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/bip32/bip32.go

@@ -0,0 +1,66 @@
+package bip32
+
+import (
+	"crypto/hmac"
+	"crypto/sha512"
+	"encoding/binary"
+	"errors"
+	"math/big"
+
+	"github.com/btcsuite/btcd/btcec/v2"
+)
+
+// ComputePublicKey computes the public key of a child key given the extended public key, chain code, and index.
+func ComputePublicKey(extPubKey []byte, chainCode uint32, index int) ([]byte, error) {
+	// Check if the index is a hardened child key
+	if chainCode&0x80000000 != 0 && index < 0 {
+		return nil, errors.New("invalid index")
+	}
+
+	// Serialize the public key
+	pubKey, err := btcec.ParsePubKey(extPubKey)
+	if err != nil {
+		return nil, err
+	}
+	pubKeyBytes := pubKey.SerializeCompressed()
+
+	// Serialize the index
+	indexBytes := make([]byte, 4)
+	binary.BigEndian.PutUint32(indexBytes, uint32(index))
+
+	// Compute the HMAC-SHA512
+	mac := hmac.New(sha512.New, []byte{byte(chainCode)})
+	mac.Write(pubKeyBytes)
+	mac.Write(indexBytes)
+	I := mac.Sum(nil)
+
+	// Split I into two 32-byte sequences
+	IL := I[:32]
+
+	// Convert IL to a big integer
+	ilNum := new(big.Int).SetBytes(IL)
+
+	// Check if parse256(IL) >= n
+	curve := btcec.S256()
+	if ilNum.Cmp(curve.N) >= 0 {
+		return nil, errors.New("invalid child key")
+	}
+
+	// Compute the child public key
+	ilx, ily := curve.ScalarBaseMult(IL)
+	childX, childY := curve.Add(ilx, ily, pubKey.X(), pubKey.Y())
+	lx := newBigIntFieldVal(childX)
+	ly := newBigIntFieldVal(childY)
+
+	// Create the child public key
+	childPubKey := btcec.NewPublicKey(lx, ly)
+	childPubKeyBytes := childPubKey.SerializeCompressed()
+	return childPubKeyBytes, nil
+}
+
+// newBigIntFieldVal creates a new field value from a big integer.
+func newBigIntFieldVal(val *big.Int) *btcec.FieldVal {
+	lx := new(btcec.FieldVal)
+	lx.SetByteSlice(val.Bytes())
+	return lx
+}