feat: migrate to new ipfs-block and block-service api

.gitignore

@@ -35,3 +35,4 @@ node_modules
 .node_repl_history
 
 dist
+test/example-repo/datastore/LOG*

package.json

@@ -32,14 +32,11 @@
   "homepage": "https://github.com/ipld/js-ipld-resolver#readme",
   "license": "MIT",
   "devDependencies": {
-    "aegir": "^11.0.0",
-    "buffer-loader": "0.0.1",
+    "aegir": "^11.0.1",
     "chai": "^3.5.0",
     "dirty-chai": "^1.2.2",
     "eth-hash-to-cid": "^0.1.0",
     "ethereumjs-block": "^1.5.0",
-    "fs-pull-blob-store": "~0.4.1",
-    "idb-pull-blob-store": "~0.5.1",
     "lodash": "^4.17.4",
     "ncp": "^2.0.0",
     "pre-commit": "^1.2.2",
@@ -49,20 +46,21 @@
   "dependencies": {
     "async": "^2.1.5",
     "cids": "~0.4.2",
-    "interface-pull-blob-store": "~0.6.0",
-    "ipfs-block": "~0.5.5",
-    "ipfs-block-service": "~0.8.3",
-    "ipfs-repo": "~0.11.3",
-    "ipld-dag-cbor": "~0.10.1",
-    "ipld-dag-pb": "~0.10.1",
-    "ipld-eth-block": "^2.2.1",
-    "ipld-eth-block-list": "^1.0.3",
-    "ipld-eth-state-trie": "^1.0.2",
-    "ipld-eth-storage-trie": "^1.0.0",
-    "ipld-eth-tx-trie": "^1.0.0",
+    "interface-datastore": "^0.1.1",
+    "ipfs-block": "~0.6.0",
+    "ipfs-block-service": "~0.9.0",
+    "ipfs-repo": "~0.12.0",
+    "ipld-dag-cbor": "~0.11.0",
+    "ipld-dag-pb": "~0.11.0",
+    "ipld-eth-block": "^2.2.2",
+    "ipld-eth-block-list": "^1.0.4",
+    "ipld-eth-state-trie": "^1.0.4",
+    "ipld-eth-storage-trie": "^1.0.1",
+    "ipld-eth-tx-trie": "^1.0.1",
     "is-ipfs": "~0.3.0",
     "lodash.flatten": "^4.4.0",
     "lodash.includes": "^4.3.0",
+    "memdown": "^1.2.4",
     "multihashes": "~0.4.4",
     "pull-sort": "^1.0.0",
     "pull-stream": "^3.5.0",

src/index.js

@@ -5,13 +5,14 @@ const pull = require('pull-stream')
 const CID = require('cids')
 const doUntil = require('async/doUntil')
 const IPFSRepo = require('ipfs-repo')
-const MemoryStore = require('interface-pull-blob-store')
 const BlockService = require('ipfs-block-service')
 const joinPath = require('path').join
 const pullDeferSource = require('pull-defer').source
 const pullTraverse = require('pull-traverse')
 const map = require('async/map')
+const series = require('async/series')
 const waterfall = require('async/waterfall')
+const MemoryStore = require('interface-datastore').MemoryDatastore
 
 const dagPB = require('ipld-dag-pb')
 const dagCBOR = require('ipld-dag-cbor')
@@ -25,10 +26,8 @@ function noop () {}
 
 class IPLDResolver {
   constructor (blockService) {
-    // nicola will love this!
     if (!blockService) {
-      const repo = new IPFSRepo('in-memory', { stores: MemoryStore })
-      blockService = new BlockService(repo)
+      throw new Error('Missing blockservice')
     }
 
     this.bs = blockService
@@ -182,50 +181,24 @@ class IPLDResolver {
     if (typeof options === 'function') {
       return setImmediate(() => callback(new Error('no options were passed')))
     }
-
-    let nodeAndCID
+    callback = callback || noop
 
     if (options.cid && CID.isCID(options.cid)) {
-      nodeAndCID = {
-        node: node,
-        cid: options.cid
-      }
-
-      store.apply(this)
-    } else {
-      options.hashAlg = options.hashAlg || 'sha2-256'
-
-      const r = this.resolvers[options.format]
-      // TODO add support for different hash funcs in the utils of
-      // each format (just really needed for CBOR for now, really
-      // r.util.cid(node1, hashAlg, (err, cid) => {
-      r.util.cid(node, (err, cid) => {
-        if (err) {
-          return callback(err)
-        }
-
-        nodeAndCID = {
-          node: node,
-          cid: cid
-        }
-
-        store.apply(this)
-      })
+      return this._put(options.cid, node, callback)
     }
 
-    function store () {
-      callback = callback || noop
+    options.hashAlg = options.hashAlg || 'sha2-256'
+    const r = this.resolvers[options.format]
+    // TODO add support for different hash funcs in the utils of
+    // each format (just really needed for CBOR for now, really
+    // r.util.cid(node1, hashAlg, (err, cid) => {
+    r.util.cid(node, (err, cid) => {
+      if (err) {
+        return callback(err)
+      }
 
-      pull(
-        pull.values([nodeAndCID]),
-        this._putStream((err) => {
-          if (err) {
-            return callback(err)
-          }
-          callback(null, nodeAndCID.cid)
-        })
-      )
-    }
+      this._put(cid, node, callback)
+    })
   }
 
   treeStream (cid, path, options) {
@@ -340,22 +313,11 @@ class IPLDResolver {
   /*           */
 
   _get (cid, callback) {
-    pull(
-      this._getStream(cid),
-      pull.collect((err, res) => {
-        if (err) {
-          return callback(err)
-        }
-        callback(null, res[0])
-      })
-    )
-  }
+    const r = this.resolvers[cid.codec]
 
-  _getStream (cid) {
-    return pull(
-      this.bs.getStream(cid),
-      pull.asyncMap((block, cb) => {
-        const r = this.resolvers[cid.codec]
+    waterfall([
+      (cb) => this.bs.get(cid, cb),
+      (block, cb) => {
         if (r) {
           r.util.deserialize(block.data, (err, deserialized) => {
             if (err) {
@@ -366,32 +328,50 @@ class IPLDResolver {
         } else { // multicodec unknown, send back raw data
           cb(null, block.data)
         }
-      })
-    )
+      }
+    ], callback)
   }
 
-  _putStream (callback) {
+  _put (cid, node, callback) {
     callback = callback || noop
 
-    return pull(
-      pull.asyncMap((nodeAndCID, cb) => {
-        const cid = nodeAndCID.cid
-        const r = this.resolvers[cid.codec]
-
-        r.util.serialize(nodeAndCID.node, (err, serialized) => {
-          if (err) {
-            return cb(err)
-          }
-          cb(null, {
-            block: new Block(serialized),
-            cid: cid
-          })
-        })
-      }),
-      this.bs.putStream(),
-      pull.onEnd(callback)
-    )
+    const r = this.resolvers[cid.codec]
+    waterfall([
+      (cb) => r.util.serialize(node, cb),
+      (buf, cb) => this.bs.put(new Block(buf, cid), cb)
+    ], (err) => {
+      if (err) {
+        return callback(err)
+      }
+      callback(null, cid)
+    })
   }
 }
 
+/**
+ * Create an IPLD resolver with an inmemory blockservice and
+ * repo.
+ *
+ * @param {function(Error, IPLDResolver)} callback
+ * @returns {void}
+ */
+IPLDResolver.inMemory = function (callback) {
+  const repo = new IPFSRepo('in-memory', {
+    fs: MemoryStore,
+    level: require('memdown'),
+    lock: 'memory'
+  })
+  const blockService = new BlockService(repo)
+
+  series([
+    (cb) => repo.init({}, cb),
+    (cb) => repo.open(cb)
+  ], (err) => {
+    if (err) {
+      return callback(err)
+    }
+    callback(null, new IPLDResolver(blockService))
+  })
+}
+
 module.exports = IPLDResolver

test/basics.js

@@ -18,8 +18,10 @@ module.exports = (repo) => {
     })
 
     it('creates an in memory repo if no blockService is passed', () => {
-      const r = new IPLDResolver()
-      expect(r.bs).to.exist()
+      IPLDResolver.inMemory((err, r) => {
+        expect(err).to.not.exist()
+        expect(r.bs).to.exist()
+      })
     })
 
     it.skip('add support to a new format', () => {})

test/browser.js

@@ -3,12 +3,8 @@
 
 'use strict'
 
-const eachSeries = require('async/eachSeries')
-const Store = require('idb-pull-blob-store')
-const _ = require('lodash')
+const series = require('async/series')
 const IPFSRepo = require('ipfs-repo')
-const pull = require('pull-stream')
-const repoContext = require.context('buffer!./example-repo', true)
 
 const basePath = 'ipfs' + Math.random()
 
@@ -21,35 +17,24 @@ idb.deleteDatabase(basePath)
 idb.deleteDatabase(basePath + '/blocks')
 
 describe('Browser', () => {
-  before((done) => {
-    const repoData = []
-    repoContext.keys().forEach((key) => {
-      repoData.push({
-        key: key.replace('./', ''),
-        value: repoContext(key)
-      })
-    })
-
-    const mainBlob = new Store(basePath)
-    const blocksBlob = new Store(basePath + '/blocks')
-
-    eachSeries(repoData, (file, cb) => {
-      if (_.startsWith(file.key, 'datastore/')) {
-        return cb()
-      }
-
-      const blocks = _.startsWith(file.key, 'blocks/')
-      const blob = blocks ? blocksBlob : mainBlob
-      const key = blocks ? file.key.replace(/^blocks\//, '') : file.key
+  const repo = new IPFSRepo(basePath)
 
-      pull(
-        pull.values([file.value]),
-        blob.write(key, cb)
-      )
-    }, done)
+  before((done) => {
+    series([
+      (cb) => repo.init({}, cb),
+      (cb) => repo.open(cb)
+    ], done)
   })
 
-  const repo = new IPFSRepo(basePath, { stores: Store })
+  after((done) => {
+    series([
+      (cb) => repo.close(cb),
+      (cb) => {
+        idb.deleteDatabase(basePath)
+        idb.deleteDatabase(basePath + '/blocks')
+      }
+    ], done)
+  })
 
   require('./basics')(repo)
   require('./ipld-dag-pb')(repo)

test/example-repo/blocks/SHARDING

@@ -0,0 +1 @@
+/repo/flatfs/shard/v1/next-to-last/2

test/example-repo/blocks/_README

@@ -0,0 +1,30 @@
+This is a repository of IPLD objects. Each IPLD object is in a single file,
+named <base32 encoding of cid>.data. Where <base32 encoding of cid> is the
+"base32" encoding of the CID (as specified in
+https://github.com/multiformats/multibase) without the 'B' prefix.
+All the object files are placed in a tree of directories, based on a
+function of the CID. This is a form of sharding similar to
+the objects directory in git repositories. Previously, we used
+prefixes, we now use the next-to-last two charters.
+
+    func NextToLast(base32cid string) {
+      nextToLastLen := 2
+      offset := len(base32cid) - nextToLastLen - 1
+      return str[offset : offset+nextToLastLen]
+    }
+
+For example, an object with a base58 CIDv1 of
+
+    zb2rhYSxw4ZjuzgCnWSt19Q94ERaeFhu9uSqRgjSdx9bsgM6f
+
+has a base32 CIDv1 of
+
+    BAFKREIA22FLID5AJ2KU7URG47MDLROZIH6YF2KALU2PWEFPVI37YLKRSCA
+
+and will be placed at
+
+    SC/AFKREIA22FLID5AJ2KU7URG47MDLROZIH6YF2KALU2PWEFPVI37YLKRSCA.data
+
+with 'SC' being the last-to-next two characters and the 'B' at the
+beginning of the CIDv1 string is the multibase prefix that is not
+stored in the filename.

test/example-repo/datastore/CURRENT

@@ -1 +1 @@
-MANIFEST-000007
+MANIFEST-000009

test/example-repo/version

@@ -1 +1 @@
-3
+5