refactor: move gateway and vault components to new locations

gateway/context/vaults.go

@@ -0,0 +1,45 @@
+package context
+
+import (
+	"github.com/onsonr/sonr/internal/crypto/mpc"
+	"github.com/onsonr/sonr/internal/common"
+	"lukechampine.com/blake3"
+)
+
+func (cc *GatewayContext) Spawn(handle, origin string) (*CreatePasskeyParams, error) {
+	challenge := GetAuthChallenge(cc)
+	sid := GetSessionID(cc)
+	nonce, err := calcNonce(sid)
+	if err != nil {
+		return nil, err
+	}
+	encl, err := mpc.GenEnclave(nonce)
+	if err != nil {
+		return nil, err
+	}
+	cc.stagedEnclaves[sid] = encl
+	common.WriteCookie(cc, common.SonrAddress, encl.Address())
+	return &CreatePasskeyParams{
+		Address:       encl.Address(),
+		Handle:        handle,
+		Name:          origin,
+		Challenge:     challenge,
+		CreationBlock: cc.StatusBlock(),
+	}, nil
+}
+
+// Uses blake3 to hash the sessionID to generate a nonce of length 12 bytes
+func calcNonce(sessionID string) ([]byte, error) {
+	hash := blake3.New(32, nil)
+	_, err := hash.Write([]byte(sessionID))
+	if err != nil {
+		return nil, err
+	}
+	// Read the hash into a byte slice
+	nonce := make([]byte, 12)
+	_, err = hash.Write(nonce)
+	if err != nil {
+		return nil, err
+	}
+	return nonce, nil
+}