diff --git a/.gitignore b/.gitignore
index 7def77d..1ea749b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 coverage.out
 *.wasm
+
+dist/
diff --git a/.goreleaser.yaml b/.goreleaser.yaml
new file mode 100644
index 0000000..a7a0180
--- /dev/null
+++ b/.goreleaser.yaml
@@ -0,0 +1,39 @@
+version: 2
+
+before:
+  hooks:
+    - go generate ./...
+    - make fmt
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    id: goic
+    binary: goic
+    main: ./cmd/goic
+
+archives:
+  - format: tar.gz
+    name_template: >-
+      {{ .ProjectName }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}
+    format_overrides:
+      - goos: windows
+        format: zip
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"
diff --git a/certification/bls/bls.go b/certification/bls/bls.go
index 2a9e3e2..d255c9a 100644
--- a/certification/bls/bls.go
+++ b/certification/bls/bls.go
@@ -7,21 +7,24 @@ import (
 	"math/big"
 )
 
-const (
-	dstG1 = "BLS_SIG_BLS12381G1_XMD:SHA-256_SSWU_RO_NUL_"
-)
+const dstG1 = "BLS_SIG_BLS12381G1_XMD:SHA-256_SSWU_RO_NUL_"
+
+var g2, g2Gen bls.G2Affine
+
+func init() {
+	_, _, _, g2Gen = bls.Generators()
+	g2.Neg(&g2Gen)
+}
 
 type PublicKey bls.G2Affine
 
 // PublicKeyFromBytes returns a PublicKey from a byte slice.
 func PublicKeyFromBytes(b []byte) (*PublicKey, error) {
-	var pub bls.G2Affine
-	err := pub.Unmarshal(b)
-	if err != nil {
+	var publicKey bls.G2Affine
+	if err := publicKey.Unmarshal(b); err != nil {
 		return nil, err
 	}
-	res := PublicKey(pub)
-	return &res, err
+	return (*PublicKey)(&publicKey), nil
 }
 
 // PublicKeyFromHexString returns a PublicKey from a hex string.
@@ -37,44 +40,42 @@ type SecretKey fr.Element
 
 // NewSecretKeyByCSPRNG returns a new SecretKey generated by CSPRNG.
 func NewSecretKeyByCSPRNG() *SecretKey {
-	var sk fr.Element
-	_, err := sk.SetRandom()
-	if err != nil {
+	var secretKey fr.Element
+	if _, err := secretKey.SetRandom(); err != nil {
 		return nil
 	}
-	res := SecretKey(sk)
-	return &res
+	return (*SecretKey)(&secretKey)
 }
 
 func (sk *SecretKey) PublicKey() *PublicKey {
-	_, _, _, g2Gen := bls.Generators()
-
-	el := fr.Element(*sk)
-	v := el.BigInt(big.NewInt(0))
-
-	pk := g2Gen.ScalarMultiplication(&g2Gen, v)
-	return (*PublicKey)(pk)
+	element := fr.Element(*sk)
+	return (*PublicKey)(g2Gen.ScalarMultiplication(
+		&g2Gen,
+		element.BigInt(big.NewInt(0)),
+	))
 }
 
-func (sk *SecretKey) Sign(msg []byte) *Signature {
-	el := fr.Element(*sk)
-	v := el.BigInt(big.NewInt(0))
-	g1, _ := bls.HashToG1(msg, []byte(dstG1))
-	sig := g1.ScalarMultiplication(&g1, v)
-	return (*Signature)(sig)
+func (sk *SecretKey) Sign(msg []byte) (*Signature, error) {
+	element := fr.Element(*sk)
+	g1, err := bls.HashToG1(msg, []byte(dstG1))
+	if err != nil {
+		return nil, err
+	}
+	return (*Signature)(g1.ScalarMultiplication(
+		&g1,
+		element.BigInt(big.NewInt(0)),
+	)), nil
 }
 
 type Signature bls.G1Affine
 
 // SignatureFromBytes returns a Signature from a byte slice.
 func SignatureFromBytes(b []byte) (*Signature, error) {
-	var sig bls.G1Affine
-	_, err := sig.SetBytes(b)
-	if err != nil {
+	var signature bls.G1Affine
+	if _, err := signature.SetBytes(b); err != nil {
 		return nil, err
 	}
-	res := Signature(sig)
-	return &res, err
+	return (*Signature)(&signature), nil
 }
 
 // SignatureFromHexString returns a Signature from a hex string.
@@ -87,12 +88,14 @@ func SignatureFromHexString(s string) (*Signature, error) {
 }
 
 func (sig *Signature) Verify(pk *PublicKey, msg []byte) bool {
-	g1, _ := bls.HashToG1(msg, []byte(dstG1))
-	_, _, _, g2 := bls.Generators()
-	var g2n bls.G2Affine
-	g2n.Neg(&g2)
-
-	valid, err := bls.PairingCheck([]bls.G1Affine{bls.G1Affine(*sig), g1}, []bls.G2Affine{g2n, bls.G2Affine(*pk)})
+	g1, err := bls.HashToG1(msg, []byte(dstG1))
+	if err != nil {
+		return false
+	}
+	valid, err := bls.PairingCheck(
+		[]bls.G1Affine{bls.G1Affine(*sig), g1},
+		[]bls.G2Affine{g2, bls.G2Affine(*pk)},
+	)
 	if err != nil {
 		return false
 	}
diff --git a/certification/bls/bls_test.go b/certification/bls/bls_test.go
index 6c3d041..707bb17 100644
--- a/certification/bls/bls_test.go
+++ b/certification/bls/bls_test.go
@@ -2,15 +2,21 @@ package bls
 
 import (
 	"encoding/hex"
-	"github.com/stretchr/testify/assert"
 	"testing"
 )
 
 func TestSecretKey(t *testing.T) {
 	sk := NewSecretKeyByCSPRNG()
-	s := sk.Sign([]byte("hello"))
-	assert.True(t, s.Verify(sk.PublicKey(), []byte("hello")))
-	assert.False(t, s.Verify(sk.PublicKey(), []byte("world")))
+	s, err := sk.Sign([]byte("hello"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s.Verify(sk.PublicKey(), []byte("hello")) != true {
+		t.Error()
+	}
+	if s.Verify(sk.PublicKey(), []byte("world")) != false {
+		t.Error()
+	}
 }
 
 func TestVerify(t *testing.T) {
diff --git a/go.mod b/go.mod
index 91608b5..80948d5 100644
--- a/go.mod
+++ b/go.mod
@@ -8,21 +8,16 @@ require (
 	github.com/consensys/gnark-crypto v0.12.2-0.20240215234832-d72fcb379d3e
 	github.com/di-wu/parser v0.3.0
 	github.com/fxamacker/cbor/v2 v2.6.0
-	github.com/stretchr/testify v1.8.4
 	google.golang.org/protobuf v1.34.1
 )
 
 require (
 	github.com/bits-and-blooms/bitset v1.7.0 // indirect
 	github.com/consensys/bavard v0.1.13 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/google/go-cmp v0.5.9 // indirect
-	github.com/kr/text v0.2.0 // indirect
 	github.com/mmcloughlin/addchain v0.4.0 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rogpeppe/go-internal v1.9.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	golang.org/x/sys v0.15.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 	rsc.io/tmplfunc v0.0.3 // indirect
 )
diff --git a/go.sum b/go.sum
index 0aa90d2..00f2ab7 100644
--- a/go.sum
+++ b/go.sum
@@ -8,7 +8,6 @@ github.com/consensys/bavard v0.1.13 h1:oLhMLOFGTLdlda/kma4VOJazblc7IM5y5QPd2A/Yj
 github.com/consensys/bavard v0.1.13/go.mod h1:9ItSMtA/dXMAiL7BG6bqW2m3NdSEObYWoH223nGHukI=
 github.com/consensys/gnark-crypto v0.12.2-0.20240215234832-d72fcb379d3e h1:MKdOuCiy2DAX1tMp2YsmtNDaqdigpY6B5cZQDJ9BvEo=
 github.com/consensys/gnark-crypto v0.12.2-0.20240215234832-d72fcb379d3e/go.mod h1:wKqwsieaKPThcFkHe0d0zMsbHEUWFmZcG7KBCse210o=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 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/di-wu/parser v0.3.0 h1:NMOvy5ifswgt4gsdhySVcKOQtvjC43cHZIfViWctqQY=
@@ -18,10 +17,6 @@ github.com/fxamacker/cbor/v2 v2.6.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXE
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/subcommands v1.2.0/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=
-github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
-github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
-github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
-github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/leanovate/gopter v0.2.9 h1:fQjYxZaynp97ozCzfOyOuAGOU4aU/z37zf/tOujFk7c=
 github.com/leanovate/gopter v0.2.9/go.mod h1:U2L/78B+KVFIx2VmW6onHJQzXtFb+p5y3y2Sh+Jxxv8=
 github.com/mmcloughlin/addchain v0.4.0 h1:SobOdjm2xLj1KkXN5/n0xTIWyZA2+s99UCY1iPfkHRY=
@@ -29,8 +24,6 @@ github.com/mmcloughlin/addchain v0.4.0/go.mod h1:A86O+tHqZLMNO4w6ZZ4FlVQEadcoqky
 github.com/mmcloughlin/profile v0.1.1/go.mod h1:IhHD7q1ooxgwTgjxQYkACGA77oFTDdFVejUS1/tS/qU=
 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/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
-github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 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/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
@@ -39,9 +32,6 @@ golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
 golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
 google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 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=