From 7203f324998791ea91d3aa8c5f5d0d05a6600d1c Mon Sep 17 00:00:00 2001
From: Chris Joel <0xcda7a@gmail.com>
Date: Fri, 1 Apr 2022 15:28:19 -0700
Subject: [PATCH] Omit unused nbf and nnc

---
 ucan-key-support/Cargo.toml | 4 ++--
 ucan/Cargo.toml             | 2 +-
 ucan/src/ucan.rs            | 3 ++-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/ucan-key-support/Cargo.toml b/ucan-key-support/Cargo.toml
index c61d03a8..d035915d 100644
--- a/ucan-key-support/Cargo.toml
+++ b/ucan-key-support/Cargo.toml
@@ -14,14 +14,14 @@ repository = "https://github.com/cdata/rs-ucan/"
 homepage = "https://github.com/cdata/rs-ucan"
 license = "Apache-2.0"
 readme = "README.md"
-version = "0.3.0-alpha.5"
+version = "0.3.0-alpha.6"
 
 [features]
 default = []
 web = ["wasm-bindgen", "wasm-bindgen-futures", "js-sys", "web-sys", "ucan/web", "getrandom/js"]
 
 [dependencies]
-ucan = {path = "../ucan", version = "0.5.0-alpha.5" }
+ucan = {path = "../ucan", version = "0.5.0-alpha.6" }
 anyhow = "1.0.52"
 async-trait = "0.1.52"
 ed25519-zebra = "^3"
diff --git a/ucan/Cargo.toml b/ucan/Cargo.toml
index bd54094a..df9482c4 100644
--- a/ucan/Cargo.toml
+++ b/ucan/Cargo.toml
@@ -13,7 +13,7 @@ repository = "https://github.com/cdata/rs-ucan/"
 homepage = "https://github.com/cdata/rs-ucan"
 license = "Apache-2.0"
 readme = "README.md"
-version = "0.5.0-alpha.5"
+version = "0.5.0-alpha.6"
 edition = "2021"
 
 [features]
diff --git a/ucan/src/ucan.rs b/ucan/src/ucan.rs
index 912dee32..a140f93e 100644
--- a/ucan/src/ucan.rs
+++ b/ucan/src/ucan.rs
@@ -5,7 +5,6 @@ use serde_json::Value;
 use std::str;
 use std::sync::Arc;
 
-// use crate::crypto::did::{did_to_signing_key, SigningKeyResult};
 use crate::crypto::did::DidParser;
 use crate::time::now;
 
@@ -21,7 +20,9 @@ pub struct UcanPayload {
     pub iss: String,
     pub aud: String,
     pub exp: u64,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub nbf: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub nnc: Option<String>,
     pub att: Vec<Value>,
     pub fct: Vec<Value>,