Upgrade migrate (#1643)

2019-10-14 16:10:48 +02:00 · 2019-10-14 16:10:48 +02:00 · a244b01a26
parent 676602f2ed
commit a244b01a26
43 changed files with 1374 additions and 309 deletions
--- a/_assets/build/Dockerfile
+++ b/_assets/build/Dockerfile
@ -1,5 +1,5 @@
 # Build status-go in a Go builder container
-FROM golang:1.12.5-alpine as builder
+FROM golang:1.13-alpine as builder

 RUN apk add --no-cache make gcc musl-dev linux-headers

--- a/go.mod
+++ b/go.mod
@ -1,6 +1,6 @@
 module github.com/status-im/status-go

-go 1.12
+go 1.13

 replace github.com/ethereum/go-ethereum v1.9.5 => github.com/status-im/go-ethereum v1.9.5-status.4

@ -29,9 +29,9 @@ require (
 	github.com/russolsen/transit v0.0.0-20180705123435-0794b4c4505a
 	github.com/status-im/doubleratchet v2.0.0+incompatible
 	github.com/status-im/keycard-go v0.0.0-20190424133014-d95853db0f48 // indirect
-	github.com/status-im/migrate/v4 v4.3.1-status.0.20190822050738-a9d340ec8fb7
+	github.com/status-im/migrate/v4 v4.6.2-status.2
 	github.com/status-im/rendezvous v1.3.0
-	github.com/status-im/status-protocol-go v0.3.1
+	github.com/status-im/status-protocol-go v0.4.2
 	github.com/status-im/whisper v1.5.1
 	github.com/stretchr/testify v1.4.0
 	github.com/syndtr/goleveldb v1.0.0
--- a/go.sum
+++ b/go.sum
@ -69,6 +69,8 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
 github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
 github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c/go.mod h1:XGLbWH/ujMcbPbhZq52Nv6UrCghb1yGn//133kEsvDk=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
+github.com/containerd/containerd v1.2.7 h1:8lqLbl7u1j3MmiL9cJ/O275crSq7bfwUayvvatEupQk=
+github.com/containerd/containerd v1.2.7/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
@ -105,8 +107,8 @@ github.com/docker/distribution v2.7.0+incompatible h1:neUDAlf3wX6Ml4HdqTrbcOHXtf
 github.com/docker/distribution v2.7.0+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.0.0-20180625184442-8e610b2b55bf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/docker v0.7.3-0.20190103212154-2b7e084dc98b/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf h1:2v/98rHzs3v6X0AHtoCH9u+e56SdnpogB1Z2fFe1KqQ=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282 h1:mzrx39dGtGq0VEnTHjnakmczd4uFbhx2cZU3BJDsLdc=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
@ -151,10 +153,8 @@ github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/gogo/protobuf v1.3.0 h1:G8O7TerXerS4F6sx9OV7/nRfJdnXgHZu/S/7F2SN+UE=
 github.com/gogo/protobuf v1.3.0/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
-github.com/golang-migrate/migrate v3.5.4+incompatible h1:R7OzwvCJTCgwapPCiX6DyBiu2czIUMDCB118gFTKTUA=
-github.com/golang-migrate/migrate v3.5.4+incompatible/go.mod h1:IsVUlFN5puWOmXrqjgGUfIRIbU7mr8oNBE2tyERd9Wk=
-github.com/golang-migrate/migrate/v4 v4.5.0 h1:ucd2qJu1BAKTtmjh7QlWYiq01DwlE/xXYQkOPE0ZTsI=
-github.com/golang-migrate/migrate/v4 v4.5.0/go.mod h1:SzAcz2l+yDJVhQC7fwiF7T2MAFPMIkigJz98klRJ4OE=
+github.com/golang-migrate/migrate/v4 v4.6.2 h1:LDDOHo/q1W5UDj6PbkxdCv7lv9yunyZHXvxuwDkGo3k=
+github.com/golang-migrate/migrate/v4 v4.6.2/go.mod h1:JYi6reN3+Z734VZ0akNuyOJNcrg45ZL7LDBMW3WGJL0=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@ -417,7 +417,8 @@ github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
-github.com/mongodb/mongo-go-driver v0.3.0/go.mod h1:NK/HWDIIZkaYsnYa0hmtP443T5ELr0KDecmIioVuuyU=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c h1:nXxl5PrvVm2L/wCy8dQu6DMTwH4oIuGN8GJDAlqDdVE=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/mr-tron/base58 v1.1.0/go.mod h1:xcD2VGqlgYjBdcBLw+TuYLr8afG+Hj8g2eTVqeSzSU8=
 github.com/mr-tron/base58 v1.1.1/go.mod h1:xcD2VGqlgYjBdcBLw+TuYLr8afG+Hj8g2eTVqeSzSU8=
 github.com/mr-tron/base58 v1.1.2 h1:ZEw4I2EgPKDJ2iEw0cNmLB3ROrEmkOtXIkaG7wZg+78=
@ -555,13 +556,14 @@ github.com/status-im/go-multiaddr-ethv4 v1.2.0 h1:OT84UsUzTCwguqCpJqkrCMiL4VZ1Sv
 github.com/status-im/go-multiaddr-ethv4 v1.2.0/go.mod h1:2VQ3C+9zEurcceasz12gPAtmEzCeyLUGPeKLSXYQKHo=
 github.com/status-im/keycard-go v0.0.0-20190424133014-d95853db0f48 h1:ju5UTwk5Odtm4trrY+4Ca4RMj5OyXbmVeDAVad2T0Jw=
 github.com/status-im/keycard-go v0.0.0-20190424133014-d95853db0f48/go.mod h1:RZLeN1LMWmRsyYjvAu+I6Dm9QmlDaIIt+Y+4Kd7Tp+Q=
-github.com/status-im/migrate/v4 v4.0.0-20190821140204-a9d340ec8fb76af4afda06acf01740d45d2661ed/go.mod h1:r8HggRBZ/k7TRwByq/Hp3P/ubFppIna0nvyavVK0pjA=
-github.com/status-im/migrate/v4 v4.3.1-status.0.20190822050738-a9d340ec8fb7 h1:gWtw0g41Y55lIOjUikkx0qjSfzl5lNZWhsvzWZIdtvQ=
-github.com/status-im/migrate/v4 v4.3.1-status.0.20190822050738-a9d340ec8fb7/go.mod h1:r8HggRBZ/k7TRwByq/Hp3P/ubFppIna0nvyavVK0pjA=
+github.com/status-im/migrate/v4 v4.6.2-status.2 h1:SdC+sMDl/aI7vUlwD2qj2p7KsK4T60IS9z4/rYCCbI8=
+github.com/status-im/migrate/v4 v4.6.2-status.2/go.mod h1:c/kc90n47GZu/58nnz1OMLTf7uE4Da4gZP5qmU+A/v8=
 github.com/status-im/rendezvous v1.3.0 h1:7RK/MXXW+tlm0asKm1u7Qp7Yni6AO29a7j8+E4Lbjg4=
 github.com/status-im/rendezvous v1.3.0/go.mod h1:+hzjuP+j/XzLPeF6E50b88pWOTLdTcwjvNYt+Gh1W1s=
-github.com/status-im/status-protocol-go v0.3.1 h1:UrYdxKeW1GlFDtXWLyR66ebhUxmH1yWy46kal7gaSZ0=
-github.com/status-im/status-protocol-go v0.3.1/go.mod h1:GyEipgAnT0gBMF57gN1yPAicFMM66VZEe2E8M5ktErI=
+github.com/status-im/status-protocol-go v0.4.1-0.20191014103017-1f15a058b66c h1:e0WWnear7T8mXXmU7kKMOrnxGQ95AJOjDJTp58Do0Iw=
+github.com/status-im/status-protocol-go v0.4.1-0.20191014103017-1f15a058b66c/go.mod h1:a1kbCiz4yIs2lxJEHsp5eFjdhB+5RUTN8+Uec6wWa4s=
+github.com/status-im/status-protocol-go v0.4.2 h1:HAX51q3j+WAzbyeqryJEY1O6hqzTAbYEjkppIXkcNvg=
+github.com/status-im/status-protocol-go v0.4.2/go.mod h1:WsfEnZo8dWadTbMqAoLztC/5p9SDwFeEGCmVDzSEmrQ=
 github.com/status-im/whisper v1.5.1 h1:87/XIg0Wjua7lXBGiEXgAfTOqlt2Q1dMDuxugTyZbbA=
 github.com/status-im/whisper v1.5.1/go.mod h1:emrOxzJme0k66QtbbQ2bdd3P8RCdLZ8sTD7SkwH1s2s=
 github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570 h1:gIlAHnH1vJb5vwEjIp5kBj/eu99p/bl0Ay2goiPe5xE=
@ -586,8 +588,10 @@ github.com/tyler-smith/go-bip39 v1.0.2/go.mod h1:sJ5fKU0s6JVwZjjcUEX2zFOnvq0ASQ2
 github.com/uber/jaeger-client-go v0.0.0-20180607151842-f7e0d4744fa6/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
 github.com/uber/jaeger-lib v0.0.0-20180615202729-a51202d6f4a7/go.mod h1:ComeNDZlWwrWnDv8aPp0Ba6+uUTzImX/AauajbLI56U=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
-github.com/vacp2p/mvds v0.0.21 h1:YeYja8noKsHvrnOHM4pqjBvDwwy+kUzXMkX1IBYJAbU=
-github.com/vacp2p/mvds v0.0.21/go.mod h1:pIqr2Hg4cIkTJniGPCp4ptong2jxgxx6uToVoY94+II=
+github.com/vacp2p/mvds v0.0.23-0.20191014101555-026e462c829d h1:kc/9/ZbwyqIKQ2phzmPpBYGx7v2olwD2P7Uj8KKd+Bw=
+github.com/vacp2p/mvds v0.0.23-0.20191014101555-026e462c829d/go.mod h1:uUmtiahU7efOVl/5w5yk9jOze5xYpDZDrSrT8TvHXjQ=
+github.com/vacp2p/mvds v0.0.23 h1:BKdn7tyGvl/J/Pwv6FlcW6Xbzm+17jv141GB1mFXyOU=
+github.com/vacp2p/mvds v0.0.23/go.mod h1:uUmtiahU7efOVl/5w5yk9jOze5xYpDZDrSrT8TvHXjQ=
 github.com/whyrusleeping/go-keyspace v0.0.0-20160322163242-5b898ac5add1/go.mod h1:8UvriyWtv5Q5EOgjHaSseUEdkQfvwFv1I/In/O2M9gc=
 github.com/whyrusleeping/go-logging v0.0.0-20170515211332-0457bb6b88fc h1:9lDbC6Rz4bwmou+oE6Dt4Cb2BGMur5eR/GYptkKUVHo=
 github.com/whyrusleeping/go-logging v0.0.0-20170515211332-0457bb6b88fc/go.mod h1:bopw91TMyo8J3tvftk8xmU2kPmlrt4nScJQZU2hE5EM=
@ -607,6 +611,7 @@ github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhe
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b/go.mod h1:T3BPAOm2cqquPa0MKWeNkmOM5RQsRhkrwMWonFMN7fE=
+go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.1 h1:8dP3SGL7MPB94crU3bEPplMPe83FI4EouesJUeFHv50=
--- a/vendor/github.com/golang-migrate/migrate/v4/.travis.yml
+++ b/vendor/github.com/golang-migrate/migrate/v4/.travis.yml
@ -26,8 +26,15 @@ cache:
  directories:
    - $GOPATH/pkg

+
 before_install:
-  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.16.0
+  # Update docker to latest version: https://docs.travis-ci.com/user/docker/#installing-a-newer-docker-version
+  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+  - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+  - sudo apt-get update
+  - sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
+  # Install golangci-lint
+  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.17.1
  - echo "TRAVIS_GO_VERSION=${TRAVIS_GO_VERSION}"

 install:
--- a/vendor/github.com/golang-migrate/migrate/v4/Dockerfile
+++ b/vendor/github.com/golang-migrate/migrate/v4/Dockerfile
@ -1,4 +1,4 @@
-FROM golang:1.12-alpine3.9 AS downloader
+FROM golang:1.12-alpine3.10 AS downloader
 ARG VERSION

 RUN apk add --no-cache git gcc musl-dev
@ -11,9 +11,9 @@ ENV GO111MODULE=on
 ENV DATABASES="postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver"
 ENV SOURCES="file go_bindata github github_ee aws_s3 google_cloud_storage godoc_vfs gitlab"

-RUN go build -a -o build/migrate.linux-386 -ldflags="-X main.Version=${VERSION}" -tags "$DATABASES $SOURCES" ./cmd/migrate
+RUN go build -a -o build/migrate.linux-386 -ldflags="-s -w -X main.Version=${VERSION}" -tags "$DATABASES $SOURCES" ./cmd/migrate

-FROM alpine:3.9
+FROM alpine:3.10

 RUN apk add --no-cache ca-certificates

--- a/vendor/github.com/golang-migrate/migrate/v4/FAQ.md
+++ b/vendor/github.com/golang-migrate/migrate/v4/FAQ.md
@ -68,3 +68,9 @@
 Database-specific locking features are used by *some* database drivers to prevent multiple instances of migrate from running migrations at the same time
  the same database at the same time. For example, the MySQL driver uses the `GET_LOCK` function, while the Postgres driver uses
  the `pg_advisory_lock` function.
+
+#### Do I need to create a table for tracking migration version used?
+No, it is done automatically.
+
+#### Can I use migrate with a non-Go project?
+Yes, you can use the migrate CLI in a non-Go project, but there are probably other libraries/frameworks available that offer better test and deploy integrations in that language/framework.
--- a/vendor/github.com/golang-migrate/migrate/v4/GETTING_STARTED.md
+++ b/vendor/github.com/golang-migrate/migrate/v4/GETTING_STARTED.md
@ -0,0 +1,43 @@
+# Getting started
+Before you start, you should understand the concept of forward/up and reverse/down database migrations.
+
+Configure a database for your application. Make sure that your database driver is supported [here](README.md#databases)
+
+## Create migrations
+Create some migrations using migrate CLI. Here is an example:
+```
+migrate create -ext sql -dir db/migrations -seq create_users_table
+```
+Once you create your files, you should fill them.
+
+**IMPORTANT:** In a project developed by more than one person there is a chance of migrations inconsistency - e.g. two developers can create conflicting migrations, and the developer that created his migration later gets it merged to the repository first.
+Developers and Teams should keep an eye on such cases (especially during code review).
+[Here](https://github.com/golang-migrate/migrate/issues/179#issuecomment-475821264) is the issue summary if you would like to read more.
+
+Consider making your migrations idempotent - we can run the same sql code twice in a row with the same result. This makes our migrations more robust. On the other hand, it causes slightly less control over database schema - e.g. let's say you forgot to drop the table in down migration. You run down migration - the table is still there. When you run up migration again - `CREATE TABLE` would return an error, helping you find an issue in down migration, while `CREATE TABLE IF NOT EXISTS` would not. Use those conditions wisely.
+
+In case you would like to run several commands/queries in one migration, you should wrap them in a transaction (if your database supports it).
+This way if one of commands fails, our database will remain unchanged.
+
+## Run migrations
+Run your migrations through the CLI or your app and check if they applied expected changes.
+Just to give you an idea:
+```
+migrate -database YOUR_DATBASE_URL -path PATH_TO_YOUR_MIGRATIONS up
+```
+
+Just add the code to your app and you're ready to go!
+
+Before commiting your migrations you should run your migrations up, down, and then up again to see if migrations are working properly both ways.
+(e.g. if you created a table in a migration but reverse migration did not delete it, you will encounter an error when running the forward migration again)
+It's also worth checking your migrations in a separate, containerized environment. You can find some tools in the end of this document.
+
+**IMPORTANT:** If you would like to run multiple instances of your app on different machines be sure to use a database that supports locking when running migrations. Otherwise you may encounter issues.
+
+## Further reading:
+- [PostgreSQL tutorial](database/postgres/TUTORIAL.md)
+- [Best practices](MIGRATIONS.md)
+- [FAQ](FAQ.md)
+- Tools for testing your migrations in a container:
+	- https://github.com/dhui/dktest
+	- https://github.com/ory/dockertest
--- a/vendor/github.com/golang-migrate/migrate/v4/README.md
+++ b/vendor/github.com/golang-migrate/migrate/v4/README.md
@ -5,6 +5,7 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/migrate/migrate.svg)](https://hub.docker.com/r/migrate/migrate/)
 ![Supported Go Versions](https://img.shields.io/badge/Go-1.11%2C%201.12-lightgrey.svg)
 [![GitHub Release](https://img.shields.io/github/release/golang-migrate/migrate.svg)](https://github.com/golang-migrate/migrate/releases)
+[![Go Report Card](https://goreportcard.com/badge/github.com/golang-migrate/migrate)](https://goreportcard.com/report/github.com/golang-migrate/migrate) 

 # migrate

@ -139,6 +140,16 @@ func main() {
 }
 ```

+## Getting started
+
+Go to [getting started](GETTING_STARTED.md)
+
+## Tutorials
+
+- [PostgreSQL](database/postgres/TUTORIAL.md)
+
+(more tutorials to come)
+
 ## Migration files

 Each migration has an up and down migration. [Why?](FAQ.md#why-two-separate-files-up-and-down-for-a-migration)
--- a/vendor/github.com/golang-migrate/migrate/v4/database/driver.go
+++ b/vendor/github.com/golang-migrate/migrate/v4/database/driver.go
@ -7,8 +7,9 @@ package database
 import (
 	"fmt"
 	"io"
-	nurl "net/url"
 	"sync"
+
+	iurl "github.com/golang-migrate/migrate/v4/internal/url"
 )

 var (
@ -81,21 +82,16 @@ type Driver interface {

 // Open returns a new driver instance.
 func Open(url string) (Driver, error) {
-	u, err := nurl.Parse(url)
+	scheme, err := iurl.SchemeFromURL(url)
 	if err != nil {
-		return nil, fmt.Errorf("Unable to parse URL. Did you escape all reserved URL characters? "+
-			"See: https://github.com/golang-migrate/migrate#database-urls Error: %v", err)
-	}
-
-	if u.Scheme == "" {
-		return nil, fmt.Errorf("database driver: invalid URL scheme")
+		return nil, err
 	}

 	driversMu.RLock()
-	d, ok := drivers[u.Scheme]
+	d, ok := drivers[scheme]
 	driversMu.RUnlock()
 	if !ok {
-		return nil, fmt.Errorf("database driver: unknown driver %v (forgotten import?)", u.Scheme)
+		return nil, fmt.Errorf("database driver: unknown driver %v (forgotten import?)", scheme)
 	}

 	return d.Open(url)
--- a/vendor/github.com/golang-migrate/migrate/v4/go.mod
+++ b/vendor/github.com/golang-migrate/migrate/v4/go.mod
@ -7,10 +7,11 @@ require (
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
 	github.com/cockroachdb/apd v1.1.0 // indirect
 	github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c
+	github.com/containerd/containerd v1.2.7 // indirect
 	github.com/cznic/ql v1.2.0
 	github.com/denisenkom/go-mssqldb v0.0.0-20190515213511-eb9f6a1743f3
 	github.com/dhui/dktest v0.3.0
-	github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf
+	github.com/docker/docker v0.7.3-0.20190817195342-4760db040282
 	github.com/fsouza/fake-gcs-server v1.7.0
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/gocql/gocql v0.0.0-20190301043612-f6df8288f9b4
@ -28,7 +29,7 @@ require (
 	github.com/kshvakov/clickhouse v1.3.5
 	github.com/lib/pq v1.0.0
 	github.com/mattn/go-sqlite3 v1.10.0
-	github.com/mongodb/mongo-go-driver v0.3.0
+	github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c // indirect
 	github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/satori/go.uuid v1.2.0 // indirect
@ -40,6 +41,7 @@ require (
 	github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c // indirect
 	github.com/xdg/stringprep v1.0.0 // indirect
 	gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b // indirect
+	go.mongodb.org/mongo-driver v1.1.0
 	golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734 // indirect
 	golang.org/x/net v0.0.0-20190424112056-4829fb13d2c6
 	golang.org/x/oauth2 v0.0.0-20190402181905-9f3314589c9a // indirect
--- a/vendor/github.com/golang-migrate/migrate/v4/go.sum
+++ b/vendor/github.com/golang-migrate/migrate/v4/go.sum
@ -26,6 +26,8 @@ github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I
 github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
 github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c h1:2zRrJWIt/f9c9HhNHAgrRgq0San5gRRUJTBXLkchal0=
 github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c/go.mod h1:XGLbWH/ujMcbPbhZq52Nv6UrCghb1yGn//133kEsvDk=
+github.com/containerd/containerd v1.2.7 h1:8lqLbl7u1j3MmiL9cJ/O275crSq7bfwUayvvatEupQk=
+github.com/containerd/containerd v1.2.7/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/cznic/b v0.0.0-20180115125044-35e9bbe41f07 h1:UHFGPvSxX4C4YBApSPvmUfL8tTvWLj2ryqvT9K4Jcuk=
 github.com/cznic/b v0.0.0-20180115125044-35e9bbe41f07/go.mod h1:URriBxXwVq5ijiJ12C7iIZqlA69nTlI+LgI6/pwftG8=
 github.com/cznic/fileutil v0.0.0-20180108211300-6a051e75936f h1:7uSNgsgcarNk4oiN/nNkO0J7KAjlsF5Yv5Gf/tFdHas=
@ -56,8 +58,8 @@ github.com/dhui/dktest v0.3.0/go.mod h1:cyzIUfGsBEbZ6BT7tnXqAShHSXCZhSNmFl70sZ7c
 github.com/docker/distribution v2.7.0+incompatible h1:neUDAlf3wX6Ml4HdqTrbcOHXtfRN0TFIwt6YFL7N9RU=
 github.com/docker/distribution v2.7.0+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.7.3-0.20190103212154-2b7e084dc98b/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf h1:2v/98rHzs3v6X0AHtoCH9u+e56SdnpogB1Z2fFe1KqQ=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282 h1:mzrx39dGtGq0VEnTHjnakmczd4uFbhx2cZU3BJDsLdc=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
@ -147,8 +149,8 @@ github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
 github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
-github.com/mongodb/mongo-go-driver v0.3.0 h1:00tKWMrabkVU1e57/TTP4ZBIfhn/wmjlSiRnIM9d0T8=
-github.com/mongodb/mongo-go-driver v0.3.0/go.mod h1:NK/HWDIIZkaYsnYa0hmtP443T5ELr0KDecmIioVuuyU=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c h1:nXxl5PrvVm2L/wCy8dQu6DMTwH4oIuGN8GJDAlqDdVE=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8 h1:P48LjvUQpTReR3TQRbxSeSBsMXzfK0uol7eRcr7VBYQ=
 github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8/go.mod h1:86wM1zFnC6/uDBfZGNwB65O+pR2OFi5q/YQaEUid1qA=
@ -196,6 +198,8 @@ github.com/xdg/stringprep v1.0.0 h1:d9X0esnoa3dFsV0FG35rAT0RIhYFlPq7MiP+DW89La0=
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b h1:7gd+rd8P3bqcn/96gOZa3F5dpJr/vEiDQYlNb/y2uNs=
 gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b/go.mod h1:T3BPAOm2cqquPa0MKWeNkmOM5RQsRhkrwMWonFMN7fE=
+go.mongodb.org/mongo-driver v1.1.0 h1:aeOqSrhl9eDRAap/3T5pCfMBEBxZ0vuXBP+RMtp2KX8=
+go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.opencensus.io v0.20.1 h1:pMEjRZ1M4ebWGikflH7nQpV6+Zr88KBMA2XJD3sbijw=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0 h1:mU6zScU4U1YAFPHEHYk+3JC4SY7JxgkqS10ZOSyksNg=
--- a/vendor/github.com/golang-migrate/migrate/v4/internal/url/url.go
+++ b/vendor/github.com/golang-migrate/migrate/v4/internal/url/url.go
@ -0,0 +1,25 @@
+package url
+
+import (
+	"errors"
+	"strings"
+)
+
+var errNoScheme = errors.New("no scheme")
+var errEmptyURL = errors.New("URL cannot be empty")
+
+// schemeFromURL returns the scheme from a URL string
+func SchemeFromURL(url string) (string, error) {
+	if url == "" {
+		return "", errEmptyURL
+	}
+
+	i := strings.Index(url, ":")
+
+	// No : or : is the first character.
+	if i < 1 {
+		return "", errNoScheme
+	}
+
+	return url[0:i], nil
+}
--- a/vendor/github.com/golang-migrate/migrate/v4/migrate.go
+++ b/vendor/github.com/golang-migrate/migrate/v4/migrate.go
@ -7,12 +7,14 @@ package migrate
 import (
 	"errors"
 	"fmt"
-	"github.com/hashicorp/go-multierror"
 	"os"
 	"sync"
 	"time"

+	"github.com/hashicorp/go-multierror"
+
 	"github.com/golang-migrate/migrate/v4/database"
+	iurl "github.com/golang-migrate/migrate/v4/internal/url"
 	"github.com/golang-migrate/migrate/v4/source"
 )

@ -85,13 +87,13 @@ type Migrate struct {
 func New(sourceURL, databaseURL string) (*Migrate, error) {
 	m := newCommon()

-	sourceName, err := sourceSchemeFromURL(sourceURL)
+	sourceName, err := iurl.SchemeFromURL(sourceURL)
 	if err != nil {
 		return nil, err
 	}
 	m.sourceName = sourceName

-	databaseName, err := databaseSchemeFromURL(databaseURL)
+	databaseName, err := iurl.SchemeFromURL(databaseURL)
 	if err != nil {
 		return nil, err
 	}
@ -119,7 +121,7 @@ func New(sourceURL, databaseURL string) (*Migrate, error) {
 func NewWithDatabaseInstance(sourceURL string, databaseName string, databaseInstance database.Driver) (*Migrate, error) {
 	m := newCommon()

-	sourceName, err := schemeFromURL(sourceURL)
+	sourceName, err := iurl.SchemeFromURL(sourceURL)
 	if err != nil {
 		return nil, err
 	}
@ -145,7 +147,7 @@ func NewWithDatabaseInstance(sourceURL string, databaseName string, databaseInst
 func NewWithSourceInstance(sourceName string, sourceInstance source.Driver, databaseURL string) (*Migrate, error) {
 	m := newCommon()

-	databaseName, err := schemeFromURL(databaseURL)
+	databaseName, err := iurl.SchemeFromURL(databaseURL)
 	if err != nil {
 		return nil, err
 	}
@ -804,6 +806,7 @@ func (m *Migrate) versionExists(version uint) (result error) {
 		return err
 	}

+	m.logErr(fmt.Errorf("no migration found for version %d", version))
 	return os.ErrNotExist
 }

--- a/vendor/github.com/golang-migrate/migrate/v4/util.go
+++ b/vendor/github.com/golang-migrate/migrate/v4/util.go
@ -1,7 +1,6 @@
 package migrate

 import (
-	"errors"
 	"fmt"
 	nurl "net/url"
 	"strings"
@ -49,42 +48,6 @@ func suint(n int) uint {
 	return uint(n)
 }

-var errNoScheme = errors.New("no scheme")
-var errEmptyURL = errors.New("URL cannot be empty")
-
-func sourceSchemeFromURL(url string) (string, error) {
-	u, err := schemeFromURL(url)
-	if err != nil {
-		return "", fmt.Errorf("source: %v", err)
-	}
-	return u, nil
-}
-
-func databaseSchemeFromURL(url string) (string, error) {
-	u, err := schemeFromURL(url)
-	if err != nil {
-		return "", fmt.Errorf("database: %v", err)
-	}
-	return u, nil
-}
-
-// schemeFromURL returns the scheme from a URL string
-func schemeFromURL(url string) (string, error) {
-	if url == "" {
-		return "", errEmptyURL
-	}
-
-	u, err := nurl.Parse(url)
-	if err != nil {
-		return "", err
-	}
-	if len(u.Scheme) == 0 {
-		return "", errNoScheme
-	}
-
-	return u.Scheme, nil
-}
-
 // FilterCustomQuery filters all query values starting with `x-`
 func FilterCustomQuery(u *nurl.URL) *nurl.URL {
 	ux := *u
--- a/vendor/github.com/status-im/migrate/v4/.golangci.yml
+++ b/vendor/github.com/status-im/migrate/v4/.golangci.yml
@ -1,6 +1,6 @@
 run:
  # timeout for analysis, e.g. 30s, 5m, default is 1m
-  deadline: 2m
+  timeout: 2m
 linters:
  enable:
    #- golint
--- a/vendor/github.com/status-im/migrate/v4/.travis.yml
+++ b/vendor/github.com/status-im/migrate/v4/.travis.yml
@ -6,8 +6,8 @@ matrix:
    - go: master
  include:
    # Supported versions of Go: https://golang.org/dl/
-    - go: "1.11.x"
    - go: "1.12.x"
+    - go: "1.13.x"
    - go: master

 go_import_path: github.com/golang-migrate/migrate
@ -26,8 +26,15 @@ cache:
  directories:
    - $GOPATH/pkg

+
 before_install:
-  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.16.0
+  # Update docker to latest version: https://docs.travis-ci.com/user/docker/#installing-a-newer-docker-version
+  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+  - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+  - sudo apt-get update
+  - sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
+  # Install golangci-lint
+  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.20.0
  - echo "TRAVIS_GO_VERSION=${TRAVIS_GO_VERSION}"

 install:
--- a/vendor/github.com/status-im/migrate/v4/Dockerfile
+++ b/vendor/github.com/status-im/migrate/v4/Dockerfile
@ -1,4 +1,4 @@
-FROM golang:1.12-alpine3.9 AS downloader
+FROM golang:1.12-alpine3.10 AS downloader
 ARG VERSION

 RUN apk add --no-cache git gcc musl-dev
@ -9,11 +9,11 @@ COPY . ./

 ENV GO111MODULE=on
 ENV DATABASES="postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver"
-ENV SOURCES="file go_bindata github aws_s3 google_cloud_storage godoc_vfs gitlab"
+ENV SOURCES="file go_bindata github github_ee aws_s3 google_cloud_storage godoc_vfs gitlab"

-RUN go build -a -o build/migrate.linux-386 -ldflags="-X main.Version=${VERSION}" -tags "$DATABASES $SOURCES" ./cmd/migrate
+RUN go build -a -o build/migrate.linux-386 -ldflags="-s -w -X main.Version=${VERSION}" -tags "$DATABASES $SOURCES" ./cmd/migrate

-FROM alpine:3.9
+FROM alpine:3.10

 RUN apk add --no-cache ca-certificates

--- a/vendor/github.com/status-im/migrate/v4/FAQ.md
+++ b/vendor/github.com/status-im/migrate/v4/FAQ.md
@ -68,3 +68,9 @@
 Database-specific locking features are used by *some* database drivers to prevent multiple instances of migrate from running migrations at the same time
  the same database at the same time. For example, the MySQL driver uses the `GET_LOCK` function, while the Postgres driver uses
  the `pg_advisory_lock` function.
+
+#### Do I need to create a table for tracking migration version used?
+No, it is done automatically.
+
+#### Can I use migrate with a non-Go project?
+Yes, you can use the migrate CLI in a non-Go project, but there are probably other libraries/frameworks available that offer better test and deploy integrations in that language/framework.
--- a/vendor/github.com/status-im/migrate/v4/GETTING_STARTED.md
+++ b/vendor/github.com/status-im/migrate/v4/GETTING_STARTED.md
@ -0,0 +1,43 @@
+# Getting started
+Before you start, you should understand the concept of forward/up and reverse/down database migrations.
+
+Configure a database for your application. Make sure that your database driver is supported [here](README.md#databases)
+
+## Create migrations
+Create some migrations using migrate CLI. Here is an example:
+```
+migrate create -ext sql -dir db/migrations -seq create_users_table
+```
+Once you create your files, you should fill them.
+
+**IMPORTANT:** In a project developed by more than one person there is a chance of migrations inconsistency - e.g. two developers can create conflicting migrations, and the developer that created his migration later gets it merged to the repository first.
+Developers and Teams should keep an eye on such cases (especially during code review).
+[Here](https://github.com/golang-migrate/migrate/issues/179#issuecomment-475821264) is the issue summary if you would like to read more.
+
+Consider making your migrations idempotent - we can run the same sql code twice in a row with the same result. This makes our migrations more robust. On the other hand, it causes slightly less control over database schema - e.g. let's say you forgot to drop the table in down migration. You run down migration - the table is still there. When you run up migration again - `CREATE TABLE` would return an error, helping you find an issue in down migration, while `CREATE TABLE IF NOT EXISTS` would not. Use those conditions wisely.
+
+In case you would like to run several commands/queries in one migration, you should wrap them in a transaction (if your database supports it).
+This way if one of commands fails, our database will remain unchanged.
+
+## Run migrations
+Run your migrations through the CLI or your app and check if they applied expected changes.
+Just to give you an idea:
+```
+migrate -database YOUR_DATBASE_URL -path PATH_TO_YOUR_MIGRATIONS up
+```
+
+Just add the code to your app and you're ready to go!
+
+Before commiting your migrations you should run your migrations up, down, and then up again to see if migrations are working properly both ways.
+(e.g. if you created a table in a migration but reverse migration did not delete it, you will encounter an error when running the forward migration again)
+It's also worth checking your migrations in a separate, containerized environment. You can find some tools in the end of this document.
+
+**IMPORTANT:** If you would like to run multiple instances of your app on different machines be sure to use a database that supports locking when running migrations. Otherwise you may encounter issues.
+
+## Further reading:
+- [PostgreSQL tutorial](database/postgres/TUTORIAL.md)
+- [Best practices](MIGRATIONS.md)
+- [FAQ](FAQ.md)
+- Tools for testing your migrations in a container:
+	- https://github.com/dhui/dktest
+	- https://github.com/ory/dockertest
--- a/vendor/github.com/status-im/migrate/v4/MIGRATIONS.md
+++ b/vendor/github.com/status-im/migrate/v4/MIGRATIONS.md
@ -44,9 +44,14 @@ It is suggested that the version number of corresponding `up` and `down` migrati
 files be equivalent for clarity, but they are allowed to differ so long as the
 relative ordering of the migrations is preserved.

-The migration files are permitted to be empty, so in the event that a migration
-is a no-op or is irreversible, it is recommended to still include both migration
-files, and either leaving them empty or adding a comment as appropriate.
+The migration files are permitted to be "empty", in the event that a migration
+is a no-op or is irreversible. It is recommended to still include both migration
+files by making the whole migration file consist of a comment.
+If your database does not support comments, then deleting the migration file will also work.
+Note, an actual empty file (e.g. a 0 byte file) may cause issues with your database since migrate
+will attempt to run an empty query. In this case, deleting the migration file will also work.
+For the rational of this behavior see:
+[#244 (comment)](https://github.com/golang-migrate/migrate/issues/244#issuecomment-510758270)

 ## Migration Content Format

--- a/vendor/github.com/status-im/migrate/v4/Makefile
+++ b/vendor/github.com/status-im/migrate/v4/Makefile
@ -1,4 +1,4 @@
-SOURCE ?= file go_bindata github aws_s3 google_cloud_storage godoc_vfs gitlab
+SOURCE ?= file go_bindata github github_ee aws_s3 google_cloud_storage godoc_vfs gitlab
 DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb clickhouse mongodb sqlserver
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=
@ -27,27 +27,14 @@ test-short:
 test:
 	@-rm -r $(COVERAGE_DIR)
 	@mkdir $(COVERAGE_DIR)
-	make test-with-flags TEST_FLAGS='-v -race -covermode atomic -coverprofile $$(COVERAGE_DIR)/_$$(RAND).txt -bench=. -benchmem -timeout 20m'
-	@echo 'mode: atomic' > $(COVERAGE_DIR)/combined.txt
-	@cat $(COVERAGE_DIR)/_*.txt | grep -v 'mode: atomic' >> $(COVERAGE_DIR)/combined.txt
+	make test-with-flags TEST_FLAGS='-v -race -covermode atomic -coverprofile $$(COVERAGE_DIR)/combined.txt -bench=. -benchmem -timeout 20m'


 test-with-flags:
-	@echo SOURCE: $(SOURCE) 
+	@echo SOURCE: $(SOURCE)
 	@echo DATABASE: $(DATABASE)

-	@go test $(TEST_FLAGS) .
-	@go test $(TEST_FLAGS) ./cli/...
-	@go test $(TEST_FLAGS) ./database
-	@go test $(TEST_FLAGS) ./testing/...
-
-	@echo -n '$(SOURCE)' | tr -s ' ' '\n' | xargs -I{} go test $(TEST_FLAGS) ./source/{}
-	@go test $(TEST_FLAGS) ./source/testing/...
-	@go test $(TEST_FLAGS) ./source/stub/...
-
-	@echo -n '$(DATABASE)' | tr -s ' ' '\n' | xargs -I{} go test $(TEST_FLAGS) ./database/{}
-	@go test $(TEST_FLAGS) ./database/testing/...
-	@go test $(TEST_FLAGS) ./database/stub/...
+	@go test $(TEST_FLAGS) ./...


 kill-orphaned-docker-containers:
@ -84,7 +71,7 @@ rewrite-import-paths:
 docs:
 	-make kill-docs
 	nohup godoc -play -http=127.0.0.1:6064 </dev/null >/dev/null 2>&1 & echo $$! > .godoc.pid
-	cat .godoc.pid  
+	cat .godoc.pid


 kill-docs:
--- a/vendor/github.com/status-im/migrate/v4/README.md
+++ b/vendor/github.com/status-im/migrate/v4/README.md
@ -3,19 +3,19 @@
 [![Coverage Status](https://img.shields.io/coveralls/github/golang-migrate/migrate/master.svg)](https://coveralls.io/github/golang-migrate/migrate?branch=master)
 [![packagecloud.io](https://img.shields.io/badge/deb-packagecloud.io-844fec.svg)](https://packagecloud.io/golang-migrate/migrate?filter=debs)
 [![Docker Pulls](https://img.shields.io/docker/pulls/migrate/migrate.svg)](https://hub.docker.com/r/migrate/migrate/)
-![Supported Go Versions](https://img.shields.io/badge/Go-1.11%2C%201.12-lightgrey.svg)
+![Supported Go Versions](https://img.shields.io/badge/Go-1.12%2C%201.13-lightgrey.svg)
 [![GitHub Release](https://img.shields.io/github/release/golang-migrate/migrate.svg)](https://github.com/golang-migrate/migrate/releases)
-
+[![Go Report Card](https://goreportcard.com/badge/github.com/golang-migrate/migrate)](https://goreportcard.com/report/github.com/golang-migrate/migrate) 

 # migrate

 __Database migrations written in Go. Use as [CLI](#cli-usage) or import as [library](#use-in-your-go-project).__

- * Migrate reads migrations from [sources](#migration-sources)
+* Migrate reads migrations from [sources](#migration-sources)
   and applies them in correct order to a [database](#databases).
- * Drivers are "dumb", migrate glues everything together and makes sure the logic is bulletproof.
+* Drivers are "dumb", migrate glues everything together and makes sure the logic is bulletproof.
   (Keeps the drivers lightweight, too.)
- * Database drivers don't assume things or try to correct user input. When in doubt, fail.
+* Database drivers don't assume things or try to correct user input. When in doubt, fail.

 Forked from [mattes/migrate](https://github.com/mattes/migrate)

@ -23,21 +23,21 @@ Forked from [mattes/migrate](https://github.com/mattes/migrate)

 Database drivers run migrations. [Add a new database?](database/driver.go)

-  * [PostgreSQL](database/postgres)
-  * [Redshift](database/redshift)
-  * [Ql](database/ql)
-  * [Cassandra](database/cassandra)
-  * [SQLite](database/sqlite3) ([todo #165](https://github.com/mattes/migrate/issues/165))
-  * [MySQL/ MariaDB](database/mysql)
-  * [Neo4j](database/neo4j) ([todo #167](https://github.com/mattes/migrate/issues/167))
-  * [MongoDB](database/mongodb)
-  * [CrateDB](database/crate) ([todo #170](https://github.com/mattes/migrate/issues/170))
-  * [Shell](database/shell) ([todo #171](https://github.com/mattes/migrate/issues/171))
-  * [Google Cloud Spanner](database/spanner)
-  * [CockroachDB](database/cockroachdb)
-  * [ClickHouse](database/clickhouse)
-  * [Firebird](database/firebird) ([todo #49](https://github.com/golang-migrate/migrate/issues/49))
-  * [MS SQL Server](database/sqlserver)
+* [PostgreSQL](database/postgres)
+* [Redshift](database/redshift)
+* [Ql](database/ql)
+* [Cassandra](database/cassandra)
+* [SQLite](database/sqlite3) ([todo #165](https://github.com/mattes/migrate/issues/165))
+* [MySQL/ MariaDB](database/mysql)
+* [Neo4j](database/neo4j) ([todo #167](https://github.com/mattes/migrate/issues/167))
+* [MongoDB](database/mongodb)
+* [CrateDB](database/crate) ([todo #170](https://github.com/mattes/migrate/issues/170))
+* [Shell](database/shell) ([todo #171](https://github.com/mattes/migrate/issues/171))
+* [Google Cloud Spanner](database/spanner)
+* [CockroachDB](database/cockroachdb)
+* [ClickHouse](database/clickhouse)
+* [Firebird](database/firebird) ([todo #49](https://github.com/golang-migrate/migrate/issues/49))
+* [MS SQL Server](database/sqlserver)

 ### Database URLs

@ -49,6 +49,7 @@ Explicitly, the following characters need to be escaped:
 `!`, `#`, `$`, `%`, `&`, `'`, `(`, `)`, `*`, `+`, `,`, `/`, `:`, `;`, `=`, `?`, `@`, `[`, `]`

 It's easiest to always run the URL parts of your DB connection URL (e.g. username, password, etc) through an URL encoder. See the example Python snippets below:
+
 ```bash
 $ python3 -c 'import urllib.parse; print(urllib.parse.quote(input("String to encode: "), ""))'
 String to encode: FAKEpassword!#$%&'()*+,/:;=?@[]
@ -63,44 +64,43 @@ $

 Source drivers read migrations from local or remote sources. [Add a new source?](source/driver.go)

-  * [Filesystem](source/file) - read from fileystem
-  * [Go-Bindata](source/go_bindata) - read from embedded binary data ([jteeuwen/go-bindata](https://github.com/jteeuwen/go-bindata))
-  * [Github](source/github) - read from remote Github repositories
-  * [Gitlab](source/gitlab) - read from remote Gitlab repositories
-  * [AWS S3](source/aws_s3) - read from Amazon Web Services S3
-  * [Google Cloud Storage](source/google_cloud_storage) - read from Google Cloud Platform Storage
-
-
+* [Filesystem](source/file) - read from filesystem
+* [Go-Bindata](source/go_bindata) - read from embedded binary data ([jteeuwen/go-bindata](https://github.com/jteeuwen/go-bindata))
+* [Github](source/github) - read from remote Github repositories
+* [Github Enterprise](source/github_ee) - read from remote Github Enterprise repositories
+* [Gitlab](source/gitlab) - read from remote Gitlab repositories
+* [AWS S3](source/aws_s3) - read from Amazon Web Services S3
+* [Google Cloud Storage](source/google_cloud_storage) - read from Google Cloud Platform Storage

 ## CLI usage

-  * Simple wrapper around this library.
-  * Handles ctrl+c (SIGINT) gracefully.
-  * No config search paths, no config files, no magic ENV var injections.
+* Simple wrapper around this library.
+* Handles ctrl+c (SIGINT) gracefully.
+* No config search paths, no config files, no magic ENV var injections.

-__[CLI Documentation](cli)__
+__[CLI Documentation](cmd/migrate)__

-### Basic usage:
+### Basic usage

-```
+```bash
 $ migrate -source file://path/to/migrations -database postgres://localhost:5432/database up 2
 ```

 ### Docker usage

-```
+```bash
 $ docker run -v {{ migration dir }}:/migrations --network host migrate/migrate
    -path=/migrations/ -database postgres://localhost:5432/database up 2
 ```

 ## Use in your Go project

- * API is stable and frozen for this release (v3 & v4).
- * Uses [Go modules](https://golang.org/cmd/go/#hdr-Modules__module_versions__and_more) to manage dependencies.
- * To help prevent database corruptions, it supports graceful stops via `GracefulStop chan bool`.
- * Bring your own logger.
- * Uses `io.Reader` streams internally for low memory overhead.
- * Thread-safe and no goroutine leaks.
+* API is stable and frozen for this release (v3 & v4).
+* Uses [Go modules](https://golang.org/cmd/go/#hdr-Modules__module_versions__and_more) to manage dependencies.
+* To help prevent database corruptions, it supports graceful stops via `GracefulStop chan bool`.
+* Bring your own logger.
+* Uses `io.Reader` streams internally for low memory overhead.
+* Thread-safe and no goroutine leaks.

 __[Go Documentation](https://godoc.org/github.com/golang-migrate/migrate)__

@ -140,11 +140,21 @@ func main() {
 }
 ```

+## Getting started
+
+Go to [getting started](GETTING_STARTED.md)
+
+## Tutorials
+
+- [PostgreSQL](database/postgres/TUTORIAL.md)
+
+(more tutorials to come)
+
 ## Migration files

 Each migration has an up and down migration. [Why?](FAQ.md#why-two-separate-files-up-and-down-for-a-migration)

-```
+```bash
 1481574547_create_users_table.up.sql
 1481574547_create_users_table.down.sql
 ```
@ -166,8 +176,6 @@ read the [development guide](CONTRIBUTING.md).

 Also have a look at the [FAQ](FAQ.md).

-
-
 ---

 Looking for alternatives? [https://awesome-go.com/#database](https://awesome-go.com/#database).
--- a/vendor/github.com/status-im/migrate/v4/database/postgres/TUTORIAL.md
+++ b/vendor/github.com/status-im/migrate/v4/database/postgres/TUTORIAL.md
@ -0,0 +1,148 @@
+# PostgreSQL tutorial for beginners
+
+## Create/configure database
+
+For the purpose of this tutorial let's create PostgreSQL database called `example`.
+Our user here is `postgres`, password `password`, and host is `localhost`.
+```
+psql -h localhost -U postgres -w -c "create database example;"
+```
+When using Migrate CLI we need to pass to database URL. Let's export it to a variable for convienience:
+```
+export POSTGRESQL_URL=postgres://postgres:password@localhost:5432/example?sslmode=disable
+```
+`sslmode=disable` means that the connection with our database will not be encrypted. Enabling it is left as an exercise.
+
+You can find further description of database URLs [here](README.md#database-urls).
+
+## Create migrations
+Let's create table called `users`:
+```
+migrate create -ext sql -dir db/migrations -seq create_users_table
+```
+If there were no errors, we should have two files available under `db/migrations` folder:
+- 000001_create_users_table.down.sql
+- 000001_create_users_table.up.sql
+
+Note the `sql` extension that we provided.
+
+In the `.up.sql` file let's create the table:
+```
+CREATE TABLE IF NOT EXISTS users(
+   user_id serial PRIMARY KEY,
+   username VARCHAR (50) UNIQUE NOT NULL,
+   password VARCHAR (50) NOT NULL,
+   email VARCHAR (300) UNIQUE NOT NULL
+);
+```
+And in the `.down.sql` let's delete it:
+```
+DROP TABLE IF EXISTS users;
+```
+By adding `IF EXISTS/IF NOT EXISTS` we are making migrations idempotent - you can read more about idempotency in [getting started](GETTING_STARTED.md#create-migrations)
+
+## Run migrations
+```
+migrate -database ${POSTGRESQL_URL} -path db/migrations up
+```
+Let's check if the table was created properly by running `psql example -c "\d users"`.
+The output you are supposed to see:
+```
+                                    Table "public.users"
+  Column  |          Type          |                        Modifiers                        
+----------+------------------------+---------------------------------------------------------
+ user_id  | integer                | not null default nextval('users_user_id_seq'::regclass)
+ username | character varying(50)  | not null
+ password | character varying(50)  | not null
+ email    | character varying(300) | not null
+Indexes:
+    "users_pkey" PRIMARY KEY, btree (user_id)
+    "users_email_key" UNIQUE CONSTRAINT, btree (email)
+    "users_username_key" UNIQUE CONSTRAINT, btree (username)
+```
+Great! Now let's check if running reverse migration also works:
+```
+migrate -database ${POSTGRESQL_URL} -path db/migrations down
+```
+Make sure to check if your database changed as expected in this case as well.
+
+## Database transactions
+
+To show database transactions usage, let's create another set of migrations by running:
+```
+migrate create -ext sql -dir db/migrations -seq add_mood_to_users
+```
+Again, it should create for us two migrations files:
+- 000002_add_mood_to_users.down.sql
+- 000002_add_mood_to_users.up.sql
+
+In Postgres, when we want our queries to be done in a transaction, we need to wrap it with `BEGIN` and `COMMIT` commands.
+In our example, we are going to add a column to our database that can only accept enumerable values or NULL.
+Migration up:
+```
+BEGIN;
+
+CREATE TYPE enum_mood AS ENUM (
+	'happy',
+	'sad',
+	'neutral'
+);
+ALTER TABLE users ADD COLUMN mood enum_mood;
+
+COMMIT;
+```
+Migration down:
+```
+BEGIN;
+
+ALTER TABLE users DROP COLUMN mood;
+DROP TYPE enum_mood;
+
+COMMIT;
+```
+
+Now we can run our new migration and check the database:
+```
+migrate -database ${POSTGRESQL_URL} -path db/migrations up
+psql example -c "\d users"
+```
+Expected output:
+```
+                                    Table "public.users"
+  Column  |          Type          |                        Modifiers                        
+----------+------------------------+---------------------------------------------------------
+ user_id  | integer                | not null default nextval('users_user_id_seq'::regclass)
+ username | character varying(50)  | not null
+ password | character varying(50)  | not null
+ email    | character varying(300) | not null
+ mood     | enum_mood              | 
+Indexes:
+    "users_pkey" PRIMARY KEY, btree (user_id)
+    "users_email_key" UNIQUE CONSTRAINT, btree (email)
+    "users_username_key" UNIQUE CONSTRAINT, btree (username)
+```
+
+## Optional: Run migrations within your Go app
+Here is a very simple app running migrations for the above configuration:
+```
+import (
+	"log"
+
+	"github.com/golang-migrate/migrate/v4"
+	_ "github.com/golang-migrate/migrate/v4/database/postgres"
+	_ "github.com/golang-migrate/migrate/v4/source/file"
+)
+
+func main() {
+	m, err := migrate.New(
+		"file://db/migrations",
+		"postgres://postgres:postgres@localhost:5432/example?sslmode=disable")
+	if err != nil {
+		log.Fatal(err)
+	}
+	if err := m.Up(); err != nil {
+		log.Fatal(err)
+	}
+}
+```
+You can find details [here](README.md#use-in-your-go-project)
--- a/vendor/github.com/status-im/migrate/v4/database/postgres/postgres.go
+++ b/vendor/github.com/status-im/migrate/v4/database/postgres/postgres.go
@ -150,8 +150,7 @@ func (p *Postgres) Lock() error {
 		return err
 	}

-	// This will either obtain the lock immediately and return true,
-	// or return false if the lock cannot be acquired immediately.
+	// This will wait indefinitely until the lock can be acquired.
 	query := `SELECT pg_advisory_lock($1)`
 	if _, err := p.conn.ExecContext(context.Background(), query, aid); err != nil {
 		return &database.Error{OrigErr: err, Err: "try lock failed", Query: []byte(query)}
--- a/vendor/github.com/status-im/migrate/v4/go.mod
+++ b/vendor/github.com/status-im/migrate/v4/go.mod
@ -7,10 +7,11 @@ require (
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
 	github.com/cockroachdb/apd v1.1.0 // indirect
 	github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c
+	github.com/containerd/containerd v1.2.7 // indirect
 	github.com/cznic/ql v1.2.0
 	github.com/denisenkom/go-mssqldb v0.0.0-20190515213511-eb9f6a1743f3
 	github.com/dhui/dktest v0.3.0
-	github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf
+	github.com/docker/docker v0.7.3-0.20190817195342-4760db040282
 	github.com/fsouza/fake-gcs-server v1.7.0
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/gocql/gocql v0.0.0-20190301043612-f6df8288f9b4
@ -28,7 +29,7 @@ require (
 	github.com/kshvakov/clickhouse v1.3.5
 	github.com/lib/pq v1.0.0
 	github.com/mattn/go-sqlite3 v1.10.0
-	github.com/mongodb/mongo-go-driver v0.3.0
+	github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c // indirect
 	github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/satori/go.uuid v1.2.0 // indirect
@ -40,6 +41,7 @@ require (
 	github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c // indirect
 	github.com/xdg/stringprep v1.0.0 // indirect
 	gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b // indirect
+	go.mongodb.org/mongo-driver v1.1.0
 	golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734 // indirect
 	golang.org/x/net v0.0.0-20190424112056-4829fb13d2c6
 	golang.org/x/oauth2 v0.0.0-20190402181905-9f3314589c9a // indirect
@ -52,3 +54,5 @@ require (
 	google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb
 	google.golang.org/grpc v1.20.1 // indirect
 )
+
+go 1.12
--- a/vendor/github.com/status-im/migrate/v4/go.sum
+++ b/vendor/github.com/status-im/migrate/v4/go.sum
@ -26,6 +26,8 @@ github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I
 github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
 github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c h1:2zRrJWIt/f9c9HhNHAgrRgq0San5gRRUJTBXLkchal0=
 github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c/go.mod h1:XGLbWH/ujMcbPbhZq52Nv6UrCghb1yGn//133kEsvDk=
+github.com/containerd/containerd v1.2.7 h1:8lqLbl7u1j3MmiL9cJ/O275crSq7bfwUayvvatEupQk=
+github.com/containerd/containerd v1.2.7/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/cznic/b v0.0.0-20180115125044-35e9bbe41f07 h1:UHFGPvSxX4C4YBApSPvmUfL8tTvWLj2ryqvT9K4Jcuk=
 github.com/cznic/b v0.0.0-20180115125044-35e9bbe41f07/go.mod h1:URriBxXwVq5ijiJ12C7iIZqlA69nTlI+LgI6/pwftG8=
 github.com/cznic/fileutil v0.0.0-20180108211300-6a051e75936f h1:7uSNgsgcarNk4oiN/nNkO0J7KAjlsF5Yv5Gf/tFdHas=
@ -56,8 +58,8 @@ github.com/dhui/dktest v0.3.0/go.mod h1:cyzIUfGsBEbZ6BT7tnXqAShHSXCZhSNmFl70sZ7c
 github.com/docker/distribution v2.7.0+incompatible h1:neUDAlf3wX6Ml4HdqTrbcOHXtfRN0TFIwt6YFL7N9RU=
 github.com/docker/distribution v2.7.0+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.7.3-0.20190103212154-2b7e084dc98b/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf h1:2v/98rHzs3v6X0AHtoCH9u+e56SdnpogB1Z2fFe1KqQ=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282 h1:mzrx39dGtGq0VEnTHjnakmczd4uFbhx2cZU3BJDsLdc=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
@ -147,8 +149,8 @@ github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
 github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
-github.com/mongodb/mongo-go-driver v0.3.0 h1:00tKWMrabkVU1e57/TTP4ZBIfhn/wmjlSiRnIM9d0T8=
-github.com/mongodb/mongo-go-driver v0.3.0/go.mod h1:NK/HWDIIZkaYsnYa0hmtP443T5ELr0KDecmIioVuuyU=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c h1:nXxl5PrvVm2L/wCy8dQu6DMTwH4oIuGN8GJDAlqDdVE=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8 h1:P48LjvUQpTReR3TQRbxSeSBsMXzfK0uol7eRcr7VBYQ=
 github.com/nakagami/firebirdsql v0.0.0-20190310045651-3c02a58cfed8/go.mod h1:86wM1zFnC6/uDBfZGNwB65O+pR2OFi5q/YQaEUid1qA=
@ -196,6 +198,8 @@ github.com/xdg/stringprep v1.0.0 h1:d9X0esnoa3dFsV0FG35rAT0RIhYFlPq7MiP+DW89La0=
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b h1:7gd+rd8P3bqcn/96gOZa3F5dpJr/vEiDQYlNb/y2uNs=
 gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b/go.mod h1:T3BPAOm2cqquPa0MKWeNkmOM5RQsRhkrwMWonFMN7fE=
+go.mongodb.org/mongo-driver v1.1.0 h1:aeOqSrhl9eDRAap/3T5pCfMBEBxZ0vuXBP+RMtp2KX8=
+go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.opencensus.io v0.20.1 h1:pMEjRZ1M4ebWGikflH7nQpV6+Zr88KBMA2XJD3sbijw=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0 h1:mU6zScU4U1YAFPHEHYk+3JC4SY7JxgkqS10ZOSyksNg=
--- a/vendor/github.com/status-im/migrate/v4/internal/url/url.go
+++ b/vendor/github.com/status-im/migrate/v4/internal/url/url.go
@ -0,0 +1,25 @@
+package url
+
+import (
+	"errors"
+	"strings"
+)
+
+var errNoScheme = errors.New("no scheme")
+var errEmptyURL = errors.New("URL cannot be empty")
+
+// schemeFromURL returns the scheme from a URL string
+func SchemeFromURL(url string) (string, error) {
+	if url == "" {
+		return "", errEmptyURL
+	}
+
+	i := strings.Index(url, ":")
+
+	// No : or : is the first character.
+	if i < 1 {
+		return "", errNoScheme
+	}
+
+	return url[0:i], nil
+}
--- a/vendor/github.com/status-im/migrate/v4/migrate.go
+++ b/vendor/github.com/status-im/migrate/v4/migrate.go
@ -7,12 +7,14 @@ package migrate
 import (
 	"errors"
 	"fmt"
-	"github.com/hashicorp/go-multierror"
 	"os"
 	"sync"
 	"time"

+	"github.com/hashicorp/go-multierror"
+
 	"github.com/golang-migrate/migrate/v4/database"
+	iurl "github.com/status-im/migrate/v4/internal/url"
 	"github.com/golang-migrate/migrate/v4/source"
 )

@ -85,13 +87,13 @@ type Migrate struct {
 func New(sourceURL, databaseURL string) (*Migrate, error) {
 	m := newCommon()

-	sourceName, err := sourceSchemeFromURL(sourceURL)
+	sourceName, err := iurl.SchemeFromURL(sourceURL)
 	if err != nil {
 		return nil, err
 	}
 	m.sourceName = sourceName

-	databaseName, err := databaseSchemeFromURL(databaseURL)
+	databaseName, err := iurl.SchemeFromURL(databaseURL)
 	if err != nil {
 		return nil, err
 	}
@ -119,7 +121,7 @@ func New(sourceURL, databaseURL string) (*Migrate, error) {
 func NewWithDatabaseInstance(sourceURL string, databaseName string, databaseInstance database.Driver) (*Migrate, error) {
 	m := newCommon()

-	sourceName, err := schemeFromURL(sourceURL)
+	sourceName, err := iurl.SchemeFromURL(sourceURL)
 	if err != nil {
 		return nil, err
 	}
@ -145,7 +147,7 @@ func NewWithDatabaseInstance(sourceURL string, databaseName string, databaseInst
 func NewWithSourceInstance(sourceName string, sourceInstance source.Driver, databaseURL string) (*Migrate, error) {
 	m := newCommon()

-	databaseName, err := schemeFromURL(databaseURL)
+	databaseName, err := iurl.SchemeFromURL(databaseURL)
 	if err != nil {
 		return nil, err
 	}
@ -804,6 +806,7 @@ func (m *Migrate) versionExists(version uint) (result error) {
 		return err
 	}

+	m.logErr(fmt.Errorf("no migration found for version %d", version))
 	return os.ErrNotExist
 }

@ -950,7 +953,7 @@ func (m *Migrate) unlock() error {
 // if a prevErr is not nil.
 func (m *Migrate) unlockErr(prevErr error) error {
 	if err := m.unlock(); err != nil {
-		return NewMultiError(prevErr, err)
+		return multierror.Append(prevErr, err)
 	}
 	return prevErr
 }
--- a/vendor/github.com/status-im/migrate/v4/util.go
+++ b/vendor/github.com/status-im/migrate/v4/util.go
@ -1,18 +1,22 @@
 package migrate

 import (
-	"errors"
 	"fmt"
 	nurl "net/url"
 	"strings"
 )

 // MultiError holds multiple errors.
+//
+// Deprecated: Use github.com/hashicorp/go-multierror instead
 type MultiError struct {
 	Errs []error
 }

 // NewMultiError returns an error type holding multiple errors.
+//
+// Deprecated: Use github.com/hashicorp/go-multierror instead
+//
 func NewMultiError(errs ...error) MultiError {
 	compactErrs := make([]error, 0)
 	for _, e := range errs {
@ -44,42 +48,6 @@ func suint(n int) uint {
 	return uint(n)
 }

-var errNoScheme = errors.New("no scheme")
-var errEmptyURL = errors.New("URL cannot be empty")
-
-func sourceSchemeFromURL(url string) (string, error) {
-	u, err := schemeFromURL(url)
-	if err != nil {
-		return "", fmt.Errorf("source: %v", err)
-	}
-	return u, nil
-}
-
-func databaseSchemeFromURL(url string) (string, error) {
-	u, err := schemeFromURL(url)
-	if err != nil {
-		return "", fmt.Errorf("database: %v", err)
-	}
-	return u, nil
-}
-
-// schemeFromURL returns the scheme from a URL string
-func schemeFromURL(url string) (string, error) {
-	if url == "" {
-		return "", errEmptyURL
-	}
-
-	u, err := nurl.Parse(url)
-	if err != nil {
-		return "", err
-	}
-	if len(u.Scheme) == 0 {
-		return "", errNoScheme
-	}
-
-	return u.Scheme, nil
-}
-
 // FilterCustomQuery filters all query values starting with `x-`
 func FilterCustomQuery(u *nurl.URL) *nurl.URL {
 	ux := *u
--- a/vendor/github.com/status-im/status-protocol-go/chat.go
+++ b/vendor/github.com/status-im/status-protocol-go/chat.go
@ -2,10 +2,13 @@ package statusproto

 import (
 	"crypto/ecdsa"
+	"crypto/sha1"
+	"encoding/hex"

+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/google/uuid"
 	statusproto "github.com/status-im/status-protocol-go/types"
+	protocol "github.com/status-im/status-protocol-go/v1"
 )

 type ChatType int
@ -52,6 +55,55 @@ type Chat struct {
 	MembershipUpdates []ChatMembershipUpdate `json:"membershipUpdates"`
 }

+func (c *Chat) MembersAsPublicKeys() ([]*ecdsa.PublicKey, error) {
+	publicKeys := make([]string, len(c.Members))
+	for idx, item := range c.Members {
+		publicKeys[idx] = item.ID
+	}
+	return stringSliceToPublicKeys(publicKeys, true)
+}
+
+func (c *Chat) updateChatFromProtocolGroup(g *protocol.Group) {
+	// ID
+	c.ID = g.ChatID()
+
+	// Name
+	c.Name = g.Name()
+
+	// Members
+	members := g.Members()
+	admins := g.Admins()
+	joined := g.Joined()
+	chatMembers := make([]ChatMember, 0, len(members))
+	for _, m := range members {
+		chatMember := ChatMember{
+			ID: m,
+		}
+		chatMember.Admin = stringSliceContains(admins, m)
+		chatMember.Joined = stringSliceContains(joined, m)
+		chatMembers = append(chatMembers, chatMember)
+	}
+	c.Members = chatMembers
+
+	// MembershipUpdates
+	updates := g.Updates()
+	membershipUpdates := make([]ChatMembershipUpdate, 0, len(updates))
+	for _, update := range updates {
+		membershipUpdate := ChatMembershipUpdate{
+			Type:       update.Type,
+			Name:       update.Name,
+			ClockValue: uint64(update.ClockValue), // TODO: get rid of type casting
+			Signature:  update.Signature,
+			From:       update.From,
+			Member:     update.Member,
+			Members:    update.Members,
+		}
+		membershipUpdate.setID()
+		membershipUpdates = append(membershipUpdates, membershipUpdate)
+	}
+	c.MembershipUpdates = membershipUpdates
+}
+
 // ChatMembershipUpdate represent an event on membership of the chat
 type ChatMembershipUpdate struct {
 	// Unique identifier for the event
@ -72,6 +124,11 @@ type ChatMembershipUpdate struct {
 	Members []string `json:"members,omitempty"`
 }

+func (u *ChatMembershipUpdate) setID() {
+	sum := sha1.Sum([]byte(u.Signature))
+	u.ID = hex.EncodeToString(sum[:])
+}
+
 // ChatMember represents a member who participates in a group chat
 type ChatMember struct {
 	// ID is the hex encoded public key of the member
@ -113,14 +170,8 @@ func CreatePublicChat(name string) Chat {
 	}
 }

-func groupChatID(creator *ecdsa.PublicKey) string {
-	return uuid.New().String() + statusproto.EncodeHex(crypto.FromECDSAPub(creator))
-}
-
-func CreateGroupChat(name string, creator *ecdsa.PublicKey) Chat {
+func createGroupChat() Chat {
 	return Chat{
-		ID:       groupChatID(creator),
-		Name:     name,
 		Active:   true,
 		ChatType: ChatTypePrivateGroupChat,
 	}
@ -134,3 +185,35 @@ func findChatByID(chatID string, chats []*Chat) *Chat {
 	}
 	return nil
 }
+
+func stringSliceToPublicKeys(slice []string, prefixed bool) ([]*ecdsa.PublicKey, error) {
+	result := make([]*ecdsa.PublicKey, len(slice))
+	for idx, item := range slice {
+		var (
+			b   []byte
+			err error
+		)
+		if prefixed {
+			b, err = hexutil.Decode(item)
+		} else {
+			b, err = hex.DecodeString(item)
+		}
+		if err != nil {
+			return nil, err
+		}
+		result[idx], err = crypto.UnmarshalPubkey(b)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return result, nil
+}
+
+func stringSliceContains(slice []string, item string) bool {
+	for _, s := range slice {
+		if s == item {
+			return true
+		}
+	}
+	return false
+}
--- a/vendor/github.com/status-im/status-protocol-go/chat_group_proxy.go
+++ b/vendor/github.com/status-im/status-protocol-go/chat_group_proxy.go
@ -0,0 +1,28 @@
+package statusproto
+
+import (
+	protocol "github.com/status-im/status-protocol-go/v1"
+)
+
+func newProtocolGroupFromChat(chat *Chat) (*protocol.Group, error) {
+	return protocol.NewGroup(chat.ID, chatToFlattenMembershipUpdate(chat))
+}
+
+func chatToFlattenMembershipUpdate(chat *Chat) []protocol.MembershipUpdateFlat {
+	result := make([]protocol.MembershipUpdateFlat, len(chat.MembershipUpdates))
+	for idx, update := range chat.MembershipUpdates {
+		result[idx] = protocol.MembershipUpdateFlat{
+			ChatID:    chat.ID,
+			From:      update.From,
+			Signature: update.Signature,
+			MembershipUpdateEvent: protocol.MembershipUpdateEvent{
+				Name:       update.Name,
+				Type:       update.Type,
+				ClockValue: int64(update.ClockValue), // TODO: remove type difference
+				Member:     update.Member,
+				Members:    update.Members,
+			},
+		}
+	}
+	return result
+}
--- a/vendor/github.com/status-im/status-protocol-go/crypto/crypto.go
+++ b/vendor/github.com/status-im/status-protocol-go/crypto/crypto.go
@ -78,6 +78,7 @@ func VerifySignatures(signaturePairs [][3]string) error {
 }

 // ExtractSignatures extract from tuples of signatures content a public key
+// DEPRECATED: use ExtractSignature
 func ExtractSignatures(signaturePairs [][2]string) ([]string, error) {
 	response := make([]string, len(signaturePairs))
 	for i, signaturePair := range signaturePairs {
@ -102,6 +103,12 @@ func ExtractSignatures(signaturePairs [][2]string) ([]string, error) {
 	return response, nil
 }

+// ExtractSignature returns a public key for a given data and signature.
+func ExtractSignature(data, signature []byte) (*ecdsa.PublicKey, error) {
+	dataHash := crypto.Keccak256(data)
+	return crypto.SigToPub(dataHash, signature)
+}
+
 func EncryptSymmetric(key, plaintext []byte) ([]byte, error) {
 	block, err := aes.NewCipher(key)
 	if err != nil {
--- a/vendor/github.com/status-im/status-protocol-go/go.mod
+++ b/vendor/github.com/status-im/status-protocol-go/go.mod
@ -16,10 +16,10 @@ require (
 	github.com/russolsen/same v0.0.0-20160222130632-f089df61f51d // indirect
 	github.com/russolsen/transit v0.0.0-20180705123435-0794b4c4505a
 	github.com/status-im/doubleratchet v2.0.0+incompatible
-	github.com/status-im/migrate/v4 v4.0.0-20190821140204-a9d340ec8fb76af4afda06acf01740d45d2661ed
+	github.com/status-im/migrate/v4 v4.6.2-status.2
 	github.com/status-im/whisper v1.5.1
 	github.com/stretchr/testify v1.3.1-0.20190712000136-221dbe5ed467
-	github.com/vacp2p/mvds v0.0.21
+	github.com/vacp2p/mvds v0.0.23-0.20191014101555-026e462c829d
 	go.uber.org/zap v1.10.0
 	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
 	golang.org/x/net v0.0.0-20190628185345-da137c7871d7 // indirect
--- a/vendor/github.com/status-im/status-protocol-go/go.sum
+++ b/vendor/github.com/status-im/status-protocol-go/go.sum
@ -44,6 +44,7 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
 github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
 github.com/cockroachdb/cockroach-go v0.0.0-20181001143604-e0a95dfd547c/go.mod h1:XGLbWH/ujMcbPbhZq52Nv6UrCghb1yGn//133kEsvDk=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
+github.com/containerd/containerd v1.2.7/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/cznic/b v0.0.0-20180115125044-35e9bbe41f07/go.mod h1:URriBxXwVq5ijiJ12C7iIZqlA69nTlI+LgI6/pwftG8=
 github.com/cznic/fileutil v0.0.0-20180108211300-6a051e75936f/go.mod h1:8S58EK26zhXSxzv7NQFpnliaOQsmDUxvoQO3rt154Vg=
 github.com/cznic/golex v0.0.0-20170803123110-4ab7c5e190e4/go.mod h1:+bmmJDNmKlhWNG+gwWCkaBoTy39Fs+bzRxVBzoTQbIc=
@ -68,8 +69,7 @@ github.com/docker/distribution v2.7.0+incompatible h1:neUDAlf3wX6Ml4HdqTrbcOHXtf
 github.com/docker/distribution v2.7.0+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.0.0-20180625184442-8e610b2b55bf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/docker v0.7.3-0.20190103212154-2b7e084dc98b/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf h1:2v/98rHzs3v6X0AHtoCH9u+e56SdnpogB1Z2fFe1KqQ=
-github.com/docker/docker v0.7.3-0.20190108045446-77df18c24acf/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v0.7.3-0.20190817195342-4760db040282/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
@ -100,10 +100,8 @@ github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
 github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
-github.com/golang-migrate/migrate v3.5.4+incompatible h1:R7OzwvCJTCgwapPCiX6DyBiu2czIUMDCB118gFTKTUA=
-github.com/golang-migrate/migrate v3.5.4+incompatible/go.mod h1:IsVUlFN5puWOmXrqjgGUfIRIbU7mr8oNBE2tyERd9Wk=
-github.com/golang-migrate/migrate/v4 v4.5.0 h1:ucd2qJu1BAKTtmjh7QlWYiq01DwlE/xXYQkOPE0ZTsI=
-github.com/golang-migrate/migrate/v4 v4.5.0/go.mod h1:SzAcz2l+yDJVhQC7fwiF7T2MAFPMIkigJz98klRJ4OE=
+github.com/golang-migrate/migrate/v4 v4.6.2 h1:LDDOHo/q1W5UDj6PbkxdCv7lv9yunyZHXvxuwDkGo3k=
+github.com/golang-migrate/migrate/v4 v4.6.2/go.mod h1:JYi6reN3+Z734VZ0akNuyOJNcrg45ZL7LDBMW3WGJL0=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
@ -189,7 +187,7 @@ github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0j
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7/go.mod h1:ZXFpozHsX6DPmq2I0TCekCxypsnAUbP2oI0UX1GXzOo=
 github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
-github.com/mongodb/mongo-go-driver v0.3.0/go.mod h1:NK/HWDIIZkaYsnYa0hmtP443T5ELr0KDecmIioVuuyU=
+github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/mutecomm/go-sqlcipher v0.0.0-20190227152316-55dbde17881f h1:hd3r+uv9DNLScbOrnlj82rBldHQf3XWmCeXAWbw8euQ=
 github.com/mutecomm/go-sqlcipher v0.0.0-20190227152316-55dbde17881f/go.mod h1:MyUWrZlB1aI5bs7j9/pJ8ckLLZ4QcCYcNiSbsAW32D4=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
@ -255,8 +253,8 @@ github.com/status-im/doubleratchet v2.0.0+incompatible h1:s77lF1lDubK0RKftxN2vH8
 github.com/status-im/doubleratchet v2.0.0+incompatible/go.mod h1:1sqR0+yhiM/bd+wrdX79AOt2csZuJOni0nUDzKNuqOU=
 github.com/status-im/go-ethereum v1.9.5-status.4 h1:F5VrxH9LmTxWl4qwQjs0TI5TgG9dVuZKqGmdwHJ0cWk=
 github.com/status-im/go-ethereum v1.9.5-status.4/go.mod h1:Ulij8LMpMvXnbnPcmDqrpI+iXoXSjxItuY/wmbasTZU=
-github.com/status-im/migrate/v4 v4.0.0-20190821140204-a9d340ec8fb76af4afda06acf01740d45d2661ed h1:K2iga8l8OQIHnk2bBq2QsZTO2Q38YWy04xIspdITCdM=
-github.com/status-im/migrate/v4 v4.0.0-20190821140204-a9d340ec8fb76af4afda06acf01740d45d2661ed/go.mod h1:r8HggRBZ/k7TRwByq/Hp3P/ubFppIna0nvyavVK0pjA=
+github.com/status-im/migrate/v4 v4.6.2-status.2 h1:SdC+sMDl/aI7vUlwD2qj2p7KsK4T60IS9z4/rYCCbI8=
+github.com/status-im/migrate/v4 v4.6.2-status.2/go.mod h1:c/kc90n47GZu/58nnz1OMLTf7uE4Da4gZP5qmU+A/v8=
 github.com/status-im/whisper v1.5.1 h1:87/XIg0Wjua7lXBGiEXgAfTOqlt2Q1dMDuxugTyZbbA=
 github.com/status-im/whisper v1.5.1/go.mod h1:emrOxzJme0k66QtbbQ2bdd3P8RCdLZ8sTD7SkwH1s2s=
 github.com/steakknife/bloomfilter v0.0.0-20180922174646-6819c0d2a570/go.mod h1:8OR4w3TdeIHIh1g6EMY5p0gVNOovcWC+1vpc7naMuAw=
@ -276,12 +274,13 @@ github.com/syndtr/goleveldb v0.0.0-20181128100959-b001fa50d6b2/go.mod h1:Z4AUp2K
 github.com/tidwall/pretty v0.0.0-20180105212114-65a9db5fad51/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
 github.com/uber/jaeger-client-go v0.0.0-20180607151842-f7e0d4744fa6/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
 github.com/uber/jaeger-lib v0.0.0-20180615202729-a51202d6f4a7/go.mod h1:ComeNDZlWwrWnDv8aPp0Ba6+uUTzImX/AauajbLI56U=
-github.com/vacp2p/mvds v0.0.21 h1:YeYja8noKsHvrnOHM4pqjBvDwwy+kUzXMkX1IBYJAbU=
-github.com/vacp2p/mvds v0.0.21/go.mod h1:pIqr2Hg4cIkTJniGPCp4ptong2jxgxx6uToVoY94+II=
+github.com/vacp2p/mvds v0.0.23-0.20191014101555-026e462c829d h1:kc/9/ZbwyqIKQ2phzmPpBYGx7v2olwD2P7Uj8KKd+Bw=
+github.com/vacp2p/mvds v0.0.23-0.20191014101555-026e462c829d/go.mod h1:uUmtiahU7efOVl/5w5yk9jOze5xYpDZDrSrT8TvHXjQ=
 github.com/xanzy/go-gitlab v0.15.0/go.mod h1:8zdQa/ri1dfn8eS3Ir1SyfvOKlw7WBJ8DVThkpGiXrs=
 github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhemzwFU4jHLhdvlE6uDZjXFejJXr49I=
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 gitlab.com/nyarla/go-crypt v0.0.0-20160106005555-d9a5dc2b789b/go.mod h1:T3BPAOm2cqquPa0MKWeNkmOM5RQsRhkrwMWonFMN7fE=
+go.mongodb.org/mongo-driver v1.1.0/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.uber.org/atomic v1.4.0 h1:cxzIVoETapQEqDhQu3QfnvXAV4AlzcvUCxkVUFw3+EU=
--- a/vendor/github.com/status-im/status-protocol-go/message_handler.go
+++ b/vendor/github.com/status-im/status-protocol-go/message_handler.go
@ -0,0 +1,68 @@
+package statusproto
+
+import (
+	"github.com/pkg/errors"
+
+	protocol "github.com/status-im/status-protocol-go/v1"
+)
+
+type persistentMessageHandler struct {
+	persistence *sqlitePersistence
+}
+
+func newPersistentMessageHandler(persistence *sqlitePersistence) *persistentMessageHandler {
+	return &persistentMessageHandler{persistence: persistence}
+}
+
+// HandleMembershipUpdate updates a Chat instance according to the membership updates.
+// It retrieves chat, if exists, and merges membership updates from the message.
+// Finally, the Chat is updated with the new group events.
+func (h *persistentMessageHandler) HandleMembershipUpdate(m protocol.MembershipUpdateMessage) error {
+	chat, err := h.chatID(m.ChatID)
+	switch err {
+	case errChatNotFound:
+		group, err := protocol.NewGroupWithMembershipUpdates(m.ChatID, m.Updates)
+		if err != nil {
+			return err
+		}
+		newChat := createGroupChat()
+		newChat.updateChatFromProtocolGroup(group)
+		chat = &newChat
+	case nil:
+		existingGroup, err := newProtocolGroupFromChat(chat)
+		if err != nil {
+			return errors.Wrap(err, "failed to create a Group from Chat")
+		}
+		updateGroup, err := protocol.NewGroupWithMembershipUpdates(m.ChatID, m.Updates)
+		if err != nil {
+			return errors.Wrap(err, "invalid membership update")
+		}
+		merged := protocol.MergeFlatMembershipUpdates(existingGroup.Updates(), updateGroup.Updates())
+		newGroup, err := protocol.NewGroup(chat.ID, merged)
+		if err != nil {
+			return errors.Wrap(err, "failed to create a group with new membership updates")
+		}
+		chat.updateChatFromProtocolGroup(newGroup)
+	default:
+		return err
+	}
+	return h.persistence.SaveChat(*chat)
+}
+
+func (h *persistentMessageHandler) chatID(chatID string) (*Chat, error) {
+	var chat *Chat
+	chats, err := h.persistence.Chats()
+	if err != nil {
+		return nil, err
+	}
+	for _, ch := range chats {
+		if chat.ID == chatID {
+			chat = ch
+			break
+		}
+	}
+	if chat == nil {
+		return nil, errChatNotFound
+	}
+	return chat, nil
+}
--- a/vendor/github.com/status-im/status-protocol-go/message_processor.go
+++ b/vendor/github.com/status-im/status-protocol-go/message_processor.go
@ -28,11 +28,16 @@ const (
 	whisperPoWTime = 5
 )

+type messageHandler interface {
+	HandleMembershipUpdate(m protocol.MembershipUpdateMessage) error
+}
+
 type messageProcessor struct {
 	identity  *ecdsa.PrivateKey
 	datasync  *datasync.DataSync
 	protocol  *encryption.Protocol
 	transport *transport.WhisperServiceTransport
+	handler   messageHandler
 	logger    *zap.Logger

 	featureFlags featureFlags
@ -43,6 +48,7 @@ func newMessageProcessor(
 	database *sql.DB,
 	enc *encryption.Protocol,
 	transport *transport.WhisperServiceTransport,
+	handler messageHandler,
 	logger *zap.Logger,
 	features featureFlags,
 ) (*messageProcessor, error) {
@ -65,6 +71,7 @@ func newMessageProcessor(
 		datasync:     ds,
 		protocol:     enc,
 		transport:    transport,
+		handler:      handler,
 		logger:       logger,
 		featureFlags: features,
 	}
@ -87,14 +94,14 @@ func (p *messageProcessor) Stop() {

 func (p *messageProcessor) SendPrivate(
 	ctx context.Context,
-	publicKey *ecdsa.PublicKey,
+	recipient *ecdsa.PublicKey,
 	chatID string,
 	data []byte,
 	clock int64,
 ) ([]byte, *protocol.Message, error) {
 	p.logger.Debug(
 		"sending a private message",
-		zap.Binary("public-key", crypto.FromECDSAPub(publicKey)),
+		zap.Binary("public-key", crypto.FromECDSAPub(recipient)),
 	)

 	message := protocol.CreatePrivateTextMessage(data, clock, chatID)
@ -103,7 +110,7 @@ func (p *messageProcessor) SendPrivate(
 		return nil, nil, errors.Wrap(err, "failed to encode message")
 	}

-	messageID, err := p.sendPrivate(ctx, publicKey, encodedMessage)
+	messageID, err := p.sendPrivate(ctx, recipient, encodedMessage)
 	if err != nil {
 		return nil, nil, err
 	}
@ -113,23 +120,25 @@ func (p *messageProcessor) SendPrivate(
 // SendPrivateRaw takes encoded data, encrypts it and sends through the wire.
 func (p *messageProcessor) SendPrivateRaw(
 	ctx context.Context,
-	publicKey *ecdsa.PublicKey,
+	recipient *ecdsa.PublicKey,
 	data []byte,
 ) ([]byte, error) {
 	p.logger.Debug(
 		"sending a private message",
-		zap.Binary("public-key", crypto.FromECDSAPub(publicKey)),
+		zap.Binary("public-key", crypto.FromECDSAPub(recipient)),
 		zap.String("site", "SendPrivateRaw"),
 	)
-	return p.sendPrivate(ctx, publicKey, data)
+	return p.sendPrivate(ctx, recipient, data)
 }

 // sendPrivate sends data to the recipient identifying with a given public key.
 func (p *messageProcessor) sendPrivate(
 	ctx context.Context,
-	publicKey *ecdsa.PublicKey,
+	recipient *ecdsa.PublicKey,
 	data []byte,
 ) ([]byte, error) {
+	p.logger.Debug("sending private message", zap.Binary("recipient", crypto.FromECDSAPub(recipient)))
+
 	wrappedMessage, err := p.tryWrapMessageV1(data)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to wrap message")
@ -138,19 +147,19 @@ func (p *messageProcessor) sendPrivate(
 	messageID := protocol.MessageID(&p.identity.PublicKey, wrappedMessage)

 	if p.featureFlags.datasync {
-		if err := p.addToDataSync(publicKey, wrappedMessage); err != nil {
+		if err := p.addToDataSync(recipient, wrappedMessage); err != nil {
 			return nil, errors.Wrap(err, "failed to send message with datasync")
 		}

 		// No need to call transport tracking.
 		// It is done in a data sync dispatch step.
 	} else {
-		messageSpec, err := p.protocol.BuildDirectMessage(p.identity, publicKey, wrappedMessage)
+		messageSpec, err := p.protocol.BuildDirectMessage(p.identity, recipient, wrappedMessage)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to encrypt message")
 		}

-		hash, newMessage, err := p.sendMessageSpec(ctx, publicKey, messageSpec)
+		hash, newMessage, err := p.sendMessageSpec(ctx, recipient, messageSpec)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to send a message spec")
 		}
@ -161,6 +170,61 @@ func (p *messageProcessor) sendPrivate(
 	return messageID, nil
 }

+func (p *messageProcessor) SendGroup(
+	ctx context.Context,
+	recipients []*ecdsa.PublicKey,
+	chatID string,
+	data []byte,
+	clock int64,
+) ([][]byte, []*protocol.Message, error) {
+	p.logger.Debug("sending a group message", zap.Int("membersCount", len(recipients)))
+
+	message := protocol.CreatePrivateGroupTextMessage(data, clock, chatID)
+	encodedMessage, err := p.encodeMessage(message)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "failed to encode message")
+	}
+
+	var resultIDs [][]byte
+	for _, recipient := range recipients {
+		messageID, err := p.sendPrivate(ctx, recipient, encodedMessage)
+		if err != nil {
+			return nil, nil, err
+		}
+		resultIDs = append(resultIDs, messageID)
+	}
+	return resultIDs, nil, nil
+}
+
+func (p *messageProcessor) SendMembershipUpdate(
+	ctx context.Context,
+	recipients []*ecdsa.PublicKey,
+	chatID string,
+	updates []protocol.MembershipUpdate,
+	clock int64,
+) ([][]byte, error) {
+	p.logger.Debug("sending a membership update", zap.Int("membersCount", len(recipients)))
+
+	message := protocol.MembershipUpdateMessage{
+		ChatID:  chatID,
+		Updates: updates,
+	}
+	encodedMessage, err := protocol.EncodeMembershipUpdateMessage(message)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to encode membership update message")
+	}
+
+	var resultIDs [][]byte
+	for _, recipient := range recipients {
+		messageID, err := p.sendPrivate(ctx, recipient, encodedMessage)
+		if err != nil {
+			return nil, err
+		}
+		resultIDs = append(resultIDs, messageID)
+	}
+	return resultIDs, nil
+}
+
 func (p *messageProcessor) SendPublic(ctx context.Context, chatID string, data []byte, clock int64) ([]byte, error) {
 	logger := p.logger.With(zap.String("site", "SendPublic"))
 	logger.Debug("sending a public message", zap.String("chatID", chatID))
@ -249,6 +313,18 @@ func (p *messageProcessor) Process(shhMessage *whispertypes.Message) ([]*protoco
 			m.ID = statusMessage.ID
 			m.SigPubKey = statusMessage.SigPubKey()
 			decodedMessages = append(decodedMessages, &m)
+		case protocol.MembershipUpdateMessage:
+			// Handle user message that can be attached to the membership update.
+			userMessage := m.Message
+			if userMessage != nil {
+				userMessage.ID = statusMessage.ID
+				userMessage.SigPubKey = statusMessage.SigPubKey()
+				decodedMessages = append(decodedMessages, userMessage)
+			}
+
+			if err := p.processMembershipUpdate(m); err != nil {
+				hlogger.Error("failed to process MembershipUpdateMessage", zap.Error(err))
+			}
 		case protocol.PairMessage:
 			fromOurDevice := isPubKeyEqual(statusMessage.SigPubKey(), &p.identity.PublicKey)
 			if !fromOurDevice {
@ -267,6 +343,16 @@ func (p *messageProcessor) Process(shhMessage *whispertypes.Message) ([]*protoco
 	return decodedMessages, nil
 }

+func (p *messageProcessor) processMembershipUpdate(m protocol.MembershipUpdateMessage) error {
+	if err := m.Verify(); err != nil {
+		return err
+	}
+	if p.handler != nil {
+		return p.handler.HandleMembershipUpdate(m)
+	}
+	return errors.New("missing handler")
+}
+
 func (p *messageProcessor) processPairMessage(m protocol.PairMessage) error {
 	metadata := &multidevice.InstallationMetadata{
 		Name:       m.Name,
--- a/vendor/github.com/status-im/status-protocol-go/messenger.go
+++ b/vendor/github.com/status-im/status-protocol-go/messenger.go
@ -9,6 +9,8 @@ import (
 	"strings"
 	"time"

+	"github.com/ethereum/go-ethereum/common/hexutil"
+
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/pkg/errors"
 	"go.uber.org/zap"
@ -284,6 +286,7 @@ func NewMessenger(
 		database,
 		encryptionProtocol,
 		t,
+		newPersistentMessageHandler(&sqlitePersistence{db: database}),
 		logger,
 		c.featureFlags,
 	)
@ -454,12 +457,20 @@ func (m *Messenger) Mailservers() ([]string, error) {
 }

 func (m *Messenger) Join(chat Chat) error {
-	if chat.PublicKey != nil {
+	switch chat.ChatType {
+	case ChatTypeOneToOne:
 		return m.transport.JoinPrivate(chat.PublicKey)
-	} else if chat.Name != "" {
+	case ChatTypePrivateGroupChat:
+		members, err := chat.MembersAsPublicKeys()
+		if err != nil {
+			return err
+		}
+		return m.transport.JoinGroup(members)
+	case ChatTypePublic:
 		return m.transport.JoinPublic(chat.Name)
+	default:
+		return errors.New("chat is neither public nor private")
 	}
-	return errors.New("chat is neither public nor private")
 }

 func (m *Messenger) Leave(chat Chat) error {
@ -471,6 +482,94 @@ func (m *Messenger) Leave(chat Chat) error {
 	return errors.New("chat is neither public nor private")
 }

+// TODO: consider moving to a ChatManager ???
+func (m *Messenger) CreateGroupChat(name string) (*Chat, error) {
+	chat := createGroupChat()
+	group, err := protocol.NewGroupWithCreator(name, m.identity)
+	if err != nil {
+		return nil, err
+	}
+	chat.updateChatFromProtocolGroup(group)
+	return &chat, nil
+}
+
+func (m *Messenger) AddMembersToChat(ctx context.Context, chat *Chat, members []*ecdsa.PublicKey) error {
+	group, err := newProtocolGroupFromChat(chat)
+	if err != nil {
+		return err
+	}
+	encodedMembers := make([]string, len(members))
+	for idx, member := range members {
+		encodedMembers[idx] = hexutil.Encode(crypto.FromECDSAPub(member))
+	}
+	event := protocol.NewMembersAddedEvent(encodedMembers, group.NextClockValue())
+	err = group.ProcessEvent(&m.identity.PublicKey, event)
+	if err != nil {
+		return err
+	}
+	if err := m.propagateMembershipUpdates(ctx, group); err != nil {
+		return err
+	}
+	chat.updateChatFromProtocolGroup(group)
+	return m.SaveChat(*chat)
+}
+
+func (m *Messenger) ConfirmJoiningGroup(ctx context.Context, chat *Chat) error {
+	group, err := newProtocolGroupFromChat(chat)
+	if err != nil {
+		return err
+	}
+	event := protocol.NewMemberJoinedEvent(
+		statusproto.EncodeHex(crypto.FromECDSAPub(&m.identity.PublicKey)),
+		group.NextClockValue(),
+	)
+	err = group.ProcessEvent(&m.identity.PublicKey, event)
+	if err != nil {
+		return err
+	}
+	if err := m.propagateMembershipUpdates(ctx, group); err != nil {
+		return err
+	}
+	chat.updateChatFromProtocolGroup(group)
+	return m.SaveChat(*chat)
+}
+
+func (m *Messenger) propagateMembershipUpdates(ctx context.Context, group *protocol.Group) error {
+	events := make([]protocol.MembershipUpdateEvent, len(group.Updates()))
+	for idx, event := range group.Updates() {
+		events[idx] = event.MembershipUpdateEvent
+	}
+	update := protocol.MembershipUpdate{
+		ChatID: group.ChatID(),
+		Events: events,
+	}
+	if err := update.Sign(m.identity); err != nil {
+		return err
+	}
+	recipients, err := stringSliceToPublicKeys(group.Members(), true)
+	if err != nil {
+		return err
+	}
+	// Filter out my key from the recipients
+	n := 0
+	for _, recipient := range recipients {
+		if !isPubKeyEqual(recipient, &m.identity.PublicKey) {
+			recipients[n] = recipient
+			n++
+		}
+	}
+	recipients = recipients[:n]
+	// Finally send membership updates to all recipients.
+	_, err = m.processor.SendMembershipUpdate(
+		ctx,
+		recipients,
+		group.ChatID(),
+		[]protocol.MembershipUpdate{update},
+		group.NextClockValue(),
+	)
+	return err
+}
+
 func (m *Messenger) SaveChat(chat Chat) error {
 	return m.persistence.SaveChat(chat)
 }
@ -522,7 +621,7 @@ func (m *Messenger) Contacts() ([]*Contact, error) {
 	return m.persistence.Contacts()
 }

-func (m *Messenger) Send(ctx context.Context, chatID string, data []byte) ([]byte, error) {
+func (m *Messenger) Send(ctx context.Context, chatID string, data []byte) ([][]byte, error) {
 	logger := m.logger.With(zap.String("site", "Send"), zap.String("chatID", chatID))

 	// A valid added chat is required.
@ -538,7 +637,8 @@ func (m *Messenger) Send(ctx context.Context, chatID string, data []byte) ([]byt

 	logger.Debug("last message clock received", zap.Int64("clock", clock))

-	if chat.PublicKey != nil {
+	switch chat.ChatType {
+	case ChatTypeOneToOne:
 		logger.Debug("sending private message", zap.Binary("publicKey", crypto.FromECDSAPub(chat.PublicKey)))

 		id, message, err := m.processor.SendPrivate(ctx, chat.PublicKey, chat.ID, data, clock)
@ -546,27 +646,64 @@ func (m *Messenger) Send(ctx context.Context, chatID string, data []byte) ([]byt
 			return nil, err
 		}

-		// Save our message because it won't be received from the transport layer.
-		message.ID = id // a Message need ID to be properly stored in the db
-		message.SigPubKey = &m.identity.PublicKey
-		message.ChatID = chatID
+		if err := m.cacheOwnMessage(chatID, id, message); err != nil {
+			return nil, err
+		}

-		if m.messagesPersistenceEnabled {
-			_, err = m.persistence.SaveMessages([]*protocol.Message{message})
-			if err != nil {
+		return [][]byte{id}, nil
+	case ChatTypePublic:
+		logger.Debug("sending public message", zap.String("chatName", chat.Name))
+		id, err := m.processor.SendPublic(ctx, chat.ID, data, clock)
+		if err != nil {
+			return nil, err
+		}
+		return [][]byte{id}, nil
+	case ChatTypePrivateGroupChat:
+		logger.Debug("sending group message", zap.String("chatName", chat.Name))
+		recipients, err := chat.MembersAsPublicKeys()
+		if err != nil {
+			return nil, err
+		}
+		// Filter me out of recipients.
+		n := 0
+		for _, item := range recipients {
+			if !isPubKeyEqual(item, &m.identity.PublicKey) {
+				recipients[n] = item
+				n++
+			}
+		}
+		ids, messages, err := m.processor.SendGroup(ctx, recipients[:n], chat.ID, data, clock)
+		if err != nil {
+			return nil, err
+		}
+		for idx, message := range messages {
+			if err := m.cacheOwnMessage(chatID, ids[idx], message); err != nil {
 				return nil, err
 			}
 		}
-
-		// Cache it to be returned in Retrieve().
-		m.ownMessages = append(m.ownMessages, message)
-
-		return id, nil
-	} else if chat.Name != "" {
-		logger.Debug("sending public message", zap.String("chatName", chat.Name))
-		return m.processor.SendPublic(ctx, chat.ID, data, clock)
+		return ids, nil
+	default:
+		return nil, errors.New("chat is neither public nor private")
 	}
-	return nil, errors.New("chat is neither public nor private")
+}
+
+func (m *Messenger) cacheOwnMessage(chatID string, id []byte, message *protocol.Message) error {
+	// Save our message because it won't be received from the transport layer.
+	message.ID = id // a Message need ID to be properly stored in the db
+	message.SigPubKey = &m.identity.PublicKey
+	message.ChatID = chatID
+
+	if m.messagesPersistenceEnabled {
+		_, err := m.persistence.SaveMessages([]*protocol.Message{message})
+		if err != nil {
+			return err
+		}
+	}
+
+	// Cache it to be returned in Retrieve().
+	m.ownMessages = append(m.ownMessages, message)
+
+	return nil
 }

 // SendRaw takes encoded data, encrypts it and sends through the wire.
--- a/vendor/github.com/status-im/status-protocol-go/transport/whisper/whisper_service.go
+++ b/vendor/github.com/status-im/status-protocol-go/transport/whisper/whisper_service.go
@ -81,6 +81,9 @@ type WhisperServiceTransport struct {
 }

 // NewWhisperServiceTransport returns a new WhisperServiceTransport.
+// TODO: leaving a chat should verify that for a given public key
+//       there are no other chats. It may happen that we leave a private chat
+//       but still have a public chat for a given public key.
 func NewWhisperServiceTransport(
 	shh whispertypes.Whisper,
 	privateKey *ecdsa.PrivateKey,
@ -185,6 +188,30 @@ func (a *WhisperServiceTransport) LeavePrivate(publicKey *ecdsa.PublicKey) error
 	return a.filters.Remove(filters...)
 }

+func (a *WhisperServiceTransport) JoinGroup(publicKeys []*ecdsa.PublicKey) error {
+	_, err := a.filters.LoadDiscovery()
+	if err != nil {
+		return err
+	}
+	for _, pk := range publicKeys {
+		_, err = a.filters.LoadContactCode(pk)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (a *WhisperServiceTransport) LeaveGroup(publicKeys []*ecdsa.PublicKey) error {
+	for _, publicKey := range publicKeys {
+		filters := a.filters.FiltersByPublicKey(publicKey)
+		if err := a.filters.Remove(filters...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 type Message struct {
 	Message *whispertypes.Message
 	Public  bool
--- a/vendor/github.com/status-im/status-protocol-go/v1/decoder.go
+++ b/vendor/github.com/status-im/status-protocol-go/v1/decoder.go
@ -163,10 +163,6 @@ func membershipUpdateMessageHandler(d transit.Decoder, value interface{}) (inter
 				if !ok {
 					break
 				}
-				update.From, ok = value[transit.Keyword("from")].(string)
-				if !ok {
-					break
-				}
 				update.Signature, ok = value[transit.Keyword("signature")].(string)
 				if !ok {
 					break
--- a/vendor/github.com/status-im/status-protocol-go/v1/encoder.go
+++ b/vendor/github.com/status-im/status-protocol-go/v1/encoder.go
@ -77,7 +77,6 @@ func (messageValueEncoder) Encode(e transit.Encoder, value reflect.Value, asStri

 			element := map[interface{}]interface{}{
 				transit.Keyword("chat-id"):   update.ChatID,
-				transit.Keyword("from"):      update.From,
 				transit.Keyword("events"):    events,
 				transit.Keyword("signature"): update.Signature,
 			}
--- a/vendor/github.com/status-im/status-protocol-go/v1/membership_update_message.go
+++ b/vendor/github.com/status-im/status-protocol-go/v1/membership_update_message.go
@ -3,10 +3,18 @@ package statusproto
 import (
 	"bytes"
 	"crypto/ecdsa"
+	"encoding/hex"
 	"encoding/json"
+	"fmt"
 	"reflect"
 	"sort"
+	"strings"
+	"time"

+	"github.com/ethereum/go-ethereum/common/hexutil"
+	gethcrypto "github.com/ethereum/go-ethereum/crypto"
+	"github.com/google/uuid"
+	"github.com/pkg/errors"
 	"github.com/status-im/status-protocol-go/crypto"
 )

@ -29,11 +37,35 @@ type MembershipUpdateMessage struct {
 	Message *Message           `json:"message"` // optional message
 }

+// Verify makes sure that the received update message has a valid signature.
+// It also extracts public key from the signature available as From field.
+// It does not verify the updates and their events. This should be done
+// separately using Group struct.
+func (m *MembershipUpdateMessage) Verify() error {
+	for idx, update := range m.Updates {
+		if err := update.extractFrom(); err != nil {
+			return errors.Wrapf(err, "failed to extract an author of %d update", idx)
+		}
+		m.Updates[idx] = update
+	}
+	return nil
+}
+
+// EncodeMembershipUpdateMessage encodes a MembershipUpdateMessage using Transit serialization.
+func EncodeMembershipUpdateMessage(value MembershipUpdateMessage) ([]byte, error) {
+	var buf bytes.Buffer
+	encoder := NewMessageEncoder(&buf)
+	if err := encoder.Encode(value); err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
 type MembershipUpdate struct {
 	ChatID    string                  `json:"chatId"`
-	From      string                  `json:"from"`
-	Signature string                  `json:"signature"`
+	Signature string                  `json:"signature"` // hex-encoded without 0x prefix
 	Events    []MembershipUpdateEvent `json:"events"`
+	From      string                  `json:"from"` // hex-encoded with 0x prefix
 }

 // Sign creates a signature from MembershipUpdateEvents
@ -41,22 +73,7 @@ type MembershipUpdate struct {
 // It follows the algorithm describe in the spec:
 // https://github.com/status-im/specs/blob/master/status-group-chats-spec.md#signature.
 func (u *MembershipUpdate) Sign(identity *ecdsa.PrivateKey) error {
-	sort.Slice(u.Events, func(i, j int) bool {
-		return u.Events[i].ClockValue < u.Events[j].ClockValue
-	})
-	tuples := make([]interface{}, len(u.Events))
-	for idx, event := range u.Events {
-		tuples[idx] = tupleMembershipUpdateEvent(event)
-	}
-	structureToSign := []interface{}{
-		tuples,
-		u.ChatID,
-	}
-	data, err := json.Marshal(structureToSign)
-	if err != nil {
-		return err
-	}
-	signature, err := crypto.SignBytesAsHex(data, identity)
+	signature, err := createMembershipUpdateSignature(u.ChatID, u.Events, identity)
 	if err != nil {
 		return err
 	}
@ -64,6 +81,38 @@ func (u *MembershipUpdate) Sign(identity *ecdsa.PrivateKey) error {
 	return nil
 }

+func (u *MembershipUpdate) extractFrom() error {
+	content, err := stringifyMembershipUpdateEvents(u.ChatID, u.Events)
+	if err != nil {
+		return errors.Wrap(err, "failed to stringify events")
+	}
+	signatureBytes, err := hex.DecodeString(u.Signature)
+	if err != nil {
+		return errors.Wrap(err, "failed to decode signature")
+	}
+	publicKey, err := crypto.ExtractSignature(content, signatureBytes)
+	if err != nil {
+		return errors.Wrap(err, "failed to extract signature")
+	}
+	u.From = hexutil.Encode(gethcrypto.FromECDSAPub(publicKey))
+	return nil
+}
+
+func (u *MembershipUpdate) Flat() []MembershipUpdateFlat {
+	result := make([]MembershipUpdateFlat, 0, len(u.Events))
+	for _, event := range u.Events {
+		result = append(result, MembershipUpdateFlat{
+			MembershipUpdateEvent: event,
+			ChatID:                u.ChatID,
+			Signature:             u.Signature,
+			From:                  u.From,
+		})
+	}
+	return result
+}
+
+// MembershipUpdateEvent contains an event information.
+// Member and Members are hex-encoded values with 0x prefix.
 type MembershipUpdateEvent struct {
 	Type       string   `json:"type"`
 	ClockValue int64    `json:"clockValue"`
@ -72,10 +121,49 @@ type MembershipUpdateEvent struct {
 	Name       string   `json:"name,omitempty"`    // name of the group chat
 }

-func NewChatCreatedEvent(name string, clock int64) MembershipUpdateEvent {
+func (u MembershipUpdateEvent) Equal(update MembershipUpdateEvent) bool {
+	return u.Type == update.Type &&
+		u.ClockValue == update.ClockValue &&
+		u.Member == update.Member &&
+		stringSliceEquals(u.Members, update.Members) &&
+		u.Name == update.Name
+}
+
+type MembershipUpdateFlat struct {
+	MembershipUpdateEvent
+	ChatID    string `json:"chatId"`
+	Signature string `json:"signature"`
+	From      string `json:"from"`
+}
+
+func (u MembershipUpdateFlat) Equal(update MembershipUpdateFlat) bool {
+	return u.ChatID == update.ChatID &&
+		u.Signature == update.Signature &&
+		u.From == update.From &&
+		u.MembershipUpdateEvent.Equal(update.MembershipUpdateEvent)
+}
+
+func MergeFlatMembershipUpdates(dest []MembershipUpdateFlat, src []MembershipUpdateFlat) []MembershipUpdateFlat {
+	for _, update := range src {
+		var exists bool
+		for _, existing := range dest {
+			if existing.Equal(update) {
+				exists = true
+				break
+			}
+		}
+		if !exists {
+			dest = append(dest, update)
+		}
+	}
+	return dest
+}
+
+func NewChatCreatedEvent(name string, admin string, clock int64) MembershipUpdateEvent {
 	return MembershipUpdateEvent{
 		Type:       MembershipUpdateChatCreated,
 		Name:       name,
+		Member:     admin,
 		ClockValue: clock,
 	}
 }
@ -128,14 +216,27 @@ func NewAdminRemovedEvent(admin string, clock int64) MembershipUpdateEvent {
 	}
 }

-// EncodeMembershipUpdateMessage encodes a MembershipUpdateMessage using Transit serialization.
-func EncodeMembershipUpdateMessage(value MembershipUpdateMessage) ([]byte, error) {
-	var buf bytes.Buffer
-	encoder := NewMessageEncoder(&buf)
-	if err := encoder.Encode(value); err != nil {
-		return nil, err
+func stringifyMembershipUpdateEvents(chatID string, events []MembershipUpdateEvent) ([]byte, error) {
+	sort.Slice(events, func(i, j int) bool {
+		return events[i].ClockValue < events[j].ClockValue
+	})
+	tuples := make([]interface{}, len(events))
+	for idx, event := range events {
+		tuples[idx] = tupleMembershipUpdateEvent(event)
 	}
-	return buf.Bytes(), nil
+	structureToSign := []interface{}{
+		tuples,
+		chatID,
+	}
+	return json.Marshal(structureToSign)
+}
+
+func createMembershipUpdateSignature(chatID string, events []MembershipUpdateEvent, identity *ecdsa.PrivateKey) (string, error) {
+	data, err := stringifyMembershipUpdateEvents(chatID, events)
+	if err != nil {
+		return "", err
+	}
+	return crypto.SignBytesAsHex(data, identity)
 }

 var membershipUpdateEventFieldNamesCompat = map[string]string{
@ -173,41 +274,222 @@ func tupleMembershipUpdateEvent(update MembershipUpdateEvent) [][]interface{} {
 }

 type Group struct {
-	ChatID   string
-	Admins   []string
-	Contacts []string
+	chatID  string
+	name    string
+	updates []MembershipUpdateFlat
+	admins  *stringSet
+	members *stringSet
 }

-// ValidateEvent returns true if a given event is valid.
-func (g *Group) ValidateEvent(from string, event MembershipUpdateEvent) bool {
+func groupChatID(creator *ecdsa.PublicKey) string {
+	return uuid.New().String() + "-" + hexutil.Encode(gethcrypto.FromECDSAPub(creator))
+}
+
+func NewGroupWithMembershipUpdates(chatID string, updates []MembershipUpdate) (*Group, error) {
+	flatten := make([]MembershipUpdateFlat, 0, len(updates))
+	for _, update := range updates {
+		flatten = append(flatten, update.Flat()...)
+	}
+	return newGroup(chatID, flatten)
+}
+
+func NewGroupWithCreator(name string, creator *ecdsa.PrivateKey) (*Group, error) {
+	chatID := groupChatID(&creator.PublicKey)
+	creatorHex := publicKeyToString(&creator.PublicKey)
+	clock := TimestampInMsFromTime(time.Now())
+	chatCreated := NewChatCreatedEvent(name, creatorHex, int64(clock))
+	update := MembershipUpdate{
+		ChatID: chatID,
+		From:   creatorHex,
+		Events: []MembershipUpdateEvent{chatCreated},
+	}
+	if err := update.Sign(creator); err != nil {
+		return nil, err
+	}
+	return newGroup(chatID, update.Flat())
+}
+
+func NewGroup(chatID string, updates []MembershipUpdateFlat) (*Group, error) {
+	return newGroup(chatID, updates)
+}
+
+func newGroup(chatID string, updates []MembershipUpdateFlat) (*Group, error) {
+	g := Group{
+		chatID:  chatID,
+		updates: updates,
+		admins:  newStringSet(),
+		members: newStringSet(),
+	}
+	if err := g.init(); err != nil {
+		return nil, err
+	}
+	return &g, nil
+}
+
+func (g *Group) init() error {
+	g.sortEvents()
+
+	var chatID string
+
+	for _, update := range g.updates {
+		if chatID == "" {
+			chatID = update.ChatID
+		} else if update.ChatID != chatID {
+			return errors.New("updates contain different chat IDs")
+		}
+		valid := g.validateEvent(update.From, update.MembershipUpdateEvent)
+		if !valid {
+			return fmt.Errorf("invalid event %#+v from %s", update.MembershipUpdateEvent, update.From)
+		}
+		g.processEvent(update.From, update.MembershipUpdateEvent)
+	}
+
+	valid := g.validateChatID(g.chatID)
+	if !valid {
+		return fmt.Errorf("invalid chat ID: %s", g.chatID)
+	}
+	if chatID != g.chatID {
+		return fmt.Errorf("expected chat ID equal %s, got %s", g.chatID, chatID)
+	}
+
+	return nil
+}
+
+func (g Group) ChatID() string {
+	return g.chatID
+}
+
+func (g Group) Updates() []MembershipUpdateFlat {
+	return g.updates
+}
+
+func (g Group) Name() string {
+	return g.name
+}
+
+func (g Group) Members() []string {
+	return g.members.List()
+}
+
+func (g Group) Admins() []string {
+	return g.admins.List()
+}
+
+func (g Group) Joined() []string {
+	var result []string
+	for _, update := range g.updates {
+		if update.Type == MembershipUpdateMemberJoined {
+			result = append(result, update.Member)
+		}
+	}
+	return result
+}
+
+func (g *Group) ProcessEvents(from *ecdsa.PublicKey, events []MembershipUpdateEvent) error {
+	for _, event := range events {
+		err := g.ProcessEvent(from, event)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (g *Group) ProcessEvent(from *ecdsa.PublicKey, event MembershipUpdateEvent) error {
+	fromHex := hexutil.Encode(gethcrypto.FromECDSAPub(from))
+	if !g.validateEvent(fromHex, event) {
+		return fmt.Errorf("invalid event %#+v from %s", event, from)
+	}
+	update := MembershipUpdate{
+		ChatID: g.chatID,
+		From:   fromHex,
+		Events: []MembershipUpdateEvent{event},
+	}
+	g.updates = append(g.updates, update.Flat()...)
+	g.processEvent(fromHex, event)
+	return nil
+}
+
+func (g Group) LastClockValue() int64 {
+	if len(g.updates) == 0 {
+		return 0
+	}
+	return g.updates[len(g.updates)-1].ClockValue
+}
+
+func (g Group) NextClockValue() int64 {
+	return g.LastClockValue() + 1
+}
+
+func (g Group) creator() (string, error) {
+	if len(g.updates) == 0 {
+		return "", errors.New("no events in the group")
+	}
+	first := g.updates[0]
+	if first.Type != MembershipUpdateChatCreated {
+		return "", fmt.Errorf("expected first event to be 'chat-created', got %s", first.Type)
+	}
+	return first.From, nil
+}
+
+func (g Group) validateChatID(chatID string) bool {
+	creator, err := g.creator()
+	if err != nil || creator == "" {
+		return false
+	}
+	// TODO: It does not verify that the prefix is a valid UUID.
+	//       Improve it so that the prefix follows UUIDv4 spec.
+	return strings.HasSuffix(chatID, creator) && chatID != creator
+}
+
+// validateEvent returns true if a given event is valid.
+func (g Group) validateEvent(from string, event MembershipUpdateEvent) bool {
 	switch event.Type {
 	case MembershipUpdateChatCreated:
-		return len(g.Admins) == 0 && len(g.Contacts) == 0
+		return g.admins.Empty() && g.members.Empty()
 	case MembershipUpdateNameChanged:
-		return stringSliceContains(g.Admins, from) && len(event.Name) > 0
+		return g.admins.Has(from) && len(event.Name) > 0
 	case MembershipUpdateMembersAdded:
-		return stringSliceContains(g.Admins, from)
+		return g.admins.Has(from)
 	case MembershipUpdateMemberJoined:
-		return stringSliceContains(g.Contacts, from) && from == event.Member
+		return g.members.Has(from) && from == event.Member
 	case MembershipUpdateMemberRemoved:
 		// Member can remove themselves or admin can remove a member.
-		return from == event.Member || (stringSliceContains(g.Admins, from) && !stringSliceContains(g.Admins, event.Member))
+		return from == event.Member || (g.admins.Has(from) && !g.admins.Has(event.Member))
 	case MembershipUpdateAdminsAdded:
-		return stringSliceContains(g.Admins, from) && stringSliceSubset(event.Members, g.Contacts)
+		return g.admins.Has(from) && stringSliceSubset(event.Members, g.members.List())
 	case MembershipUpdateAdminRemoved:
-		return stringSliceContains(g.Admins, from) && from == event.Member
+		return g.admins.Has(from) && from == event.Member
 	default:
 		return false
 	}
 }

-func stringSliceContains(slice []string, item string) bool {
-	for _, s := range slice {
-		if s == item {
-			return true
-		}
+func (g *Group) processEvent(from string, event MembershipUpdateEvent) {
+	switch event.Type {
+	case MembershipUpdateChatCreated:
+		g.name = event.Name
+		g.members.Add(event.Member)
+		g.admins.Add(event.Member)
+	case MembershipUpdateNameChanged:
+		g.name = event.Name
+	case MembershipUpdateAdminsAdded:
+		g.admins.Add(event.Members...)
+	case MembershipUpdateAdminRemoved:
+		g.admins.Remove(event.Member)
+	case MembershipUpdateMembersAdded:
+		g.members.Add(event.Members...)
+	case MembershipUpdateMemberRemoved:
+		g.members.Remove(event.Member)
+	case MembershipUpdateMemberJoined:
+		g.members.Add(event.Member)
 	}
-	return false
+}
+
+func (g *Group) sortEvents() {
+	sort.Slice(g.updates, func(i, j int) bool {
+		return g.updates[i].ClockValue < g.updates[j].ClockValue
+	})
 }

 func stringSliceSubset(subset []string, set []string) bool {
@ -225,3 +507,82 @@ func stringSliceSubset(subset []string, set []string) bool {
 	}
 	return false
 }
+
+func stringSliceEquals(slice1, slice2 []string) bool {
+	set := map[string]struct{}{}
+	for _, s := range slice1 {
+		set[s] = struct{}{}
+	}
+	for _, s := range slice2 {
+		_, ok := set[s]
+		if !ok {
+			return false
+		}
+	}
+	return true
+}
+
+func publicKeyToString(publicKey *ecdsa.PublicKey) string {
+	return hexutil.Encode(gethcrypto.FromECDSAPub(publicKey))
+}
+
+type stringSet struct {
+	m     map[string]struct{}
+	items []string
+}
+
+func newStringSet() *stringSet {
+	return &stringSet{
+		m: make(map[string]struct{}),
+	}
+}
+
+func newStringSetFromSlice(s []string) *stringSet {
+	set := newStringSet()
+	if len(s) > 0 {
+		set.Add(s...)
+	}
+	return set
+}
+
+func (s *stringSet) Add(items ...string) {
+	for _, item := range items {
+		if _, ok := s.m[item]; !ok {
+			s.m[item] = struct{}{}
+			s.items = append(s.items, item)
+		}
+	}
+}
+
+func (s *stringSet) Remove(items ...string) {
+	for _, item := range items {
+		if _, ok := s.m[item]; ok {
+			delete(s.m, item)
+			s.removeFromItems(item)
+		}
+	}
+}
+
+func (s *stringSet) Has(item string) bool {
+	_, ok := s.m[item]
+	return ok
+}
+
+func (s *stringSet) Empty() bool {
+	return len(s.items) == 0
+}
+
+func (s *stringSet) List() []string {
+	return s.items
+}
+
+func (s *stringSet) removeFromItems(dropped string) {
+	n := 0
+	for _, item := range s.items {
+		if item != dropped {
+			s.items[n] = item
+			n++
+		}
+	}
+	s.items = s.items[:n]
+}
--- a/vendor/github.com/vacp2p/mvds/node/node.go
+++ b/vendor/github.com/vacp2p/mvds/node/node.go
@ -492,7 +492,7 @@ func (n *Node) onMessage(sender state.PeerID, msg protobuf.Message) error {
 	)

 	err := n.syncState.Remove(id, sender)
-	if err != nil {
+	if err != nil && err != state.ErrStateNotFound {
 		return err
 	}

--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@ -122,9 +122,10 @@ github.com/go-stack/stack
 # github.com/gogo/protobuf v1.3.0
 github.com/gogo/protobuf/io
 github.com/gogo/protobuf/proto
-# github.com/golang-migrate/migrate/v4 v4.5.0
+# github.com/golang-migrate/migrate/v4 v4.6.2
 github.com/golang-migrate/migrate/v4
 github.com/golang-migrate/migrate/v4/database
+github.com/golang-migrate/migrate/v4/internal/url
 github.com/golang-migrate/migrate/v4/source
 # github.com/golang/mock v1.3.1
 github.com/golang/mock/gomock
@ -339,16 +340,17 @@ github.com/status-im/doubleratchet
 github.com/status-im/go-multiaddr-ethv4
 # github.com/status-im/keycard-go v0.0.0-20190424133014-d95853db0f48
 github.com/status-im/keycard-go/derivationpath
-# github.com/status-im/migrate/v4 v4.3.1-status.0.20190822050738-a9d340ec8fb7
+# github.com/status-im/migrate/v4 v4.6.2-status.2
 github.com/status-im/migrate/v4
 github.com/status-im/migrate/v4/database/postgres
 github.com/status-im/migrate/v4/database/sqlcipher
+github.com/status-im/migrate/v4/internal/url
 github.com/status-im/migrate/v4/source/go_bindata
 # github.com/status-im/rendezvous v1.3.0
 github.com/status-im/rendezvous
 github.com/status-im/rendezvous/protocol
 github.com/status-im/rendezvous/server
-# github.com/status-im/status-protocol-go v0.3.1
+# github.com/status-im/status-protocol-go v0.4.1-0.20191014103017-1f15a058b66c
 github.com/status-im/status-protocol-go
 github.com/status-im/status-protocol-go/applicationmetadata
 github.com/status-im/status-protocol-go/bridge/geth
@ -396,7 +398,7 @@ github.com/syndtr/goleveldb/leveldb/util
 # github.com/tyler-smith/go-bip39 v1.0.2
 github.com/tyler-smith/go-bip39
 github.com/tyler-smith/go-bip39/wordlists
-# github.com/vacp2p/mvds v0.0.21
+# github.com/vacp2p/mvds v0.0.23-0.20191014101555-026e462c829d
 github.com/vacp2p/mvds/node
 github.com/vacp2p/mvds/node/migrations
 github.com/vacp2p/mvds/peers