diff --git a/packages/lib/src/index.js b/packages/lib/src/index.js
index c78a404f4..2d0e2f874 100644
--- a/packages/lib/src/index.js
+++ b/packages/lib/src/index.js
@@ -23,6 +23,7 @@ import { compareStorageLayouts } from './validations/Layout';
 import { behaviors, helpers } from './test'
 const assertions = helpers.assertions
 const assertRevert = helpers.assertRevert
+const assertEvent = helpers.assertEvent
 
 // model objects
 import Proxy from './proxy/Proxy'
@@ -39,6 +40,7 @@ export {
   decodeLogs,
   encodeCall,
   assertRevert,
+  assertEvent,
   assertions,
   behaviors,
   sendTransaction,
diff --git a/packages/lib/src/test/helpers/assertEvent.js b/packages/lib/src/test/helpers/assertEvent.js
new file mode 100644
index 000000000..86aca3c9a
--- /dev/null
+++ b/packages/lib/src/test/helpers/assertEvent.js
@@ -0,0 +1,18 @@
+function inLogs (logs, eventName, eventArgs = {}) {
+  const event = logs.find(e =>
+    e.event === eventName &&
+    Object.entries(eventArgs).every(([k, v]) => e.args[k] === v))
+
+  assert(!!event, `Expected to find ${eventName} with ${eventArgs} in ${logs}`)
+  return event
+}
+
+async function inTransaction (tx, eventName, eventArgs = {}) {
+  const { logs } = await tx;
+  return inLogs(logs, eventName, eventArgs);
+}
+
+export default {
+  inLogs,
+  inTransaction,
+}
diff --git a/packages/lib/src/test/index.js b/packages/lib/src/test/index.js
index 885340fb4..2d568d3de 100644
--- a/packages/lib/src/test/index.js
+++ b/packages/lib/src/test/index.js
@@ -1,10 +1,12 @@
 import assertions from './helpers/assertions'
+import assertEvent from './helpers/assertEvent'
 import assertRevert from './helpers/assertRevert'
 import shouldBehaveLikeOwnable from './behaviors/Ownable'
 
 const helpers = {
   assertions,
   assertRevert,
+  assertEvent,
 }
 
 const behaviors = {
diff --git a/packages/vouching/.babelrc b/packages/vouching/.babelrc
new file mode 100644
index 000000000..1cbd8ddcd
--- /dev/null
+++ b/packages/vouching/.babelrc
@@ -0,0 +1,10 @@
+{
+  "presets": [
+    ["env", {
+      "targets": {
+        "node": "8.9"
+      }
+    }]
+  ],
+  "plugins": ["transform-object-rest-spread"]
+}
diff --git a/packages/vouching/package-lock.json b/packages/vouching/package-lock.json
index 361ea40f5..c03a5c040 100644
--- a/packages/vouching/package-lock.json
+++ b/packages/vouching/package-lock.json
@@ -11,13 +11,15 @@
 		},
 		"TPL-1.0-audit": {
 			"version": "git+https://github.com/TPL-protocol/tpl-contracts.git#fa6b46bfce719c8301f795846eca5a3fdbcf436c",
+			"from": "TPL-1.0-audit@git+https://github.com/TPL-protocol/tpl-contracts.git#fa6b46bfce719c8301f795846eca5a3fdbcf436c",
 			"requires": {
 				"openzeppelin-zos": "git+https://github.com/openzeppelin/openzeppelin-zos.git#aa6a44bb20cb7bb5d810f0e854320c001e053970",
-				"web3": "1.0.0-beta.36"
+				"web3": "^1.0.0-beta.35"
 			},
 			"dependencies": {
 				"openzeppelin-zos": {
-					"version": "git+https://github.com/openzeppelin/openzeppelin-zos.git#aa6a44bb20cb7bb5d810f0e854320c001e053970"
+					"version": "git+https://github.com/openzeppelin/openzeppelin-zos.git#aa6a44bb20cb7bb5d810f0e854320c001e053970",
+					"from": "openzeppelin-zos@git+https://github.com/openzeppelin/openzeppelin-zos.git#aa6a44bb20cb7bb5d810f0e854320c001e053970"
 				}
 			}
 		},
@@ -26,7 +28,7 @@
 			"resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
 			"integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
 			"requires": {
-				"mime-types": "2.1.20",
+				"mime-types": "~2.1.18",
 				"negotiator": "0.6.1"
 			}
 		},
@@ -40,12 +42,24 @@
 			"resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
 			"integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
 			"requires": {
-				"co": "4.6.0",
-				"fast-deep-equal": "1.1.0",
-				"fast-json-stable-stringify": "2.0.0",
-				"json-schema-traverse": "0.3.1"
+				"co": "^4.6.0",
+				"fast-deep-equal": "^1.0.0",
+				"fast-json-stable-stringify": "^2.0.0",
+				"json-schema-traverse": "^0.3.0"
 			}
 		},
+		"ansi-regex": {
+			"version": "2.1.1",
+			"resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+			"integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+			"dev": true
+		},
+		"ansi-styles": {
+			"version": "2.2.1",
+			"resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+			"integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+			"dev": true
+		},
 		"any-promise": {
 			"version": "1.3.0",
 			"resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
@@ -61,7 +75,7 @@
 			"resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
 			"integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
 			"requires": {
-				"safer-buffer": "2.1.2"
+				"safer-buffer": "~2.1.0"
 			}
 		},
 		"asn1.js": {
@@ -69,9 +83,9 @@
 			"resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
 			"integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
 			"requires": {
-				"bn.js": "4.11.8",
-				"inherits": "2.0.3",
-				"minimalistic-assert": "1.0.1"
+				"bn.js": "^4.0.0",
+				"inherits": "^2.0.1",
+				"minimalistic-assert": "^1.0.0"
 			}
 		},
 		"assert-plus": {
@@ -105,6 +119,802 @@
 			"resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
 			"integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
 		},
+		"babel-code-frame": {
+			"version": "6.26.0",
+			"resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
+			"integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
+			"dev": true,
+			"requires": {
+				"chalk": "^1.1.3",
+				"esutils": "^2.0.2",
+				"js-tokens": "^3.0.2"
+			}
+		},
+		"babel-core": {
+			"version": "6.26.3",
+			"resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.3.tgz",
+			"integrity": "sha512-6jyFLuDmeidKmUEb3NM+/yawG0M2bDZ9Z1qbZP59cyHLz8kYGKYwpJP0UwUKKUiTRNvxfLesJnTedqczP7cTDA==",
+			"dev": true,
+			"requires": {
+				"babel-code-frame": "^6.26.0",
+				"babel-generator": "^6.26.0",
+				"babel-helpers": "^6.24.1",
+				"babel-messages": "^6.23.0",
+				"babel-register": "^6.26.0",
+				"babel-runtime": "^6.26.0",
+				"babel-template": "^6.26.0",
+				"babel-traverse": "^6.26.0",
+				"babel-types": "^6.26.0",
+				"babylon": "^6.18.0",
+				"convert-source-map": "^1.5.1",
+				"debug": "^2.6.9",
+				"json5": "^0.5.1",
+				"lodash": "^4.17.4",
+				"minimatch": "^3.0.4",
+				"path-is-absolute": "^1.0.1",
+				"private": "^0.1.8",
+				"slash": "^1.0.0",
+				"source-map": "^0.5.7"
+			}
+		},
+		"babel-generator": {
+			"version": "6.26.1",
+			"resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.1.tgz",
+			"integrity": "sha512-HyfwY6ApZj7BYTcJURpM5tznulaBvyio7/0d4zFOeMPUmfxkCjHocCuoLa2SAGzBI8AREcH3eP3758F672DppA==",
+			"dev": true,
+			"requires": {
+				"babel-messages": "^6.23.0",
+				"babel-runtime": "^6.26.0",
+				"babel-types": "^6.26.0",
+				"detect-indent": "^4.0.0",
+				"jsesc": "^1.3.0",
+				"lodash": "^4.17.4",
+				"source-map": "^0.5.7",
+				"trim-right": "^1.0.1"
+			},
+			"dependencies": {
+				"jsesc": {
+					"version": "1.3.0",
+					"resolved": "https://registry.npmjs.org/jsesc/-/jsesc-1.3.0.tgz",
+					"integrity": "sha1-RsP+yMGJKxKwgz25vHYiF226s0s=",
+					"dev": true
+				}
+			}
+		},
+		"babel-helper-bindify-decorators": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-bindify-decorators/-/babel-helper-bindify-decorators-6.24.1.tgz",
+			"integrity": "sha1-FMGeXxQte0fxmlJDHlKxzLxAozA=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-builder-binary-assignment-operator-visitor": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-builder-binary-assignment-operator-visitor/-/babel-helper-builder-binary-assignment-operator-visitor-6.24.1.tgz",
+			"integrity": "sha1-zORReto1b0IgvK6KAsKzRvmlZmQ=",
+			"dev": true,
+			"requires": {
+				"babel-helper-explode-assignable-expression": "^6.24.1",
+				"babel-runtime": "^6.22.0",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-call-delegate": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz",
+			"integrity": "sha1-7Oaqzdx25Bw0YfiL/Fdb0Nqi340=",
+			"dev": true,
+			"requires": {
+				"babel-helper-hoist-variables": "^6.24.1",
+				"babel-runtime": "^6.22.0",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-define-map": {
+			"version": "6.26.0",
+			"resolved": "https://registry.npmjs.org/babel-helper-define-map/-/babel-helper-define-map-6.26.0.tgz",
+			"integrity": "sha1-pfVtq0GiX5fstJjH66ypgZ+Vvl8=",
+			"dev": true,
+			"requires": {
+				"babel-helper-function-name": "^6.24.1",
+				"babel-runtime": "^6.26.0",
+				"babel-types": "^6.26.0",
+				"lodash": "^4.17.4"
+			}
+		},
+		"babel-helper-explode-assignable-expression": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-explode-assignable-expression/-/babel-helper-explode-assignable-expression-6.24.1.tgz",
+			"integrity": "sha1-8luCz33BBDPFX3BZLVdGQArCLKo=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-explode-class": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-explode-class/-/babel-helper-explode-class-6.24.1.tgz",
+			"integrity": "sha1-fcKjkQ3uAHBW4eMdZAztPVTqqes=",
+			"dev": true,
+			"requires": {
+				"babel-helper-bindify-decorators": "^6.24.1",
+				"babel-runtime": "^6.22.0",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-function-name": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz",
+			"integrity": "sha1-00dbjAPtmCQqJbSDUasYOZ01gKk=",
+			"dev": true,
+			"requires": {
+				"babel-helper-get-function-arity": "^6.24.1",
+				"babel-runtime": "^6.22.0",
+				"babel-template": "^6.24.1",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-get-function-arity": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-get-function-arity/-/babel-helper-get-function-arity-6.24.1.tgz",
+			"integrity": "sha1-j3eCqpNAfEHTqlCQj4mwMbG2hT0=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-hoist-variables": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-hoist-variables/-/babel-helper-hoist-variables-6.24.1.tgz",
+			"integrity": "sha1-HssnaJydJVE+rbyZFKc/VAi+enY=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-optimise-call-expression": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-optimise-call-expression/-/babel-helper-optimise-call-expression-6.24.1.tgz",
+			"integrity": "sha1-96E0J7qfc/j0+pk8VKl4gtEkQlc=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-regex": {
+			"version": "6.26.0",
+			"resolved": "https://registry.npmjs.org/babel-helper-regex/-/babel-helper-regex-6.26.0.tgz",
+			"integrity": "sha1-MlxZ+QL4LyS3T6zu0DY5VPZJXnI=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.26.0",
+				"babel-types": "^6.26.0",
+				"lodash": "^4.17.4"
+			}
+		},
+		"babel-helper-remap-async-to-generator": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-remap-async-to-generator/-/babel-helper-remap-async-to-generator-6.24.1.tgz",
+			"integrity": "sha1-XsWBgnrXI/7N04HxySg5BnbkVRs=",
+			"dev": true,
+			"requires": {
+				"babel-helper-function-name": "^6.24.1",
+				"babel-runtime": "^6.22.0",
+				"babel-template": "^6.24.1",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helper-replace-supers": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helper-replace-supers/-/babel-helper-replace-supers-6.24.1.tgz",
+			"integrity": "sha1-v22/5Dk40XNpohPKiov3S2qQqxo=",
+			"dev": true,
+			"requires": {
+				"babel-helper-optimise-call-expression": "^6.24.1",
+				"babel-messages": "^6.23.0",
+				"babel-runtime": "^6.22.0",
+				"babel-template": "^6.24.1",
+				"babel-traverse": "^6.24.1",
+				"babel-types": "^6.24.1"
+			}
+		},
+		"babel-helpers": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-helpers/-/babel-helpers-6.24.1.tgz",
+			"integrity": "sha1-NHHenK7DiOXIUOWX5Yom3fN2ArI=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0",
+				"babel-template": "^6.24.1"
+			}
+		},
+		"babel-messages": {
+			"version": "6.23.0",
+			"resolved": "https://registry.npmjs.org/babel-messages/-/babel-messages-6.23.0.tgz",
+			"integrity": "sha1-8830cDhYA1sqKVHG7F7fbGLyYw4=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0"
+			}
+		},
+		"babel-plugin-check-es2015-constants": {
+			"version": "6.22.0",
+			"resolved": "https://registry.npmjs.org/babel-plugin-check-es2015-constants/-/babel-plugin-check-es2015-constants-6.22.0.tgz",
+			"integrity": "sha1-NRV7EBQm/S/9PaP3XH0ekYNbv4o=",
+			"dev": true,
+			"requires": {
+				"babel-runtime": "^6.22.0"
+			}
+		},
+		"babel-plugin-syntax-async-functions": {
+			"version": "6.13.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz",
+			"integrity": "sha1-ytnK0RkbWtY0vzCuCHI5HgZHvpU=",
+			"dev": true
+		},
+		"babel-plugin-syntax-async-generators": {
+			"version": "6.13.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-6.13.0.tgz",
+			"integrity": "sha1-a8lj67FuzLrmuStZbrfzXDQqi5o=",
+			"dev": true
+		},
+		"babel-plugin-syntax-class-properties": {
+			"version": "6.13.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-class-properties/-/babel-plugin-syntax-class-properties-6.13.0.tgz",
+			"integrity": "sha1-1+sjt5oxf4VDlixQW4J8fWysJ94=",
+			"dev": true
+		},
+		"babel-plugin-syntax-decorators": {
+			"version": "6.13.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-decorators/-/babel-plugin-syntax-decorators-6.13.0.tgz",
+			"integrity": "sha1-MSVjtNvePMgGzuPkFszurd0RrAs=",
+			"dev": true
+		},
+		"babel-plugin-syntax-dynamic-import": {
+			"version": "6.18.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-dynamic-import/-/babel-plugin-syntax-dynamic-import-6.18.0.tgz",
+			"integrity": "sha1-jWomIpyDdFqZgqRBBRVyyqF5sdo=",
+			"dev": true
+		},
+		"babel-plugin-syntax-exponentiation-operator": {
+			"version": "6.13.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz",
+			"integrity": "sha1-nufoM3KQ2pUoggGmpX9BcDF4MN4=",
+			"dev": true
+		},
+		"babel-plugin-syntax-object-rest-spread": {
+			"version": "6.13.0",
+			"resolved": "http://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
+			"integrity": "sha1-/WU28rzhODb/o6VFjEkDpZe7O/U=",
+			"dev": true
+		},
+		"babel-plugin-syntax-trailing-function-commas": {
+			"version": "6.22.0",
+			"resolved": "https://registry.npmjs.org/babel-plugin-syntax-trailing-function-commas/-/babel-plugin-syntax-trailing-function-commas-6.22.0.tgz",
+			"integrity": "sha1-ugNgk3+NBuQBgKQ/4NVhb/9TLPM=",
+			"dev": true
+		},
+		"babel-plugin-transform-async-generator-functions": {
+			"version": "6.24.1",
+			"resolved": "https://registry.npmjs.org/babel-plugin-transform-async-generator-functions/-/babel-plugin-transform-async-generator-functions-6.24.1.tgz",
+			"integrity": "sha1-8FiQAUX9PpkHpt3yjaWfIVJYpds=",
+			"dev": true,
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 		},
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@@ -701,6 +1570,12 @@
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+			"resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.2.tgz",
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 				"content-disposition": "0.5.2",
-				"content-type": "1.0.4",
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-				"escape-html": "1.0.3",
-				"etag": "1.8.1",
+				"depd": "~1.1.2",
+				"encodeurl": "~1.0.2",
+				"escape-html": "~1.0.3",
+				"etag": "~1.8.1",
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-				"parseurl": "1.3.2",
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-				"type-is": "1.6.16",
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@@ -863,15 +1738,15 @@
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 						"bytes": "3.0.0",
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 						"debug": "2.6.9",
-						"depd": "1.1.2",
-						"http-errors": "1.6.3",
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@@ -908,7 +1783,7 @@
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-								"statuses": "1.4.0"
+								"statuses": ">= 1.3.1 < 2"
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@@ -955,7 +1830,7 @@
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@@ -969,12 +1844,12 @@
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-				"parseurl": "1.3.2",
-				"statuses": "1.4.0",
-				"unpipe": "1.0.0"
+				"encodeurl": "~1.0.2",
+				"escape-html": "~1.0.3",
+				"on-finished": "~2.3.0",
+				"parseurl": "~1.3.2",
+				"statuses": "~1.4.0",
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-				"escape-html": "1.0.3",
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-				"request": "2.88.0",
-				"xhr": "2.5.0"
+				"body-parser": "^1.16.0",
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+			"integrity": "sha1-xB8vbDn8FtHNF61LXYlhFK5HDVU=",
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@@ -2244,9 +3278,9 @@
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@@ -2265,7 +3299,7 @@
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@@ -2274,11 +3308,11 @@
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@@ -2296,7 +3330,7 @@
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@@ -2305,7 +3339,7 @@
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-						"pify": "2.3.0",
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@@ -2342,8 +3376,8 @@
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 					"dev": true,
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-						"read-pkg": "1.1.0"
+						"find-up": "^1.0.0",
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@@ -2352,9 +3386,9 @@
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@@ -2363,7 +3397,7 @@
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@@ -2378,20 +3412,20 @@
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+						"cliui": "^3.2.0",
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+						"get-caller-file": "^1.0.1",
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+						"require-directory": "^2.1.1",
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+						"set-blocking": "^2.0.0",
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+						"which-module": "^1.0.0",
+						"window-size": "^0.2.0",
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@@ -2400,20 +3434,35 @@
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-						"lodash.assign": "4.2.0"
+						"camelcase": "^3.0.0",
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+		"source-map": {
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+			"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+			"integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+			"dev": true
+		},
+		"source-map-support": {
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+			"resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.4.18.tgz",
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+			"dev": true,
+			"requires": {
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+			}
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-				"spdx-license-ids": "3.0.1"
+				"spdx-expression-parse": "^3.0.0",
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@@ -2428,8 +3477,8 @@
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-				"spdx-license-ids": "3.0.1"
+				"spdx-exceptions": "^2.1.0",
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@@ -2443,15 +3492,15 @@
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+				"asn1": "~0.2.3",
+				"assert-plus": "^1.0.0",
+				"bcrypt-pbkdf": "^1.0.0",
+				"dashdash": "^1.12.0",
+				"ecc-jsbn": "~0.1.1",
+				"getpass": "^0.1.1",
+				"jsbn": "~0.1.0",
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@@ -2469,7 +3518,16 @@
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 			"requires": {
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+				"safe-buffer": "~5.1.0"
+			}
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+		"strip-ansi": {
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+			"resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+			"integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+			"dev": true,
+			"requires": {
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@@ -2478,7 +3536,7 @@
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@@ -2486,7 +3544,7 @@
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 			"requires": {
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@@ -2497,24 +3555,30 @@
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+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+			"integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+			"dev": true
+		},
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-				"setimmediate": "1.0.5",
-				"tar.gz": "1.0.7",
-				"xhr-request-promise": "0.1.2"
+				"bluebird": "^3.5.0",
+				"buffer": "^5.0.5",
+				"decompress": "^4.0.0",
+				"eth-lib": "^0.1.26",
+				"fs-extra": "^2.1.2",
+				"fs-promise": "^2.0.0",
+				"got": "^7.1.0",
+				"mime-types": "^2.1.16",
+				"mkdirp-promise": "^5.0.1",
+				"mock-fs": "^4.1.0",
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@@ -2522,8 +3586,8 @@
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-						"jsonfile": "2.4.0"
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@@ -2533,9 +3597,9 @@
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-				"fstream": "1.0.11",
-				"inherits": "2.0.3"
+				"block-stream": "*",
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@@ -2543,13 +3607,13 @@
 			"resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-1.6.2.tgz",
 			"integrity": "sha512-rzS0heiNf8Xn7/mpdSVVSMAWAoy9bfb1WOTYC78Z0UQKeKa/CWS8FOq0lKGNa8DWKAn9gxjCvMLYc5PGXYlK2A==",
 			"requires": {
-				"bl": "1.2.2",
-				"buffer-alloc": "1.2.0",
-				"end-of-stream": "1.4.1",
-				"fs-constants": "1.0.0",
-				"readable-stream": "2.3.6",
-				"to-buffer": "1.1.1",
-				"xtend": "4.0.1"
+				"bl": "^1.0.0",
+				"buffer-alloc": "^1.2.0",
+				"end-of-stream": "^1.0.0",
+				"fs-constants": "^1.0.0",
+				"readable-stream": "^2.3.0",
+				"to-buffer": "^1.1.1",
+				"xtend": "^4.0.0"
 			}
 		},
 		"tar.gz": {
@@ -2557,11 +3621,11 @@
 			"resolved": "https://registry.npmjs.org/tar.gz/-/tar.gz-1.0.7.tgz",
 			"integrity": "sha512-uhGatJvds/3diZrETqMj4RxBR779LKlIE74SsMcn5JProZsfs9j0QBwWO1RW+IWNJxS2x8Zzra1+AW6OQHWphg==",
 			"requires": {
-				"bluebird": "2.11.0",
-				"commander": "2.11.0",
-				"fstream": "1.0.11",
-				"mout": "0.11.1",
-				"tar": "2.2.1"
+				"bluebird": "^2.9.34",
+				"commander": "^2.8.1",
+				"fstream": "^1.0.8",
+				"mout": "^0.11.0",
+				"tar": "^2.1.1"
 			},
 			"dependencies": {
 				"bluebird": {
@@ -2576,7 +3640,7 @@
 			"resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.0.tgz",
 			"integrity": "sha1-5p44obq+lpsBCCB5eLn2K4hgSDk=",
 			"requires": {
-				"any-promise": "1.3.0"
+				"any-promise": "^1.0.0"
 			}
 		},
 		"thenify-all": {
@@ -2584,7 +3648,7 @@
 			"resolved": "https://registry.npmjs.org/thenify-all/-/thenify-all-1.6.0.tgz",
 			"integrity": "sha1-GhkY1ALY/D+Y+/I02wvMjMEOlyY=",
 			"requires": {
-				"thenify": "3.3.0"
+				"thenify": ">= 3.1.0 < 4"
 			}
 		},
 		"through": {
@@ -2602,13 +3666,19 @@
 			"resolved": "https://registry.npmjs.org/to-buffer/-/to-buffer-1.1.1.tgz",
 			"integrity": "sha512-lx9B5iv7msuFYE3dytT+KE5tap+rNYw+K4jVkb9R/asAb+pbBSM17jtunHplhBe6RRJdZx3Pn2Jph24O32mOVg=="
 		},
+		"to-fast-properties": {
+			"version": "1.0.3",
+			"resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-1.0.3.tgz",
+			"integrity": "sha1-uDVx+k2MJbguIxsG46MFXeTKGkc=",
+			"dev": true
+		},
 		"tough-cookie": {
 			"version": "2.4.3",
 			"resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
 			"integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
 			"requires": {
-				"psl": "1.1.29",
-				"punycode": "1.4.1"
+				"psl": "^1.1.24",
+				"punycode": "^1.4.1"
 			}
 		},
 		"trim": {
@@ -2616,13 +3686,19 @@
 			"resolved": "https://registry.npmjs.org/trim/-/trim-0.0.1.tgz",
 			"integrity": "sha1-WFhUf2spB1fulczMZm+1AITEYN0="
 		},
+		"trim-right": {
+			"version": "1.0.1",
+			"resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
+			"integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
+			"dev": true
+		},
 		"truffle": {
 			"version": "4.1.14",
 			"resolved": "https://registry.npmjs.org/truffle/-/truffle-4.1.14.tgz",
 			"integrity": "sha512-e7tTLvKP3bN9dE7MagfWyFjy4ZgoEGbeujECy1me1ENBzbj/aO/+45gs72qsL3+3IkCNNcWNOJjjrm8BYZZNNg==",
 			"dev": true,
 			"requires": {
-				"mocha": "4.1.0",
+				"mocha": "^4.1.0",
 				"original-require": "1.0.1",
 				"solc": "0.4.24"
 			}
@@ -2632,7 +3708,7 @@
 			"resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
 			"integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
 			"requires": {
-				"safe-buffer": "5.1.2"
+				"safe-buffer": "^5.0.1"
 			}
 		},
 		"tweetnacl": {
@@ -2653,7 +3729,7 @@
 			"integrity": "sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==",
 			"requires": {
 				"media-typer": "0.3.0",
-				"mime-types": "2.1.20"
+				"mime-types": "~2.1.18"
 			}
 		},
 		"typedarray-to-buffer": {
@@ -2661,7 +3737,7 @@
 			"resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
 			"integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
 			"requires": {
-				"is-typedarray": "1.0.0"
+				"is-typedarray": "^1.0.0"
 			}
 		},
 		"ultron": {
@@ -2674,8 +3750,8 @@
 			"resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.3.0.tgz",
 			"integrity": "sha512-kE2WkurNnPUMcryNioS68DDbhoPB8Qxsd8btHSj+sd5Pjh2GsjmeHLzMSqV9HHziAo8FzVxVCJl9ZYhk7yY1pA==",
 			"requires": {
-				"buffer": "3.6.0",
-				"through": "2.3.8"
+				"buffer": "^3.0.1",
+				"through": "^2.3.6"
 			},
 			"dependencies": {
 				"base64-js": {
@@ -2689,8 +3765,8 @@
 					"integrity": "sha1-pyyTb3e5a/UvX357RnGAYoVR3vs=",
 					"requires": {
 						"base64-js": "0.0.8",
-						"ieee754": "1.1.12",
-						"isarray": "1.0.0"
+						"ieee754": "^1.1.4",
+						"isarray": "^1.0.0"
 					}
 				}
 			}
@@ -2710,7 +3786,7 @@
 			"resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
 			"integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
 			"requires": {
-				"prepend-http": "1.0.4"
+				"prepend-http": "^1.0.1"
 			}
 		},
 		"url-set-query": {
@@ -2749,8 +3825,8 @@
 			"integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
 			"dev": true,
 			"requires": {
-				"spdx-correct": "3.0.0",
-				"spdx-expression-parse": "3.0.0"
+				"spdx-correct": "^3.0.0",
+				"spdx-expression-parse": "^3.0.0"
 			}
 		},
 		"vary": {
@@ -2763,9 +3839,9 @@
 			"resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
 			"integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
 			"requires": {
-				"assert-plus": "1.0.0",
+				"assert-plus": "^1.0.0",
 				"core-util-is": "1.0.2",
-				"extsprintf": "1.3.0"
+				"extsprintf": "^1.2.0"
 			}
 		},
 		"web3": {
@@ -2908,9 +3984,9 @@
 					"resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.2.7.tgz",
 					"integrity": "sha1-L5Pxex4jrsN1nNSj/iDBKGo/wco=",
 					"requires": {
-						"bn.js": "4.11.8",
-						"elliptic": "6.4.1",
-						"xhr-request-promise": "0.1.2"
+						"bn.js": "^4.11.6",
+						"elliptic": "^6.4.0",
+						"xhr-request-promise": "^0.1.2"
 					}
 				},
 				"uuid": {
@@ -3051,11 +4127,12 @@
 		},
 		"websocket": {
 			"version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
+			"from": "websocket@git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
 			"requires": {
-				"debug": "2.6.9",
-				"nan": "2.10.0",
-				"typedarray-to-buffer": "3.1.5",
-				"yaeti": "0.0.6"
+				"debug": "^2.2.0",
+				"nan": "^2.3.3",
+				"typedarray-to-buffer": "^3.1.2",
+				"yaeti": "^0.0.6"
 			}
 		},
 		"window-size": {
@@ -3070,8 +4147,8 @@
 			"integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
 			"dev": true,
 			"requires": {
-				"string-width": "1.0.2",
-				"strip-ansi": "3.0.1"
+				"string-width": "^1.0.1",
+				"strip-ansi": "^3.0.1"
 			},
 			"dependencies": {
 				"ansi-regex": {
@@ -3086,7 +4163,7 @@
 					"integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
 					"dev": true,
 					"requires": {
-						"number-is-nan": "1.0.1"
+						"number-is-nan": "^1.0.0"
 					}
 				},
 				"string-width": {
@@ -3095,9 +4172,9 @@
 					"integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
 					"dev": true,
 					"requires": {
-						"code-point-at": "1.1.0",
-						"is-fullwidth-code-point": "1.0.0",
-						"strip-ansi": "3.0.1"
+						"code-point-at": "^1.0.0",
+						"is-fullwidth-code-point": "^1.0.0",
+						"strip-ansi": "^3.0.0"
 					}
 				},
 				"strip-ansi": {
@@ -3106,7 +4183,7 @@
 					"integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
 					"dev": true,
 					"requires": {
-						"ansi-regex": "2.1.1"
+						"ansi-regex": "^2.0.0"
 					}
 				}
 			}
@@ -3121,9 +4198,9 @@
 			"resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
 			"integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
 			"requires": {
-				"async-limiter": "1.0.0",
-				"safe-buffer": "5.1.2",
-				"ultron": "1.1.1"
+				"async-limiter": "~1.0.0",
+				"safe-buffer": "~5.1.0",
+				"ultron": "~1.1.0"
 			}
 		},
 		"xhr": {
@@ -3131,10 +4208,10 @@
 			"resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
 			"integrity": "sha512-4nlO/14t3BNUZRXIXfXe+3N6w3s1KoxcJUUURctd64BLRe67E4gRwp4PjywtDY72fXpZ1y6Ch0VZQRY/gMPzzQ==",
 			"requires": {
-				"global": "4.3.2",
-				"is-function": "1.0.1",
-				"parse-headers": "2.0.1",
-				"xtend": "4.0.1"
+				"global": "~4.3.0",
+				"is-function": "^1.0.1",
+				"parse-headers": "^2.0.0",
+				"xtend": "^4.0.0"
 			}
 		},
 		"xhr-request": {
@@ -3142,13 +4219,13 @@
 			"resolved": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.1.0.tgz",
 			"integrity": "sha512-Y7qzEaR3FDtL3fP30k9wO/e+FBnBByZeybKOhASsGP30NIkRAAkKD/sCnLvgEfAIEC1rcmK7YG8f4oEnIrrWzA==",
 			"requires": {
-				"buffer-to-arraybuffer": "0.0.5",
-				"object-assign": "4.1.1",
-				"query-string": "5.1.1",
-				"simple-get": "2.8.1",
-				"timed-out": "4.0.1",
-				"url-set-query": "1.0.0",
-				"xhr": "2.5.0"
+				"buffer-to-arraybuffer": "^0.0.5",
+				"object-assign": "^4.1.1",
+				"query-string": "^5.0.1",
+				"simple-get": "^2.7.0",
+				"timed-out": "^4.0.1",
+				"url-set-query": "^1.0.0",
+				"xhr": "^2.0.4"
 			}
 		},
 		"xhr-request-promise": {
@@ -3156,7 +4233,7 @@
 			"resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.2.tgz",
 			"integrity": "sha1-NDxE0e53JrhkgGloLQ+EDIO0Jh0=",
 			"requires": {
-				"xhr-request": "1.1.0"
+				"xhr-request": "^1.0.1"
 			}
 		},
 		"xhr2-cookies": {
@@ -3164,7 +4241,7 @@
 			"resolved": "https://registry.npmjs.org/xhr2-cookies/-/xhr2-cookies-1.1.0.tgz",
 			"integrity": "sha1-fXdEnQmZGX8VXLc7I99yUF7YnUg=",
 			"requires": {
-				"cookiejar": "2.1.2"
+				"cookiejar": "^2.1.1"
 			}
 		},
 		"xmlhttprequest": {
@@ -3193,8 +4270,8 @@
 			"resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
 			"integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
 			"requires": {
-				"buffer-crc32": "0.2.13",
-				"fd-slicer": "1.1.0"
+				"buffer-crc32": "~0.2.3",
+				"fd-slicer": "~1.1.0"
 			}
 		}
 	}
diff --git a/packages/vouching/package.json b/packages/vouching/package.json
index ec3bc7a89..46e56b6e1 100644
--- a/packages/vouching/package.json
+++ b/packages/vouching/package.json
@@ -18,6 +18,13 @@
     "zos-lib": "2.0.0-alpha.0"
   },
   "devDependencies": {
+    "babel-plugin-transform-object-rest-spread": "^6.26.0",
+    "babel-polyfill": "^6.26.0",
+    "babel-preset-env": "^1.7.0",
+    "babel-preset-es2015": "^6.24.1",
+    "babel-preset-stage-2": "^6.24.1",
+    "babel-preset-stage-3": "^6.24.1",
+    "babel-register": "^6.26.0",
     "chai": "^4.1.2",
     "chai-bignumber": "^2.0.2",
     "truffle": "^4.1.14"
diff --git a/packages/vouching/test/ZEPToken.test.js b/packages/vouching/test/ZEPToken.test.js
deleted file mode 100644
index 3fd5f41a7..000000000
--- a/packages/vouching/test/ZEPToken.test.js
+++ /dev/null
@@ -1,47 +0,0 @@
-const { encodeCall, assertRevert } = require('zos-lib')
-const BigNumber = web3.BigNumber;
-
-const ZEPToken = artifacts.require('ZEPToken');
-
-require('chai')
-  .use(require('chai-bignumber')(BigNumber))
-  .should();
-
-contract('ZEPToken', ([ _, owner, another, jurisdiction]) => {
-  const attributeID = 0;
-
-  beforeEach('deploy and initialize ZEP token', async function () {
-    this.zepToken = await ZEPToken.new({ from: owner });
-    const initializeData = encodeCall('initialize', ['address', 'uint256'], [jurisdiction, attributeID]);
-    await this.zepToken.sendTransaction({ data: initializeData, from: owner });
-  });
-
-  it('has a name', async function () {
-    const name = await this.zepToken.name({ from: another });
-    name.should.be.equal('ZeppelinOS Token');
-  });
-
-  it('has a symbol', async function () {
-    const symbol = await this.zepToken.symbol({ from: another });
-    symbol.should.be.equal('ZEP');
-  });
-
-  it('has an amount of decimals', async function () {
-    const decimals = await this.zepToken.decimals({ from: another });
-    decimals.should.be.bignumber.equal(18);
-  });
-
-  it('has the correct total supply', async function () {
-    const totalZEP = new BigNumber('100000000e18');
-    (await this.zepToken.totalSupply({ from: another })).should.be.bignumber.equal(totalZEP);
-  })
-
-  it('can be paused by creator', async function () {
-    await this.zepToken.pause({ from: owner });
-  })
-
-  it('cannot be paused by anybody', async function () {
-    await assertRevert(this.zepToken.pause({ from: another }));
-  })
-});
-
diff --git a/packages/vouching/test/Vouching.test.js b/packages/vouching/test/contracts/Vouching.test.js
similarity index 97%
rename from packages/vouching/test/Vouching.test.js
rename to packages/vouching/test/contracts/Vouching.test.js
index 17c69fabc..37ebd4235 100644
--- a/packages/vouching/test/Vouching.test.js
+++ b/packages/vouching/test/contracts/Vouching.test.js
@@ -1,8 +1,6 @@
-const { encodeCall, assertRevert } = require('zos-lib')
-const expectEvent = require('./helpers/expectEvent');
+import { encodeCall, assertEvent, assertRevert } from 'zos-lib'
 
 const BigNumber = web3.BigNumber;
-
 const ZepToken = artifacts.require('ZEPToken');
 const Vouching = artifacts.require('Vouching');
 const ZEPValidator = artifacts.require('ZEPValidator');
@@ -104,7 +102,7 @@ contract('Vouching', function ([_, tokenOwner, vouchingOwner, developer, transfe
         const result = await this.vouching.create(
           dependencyName, developer, dependencyAddress, stakeAmount, { from: developer }
         );
-        const dependencyCreatedEvent = expectEvent.inLogs(result.logs, 'DependencyCreated', {
+        const dependencyCreatedEvent = assertEvent.inLogs(result.logs, 'DependencyCreated', {
           nameHash: web3.sha3(dependencyName),
           name: dependencyName,
           owner: developer,
@@ -155,7 +153,7 @@ contract('Vouching', function ([_, tokenOwner, vouchingOwner, developer, transfe
           );
 
           (await this.vouching.getDependency(dependencyName))[1].should.equal(transferee);
-          expectEvent.inLogs(
+          assertEvent.inLogs(
             result.logs, 'OwnershipTransferred', { oldOwner: developer, newOwner: transferee }
           );
         });
@@ -195,7 +193,7 @@ contract('Vouching', function ([_, tokenOwner, vouchingOwner, developer, transfe
 
         it('emits Vouched event', async function () {
           const result = await this.vouching.vouch(dependencyName, stakeAmount, { from: developer });
-          const vouchedEvent = expectEvent.inLogs(result.logs, 'Vouched', {
+          const vouchedEvent = assertEvent.inLogs(result.logs, 'Vouched', {
             nameHash: web3.sha3(dependencyName)
           });
           vouchedEvent.args.amount.should.be.bignumber.equal(stakeAmount);
@@ -249,7 +247,7 @@ contract('Vouching', function ([_, tokenOwner, vouchingOwner, developer, transfe
 
         it('emits Unvouched event', async function () {
           const result = await this.vouching.unvouch(dependencyName, safeUnstakeAmount, { from: developer });
-          const unvouchedEvent = expectEvent.inLogs(result.logs, 'Unvouched', {
+          const unvouchedEvent = assertEvent.inLogs(result.logs, 'Unvouched', {
             nameHash: web3.sha3(dependencyName)
           });
           unvouchedEvent.args.amount.should.be.bignumber.equal(safeUnstakeAmount);
@@ -292,7 +290,7 @@ contract('Vouching', function ([_, tokenOwner, vouchingOwner, developer, transfe
 
         it('emits a DependencyRemoved event', async function () {
           const result = await this.vouching.remove(dependencyName, { from: developer });
-          expectEvent.inLogs(result.logs, 'DependencyRemoved', {
+          assertEvent.inLogs(result.logs, 'DependencyRemoved', {
             nameHash: web3.sha3(dependencyName)
           });
         });
@@ -328,4 +326,3 @@ contract('Vouching', function ([_, tokenOwner, vouchingOwner, developer, transfe
     });
   });
 });
-
diff --git a/packages/vouching/test/contracts/ZEPToken.test.js b/packages/vouching/test/contracts/ZEPToken.test.js
new file mode 100644
index 000000000..3d265ceb1
--- /dev/null
+++ b/packages/vouching/test/contracts/ZEPToken.test.js
@@ -0,0 +1,167 @@
+import { encodeCall, assertRevert } from 'zos-lib'
+
+const BigNumber = web3.BigNumber;
+const ZEPToken = artifacts.require('ZEPToken');
+const ZEPValidator = artifacts.require('ZEPValidator');
+const BasicJurisdiction = artifacts.require('BasicJurisdiction');
+
+require('chai')
+  .use(require('chai-bignumber')(BigNumber))
+  .should();
+
+contract('ZEPToken', ([ _, tokenOwner, another, jurisdictionOwner, validatorOwner, zeppelin ]) => {
+  const receiveTokensAttributeID = 999
+  const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000'
+
+  beforeEach('initialize jurisdiction', async function () {
+    this.jurisdiction = await BasicJurisdiction.new()
+    const initializeJurisdictionData = encodeCall('initialize', [], [])
+    await this.jurisdiction.sendTransaction({ data: initializeJurisdictionData, from: jurisdictionOwner })
+  })
+
+  beforeEach('initialize ZEP token', async function () {
+    this.zepToken = await ZEPToken.new()
+    const initializeData = encodeCall('initialize', ['address', 'uint256'], [this.jurisdiction.address, receiveTokensAttributeID])
+    await this.zepToken.sendTransaction({ data: initializeData, from: tokenOwner })
+  });
+
+  it('has a name', async function () {
+    const name = await this.zepToken.name({ from: another });
+    name.should.be.equal('ZeppelinOS Token');
+  });
+
+  it('has a symbol', async function () {
+    const symbol = await this.zepToken.symbol({ from: another });
+    symbol.should.be.equal('ZEP');
+  });
+
+  it('has an amount of decimals', async function () {
+    const decimals = await this.zepToken.decimals({ from: another });
+    decimals.should.be.bignumber.equal(18);
+  });
+
+  it('has the correct total supply', async function () {
+    const totalZEP = new BigNumber('100000000e18');
+    (await this.zepToken.totalSupply({ from: another })).should.be.bignumber.equal(totalZEP);
+  })
+
+  it('can be paused by creator', async function () {
+    await this.zepToken.pause({ from: tokenOwner });
+  })
+
+  it('cannot be paused by anybody', async function () {
+    await assertRevert(this.zepToken.pause({ from: another }));
+  })
+
+  describe('TPL', function () {
+    const amount = '5e18'
+    const sender = tokenOwner
+    const recipient = another
+
+    beforeEach('initialize and approve validator', async function () {
+      this.validator = await ZEPValidator.new()
+      const initializeValidatorData = encodeCall('initialize', ['address', 'uint256'], [this.jurisdiction.address, receiveTokensAttributeID])
+      await this.validator.sendTransaction({ data: initializeValidatorData, from: validatorOwner })
+
+      await this.jurisdiction.addValidator(this.validator.address, "ZEP Validator", { from: jurisdictionOwner })
+      await this.jurisdiction.addAttributeType(receiveTokensAttributeID, false, false, ZERO_ADDRESS, 0, 0, 0, "can transfer", { from: jurisdictionOwner })
+      await this.jurisdiction.addValidatorApproval(this.validator.address, receiveTokensAttributeID, { from: jurisdictionOwner })
+      await this.validator.addOrganization(zeppelin, 100, "ZEP Org", { from: validatorOwner })
+    })
+
+    function assertTokensCannotBeTransferred() {
+      it('cannot transfer', async function () {
+        assert.equal(await this.zepToken.canTransfer(recipient, amount, { from: sender }), false)
+        await assertRevert(this.zepToken.transfer(recipient, amount, { from: sender }))
+      })
+
+      it('cannot transfer from', async function () {
+        await this.zepToken.approve(recipient, amount, { from: sender })
+
+        assert.equal(await this.zepToken.canTransferFrom(sender, recipient, amount, { from: recipient }), false)
+        await assertRevert(this.zepToken.transferFrom(sender, recipient, amount, { from: recipient }))
+      })
+    }
+
+    function assertTokensCanBeTransferred() {
+      it('can transfer', async function () {
+        assert(await this.zepToken.canTransfer(recipient, amount, { from: sender }))
+        await this.zepToken.transfer(recipient, amount, { from: sender })
+
+        assert((await this.zepToken.balanceOf(recipient)).eq(amount))
+      })
+
+      it('can transfer from', async function () {
+        await this.zepToken.approve(recipient, amount, { from: sender })
+
+        assert(await this.zepToken.canTransferFrom(sender, recipient, amount, { from: recipient }))
+        await this.zepToken.transferFrom(sender, recipient, amount, { from: recipient })
+
+        assert((await this.zepToken.balanceOf(recipient)).eq(amount))
+      })
+    }
+
+    describe('when no one was not allowed to receive tokens', function () {
+      assertTokensCannotBeTransferred()
+    })
+
+    describe('when the sender was allowed to receive tokens', function () {
+      beforeEach('allow sender to transfer', async function () {
+        await this.validator.issueAttribute(sender, { from: zeppelin })
+      })
+
+      assertTokensCannotBeTransferred()
+    })
+
+    describe('when the recipient was allowed to receive tokens', function () {
+      beforeEach('allow recipiennt to transfer', async function () {
+        await this.validator.issueAttribute(recipient, { from: zeppelin })
+      })
+
+      assertTokensCanBeTransferred()
+
+      describe('when the recipient attribute was revoked', function () {
+        beforeEach('revoke recipient attribute', async function () {
+          // TODO: this should be allowed to be done through the validator
+          await this.jurisdiction.removeAttributeFrom(recipient, receiveTokensAttributeID, { from: jurisdictionOwner })
+        })
+
+        assertTokensCannotBeTransferred()
+      })
+
+      describe('when the validator approval is removed', function () {
+        beforeEach('remove validator approval', async function () {
+          await this.jurisdiction.removeValidatorApproval(this.validator.address, receiveTokensAttributeID, { from: jurisdictionOwner })
+        })
+
+        assertTokensCannotBeTransferred()
+      })
+    })
+
+    describe('when the sender and recipient were allowed to receive tokens', function () {
+      beforeEach('allow sender and recipient to transfer', async function () {
+        await this.validator.issueAttribute(sender, { from: zeppelin })
+        await this.validator.issueAttribute(recipient, { from: zeppelin })
+      })
+
+      assertTokensCanBeTransferred()
+
+      describe('when the recipient attribute was revoked', function () {
+        beforeEach('revoke recipient attribute', async function () {
+          // TODO: this should be allowed to be done through the validator
+          await this.jurisdiction.removeAttributeFrom(recipient, receiveTokensAttributeID, { from: jurisdictionOwner })
+        })
+
+        assertTokensCannotBeTransferred()
+      })
+
+      describe('when the validator approval is removed', function () {
+        beforeEach('remove validator approval', async function () {
+          await this.jurisdiction.removeValidatorApproval(this.validator.address, receiveTokensAttributeID, { from: jurisdictionOwner })
+        })
+
+        assertTokensCannotBeTransferred()
+      })
+    })
+  })
+});
diff --git a/packages/vouching/test/helpers/expectEvent.js b/packages/vouching/test/helpers/expectEvent.js
deleted file mode 100644
index 37fa1083e..000000000
--- a/packages/vouching/test/helpers/expectEvent.js
+++ /dev/null
@@ -1,33 +0,0 @@
-const should = require('chai').should();
-
-function inLogs (logs, eventName, eventArgs = {}) {
-  const event = logs.find(function (e) {
-    if (e.event === eventName) {
-      let matches = true;
-
-      for (const [k, v] of Object.entries(eventArgs)) {
-        if (e.args[k] !== v) {
-          matches = false;
-        }
-      }
-
-      if (matches) {
-        return true;
-      }
-    }
-  });
-
-  should.exist(event);
-
-  return event;
-}
-
-async function inTransaction (tx, eventName, eventArgs = {}) {
-  const { logs } = await tx;
-  return inLogs(logs, eventName, eventArgs);
-}
-
-module.exports = {
-  inLogs,
-  inTransaction,
-};
diff --git a/packages/vouching/truffle-config.js b/packages/vouching/truffle-config.js
index 3b4d1d8b3..bb0747aca 100644
--- a/packages/vouching/truffle-config.js
+++ b/packages/vouching/truffle-config.js
@@ -1,3 +1,6 @@
+require('babel-register')
+require('babel-polyfill')
+
 module.exports = {
   networks: {
     local: {