feature/1114 implement account interface (#1167)

- **refactor: move session-related code to middleware package**
- **refactor: update PKL build process and adjust related
configurations**
- **feat: integrate base.cosmos.v1 Genesis module**
- **refactor: pass session context to modal rendering functions**
- **refactor: move nebula package to app directory and update templ
version**
- **refactor: Move home section video view to dedicated directory**
- **refactor: remove unused views file**
- **refactor: move styles and UI components to global scope**
- **refactor: Rename images.go to cdn.go**
- **feat: Add Empty State Illustrations**
- **refactor: Consolidate Vault Index Logic**
- **fix: References to App.wasm and remove Vault Directory embedded CDN
files**
- **refactor: Move CDN types to Models**
- **fix: Correct line numbers in templ error messages for
arch_templ.go**
- **refactor: use common types for peer roles**
- **refactor: move common types and ORM to a shared package**
- **fix: Config import dwn**
- **refactor: move nebula directory to app**
- **feat: Rebuild nebula**
- **fix: correct file paths in panels templates**
- **feat: Remove duplicate types**
- **refactor: Move dwn to pkg/core**
- **refactor: Binary Structure**
- **feat: Introduce Crypto Pkg**
- **fix: Broken Process Start**
- **feat: Update pkg/* structure**
- **feat: Refactor PKL Structure**
- **build: update pkl build process**
- **chore: Remove Empty Files**
- **refactor: remove unused macaroon package**
- **feat: Add WebAwesome Components**
- **refactor: consolidate build and generation tasks into a single
taskfile, remove redundant makefile targets**
- **refactor: refactor server and move components to pkg/core/dwn**
- **build: update go modules**
- **refactor: move gateway logic into dedicated hway command**
- **feat: Add KSS (Krawczyk-Song-Song) MPC cryptography module**
- **feat: Implement MPC-based JWT signing and UCAN token generation**
- **feat: add support for MPC-based JWT signing**
- **feat: Implement MPC-based UCAN capabilities for smart accounts**
- **feat: add address field to keyshareSource**
- **feat: Add comprehensive MPC test suite for keyshares, UCAN tokens,
and token attenuations**
- **refactor: improve MPC keyshare management and signing process**
- **feat: enhance MPC capability hierarchy documentation**
- **refactor: rename GenerateKeyshares function to NewKeyshareSource for
clarity**
- **refactor: remove unused Ethereum address computation**
- **feat: Add HasHandle and IsAuthenticated methods to HTTPContext**
- **refactor: Add context.Context support to session HTTPContext**
- **refactor: Resolve context interface conflicts in HTTPContext**
- **feat: Add session ID context key and helper functions**
- **feat: Update WebApp Page Rendering**
- **refactor: Simplify context management by using single HTTPContext
key**
- **refactor: Simplify HTTPContext creation and context management in
session middleware**
- **refactor: refactor session middleware to use a single data
structure**
- **refactor: Simplify HTTPContext implementation and session data
handling**
- **refactor: Improve session context handling and prevent nil pointer
errors**
- **refactor: Improve session context handling with nil safety and type
support**
- **refactor: improve session data injection**
- **feat: add full-screen modal component and update registration flow**
- **chore: add .air.toml to .gitignore**
- **feat: add Air to devbox and update dependencies**

pkg/crypto/signatures/bbs/signature.go

@@ -0,0 +1,67 @@
+//
+// Copyright Coinbase, Inc. All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+// Package bbs is an implementation of BBS+ signature of https://eprint.iacr.org/2016/663.pdf
+package bbs
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/onsonr/sonr/pkg/crypto/core/curves"
+)
+
+// Signature is a BBS+ signature
+// as described in 4.3 in
+// <https://eprint.iacr.org/2016/663.pdf>
+type Signature struct {
+	a    curves.PairingPoint
+	e, s curves.Scalar
+}
+
+// Init creates an empty signature to a specific curve
+// which should be followed by UnmarshalBinary or Create
+func (sig *Signature) Init(curve *curves.PairingCurve) *Signature {
+	sig.a = curve.NewG1IdentityPoint()
+	sig.e = curve.NewScalar()
+	sig.s = curve.NewScalar()
+	return sig
+}
+
+func (sig Signature) MarshalBinary() ([]byte, error) {
+	out := append(sig.a.ToAffineCompressed(), sig.e.Bytes()...)
+	out = append(out, sig.s.Bytes()...)
+	return out, nil
+}
+
+func (sig *Signature) UnmarshalBinary(data []byte) error {
+	pointLength := len(sig.a.ToAffineCompressed())
+	scalarLength := len(sig.s.Bytes())
+	expectedLength := pointLength + scalarLength*2
+	if len(data) != expectedLength {
+		return fmt.Errorf("invalid byte sequence")
+	}
+	a, err := sig.a.FromAffineCompressed(data[:pointLength])
+	if err != nil {
+		return err
+	}
+	e, err := sig.e.SetBytes(data[pointLength:(pointLength + scalarLength)])
+	if err != nil {
+		return err
+	}
+	s, err := sig.s.SetBytes(data[(pointLength + scalarLength):])
+	if err != nil {
+		return err
+	}
+	var ok bool
+	sig.a, ok = a.(curves.PairingPoint)
+	if !ok {
+		return errors.New("incorrect type conversion")
+	}
+	sig.e = e
+	sig.s = s
+	return nil
+}