Master (#1262)

* clear

* feat: Add everything

* fix: Commenht

bridge/handlers/errors.go

@@ -0,0 +1,33 @@
+package handlers
+
+import "errors"
+
+// Common errors for OAuth2 and UCAN handling
+var (
+	// Client errors
+	ErrClientNotFound           = errors.New("client not found")
+	ErrInvalidClientCredentials = errors.New("invalid client credentials")
+
+	// Token errors
+	ErrTokenNotFound = errors.New("token not found")
+	ErrTokenExpired  = errors.New("token has expired")
+	ErrInvalidToken  = errors.New("invalid token")
+	ErrTokenRevoked  = errors.New("token has been revoked")
+
+	// Authorization errors
+	ErrUnauthorized      = errors.New("unauthorized")
+	ErrInsufficientScope = errors.New("insufficient scope")
+	ErrInvalidScope      = errors.New("invalid scope")
+	ErrScopeNotAllowed   = errors.New("scope not allowed for client")
+
+	// UCAN errors
+	ErrInvalidAttenuation  = errors.New("invalid attenuation")
+	ErrInvalidDelegation   = errors.New("invalid delegation")
+	ErrBrokenChain         = errors.New("broken delegation chain")
+	ErrPrivilegeEscalation = errors.New("privilege escalation attempted")
+
+	// OIDC errors
+	ErrInvalidRedirectURI  = errors.New("invalid redirect URI")
+	ErrInvalidResponseType = errors.New("invalid response type")
+	ErrInvalidGrantType    = errors.New("invalid grant type")
+)