diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index e8e16fc..f3f9ee8 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: "^1.22"
       - uses: actions/checkout@v3
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 767a453..e063793 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,6 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: "^1.22"
       - uses: actions/checkout@v3
       - uses: n8maninger/action-golang-test@v1
diff --git a/.gitignore b/.gitignore
index 70fa7ec..f74815d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,5 +18,8 @@ coverage.html
 # Vim
 *.sw?
 
+# Intellij and friends
+.idea/
+
 # Local TODO
 TODO.md
diff --git a/.golangci.yml b/.golangci.yml
index 1fbb83b..005e277 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -4,6 +4,16 @@
 # This file is not a configuration example,
 # it contains the exhaustive configuration with explanations of the options.
 
+issues:
+  # Which files to skip: they will be analyzed, but issues from them won't be reported.
+  # Default value is empty list,
+  # but there is no need to include all autogenerated files,
+  # we confidently recognize autogenerated files.
+  # If it's not please let us know.
+  # "/" will be replaced by current OS file path separator to properly work on Windows.
+  exclude-files:
+    - ".*_ssz\\.go$"
+
 # Options for analysis running.
 run:
   # The default concurrency value is the number of available CPU.
@@ -129,14 +139,4 @@ linters:
   # Disable specific linter
   # https://golangci-lint.run/usage/linters/#disabled-by-default
   disable:
-    - deadcode
     - depguard
-    - exhaustivestruct
-    - golint
-    - ifshort
-    - interfacer
-    - maligned
-    - nosnakecase
-    - scopelint
-    - structcheck
-    - varcheck
diff --git a/account.go b/account.go
index da05117..9323959 100644
--- a/account.go
+++ b/account.go
@@ -107,6 +107,9 @@ type AccountProtectingMultiSigner interface {
 		targetEpoch uint64,
 		targetRoot []byte,
 		domain []byte) ([]e2types.Signature, error)
+
+	// SignGenericMulti signs multiple generic data roots.
+	SignGenericMulti(ctx context.Context, accounts []Account, data [][]byte, domain []byte) ([]e2types.Signature, error)
 }
 
 // AccountCompositePublicKeyProvider is the interface for accounts that can provide a composite public key.
diff --git a/go.mod b/go.mod
index 128d576..ac17be1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,8 @@
 module github.com/wealdtech/go-eth2-wallet-types/v2
 
-go 1.20
+go 1.22
+
+toolchain go1.22.4
 
 require (
 	github.com/google/uuid v1.3.0
diff --git a/go.sum b/go.sum
index 9054a44..3a0edfb 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,5 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/ferranbt/fastssz v0.1.3 h1:ZI+z3JH05h4kgmFXdHuR1aWYsgrg7o+Fw7/NCzM16Mo=
 github.com/ferranbt/fastssz v0.1.3/go.mod h1:0Y9TEd/9XuFlh7mskMPfXiI2Dkw4Ddg9EyXt1W7MRvE=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
@@ -14,8 +15,11 @@ github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RR
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/umbracle/gohashtree v0.0.2-alpha.0.20230207094856-5b775a815c10 h1:CQh33pStIp/E30b7TxDlXfM0145bn2e8boI30IxAhTg=
+github.com/umbracle/gohashtree v0.0.2-alpha.0.20230207094856-5b775a815c10/go.mod h1:x/Pa0FF5Te9kdrlZKJK82YmAkvL8+f989USgz6Jiw7M=
 github.com/wealdtech/go-eth2-types/v2 v2.8.2 h1:b5aXlNBLKgjAg/Fft9VvGlqAUCQMP5LzYhlHRrr4yPg=
 github.com/wealdtech/go-eth2-types/v2 v2.8.2/go.mod h1:IAz9Lz1NVTaHabQa+4zjk2QDKMv8LVYo0n46M9o/TXw=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -26,3 +30,4 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=