CACAOs

CACAOs is a Rust library implementing the CAIP-74 Chain-Agnostic Object Capability Specification, with built in support for Sign In With Ethereum.

Example

A simple example using SIWE-type CACAOs:

``` rust use asynctrait::asynctrait; use cacaos::{ siwecacao::{Eip191, Eip4361, Payload, SiweCacao}, SignatureScheme, }; use futures::executor::blockon; use hex::FromHex; use libipld::{cbor::DagCborCodec, codec::Encode, multihash::Code, store::DefaultParams, Block}; use siwe::Message; use std::str::FromStr;

async fn runexample() { let message: Payload = Message::fromstr( r#"localhost:4361 wants you to sign in with your Ethereum account: 0x6Da01670d8fc844e736095918bbE11fE8D564163

SIWE Notepad Example

URI: http://localhost:4361 Version: 1 Chain ID: 1 Nonce: kEWepMt9knR6lWJ6A Issued At: 2021-12-07T18:28:18.807Z"#, ) .unwrap() .into();

let sig = <Vec<u8>>::from_hex(r#"6228b3ecd7bf2df018183aeab6b6f1db1e9f4e3cbe24560404112e25363540eb679934908143224d746bbb5e1aa65ab435684081f4dbb74a0fec57f98f40f5051c"#).unwrap().try_into().unwrap();

// verify a siwe signature
let v = Eip191::verify(&message, &sig).await.unwrap();

// sign the message to create a cacao
let cacao: SiweCacao = SiweCacao::new(message, sig, None);

// ipld-encode the cacao
let block = Block::<DefaultParams>::encode(DagCborCodec, Code::Blake3_256, &cacao).unwrap();

}

fn main() { blockon(runexample()); }

```

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