ucan/
serde.rs

1use anyhow::Result;
2use base64::Engine;
3use libipld_core::{
4    codec::{Decode, Encode},
5    ipld::Ipld,
6    serde::{from_ipld, to_ipld},
7};
8use libipld_json::DagJsonCodec;
9use serde::{de::DeserializeOwned, Serialize, Serializer};
10use std::io::Cursor;
11
12/// Utility function to enforce lower-case string values when serializing
13pub fn ser_to_lower_case<S>(string: &str, serializer: S) -> Result<S::Ok, S::Error>
14where
15    S: Serializer,
16{
17    serializer.serialize_str(&string.to_lowercase())
18}
19
20/// Helper trait to ser/de any serde-implementing value to/from DAG-JSON
21pub trait DagJson: Serialize + DeserializeOwned {
22    fn to_dag_json(&self) -> Result<Vec<u8>> {
23        let ipld = to_ipld(self)?;
24        let mut json_bytes = Vec::new();
25
26        ipld.encode(DagJsonCodec, &mut json_bytes)?;
27
28        Ok(json_bytes)
29    }
30
31    fn from_dag_json(json_bytes: &[u8]) -> Result<Self> {
32        let ipld = Ipld::decode(DagJsonCodec, &mut Cursor::new(json_bytes))?;
33        Ok(from_ipld(ipld)?)
34    }
35}
36
37impl<T> DagJson for T where T: Serialize + DeserializeOwned {}
38
39/// Helper trait to encode structs as base64 as part of creating a JWT
40pub trait Base64Encode: DagJson {
41    fn jwt_base64_encode(&self) -> Result<String> {
42        Ok(base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(self.to_dag_json()?))
43    }
44}
45
46impl<T> Base64Encode for T where T: DagJson {}
ucan/serde.rs

ucan/
serde.rs
