({ ipfs, timeout, pin }) => {
     })
   }
 
+  const del = async (hash) => {
+    // TODO?
+  }
+
   const get = async (hash) => {
     const cid = CID.parse(hash, base58btc)
     const block = await ipfs.block.get(cid, { timeout })
@@ -28,6 +32,8 @@ const IPFSBlockStorage = async ({ ipfs, timeout, pin }) => {
 
   const iterator = async function * () {}
 
+  // TODO: all()
+
   const merge = async (other) => {}
 
   const clear = async () => {}
@@ -36,8 +42,10 @@ const IPFSBlockStorage = async ({ ipfs, timeout, pin }) => {
 
   return {
     put,
+    del,
     get,
     iterator,
+    // TODO: all,
     merge,
     clear,
     close
diff --git a/src/kv-persisted.js b/src/kv-persisted.js
index 9d9cc6a..deaa629 100644
--- a/src/kv-persisted.js
+++ b/src/kv-persisted.js
@@ -6,7 +6,7 @@ const KeyValuePersisted = async ({ KeyValue, OpLog, Database, ipfs, identity, da
   const keyValueStore = await KeyValue({ OpLog, Database, ipfs, identity, databaseId, accessController, storage })
   const { events, log } = keyValueStore
 
-  const path = `./${identity.id}/${databaseId}_index`
+  const path = `./${identity.id}/${databaseId}/_index`
   const index = new Level(path, { valueEncoding })
   await index.open()
 
@@ -45,12 +45,15 @@ const KeyValuePersisted = async ({ KeyValue, OpLog, Database, ipfs, identity, da
     }
   }
 
+  // TODO: all()
+
   const close = async () => {
     events.off('update', updateIndex(index))
     await index.close()
     await keyValueStore.close()
   }
 
+  // TOD: rename to clear()
   const drop = async () => {
     events.off('update', updateIndex(index))
     await index.clear()
@@ -64,6 +67,7 @@ const KeyValuePersisted = async ({ KeyValue, OpLog, Database, ipfs, identity, da
     ...keyValueStore,
     get,
     iterator,
+    // TODO: all,
     close,
     drop
   }
diff --git a/src/kv.js b/src/kv.js
index d8f2267..6160d7b 100644
--- a/src/kv.js
+++ b/src/kv.js
@@ -35,6 +35,8 @@ const KeyValue = async ({ OpLog, Database, ipfs, identity, databaseId, accessCon
     }
   }
 
+  // TODO: all()
+
   return {
     ...database,
     type: 'kv',
@@ -43,6 +45,7 @@ const KeyValue = async ({ OpLog, Database, ipfs, identity, databaseId, accessCon
     del,
     get,
     iterator
+    // TODO: all,
   }
 }
 
diff --git a/src/level-storage.js b/src/level-storage.js
index 989a230..1c84a44 100644
--- a/src/level-storage.js
+++ b/src/level-storage.js
@@ -1,6 +1,6 @@
 import { Level } from 'level'
 
-const LevelStorage = async ({ path, valueEncoding } = {}, next) => {
+const LevelStorage = async ({ path, valueEncoding } = {}) => {
   path = path || './level'
 
   // console.log("Path:", path)
@@ -8,11 +8,16 @@ const LevelStorage = async ({ path, valueEncoding } = {}, next) => {
   const db = new Level(path, { valueEncoding: valueEncoding || 'view', passive: true })
   await db.open()
 
-  const add = async (hash, data) => {
-    await db.put(hash, data, { valueEncoding })
-    if (next) {
-      return next.add(data)
-    }
+  const put = async (key = null, value) => {
+    return add(null, value)
+  }
+
+  const add = async (hash, value) => {
+    await db.put(hash, value, { valueEncoding })
+  }
+
+  const del = async (hash) => {
+    await db.del(hash)
   }
 
   const get = async (hash) => {
@@ -20,18 +25,9 @@ const LevelStorage = async ({ path, valueEncoding } = {}, next) => {
     if (value !== undefined) {
       return value
     }
-    if (next) {
-      return next.get(hash)
-    }
-  }
-
-  const del = async (hash) => {
-    await db.del(hash)
-    if (next) {
-      return next.add(hash)
-    }
   }
 
+  // TODO: rename to iterator()
   // const values = async () => {
   //   const res = {}
   //   for await (const [key, value] of await db.iterator({ valueEncoding }).all()) {
@@ -40,6 +36,8 @@ const LevelStorage = async ({ path, valueEncoding } = {}, next) => {
   //   return res
   // }
 
+  // TODO: all()
+
   const merge = async (other) => {}
 
   const clear = async () => {
@@ -52,9 +50,11 @@ const LevelStorage = async ({ path, valueEncoding } = {}, next) => {
 
   return {
     add,
-    get,
+    put,
     del,
-    // values,
+    get,
+    // TODO: iterator,
+    // TODO: all,
     merge,
     clear,
     close
diff --git a/src/log.js b/src/log.js
index 10ad5c9..d6d97d2 100644
--- a/src/log.js
+++ b/src/log.js
@@ -5,6 +5,7 @@ import Sorting from './log-sorting.js'
 import IPFSBlockStorage from './ipfs-block-storage.js'
 import MemoryStorage from './memory-storage.js'
 import LRUStorage from './lru-storage.js'
+// import LevelStorage from './level-storage.js'
 import ComposedStorage from './composed-storage.js'
 import { isDefined } from './utils/index.js'
 
@@ -16,6 +17,7 @@ const maxClockTimeReducer = (res, acc) => Math.max(res, acc.clock.time)
 // Default storage for storing the Log and its entries. Default: Memory. Options: Memory, LRU, IPFS.
 const DefaultStorage = MemoryStorage
 // const DefaultStorage = LRUStorage
+// const DefaultStorage = LevelStorage
 // const DefaultStorage = IPFSBlockStorage
 
 // Default AccessController for the Log.
@@ -132,6 +134,11 @@ const Log = async (identity, { logId, logHeads, access, storage, stateStorage, s
    * @return {Promise<Entry>} Entry that was appended
    */
   const append = async (data, options = { pointerCount: 1 }) => {
+    // 1. Prepare entry
+    // 2. Authorize entry
+    // 3. Store entry
+    // 4. return Entry
+
     // Get references (entry at every pow2 of distance)
     const refs = await getReferences(options.pointerCount)
     // Create the next pointers from heads
@@ -252,7 +259,10 @@ const Log = async (identity, { logId, logHeads, access, storage, stateStorage, s
       }
       // Get the next entry from the stack
       entry = stack.pop()
-      if (entry) {
+      // If we have an entry that we haven't traversed yet, process it
+      if (entry && !traversed[entry.hash]) {
+        // Add to the hashes we've traversed
+        traversed[entry.hash] = true
         // Yield the current entry
         yield entry
         // Add hashes of next entries to the stack from entry's
@@ -260,8 +270,6 @@ const Log = async (identity, { logId, logHeads, access, storage, stateStorage, s
         for (const hash of [...entry.next, ...entry.refs]) {
           // Check if we've already traversed this entry
           if (!traversed[hash]) {
-            // Add to the hashes we've traversed
-            traversed[hash] = true
             // Fetch the next entry
             const next = await get(hash)
             if (next) {
@@ -424,6 +432,7 @@ const Log = async (identity, { logId, logHeads, access, storage, stateStorage, s
     clock,
     heads,
     values,
+    all: values, // Alias for values()
     get,
     append,
     join,
diff --git a/src/lru-storage.js b/src/lru-storage.js
index 27502d2..c1ffd50 100644
--- a/src/lru-storage.js
+++ b/src/lru-storage.js
@@ -9,6 +9,10 @@ const LRUStorage = async ({ size } = {}) => {
     lru.set(hash, data)
   }
 
+  const del = async (hash) => {
+    lru.remove(hash)
+  }
+
   const get = async (hash) => {
     if (lru.peek(hash)) {
       return lru.get(hash)
@@ -22,6 +26,8 @@ const LRUStorage = async ({ size } = {}) => {
     }
   }
 
+  // TODO: all()
+
   const merge = async (other) => {
     if (other) {
       for await (const [key, value] of other.iterator()) {
@@ -38,8 +44,10 @@ const LRUStorage = async ({ size } = {}) => {
 
   return {
     put,
+    del,
     get,
     iterator,
+    // TODO: all,
     merge,
     clear,
     close
diff --git a/src/memory-storage.js b/src/memory-storage.js
index d4d0379..7d47b8d 100644
--- a/src/memory-storage.js
+++ b/src/memory-storage.js
@@ -5,6 +5,10 @@ const MemoryStorage = async () => {
     memory[hash] = data
   }
 
+  const del = async (hash) => {
+    delete memory[hash]
+  }
+
   const get = async (hash) => {
     if (memory[hash]) {
       return memory[hash]
@@ -25,14 +29,18 @@ const MemoryStorage = async () => {
     }
   }
 
+  // TODO: all()
+
   const clear = async () => (memory = {})
 
   const close = async () => {}
 
   return {
     put,
+    del,
     get,
     iterator,
+    // TODO: all,
     merge,
     clear,
     close
diff --git a/test/events.spec.js b/test/events.spec.js
index bdff899..32c1151 100644
--- a/test/events.spec.js
+++ b/test/events.spec.js
@@ -10,6 +10,7 @@ import Database from '../src/database.js'
 // Test utils
 import { config, testAPIs, startIpfs, stopIpfs, getIpfsPeerId, waitForPeers } from 'orbit-db-test-utils'
 import connectPeers from './utils/connect-nodes.js'
+import waitFor from './utils/wait-for.js'
 import { identityKeys, signingKeys } from './fixtures/orbit-db-identity-keys.js'
 
 const { sync: rmrf } = rimraf
@@ -29,6 +30,9 @@ Object.keys(testAPIs).forEach((IPFS) => {
     const databaseId = 'events-AAA'
 
     before(async () => {
+      rmrf('./keys_1')
+      rmrf('./keys_2')
+
       // Start two IPFS instances
       ipfsd1 = await startIpfs(IPFS, config.daemon1)
       ipfsd2 = await startIpfs(IPFS, config.daemon2)
@@ -56,6 +60,9 @@ Object.keys(testAPIs).forEach((IPFS) => {
       // Create an identity for each peers
       testIdentity1 = await createIdentity({ id: 'userA', keystore, signingKeystore })
       testIdentity2 = await createIdentity({ id: 'userB', keystore, signingKeystore })
+
+      rmrf(testIdentity1.id)
+      rmrf(testIdentity2.id)
     })
 
     afterEach(async () => {
@@ -96,29 +103,30 @@ Object.keys(testAPIs).forEach((IPFS) => {
     describe('using database', () => {
       it('returns all entries in the database', async () => {
         let updateCount = 0
-        let syncCount = 0
+        // let syncCount = 0
 
         const accessController = {
           canAppend: (entry) => entry.identity.id === testIdentity1.id
         }
 
         const onUpdate = (entry) => {
-          updateCount++
-        }
-        const onSync = (entry) => {
-          syncCount++
+          // console.log(".", updateCount, entry.payload)
+          ++updateCount
         }
+        // const onSync = (entry) => {
+        //   ++syncCount
+        // }
         const onError = () => {
         }
 
         kv1 = await EventStore({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         kv2 = await EventStore({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
-        kv1.events.on('update', onUpdate)
+        // kv1.events.on('update', onUpdate)
         kv2.events.on('update', onUpdate)
-        kv1.events.on('sync', onSync)
-        kv2.events.on('sync', onSync)
-        kv1.events.on('error', onError)
+        // kv1.events.on('sync', onSync)
+        // kv2.events.on('sync', onSync)
+        // kv1.events.on('error', onError)
         kv2.events.on('error', onError)
 
         strictEqual(kv1.type, 'events')
@@ -139,40 +147,18 @@ Object.keys(testAPIs).forEach((IPFS) => {
         await kv1.add('')
         await kv1.add('friend33')
         // const hash = await kv1.add('friend33')
-        // await kv1.set('init', true)
-        // await kv1.set('hello', 'friend')
-        // await kv1.del('hello')
-        // await kv1.set('hello', 'friend2')
-        // await kv1.del('hello')
-        // await kv1.set('empty', '')
-        // await kv1.del('empty')
-        // const hash = await kv1.set('hello', 'friend3')
         // const lastEntry = await kv1.get(hash)
 
-        // const sleep = (time) => new Promise((resolve) => {
-        //   setTimeout(() => {
-        //     resolve()
-        //   }, time)
-        // })
-        // await sleep(5000) // give some time for ipfs peers to sync
-
-        const waitForAllUpdates = async () => {
-          return new Promise((resolve) => {
-            const interval = setInterval(() => {
-              if (updateCount >= 8 * 2 || syncCount >= 8) {
-                clearInterval(interval)
-                resolve()
-              }
-            }, 100)
-          })
-        }
-        await waitForAllUpdates()
         // sync() test
         // console.time('sync')
         // await kv2.sync(lastEntry.bytes)
         // console.timeEnd('sync')
 
-        // await sleep(1000) // give some time for ipfs peers to sync
+        await waitFor(() => updateCount, () => 8)
+
+        // onUpdate test
+        strictEqual(updateCount, 8)
+
         // // write access test
         // let errorMessage
         // try {
@@ -219,16 +205,13 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // onError test
         // notStrictEqual(error, undefined)
         // strictEqual(error.message, 'CBOR decode error: too many terminals, data makes no sense')
-
-        // onUpdate test
-        strictEqual(updateCount, 8 * 2)
       })
     })
 
-    describe.skip('load database', () => {
+    describe('load database', () => {
       it('returns all entries in the database', async () => {
         let updateCount = 0
-        let syncCount = 0
+        // let syncCount = 0
 
         const accessController = {
           canAppend: (entry) => entry.identity.id === testIdentity1.id
@@ -237,17 +220,17 @@ Object.keys(testAPIs).forEach((IPFS) => {
         const onUpdate = (entry) => {
           ++updateCount
         }
-        const onSync = (entry) => {
-          ++syncCount
-        }
+        // const onSync = (entry) => {
+        //   ++syncCount
+        // }
 
         kv1 = await EventStore({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         kv2 = await EventStore({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
-        kv1.events.on('update', onUpdate)
+        // kv1.events.on('update', onUpdate)
         kv2.events.on('update', onUpdate)
-        kv1.events.on('sync', onSync)
-        kv2.events.on('sync', onSync)
+        // kv1.events.on('sync', onSync)
+        // kv2.events.on('sync', onSync)
 
         await waitForPeers(ipfs1, [peerId2], databaseId)
         await waitForPeers(ipfs2, [peerId1], databaseId)
@@ -263,34 +246,21 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // const hash = await kv1.add('friend33')
         // const lastEntry = await kv1.log.get(hash)
 
-        // const sleep = (time) => new Promise((resolve) => {
-        //   setTimeout(() => {
-        //     resolve()
-        //   }, time)
-        // })
-        // await sleep(10000) // give some time for ipfs peers to sync
-        const waitForAllUpdates = async () => {
-          return new Promise((resolve) => {
-            const interval = setInterval(() => {
-              if (updateCount >= 8 * 2 || syncCount >= 8) {
-                clearInterval(interval)
-                resolve()
-              }
-            }, 100)
-          })
-        }
-        await waitForAllUpdates()
-
         // sync() test
         // console.time('sync')
         // await kv2.sync(lastEntry.bytes)
         // console.timeEnd('sync')
 
-        // await kv1.close()
-        // await kv2.close()
+        await waitFor(() => updateCount, () => 8)
 
-        // kv1 = await EventStore({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
-        // kv2 = await EventStore({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
+        // onUpdate test
+        strictEqual(updateCount, 8)
+
+        await kv1.close()
+        await kv2.close()
+
+        kv1 = await EventStore({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
+        kv2 = await EventStore({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
         // all() test
         const all2 = []
diff --git a/test/feed.spec.js b/test/feed.spec.js
index 9d26a7d..4b7ab20 100644
--- a/test/feed.spec.js
+++ b/test/feed.spec.js
@@ -10,6 +10,7 @@ import Database from '../src/database.js'
 // Test utils
 import { config, testAPIs, getIpfsPeerId, waitForPeers, startIpfs, stopIpfs } from 'orbit-db-test-utils'
 import connectPeers from './utils/connect-nodes.js'
+import waitFor from './utils/wait-for.js'
 import { identityKeys, signingKeys } from './fixtures/orbit-db-identity-keys.js'
 
 const { sync: rmrf } = rimraf
@@ -56,6 +57,9 @@ Object.keys(testAPIs).forEach((IPFS) => {
       // Create an identity for each peers
       testIdentity1 = await createIdentity({ id: 'userA', keystore, signingKeystore })
       testIdentity2 = await createIdentity({ id: 'userB', keystore, signingKeystore })
+
+      rmrf(testIdentity1.id)
+      rmrf(testIdentity2.id)
     })
 
     afterEach(async () => {
@@ -96,7 +100,7 @@ Object.keys(testAPIs).forEach((IPFS) => {
     describe('using database', () => {
       it('returns all entries in the database', async () => {
         let updateCount = 0
-        let syncCount = 0
+        // let syncCount = 0
 
         const accessController = {
           canAppend: (entry) => entry.identity.id === testIdentity1.id
@@ -105,19 +109,19 @@ Object.keys(testAPIs).forEach((IPFS) => {
         const onUpdate = (entry) => {
           ++updateCount
         }
-        const onSync = (entry) => {
-          ++syncCount
-        }
+        // const onSync = (entry) => {
+        //   ++syncCount
+        // }
         const onError = () => {
         }
 
         kv1 = await Feed({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         kv2 = await Feed({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
-        kv1.events.on('update', onUpdate)
+        // kv1.events.on('update', onUpdate)
         kv2.events.on('update', onUpdate)
-        kv1.events.on('sync', onSync)
-        kv2.events.on('sync', onSync)
+        // kv1.events.on('sync', onSync)
+        // kv2.events.on('sync', onSync)
         kv1.events.on('error', onError)
         kv2.events.on('error', onError)
 
@@ -141,30 +145,16 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // const hash = await kv1.add('friend33')
         // const lastEntry = await kv1.get(hash)
 
-        // const sleep = (time) => new Promise((resolve) => {
-        //   setTimeout(() => {
-        //     resolve()
-        //   }, time)
-        // })
-        // await sleep(10000) // give some time for ipfs peers to sync
-        const waitForAllUpdates = async () => {
-          return new Promise((resolve) => {
-            const interval = setInterval(() => {
-              if (updateCount >= 8 * 2 || syncCount >= 8) {
-                clearInterval(interval)
-                resolve()
-              }
-            }, 100)
-          })
-        }
-        await waitForAllUpdates()
-
         // // sync() test
         // console.time('sync')
         // await kv2.sync(lastEntry.bytes)
         // console.timeEnd('sync')
 
-        // await sleep(1000) // give some time for ipfs peers to sync
+        await waitFor(() => updateCount, () => 8)
+
+        // onUpdate test
+        strictEqual(updateCount, 8)
+
         // // write access test
         // let errorMessage
         // try {
@@ -211,16 +201,13 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // onError test
         // notStrictEqual(error, undefined)
         // strictEqual(error.message, 'CBOR decode error: too many terminals, data makes no sense')
-
-        // onUpdate test
-        strictEqual(updateCount, 8 * 2)
       })
     })
 
-    describe.skip('load database', () => {
+    describe('load database', () => {
       it('returns all entries in the database', async () => {
         let updateCount = 0
-        let syncCount = 0
+        // let syncCount = 0
 
         const accessController = {
           canAppend: (entry) => entry.identity.id === testIdentity1.id
@@ -229,19 +216,19 @@ Object.keys(testAPIs).forEach((IPFS) => {
         const onUpdate = (entry) => {
           ++updateCount
         }
-        const onSync = (entry) => {
-          ++syncCount
-        }
+        // const onSync = (entry) => {
+        //   ++syncCount
+        // }
         const onError = () => {
         }
 
         kv1 = await Feed({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         kv2 = await Feed({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
-        kv1.events.on('update', onUpdate)
+        // kv1.events.on('update', onUpdate)
         kv2.events.on('update', onUpdate)
-        kv1.events.on('sync', onSync)
-        kv2.events.on('sync', onSync)
+        // kv1.events.on('sync', onSync)
+        // kv2.events.on('sync', onSync)
         kv1.events.on('error', onError)
         kv2.events.on('error', onError)
 
@@ -262,36 +249,23 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // const hashX = await kv1.del(hash)
         // const lastEntry = await kv1.log.get(hashX)
 
-        // const sleep = (time) => new Promise((resolve) => {
-        //   setTimeout(() => {
-        //     resolve()
-        //   }, time)
-        // })
-        // await sleep(10000) // give some time for ipfs peers to sync
-        const waitForAllUpdates = async () => {
-          return new Promise((resolve) => {
-            const interval = setInterval(() => {
-              if (updateCount >= 8 * 2 || syncCount >= 8) {
-                clearInterval(interval)
-                resolve()
-              }
-            }, 100)
-          })
-        }
-        await waitForAllUpdates()
-
         // sync() test
         // console.time('sync')
         // await kv2.sync(lastEntry.bytes)
         // console.timeEnd('sync')
 
-        // await kv1.close()
-        // await kv2.close()
+        await waitFor(() => updateCount, () => 11)
+
+        // onUpdate test
+        strictEqual(updateCount, 11)
+
+        await kv1.close()
+        await kv2.close()
 
         // // await sleep(1000) // give some time for ipfs peers to sync
 
-        // kv1 = await Feed({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
-        // kv2 = await Feed({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
+        kv1 = await Feed({ OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
+        kv2 = await Feed({ OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
         // all() test
         const all2 = []
diff --git a/test/kv.spec.js b/test/kv.spec.js
index 65cf408..491829b 100644
--- a/test/kv.spec.js
+++ b/test/kv.spec.js
@@ -11,6 +11,7 @@ import Database from '../src/database.js'
 // Test utils
 import { config, testAPIs, getIpfsPeerId, waitForPeers, startIpfs, stopIpfs } from 'orbit-db-test-utils'
 import connectPeers from './utils/connect-nodes.js'
+import waitFor from './utils/wait-for.js'
 import { identityKeys, signingKeys } from './fixtures/orbit-db-identity-keys.js'
 
 const { sync: rmrf } = rimraf
@@ -57,6 +58,9 @@ Object.keys(testAPIs).forEach((IPFS) => {
       // Create an identity for each peers
       testIdentity1 = await createIdentity({ id: 'userA', keystore, signingKeystore })
       testIdentity2 = await createIdentity({ id: 'userB', keystore, signingKeystore })
+
+      rmrf(testIdentity1.id)
+      rmrf(testIdentity2.id)
     })
 
     after(async () => {
@@ -98,18 +102,18 @@ Object.keys(testAPIs).forEach((IPFS) => {
       it('returns all entries in the database', async () => {
         // let error
         let updateCount = 0
-        let syncCount = 0
+        // const syncCount = 0
 
         const accessController = {
           canAppend: (entry) => entry.identity.id === testIdentity1.id
         }
 
         const onUpdate = (entry) => {
-          updateCount++
-        }
-        const onSync = (entry) => {
-          syncCount++
+          ++updateCount
         }
+        // const onSync = (entry) => {
+        //   ++syncCount
+        // }
         const onError = () => {
           // error = err
         }
@@ -119,10 +123,10 @@ Object.keys(testAPIs).forEach((IPFS) => {
         kv1 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         kv2 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
-        kv1.events.on('update', onUpdate)
+        // kv1.events.on('update', onUpdate)
         kv2.events.on('update', onUpdate)
-        kv1.events.on('sync', onSync)
-        kv2.events.on('sync', onSync)
+        // kv1.events.on('sync', onSync)
+        // kv2.events.on('sync', onSync)
         kv1.events.on('error', onError)
         kv2.events.on('error', onError)
 
@@ -146,29 +150,18 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // const hash = await kv1.set('hello', 'friend3')
         // const lastEntry = await kv1.database.log.get(hash)
 
-        // const sleep = (time) => new Promise((resolve) => {
-        //   setTimeout(() => {
-        //     resolve()
-        //   }, time)
-        // })
-        // await sleep(10000) // give some time for ipfs peers to sync
-        const waitForAllUpdates = async () => {
-          return new Promise((resolve) => {
-            const interval = setInterval(() => {
-              if (updateCount >= 8 * 2 || syncCount >= 8) {
-                clearInterval(interval)
-                resolve()
-              }
-            }, 100)
-          })
-        }
-        await waitForAllUpdates()
-
         // sync() test
         // console.time('sync')
         // await kv2.sync(lastEntry.bytes)
         // console.timeEnd('sync')
 
+        await waitFor(() => updateCount, () => 8)
+
+        // update event test
+        strictEqual(updateCount, 8)
+        // sync event test
+        // strictEqual(syncCount, 8)
+
         // write access test
         // let errorMessage
         // try {
@@ -229,39 +222,34 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // onError test
         // notStrictEqual(error, undefined)
         // strictEqual(error.message, 'CBOR decode error: too many terminals, data makes no sense')
-
-        // update event test
-        strictEqual(updateCount, 8 * 2)
-        // sync event test
-        strictEqual(syncCount, 8)
       })
     })
 
-    describe.skip('load database', () => {
+    describe('load database', () => {
       it('returns all entries in the database', async () => {
         let updateCount = 0
-        let syncCount = 0
+        // let syncCount = 0
 
         const accessController = {
           canAppend: (entry) => entry.identity.id === testIdentity1.id
         }
 
         const onUpdate = (entry) => {
-          updateCount++
-        }
-        const onSync = (entry) => {
-          syncCount++
+          ++updateCount
         }
+        // const onSync = (entry) => {
+        //   ++syncCount
+        // }
 
         // kv1 = await KeyValueStore({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         // kv2 = await KeyValueStore({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
         kv1 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         kv2 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
-        kv1.events.on('update', onUpdate)
+        // kv1.events.on('update', onUpdate)
         kv2.events.on('update', onUpdate)
-        kv1.events.on('sync', onSync)
-        kv2.events.on('sync', onSync)
+        // kv1.events.on('sync', onSync)
+        // kv2.events.on('sync', onSync)
 
         await waitForPeers(ipfs1, [peerId2], databaseId)
         await waitForPeers(ipfs2, [peerId1], databaseId)
@@ -277,36 +265,21 @@ Object.keys(testAPIs).forEach((IPFS) => {
         // const hash = await kv1.set('hello', 'friend3')
         // const lastEntry = await kv1.log.get(hash)
 
-        // const sleep = (time) => new Promise((resolve) => {
-        //   setTimeout(() => {
-        //     resolve()
-        //   }, time)
-        // })
-        // await sleep(10000) // give some time for ipfs peers to sync
-        const waitForAllUpdates = async () => {
-          return new Promise((resolve) => {
-            const interval = setInterval(() => {
-              if (updateCount >= 8 * 2 || syncCount >= 8) {
-                clearInterval(interval)
-                resolve()
-              }
-            }, 100)
-          })
-        }
-        await waitForAllUpdates()
-
         // sync() test
         // console.time('sync')
         // await kv2.sync(lastEntry.bytes)
         // console.timeEnd('sync')
 
-        // await kv1.close()
-        // await kv2.close()
+        await waitFor(() => updateCount, () => 8)
+        strictEqual(updateCount, 8)
+
+        await kv1.close()
+        await kv2.close()
 
         // kv1 = await KeyValueStore({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
         // kv2 = await KeyValueStore({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
-        // kv1 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
-        // kv2 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
+        kv1 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs1, identity: testIdentity1, databaseId, accessController })
+        kv2 = await KeyValueStorePersisted({ KeyValue: KeyValueStore, OpLog: Log, Database, ipfs: ipfs2, identity: testIdentity2, databaseId, accessController })
 
         console.time('get')
         const value0 = await kv2.get('init')
@@ -349,8 +322,6 @@ Object.keys(testAPIs).forEach((IPFS) => {
           { key: 'hello', value: 'friend3' },
           { key: 'init', value: true }
         ])
-
-        strictEqual(syncCount, 8)
       })
     })
   })
diff --git a/test/log-references.spec.js b/test/log-references.spec.js
index c12af9b..c0ea710 100644
--- a/test/log-references.spec.js
+++ b/test/log-references.spec.js
@@ -1,7 +1,7 @@
 import { strictEqual } from 'assert'
 import rimraf from 'rimraf'
 import { copy } from 'fs-extra'
-import { Log } from '../src/log.js'
+import { Log, MemoryStorage } from '../src/log.js'
 import IdentityProvider from 'orbit-db-identity-provider'
 import Keystore from '../src/Keystore.js'
 
@@ -110,20 +110,26 @@ Object.keys(testAPIs).forEach((IPFS) => {
         { amount: 32, referenceCount: 16, refLength: 4 },
         { amount: 18, referenceCount: 32, refLength: 5 },
         { amount: 128, referenceCount: 32, refLength: 5 },
+        { amount: 63, referenceCount: 64, refLength: 5 },
         { amount: 64, referenceCount: 64, refLength: 6 },
         { amount: 65, referenceCount: 64, refLength: 6 },
+        { amount: 91, referenceCount: 64, refLength: 6 },
         { amount: 128, referenceCount: 64, refLength: 6 },
         { amount: 128, referenceCount: 1, refLength: 0 },
         { amount: 128, referenceCount: 2, refLength: 1 },
         { amount: 256, referenceCount: 1, refLength: 0 },
-        { amount: 256, referenceCount: 256, refLength: 8 },
-        { amount: 256, referenceCount: 1024, refLength: 8 }
+        { amount: 256, referenceCount: 4, refLength: 2 },
+        { amount: 256, referenceCount: 8, refLength: 3 },
+        { amount: 256, referenceCount: 16, refLength: 4 },
+        { amount: 256, referenceCount: 32, refLength: 5 },
+        { amount: 1024, referenceCount: 2, refLength: 1 }
       ]
 
       inputs.forEach(input => {
         it(`has ${input.refLength} references, max distance ${input.referenceCount}, total of ${input.amount} entries`, async () => {
           const test = async (amount, referenceCount, refLength) => {
-            const log1 = await Log(testIdentity, { logId: 'A' })
+            const storage = await MemoryStorage()
+            const log1 = await Log(testIdentity, { logId: 'A', storage })
             for (let i = 0; i < amount; i++) {
               await log1.append((i + 1).toString(), { pointerCount: referenceCount })
             }
@@ -140,19 +146,21 @@ Object.keys(testAPIs).forEach((IPFS) => {
               // Check the first ref (distance 2)
               if (values[idx].refs.length > 0) { strictEqual(values[idx].refs[0], values[idx - 2].hash) }
 
-              // Check the second ref (distance 2)
-
+              // Check the second ref (distance 4)
               if (values[idx].refs.length > 1 && idx > referenceCount) { strictEqual(values[idx].refs[1], values[idx - 4].hash) }
 
-              // Check the third ref (distance 4)
+              // Check the third ref (distance 8)
               if (values[idx].refs.length > 2 && idx > referenceCount) { strictEqual(values[idx].refs[2], values[idx - 8].hash) }
 
-              // Check the fourth ref (distance 8)
+              // Check the fourth ref (distance 16)
               if (values[idx].refs.length > 3 && idx > referenceCount) { strictEqual(values[idx].refs[3], values[idx - 16].hash) }
 
-              // Check the fifth ref (distance 16)
+              // Check the fifth ref (distance 32)
               if (values[idx].refs.length > 4 && idx > referenceCount) { strictEqual(values[idx].refs[4], values[idx - 32].hash) }
 
+              // Check the fifth ref (distance 64)
+              if (values[idx].refs.length > 5 && idx > referenceCount) { strictEqual(values[idx].refs[5], values[idx - 64].hash) }
+
               // Check the reference of each entry
               if (idx > referenceCount) { strictEqual(values[idx].refs.length, refLength) }
             }
diff --git a/test/utils/wait-for.js b/test/utils/wait-for.js
new file mode 100644
index 0000000..b2f34fc
--- /dev/null
+++ b/test/utils/wait-for.js
@@ -0,0 +1,12 @@
+const waitFor = async (valueA, toBeValueB, pollInterval = 100) => {
+  return new Promise((resolve) => {
+    const interval = setInterval(() => {
+      if (valueA() === toBeValueB()) {
+        clearInterval(interval)
+        resolve()
+      }
+    }, pollInterval)
+  })
+}
+
+export default waitFor